This is a quick conversion of Exynos DRM rotator driver from
Exynos IPP framework to generic DRM FBProc API to demonstrate how to use it
from the driver side.
Not-for-merge-yet: the code of the driver must be cleaned up first, because
its internals still depends on Exynos IPP structures.
Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
---
drivers/gpu/drm/exynos/Kconfig | 1 -
drivers/gpu/drm/exynos/exynos_drm_drv.c | 3 +-
drivers/gpu/drm/exynos/exynos_drm_rotator.c | 353 +++++++++++++++-------------
drivers/gpu/drm/exynos/exynos_drm_rotator.h | 19 --
4 files changed, 194 insertions(+), 182 deletions(-)
delete mode 100644 drivers/gpu/drm/exynos/exynos_drm_rotator.h
diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 83f61c513b7e..6eebba9be797 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -109,7 +109,6 @@ config DRM_EXYNOS_FIMC
config DRM_EXYNOS_ROTATOR
bool "Rotator"
- depends on DRM_EXYNOS_IPP
help
Choose this option if you want to use Exynos Rotator for DRM.
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c
b/drivers/gpu/drm/exynos/exynos_drm_drv.c
index 877d2efa28e2..f536a63531bb 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c
@@ -395,7 +395,7 @@ static const struct file_operations exynos_drm_driver_fops
= {
static struct drm_driver exynos_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME
- | DRIVER_ATOMIC | DRIVER_RENDER,
+ | DRIVER_ATOMIC | DRIVER_RENDER |
DRIVER_FBPROC,
.load = exynos_drm_load,
.unload = exynos_drm_unload,
.open = exynos_drm_open,
@@ -532,6 +532,7 @@ static struct exynos_drm_driver_info exynos_drm_drivers[] =
{
DRV_PTR(fimc_driver, CONFIG_DRM_EXYNOS_FIMC),
}, {
DRV_PTR(rotator_driver, CONFIG_DRM_EXYNOS_ROTATOR),
+ DRM_COMPONENT_DRIVER
}, {
DRV_PTR(gsc_driver, CONFIG_DRM_EXYNOS_GSC),
}, {
diff --git a/drivers/gpu/drm/exynos/exynos_drm_rotator.c
b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
index 404367a430b5..8ecd8db0649a 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_rotator.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_rotator.c
@@ -10,6 +10,7 @@
*/
#include <linux/kernel.h>
+#include <linux/component.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/io.h>
@@ -21,8 +22,10 @@
#include <drm/drmP.h>
#include <drm/exynos_drm.h>
#include "regs-rotator.h"
+#include "exynos_drm_fb.h"
#include "exynos_drm_drv.h"
#include "exynos_drm_ipp.h"
+#include "exynos_drm_iommu.h"
/*
* Rotator supports image crop/rotator and input/output DMA operations.
@@ -92,7 +95,9 @@ struct rot_limit_table {
* @suspended: suspended state.
