Add a driver for Cadence DPI -> DSI bridge.
This driver only support a subset of Cadence DSI bridge capabilities.
Here is a non-exhaustive list of missing features:
* burst mode
* dynamic configuration of the DPHY based on the
* support for additional input interfaces (SDI input)
Signed-off-by: Boris Brezillon <boris.brezil...@free-electrons.com>
---
Changes in v3:
- replace magic values by real timing calculation. The DPHY PLL clock
is still hardcoded since we don't have a working DPHY block yet, and
this is the piece of HW we need to dynamically configure the PLL
rate based on the display refresh rate and the resolution.
- parse DSI devices represented with the OF-graph. This is needed to
support DSI devices controlled through an external bus like I2C or
SPI.
- use the DRM panel-bridge infrastructure to simplify the DRM panel
logic
Changes in v2:
- rebase on v4.12-rc1 and adapt to driver to the drm_bridge API changes
- return the correct error when devm_clk_get(sysclk) fails
- add missing depends on OF and select DRM_PANEL in the Kconfig entry
---
drivers/gpu/drm/bridge/Kconfig | 9 +
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/cdns-dsi.c | 1090 +++++++++++++++++++++++++++++++++++++
3 files changed, 1100 insertions(+)
create mode 100644 drivers/gpu/drm/bridge/cdns-dsi.c
diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index adf9ae0e0b7c..88c324b12e16 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -25,6 +25,15 @@ config DRM_ANALOGIX_ANX78XX
the HDMI output of an application processor to MyDP
or DisplayPort.
+config DRM_CDNS_DSI
+ tristate "Cadence DPI/DSI bridge"
+ select DRM_KMS_HELPER
+ select DRM_MIPI_DSI
+ select DRM_PANEL
+ depends on OF
+ help
+ Support Cadence DPI to DSI bridge.
+
config DRM_DUMB_VGA_DAC
tristate "Dumb VGA DAC Bridge support"
depends on OF
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index defcf1e7ca1c..77b65e8ecf59 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -1,4 +1,5 @@
obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
+obj-$(CONFIG_DRM_CDNS_DSI) += cdns-dsi.o
obj-$(CONFIG_DRM_DUMB_VGA_DAC) += dumb-vga-dac.o
obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o
obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) +=
megachips-stdpxxxx-ge-b850v3-fw.o
diff --git a/drivers/gpu/drm/bridge/cdns-dsi.c
b/drivers/gpu/drm/bridge/cdns-dsi.c
new file mode 100644
index 000000000000..f5dc26c90b20
--- /dev/null
+++ b/drivers/gpu/drm/bridge/cdns-dsi.c
@@ -0,0 +1,1090 @@
+/*
+ * Copyright: 2017 Cadence Design Systems, Inc.
+ *
+ * Author: Boris Brezillon <boris.brezil...@free-electrons.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.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_panel.h>
+#include <video/mipi_display.h>
+
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+
+#define IP_CONF 0x0
+#define SP_HS_FIFO_DEPTH(x) (((x) & GENMASK(30, 26)) >> 26)
+#define SP_LP_FIFO_DEPTH(x) (((x) & GENMASK(25, 21)) >> 21)
+#define VRS_FIFO_DEPTH(x) (((x) & GENMASK(20, 16)) >> 16)
+#define DIRCMD_FIFO_DEPTH(x) (((x) & GENMASK(15, 13)) >> 13)
+#define SDI_IFACE_32 BIT(12)
+#define INTERNAL_DATAPATH_32 (0 << 10)
+#define INTERNAL_DATAPATH_16 (1 << 10)
+#define INTERNAL_DATAPATH_8 (3 << 10)
+#define INTERNAL_DATAPATH_SIZE ((x) & GENMASK(11, 10))
+#define INTERNAL_DATAPATH_32 (0 << 10)
+#define INTERNAL_DATAPATH_16 (1 << 10)
+#define INTERNAL_DATAPATH_8 (3 << 10)
+#define NUM_IFACE(x) ((((x) & GENMASK(9, 8)) >> 8) + 1)
+#define MAX_LANE_NB(x) (((x) & GENMASK(7, 6)) >> 6)
+#define RX_FIFO_DEPTH(x) ((x) & GENMASK(5, 0))
+
+#define MCTL_MAIN_DATA_CTL 0x4
+#define TE_MIPI_POLLING_EN BIT(25)
+#define TE_HW_POLLING_EN BIT(24)
+#define DISP_EOT_GEN BIT(18)
+#define HOST_EOT_GEN BIT(17)
+#define DISP_GEN_CHECKSUM BIT(16)
+#define DISP_GEN_ECC BIT(15)
+#define BTA_EN BIT(14)
+#define READ_EN BIT(13)
+#define REG_TE_EN BIT(12)
+#define IF_TE_EN(x) BIT(8 + (x))
+#define TBG_SEL BIT(7)
+#define TVG_SEL BIT(6)
+#define VID_EN BIT(5)
+#define IF_VID_SELECT(x) ((x) << 2)
+#define IF_VID_SELECT_MASK GENMASK(4, 2)
+#define IF_VID_MODE BIT(1)
+#define LINK_EN BIT(0)
+
+#define MCTL_MAIN_PHY_CTL 0x8
+#define CLK_FORCE_STOP BIT(14)
