From: CK Hu <ck...@mediatek.com>
This patch adds an initial DRM driver for the Mediatek MT8173 DISP
subsystem. It currently supports two fixed output streams from the
OVL0/OVL1 sources to the DSI0/DPI0 sinks, respectively.
Signed-off-by: CK Hu <ck...@mediatek.com>
Signed-off-by: YT Shen <yt.s...@mediatek.com>
Signed-off-by: Daniel Kurtz <djku...@chromium.org>
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
---
Changes since v7:
- Move PANEL and MIPI_DSI config selection to later patches
- Sort object files alphabetically in Makefile
- Drop mtk_crtc->pipe, use drm_crtc_handle_vblank instead
- Move copied event from mtk_crtc_state back to mtk_crtc
- Wait for exclusive fences on incoming framebuffers
using reservation_object_wait_timeout_rcu in .atomic_complete().
- Add missing atomic destroy_state callbacks
- Rename mtk_crtc_ddp_power_on/of to _clk_enable/disable
- Add a pending_planes flag to mtk_crtc so we can atomically update the plane
configuration
- Fold mtk_drm_crtc_commit into mtk_drm_crtc_atomic_flush
- Make all ddp_comp callbacks take a struct mtk_ddp_comp * first parameter.
- Fix OD ddp_comp function setup
- Defer until iommu is present
- Fix probe error path
- Relax some writels
---
drivers/gpu/drm/Kconfig | 2 +
drivers/gpu/drm/Makefile | 1 +
drivers/gpu/drm/mediatek/Kconfig | 12 +
drivers/gpu/drm/mediatek/Makefile | 10 +
drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 301 ++++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_crtc.c | 603 ++++++++++++++++++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_crtc.h | 32 ++
drivers/gpu/drm/mediatek/mtk_drm_ddp.c | 355 ++++++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_ddp.h | 41 ++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 275 +++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 148 +++++++
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 577 ++++++++++++++++++++++++++
drivers/gpu/drm/mediatek/mtk_drm_drv.h | 52 +++
drivers/gpu/drm/mediatek/mtk_drm_fb.c | 165 ++++++++
drivers/gpu/drm/mediatek/mtk_drm_fb.h | 29 ++
drivers/gpu/drm/mediatek/mtk_drm_gem.c | 227 +++++++++++
drivers/gpu/drm/mediatek/mtk_drm_gem.h | 55 +++
drivers/gpu/drm/mediatek/mtk_drm_plane.c | 242 +++++++++++
drivers/gpu/drm/mediatek/mtk_drm_plane.h | 59 +++
19 files changed, 3186 insertions(+)
create mode 100644 drivers/gpu/drm/mediatek/Kconfig
create mode 100644 drivers/gpu/drm/mediatek/Makefile
create mode 100644 drivers/gpu/drm/mediatek/mtk_disp_ovl.c
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_crtc.c
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_crtc.h
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_ddp.c
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_ddp.h
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_drv.c
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_drv.h
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_fb.c
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_fb.h
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_gem.c
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_gem.h
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_plane.c
create mode 100644 drivers/gpu/drm/mediatek/mtk_drm_plane.h
diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
index c4bf9a1..8fdb0c2 100644
--- a/drivers/gpu/drm/Kconfig
+++ b/drivers/gpu/drm/Kconfig
@@ -266,3 +266,5 @@ source "drivers/gpu/drm/amd/amdkfd/Kconfig"
source "drivers/gpu/drm/imx/Kconfig"
source "drivers/gpu/drm/vc4/Kconfig"
+
+source "drivers/gpu/drm/mediatek/Kconfig"
diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 1e9ff4c..607a49f 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -71,6 +71,7 @@ obj-$(CONFIG_DRM_MSM) += msm/
obj-$(CONFIG_DRM_TEGRA) += tegra/
obj-$(CONFIG_DRM_STI) += sti/
obj-$(CONFIG_DRM_IMX) += imx/
+obj-$(CONFIG_DRM_MEDIATEK) += mediatek/
obj-y += i2c/
obj-y += panel/
obj-y += bridge/
diff --git a/drivers/gpu/drm/mediatek/Kconfig b/drivers/gpu/drm/mediatek/Kconfig
new file mode 100644
index 0000000..8dad892
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/Kconfig
@@ -0,0 +1,12 @@
+config DRM_MEDIATEK
+ tristate "DRM Support for Mediatek SoCs"
+ depends on DRM
+ depends on ARCH_MEDIATEK || (ARM && COMPILE_TEST)
+ select DRM_KMS_HELPER
+ select IOMMU_DMA
+ select MTK_SMI
+ help
+ Choose this option if you have a Mediatek SoCs.
+ The module will be called mediatek-drm
+ This driver provides kernel mode setting and
+ buffer management to userspace.
diff --git a/drivers/gpu/drm/mediatek/Makefile
b/drivers/gpu/drm/mediatek/Makefile
new file mode 100644
index 0000000..c7cc41a
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/Makefile
@@ -0,0 +1,10 @@
+mediatek-drm-y := mtk_disp_ovl.o \
+ mtk_drm_crtc.o \
+ mtk_drm_ddp.o \
+ mtk_drm_ddp_comp.o \
+ mtk_drm_drv.o \
+ mtk_drm_fb.o \
+ mtk_drm_gem.o \
+ mtk_drm_plane.o
+
+obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
new file mode 100644
index 0000000..455e62e
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -0,0 +1,301 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+
+#include "mtk_drm_crtc.h"
+#include "mtk_drm_ddp_comp.h"
+
+#define DISP_REG_OVL_INTEN 0x0004
+#define OVL_FME_CPL_INT BIT(1)
+#define DISP_REG_OVL_INTSTA 0x0008
+#define DISP_REG_OVL_EN 0x000c
+#define DISP_REG_OVL_RST 0x0014
+#define DISP_REG_OVL_ROI_SIZE 0x0020
+#define DISP_REG_OVL_ROI_BGCLR 0x0028
+#define DISP_REG_OVL_SRC_CON 0x002c
+#define DISP_REG_OVL_CON(n) (0x0030 + 0x20 * (n))
+#define DISP_REG_OVL_SRC_SIZE(n) (0x0038 + 0x20 * (n))
+#define DISP_REG_OVL_OFFSET(n) (0x003c + 0x20 * (n))
+#define DISP_REG_OVL_PITCH(n) (0x0044 + 0x20 * (n))
+#define DISP_REG_OVL_RDMA_CTRL(n) (0x00c0 + 0x20 * (n))
+#define DISP_REG_OVL_RDMA_GMC(n) (0x00c8 + 0x20 * (n))
+#define DISP_REG_OVL_ADDR(n) (0x0f40 + 0x20 * (n))
+
+enum OVL_INPUT_FORMAT {
+ OVL_INFMT_RGB565 = 0,
+ OVL_INFMT_RGB888 = 1,
+ OVL_INFMT_RGBA8888 = 2,
+ OVL_INFMT_ARGB8888 = 3,
+};
+
+#define OVL_RDMA_MEM_GMC 0x40402020
+#define OVL_AEN BIT(8)
+#define OVL_ALPHA 0xff
+
+/**
+ * struct mtk_disp_ovl - DISP_OVL driver structure
+ * @ddp_comp - structure containing type enum and hardware resources
+ * @drm_device - backlink to allow the irq handler to find the associated crtc
+ */
+struct mtk_disp_ovl {
+ struct mtk_ddp_comp ddp_comp;
+ struct drm_device *drm_dev;
+};
+
+static irqreturn_t mtk_disp_ovl_irq_handler(int irq, void *dev_id)
+{
+ struct mtk_disp_ovl *priv = dev_id;
+ struct mtk_ddp_comp *ovl = &priv->ddp_comp;
+
+ /* Clear frame completion interrupt */
+ writel(0x0, ovl->regs + DISP_REG_OVL_INTSTA);
+
+ mtk_crtc_ddp_irq(priv->drm_dev, ovl);
+
+ return IRQ_HANDLED;
+}
+
+static void mtk_ovl_enable_vblank(struct mtk_ddp_comp *comp)
+{
+ writel_relaxed(OVL_FME_CPL_INT, comp->regs + DISP_REG_OVL_INTEN);
+}
+
+static void mtk_ovl_disable_vblank(struct mtk_ddp_comp *comp)
+{
+ writel_relaxed(0x0, comp->regs + DISP_REG_OVL_INTEN);
+}
+
+static void mtk_ovl_start(struct mtk_ddp_comp *comp)
+{
+ writel_relaxed(0x1, comp->regs + DISP_REG_OVL_EN);
+}
+
+static void mtk_ovl_stop(struct mtk_ddp_comp *comp)
+{
+ writel_relaxed(0x0, comp->regs + DISP_REG_OVL_EN);
+}
+
+static void mtk_ovl_config(struct mtk_ddp_comp *comp, unsigned int w,
+ unsigned int h, unsigned int vrefresh)
+{
+ if (w != 0 && h != 0)
+ writel_relaxed(h << 16 | w, comp->regs + DISP_REG_OVL_ROI_SIZE);
+ writel_relaxed(0x0, comp->regs + DISP_REG_OVL_ROI_BGCLR);
+
+ writel(0x1, comp->regs + DISP_REG_OVL_RST);
+ writel(0x0, comp->regs + DISP_REG_OVL_RST);
+}
+
+static bool has_rb_swapped(unsigned int fmt)
+{
+ switch (fmt) {
+ case DRM_FORMAT_BGR888:
+ case DRM_FORMAT_BGR565:
+ case DRM_FORMAT_ABGR8888:
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_BGRA8888:
+ case DRM_FORMAT_BGRX8888:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static unsigned int ovl_fmt_convert(unsigned int fmt)
+{
+ switch (fmt) {
+ case DRM_FORMAT_RGB888:
+ case DRM_FORMAT_BGR888:
+ return OVL_INFMT_RGB888;
+ case DRM_FORMAT_RGB565:
+ case DRM_FORMAT_BGR565:
+ return OVL_INFMT_RGB565;
+ case DRM_FORMAT_RGBX8888:
+ case DRM_FORMAT_RGBA8888:
+ case DRM_FORMAT_BGRX8888:
+ case DRM_FORMAT_BGRA8888:
+ return OVL_INFMT_ARGB8888;
+ case DRM_FORMAT_XRGB8888:
+ case DRM_FORMAT_ARGB8888:
+ case DRM_FORMAT_XBGR8888:
+ case DRM_FORMAT_ABGR8888:
+ return OVL_INFMT_RGBA8888;
+ default:
+ DRM_ERROR("unsupported format[%08x]\n", fmt);
+ return OVL_INFMT_RGB888;
+ }
+}
+
+static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
+{
+ unsigned int reg;
+
+ writel(0x1, comp->regs + DISP_REG_OVL_RDMA_CTRL(idx));
+ writel(OVL_RDMA_MEM_GMC, comp->regs + DISP_REG_OVL_RDMA_GMC(idx));
+
+ reg = readl(comp->regs + DISP_REG_OVL_SRC_CON);
+ reg = reg | BIT(idx);
+ writel(reg, comp->regs + DISP_REG_OVL_SRC_CON);
+}
+
+static void mtk_ovl_layer_off(struct mtk_ddp_comp *comp, unsigned int idx)
+{
+ unsigned int reg;
+
+ reg = readl(comp->regs + DISP_REG_OVL_SRC_CON);
+ reg = reg & ~BIT(idx);
+ writel(reg, comp->regs + DISP_REG_OVL_SRC_CON);
+
+ writel(0x0, comp->regs + DISP_REG_OVL_RDMA_CTRL(idx));
+}
+
+static void mtk_ovl_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
+ struct mtk_plane_state *state)
+{
+ struct mtk_plane_pending_state *pending = &state->pending;
+ unsigned int addr = pending->addr;
+ unsigned int pitch = pending->pitch & 0xffff;
+ unsigned int fmt = pending->format;
+ unsigned int offset = (pending->y << 16) | pending->x;
+ unsigned int src_size = (pending->height << 16) | pending->width;
+ unsigned int con;
+
+ con = has_rb_swapped(fmt) << 24 | ovl_fmt_convert(fmt) << 12;
+ if (idx != 0)
+ con |= OVL_AEN | OVL_ALPHA;
+
+ writel(con, comp->regs + DISP_REG_OVL_CON(idx));
+ writel(pitch, comp->regs + DISP_REG_OVL_PITCH(idx));
+ writel(src_size, comp->regs + DISP_REG_OVL_SRC_SIZE(idx));
+ writel(offset, comp->regs + DISP_REG_OVL_OFFSET(idx));
+ writel(addr, comp->regs + DISP_REG_OVL_ADDR(idx));
+}
+
+static const struct mtk_ddp_comp_funcs mtk_disp_ovl_funcs = {
+ .config = mtk_ovl_config,
+ .start = mtk_ovl_start,
+ .stop = mtk_ovl_stop,
+ .enable_vblank = mtk_ovl_enable_vblank,
+ .disable_vblank = mtk_ovl_disable_vblank,
+ .layer_on = mtk_ovl_layer_on,
+ .layer_off = mtk_ovl_layer_off,
+ .layer_config = mtk_ovl_layer_config,
+};
+
+static int mtk_disp_ovl_bind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct mtk_disp_ovl *priv = dev_get_drvdata(dev);
+ struct drm_device *drm_dev = data;
+ int ret;
+
+ priv->drm_dev = drm_dev;
+
+ ret = mtk_ddp_comp_register(drm_dev, &priv->ddp_comp);
+ if (ret < 0) {
+ dev_err(dev, "Failed to register component %s: %d\n",
+ dev->of_node->full_name, ret);
+ return ret;
+ }
+
+ return 0;
+
+}
+
+static void mtk_disp_ovl_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct mtk_disp_ovl *priv = dev_get_drvdata(dev);
+ struct drm_device *drm_dev = data;
+
+ mtk_ddp_comp_unregister(drm_dev, &priv->ddp_comp);
+}
+
+static const struct component_ops mtk_disp_ovl_component_ops = {
+ .bind = mtk_disp_ovl_bind,
+ .unbind = mtk_disp_ovl_unbind,
+};
+
+static int mtk_disp_ovl_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mtk_disp_ovl *priv;
+ int comp_id;
+ int irq;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ ret = devm_request_irq(dev, irq, mtk_disp_ovl_irq_handler,
+ IRQF_TRIGGER_NONE, dev_name(dev), priv);
+ if (ret < 0) {
+ dev_err(dev, "Failed to request irq %d: %d\n", irq, ret);
+ return ret;
+ }
+
+ comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DISP_OVL);
+ if (comp_id < 0) {
+ dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
+ return comp_id;
+ }
+
+ ret = mtk_ddp_comp_init(dev, dev->of_node, &priv->ddp_comp, comp_id,
+ &mtk_disp_ovl_funcs);
+ if (ret) {
+ dev_err(dev, "Failed to initialize component: %d\n", ret);
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, priv);
+
+ ret = component_add(dev, &mtk_disp_ovl_component_ops);
+ if (ret)
+ dev_err(dev, "Failed to add component: %d\n", ret);
+
+ return ret;
+}
+
+static int mtk_disp_ovl_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &mtk_disp_ovl_component_ops);
+
+ return 0;
+}
+
+static const struct of_device_id mtk_disp_ovl_driver_dt_match[] = {
+ { .compatible = "mediatek,mt8173-disp-ovl", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mtk_disp_ovl_driver_dt_match);
+
+struct platform_driver mtk_disp_ovl_driver = {
+ .probe = mtk_disp_ovl_probe,
+ .remove = mtk_disp_ovl_remove,
+ .driver = {
+ .name = "mediatek-disp-ovl",
+ .owner = THIS_MODULE,
+ .of_match_table = mtk_disp_ovl_driver_dt_match,
+ },
+};
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
new file mode 100644
index 0000000..42f6e54
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.c
@@ -0,0 +1,603 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <asm/barrier.h>
+#include <drm/drmP.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_plane_helper.h>
+#include <linux/clk.h>
+#include <linux/pm_runtime.h>
+#include <soc/mediatek/smi.h>
+
+#include "mtk_drm_drv.h"
+#include "mtk_drm_crtc.h"
+#include "mtk_drm_ddp.h"
+#include "mtk_drm_ddp_comp.h"
+#include "mtk_drm_gem.h"
+#include "mtk_drm_plane.h"
+
+/**
+ * struct mtk_drm_crtc - MediaTek specific crtc structure.