*/
struct rot_context {
- struct exynos_drm_ippdrv ippdrv;
+ struct drm_fbproc fbproc;
+ struct drm_device *drm_dev;
+ struct device *dev;
struct resource *regs_res;
void __iomem *regs;
struct clk *clock;
@@ -100,6 +105,10 @@ struct rot_context {
int irq;
int cur_buf_id[EXYNOS_DRM_OPS_MAX];
bool suspended;
+ spinlock_t lock;
+ struct drm_fbproc_task *task;
+ wait_queue_head_t done_wq;
+ bool done;
};
static void rotator_reg_set_irq(struct rot_context *rot, bool enable)
@@ -138,9 +147,6 @@ static enum rot_irq_status
rotator_reg_get_irq_status(struct rot_context *rot)
static irqreturn_t rotator_irq_handler(int irq, void *arg)
{
struct rot_context *rot = arg;
- struct exynos_drm_ippdrv *ippdrv = &rot->ippdrv;
- struct drm_exynos_ipp_cmd_node *c_node = ippdrv->c_node;
- struct drm_exynos_ipp_event_work *event_work = c_node->event_work;
enum rot_irq_status irq_status;
u32 val;
@@ -152,12 +158,14 @@ static irqreturn_t rotator_irq_handler(int irq, void *arg)
val |= ROT_STATUS_IRQ_PENDING((u32)irq_status);
rot_write(val, ROT_STATUS);
- if (irq_status == ROT_IRQ_STATUS_COMPLETE) {
- event_work->ippdrv = ippdrv;
- event_work->buf_id[EXYNOS_DRM_OPS_DST] =
- rot->cur_buf_id[EXYNOS_DRM_OPS_DST];
- queue_work(ippdrv->event_workq, &event_work->work);
- } else {
+ spin_lock(&rot->lock);
+ rot->task = NULL;
+ rot->done = true;
+ spin_unlock(&rot->lock);
+
+ wake_up(&rot->done_wq);
+
+ if (irq_status != ROT_IRQ_STATUS_COMPLETE) {
DRM_ERROR("the SFR is set illegally\n");
}
@@ -455,36 +463,6 @@ static int rotator_dst_set_addr(struct device *dev,
return 0;
}
-static struct exynos_drm_ipp_ops rot_src_ops = {
- .set_fmt = rotator_src_set_fmt,
- .set_size = rotator_src_set_size,
- .set_addr = rotator_src_set_addr,
-};
-
-static struct exynos_drm_ipp_ops rot_dst_ops = {
- .set_transf = rotator_dst_set_transf,
- .set_size = rotator_dst_set_size,
- .set_addr = rotator_dst_set_addr,
-};
-
-static int rotator_init_prop_list(struct exynos_drm_ippdrv *ippdrv)
-{
- struct drm_exynos_ipp_prop_list *prop_list = &ippdrv->prop_list;
-
- prop_list->version = 1;
- prop_list->flip = (1 << EXYNOS_DRM_FLIP_VERTICAL) |
- (1 << EXYNOS_DRM_FLIP_HORIZONTAL);
- prop_list->degree = (1 << EXYNOS_DRM_DEGREE_0) |
- (1 << EXYNOS_DRM_DEGREE_90) |
- (1 << EXYNOS_DRM_DEGREE_180) |
- (1 << EXYNOS_DRM_DEGREE_270);
- prop_list->csc = 0;
- prop_list->crop = 0;
- prop_list->scale = 0;
-
- return 0;
-}
-
static inline bool rotator_check_drm_fmt(u32 fmt)
{
switch (fmt) {
@@ -511,93 +489,6 @@ static inline bool rotator_check_drm_flip(enum
drm_exynos_flip flip)
}
}
-static int rotator_ippdrv_check_property(struct device *dev,
- struct drm_exynos_ipp_property *property)
-{
- struct drm_exynos_ipp_config *src_config =
- &property->config[EXYNOS_DRM_OPS_SRC];
- struct drm_exynos_ipp_config *dst_config =
- &property->config[EXYNOS_DRM_OPS_DST];
- struct drm_exynos_pos *src_pos = &src_config->pos;
- struct drm_exynos_pos *dst_pos = &dst_config->pos;
- struct drm_exynos_sz *src_sz = &src_config->sz;
- struct drm_exynos_sz *dst_sz = &dst_config->sz;
- bool swap = false;
-
- /* Check format configuration */