+#define WAIT_BURST_TIME(x) ((x) << 10)
+#define DATA_ULPM_EN(x) BIT(6 + (x))
+#define CLK_ULPM_EN BIT(5)
+#define CLK_CONTINUOUS BIT(4)
+#define DATA_FORCE_STOP BIT(3)
+#define DATA_LANE_EN(x) BIT((x) - 1)
+
+#define MCTL_LANE_STS 0x10
+#define LANE_STATE_START 0
+#define LANE_STATE_IDLE 1
+#define LANE_STATE_WRITE 2
+#define LANE_STATE_ULPM 3
+#define LANE_STATE_READ 4
+#define DATA_LANE_STATE(l, val) \
+ (((val) >> (2 + 2 * (l) + ((l) ? 1 : 0))) & GENMASK((l) ? 1 : 2, 0))
+#define CLK_LANE_STATE_HS 2
+#define CLK_LANE_STATE(val) ((val) & GENMASK(1, 0))
+
+#define MCTL_DPHY_TIMEOUT1 0x14
+#define CLK_DIV(x) (x)
+#define CLK_DIV_MAX GENMASK(3, 0)
+#define HSTX_TIMEOUT(x) ((x) << 4)
+#define HSTX_TIMEOUT_MAX GENMASK(21, 4)
+
+#define MCTL_DPHY_TIMEOUT2 0x18
+#define LPRX_TIMEOUT(x) (x)
+
+#define MCTL_ULPOUT_TIME 0x1c
+#define DATA_LANE_ULPOUT_TIME(x) ((x) << 9)
+#define CLK_LANE_ULPOUT_TIME(x) (x)
+
+#define MCTL_DPHY_STATIC 0x20
+#define INVERT_DATA_HS(l) BIT((l) * (2 + 1) + 1)
+#define SWAP_DATA_PINS(l) BIT((l) * (2 + 1))
+#define INVERT_CLK_HS BIT(1)
+#define SWAP_CLK_PINS BIT(0)
+
+#define MCTL_MAIN_EN 0x24
+#define IF_EN(x) BIT(13 + (x))
+#define DATA_LANE_ULPM_REQ(l) BIT(9 + (l))
+#define CLK_LANE_ULPM_REQ BIT(8)
+#define DATA_LANE_START(x) BIT(4 + (x))
+#define CLK_LANE_EN BIT(3)
+#define PLL_START BIT(0)
+
+#define MCTL_MAIN_STS 0x28
+#define MCTL_MAIN_STS_CTL 0x130
+#define MCTL_MAIN_STS_CLR 0x150
+#define MCTL_MAIN_STS_FLAG 0x170
+#define IF_UNTERM_PKT_ERR(x) BIT(8 + (x))
+#define LPRX_TIMEOUT_ERR BIT(7)
+#define HSTX_TIMEOUT_ERR BIT(6)
+#define DATA_LANE_RDY(l) BIT(2 + (l))
+#define CLK_LANE_RDY BIT(1)
+#define PLL_LOCKED BIT(0)
+
+#define MCTL_DPHY_ERR 0x2c
+#define MCTL_DPHY_ERR_CTL1 0x148
+#define MCTL_DPHY_ERR_CLR 0x168
+#define MCTL_DPHY_ERR_FLAG 0x188
+#define ERR_CONT_LP(x, l) BIT(18 + ((x) * 4) + (l))
+#define ERR_CONTROL(l) BIT(14 + (l))
+#define ERR_SYNESC(l) BIT(10 + (l))
+#define ERR_ESC(l) BIT(6 + (l))
+
+#define MCTL_DPHY_ERR_CTL2 0x14c
+#define ERR_CONT_LP_EDGE(x, l) BIT(12 + ((x) * 4) + (l))
+#define ERR_CONTROL_EDGE(l) BIT(8 + (l))
+#define ERR_SYN_ESC_EDGE(l) BIT(4 + (l))
+#define ERR_ESC_EDGE(l) BIT(0 + (l))
+
+#define CMD_MODE_CTL 0x70
+#define IF_VCHAN_ID(x, c) ((c) << ((x) * 2))
+#define IF_LP_EN(x) BIT(9 + (x))
+
+#define CMD_MODE_CTL2 0x74
+#define TE_TIMEOUT(x) ((x) << 11)
+#define FILL_VALUE(x) ((x) << 3)
+#define ARB_IF_WITH_HIGHEST_PRIORITY(x) ((x) << 1)
+#define ARB_ROUND_ROBIN_MODE BIT(0)
+
+#define CMD_MODE_STS 0x78
+#define CMD_MODE_STS_CTL 0x134
+#define CMD_MODE_STS_CLR 0x154
+#define CMD_MODE_STS_FLAG 0x174
+#define ERR_IF_UNDERRUN(x) BIT(4 + (x))
+#define ERR_UNWANTED_READ BIT(3)
+#define ERR_TE_MISS BIT(2)
+#define ERR_NO_TE BIT(1)
+#define CSM_RUNNING BIT(0)
+
+#define DIRECT_CMD_SEND 0x80
+
+#define DIRECT_CMD_MAIN_SETTINGS 0x84
+#define TRIGGER_VAL(x) ((x) << 25)
+#define CMD_LP_EN BIT(24)
+#define CMD_SIZE(x) ((x) << 16)
+#define CMD_VCHAN_ID(x) ((x) << 14)
+#define CMD_DATATYPE(x) ((x) << 8)
+#define CMD_LONG BIT(3)
+#define WRITE_CMD 0
+#define READ_CMD 1
+#define TE_REQ 4
+#define TRIGGER_REQ 5
+#define BTA_REQ 6
+
+#define DIRECT_CMD_STS 0x88
+#define DIRECT_CMD_STS_CTL 0x138
+#define DIRECT_CMD_STS_CLR 0x158
+#define DIRECT_CMD_STS_FLAG 0x178
+#define RCVD_ACK_VAL(val) ((val) >> 16)
+#define RCVD_TRIGGER_VAL(val) (((val) & GENMASK(14, 11)) >> 11)
+#define READ_COMPLETED_WITH_ERR BIT(10)
+#define BTA_FINISHED BIT(9)
+#define BTA_COMPLETED BIT(8)
+#define TE_RCVD BIT(7)
+#define TRIGGER_RCVD BIT(6)
+#define ACK_WITH_ERR_RCVD BIT(5)
+#define ACK_RCVD BIT(4)
+#define READ_COMPLETED BIT(3)
+#define TRIGGER_COMPLETED BIT(2)
+#define WRITE_COMPLETED BIT(1)
+#define SENDING_CMD BIT(0)
+
+#define DIRECT_CMD_STOP_READ 0x8c
+
+#define DIRECT_CMD_WRDATA 0x90
+#define WRDAT(x, val) ((val) << ((x) * 8))
+
+#define DIRECT_CMD_FIFO_RST 0x94
+
+#define DIRECT_CMD_RDDATA 0xa0
+#define RDDAT(x, val) (((val) >> ((x) * 8)) & GENMASK(7, 0))
+
+#define DIRECT_CMD_RD_PROPS 0xa4
+#define RD_DCS BIT(18)
+#define RD_VCHAN_ID(val) (((val) >> 16) & GENMASK(1, 0))
+#define RD_SIZE(val) ((val) & GENMASK(15, 0))
+