+ * @base: crtc object.
+ * @enabled: records whether crtc_enable succeeded
+ * @do_flush: enabled by atomic_flush, causes plane atomic_update to commit
+ * changed state immediately.
+ * @planes: array of 4 mtk_drm_plane structures, one for each overlay plane
+ * @pending_planes: whether any plane has pending changes to be applied
+ * @config_regs: memory mapped mmsys configuration register space
+ * @mutex: handle to one of the ten disp_mutex streams
+ * @ddp_comp_nr: number of components in ddp_comp
+ * @ddp_comp: array of pointers the mtk_ddp_comp structures used by this crtc
+ */
+struct mtk_drm_crtc {
+ struct drm_crtc base;
+ bool enabled;
+
+ bool do_flush;
+ bool pending_needs_vblank;
+ struct drm_pending_vblank_event *event;
+
+ struct mtk_drm_plane planes[OVL_LAYER_NR];
+ bool pending_planes;
+
+ void __iomem *config_regs;
+ struct mtk_disp_mutex *mutex;
+ unsigned int ddp_comp_nr;
+ struct mtk_ddp_comp **ddp_comp;
+};
+
+struct mtk_crtc_state {
+ struct drm_crtc_state base;
+
+ bool pending_config;
+ unsigned int pending_width;
+ unsigned int pending_height;
+ unsigned int pending_vrefresh;
+};
+
+static inline struct mtk_drm_crtc *to_mtk_crtc(struct drm_crtc *c)
+{
+ return container_of(c, struct mtk_drm_crtc, base);
+}
+
+static inline struct mtk_crtc_state *to_mtk_crtc_state(struct drm_crtc_state
*s)
+{
+ return container_of(s, struct mtk_crtc_state, base);
+}
+
+/*
+ * Given a DDP source component (OVL or RDMA), find the crtc that has this
+ * component as first element of its ddp_comp array. This allows to deliver
+ * the source component's end of frame interrupt to the corresponding crtc.
+ */
+static struct mtk_drm_crtc *mtk_crtc_by_src_comp(struct mtk_drm_private *priv,
+ struct mtk_ddp_comp *ddp_comp)
+{
+ struct mtk_drm_crtc *mtk_crtc;
+ int i;
+
+ for (i = 0; i < MAX_CRTC; i++) {
+ mtk_crtc = to_mtk_crtc(priv->crtc[i]);
+ if (mtk_crtc->ddp_comp[0] == ddp_comp)
+ return mtk_crtc;
+ }
+
+ return NULL;
+}
+
+static void mtk_drm_crtc_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
+{
+ struct drm_crtc *crtc = &mtk_crtc->base;
+ unsigned long flags;
+
+ spin_lock_irqsave(&crtc->dev->event_lock, flags);
+ drm_send_vblank_event(crtc->dev, mtk_crtc->event->pipe,
mtk_crtc->event);
+ drm_crtc_vblank_put(crtc);
+ mtk_crtc->event = NULL;
+ spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
+}
+
+static void mtk_drm_finish_page_flip(struct mtk_drm_crtc *mtk_crtc)
+{
+ drm_crtc_handle_vblank(&mtk_crtc->base);
+ if (mtk_crtc->pending_needs_vblank) {
+ mtk_drm_crtc_finish_page_flip(mtk_crtc);
+ mtk_crtc->pending_needs_vblank = false;
+ }
+}
+
+static void mtk_drm_crtc_destroy(struct drm_crtc *crtc)
+{
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+ int i;
+
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
+ clk_unprepare(mtk_crtc->ddp_comp[i]->clk);
+
+ mtk_disp_mutex_put(mtk_crtc->mutex);
+
+ drm_crtc_cleanup(crtc);
+}
+
+static void mtk_drm_crtc_reset(struct drm_crtc *crtc)
+{
+ struct mtk_crtc_state *state;
+
+ if (crtc->state) {
+ if (crtc->state->mode_blob)
+ drm_property_unreference_blob(crtc->state->mode_blob);
+
+ state = to_mtk_crtc_state(crtc->state);
+ memset(state, 0, sizeof(*state));
+ } else {
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return;
+ crtc->state = &state->base;
+ }
+
+ state->base.crtc = crtc;
+}
+
+static struct drm_crtc_state *mtk_drm_crtc_duplicate_state(struct drm_crtc
*crtc)
+{
+ struct mtk_crtc_state *state;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return NULL;
+
+ __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base);
+
+ WARN_ON(state->base.crtc != crtc);
+ state->base.crtc = crtc;
+
+ return &state->base;
+}
+
+static void mtk_drm_crtc_destroy_state(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ __drm_atomic_helper_crtc_destroy_state(crtc, state);
+ kfree(to_mtk_crtc_state(state));
+}
+
+static bool mtk_drm_crtc_mode_fixup(struct drm_crtc *crtc,
+ const struct drm_display_mode *mode,
+ struct drm_display_mode *adjusted_mode)
+{
+ /* Nothing to do here, but this callback is mandatory. */
+ return true;
+}
+
+static void mtk_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
+{
+ struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
+
+ state->pending_width = crtc->mode.hdisplay;
+ state->pending_height = crtc->mode.vdisplay;
+ state->pending_vrefresh = crtc->mode.vrefresh;
+ wmb(); /* Make sure the above parameters are set before update */
+ state->pending_config = true;
+}
+
+int mtk_drm_crtc_enable_vblank(struct drm_device *drm, unsigned int pipe)
+{
+ struct mtk_drm_private *priv = drm->dev_private;
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(priv->crtc[pipe]);
+ struct mtk_ddp_comp *ovl = mtk_crtc->ddp_comp[0];
+
+ mtk_ddp_comp_enable_vblank(ovl);
+
+ return 0;
+}
+
+void mtk_drm_crtc_disable_vblank(struct drm_device *drm, unsigned int pipe)
+{
+ struct mtk_drm_private *priv = drm->dev_private;
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(priv->crtc[pipe]);
+ struct mtk_ddp_comp *ovl = mtk_crtc->ddp_comp[0];
+
+ mtk_ddp_comp_disable_vblank(ovl);
+}
+
+static int mtk_crtc_ddp_clk_enable(struct mtk_drm_crtc *mtk_crtc)
+{
+ int ret;
+ int i;
+
+ DRM_DEBUG_DRIVER("%s\n", __func__);
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
+ ret = clk_enable(mtk_crtc->ddp_comp[i]->clk);
+ if (ret) {
+ DRM_ERROR("Failed to enable clock %d: %d\n", i, ret);
+ goto err;
+ }
+ }
+
+ return 0;
+err:
+ while (--i >= 0)
+ clk_disable(mtk_crtc->ddp_comp[i]->clk);
+ return ret;
+}
+
+static void mtk_crtc_ddp_clk_disable(struct mtk_drm_crtc *mtk_crtc)
+{
+ int i;
+
+ DRM_DEBUG_DRIVER("%s\n", __func__);
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
+ clk_disable(mtk_crtc->ddp_comp[i]->clk);
+}
+
+static int mtk_crtc_ddp_hw_init(struct mtk_drm_crtc *mtk_crtc)
+{
+ struct drm_crtc *crtc = &mtk_crtc->base;
+ unsigned int width, height, vrefresh;
+ int ret;
+ int i;
+
+ DRM_DEBUG_DRIVER("%s\n", __func__);
+ if (WARN_ON(!crtc->state))
+ return -EINVAL;
+
+ width = crtc->state->adjusted_mode.hdisplay;
+ height = crtc->state->adjusted_mode.vdisplay;
+ vrefresh = crtc->state->adjusted_mode.vrefresh;
+
+ ret = pm_runtime_get_sync(crtc->dev->dev);
+ if (ret < 0) {
+ DRM_ERROR("Failed to enable power domain: %d\n", ret);
+ return ret;
+ }
+
+ ret = mtk_disp_mutex_prepare(mtk_crtc->mutex);
+ if (ret < 0) {
+ DRM_ERROR("Failed to enable mutex clock: %d\n", ret);
+ goto err_pm_runtime_put;
+ }
+
+ ret = mtk_crtc_ddp_clk_enable(mtk_crtc);
+ if (ret < 0) {
+ DRM_ERROR("Failed to enable component clocks: %d\n", ret);
+ goto err_mutex_unprepare;
+ }
+
+ DRM_DEBUG_DRIVER("mediatek_ddp_ddp_path_setup\n");
+ for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
+ mtk_ddp_add_comp_to_path(mtk_crtc->config_regs,
+ mtk_crtc->ddp_comp[i]->id,
+ mtk_crtc->ddp_comp[i + 1]->id);
+ mtk_disp_mutex_add_comp(mtk_crtc->mutex,
+ mtk_crtc->ddp_comp[i]->id);
+ }
+ mtk_disp_mutex_add_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
+ mtk_disp_mutex_enable(mtk_crtc->mutex);
+
+ DRM_DEBUG_DRIVER("ddp_disp_path_power_on %dx%d\n", width, height);
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
+ struct mtk_ddp_comp *comp = mtk_crtc->ddp_comp[i];
+
+ mtk_ddp_comp_config(comp, width, height, vrefresh);
+ mtk_ddp_comp_start(comp);
+ }
+
+ return 0;
+
+err_mutex_unprepare:
+ mtk_disp_mutex_unprepare(mtk_crtc->mutex);
+err_pm_runtime_put:
+ pm_runtime_put(crtc->dev->dev);
+ return ret;
+}
+
+static void mtk_crtc_ddp_hw_fini(struct mtk_drm_crtc *mtk_crtc)
+{
+ struct drm_device *drm = mtk_crtc->base.dev;
+ int i;
+
+ DRM_DEBUG_DRIVER("%s\n", __func__);
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
+ mtk_ddp_comp_stop(mtk_crtc->ddp_comp[i]);
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++)
+ mtk_disp_mutex_remove_comp(mtk_crtc->mutex,
+ mtk_crtc->ddp_comp[i]->id);
+ mtk_disp_mutex_disable(mtk_crtc->mutex);
+ for (i = 0; i < mtk_crtc->ddp_comp_nr - 1; i++) {
+ mtk_ddp_remove_comp_from_path(mtk_crtc->config_regs,
+ mtk_crtc->ddp_comp[i]->id,
+ mtk_crtc->ddp_comp[i + 1]->id);
+ mtk_disp_mutex_remove_comp(mtk_crtc->mutex,
+ mtk_crtc->ddp_comp[i]->id);
+ }
+ mtk_disp_mutex_remove_comp(mtk_crtc->mutex, mtk_crtc->ddp_comp[i]->id);
+ mtk_crtc_ddp_clk_disable(mtk_crtc);
+ mtk_disp_mutex_unprepare(mtk_crtc->mutex);
+
+ pm_runtime_put(drm->dev);
+}
+
+static void mtk_drm_crtc_enable(struct drm_crtc *crtc)
+{
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+ struct mtk_ddp_comp *ovl = mtk_crtc->ddp_comp[0];
+ int ret;
+
+ DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
+
+ ret = mtk_smi_larb_get(ovl->larb_dev);
+ if (ret) {
+ DRM_ERROR("Failed to get larb: %d\n", ret);
+ return;
+ }
+
+ ret = mtk_crtc_ddp_hw_init(mtk_crtc);
+ if (ret) {
+ mtk_smi_larb_put(ovl->larb_dev);
+ return;
+ }
+
+ drm_crtc_vblank_on(crtc);
+ mtk_crtc->enabled = true;
+}
+
+static void mtk_drm_crtc_disable(struct drm_crtc *crtc)
+{
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+ struct mtk_ddp_comp *ovl = mtk_crtc->ddp_comp[0];
+ int i;
+
+ DRM_DEBUG_DRIVER("%s %d\n", __func__, crtc->base.id);
+ if (WARN_ON(!mtk_crtc->enabled))
+ return;
+
+ /* Set all pending plane state to disabled */
+ for (i = 0; i < OVL_LAYER_NR; i++) {
+ struct drm_plane *plane = &mtk_crtc->planes[i].base;
+ struct mtk_plane_state *plane_state;
+
+ plane_state = to_mtk_plane_state(plane->state);
+ plane_state->pending.enable = false;
+ plane_state->pending.config = true;
+ }
+ mtk_crtc->pending_planes = true;
+
+ /* Wait for planes to be disabled */
+ drm_crtc_wait_one_vblank(crtc);
+
+ drm_crtc_vblank_off(crtc);
+ mtk_crtc_ddp_hw_fini(mtk_crtc);
+ mtk_smi_larb_put(ovl->larb_dev);
+
+ mtk_crtc->do_flush = false;
+ mtk_crtc->enabled = false;
+}
+
+static void mtk_drm_crtc_atomic_begin(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ struct mtk_crtc_state *state = to_mtk_crtc_state(crtc->state);
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+
