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....@mediatek.com>.

Signed-off-by: Markus Schneider-Pargmann <m...@baylibre.com>
---

Notes:
    Changes v4 -> v5:
    - Add several fields to characterize what is supported and what isn't in 
dpintf
      vs dpi.
    - Remove false bool field assignments where not necessary.
    - Removed specific clocks and reduced them to the standard engine and pixel
      clocks.
    - Remove extra set of bridge functions and define output formats for mt8195
    - Define register masks to avoid using is_dpintf variable.
    - Extract the limits into mtk_dpi_conf to avoid using is_dpintf.
    
    Changes RFC -> v1:
    - Remove setting parents and fully rely on the clock tree instead which 
already
      models a mux at the important place.
    - Integrated mtk_dpi dpintf changes into the mediatek drm driver.

 drivers/gpu/drm/mediatek/mtk_dpi.c          | 199 +++++++++++++++-----
 drivers/gpu/drm/mediatek/mtk_dpi_regs.h     |  12 ++
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c |   4 +
 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, 176 insertions(+), 47 deletions(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c 
b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 4554e2de1430..384074f69111 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
@@ -125,6 +125,17 @@ struct mtk_dpi_conf {
        bool edge_sel_en;
        const u32 *output_fmts;
        u32 num_output_fmts;
+       bool is_ck_de_pol;
+       bool is_dpintf;
+       bool csc_support;
+       bool swap_input_support;
+       // Mask used for HWIDTH, HPORCH, VSYNC_WIDTH and VSYNC_PORCH (no shift)
+       u32 dimension_mask;
+       // Mask used for HSIZE and VSIZE (no shift)
+       u32 hvsize_mask;
+       u32 channel_swap_shift;
+       u32 yuv422_en_bit;
+       const struct mtk_dpi_yc_limit *limit;
 };
 
 static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
@@ -153,30 +164,30 @@ static void mtk_dpi_disable(struct mtk_dpi *dpi)
 static void mtk_dpi_config_hsync(struct mtk_dpi *dpi,
                                 struct mtk_dpi_sync_param *sync)
 {
-       mtk_dpi_mask(dpi, DPI_TGEN_HWIDTH,
-                    sync->sync_width << HPW, HPW_MASK);
-       mtk_dpi_mask(dpi, DPI_TGEN_HPORCH,
-                    sync->back_porch << HBP, HBP_MASK);
+       mtk_dpi_mask(dpi, DPI_TGEN_HWIDTH, sync->sync_width << HPW,
+                    dpi->conf->dimension_mask << HPW);
+       mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->back_porch << HBP,
+                    dpi->conf->dimension_mask << HBP);
        mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->front_porch << HFP,
-                    HFP_MASK);
+                    dpi->conf->dimension_mask << HFP);
 }
 
 static void mtk_dpi_config_vsync(struct mtk_dpi *dpi,
                                 struct mtk_dpi_sync_param *sync,
                                 u32 width_addr, u32 porch_addr)
 {
-       mtk_dpi_mask(dpi, width_addr,
-                    sync->sync_width << VSYNC_WIDTH_SHIFT,
-                    VSYNC_WIDTH_MASK);
        mtk_dpi_mask(dpi, width_addr,
                     sync->shift_half_line << VSYNC_HALF_LINE_SHIFT,
                     VSYNC_HALF_LINE_MASK);
+       mtk_dpi_mask(dpi, width_addr,
+                    sync->sync_width << VSYNC_WIDTH_SHIFT,
+                    dpi->conf->dimension_mask << VSYNC_WIDTH_SHIFT);
        mtk_dpi_mask(dpi, porch_addr,
                     sync->back_porch << VSYNC_BACK_PORCH_SHIFT,
-                    VSYNC_BACK_PORCH_MASK);
+                    dpi->conf->dimension_mask << VSYNC_BACK_PORCH_SHIFT);
        mtk_dpi_mask(dpi, porch_addr,
                     sync->front_porch << VSYNC_FRONT_PORCH_SHIFT,
-                    VSYNC_FRONT_PORCH_MASK);
+                    dpi->conf->dimension_mask << VSYNC_FRONT_PORCH_SHIFT);
 }
 
 static void mtk_dpi_config_vsync_lodd(struct mtk_dpi *dpi,
@@ -210,13 +221,20 @@ static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
                               struct mtk_dpi_polarities *dpi_pol)
 {
        unsigned int pol;
+       unsigned int mask;
 