+#define DIRECT_CMD_RD_STS 0xa8
+#define DIRECT_CMD_RD_STS_CTL 0x13c
+#define DIRECT_CMD_RD_STS_CLR 0x15c
+#define DIRECT_CMD_RD_STS_FLAG 0x17c
+#define ERR_EOT_WITH_ERR BIT(8)
+#define ERR_MISSING_EOT BIT(7)
+#define ERR_WRONG_LENGTH BIT(6)
+#define ERR_OVERSIZE BIT(5)
+#define ERR_RECEIVE BIT(4)
+#define ERR_UNDECODABLE BIT(3)
+#define ERR_CHECKSUM BIT(2)
+#define ERR_UNCORRECTABLE BIT(1)
+#define ERR_FIXED BIT(0)
+
+#define VID_MAIN_CTL 0xb0
+#define VID_FIELD_SW BIT(28)
+#define VID_INTERLACED_EN BIT(27)
+#define RECOVERY_MODE(x) ((x) << 25)
+#define RECOVERY_MODE_NEXT_HSYNC 0
+#define RECOVERY_MODE_NEXT_STOP_POINT 2
+#define RECOVERY_MODE_NEXT_VSYNC 3
+#define REG_BLKEOL_MODE(x) ((x) << 23)
+#define REG_BLKLINE_MODE(x) ((x) << 21)
+#define REG_BLK_MODE_NULL_PKT 0
+#define REG_BLK_MODE_BLANKING_PKT 1
+#define REG_BLK_MODE_LP 2
+#define SYNC_PULSE_HORIZONTAL BIT(20)
+#define SYNC_PULSE_ACTIVE BIT(19)
+#define BURST_MODE BIT(18)
+#define VID_PIXEL_MODE_MASK GENMASK(17, 14)
+#define VID_PIXEL_MODE_RGB565 (0 << 14)
+#define VID_PIXEL_MODE_RGB666_PACKED (1 << 14)
+#define VID_PIXEL_MODE_RGB666 (2 << 14)
+#define VID_PIXEL_MODE_RGB888 (3 << 14)
+#define VID_PIXEL_MODE_RGB101010 (4 << 14)
+#define VID_PIXEL_MODE_RGB121212 (5 << 14)
+#define VID_PIXEL_MODE_YUV420 (8 << 14)
+#define VID_PIXEL_MODE_YUV422_PACKED (9 << 14)
+#define VID_PIXEL_MODE_YUV422 (10 << 14)
+#define VID_PIXEL_MODE_YUV422_24B (11 << 14)
+#define VID_DATATYPE(x) ((x) << 8)
+#define VID_VIRTCHAN_ID(iface, x) ((x) << (4 + (iface) * 2))
+#define STOP_MODE(x) ((x) << 2)
+#define START_MODE(x) (x)
+
+#define VID_VSIZE1 0xb4
+#define VFP_LEN(x) ((x) << 12)
+#define VBP_LEN(x) ((x) << 6)
+#define VSA_LEN(x) (x)
+
+#define VID_VSIZE2 0xb8
+#define VACT_LEN(x) (x)
+
+#define VID_HSIZE1 0xc0
+#define HFP_LEN(x) ((x) << 20)
+#define HBP_LEN(x) ((x) << 10)
+#define HSA_LEN(x) (x)
+
+#define VID_HSIZE2 0xc4
+#define HACT_LEN(x) (x)
+
+#define VID_BLKSIZE1 0xcc
+#define BLK_EOL_PKT_LEN(x) ((x) << 15)
+#define BLK_LINE_EVENT_PKT_LEN(x) (x)
+
+#define VID_BLKSIZE2 0xd0
+#define BLK_LINE_PULSE_PKT_LEN(x) (x)
+
+#define VID_PKT_TIME 0xd8
+#define BLK_EOL_DURATION(x) (x)
+
+#define VID_DPHY_TIME 0xdc
+#define REG_WAKEUP_TIME(x) ((x) << 17)
+#define REG_LINE_DURATION(x) (x)
+
+#define VID_ERR_COLOR1 0xe0
+#define COL_GREEN(x) ((x) << 12)
+#define COL_RED(x) (x)
+
+#define VID_ERR_COLOR2 0xe4
+#define PAD_VAL(x) ((x) << 12)
+#define COL_BLUE(x) (x)
+
+#define VID_VPOS 0xe8
+#define LINE_VAL(val) (((val) & GENMASK(14, 2)) >> 2)
+#define LINE_POS(val) ((val) & GENMASK(1, 0))
+
+#define VID_HPOS 0xec
+#define HORIZ_VAL(val) (((val) & GENMASK(17, 3)) >> 3)
+#define HORIZ_POS(val) ((val) & GENMASK(2, 0))
+
+#define VID_MODE_STS 0xf0
+#define VID_MODE_STS_CTL 0x140
+#define VID_MODE_STS_CLR 0x160
+#define VID_MODE_STS_FLAG 0x180
+#define VSG_RECOVERY BIT(10)
+#define ERR_VRS_WRONG_LEN BIT(9)
+#define ERR_LONG_READ BIT(8)
+#define ERR_LINE_WRITE BIT(7)
+#define ERR_BURST_WRITE BIT(6)
+#define ERR_SMALL_HEIGHT BIT(5)
+#define ERR_SMALL_LEN BIT(4)
+#define ERR_MISSING_VSYNC BIT(3)
+#define ERR_MISSING_HSYNC BIT(2)
+#define ERR_MISSING_DATA BIT(1)
+#define VSG_RUNNING BIT(0)
+
+#define VID_VCA_SETTING1 0xf4
+#define BURST_LP BIT(16)
+#define MAX_BURST_LIMIT(x) (x)
+
+#define VID_VCA_SETTING2 0xf8
+#define MAX_LINE_LIMIT(x) ((x) << 16)
+#define EXACT_BURST_LIMIT(x) (x)
+
+#define TVG_CTL 0xfc
+#define TVG_STRIPE_SIZE(x) ((x) << 5)
+#define TVG_MODE_MASK GENMASK(4, 3)
+#define TVG_MODE_SINGLE_COLOR (0 << 3)
+#define TVG_MODE_VSTRIPES (2 << 3)
+#define TVG_MODE_HSTRIPES (3 << 3)
+#define TVG_STOPMODE_MASK GENMASK(2, 1)
+#define TVG_STOPMODE_EOF (0 << 1)
+#define TVG_STOPMODE_EOL (1 << 1)
+#define TVG_STOPMODE_NOW (2 << 1)
+#define TVG_RUN BIT(0)
+
+#define TVG_IMG_SIZE 0x100
+#define TVG_NBLINES(x) ((x) << 16)
+#define TVG_LINE_SIZE(x) (x)
+
+#define TVG_COLOR1 0x104
+#define TVG_COL1_GREEN(x) ((x) << 12)
+#define TVG_COL1_RED(x) (x)
+
+#define TVG_COLOR1_BIS 0x108
+#define TVG_COL1_BLUE(x) (x)
+
+#define TVG_COLOR2 0x10c
+#define TVG_COL2_GREEN(x) ((x) << 12)
+#define TVG_COL2_RED(x) (x)
+
+#define TVG_COLOR2_BIS 0x110