- if (src_config->fmt != dst_config->fmt) {
- DRM_DEBUG_KMS("not support csc feature\n");
- return -EINVAL;
- }
-
- if (!rotator_check_drm_fmt(dst_config->fmt)) {
- DRM_DEBUG_KMS("invalid format\n");
- return -EINVAL;
- }
-
- /* Check transform configuration */
- if (src_config->degree != EXYNOS_DRM_DEGREE_0) {
- DRM_DEBUG_KMS("not support source-side rotation\n");
- return -EINVAL;
- }
-
- switch (dst_config->degree) {
- case EXYNOS_DRM_DEGREE_90:
- case EXYNOS_DRM_DEGREE_270:
- swap = true;
- case EXYNOS_DRM_DEGREE_0:
- case EXYNOS_DRM_DEGREE_180:
- /* No problem */
- break;
- default:
- DRM_DEBUG_KMS("invalid degree\n");
- return -EINVAL;
- }
-
- if (src_config->flip != EXYNOS_DRM_FLIP_NONE) {
- DRM_DEBUG_KMS("not support source-side flip\n");
- return -EINVAL;
- }
-
- if (!rotator_check_drm_flip(dst_config->flip)) {
- DRM_DEBUG_KMS("invalid flip\n");
- return -EINVAL;
- }
-
- /* Check size configuration */
- if ((src_pos->x + src_pos->w > src_sz->hsize) ||
- (src_pos->y + src_pos->h > src_sz->vsize)) {
- DRM_DEBUG_KMS("out of source buffer bound\n");
- return -EINVAL;
- }
-
- if (swap) {
- if ((dst_pos->x + dst_pos->h > dst_sz->vsize) ||
- (dst_pos->y + dst_pos->w > dst_sz->hsize)) {
- DRM_DEBUG_KMS("out of destination buffer bound\n");
- return -EINVAL;
- }
-
- if ((src_pos->w != dst_pos->h) || (src_pos->h != dst_pos->w)) {
- DRM_DEBUG_KMS("not support scale feature\n");
- return -EINVAL;
- }
- } else {
- if ((dst_pos->x + dst_pos->w > dst_sz->hsize) ||
- (dst_pos->y + dst_pos->h > dst_sz->vsize)) {
- DRM_DEBUG_KMS("out of destination buffer bound\n");
- return -EINVAL;
- }
-
- if ((src_pos->w != dst_pos->w) || (src_pos->h != dst_pos->h)) {
- DRM_DEBUG_KMS("not support scale feature\n");
- return -EINVAL;
- }
- }
-
- return 0;
-}
-
static int rotator_ippdrv_start(struct device *dev, enum drm_exynos_ipp_cmd
cmd)
{
struct rot_context *rot = dev_get_drvdata(dev);
@@ -692,24 +583,184 @@ static const struct of_device_id exynos_rotator_match[]
= {
};
MODULE_DEVICE_TABLE(of, exynos_rotator_match);
+static int rotator_get_exclusive_access(struct rot_context *rot,
+ struct drm_fbproc_task *task)
+{
+ unsigned long flags;
+ int got_access = false;
+ int ret = 0;
+
+try_again:
+ spin_lock_irqsave(&rot->lock, flags);
+ if (rot->task == NULL) {
+ rot->task = task;
+ got_access = true;
+ }
+ spin_unlock_irqrestore(&rot->lock, flags);
+
+ if (!got_access) {
+ ret = wait_event_interruptible(rot->done_wq, rot->done);
+ if (ret)
+ return ret;
+ goto try_again;
+ }
+ return ret;
+}
+
+static int rotator_commit(struct drm_fbproc *fbproc,
+ struct drm_fbproc_task *task)
+{
+ struct rot_context *rot =
+ container_of(fbproc, struct rot_context, fbproc);
+ struct device *dev = rot->dev;
+ dma_addr_t src_dma = exynos_drm_fb_dma_addr(task->src_fb, 0);
+ dma_addr_t dst_dma = exynos_drm_fb_dma_addr(task->dst_fb, 0);
+ int r = task->rotation;
+ int w = task->src_w >> 16;
+ int h = task->src_h >> 16;
+ int sx = task->src_x >> 16;
+ int dx = task->dst_x >> 16;
+ int sy = task->src_y >> 16;
+ int dy = task->dst_y >> 16;