+ if (mtk_crtc->event && state->base.event)
+ DRM_ERROR("new event while there is still a pending event\n");
+
+ if (state->base.event) {
+ state->base.event->pipe = drm_crtc_index(crtc);
+ WARN_ON(drm_crtc_vblank_get(crtc) != 0);
+ mtk_crtc->event = state->base.event;
+ state->base.event = NULL;
+ }
+}
+
+void mtk_drm_crtc_check_flush(struct drm_crtc *crtc)
+{
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+ int i;
+
+ if (mtk_crtc->do_flush) {
+ if (mtk_crtc->event)
+ mtk_crtc->pending_needs_vblank = true;
+ for (i = 0; i < OVL_LAYER_NR; i++) {
+ struct drm_plane *plane = &mtk_crtc->planes[i].base;
+ struct mtk_plane_state *plane_state;
+
+ plane_state = to_mtk_plane_state(plane->state);
+ if (plane_state->pending.dirty) {
+ plane_state->pending.config = true;
+ plane_state->pending.dirty = false;
+ }
+ }
+ mtk_crtc->pending_planes = true;
+ mtk_crtc->do_flush = false;
+ }
+}
+
+static void mtk_drm_crtc_atomic_flush(struct drm_crtc *crtc,
+ struct drm_crtc_state *old_crtc_state)
+{
+ struct mtk_drm_crtc *mtk_crtc = to_mtk_crtc(crtc);
+
+ mtk_crtc->do_flush = true;
+ mtk_drm_crtc_check_flush(crtc);
+}
+
+static const struct drm_crtc_funcs mtk_crtc_funcs = {
+ .set_config = drm_atomic_helper_set_config,
+ .page_flip = drm_atomic_helper_page_flip,
+ .destroy = mtk_drm_crtc_destroy,
+ .reset = mtk_drm_crtc_reset,
+ .atomic_duplicate_state = mtk_drm_crtc_duplicate_state,
+ .atomic_destroy_state = mtk_drm_crtc_destroy_state,
+};
+
+static const struct drm_crtc_helper_funcs mtk_crtc_helper_funcs = {
+ .mode_fixup = mtk_drm_crtc_mode_fixup,
+ .mode_set_nofb = mtk_drm_crtc_mode_set_nofb,
+ .enable = mtk_drm_crtc_enable,
+ .disable = mtk_drm_crtc_disable,
+ .atomic_begin = mtk_drm_crtc_atomic_begin,
+ .atomic_flush = mtk_drm_crtc_atomic_flush,
+};
+
+static int mtk_drm_crtc_init(struct drm_device *drm,
+ struct mtk_drm_crtc *mtk_crtc, struct drm_plane *primary,
+ struct drm_plane *cursor, unsigned int pipe)
+{
+ int ret;
+
+ ret = drm_crtc_init_with_planes(drm, &mtk_crtc->base, primary, cursor,
+ &mtk_crtc_funcs);
+ if (ret)
+ goto err_cleanup_crtc;
+
+ drm_crtc_helper_add(&mtk_crtc->base, &mtk_crtc_helper_funcs);
+
+ return 0;
+
+err_cleanup_crtc:
+ drm_crtc_cleanup(&mtk_crtc->base);
+ return ret;
+}
+
+void mtk_crtc_ddp_irq(struct drm_device *drm_dev, struct mtk_ddp_comp *ovl)
+{
+ struct mtk_drm_private *priv = drm_dev->dev_private;
+ struct mtk_drm_crtc *mtk_crtc;
+ struct mtk_crtc_state *state;
+ unsigned int i;
+
+ mtk_crtc = mtk_crtc_by_src_comp(priv, ovl);
+ if (WARN_ON(!mtk_crtc))
+ return;
+
+ state = to_mtk_crtc_state(mtk_crtc->base.state);
+
+ /*
+ * TODO: instead of updating the registers here, we should prepare
+ * working registers in atomic_commit and let the hardware command
+ * queue update module registers on vblank.
+ */
+ if (state->pending_config) {
+ mtk_ddp_comp_config(ovl, state->pending_width,
+ state->pending_height,
+ state->pending_vrefresh);
+
+ state->pending_config = false;
+ }
+
+ if (mtk_crtc->pending_planes) {
+ for (i = 0; i < OVL_LAYER_NR; i++) {
+ struct drm_plane *plane = &mtk_crtc->planes[i].base;
+ struct mtk_plane_state *plane_state;
+
+ plane_state = to_mtk_plane_state(plane->state);
+
+ if (plane_state->pending.config) {
+ if (!plane_state->pending.enable)
+ mtk_ddp_comp_layer_off(ovl, i);
+
+ mtk_ddp_comp_layer_config(ovl, i, plane_state);
+
+ if (plane_state->pending.enable)
+ mtk_ddp_comp_layer_on(ovl, i);
+
+ plane_state->pending.config = false;
+ }
+ }
+ mtk_crtc->pending_planes = false;
+ }
+
+ mtk_drm_finish_page_flip(mtk_crtc);
+}
+
+int mtk_drm_crtc_create(struct drm_device *drm_dev,
+ const enum mtk_ddp_comp_id *path, unsigned int path_len)
+{
+ struct mtk_drm_private *priv = drm_dev->dev_private;
+ struct device *dev = drm_dev->dev;
+ struct mtk_drm_crtc *mtk_crtc;
+ enum drm_plane_type type;
+ unsigned int zpos;
+ int pipe = priv->num_pipes;
+ int ret;
+ int i;
+
+ mtk_crtc = devm_kzalloc(dev, sizeof(*mtk_crtc), GFP_KERNEL);
+ if (!mtk_crtc)
+ return -ENOMEM;
+
+ mtk_crtc->config_regs = priv->config_regs;
+ mtk_crtc->ddp_comp_nr = path_len;
+ mtk_crtc->ddp_comp = devm_kmalloc_array(dev, mtk_crtc->ddp_comp_nr,
+ sizeof(*mtk_crtc->ddp_comp),
+ GFP_KERNEL);
+
+ mtk_crtc->mutex = mtk_disp_mutex_get(priv->mutex_dev, pipe);
+ if (IS_ERR(mtk_crtc->mutex)) {
+ ret = PTR_ERR(mtk_crtc->mutex);
+ dev_err(dev, "Failed to get mutex: %d\n", ret);
+ return ret;
+ }
+
+ for (i = 0; i < mtk_crtc->ddp_comp_nr; i++) {
+ enum mtk_ddp_comp_id comp_id = path[i];
+ struct mtk_ddp_comp *comp;
+
+ comp = priv->ddp_comp[comp_id];
+ if (!comp) {
+ dev_err(dev, "Component %s not initialized\n",
+ priv->comp_node[comp_id]->full_name);
+ ret = -ENODEV;
+ goto unprepare;
+ }
+
+ ret = clk_prepare(comp->clk);
+ if (ret) {
+ dev_err(dev,
+ "Failed to prepare clock for component %s:
%d\n",
+ priv->comp_node[comp_id]->full_name, ret);
+ goto unprepare;
+ }
+
+ mtk_crtc->ddp_comp[i] = comp;
+ }
+
+ for (zpos = 0; zpos < OVL_LAYER_NR; zpos++) {
+ type = (zpos == 0) ? DRM_PLANE_TYPE_PRIMARY :
+ (zpos == 1) ? DRM_PLANE_TYPE_CURSOR :
+ DRM_PLANE_TYPE_OVERLAY;
+ ret = mtk_plane_init(drm_dev, &mtk_crtc->planes[zpos],
+ BIT(pipe), type, zpos);
+ if (ret)
+ goto unprepare;
+ }
+
+ ret = mtk_drm_crtc_init(drm_dev, mtk_crtc, &mtk_crtc->planes[0].base,
+ &mtk_crtc->planes[1].base, pipe);
+ if (ret < 0)
+ goto unprepare;
+
+ priv->crtc[pipe] = &mtk_crtc->base;
+ priv->num_pipes++;
+
+ return 0;
+
+unprepare:
+ while (--i >= 0)
+ clk_unprepare(mtk_crtc->ddp_comp[i]->clk);
+
+ return ret;
+}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
new file mode 100644
index 0000000..94eba3c
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_crtc.h
@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef MTK_DRM_CRTC_H
+#define MTK_DRM_CRTC_H
+
+#include <drm/drm_crtc.h>
+#include "mtk_drm_ddp_comp.h"
+#include "mtk_drm_plane.h"
+
+#define OVL_LAYER_NR 4
+
+int mtk_drm_crtc_enable_vblank(struct drm_device *drm, unsigned int pipe);
+void mtk_drm_crtc_disable_vblank(struct drm_device *drm, unsigned int pipe);
+void mtk_drm_crtc_check_flush(struct drm_crtc *crtc);
+void mtk_drm_crtc_commit(struct drm_crtc *crtc);
+void mtk_crtc_ddp_irq(struct drm_device *drm_dev, struct mtk_ddp_comp *ovl);
+int mtk_drm_crtc_create(struct drm_device *drm_dev,
+ const enum mtk_ddp_comp_id *path,
+ unsigned int path_len);
+
+#endif /* MTK_DRM_CRTC_H */
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
new file mode 100644
index 0000000..16584e4
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.c
@@ -0,0 +1,355 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include "mtk_drm_ddp.h"
+#include "mtk_drm_ddp_comp.h"
+
+#define DISP_REG_CONFIG_DISP_OVL0_MOUT_EN 0x040
+#define DISP_REG_CONFIG_DISP_OVL1_MOUT_EN 0x044
+#define DISP_REG_CONFIG_DISP_OD_MOUT_EN 0x048
+#define DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN 0x04c
+#define DISP_REG_CONFIG_DISP_UFOE_MOUT_EN 0x050
+#define DISP_REG_CONFIG_DISP_COLOR0_SEL_IN 0x084
+#define DISP_REG_CONFIG_DISP_COLOR1_SEL_IN 0x088
+#define DISP_REG_CONFIG_DPI_SEL_IN 0x0ac
+#define DISP_REG_CONFIG_DISP_RDMA1_MOUT_EN 0x0c8
+#define DISP_REG_CONFIG_MMSYS_CG_CON0 0x100
+
+#define DISP_REG_MUTEX_EN(n) (0x20 + 0x20 * (n))
+#define DISP_REG_MUTEX_RST(n) (0x28 + 0x20 * (n))
+#define DISP_REG_MUTEX_MOD(n) (0x2c + 0x20 * (n))
+#define DISP_REG_MUTEX_SOF(n) (0x30 + 0x20 * (n))
+
+#define MUTEX_MOD_DISP_OVL0 BIT(11)
+#define MUTEX_MOD_DISP_OVL1 BIT(12)
+#define MUTEX_MOD_DISP_RDMA0 BIT(13)
+#define MUTEX_MOD_DISP_RDMA1 BIT(14)
+#define MUTEX_MOD_DISP_RDMA2 BIT(15)
+#define MUTEX_MOD_DISP_WDMA0 BIT(16)
+#define MUTEX_MOD_DISP_WDMA1 BIT(17)
+#define MUTEX_MOD_DISP_COLOR0 BIT(18)
+#define MUTEX_MOD_DISP_COLOR1 BIT(19)
+#define MUTEX_MOD_DISP_AAL BIT(20)
+#define MUTEX_MOD_DISP_GAMMA BIT(21)
+#define MUTEX_MOD_DISP_UFOE BIT(22)
+#define MUTEX_MOD_DISP_PWM0 BIT(23)
+#define MUTEX_MOD_DISP_PWM1 BIT(24)
+#define MUTEX_MOD_DISP_OD BIT(25)
+
+#define MUTEX_SOF_SINGLE_MODE 0
+#define MUTEX_SOF_DSI0 1
+#define MUTEX_SOF_DSI1 2
+#define MUTEX_SOF_DPI0 3
+
+#define OVL0_MOUT_EN_COLOR0 0x1
+#define OD_MOUT_EN_RDMA0 0x1
+#define UFOE_MOUT_EN_DSI0 0x1
+#define COLOR0_SEL_IN_OVL0 0x1
+#define OVL1_MOUT_EN_COLOR1 0x1
+#define GAMMA_MOUT_EN_RDMA1 0x1
+#define RDMA1_MOUT_DPI0 0x2
+#define DPI0_SEL_IN_RDMA1 0x1
+#define COLOR1_SEL_IN_OVL1 0x1
+
+struct mtk_disp_mutex {
+ int id;
+ bool claimed;
+};
+
+struct mtk_ddp {
+ struct device *dev;
+ struct clk *clk;
+ void __iomem *regs;
+ struct mtk_disp_mutex mutex[10];
+};
+
+static const unsigned int mutex_mod[DDP_COMPONENT_ID_MAX] = {
+ [DDP_COMPONENT_AAL] = MUTEX_MOD_DISP_AAL,
+ [DDP_COMPONENT_COLOR0] = MUTEX_MOD_DISP_COLOR0,
+ [DDP_COMPONENT_COLOR1] = MUTEX_MOD_DISP_COLOR1,
+ [DDP_COMPONENT_GAMMA] = MUTEX_MOD_DISP_GAMMA,
+ [DDP_COMPONENT_OD] = MUTEX_MOD_DISP_OD,
+ [DDP_COMPONENT_OVL0] = MUTEX_MOD_DISP_OVL0,
+ [DDP_COMPONENT_OVL1] = MUTEX_MOD_DISP_OVL1,
+ [DDP_COMPONENT_PWM0] = MUTEX_MOD_DISP_PWM0,
+ [DDP_COMPONENT_PWM1] = MUTEX_MOD_DISP_PWM1,
+ [DDP_COMPONENT_RDMA0] = MUTEX_MOD_DISP_RDMA0,
+ [DDP_COMPONENT_RDMA1] = MUTEX_MOD_DISP_RDMA1,
+ [DDP_COMPONENT_RDMA2] = MUTEX_MOD_DISP_RDMA2,
+ [DDP_COMPONENT_UFOE] = MUTEX_MOD_DISP_UFOE,
+ [DDP_COMPONENT_WDMA0] = MUTEX_MOD_DISP_WDMA0,
+ [DDP_COMPONENT_WDMA1] = MUTEX_MOD_DISP_WDMA1,
+};
+
+static unsigned int mtk_ddp_mout_en(enum mtk_ddp_comp_id cur,
+ enum mtk_ddp_comp_id next,
+ unsigned int *addr)
+{
+ unsigned int value;
+
+ if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
+ *addr = DISP_REG_CONFIG_DISP_OVL0_MOUT_EN;
+ value = OVL0_MOUT_EN_COLOR0;
+ } else if (cur == DDP_COMPONENT_OD && next == DDP_COMPONENT_RDMA0) {
+ *addr = DISP_REG_CONFIG_DISP_OD_MOUT_EN;
+ value = OD_MOUT_EN_RDMA0;
+ } else if (cur == DDP_COMPONENT_UFOE && next == DDP_COMPONENT_DSI0) {
+ *addr = DISP_REG_CONFIG_DISP_UFOE_MOUT_EN;
+ value = UFOE_MOUT_EN_DSI0;
+ } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