+#define TVG_COL2_BLUE(x) (x)
+
+#define TVG_STS 0x114
+#define TVG_STS_RUNNING BIT(0)
+
+#define TBG_CTL 0x118
+#define TBG_MODE_MASK GENMASK(4, 3)
+#define TBG_MODE_START_1B_STOP (0 << 3)
+#define TBG_MODE_START_2B_STOP (1 << 3)
+#define TBG_MODE_START_BURST_CNT_STOP (2 << 3)
+#define TBG_MODE_START_BURST_STOP (3 << 3)
+#define TBG_DATA_SEL BIT(2)
+#define TBG_HS_REQ BIT(1)
+#define TBG_START BIT(0)
+
+#define TBG_SETTING1 0x11c
+#define TBG_SETTING2 0x120
+
+#define TBG_STS 0x124
+#define TBG_STS_RUNNING BIT(0)
+
+#define TVG_TBG_STS_CTL 0x144
+#define TVG_TBG_STS_CLR 0x164
+#define TVG_TBG_STS_FLAG 0x184
+#define TVG_TBG_STS_TBG_RUNNING BIT(1)
+#define TVG_TBG_STS_TVG_RUNNING BIT(0)
+
+#define STS_CTL_EDGE(e) ((e) << 16)
+
+#define DPHY_LANES_MAP 0x198
+#define DAT_REMAP_CFG(b, l) ((l) << ((b) * 8))
+
+#define DPI_IRQ_EN 0x1a0
+#define DPI_IRQ_CLR 0x1a4
+#define DPI_IRQ_STS 0x1a8
+#define PIXEL_BUF_OVERFLOW BIT(0)
+
+#define DPI_CFG 0x1ac
+#define DPI_CFG_FIFO_LEVEL(x) ((x) & GENMASK(15, 0))
+#define DPI_CFG_FIFO_DEPTH(x) ((x) >> 16)
+
+#define DPHY_CFG0 0x1b0
+#define DPHY_C_RSTB BIT(20)
+#define DPHY_D_RSTB(x) ((x) << 16)
+#define DPHY_TIF_FORCE_WRITE BIT(12)
+#define DPHY_PLL_PDN BIT(10)
+#define DPHY_CMN_PDN BIT(9)
+#define DPHY_C_PDN BIT(8)
+#define DPHY_D_PDN(x) ((x) << 4)
+#define DPHY_PLL_PSO BIT(1)
+#define DPHY_CMN_PSO BIT(0)
+
+#define DPHY_CFG1 0x1b4
+#define PDHY_PLL_OPDIV(x) ((x) << 20)
+#define PDHY_PLL_IPDIV(x) ((x) << 12)
+#define PDHY_PLL_FBDIV(x) (x)
+
+#define DPHY_PLL_TM_LO 0x1b8
+#define DPHY_PLL_TM_MID 0x1bc
+#define DPHY_PLL_TM_HI 0x1c0
+
+#define DPHY_STATUS 0x1c4
+#define PPI_D_RX_ULPS_ESC(x) ((x) >> 12)
+#define PPI_C_TX_READY_HS BIT(8)
+#define PPI_PLL_LOCK BIT(7)
+#define PPI_PLL_COARSE BIT(6)
+#define PPI_PLL_COARSE_CODE(x) ((x) & GENMASK(5, 0))
+
+#define DPHY_BIST 0x1c8
+#define PSO_BYPASS_CTX_EN BIT(12)
+#define PSO_BYPASS_TX_EN(l) BIT(8 + (l))
+#define BIST_CTX_EN BIT(4)
+#define BIST_TX_EN(l) BIT(l)
+
+#define TEST_GENERIC 0x1cc
+#define TEST_STATUS(x) ((x) >> 16)
+#define TEST_CTRL(x) (x)
+
+#define ID_REG 0x1f0
+#define REV_VENDOR_ID(x) (((x) & GENMASK(31, 20)) >> 20)
+#define REV_PRODUCT_ID(x) (((x) & GENMASK(19, 12)) >> 12)
+#define REV_HW(x) (((x) & GENMASK(11, 8)) >> 8)
+#define REV_MAJOR(x) (((x) & GENMASK(7, 4)) >> 4)
+#define REV_MINOR(x) ((x) & GENMASK(3, 0))
+
+#define DSI_OUTPUT_PORT 0
+#define DSI_INPUT_PORT(inputid) (1 + (inputid))
+
+struct cdns_dsi_output {
+ struct mipi_dsi_device *dev;
+ struct drm_panel *panel;
+ struct drm_bridge *bridge;
+};
+
+enum cdns_dsi_input_id {
+ CDNS_DPI_INPUT = 0,
+};
+
+struct cdns_dsi_input {
+ enum cdns_dsi_input_id id;
+ struct drm_bridge bridge;
+};
+
+struct cdns_dsi {
+ struct mipi_dsi_host base;
+ void __iomem *regs;
+ struct cdns_dsi_input input;
+ struct cdns_dsi_output output;
+ unsigned int direct_cmd_fifo_depth;
+ unsigned int rx_fifo_depth;
+ struct completion direct_cmd_comp;
+ struct clk *pclk;
+ struct clk *sysclk;
+};
+
+static inline struct cdns_dsi *input_to_dsi(struct cdns_dsi_input *input)
+{
+ return container_of(input, struct cdns_dsi, input);
+}
+
+static inline struct cdns_dsi *to_cdns_dsi(struct mipi_dsi_host *host)
+{
+ return container_of(host, struct cdns_dsi, base);
+}
+
+static inline struct cdns_dsi_input *
+bridge_to_cdns_dsi_input(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct cdns_dsi_input, bridge);
+}
+
+static int cdns_dsi_bridge_attach(struct drm_bridge *bridge)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+ struct cdns_dsi_output *output = &dsi->output;
+
+ if (!drm_core_check_feature(bridge->dev, DRIVER_ATOMIC)) {
+ dev_err(dsi->base.dev,
+ "cdns-dsi driver is only compatible with DRM devices
supporting atomic updates");
+ return -ENOTSUPP;
+ }
+
+ return drm_bridge_attach(bridge->encoder, output->bridge, bridge);
+}
+
+static enum drm_mode_status
+cdns_dsi_bridge_mode_valid(struct drm_bridge *bridge,
+ const struct drm_display_mode *mode)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+ struct cdns_dsi_output *output = &dsi->output;
+ int bpp;
+
+ /*
+ * VFP_DSI should be less than VFP_DPI and VFP_DSI should be at
+ * least 1.
