[PATCH v9 15/22] drm/mediatek: dpi: Add dpintf support

Guillaume Ranquet
2022-03-27T22:48:05Z

dpintf is the displayport interface hardware unit. This unit is similar
to dpi and can reuse most of the code.

This patch adds support for mt8195-dpintf to this dpi driver. Main
differences are:
- Some features/functional components are not available for dpintf
which are now excluded from code execution once is_dpintf is set
- dpintf can and needs to choose between different clockdividers based
on the clockspeed. This is done by choosing a different clock parent.
- There are two additional clocks that need to be managed. These are
only set for dpintf and will be set to NULL if not supplied. The
clk_* calls handle these as normal clocks then.
- Some register contents differ slightly between the two components. To
work around this I added register bits/masks with a DPINTF_ prefix
and use them where different.

Based on a separate driver for dpintf created by
Jason-JH.Lin <jason-jh.lin@mediatek.com>.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
drivers/gpu/drm/mediatek/mtk_dpi.c | 78 ++++++++++++++++++---
drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 38 ++++++++++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 8 +++
drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h | 1 +
drivers/gpu/drm/mediatek/mtk_drm_drv.c | 5 +-
include/linux/soc/mediatek/mtk-mmsys.h | 2 +
6 files changed, 120 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
index eb969c5c5c2e..8198d3cf23ac 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -126,6 +126,7 @@ struct mtk_dpi_conf {
const u32 *output_fmts;
u32 num_output_fmts;
bool is_ck_de_pol;
+ bool is_dpintf;
bool swap_input_support;
/* Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH (no shift) */
u32 dimension_mask;
@@ -498,11 +499,11 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,

vm.pixelclock = pll_rate / factor;
if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
- (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
+ (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) {
clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2);
- else
+ } else {
clk_set_rate(dpi->pixel_clk, vm.pixelclock);
-
+ }

vm.pixelclock = clk_get_rate(dpi->pixel_clk);

@@ -515,9 +516,15 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
- hsync.sync_width = vm.hsync_len;
- hsync.back_porch = vm.hback_porch;
- hsync.front_porch = vm.hfront_porch;
+ if (dpi->conf->is_dpintf) {
+ hsync.sync_width = vm.hsync_len / 4;
+ hsync.back_porch = vm.hback_porch / 4;
+ hsync.front_porch = vm.hfront_porch / 4;
+ } else {
+ hsync.sync_width = vm.hsync_len;
+ hsync.back_porch = vm.hback_porch;
+ hsync.front_porch = vm.hfront_porch;
+ }
hsync.shift_half_line = false;
vsync_lodd.sync_width = vm.vsync_len;
vsync_lodd.back_porch = vm.vback_porch;
@@ -559,13 +566,20 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
mtk_dpi_config_channel_limit(dpi);
mtk_dpi_config_bit_num(dpi, dpi->bit_num);
mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
- mtk_dpi_config_yc_map(dpi, dpi->yc_map);
mtk_dpi_config_color_format(dpi, dpi->color_format);
- mtk_dpi_config_2n_h_fre(dpi);
- mtk_dpi_dual_edge(dpi);
- mtk_dpi_config_disable_edge(dpi);
+ if (dpi->conf->is_dpintf) {
+ mtk_dpi_mask(dpi, DPI_CON, DPINTF_INPUT_2P_EN,
+ DPINTF_INPUT_2P_EN);
+ } else {
+ mtk_dpi_config_yc_map(dpi, dpi->yc_map);
+ mtk_dpi_config_2n_h_fre(dpi);
+ mtk_dpi_dual_edge(dpi);
+ mtk_dpi_config_disable_edge(dpi);
+ }
mtk_dpi_sw_reset(dpi, false);

+ mtk_dpi_enable(dpi);
+
return 0;
}

@@ -642,7 +656,10 @@ static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
- dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
+ if (out_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
+ dpi->color_format = MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL;
+ else
+ dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;

return 0;
}
@@ -801,6 +818,16 @@ static unsigned int mt8183_calculate_factor(int clock)
return 2;
}

+static unsigned int mt8195_dpintf_calculate_factor(int clock)
+{
+ if (clock < 70000)
+ return 4;
+ else if (clock < 200000)
+ return 2;
+ else
+ return 1;
+}
+
static const u32 mt8173_output_fmts[] = {
MEDIA_BUS_FMT_RGB888_1X24,
};
@@ -810,6 +837,12 @@ static const u32 mt8183_output_fmts[] = {
MEDIA_BUS_FMT_RGB888_2X12_BE,
};

+static const u32 mt8195_output_fmts[] = {
+ MEDIA_BUS_FMT_RGB888_1X24,
+ MEDIA_BUS_FMT_YUV8_1X24,
+ MEDIA_BUS_FMT_YUYV8_1X16,
+};
+
static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
.c_bottom = 0x0010,
.c_top = 0x0FE0,
@@ -817,6 +850,13 @@ static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
.y_top = 0x0FE0,
};