+ *addr = DISP_REG_CONFIG_DISP_OVL1_MOUT_EN;
+ value = OVL1_MOUT_EN_COLOR1;
+ } else if (cur == DDP_COMPONENT_GAMMA && next == DDP_COMPONENT_RDMA1) {
+ *addr = DISP_REG_CONFIG_DISP_GAMMA_MOUT_EN;
+ value = GAMMA_MOUT_EN_RDMA1;
+ } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
+ *addr = DISP_REG_CONFIG_DISP_RDMA1_MOUT_EN;
+ value = RDMA1_MOUT_DPI0;
+ } else {
+ value = 0;
+ }
+
+ return value;
+}
+
+static unsigned int mtk_ddp_sel_in(enum mtk_ddp_comp_id cur,
+ enum mtk_ddp_comp_id next,
+ unsigned int *addr)
+{
+ unsigned int value;
+
+ if (cur == DDP_COMPONENT_OVL0 && next == DDP_COMPONENT_COLOR0) {
+ *addr = DISP_REG_CONFIG_DISP_COLOR0_SEL_IN;
+ value = COLOR0_SEL_IN_OVL0;
+ } else if (cur == DDP_COMPONENT_RDMA1 && next == DDP_COMPONENT_DPI0) {
+ *addr = DISP_REG_CONFIG_DPI_SEL_IN;
+ value = DPI0_SEL_IN_RDMA1;
+ } else if (cur == DDP_COMPONENT_OVL1 && next == DDP_COMPONENT_COLOR1) {
+ *addr = DISP_REG_CONFIG_DISP_COLOR1_SEL_IN;
+ value = COLOR1_SEL_IN_OVL1;
+ } else {
+ value = 0;
+ }
+
+ return value;
+}
+
+void mtk_ddp_add_comp_to_path(void __iomem *config_regs,
+ enum mtk_ddp_comp_id cur,
+ enum mtk_ddp_comp_id next)
+{
+ unsigned int addr, value, reg;
+
+ value = mtk_ddp_mout_en(cur, next, &addr);
+ if (value) {
+ reg = readl_relaxed(config_regs + addr) | value;
+ writel_relaxed(reg, config_regs + addr);
+ }
+
+ value = mtk_ddp_sel_in(cur, next, &addr);
+ if (value) {
+ reg = readl_relaxed(config_regs + addr) | value;
+ writel_relaxed(reg, config_regs + addr);
+ }
+}
+
+void mtk_ddp_remove_comp_from_path(void __iomem *config_regs,
+ enum mtk_ddp_comp_id cur,
+ enum mtk_ddp_comp_id next)
+{
+ unsigned int addr, value, reg;
+
+ value = mtk_ddp_mout_en(cur, next, &addr);
+ if (value) {
+ reg = readl_relaxed(config_regs + addr) & ~value;
+ writel_relaxed(reg, config_regs + addr);
+ }
+
+ value = mtk_ddp_sel_in(cur, next, &addr);
+ if (value) {
+ reg = readl_relaxed(config_regs + addr) & ~value;
+ writel_relaxed(reg, config_regs + addr);
+ }
+}
+
+struct mtk_disp_mutex *mtk_disp_mutex_get(struct device *dev, unsigned int id)
+{
+ struct mtk_ddp *ddp = dev_get_drvdata(dev);
+
+ if (id >= 10)
+ return ERR_PTR(-EINVAL);
+ if (ddp->mutex[id].claimed)
+ return ERR_PTR(-EBUSY);
+
+ ddp->mutex[id].claimed = true;
+
+ return &ddp->mutex[id];
+}
+
+void mtk_disp_mutex_put(struct mtk_disp_mutex *mutex)
+{
+ struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
+ mutex[mutex->id]);
+
+ WARN_ON(&ddp->mutex[mutex->id] != mutex);
+
+ mutex->claimed = false;
+}
+
+int mtk_disp_mutex_prepare(struct mtk_disp_mutex *mutex)
+{
+ struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
+ mutex[mutex->id]);
+ return clk_prepare_enable(ddp->clk);
+}
+
+void mtk_disp_mutex_unprepare(struct mtk_disp_mutex *mutex)
+{
+ struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
+ mutex[mutex->id]);
+ clk_disable_unprepare(ddp->clk);
+}
+
+void mtk_disp_mutex_add_comp(struct mtk_disp_mutex *mutex,
+ enum mtk_ddp_comp_id id)
+{
+ struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
+ mutex[mutex->id]);
+ unsigned int reg;
+
+ WARN_ON(&ddp->mutex[mutex->id] != mutex);
+
+ switch (id) {
+ case DDP_COMPONENT_DSI0:
+ reg = MUTEX_SOF_DSI0;
+ break;
+ case DDP_COMPONENT_DSI1:
+ reg = MUTEX_SOF_DSI0;
+ break;
+ case DDP_COMPONENT_DPI0:
+ reg = MUTEX_SOF_DPI0;
+ break;
+ default:
+ reg = readl_relaxed(ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
+ reg |= mutex_mod[id];
+ writel_relaxed(reg, ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
+ return;
+ }
+
+ writel_relaxed(reg, ddp->regs + DISP_REG_MUTEX_SOF(mutex->id));
+}
+
+void mtk_disp_mutex_remove_comp(struct mtk_disp_mutex *mutex,
+ enum mtk_ddp_comp_id id)
+{
+ struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
+ mutex[mutex->id]);
+ unsigned int reg;
+
+ WARN_ON(&ddp->mutex[mutex->id] != mutex);
+
+ switch (id) {
+ case DDP_COMPONENT_DSI0:
+ case DDP_COMPONENT_DSI1:
+ case DDP_COMPONENT_DPI0:
+ writel_relaxed(MUTEX_SOF_SINGLE_MODE,
+ ddp->regs + DISP_REG_MUTEX_SOF(mutex->id));
+ break;
+ default:
+ reg = readl_relaxed(ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
+ reg &= ~mutex_mod[id];
+ writel_relaxed(reg, ddp->regs + DISP_REG_MUTEX_MOD(mutex->id));
+ break;
+ }
+}
+
+void mtk_disp_mutex_enable(struct mtk_disp_mutex *mutex)
+{
+ struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
+ mutex[mutex->id]);
+
+ WARN_ON(&ddp->mutex[mutex->id] != mutex);
+
+ writel(1, ddp->regs + DISP_REG_MUTEX_EN(mutex->id));
+}
+
+void mtk_disp_mutex_disable(struct mtk_disp_mutex *mutex)
+{
+ struct mtk_ddp *ddp = container_of(mutex, struct mtk_ddp,
+ mutex[mutex->id]);
+
+ WARN_ON(&ddp->mutex[mutex->id] != mutex);
+
+ writel(0, ddp->regs + DISP_REG_MUTEX_EN(mutex->id));
+}
+
+static int mtk_ddp_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mtk_ddp *ddp;
+ struct resource *regs;
+ int i;
+
+ ddp = devm_kzalloc(dev, sizeof(*ddp), GFP_KERNEL);
+ if (!ddp)
+ return -ENOMEM;
+
+ for (i = 0; i < 10; i++)
+ ddp->mutex[i].id = i;
+
+ ddp->clk = devm_clk_get(dev, NULL);
+ if (IS_ERR(ddp->clk)) {
+ dev_err(dev, "Failed to get clock\n");
+ return PTR_ERR(ddp->clk);
+ }
+
+ regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ddp->regs = devm_ioremap_resource(dev, regs);
+ if (IS_ERR(ddp->regs)) {
+ dev_err(dev, "Failed to map mutex registers\n");
+ return PTR_ERR(ddp->regs);
+ }
+
+ platform_set_drvdata(pdev, ddp);
+
+ return 0;
+}
+
+static int mtk_ddp_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static const struct of_device_id ddp_driver_dt_match[] = {
+ { .compatible = "mediatek,mt8173-disp-mutex" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ddp_driver_dt_match);
+
+static struct platform_driver mtk_ddp_driver = {
+ .probe = mtk_ddp_probe,
+ .remove = mtk_ddp_remove,
+ .driver = {
+ .name = "mediatek-ddp",
+ .owner = THIS_MODULE,
+ .of_match_table = ddp_driver_dt_match,
+ },
+};
+
+module_platform_driver(mtk_ddp_driver);
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp.h
b/drivers/gpu/drm/mediatek/mtk_drm_ddp.h
new file mode 100644
index 0000000..92c1175
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef MTK_DRM_DDP_H
+#define MTK_DRM_DDP_H
+
+#include "mtk_drm_ddp_comp.h"
+
+struct regmap;
+struct device;
+struct mtk_disp_mutex;
+
+void mtk_ddp_add_comp_to_path(void __iomem *config_regs,
+ enum mtk_ddp_comp_id cur,
+ enum mtk_ddp_comp_id next);
+void mtk_ddp_remove_comp_from_path(void __iomem *config_regs,
+ enum mtk_ddp_comp_id cur,
+ enum mtk_ddp_comp_id next);
+
+struct mtk_disp_mutex *mtk_disp_mutex_get(struct device *dev, unsigned int id);
+int mtk_disp_mutex_prepare(struct mtk_disp_mutex *mutex);
+void mtk_disp_mutex_add_comp(struct mtk_disp_mutex *mutex,
+ enum mtk_ddp_comp_id id);
+void mtk_disp_mutex_enable(struct mtk_disp_mutex *mutex);
+void mtk_disp_mutex_disable(struct mtk_disp_mutex *mutex);
+void mtk_disp_mutex_remove_comp(struct mtk_disp_mutex *mutex,
+ enum mtk_ddp_comp_id id);
+void mtk_disp_mutex_unprepare(struct mtk_disp_mutex *mutex);
+void mtk_disp_mutex_put(struct mtk_disp_mutex *mutex);
+
+#endif /* MTK_DRM_DDP_H */
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
new file mode 100644
index 0000000..2b96f6b
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -0,0 +1,275 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Authors:
+ * YT Shen <yt.s...@mediatek.com>
+ * CK Hu <ck...@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <drm/drmP.h>
+#include "mtk_drm_drv.h"
+#include "mtk_drm_plane.h"
+#include "mtk_drm_ddp_comp.h"
+
+#define DISP_REG_RDMA_INT_ENABLE 0x0000
+#define DISP_REG_RDMA_INT_STATUS 0x0004
+#define DISP_REG_RDMA_GLOBAL_CON 0x0010
+#define DISP_REG_RDMA_SIZE_CON_0 0x0014
+#define DISP_REG_RDMA_SIZE_CON_1 0x0018
+#define DISP_REG_RDMA_FIFO_CON 0x0040
+#define RDMA_FIFO_UNDERFLOW_EN BIT(31)
+#define RDMA_FIFO_PSEUDO_SIZE(bytes) (((bytes) / 16) << 16)
+#define RDMA_OUTPUT_VALID_FIFO_THRESHOLD(bytes) ((bytes) / 16)
+
+#define DISP_OD_EN 0x0000
+#define DISP_OD_INTEN 0x0008
+#define DISP_OD_INTSTA 0x000c
+#define DISP_OD_CFG 0x0020
+#define DISP_OD_SIZE 0x0030
+
+#define DISP_REG_UFO_START 0x0000
+
+#define DISP_COLOR_CFG_MAIN 0x0400
+#define DISP_COLOR_START 0x0c00
+#define DISP_COLOR_WIDTH 0x0c50
+#define DISP_COLOR_HEIGHT 0x0c54
+
+#define OD_RELAY_MODE BIT(0)
+
+#define UFO_BYPASS BIT(2)
+
+#define COLOR_BYPASS_ALL BIT(7)
+#define COLOR_SEQ_SEL BIT(13)
+
+static void mtk_color_config(struct mtk_ddp_comp *comp, unsigned int w,
+ unsigned int h, unsigned int vrefresh)
+{
+ writel(w, comp->regs + DISP_COLOR_WIDTH);
+ writel(h, comp->regs + DISP_COLOR_HEIGHT);
+}
+
+static void mtk_color_start(struct mtk_ddp_comp *comp)
+{
+ writel(COLOR_BYPASS_ALL | COLOR_SEQ_SEL,
+ comp->regs + DISP_COLOR_CFG_MAIN);
+ writel(0x1, comp->regs + DISP_COLOR_START);
+}
+
+static void mtk_od_config(struct mtk_ddp_comp *comp, unsigned int w,
+ unsigned int h, unsigned int vrefresh)
+{
+ writel(w << 16 | h, comp->regs + DISP_OD_SIZE);
+}
+
+static void mtk_od_start(struct mtk_ddp_comp *comp)
+{
+ writel(OD_RELAY_MODE, comp->regs + DISP_OD_CFG);
+ writel(1, comp->regs + DISP_OD_EN);
+}
+
+static void mtk_rdma_start(struct mtk_ddp_comp *comp)
+{
+ unsigned int reg;
+
+ writel(0x4, comp->regs + DISP_REG_RDMA_INT_ENABLE);
+ reg = readl(comp->regs + DISP_REG_RDMA_GLOBAL_CON);
+ reg |= 1;
+ writel(reg, comp->regs + DISP_REG_RDMA_GLOBAL_CON);
+}
+
+static void mtk_rdma_config(struct mtk_ddp_comp *comp, unsigned width,
+ unsigned height, unsigned int vrefresh)
+{
+ unsigned int threshold;
+ unsigned int reg;
+
+ reg = readl(comp->regs + DISP_REG_RDMA_SIZE_CON_0);
+ reg = (reg & ~(0xfff)) | (width & 0xfff);
+ writel(reg, comp->regs + DISP_REG_RDMA_SIZE_CON_0);
+
+ reg = readl(comp->regs + DISP_REG_RDMA_SIZE_CON_1);
+ reg = (reg & ~(0xfffff)) | (height & 0xfffff);
+ writel(reg, comp->regs + DISP_REG_RDMA_SIZE_CON_1);
+
+ /*
+ * Enable FIFO underflow since DSI and DPI can't be blocked.