+ */
+ if (mode->vtotal - mode->vsync_end < 2)
+ return MODE_V_ILLEGAL;
+
+ /* VSA_DSI = VSA_DPI and must be at least 2. */
+ if (mode->vsync_end - mode->vsync_start < 2)
+ return MODE_V_ILLEGAL;
+
+ /* HACT must be a 32-bits aligned. */
+ bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format);
+ if ((mode->hdisplay * bpp) % 32)
+ return MODE_H_ILLEGAL;
+
+ return MODE_OK;
+}
+
+static void cdns_dsi_bridge_disable(struct drm_bridge *bridge)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+ u32 val;
+
+ val = readl(dsi->regs + MCTL_MAIN_DATA_CTL);
+ val &= ~(IF_VID_SELECT_MASK | IF_VID_MODE | VID_EN | HOST_EOT_GEN |
+ DISP_EOT_GEN);
+ writel(val, dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ val = readl(dsi->regs + MCTL_MAIN_EN) & ~IF_EN(input->id);
+ writel(val, dsi->regs + MCTL_MAIN_EN);
+}
+
+#define DSI_HBP_FRAME_OVERHEAD 12
+#define DSI_HSA_FRAME_OVERHEAD 14
+#define DSI_HFP_FRAME_OVERHEAD 6
+#define DSI_HSS_VSS_VSE_FRAME_OVERHEAD 4
+#define DSI_BLANKING_FRAME_OVERHEAD 6
+#define DSI_NULL_FRAME_OVERHEAD 6
+#define DSI_EOT_PKT_SIZE 4
+
+#define REG_WAKEUP_TIME_NS 800
+#define DPHY_PLL_RATE_HZ 108000000
+
+static void cdns_dsi_bridge_enable(struct drm_bridge *bridge)
+{
+ struct cdns_dsi_input *input = bridge_to_cdns_dsi_input(bridge);
+ struct cdns_dsi *dsi = input_to_dsi(input);
+ struct cdns_dsi_output *output = &dsi->output;
+ u32 hsize0, hsa, hline, tmp, reg_wakeup, div;
+ unsigned long dphy_pll_period, tx_byte_period;
+ struct drm_display_mode *mode;
+ int bpp, nlanes;
+
+ mode = &bridge->encoder->crtc->state->adjusted_mode;
+ bpp = mipi_dsi_pixel_format_to_bpp(output->dev->format);
+ nlanes = output->dev->lanes;
+
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ tmp = mode->crtc_htotal - mode->crtc_hsync_end;
+ else
+ tmp = mode->crtc_htotal - mode->crtc_hsync_start;
+ tmp = (tmp * bpp) / 8;
+ tmp = tmp < DSI_HBP_FRAME_OVERHEAD ? 0 : tmp - DSI_HBP_FRAME_OVERHEAD;
+ hsize0 = HBP_LEN(tmp);
+
+ tmp = mode->crtc_hsync_start - mode->crtc_hdisplay;
+ tmp = (tmp * bpp) / 8;
+ tmp = tmp < DSI_HFP_FRAME_OVERHEAD ? 0 : tmp - DSI_HFP_FRAME_OVERHEAD;
+ hsize0 |= HFP_LEN(tmp);
+
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ tmp = mode->crtc_hsync_end - mode->crtc_hsync_start;
+ else
+ tmp = 0;
+ tmp = (tmp * 8) / bpp;
+ tmp = tmp < DSI_HSA_FRAME_OVERHEAD ? 0 : tmp - DSI_HSA_FRAME_OVERHEAD;
+ hsa = tmp;
+ hsize0 |= HSA_LEN(tmp);
+
+ writel(hsize0, dsi->regs + VID_HSIZE1);
+ writel((mode->crtc_hdisplay * bpp) / 8, dsi->regs + VID_HSIZE2);
+
+ writel(VBP_LEN(mode->crtc_vtotal - mode->crtc_vsync_end - 1) |
+ VFP_LEN(mode->crtc_vsync_start - mode->crtc_vdisplay) |
+ VSA_LEN(mode->crtc_vsync_end - mode->crtc_vsync_start),
+ dsi->regs + VID_VSIZE1);
+ writel(mode->crtc_vdisplay, dsi->regs + VID_VSIZE2);
+
+ hline = (mode->crtc_htotal * bpp) / 8;
+ tmp = hline - DSI_HSA_FRAME_OVERHEAD;
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ tmp -= hsa + DSI_HSA_FRAME_OVERHEAD;
+
+ writel(BLK_LINE_PULSE_PKT_LEN(tmp), dsi->regs + VID_BLKSIZE2);
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ writel(MAX_LINE_LIMIT(tmp - DSI_NULL_FRAME_OVERHEAD),
+ dsi->regs + VID_VCA_SETTING2);
+
+ tmp = hline -
+ (DSI_HSS_VSS_VSE_FRAME_OVERHEAD + DSI_BLANKING_FRAME_OVERHEAD);
+ writel(BLK_LINE_EVENT_PKT_LEN(tmp), dsi->regs + VID_BLKSIZE1);
+ if (!(output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE))
+ writel(MAX_LINE_LIMIT(tmp - DSI_NULL_FRAME_OVERHEAD),
+ dsi->regs + VID_VCA_SETTING2);
+
+ tmp = DIV_ROUND_UP(hline, nlanes) - DIV_ROUND_UP(hsa, nlanes);
+
+ if (!(output->dev->mode_flags & MIPI_DSI_MODE_EOT_PACKET))
+ tmp -= DIV_ROUND_UP(DSI_EOT_PKT_SIZE, nlanes);
+
+ dphy_pll_period = NSEC_PER_SEC / DPHY_PLL_RATE_HZ;
+ tx_byte_period = (dphy_pll_period * 2) / 8;
+ reg_wakeup = REG_WAKEUP_TIME_NS / dphy_pll_period;
+ writel(REG_WAKEUP_TIME(reg_wakeup) | REG_LINE_DURATION(tmp),
+ dsi->regs + VID_DPHY_TIME);
+
+ /*
+ * HSTX and LPRX timeouts are both expressed in TX byte clk cycles and
+ * both should be set to at least the time it takes to transmit a
+ * frame.