+static const struct mtk_dpi_yc_limit mtk_dpintf_limit = {
+ .c_bottom = 0x0000,
+ .c_top = 0xFFF,
+ .y_bottom = 0x0000,
+ .y_top = 0xFFF,
+};
+
static const struct mtk_dpi_conf mt8173_conf = {
.cal_factor = mt8173_calculate_factor,
.reg_h_fre_con = 0xe0,
@@ -882,6 +922,19 @@ static const struct mtk_dpi_conf mt8192_conf = {
.limit = &mtk_dpi_limit,
};

+static const struct mtk_dpi_conf mt8195_dpintf_conf = {
+ .cal_factor = mt8195_dpintf_calculate_factor,
+ .output_fmts = mt8195_output_fmts,
+ .num_output_fmts = ARRAY_SIZE(mt8195_output_fmts),
+ .is_dpintf = true,
+ .dimension_mask = DPINTF_HPW_MASK,
+ .hvsize_mask = DPINTF_HSIZE_MASK,
+ .channel_swap_shift = DPINTF_CH_SWAP,
+ .yuv422_en_bit = DPINTF_YUV422_EN,
+ .csc_enable_bit = DPINTF_CSC_ENABLE,
+ .limit = &mtk_dpintf_limit,
+};
+
static int mtk_dpi_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -1004,6 +1057,9 @@ static const struct of_device_id mtk_dpi_of_ids[] = {
{ .compatible = "mediatek,mt8192-dpi",
.data = &mt8192_conf,
},
+ { .compatible = "mediatek,mt8195-dpintf",
+ .data = &mt8195_dpintf_conf,
+ },
{ },
};
MODULE_DEVICE_TABLE(of, mtk_dpi_of_ids);
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
index 3a02fabe1662..91b32dfffced 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
+++ b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
@@ -40,10 +40,15 @@
#define FAKE_DE_LEVEN BIT(21)
#define FAKE_DE_RODD BIT(22)
#define FAKE_DE_REVEN BIT(23)
+#define DPINTF_YUV422_EN BIT(24)
+#define DPINTF_CSC_ENABLE BIT(26)
+#define DPINTF_INPUT_2P_EN BIT(29)

#define DPI_OUTPUT_SETTING 0x14
#define CH_SWAP 0
+#define DPINTF_CH_SWAP BIT(1)
#define CH_SWAP_MASK (0x7 << 0)
+#define DPINTF_CH_SWAP_MASK (0x7 << 1)
#define SWAP_RGB 0x00
#define SWAP_GBR 0x01
#define SWAP_BRG 0x02
@@ -80,8 +85,10 @@
#define DPI_SIZE 0x18
#define HSIZE 0
#define HSIZE_MASK (0x1FFF << 0)
+#define DPINTF_HSIZE_MASK (0xFFFF << 0)
#define VSIZE 16
#define VSIZE_MASK (0x1FFF << 16)
+#define DPINTF_VSIZE_MASK (0xFFFF << 16)

#define DPI_DDR_SETTING 0x1C
#define DDR_EN BIT(0)
@@ -93,24 +100,30 @@
#define DPI_TGEN_HWIDTH 0x20
#define HPW 0
#define HPW_MASK (0xFFF << 0)
+#define DPINTF_HPW_MASK (0xFFFF << 0)

#define DPI_TGEN_HPORCH 0x24
#define HBP 0
#define HBP_MASK (0xFFF << 0)
+#define DPINTF_HBP_MASK (0xFFFF << 0)
#define HFP 16
#define HFP_MASK (0xFFF << 16)
+#define DPINTF_HFP_MASK (0xFFFF << 16)

#define DPI_TGEN_VWIDTH 0x28
#define DPI_TGEN_VPORCH 0x2C

#define VSYNC_WIDTH_SHIFT 0
#define VSYNC_WIDTH_MASK (0xFFF << 0)
+#define DPINTF_VSYNC_WIDTH_MASK (0xFFFF << 0)
#define VSYNC_HALF_LINE_SHIFT 16
#define VSYNC_HALF_LINE_MASK BIT(16)
#define VSYNC_BACK_PORCH_SHIFT 0
#define VSYNC_BACK_PORCH_MASK (0xFFF << 0)
+#define DPINTF_VSYNC_BACK_PORCH_MASK (0xFFFF << 0)
#define VSYNC_FRONT_PORCH_SHIFT 16
#define VSYNC_FRONT_PORCH_MASK (0xFFF << 16)
+#define DPINTF_VSYNC_FRONT_PORCH_MASK (0xFFFF << 16)