+ * Keep the FIFO pseudo size reset default of 8 KiB. Set the
+ * output threshold to 6 microseconds with 7/6 overhead to
+ * account for blanking, and with a pixel depth of 4 bytes:
+ */
+ threshold = width * height * vrefresh * 4 * 7 / 1000000;
+ reg = RDMA_FIFO_UNDERFLOW_EN |
+ RDMA_FIFO_PSEUDO_SIZE(SZ_8K) |
+ RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold);
+ writel(reg, comp->regs + DISP_REG_RDMA_FIFO_CON);
+}
+
+static void mtk_ufoe_start(struct mtk_ddp_comp *comp)
+{
+ writel(UFO_BYPASS, comp->regs + DISP_REG_UFO_START);
+}
+
+static const struct mtk_ddp_comp_funcs ddp_color = {
+ .config = mtk_color_config,
+ .start = mtk_color_start,
+};
+
+static const struct mtk_ddp_comp_funcs ddp_od = {
+ .config = mtk_od_config,
+ .start = mtk_od_start,
+};
+
+static const struct mtk_ddp_comp_funcs ddp_rdma = {
+ .config = mtk_rdma_config,
+ .start = mtk_rdma_start,
+};
+
+static const struct mtk_ddp_comp_funcs ddp_ufoe = {
+ .start = mtk_ufoe_start,
+};
+
+static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
+ [MTK_DISP_OVL] = "ovl",
+ [MTK_DISP_RDMA] = "rdma",
+ [MTK_DISP_WDMA] = "wdma",
+ [MTK_DISP_COLOR] = "color",
+ [MTK_DISP_AAL] = "aal",
+ [MTK_DISP_GAMMA] = "gamma",
+ [MTK_DISP_UFOE] = "ufoe",
+ [MTK_DSI] = "dsi",
+ [MTK_DPI] = "dpi",
+ [MTK_DISP_PWM] = "pwm",
+ [MTK_DISP_MUTEX] = "mutex",
+ [MTK_DISP_OD] = "od",
+};
+
+struct mtk_ddp_comp_match {
+ enum mtk_ddp_comp_type type;
+ int alias_id;
+ const struct mtk_ddp_comp_funcs *funcs;
+};
+
+static struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
+ [DDP_COMPONENT_AAL] = { MTK_DISP_AAL, 0, NULL },
+ [DDP_COMPONENT_COLOR0] = { MTK_DISP_COLOR, 0, &ddp_color },
+ [DDP_COMPONENT_COLOR1] = { MTK_DISP_COLOR, 1, &ddp_color },
+ [DDP_COMPONENT_DPI0] = { MTK_DPI, 0, NULL },
+ [DDP_COMPONENT_DSI0] = { MTK_DSI, 0, NULL },
+ [DDP_COMPONENT_DSI1] = { MTK_DSI, 1, NULL },
+ [DDP_COMPONENT_GAMMA] = { MTK_DISP_GAMMA, 0, NULL },
+ [DDP_COMPONENT_OD] = { MTK_DISP_OD, 0, &ddp_od },
+ [DDP_COMPONENT_OVL0] = { MTK_DISP_OVL, 0, NULL },
+ [DDP_COMPONENT_OVL1] = { MTK_DISP_OVL, 1, NULL },
+ [DDP_COMPONENT_PWM0] = { MTK_DISP_PWM, 0, NULL },
+ [DDP_COMPONENT_RDMA0] = { MTK_DISP_RDMA, 0, &ddp_rdma },
+ [DDP_COMPONENT_RDMA1] = { MTK_DISP_RDMA, 1, &ddp_rdma },
+ [DDP_COMPONENT_RDMA2] = { MTK_DISP_RDMA, 2, &ddp_rdma },
+ [DDP_COMPONENT_UFOE] = { MTK_DISP_UFOE, 0, &ddp_ufoe },
+ [DDP_COMPONENT_WDMA0] = { MTK_DISP_WDMA, 0, NULL },
+ [DDP_COMPONENT_WDMA1] = { MTK_DISP_WDMA, 1, NULL },
+};
+
+int mtk_ddp_comp_get_id(struct device_node *node,
+ enum mtk_ddp_comp_type comp_type)
+{
+ int id = of_alias_get_id(node, mtk_ddp_comp_stem[comp_type]);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mtk_ddp_matches); i++) {
+ if (comp_type == mtk_ddp_matches[i].type &&
+ (id < 0 || id == mtk_ddp_matches[i].alias_id))
+ return i;
+ }
+
+ return -EINVAL;
+}
+
+int mtk_ddp_comp_init(struct device *dev, struct device_node *node,
+ struct mtk_ddp_comp *comp, enum mtk_ddp_comp_id comp_id,
+ const struct mtk_ddp_comp_funcs *funcs)
+{
+ enum mtk_ddp_comp_type type;
+ struct device_node *larb_node;
+ struct platform_device *larb_pdev;
+
+ if (comp_id < 0 || comp_id >= DDP_COMPONENT_ID_MAX)
+ return -EINVAL;
+
+ comp->id = comp_id;
+ comp->funcs = funcs ?: mtk_ddp_matches[comp_id].funcs;
+
+ if (comp_id == DDP_COMPONENT_DPI0 ||
+ comp_id == DDP_COMPONENT_DSI0 ||
+ comp_id == DDP_COMPONENT_PWM0) {
+ comp->regs = NULL;
+ comp->clk = NULL;
+ comp->irq = 0;
+ return 0;
+ }
+
+ comp->regs = of_iomap(node, 0);
+ comp->irq = of_irq_get(node, 0);
+ comp->clk = of_clk_get(node, 0);
+ if (IS_ERR(comp->clk))
+ comp->clk = NULL;
+
+ type = mtk_ddp_matches[comp_id].type;
+
+ /* Only DMA capable components need the LARB property */
+ comp->larb_dev = NULL;
+ if (type != MTK_DISP_OVL &&
+ type != MTK_DISP_RDMA &&
+ type != MTK_DISP_WDMA)
+ return 0;
+
+ larb_node = of_parse_phandle(node, "mediatek,larb", 0);
+ if (!larb_node) {
+ dev_err(dev,
+ "Missing mediadek,larb phandle in %s node\n",
+ node->full_name);
+ return -EINVAL;
+ }
+
+ larb_pdev = of_find_device_by_node(larb_node);
+ if (!larb_pdev) {
+ dev_warn(dev, "Waiting for larb device %s\n",
+ larb_node->full_name);
+ return -EPROBE_DEFER;
+ }
+
+ comp->larb_dev = &larb_pdev->dev;
+
+ return 0;
+}
+
+int mtk_ddp_comp_register(struct drm_device *drm, struct mtk_ddp_comp *comp)
+{
+ struct mtk_drm_private *private = drm->dev_private;
+
+ if (private->ddp_comp[comp->id])
+ return -EBUSY;
+
+ private->ddp_comp[comp->id] = comp;
+ return 0;
+}
+
+void mtk_ddp_comp_unregister(struct drm_device *drm, struct mtk_ddp_comp *comp)
+{
+ struct mtk_drm_private *private = drm->dev_private;
+
+ private->ddp_comp[comp->id] = NULL;
+}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
new file mode 100644
index 0000000..bd0c065
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef MTK_DRM_DDP_COMP_H
+#define MTK_DRM_DDP_COMP_H
+
+#include <linux/io.h>
+
+struct device;
+struct device_node;
+struct drm_device;
+struct mtk_plane_state;
+
+enum mtk_ddp_comp_type {
+ MTK_DISP_OVL,
+ MTK_DISP_RDMA,
+ MTK_DISP_WDMA,
+ MTK_DISP_COLOR,
+ MTK_DISP_AAL,
+ MTK_DISP_GAMMA,
+ MTK_DISP_UFOE,
+ MTK_DSI,
+ MTK_DPI,
+ MTK_DISP_PWM,
+ MTK_DISP_MUTEX,
+ MTK_DISP_OD,
+ MTK_DDP_COMP_TYPE_MAX,
+};
+
+enum mtk_ddp_comp_id {
+ DDP_COMPONENT_AAL,
+ DDP_COMPONENT_COLOR0,
+ DDP_COMPONENT_COLOR1,
+ DDP_COMPONENT_DPI0,
+ DDP_COMPONENT_DSI0,
+ DDP_COMPONENT_DSI1,
+ DDP_COMPONENT_GAMMA,
+ DDP_COMPONENT_OD,
+ DDP_COMPONENT_OVL0,
+ DDP_COMPONENT_OVL1,
+ DDP_COMPONENT_PWM0,
+ DDP_COMPONENT_PWM1,
+ DDP_COMPONENT_RDMA0,
+ DDP_COMPONENT_RDMA1,
+ DDP_COMPONENT_RDMA2,
+ DDP_COMPONENT_UFOE,
+ DDP_COMPONENT_WDMA0,
+ DDP_COMPONENT_WDMA1,
+ DDP_COMPONENT_ID_MAX,
+};
+
+struct mtk_ddp_comp;
+
+struct mtk_ddp_comp_funcs {
+ void (*config)(struct mtk_ddp_comp *comp, unsigned int w,
+ unsigned int h, unsigned int vrefresh);
+ void (*start)(struct mtk_ddp_comp *comp);
+ void (*stop)(struct mtk_ddp_comp *comp);
+ void (*enable_vblank)(struct mtk_ddp_comp *comp);
+ void (*disable_vblank)(struct mtk_ddp_comp *comp);
+ void (*layer_on)(struct mtk_ddp_comp *comp, unsigned int idx);
+ void (*layer_off)(struct mtk_ddp_comp *comp, unsigned int idx);
+ void (*layer_config)(struct mtk_ddp_comp *comp, unsigned int idx,
+ struct mtk_plane_state *state);
+};
+
+struct mtk_ddp_comp {
+ struct clk *clk;
+ void __iomem *regs;
+ int irq;
+ struct device *larb_dev;
+ enum mtk_ddp_comp_id id;
+ const struct mtk_ddp_comp_funcs *funcs;
+};
+
+static inline void mtk_ddp_comp_config(struct mtk_ddp_comp *comp,
+ unsigned int w, unsigned int h,
+ unsigned int vrefresh)
+{
+ if (comp->funcs && comp->funcs->config)
+ comp->funcs->config(comp, w, h, vrefresh);
+}
+
+static inline void mtk_ddp_comp_start(struct mtk_ddp_comp *comp)
+{
+ if (comp->funcs && comp->funcs->start)
+ comp->funcs->start(comp);
+}
+
+static inline void mtk_ddp_comp_stop(struct mtk_ddp_comp *comp)
+{
+ if (comp->funcs && comp->funcs->stop)
+ comp->funcs->stop(comp);
+}
+
+static inline void mtk_ddp_comp_enable_vblank(struct mtk_ddp_comp *comp)
+{
+ if (comp->funcs && comp->funcs->enable_vblank)
+ comp->funcs->enable_vblank(comp);
+}
+
+static inline void mtk_ddp_comp_disable_vblank(struct mtk_ddp_comp *comp)
+{
+ if (comp->funcs && comp->funcs->disable_vblank)
+ comp->funcs->disable_vblank(comp);
+}
+
+static inline void mtk_ddp_comp_layer_on(struct mtk_ddp_comp *comp,
+ unsigned int idx)
+{
+ if (comp->funcs && comp->funcs->layer_on)
+ comp->funcs->layer_on(comp, idx);
+}
+
+static inline void mtk_ddp_comp_layer_off(struct mtk_ddp_comp *comp,
+ unsigned int idx)
+{
+ if (comp->funcs && comp->funcs->layer_off)
+ comp->funcs->layer_off(comp, idx);
+}
+
+static inline void mtk_ddp_comp_layer_config(struct mtk_ddp_comp *comp,
+ unsigned int idx,
+ struct mtk_plane_state *state)
+{
+ if (comp->funcs && comp->funcs->layer_config)
+ comp->funcs->layer_config(comp, idx, state);
+}
+
+int mtk_ddp_comp_get_id(struct device_node *node,
+ enum mtk_ddp_comp_type comp_type);
+int mtk_ddp_comp_init(struct device *dev, struct device_node *comp_node,
+ struct mtk_ddp_comp *comp, enum mtk_ddp_comp_id comp_id,
+ const struct mtk_ddp_comp_funcs *funcs);
+int mtk_ddp_comp_register(struct drm_device *drm, struct mtk_ddp_comp *comp);
+void mtk_ddp_comp_unregister(struct drm_device *drm, struct mtk_ddp_comp
*comp);
+
+#endif /* MTK_DRM_DDP_COMP_H */
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
new file mode 100644
index 0000000..9db22b4
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -0,0 +1,577 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: YT SHEN <yt.s...@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_gem.h>
+#include <linux/component.h>
+#include <linux/iommu.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+
+#include "mtk_drm_crtc.h"
+#include "mtk_drm_ddp.h"
+#include "mtk_drm_ddp_comp.h"
+#include "mtk_drm_drv.h"
+#include "mtk_drm_fb.h"
+#include "mtk_drm_gem.h"
+
+#define DRIVER_NAME "mediatek"
+#define DRIVER_DESC "Mediatek SoC DRM"
+#define DRIVER_DATE "20150513"
+#define DRIVER_MAJOR 1
+#define DRIVER_MINOR 0
+
+static void mtk_atomic_schedule(struct mtk_drm_private *private,
+ struct drm_atomic_state *state)
+{
+ private->commit.state = state;
+ schedule_work(&private->commit.work);
+}
+
+static void mtk_atomic_wait_for_fences(struct drm_atomic_state *state)
+{
+ struct drm_plane *plane;
+ struct drm_plane_state *plane_state;
+ int i;
+
+ for_each_plane_in_state(state, plane, plane_state, i)
+ mtk_fb_wait(plane->state->fb);
+}
+
+static void mtk_atomic_complete(struct mtk_drm_private *private,
+ struct drm_atomic_state *state)
+{
+ struct drm_device *drm = private->drm;
+
+ mtk_atomic_wait_for_fences(state);
+
+ drm_atomic_helper_commit_modeset_disables(drm, state);
+ drm_atomic_helper_commit_planes(drm, state, false);
+ drm_atomic_helper_commit_modeset_enables(drm, state);
+ drm_atomic_helper_wait_for_vblanks(drm, state);
+ drm_atomic_helper_cleanup_planes(drm, state);
+ drm_atomic_state_free(state);
+}
+
+static void mtk_atomic_work(struct work_struct *work)
+{
+ struct mtk_drm_private *private = container_of(work,
+ struct mtk_drm_private, commit.work);
+
+ mtk_atomic_complete(private, private->commit.state);
+}
+
+static int mtk_atomic_commit(struct drm_device *drm,
+ struct drm_atomic_state *state,
+ bool async)
+{
+ struct mtk_drm_private *private = drm->dev_private;
+ int ret;
+
+ ret = drm_atomic_helper_prepare_planes(drm, state);
+ if (ret)
+ return ret;
+
+ mutex_lock(&private->commit.lock);
+ flush_work(&private->commit.work);
+
+ drm_atomic_helper_swap_state(drm, state);
+
+ if (async)
+ mtk_atomic_schedule(private, state);
+ else
+ mtk_atomic_complete(private, state);
+
+ mutex_unlock(&private->commit.lock);
+
+ return 0;
+}
+
+static const struct drm_mode_config_funcs mtk_drm_mode_config_funcs = {
+ .fb_create = mtk_drm_mode_fb_create,
+ .atomic_check = drm_atomic_helper_check,
+ .atomic_commit = mtk_atomic_commit,
+};
+
+static const enum mtk_ddp_comp_id mtk_ddp_main[] = {
+ DDP_COMPONENT_OVL0,
+ DDP_COMPONENT_COLOR0,
+ DDP_COMPONENT_AAL,
+ DDP_COMPONENT_OD,
+ DDP_COMPONENT_RDMA0,
+ DDP_COMPONENT_UFOE,
+ DDP_COMPONENT_DSI0,
+ DDP_COMPONENT_PWM0,
+};
+
+static const enum mtk_ddp_comp_id mtk_ddp_ext[] = {
+ DDP_COMPONENT_OVL1,
+ DDP_COMPONENT_COLOR1,
+ DDP_COMPONENT_GAMMA,
+ DDP_COMPONENT_RDMA1,
+ DDP_COMPONENT_DPI0,
+};
+
+static int mtk_drm_kms_init(struct drm_device *drm)
+{
+ struct mtk_drm_private *private = drm->dev_private;
+ struct platform_device *pdev;
+ int ret;
+
+ if (!iommu_present(&platform_bus_type))
+ return -EPROBE_DEFER;
+
+ pdev = of_find_device_by_node(private->mutex_node);
+ if (!pdev) {
+ dev_err(drm->dev, "Waiting for disp-mutex device %s\n",
+ private->mutex_node->full_name);
+ of_node_put(private->mutex_node);
+ return -EPROBE_DEFER;
+ }
+ private->mutex_dev = &pdev->dev;
+
+ drm_mode_config_init(drm);
+
+ drm->mode_config.min_width = 64;
+ drm->mode_config.min_height = 64;
+
+ /*
+ * set max width and height as default value(4096x4096).