+ int sp = task->src_fb->pitches[0];
+ int dp = task->dst_fb->pitches[0];
+
+ struct drm_exynos_ipp_buf_info src_buf_info = { .base[0] = src_dma, };
+ struct drm_exynos_ipp_buf_info dst_buf_info = { .base[0] = dst_dma, };
+ struct drm_exynos_pos src_pos = { sx, sy, w, h, };
+ struct drm_exynos_pos dst_pos = { dx, dy, w, h, };
+ struct drm_exynos_sz src_sz = { sp/4, h+sy, };
+ struct drm_exynos_sz dst_sz = { dp/4, h+dy, };
+ int ret;
+ int rotation = 0, flip = 0;
+ bool swap;
+
+ if (r & DRM_ROTATE_180)
+ rotation = EXYNOS_DRM_DEGREE_180;
+ else if (r & DRM_ROTATE_90)
+ rotation = EXYNOS_DRM_DEGREE_90;
+ else if (r & DRM_ROTATE_270)
+ rotation = EXYNOS_DRM_DEGREE_270;
+
+ if (r & DRM_REFLECT_X)
+ flip |= EXYNOS_DRM_FLIP_HORIZONTAL;
+ if (r & DRM_REFLECT_Y)
+ flip |= EXYNOS_DRM_FLIP_VERTICAL;
+
+ ret = rotator_get_exclusive_access(rot, task);
+ if (ret < 0)
+ return ret;
+
+ pm_runtime_get_sync(dev);
+
+ dev_dbg(dev, "r %d w %d h %d sx %d sy %d sp %d dx %d dy %d pd %d\n",
+ r, w, h, sx, sy, sp, dx, dy, dp);
+ rot->done = 0;
+
+ ret = rotator_src_set_fmt(dev, DRM_FORMAT_XRGB8888);
+ if (ret)
+ printk("error setting rotator %d\n", __LINE__);
+ ret = rotator_src_set_size(dev, 0, &src_pos, &src_sz);
+ if (ret)
+ printk("error setting rotator %d\n", __LINE__);
+ ret = rotator_src_set_addr(dev, &src_buf_info, 0, IPP_BUF_ENQUEUE);
+ if (ret)
+ printk("error setting rotator %d\n", __LINE__);
+
+ ret = rotator_dst_set_transf(dev, rotation, flip, &swap);
+ if (ret)
+ printk("error setting rotator %d\n", __LINE__);
+
+ if (swap) {
+ swap(dst_pos.w, dst_pos.h);
+ dst_sz.vsize = w+dy;
+ }
+ ret = rotator_dst_set_size(dev, 0, &dst_pos, &dst_sz);
+ if (ret)
+ printk("error setting rotator %d\n", __LINE__);
+ ret = rotator_dst_set_addr(dev, &dst_buf_info, 0, IPP_BUF_ENQUEUE);
+ if (ret)
+ printk("error setting rotator %d\n", __LINE__);
+
+ rotator_ippdrv_start(dev, IPP_CMD_M2M);
+
+ wait_event(rot->done_wq, rot->done);
+
+ pm_runtime_put(dev);
+
+ return 0;
+}
+
+struct drm_fbproc_funcs fbproc_funcs = {
+ .commit = rotator_commit,
+};
+
+static const uint32_t rotator_formats[] = {
+ DRM_FORMAT_XRGB8888,
+};
+
+static int rotator_bind(struct device *dev, struct device *master, void *data)
+{
+ struct rot_context *rot = dev_get_drvdata(dev);
+ struct drm_device *drm_dev = data;
+ struct drm_fbproc *fbproc = &rot->fbproc;
+ struct drm_property *prop;
+
+ rot->drm_dev = drm_dev;
+ drm_iommu_attach_device(drm_dev, dev);
+
+
+ drm_fbproc_init(drm_dev, fbproc, &fbproc_funcs,
+ DRM_FBPROC_CAP_CROP | DRM_FBPROC_CAP_ROTATE,
+ rotator_formats, ARRAY_SIZE(rotator_formats),
+ rotator_formats, ARRAY_SIZE(rotator_formats),
+ "rotator");
+
+ prop = drm_mode_create_rotation_property(drm_dev,
+ DRM_ROTATE_0 | DRM_ROTATE_90 | DRM_ROTATE_180 |
+ DRM_ROTATE_270 | DRM_REFLECT_X | DRM_REFLECT_Y);
+
+ fbproc->rotation_property = prop;
+ drm_object_attach_property(&fbproc->base, prop, DRM_ROTATE_0);
+
+ dev_info(dev, "The exynos rotator is probed successfully\n");
+
+ return 0;
+}
+
+static void rotator_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct rot_context *rot = dev_get_drvdata(dev);