+ */
+ tmp = NSEC_PER_SEC / mode->vrefresh;
+ tmp /= tx_byte_period;
+
+ for (div = 0; div <= CLK_DIV_MAX; div++) {
+ if (tmp <= HSTX_TIMEOUT_MAX)
+ break;
+
+ tmp >>= 1;
+ }
+
+ if (tmp > HSTX_TIMEOUT_MAX)
+ tmp = HSTX_TIMEOUT_MAX;
+
+ writel(CLK_DIV(div) | HSTX_TIMEOUT(tmp),
+ dsi->regs + MCTL_DPHY_TIMEOUT1);
+
+ writel(LPRX_TIMEOUT(tmp), dsi->regs + MCTL_DPHY_TIMEOUT2);
+
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO) {
+ switch (output->dev->format) {
+ case MIPI_DSI_FMT_RGB888:
+ tmp = VID_PIXEL_MODE_RGB888 |
+ VID_DATATYPE(MIPI_DSI_PACKED_PIXEL_STREAM_24);
+ break;
+
+ case MIPI_DSI_FMT_RGB666:
+ tmp = VID_PIXEL_MODE_RGB666 |
+ VID_DATATYPE(MIPI_DSI_PIXEL_STREAM_3BYTE_18);
+ break;
+
+ case MIPI_DSI_FMT_RGB666_PACKED:
+ tmp = VID_PIXEL_MODE_RGB666_PACKED |
+ VID_DATATYPE(MIPI_DSI_PACKED_PIXEL_STREAM_18);
+ break;
+
+ case MIPI_DSI_FMT_RGB565:
+ tmp = VID_PIXEL_MODE_RGB666_PACKED |
+ VID_DATATYPE(MIPI_DSI_PACKED_PIXEL_STREAM_16);
+ break;
+
+ default:
+ dev_err(dsi->base.dev, "Unsupported DSI format\n");
+ return;
+ }
+
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
+ tmp |= SYNC_PULSE_ACTIVE | SYNC_PULSE_HORIZONTAL;
+
+ tmp |= REG_BLKLINE_MODE(REG_BLK_MODE_BLANKING_PKT) |
+ REG_BLKEOL_MODE(REG_BLK_MODE_BLANKING_PKT) |
+ RECOVERY_MODE(RECOVERY_MODE_NEXT_HSYNC);
+
+ writel(tmp, dsi->regs + VID_MAIN_CTL);
+ }
+
+ tmp = readl(dsi->regs + MCTL_MAIN_DATA_CTL);
+ tmp &= ~(IF_VID_SELECT_MASK | HOST_EOT_GEN | IF_VID_MODE);
+
+ if (!(output->dev->mode_flags & MIPI_DSI_MODE_EOT_PACKET))
+ tmp |= HOST_EOT_GEN;
+
+ if (output->dev->mode_flags & MIPI_DSI_MODE_VIDEO)
+ tmp |= IF_VID_MODE | IF_VID_SELECT(input->id) | VID_EN;
+
+ writel(tmp, dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ tmp = readl(dsi->regs + MCTL_MAIN_EN) | IF_EN(input->id);
+ writel(tmp, dsi->regs + MCTL_MAIN_EN);
+}
+
+static const struct drm_bridge_funcs cdns_dsi_bridge_funcs = {
+ .attach = cdns_dsi_bridge_attach,
+ .mode_valid = cdns_dsi_bridge_mode_valid,
+ .disable = cdns_dsi_bridge_disable,
+ .enable = cdns_dsi_bridge_enable,
+};
+
+static int cdns_dsi_init_link(struct cdns_dsi *dsi)
+{
+ struct cdns_dsi_output *output = &dsi->output;
+ unsigned long sysclk_period, ulpout;
+ u32 val;
+ int i;
+
+ writel(0, dsi->regs + MCTL_DPHY_STATIC);
+
+ val = 0;
+ for (i = 1; i < output->dev->lanes; i++)
+ val |= DATA_LANE_EN(i);
+
+ if (!(output->dev->mode_flags & MIPI_DSI_CLOCK_NON_CONTINUOUS))
+ val |= CLK_CONTINUOUS;
+
+ writel(val, dsi->regs + MCTL_MAIN_PHY_CTL);
+
+ /* ULPOUT should be set to 1ms and is expressed in sysclk cycles. */
+ sysclk_period = NSEC_PER_SEC / clk_get_rate(dsi->sysclk);
+ ulpout = DIV_ROUND_UP(NSEC_PER_MSEC, sysclk_period);
+ writel(CLK_LANE_ULPOUT_TIME(ulpout) | DATA_LANE_ULPOUT_TIME(ulpout),
+ dsi->regs + MCTL_ULPOUT_TIME);
+
+ writel(LINK_EN, dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ val = CLK_LANE_EN | PLL_START;
+ for (i = 0; i < output->dev->lanes; i++)
+ val |= DATA_LANE_START(i);
+
+ writel(val, dsi->regs + MCTL_MAIN_EN);
+
+ ndelay(100);
+
+ return 0;
+}
+
+static int cdns_dsi_attach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *dev)
+{
+ struct cdns_dsi *dsi = to_cdns_dsi(host);
+ struct cdns_dsi_output *output = &dsi->output;
+ struct cdns_dsi_input *input = &dsi->input;
+ struct drm_bridge *bridge;
+ struct drm_panel *panel;
+ struct device_node *np;
+ int ret;
+
+ /*
+ * We currently do not support connecting several DSI devices to the
+ * same host. In order to support that we'd need the DRM bridge
+ * framework to allow dynamic reconfiguration of the bridge chain.