+ * this value would be used to check framebuffer size limitation
+ * at drm_mode_addfb().
+ */
+ drm->mode_config.max_width = 4096;
+ drm->mode_config.max_height = 4096;
+ drm->mode_config.funcs = &mtk_drm_mode_config_funcs;
+
+ ret = component_bind_all(drm->dev, drm);
+ if (ret)
+ goto err_config_cleanup;
+
+ /*
+ * We currently support two fixed data streams, each statically
+ * assigned to a crtc:
+ * OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 ...
+ */
+ ret = mtk_drm_crtc_create(drm, mtk_ddp_main, ARRAY_SIZE(mtk_ddp_main));
+ if (ret < 0)
+ goto err_component_unbind;
+ /* ... and OVL1 -> COLOR1 -> GAMMA -> RDMA1 -> DPI0. */
+ ret = mtk_drm_crtc_create(drm, mtk_ddp_ext, ARRAY_SIZE(mtk_ddp_ext));
+ if (ret < 0)
+ goto err_component_unbind;
+
+ /*
+ * We don't use the drm_irq_install() helpers provided by the DRM
+ * core, so we need to set this manually in order to allow the
+ * DRM_IOCTL_WAIT_VBLANK to operate correctly.
+ */
+ drm->irq_enabled = true;
+ ret = drm_vblank_init(drm, MAX_CRTC);
+ if (ret < 0)
+ goto err_component_unbind;
+
+ drm_kms_helper_poll_init(drm);
+ drm_mode_config_reset(drm);
+
+ return 0;
+
+err_component_unbind:
+ component_unbind_all(drm->dev, drm);
+err_config_cleanup:
+ drm_mode_config_cleanup(drm);
+
+ return ret;
+}
+
+static void mtk_drm_kms_deinit(struct drm_device *drm)
+{
+ drm_kms_helper_poll_fini(drm);
+
+ drm_vblank_cleanup(drm);
+ component_unbind_all(drm->dev, drm);
+ drm_mode_config_cleanup(drm);
+}
+
+static int mtk_drm_unload(struct drm_device *drm)
+{
+ mtk_drm_kms_deinit(drm);
+ drm->dev_private = NULL;
+
+ return 0;
+}
+
+static const struct vm_operations_struct mtk_drm_gem_vm_ops = {
+ .open = drm_gem_vm_open,
+ .close = drm_gem_vm_close,
+};
+
+static const struct file_operations mtk_drm_fops = {
+ .owner = THIS_MODULE,
+ .open = drm_open,
+ .release = drm_release,
+ .unlocked_ioctl = drm_ioctl,
+ .mmap = mtk_drm_gem_mmap,
+ .poll = drm_poll,
+ .read = drm_read,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = drm_compat_ioctl,
+#endif
+};
+
+static struct drm_driver mtk_drm_driver = {
+ .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME |
+ DRIVER_ATOMIC,
+ .unload = mtk_drm_unload,
+ .set_busid = drm_platform_set_busid,
+
+ .get_vblank_counter = drm_vblank_count,
+ .enable_vblank = mtk_drm_crtc_enable_vblank,
+ .disable_vblank = mtk_drm_crtc_disable_vblank,
+
+ .gem_free_object = mtk_drm_gem_free_object,
+ .gem_vm_ops = &mtk_drm_gem_vm_ops,
+ .dumb_create = mtk_drm_gem_dumb_create,
+ .dumb_map_offset = mtk_drm_gem_dumb_map_offset,
+ .dumb_destroy = drm_gem_dumb_destroy,
+
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_export = drm_gem_prime_export,
+ .gem_prime_import = drm_gem_prime_import,
+ .gem_prime_get_sg_table = mtk_gem_prime_get_sg_table,
+ .gem_prime_mmap = mtk_drm_gem_mmap_buf,
+ .fops = &mtk_drm_fops,
+
+ .name = DRIVER_NAME,
+ .desc = DRIVER_DESC,
+ .date = DRIVER_DATE,
+ .major = DRIVER_MAJOR,
+ .minor = DRIVER_MINOR,
+};
+
+static int compare_of(struct device *dev, void *data)
+{
+ return dev->of_node == data;
+}
+
+static int mtk_drm_bind(struct device *dev)
+{
+ struct mtk_drm_private *private = dev_get_drvdata(dev);
+ struct drm_device *drm;
+ int ret;
+
+ drm = drm_dev_alloc(&mtk_drm_driver, dev);
+ if (!drm)
+ return -ENOMEM;
+
+ drm_dev_set_unique(drm, dev_name(dev));
+
+ ret = drm_dev_register(drm, 0);
+ if (ret < 0)
+ goto err_free;
+
+ drm->dev_private = private;
+ private->drm = drm;
+
+ ret = mtk_drm_kms_init(drm);
+ if (ret < 0)
+ goto err_unregister;
+
+ return 0;
+
+err_unregister:
+ drm_dev_unregister(drm);
+err_free:
+ drm_dev_unref(drm);
+ return ret;
+}
+
+static void mtk_drm_unbind(struct device *dev)
+{
+ struct mtk_drm_private *private = dev_get_drvdata(dev);
+
+ drm_put_dev(private->drm);
+ private->drm = NULL;
+}
+
+static const struct component_master_ops mtk_drm_ops = {
+ .bind = mtk_drm_bind,
+ .unbind = mtk_drm_unbind,
+};
+
+static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
+ { .compatible = "mediatek,mt8173-disp-ovl", .data = (void
*)MTK_DISP_OVL },
+ { .compatible = "mediatek,mt8173-disp-rdma", .data = (void
*)MTK_DISP_RDMA },
+ { .compatible = "mediatek,mt8173-disp-wdma", .data = (void
*)MTK_DISP_WDMA },
+ { .compatible = "mediatek,mt8173-disp-color", .data = (void
*)MTK_DISP_COLOR },
+ { .compatible = "mediatek,mt8173-disp-aal", .data = (void
*)MTK_DISP_AAL},
+ { .compatible = "mediatek,mt8173-disp-gamma", .data = (void
*)MTK_DISP_GAMMA, },
+ { .compatible = "mediatek,mt8173-disp-ufoe", .data = (void
*)MTK_DISP_UFOE },
+ { .compatible = "mediatek,mt8173-dsi", .data = (void *)MTK_DSI },
+ { .compatible = "mediatek,mt8173-dpi", .data = (void *)MTK_DPI },
+ { .compatible = "mediatek,mt8173-disp-mutex", .data = (void
*)MTK_DISP_MUTEX },
+ { .compatible = "mediatek,mt8173-disp-pwm", .data = (void
*)MTK_DISP_PWM },
+ { .compatible = "mediatek,mt8173-disp-od", .data = (void
*)MTK_DISP_OD },
+ { }
+};
+
+static int mtk_drm_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mtk_drm_private *private;
+ struct resource *mem;
+ struct device_node *node;
+ struct component_match *match = NULL;
+ int ret;
+ int i;
+
+ private = devm_kzalloc(dev, sizeof(*private), GFP_KERNEL);
+ if (!private)
+ return -ENOMEM;
+
+ mutex_init(&private->commit.lock);
+ INIT_WORK(&private->commit.work, mtk_atomic_work);
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ private->config_regs = devm_ioremap_resource(dev, mem);
+ if (IS_ERR(private->config_regs)) {
+ ret = PTR_ERR(private->config_regs);
+ dev_err(dev, "Failed to ioremap mmsys-config resource: %d\n",
+ ret);
+ return ret;
+ }
+
+ /* Iterate over sibling DISP function blocks */
+ for_each_child_of_node(dev->of_node->parent, node) {
+ const struct of_device_id *of_id;
+ enum mtk_ddp_comp_type comp_type;
+ int comp_id;
+
+ of_id = of_match_node(mtk_ddp_comp_dt_ids, node);
+ if (!of_id)
+ continue;
+
+ if (!of_device_is_available(node)) {
+ dev_dbg(dev, "Skipping disabled component %s\n",
+ node->full_name);
+ continue;
+ }
+
+ comp_type = (enum mtk_ddp_comp_type)of_id->data;
+
+ if (comp_type == MTK_DISP_MUTEX) {
+ private->mutex_node = of_node_get(node);
+ continue;
+ }
+
+ comp_id = mtk_ddp_comp_get_id(node, comp_type);
+ if (comp_id < 0) {
+ dev_warn(dev, "Skipping unknown component %s\n",
+ node->full_name);
+ continue;
+ }
+
+ private->comp_node[comp_id] = of_node_get(node);
+
+ /*
+ * Currently only the OVL, DSI, and DPI blocks have separate
+ * component platform drivers and initialize their own DDP
+ * component structure. The others are initialized here.
+ */
+ if (comp_type == MTK_DISP_OVL ||
+ comp_type == MTK_DSI ||
+ comp_type == MTK_DPI) {
+ dev_info(dev, "Adding component match for %s\n",
+ node->full_name);
+ component_match_add(dev, &match, compare_of, node);
+ } else {
+ struct mtk_ddp_comp *comp;
+
+ comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
+ if (!comp) {
+ ret = -ENOMEM;
+ goto err_node;
+ }
+
+ ret = mtk_ddp_comp_init(dev, node, comp, comp_id, NULL);
+ if (ret)
+ goto err_node;
+
+ private->ddp_comp[comp_id] = comp;
+ }
+ }
+
+ if (!private->mutex_node) {
+ dev_err(dev, "Failed to find disp-mutex node\n");
+ ret = -ENODEV;
+ goto err_node;
+ }
+
+ pm_runtime_enable(dev);
+
+ platform_set_drvdata(pdev, private);
+
+ ret = component_master_add_with_match(dev, &mtk_drm_ops, match);
+ if (ret)
+ goto err_pm;
+
+ return 0;
+
+err_pm:
+ pm_runtime_disable(dev);
+err_node:
+ of_node_put(private->mutex_node);
+ for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
+ of_node_put(private->comp_node[i]);
+ return ret;
+}
+
+static int mtk_drm_remove(struct platform_device *pdev)
+{
+ struct mtk_drm_private *private = platform_get_drvdata(pdev);
+ int i;
+
+ component_master_del(&pdev->dev, &mtk_drm_ops);
+ pm_runtime_disable(&pdev->dev);
+ of_node_put(private->mutex_node);
+ for (i = 0; i < DDP_COMPONENT_ID_MAX; i++)
+ of_node_put(private->comp_node[i]);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int mtk_drm_sys_suspend(struct device *dev)
+{
+ struct mtk_drm_private *private = dev_get_drvdata(dev);
+ struct drm_device *drm = private->drm;
+ struct drm_connector *conn;
+
+ drm_kms_helper_poll_disable(drm);
+
+ drm_modeset_lock_all(drm);
+ list_for_each_entry(conn, &drm->mode_config.connector_list, head) {
+ int old_dpms = conn->dpms;
+
+ if (conn->funcs->dpms)
+ conn->funcs->dpms(conn, DRM_MODE_DPMS_OFF);
+
+ /* Set the old mode back to the connector for resume */
+ conn->dpms = old_dpms;
+ }
+ drm_modeset_unlock_all(drm);
+
+ DRM_DEBUG_DRIVER("mtk_drm_sys_suspend\n");
+ return 0;
+}
+
+static int mtk_drm_sys_resume(struct device *dev)
+{
+ struct mtk_drm_private *private = dev_get_drvdata(dev);
+ struct drm_device *drm = private->drm;
+ struct drm_connector *conn;
+
+ drm_modeset_lock_all(drm);
+ list_for_each_entry(conn, &drm->mode_config.connector_list, head) {
+ int desired_mode = conn->dpms;
+
+ /*
+ * at suspend time, we save dpms to connector->dpms,
+ * restore the old_dpms, and at current time, the connector
+ * dpms status must be DRM_MODE_DPMS_OFF.