+
+ drm_iommu_detach_device(rot->drm_dev, rot->dev);
+}
+
+static const struct component_ops rotator_component_ops = {
+ .bind = rotator_bind,
+ .unbind = rotator_unbind,
+};
+
static int rotator_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct rot_context *rot;
- struct exynos_drm_ippdrv *ippdrv;
+ const struct of_device_id *match;
int ret;
- if (!dev->of_node) {
- dev_err(dev, "cannot find of_node.\n");
- return -ENODEV;
- }
-
rot = devm_kzalloc(dev, sizeof(*rot), GFP_KERNEL);
if (!rot)
return -ENOMEM;
- rot->limit_tbl = (struct rot_limit_table *)
- of_device_get_match_data(dev);
+ match = of_match_node(exynos_rotator_match, dev->of_node);
+ if (!match) {
+ dev_err(dev, "failed to match node\n");
+ return -ENODEV;
+ }
+
+ spin_lock_init(&rot->lock);
+ rot->limit_tbl = (struct rot_limit_table *)match->data;
+ rot->dev = dev;
rot->regs_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
rot->regs = devm_ioremap_resource(dev, rot->regs_res);
if (IS_ERR(rot->regs))
@@ -721,6 +772,8 @@ static int rotator_probe(struct platform_device *pdev)
return rot->irq;
}
+ init_waitqueue_head(&rot->done_wq);
+
ret = devm_request_threaded_irq(dev, rot->irq, NULL,
rotator_irq_handler, IRQF_ONESHOT, "drm_rotator", rot);
if (ret < 0) {
@@ -734,31 +787,12 @@ static int rotator_probe(struct platform_device *pdev)
return PTR_ERR(rot->clock);
}
- pm_runtime_enable(dev);
-
- ippdrv = &rot->ippdrv;
- ippdrv->dev = dev;
- ippdrv->ops[EXYNOS_DRM_OPS_SRC] = &rot_src_ops;
- ippdrv->ops[EXYNOS_DRM_OPS_DST] = &rot_dst_ops;
- ippdrv->check_property = rotator_ippdrv_check_property;
- ippdrv->start = rotator_ippdrv_start;
- ret = rotator_init_prop_list(ippdrv);
- if (ret < 0) {
- dev_err(dev, "failed to init property list.\n");
- goto err_ippdrv_register;
- }
-
- DRM_DEBUG_KMS("ippdrv[%p]\n", ippdrv);
-
platform_set_drvdata(pdev, rot);
+ pm_runtime_enable(dev);
- ret = exynos_drm_ippdrv_register(ippdrv);
- if (ret < 0) {
- dev_err(dev, "failed to register drm rotator device\n");
+ ret = component_add(dev, &rotator_component_ops);
+ if (ret)
goto err_ippdrv_register;
- }
-
- dev_info(dev, "The exynos rotator is probed successfully\n");
return 0;
@@ -770,11 +804,8 @@ err_ippdrv_register:
static int rotator_remove(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct rot_context *rot = dev_get_drvdata(dev);
- struct exynos_drm_ippdrv *ippdrv = &rot->ippdrv;
-
- exynos_drm_ippdrv_unregister(ippdrv);
+ component_del(dev, &rotator_component_ops);
pm_runtime_disable(dev);
return 0;
diff --git a/drivers/gpu/drm/exynos/exynos_drm_rotator.h
b/drivers/gpu/drm/exynos/exynos_drm_rotator.h
deleted file mode 100644
index 71a0b4c0c1e8..000000000000
--- a/drivers/gpu/drm/exynos/exynos_drm_rotator.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/*
- * Copyright (c) 2012 Samsung Electronics Co., Ltd.
- *
- * Authors:
- * YoungJun Cho <yj44.cho at samsung.com>
- * Eunchul Kim <chulspro.kim at samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#ifndef _EXYNOS_DRM_ROTATOR_H_
-#define _EXYNOS_DRM_ROTATOR_H_
-
-/* TODO */
-
-#endif
--
1.9.1