+ */
+ if (output->dev)
+ return -EBUSY;
+
+ /* We do not support burst mode yet. */
+ if (dev->mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
+ return -ENOTSUPP;
+
+ /*
+ * The host <-> device link might be described using an OF-graph
+ * representation, in this case we extract the device of_node from
+ * this representation, otherwise we use dsidev->dev.of_node which
+ * should have been filled by the core.
+ */
+ np = of_graph_get_remote_node(dsi->base.dev->of_node, DSI_OUTPUT_PORT,
+ dev->channel);
+ if (!np)
+ np = of_node_get(dev->dev.of_node);
+
+ panel = of_drm_find_panel(np);
+ if (panel) {
+ bridge = drm_panel_bridge_add(panel, DRM_MODE_CONNECTOR_DSI);
+ } else {
+ bridge = of_drm_find_bridge(dev->dev.of_node);
+ if (!bridge)
+ bridge = ERR_PTR(-EINVAL);
+ }
+
+ of_node_put(np);
+
+ if (IS_ERR(bridge)) {
+ ret = PTR_ERR(bridge);
+ dev_err(host->dev, "failed to add DSI device %s (err = %d)",
+ dev->name, ret);
+ return ret;
+ }
+
+ output->dev = dev;
+ output->bridge = bridge;
+ output->panel = panel;
+
+ ret = cdns_dsi_init_link(dsi);
+ if (ret)
+ goto err_rst_output;
+
+ /*
+ * The DSI output has been properly configured, we can now safely
+ * register the input to the bridge framework so that it can take place
+ * in a display pipeline.
+ */
+ drm_bridge_add(&input->bridge);
+
+ return 0;
+
+err_rst_output:
+ if (panel)
+ drm_panel_bridge_remove(bridge);
+
+ output->bridge = NULL;
+ output->panel = NULL;
+ output->dev = NULL;
+
+ return ret;
+}
+
+static int cdns_dsi_detach(struct mipi_dsi_host *host,
+ struct mipi_dsi_device *dev)
+{
+ struct cdns_dsi *dsi = to_cdns_dsi(host);
+ struct cdns_dsi_output *output = &dsi->output;
+ struct cdns_dsi_input *input = &dsi->input;
+
+ drm_bridge_remove(&input->bridge);
+ if (output->panel)
+ drm_panel_bridge_remove(output->bridge);
+
+ writel(0, dsi->regs + MCTL_MAIN_EN);
+ writel(0, dsi->regs + MCTL_MAIN_DATA_CTL);
+ writel(0, dsi->regs + MCTL_MAIN_PHY_CTL);
+
+ return 0;
+}
+
+static irqreturn_t cdns_dsi_interrupt(int irq, void *data)
+{
+ struct cdns_dsi *dsi = data;
+ irqreturn_t ret = IRQ_NONE;
+ u32 flag, ctl;
+
+ flag = readl(dsi->regs + DIRECT_CMD_STS_FLAG);
+ if (flag) {
+ ctl = readl(dsi->regs + DIRECT_CMD_STS_CTL);
+ ctl &= ~flag;
+ writel(ctl, dsi->regs + DIRECT_CMD_STS_CTL);
+ complete(&dsi->direct_cmd_comp);
+ ret = IRQ_HANDLED;
+ }
+
+ return ret;
+}
+
+static ssize_t cdns_dsi_transfer(struct mipi_dsi_host *host,
+ const struct mipi_dsi_msg *msg)
+{
+ struct cdns_dsi *dsi = to_cdns_dsi(host);
+ u32 cmd, sts, val, wait = WRITE_COMPLETED, ctl = 0;
+ struct mipi_dsi_packet packet;
+ int ret, i, tx_len, rx_len;
+
+ ret = mipi_dsi_create_packet(&packet, msg);
+ if (ret)
+ return ret;
+
+ tx_len = msg->tx_buf ? msg->tx_len : 0;
+ rx_len = msg->rx_buf ? msg->rx_len : 0;
+
+ /* For read operations, the maximum TX len is 2. */
+ if (rx_len && tx_len > 2)
+ return -ENOTSUPP;
+
+ /* TX len is limited by the CMD FIFO depth. */
+ if (tx_len > dsi->direct_cmd_fifo_depth)
+ return -ENOTSUPP;
+
+ /* RX len is limited by the RX FIFO depth. */
+ if (rx_len > dsi->rx_fifo_depth)
+ return -ENOTSUPP;
+
+ cmd = CMD_SIZE(tx_len) | CMD_VCHAN_ID(msg->channel) |
+ CMD_DATATYPE(msg->type);
+
+ if (msg->flags & MIPI_DSI_MSG_USE_LPM)
+ cmd |= CMD_LP_EN;
+
+ if (mipi_dsi_packet_format_is_long(msg->type))
+ cmd |= CMD_LONG;
+
+ if (rx_len) {
+ cmd |= READ_CMD;
+ wait = READ_COMPLETED_WITH_ERR | READ_COMPLETED;
+ ctl = READ_EN | BTA_EN;
+ } else if (msg->flags & MIPI_DSI_MSG_REQ_ACK) {
+ cmd |= BTA_REQ;
+ wait = ACK_WITH_ERR_RCVD | ACK_RCVD;
+ ctl = BTA_EN;
+ }
+
+ writel(readl(dsi->regs + MCTL_MAIN_DATA_CTL) | ctl,
+ dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ writel(cmd, dsi->regs + DIRECT_CMD_MAIN_SETTINGS);
+
+ for (i = 0; i < tx_len; i += 4) {
+ const u8 *buf = msg->tx_buf;
+ int j;
+
+ val = 0;
+ for (j = 0; j < 4 && j + i < tx_len; j++)
+ val |= (u32)buf[i + j] << (8 * j);
+
+ writel(val, dsi->regs + DIRECT_CMD_WRDATA);
+ }
+
+ /* Clear status flags before sending the command. */
+ writel(wait, dsi->regs + DIRECT_CMD_STS_CLR);
+ writel(wait, dsi->regs + DIRECT_CMD_STS_CTL);
+ reinit_completion(&dsi->direct_cmd_comp);
+ writel(0, dsi->regs + DIRECT_CMD_SEND);