+ */
+ conn->dpms = DRM_MODE_DPMS_OFF;
+
+ /*
+ * If the connector has been disconnected during suspend,
+ * disconnect it from the encoder and leave it off. We'll notify
+ * userspace at the end.
+ */
+ if (conn->funcs->dpms)
+ conn->funcs->dpms(conn, desired_mode);
+ }
+ drm_modeset_unlock_all(drm);
+
+ drm_kms_helper_poll_enable(drm);
+
+ DRM_DEBUG_DRIVER("mtk_drm_sys_resume\n");
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(mtk_drm_pm_ops, mtk_drm_sys_suspend,
+ mtk_drm_sys_resume);
+
+static const struct of_device_id mtk_drm_of_ids[] = {
+ { .compatible = "mediatek,mt8173-mmsys", },
+ { }
+};
+
+static struct platform_driver mtk_drm_platform_driver = {
+ .probe = mtk_drm_probe,
+ .remove = mtk_drm_remove,
+ .driver = {
+ .name = "mediatek-drm",
+ .of_match_table = mtk_drm_of_ids,
+ .pm = &mtk_drm_pm_ops,
+ },
+};
+
+static struct platform_driver * const mtk_drm_drivers[] = {
+ &mtk_drm_platform_driver,
+ &mtk_disp_ovl_driver,
+};
+
+static int __init mtk_drm_init(void)
+{
+ int ret;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mtk_drm_drivers); i++) {
+ ret = platform_driver_register(mtk_drm_drivers[i]);
+ if (ret < 0) {
+ pr_err("Failed to register %s driver: %d\n",
+ mtk_drm_drivers[i]->driver.name, ret);
+ goto err;
+ }
+ }
+
+ return 0;
+
+err:
+ while (--i >= 0)
+ platform_driver_unregister(mtk_drm_drivers[i]);
+
+ return ret;
+}
+
+static void __exit mtk_drm_exit(void)
+{
+ int i;
+
+ for (i = ARRAY_SIZE(mtk_drm_drivers) - 1; i >= 0; i--)
+ platform_driver_unregister(mtk_drm_drivers[i]);
+}
+
+module_init(mtk_drm_init);
+module_exit(mtk_drm_exit);
+
+MODULE_AUTHOR("YT SHEN <yt.s...@mediatek.com>");
+MODULE_DESCRIPTION("Mediatek SoC DRM driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
new file mode 100644
index 0000000..75e1b7d
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef MTK_DRM_DRV_H
+#define MTK_DRM_DRV_H
+
+#include <linux/io.h>
+#include "mtk_drm_ddp_comp.h"
+
+#define MAX_CRTC 2
+#define MAX_CONNECTOR 2
+
+struct device;
+struct device_node;
+struct drm_crtc;
+struct drm_device;
+struct drm_fb_helper;
+struct drm_property;
+struct regmap;
+
+struct mtk_drm_private {
+ struct drm_device *drm;
+
+ struct drm_crtc *crtc[MAX_CRTC];
+ unsigned int num_pipes;
+
+ struct device_node *mutex_node;
+ struct device *mutex_dev;
+ void __iomem *config_regs;
+ struct device_node *comp_node[DDP_COMPONENT_ID_MAX];
+ struct mtk_ddp_comp *ddp_comp[DDP_COMPONENT_ID_MAX];
+
+ struct {
+ struct drm_atomic_state *state;
+ struct work_struct work;
+ struct mutex lock;
+ } commit;
+};
+
+extern struct platform_driver mtk_disp_ovl_driver;
+
+#endif /* MTK_DRM_DRV_H */
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fb.c
b/drivers/gpu/drm/mediatek/mtk_drm_fb.c
new file mode 100644
index 0000000..e1416cf
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_fb.c
@@ -0,0 +1,165 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_gem.h>
+#include <linux/dma-buf.h>
+#include <linux/reservation.h>
+
+#include "mtk_drm_drv.h"
+#include "mtk_drm_fb.h"
+#include "mtk_drm_gem.h"
+
+/*
+ * mtk specific framebuffer structure.
+ *
+ * @fb: drm framebuffer object.
+ * @gem_obj: array of gem objects.
+ */
+struct mtk_drm_fb {
+ struct drm_framebuffer base;
+ /* For now we only support a single plane */
+ struct drm_gem_object *gem_obj;
+};
+
+#define to_mtk_fb(x) container_of(x, struct mtk_drm_fb, base)
+
+struct drm_gem_object *mtk_fb_get_gem_obj(struct drm_framebuffer *fb)
+{
+ struct mtk_drm_fb *mtk_fb = to_mtk_fb(fb);
+
+ return mtk_fb->gem_obj;
+}
+
+static int mtk_drm_fb_create_handle(struct drm_framebuffer *fb,
+ struct drm_file *file_priv,
+ unsigned int *handle)
+{
+ struct mtk_drm_fb *mtk_fb = to_mtk_fb(fb);
+
+ return drm_gem_handle_create(file_priv, mtk_fb->gem_obj, handle);
+}
+
+static void mtk_drm_fb_destroy(struct drm_framebuffer *fb)
+{
+ struct mtk_drm_fb *mtk_fb = to_mtk_fb(fb);
+
+ drm_framebuffer_cleanup(fb);
+
+ drm_gem_object_unreference_unlocked(mtk_fb->gem_obj);
+
+ kfree(mtk_fb);
+}
+
+static const struct drm_framebuffer_funcs mtk_drm_fb_funcs = {
+ .create_handle = mtk_drm_fb_create_handle,
+ .destroy = mtk_drm_fb_destroy,
+};
+
+static struct mtk_drm_fb *mtk_drm_framebuffer_init(struct drm_device *dev,
+ struct drm_mode_fb_cmd2
*mode,
+ struct drm_gem_object *obj)
+{
+ struct mtk_drm_fb *mtk_fb;
+ int ret;
+
+ if (drm_format_num_planes(mode->pixel_format) != 1)
+ return ERR_PTR(-EINVAL);
+
+ mtk_fb = kzalloc(sizeof(*mtk_fb), GFP_KERNEL);
+ if (!mtk_fb)
+ return ERR_PTR(-ENOMEM);
+
+ drm_helper_mode_fill_fb_struct(&mtk_fb->base, mode);
+
+ mtk_fb->gem_obj = obj;
+
+ ret = drm_framebuffer_init(dev, &mtk_fb->base, &mtk_drm_fb_funcs);
+ if (ret) {
+ DRM_ERROR("failed to initialize framebuffer\n");
+ kfree(mtk_fb);
+ return ERR_PTR(ret);
+ }
+
+ return mtk_fb;
+}
+
+/*
+ * Wait for any exclusive fence in fb's gem object's reservation object.
+ *
+ * Returns -ERESTARTSYS if interrupted, else 0.
+ */
+int mtk_fb_wait(struct drm_framebuffer *fb)
+{
+ struct drm_gem_object *gem;
+ struct reservation_object *resv;
+ long ret;
+
+ if (!fb)
+ return 0;
+
+ gem = mtk_fb_get_gem_obj(fb);
+ if (!gem || !gem->dma_buf || !gem->dma_buf->resv)
+ return 0;
+
+ resv = gem->dma_buf->resv;
+ ret = reservation_object_wait_timeout_rcu(resv, false, true,
+ MAX_SCHEDULE_TIMEOUT);
+ /* MAX_SCHEDULE_TIMEOUT on success, -ERESTARTSYS if interrupted */
+ if (WARN_ON(ret < 0))
+ return ret;
+
+ return 0;
+}
+
+struct drm_framebuffer *mtk_drm_mode_fb_create(struct drm_device *dev,
+ struct drm_file *file,
+ struct drm_mode_fb_cmd2 *cmd)
+{
+ struct mtk_drm_fb *mtk_fb;
+ struct drm_gem_object *gem;
+ unsigned int width = cmd->width;
+ unsigned int height = cmd->height;
+ unsigned int size, bpp;
+ int ret;
+
+ if (drm_format_num_planes(cmd->pixel_format) != 1)
+ return ERR_PTR(-EINVAL);
+
+ gem = drm_gem_object_lookup(dev, file, cmd->handles[0]);
+ if (!gem)
+ return ERR_PTR(-ENOENT);
+
+ bpp = drm_format_plane_cpp(cmd->pixel_format, 0);
+ size = (height - 1) * cmd->pitches[0] + width * bpp;
+ size += cmd->offsets[0];
+
+ if (gem->size < size) {
+ ret = -EINVAL;
+ goto unreference;
+ }
+
+ mtk_fb = mtk_drm_framebuffer_init(dev, cmd, gem);
+ if (IS_ERR(mtk_fb)) {
+ ret = PTR_ERR(mtk_fb);
+ goto unreference;
+ }
+
+ return &mtk_fb->base;
+
+unreference:
+ drm_gem_object_unreference_unlocked(gem);
+ return ERR_PTR(ret);
+}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_fb.h
b/drivers/gpu/drm/mediatek/mtk_drm_fb.h
new file mode 100644
index 0000000..a89c7af
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_fb.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef MTK_DRM_FB_H
+#define MTK_DRM_FB_H
+
+#define MAX_FB_OBJ 3
+
+struct drm_gem_object *mtk_fb_get_gem_obj(struct drm_framebuffer *fb);
+int mtk_fb_wait(struct drm_framebuffer *fb);
+struct drm_framebuffer *mtk_drm_mode_fb_create(struct drm_device *dev,
+ struct drm_file *file,
+ struct drm_mode_fb_cmd2 *cmd);
+
+void mtk_drm_mode_output_poll_changed(struct drm_device *dev);
+int mtk_fbdev_create(struct drm_device *dev);
+void mtk_fbdev_destroy(struct drm_device *dev);
+
+#endif /* MTK_DRM_FB_H */
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.c
b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
new file mode 100644
index 0000000..96cc980
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.c
@@ -0,0 +1,227 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_gem.h>
+
+#include "mtk_drm_gem.h"
+
+static struct mtk_drm_gem_obj *mtk_drm_gem_init(struct drm_device *dev,
+ unsigned long size)
+{
+ struct mtk_drm_gem_obj *mtk_gem_obj;
+ int ret;
+
+ size = round_up(size, PAGE_SIZE);
+
+ mtk_gem_obj = kzalloc(sizeof(*mtk_gem_obj), GFP_KERNEL);
+ if (!mtk_gem_obj)
+ return ERR_PTR(-ENOMEM);
+
+ ret = drm_gem_object_init(dev, &mtk_gem_obj->base, size);
+ if (ret < 0) {
+ DRM_ERROR("failed to initialize gem object\n");
+ kfree(mtk_gem_obj);
+ return ERR_PTR(ret);
+ }
+
+ return mtk_gem_obj;
+}
+
+struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev,
+ unsigned long size, bool alloc_kmap)
+{
+ struct mtk_drm_gem_obj *mtk_gem;
+ struct drm_gem_object *obj;
+ int ret;
+
+ mtk_gem = mtk_drm_gem_init(dev, size);
+ if (IS_ERR(mtk_gem))
+ return ERR_CAST(mtk_gem);
+
+ obj = &mtk_gem->base;
+
+ init_dma_attrs(&mtk_gem->dma_attrs);
+ dma_set_attr(DMA_ATTR_WRITE_COMBINE, &mtk_gem->dma_attrs);
+
+ if (!alloc_kmap)
+ dma_set_attr(DMA_ATTR_NO_KERNEL_MAPPING, &mtk_gem->dma_attrs);
+
+ mtk_gem->cookie = dma_alloc_attrs(dev->dev, obj->size,
+ (dma_addr_t *)&mtk_gem->dma_addr, GFP_KERNEL,
+ &mtk_gem->dma_attrs);
+ if (!mtk_gem->cookie) {
+ DRM_ERROR("failed to allocate %zx byte dma buffer", obj->size);
+ ret = -ENOMEM;
+ goto err_gem_free;
+ }
+
+ if (alloc_kmap)
+ mtk_gem->kvaddr = mtk_gem->cookie;
+
+ DRM_DEBUG_DRIVER("cookie = %p dma_addr = %pad\n",
+ mtk_gem->cookie, &mtk_gem->dma_addr);
+
+ return mtk_gem;
+
+err_gem_free:
+ drm_gem_object_release(obj);
+ kfree(mtk_gem);
+ return ERR_PTR(ret);
+}
+
+void mtk_drm_gem_free_object(struct drm_gem_object *obj)
+{
+ struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
+
+ dma_free_attrs(obj->dev->dev, obj->size, mtk_gem->cookie,
+ mtk_gem->dma_addr, &mtk_gem->dma_attrs);
+
+ /* release file pointer to gem object. */
+ drm_gem_object_release(obj);
+
+ kfree(mtk_gem);
+}
+
+int mtk_drm_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
+ struct drm_mode_create_dumb *args)
+{
+ struct mtk_drm_gem_obj *mtk_gem;
+ int ret;
+
+ args->pitch = args->width * DIV_ROUND_UP(args->bpp, 8);
+ args->size = args->pitch * args->height;
+
+ mtk_gem = mtk_drm_gem_create(dev, args->size, false);
+ if (IS_ERR(mtk_gem))
+ return PTR_ERR(mtk_gem);
+
+ /*
+ * allocate a id of idr table where the obj is registered
+ * and handle has the id what user can see.