#define DPI_BG_HCNTL 0x30
#define BG_RIGHT (0x1FFF << 0)
@@ -217,4 +230,29 @@

#define EDGE_SEL_EN BIT(5)
#define H_FRE_2N BIT(25)
+
+#define DPI_MATRIX_SET 0xB4
+#define INT_MATRIX_SEL BIT(0)
+#define INT_MATRIX_SEL_MASK (0x1F << 0)
+#define RGB_TO_JPEG 0x00
+#define RGB_TO_FULL709 0x01
+#define RGB_TO_BT601 0x02
+#define RGB_TO_BT709 0x03
+#define JPEG_TO_RGB 0x04
+#define FULL709_TO_RGB 0x05
+#define BT601_TO_RGB 0x06
+#define BT709_TO_RGB 0x07
+#define JPEG_TO_BT601 0x08
+#define JPEG_TO_BT709 0x09
+#define BT601_TO_JPEG 0xA
+#define BT709_TO_JPEG 0xB
+#define BT709_TO_BT601 0xC
+#define BT601_TO_BT709 0xD
+#define JPEG_TO_CERGB 0x14
+#define FULL709_TO_CERGB 0x15
+#define BT601_TO_CERGB 0x16
+#define BT709_TO_CERGB 0x17
+#define RGB_TO_CERGB 0x1C
+#define MATRIX_BIT BIT(8)
+#define EXT_MATRIX_EN BIT(12)
#endif /* __MTK_DPI_REGS_H */
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 2e99aee13dfe..558fc2733358 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -351,6 +351,11 @@ static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
[MTK_DISP_WDMA] = "wdma",
[MTK_DPI] = "dpi",
[MTK_DSI] = "dsi",
+ [MTK_DP_INTF] = "dp-intf",
+ [MTK_DISP_PWM] = "pwm",
+ [MTK_DISP_MUTEX] = "mutex",
+ [MTK_DISP_OD] = "od",
+ [MTK_DISP_BLS] = "bls",
};

struct mtk_ddp_comp_match {
@@ -369,6 +374,8 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
[DDP_COMPONENT_DITHER] = { MTK_DISP_DITHER, 0, &ddp_dither },
[DDP_COMPONENT_DPI0] = { MTK_DPI, 0, &ddp_dpi },
[DDP_COMPONENT_DPI1] = { MTK_DPI, 1, &ddp_dpi },
+ [DDP_COMPONENT_DP_INTF0] = { MTK_DP_INTF, 0, &ddp_dpi },
+ [DDP_COMPONENT_DP_INTF1] = { MTK_DP_INTF, 1, &ddp_dpi },
[DDP_COMPONENT_DSI0] = { MTK_DSI, 0, &ddp_dsi },
[DDP_COMPONENT_DSI1] = { MTK_DSI, 1, &ddp_dsi },
[DDP_COMPONENT_DSI2] = { MTK_DSI, 2, &ddp_dsi },
@@ -481,6 +488,7 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
type == MTK_DISP_PWM ||
type == MTK_DISP_RDMA ||
type == MTK_DPI ||
+ type == MTK_DP_INTF ||
type == MTK_DSI)
return 0;

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index ad267bb8fc9b..43ad74be509e 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -34,6 +34,7 @@ enum mtk_ddp_comp_type {
MTK_DISP_UFOE,
MTK_DISP_WDMA,
MTK_DPI,
+ MTK_DP_INTF,
MTK_DSI,
MTK_DDP_COMP_TYPE_MAX,
};
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 247c6ff277ef..c8a233f609f0 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -509,6 +509,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
.data = (void *)MTK_DPI },
{ .compatible = "mediatek,mt8183-dpi",
.data = (void *)MTK_DPI },
+ { .compatible = "mediatek,mt8195-dpintf",
+ .data = (void *)MTK_DP_INTF },
{ .compatible = "mediatek,mt2701-dsi",
.data = (void *)MTK_DSI },
{ .compatible = "mediatek,mt8173-dsi",
@@ -609,7 +611,8 @@ static int mtk_drm_probe(struct platform_device *pdev)
comp_type == MTK_DISP_OVL_2L ||
comp_type == MTK_DISP_RDMA ||
comp_type == MTK_DPI ||
- comp_type == MTK_DSI) {
+ comp_type == MTK_DPI ||
+ comp_type == MTK_DP_INTF) {
dev_info(dev, "Adding component match for %pOF\n",
node);
drm_of_component_match_add(dev, &match, component_compare_of,
diff --git a/include/linux/soc/mediatek/mtk-mmsys.h b/include/linux/soc/mediatek/mtk-mmsys.h
index 4bba275e235a..56ed2fa5f59e 100644
--- a/include/linux/soc/mediatek/mtk-mmsys.h
+++ b/include/linux/soc/mediatek/mtk-mmsys.h
@@ -19,6 +19,8 @@ enum mtk_ddp_comp_id {
DDP_COMPONENT_DITHER,
DDP_COMPONENT_DPI0,
DDP_COMPONENT_DPI1,
+ DDP_COMPONENT_DP_INTF0,
+ DDP_COMPONENT_DP_INTF1,
DDP_COMPONENT_DSI0,
DDP_COMPONENT_DSI1,
DDP_COMPONENT_DSI2,
--
2.34.1