+
+ wait_for_completion_timeout(&dsi->direct_cmd_comp,
+ msecs_to_jiffies(1000));
+
+ sts = readl(dsi->regs + DIRECT_CMD_STS);
+ writel(wait, dsi->regs + DIRECT_CMD_STS_CLR);
+ writel(0, dsi->regs + DIRECT_CMD_STS_CTL);
+
+ writel(readl(dsi->regs + MCTL_MAIN_DATA_CTL) & ~ctl,
+ dsi->regs + MCTL_MAIN_DATA_CTL);
+
+ /* We did not receive the events we were waiting for. */
+ if (!(sts & wait))
+ return -ETIMEDOUT;
+
+ /* READ of WRITE with ACK failed. */
+ if (sts & (READ_COMPLETED_WITH_ERR | ACK_WITH_ERR_RCVD))
+ return -EIO;
+
+ for (i = 0; i < rx_len; i += 4) {
+ u8 *buf = msg->rx_buf;
+ int j;
+
+ val = readl(dsi->regs + DIRECT_CMD_RDDATA);
+ for (j = 0; j < 4 && j + i < rx_len; j++)
+ buf[i + j] = val >> (8 * j);
+ }
+
+ return 0;
+}
+
+static const struct mipi_dsi_host_ops cdns_dsi_ops = {
+ .attach = cdns_dsi_attach,
+ .detach = cdns_dsi_detach,
+ .transfer = cdns_dsi_transfer,
+};
+
+static int cdns_dsi_drm_probe(struct platform_device *pdev)
+{
+ struct cdns_dsi *dsi;
+ struct cdns_dsi_input *input;
+ struct resource *res;
+ int ret, irq;
+ u32 val;
+
+ dsi = devm_kzalloc(&pdev->dev, sizeof(*dsi), GFP_KERNEL);
+ if (!dsi)
+ return -ENOMEM;
+
+ input = &dsi->input;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ dsi->regs = devm_ioremap_resource(&pdev->dev, res);
+ if (IS_ERR(dsi->regs))
+ return PTR_ERR(dsi->regs);
+
+ dsi->pclk = devm_clk_get(&pdev->dev, "pclk");
+ if (IS_ERR(dsi->pclk))
+ return PTR_ERR(dsi->pclk);
+
+ dsi->sysclk = devm_clk_get(&pdev->dev, "sysclk");
+ if (IS_ERR(dsi->sysclk))
+ return PTR_ERR(dsi->sysclk);
+
+ irq = platform_get_irq(pdev, 0);
+ if (irq < 0)
+ return irq;
+
+ ret = clk_prepare_enable(dsi->pclk);
+ if (ret)
+ return ret;
+
+ ret = clk_prepare_enable(dsi->sysclk);
+ if (ret)
+ goto err_dis_pclk;
+
+ val = readl(dsi->regs + ID_REG);
+ if (REV_VENDOR_ID(val) != 0xcad) {
+ dev_err(&pdev->dev, "invalid vendor id\n");
+ return -EINVAL;
+ }
+
+ val = readl(dsi->regs + IP_CONF);
+ dsi->direct_cmd_fifo_depth = 1 << (DIRCMD_FIFO_DEPTH(val) + 2);
+ dsi->rx_fifo_depth = RX_FIFO_DEPTH(val);
+ init_completion(&dsi->direct_cmd_comp);
+
+ writel(0, dsi->regs + MCTL_MAIN_DATA_CTL);
+ writel(0, dsi->regs + MCTL_MAIN_EN);
+ writel(0, dsi->regs + MCTL_MAIN_PHY_CTL);
+
+ /*
+ * We only support the DPI input, so force input->id to
+ * CDNS_DPI_INPUT.
+ */
+ input->id = CDNS_DPI_INPUT;
+ input->bridge.funcs = &cdns_dsi_bridge_funcs;
+ input->bridge.of_node = pdev->dev.of_node;
+
+ /* Mask all interrupts before registering the IRQ handler. */
+ writel(0, dsi->regs + MCTL_MAIN_STS_CTL);
+ writel(0, dsi->regs + MCTL_DPHY_ERR_CTL1);
+ writel(0, dsi->regs + CMD_MODE_STS_CTL);
+ writel(0, dsi->regs + DIRECT_CMD_STS_CTL);
+ writel(0, dsi->regs + DIRECT_CMD_RD_STS_CTL);
+ writel(0, dsi->regs + VID_MODE_STS_CTL);
+ writel(0, dsi->regs + TVG_TBG_STS_CTL);
+ writel(0, dsi->regs + DPI_IRQ_EN);
+ ret = devm_request_irq(&pdev->dev, irq, cdns_dsi_interrupt, 0,
+ dev_name(&pdev->dev), dsi);
+ if (ret)
+ goto err_dis_sysclk;
+
+ dsi->base.dev = &pdev->dev;
+ dsi->base.ops = &cdns_dsi_ops;
+
+ ret = mipi_dsi_host_register(&dsi->base);
+ if (ret)
+ goto err_dis_sysclk;
+
+ platform_set_drvdata(pdev, dsi);
+
+ return 0;
+
+err_dis_sysclk:
+ clk_disable_unprepare(dsi->sysclk);
+
+err_dis_pclk:
+ clk_disable_unprepare(dsi->pclk);
+
+ return ret;
+}
+
+static int cdns_dsi_drm_remove(struct platform_device *pdev)
+{
+ struct cdns_dsi *dsi = platform_get_drvdata(pdev);
+
+ mipi_dsi_host_unregister(&dsi->base);
+ clk_disable_unprepare(dsi->sysclk);
+ clk_disable_unprepare(dsi->pclk);
+
+ return 0;
+}
+
+static const struct of_device_id cdns_dsi_of_match[] = {
+ { .compatible = "cdns,dsi-1.3.1" },
+ { },
+};
+
+static struct platform_driver cdns_dsi_platform_driver = {
+ .probe = cdns_dsi_drm_probe,
+ .remove = cdns_dsi_drm_remove,
+ .driver = {
+ .name = "cdns-dsi",
+ .of_match_table = cdns_dsi_of_match,
+ },
+};
+module_platform_driver(cdns_dsi_platform_driver);
+
+MODULE_AUTHOR("Boris Brezillon <boris.brezil...@free-electrons.com>");
+MODULE_DESCRIPTION("Cadence DSI driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:cdns-dsi");
+
--
2.11.0
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