+ */
+ ret = drm_gem_handle_create(file_priv, &mtk_gem->base, &args->handle);
+ if (ret)
+ goto err_handle_create;
+
+ /* drop reference from allocate - handle holds it now. */
+ drm_gem_object_unreference_unlocked(&mtk_gem->base);
+
+ return 0;
+
+err_handle_create:
+ mtk_drm_gem_free_object(&mtk_gem->base);
+ return ret;
+}
+
+int mtk_drm_gem_dumb_map_offset(struct drm_file *file_priv,
+ struct drm_device *dev, uint32_t handle,
+ uint64_t *offset)
+{
+ struct drm_gem_object *obj;
+ int ret;
+
+ obj = drm_gem_object_lookup(dev, file_priv, handle);
+ if (!obj) {
+ DRM_ERROR("failed to lookup gem object.\n");
+ return -EINVAL;
+ }
+
+ ret = drm_gem_create_mmap_offset(obj);
+ if (ret)
+ goto out;
+
+ *offset = drm_vma_node_offset_addr(&obj->vma_node);
+ DRM_DEBUG_KMS("offset = 0x%llx\n", *offset);
+
+out:
+ drm_gem_object_unreference_unlocked(obj);
+ return ret;
+}
+
+static int mtk_drm_gem_object_mmap(struct drm_gem_object *obj,
+ struct vm_area_struct *vma)
+
+{
+ int ret;
+ struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
+ struct drm_device *drm = obj->dev;
+
+ /*
+ * dma_alloc_attrs() allocated a struct page table for mtk_gem, so clear
+ * VM_PFNMAP flag that was set by drm_gem_mmap_obj()/drm_gem_mmap().
+ */
+ vma->vm_flags &= ~VM_PFNMAP;
+ vma->vm_pgoff = 0;
+
+ ret = dma_mmap_attrs(drm->dev, vma, mtk_gem->cookie, mtk_gem->dma_addr,
+ obj->size, &mtk_gem->dma_attrs);
+ if (ret)
+ drm_gem_vm_close(vma);
+
+ return ret;
+}
+
+int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj, struct vm_area_struct
*vma)
+{
+ int ret;
+
+ ret = drm_gem_mmap_obj(obj, obj->size, vma);
+ if (ret)
+ return ret;
+
+ return mtk_drm_gem_object_mmap(obj, vma);
+}
+
+int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
+{
+ struct drm_gem_object *obj;
+ int ret;
+
+ ret = drm_gem_mmap(filp, vma);
+ if (ret)
+ return ret;
+
+ obj = vma->vm_private_data;
+
+ return mtk_drm_gem_object_mmap(obj, vma);
+}
+
+/*
+ * Allocate a sg_table for this GEM object.
+ * Note: Both the table's contents, and the sg_table itself must be freed by
+ * the caller.
+ * Returns a pointer to the newly allocated sg_table, or an ERR_PTR() error.
+ */
+struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj)
+{
+ struct mtk_drm_gem_obj *mtk_gem = to_mtk_gem_obj(obj);
+ struct drm_device *drm = obj->dev;
+ struct sg_table *sgt;
+ int ret;
+
+ sgt = kzalloc(sizeof(*sgt), GFP_KERNEL);
+ if (!sgt)
+ return ERR_PTR(-ENOMEM);
+
+ ret = dma_get_sgtable_attrs(drm->dev, sgt, mtk_gem->cookie,
+ mtk_gem->dma_addr, obj->size,
+ &mtk_gem->dma_attrs);
+ if (ret) {
+ DRM_ERROR("failed to allocate sgt, %d\n", ret);
+ kfree(sgt);
+ return ERR_PTR(ret);
+ }
+
+ return sgt;
+}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_gem.h
b/drivers/gpu/drm/mediatek/mtk_drm_gem.h
new file mode 100644
index 0000000..9bdeeb3
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_gem.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _MTK_DRM_GEM_H_
+#define _MTK_DRM_GEM_H_
+
+#include <drm/drm_gem.h>
+
+/*
+ * mtk drm buffer structure.
+ *
+ * @base: a gem object.
+ * - a new handle to this gem object would be created
+ * by drm_gem_handle_create().
+ * @cookie: the return value of dma_alloc_attrs(), keep it for dma_free_attrs()
+ * @kvaddr: kernel virtual address of gem buffer.
+ * @dma_addr: dma address of gem buffer.
+ * @dma_attrs: dma attributes of gem buffer.
+ *
+ * P.S. this object would be transferred to user as kms_bo.handle so
+ * user can access the buffer through kms_bo.handle.
+ */
+struct mtk_drm_gem_obj {
+ struct drm_gem_object base;
+ void *cookie;
+ void *kvaddr;
+ dma_addr_t dma_addr;
+ struct dma_attrs dma_attrs;
+};
+
+#define to_mtk_gem_obj(x) container_of(x, struct mtk_drm_gem_obj, base)
+
+void mtk_drm_gem_free_object(struct drm_gem_object *gem);
+struct mtk_drm_gem_obj *mtk_drm_gem_create(struct drm_device *dev,
+ unsigned long size, bool alloc_kmap);
+int mtk_drm_gem_dumb_create(struct drm_file *file_priv,
+ struct drm_device *dev, struct drm_mode_create_dumb *args);
+int mtk_drm_gem_dumb_map_offset(struct drm_file *file_priv,
+ struct drm_device *dev, uint32_t handle, uint64_t *offset);
+int mtk_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma);
+int mtk_drm_gem_mmap_buf(struct drm_gem_object *obj,
+ struct vm_area_struct *vma);
+struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);
+
+#endif
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
new file mode 100644
index 0000000..e9b6bf6
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
@@ -0,0 +1,242 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: CK Hu <ck...@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <drm/drmP.h>
+#include <drm/drm_atomic.h>
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_plane_helper.h>
+
+#include "mtk_drm_crtc.h"
+#include "mtk_drm_ddp_comp.h"
+#include "mtk_drm_drv.h"
+#include "mtk_drm_fb.h"
+#include "mtk_drm_gem.h"
+#include "mtk_drm_plane.h"
+
+static const uint32_t formats[] = {
+ DRM_FORMAT_XRGB8888,
+ DRM_FORMAT_ARGB8888,
+ DRM_FORMAT_RGB565,
+};
+
+static void mtk_plane_enable(struct mtk_drm_plane *mtk_plane, bool enable,
+ dma_addr_t addr, struct drm_rect *dest)
+{
+ struct drm_plane *plane = &mtk_plane->base;
+ struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
+ unsigned int pitch, format;
+ int x, y;
+
+ if (WARN_ON(!plane->state || (enable && !plane->state->fb)))
+ return;
+
+ if (plane->state->fb) {
+ pitch = plane->state->fb->pitches[0];
+ format = plane->state->fb->pixel_format;
+ } else {
+ pitch = 0;
+ format = DRM_FORMAT_RGBA8888;
+ }
+
+ x = plane->state->crtc_x;
+ y = plane->state->crtc_y;
+
+ if (x < 0) {
+ addr -= x * 4;
+ x = 0;
+ }
+
+ if (y < 0) {
+ addr -= y * pitch;
+ y = 0;
+ }
+
+ state->pending.enable = enable;
+ state->pending.pitch = pitch;
+ state->pending.format = format;
+ state->pending.addr = addr;
+ state->pending.x = x;
+ state->pending.y = y;
+ state->pending.width = dest->x2 - dest->x1;
+ state->pending.height = dest->y2 - dest->y1;
+ state->pending.dirty = true;
+}
+
+static void mtk_plane_reset(struct drm_plane *plane)
+{
+ struct mtk_plane_state *state;
+
+ if (plane->state) {
+ if (plane->state->fb)
+ drm_framebuffer_unreference(plane->state->fb);
+
+ state = to_mtk_plane_state(plane->state);
+ memset(state, 0, sizeof(*state));
+ } else {
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return;
+ plane->state = &state->base;
+ }
+
+ state->base.plane = plane;
+ state->pending.format = DRM_FORMAT_RGB565;
+}
+
+static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane
*plane)
+{
+ struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state);
+ struct mtk_plane_state *state;
+
+ state = kzalloc(sizeof(*state), GFP_KERNEL);
+ if (!state)
+ return NULL;
+
+ __drm_atomic_helper_plane_duplicate_state(plane, &state->base);
+
+ WARN_ON(state->base.plane != plane);
+
+ state->pending = old_state->pending;
+
+ return &state->base;
+}
+
+static void mtk_drm_plane_destroy_state(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ __drm_atomic_helper_plane_destroy_state(plane, state);
+ kfree(to_mtk_plane_state(state));
+}
+
+
+static const struct drm_plane_funcs mtk_plane_funcs = {
+ .update_plane = drm_atomic_helper_update_plane,
+ .disable_plane = drm_atomic_helper_disable_plane,
+ .destroy = drm_plane_cleanup,
+ .reset = mtk_plane_reset,
+ .atomic_duplicate_state = mtk_plane_duplicate_state,
+ .atomic_destroy_state = mtk_drm_plane_destroy_state,
+};
+
+static int mtk_plane_atomic_check(struct drm_plane *plane,
+ struct drm_plane_state *state)
+{
+ struct drm_framebuffer *fb = state->fb;
+ struct drm_crtc_state *crtc_state;
+ bool visible;
+ struct drm_rect dest = {
+ .x1 = state->crtc_x,
+ .y1 = state->crtc_y,
+ .x2 = state->crtc_x + state->crtc_w,
+ .y2 = state->crtc_y + state->crtc_h,
+ };
+ struct drm_rect src = {
+ /* 16.16 fixed point */
+ .x1 = state->src_x,
+ .y1 = state->src_y,
+ .x2 = state->src_x + state->src_w,
+ .y2 = state->src_y + state->src_h,
+ };
+ struct drm_rect clip = { 0, };
+
+ if (!fb)
+ return 0;
+
+ if (!mtk_fb_get_gem_obj(fb)) {
+ DRM_DEBUG_KMS("buffer is null\n");
+ return -EFAULT;
+ }
+
+ if (!state->crtc)
+ return 0;
+
+ crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc);
+ if (IS_ERR(crtc_state))
+ return PTR_ERR(crtc_state);
+
+ clip.x2 = crtc_state->mode.hdisplay;
+ clip.y2 = crtc_state->mode.vdisplay;
+
+ return drm_plane_helper_check_update(plane, state->crtc, fb,
+ &src, &dest, &clip,
+ DRM_PLANE_HELPER_NO_SCALING,
+ DRM_PLANE_HELPER_NO_SCALING,
+ true, true, &visible);
+}
+
+static void mtk_plane_atomic_update(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
+ struct drm_crtc *crtc = state->base.crtc;
+ struct drm_gem_object *gem;
+ struct mtk_drm_gem_obj *mtk_gem;
+ struct mtk_drm_plane *mtk_plane = to_mtk_plane(plane);
+ struct drm_rect dest = {
+ .x1 = state->base.crtc_x,
+ .y1 = state->base.crtc_y,
+ .x2 = state->base.crtc_x + state->base.crtc_w,
+ .y2 = state->base.crtc_y + state->base.crtc_h,
+ };
+ struct drm_rect clip = { 0, };
+
+ if (!crtc)
+ return;
+
+ clip.x2 = state->base.crtc->state->mode.hdisplay;
+ clip.y2 = state->base.crtc->state->mode.vdisplay;
+ drm_rect_intersect(&dest, &clip);
+
+ gem = mtk_fb_get_gem_obj(state->base.fb);
+ mtk_gem = to_mtk_gem_obj(gem);
+ mtk_plane_enable(mtk_plane, true, mtk_gem->dma_addr, &dest);
+
+ mtk_drm_crtc_check_flush(crtc);
+}
+
+static void mtk_plane_atomic_disable(struct drm_plane *plane,
+ struct drm_plane_state *old_state)
+{
+ struct mtk_plane_state *state = to_mtk_plane_state(plane->state);
+
+ state->pending.enable = false;
+ wmb();
+ state->pending.dirty = true;
+}
+
+static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = {
+ .atomic_check = mtk_plane_atomic_check,
+ .atomic_update = mtk_plane_atomic_update,
+ .atomic_disable = mtk_plane_atomic_disable,
+};
+
+int mtk_plane_init(struct drm_device *dev, struct mtk_drm_plane *mtk_plane,
+ unsigned long possible_crtcs, enum drm_plane_type type,
+ unsigned int zpos)
+{
+ int err;
+
+ err = drm_universal_plane_init(dev, &mtk_plane->base, possible_crtcs,
+ &mtk_plane_funcs, formats, ARRAY_SIZE(formats), type);
+
+ if (err) {
+ DRM_ERROR("failed to initialize plane\n");
+ return err;
+ }
+
+ drm_plane_helper_add(&mtk_plane->base, &mtk_plane_helper_funcs);
+ mtk_plane->idx = zpos;
+
+ return 0;
+}
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.h
b/drivers/gpu/drm/mediatek/mtk_drm_plane.h
new file mode 100644
index 0000000..72a7b3e
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.h
@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: CK Hu <ck...@mediatek.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _MTK_DRM_PLANE_H_
+#define _MTK_DRM_PLANE_H_
+
+#include <drm/drm_crtc.h>
+#include <linux/types.h>
+
+struct mtk_drm_plane {
+ struct drm_plane base;
+ unsigned int idx;
+};
+
+struct mtk_plane_pending_state {
+ bool config;
+ bool enable;
+ dma_addr_t addr;
+ unsigned int pitch;
+ unsigned int format;
+ unsigned int x;
+ unsigned int y;
+ unsigned int width;
+ unsigned int height;
+ bool dirty;
+};
+
+struct mtk_plane_state {
+ struct drm_plane_state base;
+ struct mtk_plane_pending_state pending;
+};
+
+static inline struct mtk_drm_plane *to_mtk_plane(struct drm_plane *plane)
+{
+ return container_of(plane, struct mtk_drm_plane, base);
+}
+
+static inline struct mtk_plane_state *
+to_mtk_plane_state(struct drm_plane_state *state)
+{
+ return container_of(state, struct mtk_plane_state, base);
+}
+
+int mtk_plane_init(struct drm_device *dev, struct mtk_drm_plane *mtk_plane,
+ unsigned long possible_crtcs, enum drm_plane_type type,
+ unsigned int zpos);
+
+#endif
--
2.6.2
--
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