-       pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) |
-             (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ? 0 : DE_POL) |
-             (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
+       mask = HSYNC_POL | VSYNC_POL;
+       pol = (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
              (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
-       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol,
-                    CK_POL | DE_POL | HSYNC_POL | VSYNC_POL);
+       if (dpi->conf->is_ck_de_pol) {
+               mask |= CK_POL | DE_POL;
+               pol |= (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ?
+                       0 : CK_POL) |
+                      (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ?
+                       0 : DE_POL);
+       }
+
+       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol, mask);
 }
 
 static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
@@ -231,13 +249,16 @@ static void mtk_dpi_config_interface(struct mtk_dpi *dpi, 
bool inter)
 
 static void mtk_dpi_config_fb_size(struct mtk_dpi *dpi, u32 width, u32 height)
 {
-       mtk_dpi_mask(dpi, DPI_SIZE, width << HSIZE, HSIZE_MASK);
-       mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE, VSIZE_MASK);
+       mtk_dpi_mask(dpi, DPI_SIZE, width << HSIZE,
+                    dpi->conf->hvsize_mask << HSIZE);
+       mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE,
+                    dpi->conf->hvsize_mask << VSIZE);
 }
 
-static void mtk_dpi_config_channel_limit(struct mtk_dpi *dpi,
-                                        struct mtk_dpi_yc_limit *limit)
+static void mtk_dpi_config_channel_limit(struct mtk_dpi *dpi)
 {
+       const struct mtk_dpi_yc_limit *limit = dpi->conf->limit;
+
        mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_bottom << Y_LIMINT_BOT,
                     Y_LIMINT_BOT_MASK);
        mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_top << Y_LIMINT_TOP,
@@ -332,12 +353,14 @@ static void mtk_dpi_config_channel_swap(struct mtk_dpi 
*dpi,
                break;
        }
 
-       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << CH_SWAP, CH_SWAP_MASK);
+       mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << CH_SWAP,
+                    CH_SWAP_MASK << dpi->conf->channel_swap_shift);
 }
 
 static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool enable)
 {
-       mtk_dpi_mask(dpi, DPI_CON, enable ? YUV422_EN : 0, YUV422_EN);
+       mtk_dpi_mask(dpi, DPI_CON, enable ? dpi->conf->yuv422_en_bit : 0,
+                    dpi->conf->yuv422_en_bit);
 }
 
 static void mtk_dpi_config_csc_enable(struct mtk_dpi *dpi, bool enable)
@@ -367,19 +390,25 @@ static void mtk_dpi_config_color_format(struct mtk_dpi 
*dpi,
        if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_444) ||
            (format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
                mtk_dpi_config_yuv422_enable(dpi, false);
-               mtk_dpi_config_csc_enable(dpi, true);
-               mtk_dpi_config_swap_input(dpi, false);
+               if (dpi->conf->csc_support)
+                       mtk_dpi_config_csc_enable(dpi, true);
+               if (dpi->conf->swap_input_support)
+                       mtk_dpi_config_swap_input(dpi, false);
                mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
        } else if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_422) ||
                   (format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
                mtk_dpi_config_yuv422_enable(dpi, true);
-               mtk_dpi_config_csc_enable(dpi, true);
-               mtk_dpi_config_swap_input(dpi, true);
+               if (dpi->conf->csc_support)
+                       mtk_dpi_config_csc_enable(dpi, true);
+               if (dpi->conf->swap_input_support)
+                       mtk_dpi_config_swap_input(dpi, true);
                mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
        } else {
                mtk_dpi_config_yuv422_enable(dpi, false);
-               mtk_dpi_config_csc_enable(dpi, false);
-               mtk_dpi_config_swap_input(dpi, false);
+               if (dpi->conf->csc_support)
+                       mtk_dpi_config_csc_enable(dpi, false);
+               if (dpi->conf->swap_input_support)
+                       mtk_dpi_config_swap_input(dpi, false);
                mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
        }
 }
@@ -449,7 +478,6 @@ static int mtk_dpi_power_on(struct mtk_dpi *dpi)
 static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
                                    struct drm_display_mode *mode)
 {
-       struct mtk_dpi_yc_limit limit;
        struct mtk_dpi_polarities dpi_pol;
        struct mtk_dpi_sync_param hsync;
        struct mtk_dpi_sync_param vsync_lodd = { 0 };
@@ -472,32 +500,34 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
        pll_rate = clk_get_rate(dpi->tvd_clk);
 
        vm.pixelclock = pll_rate / factor;
-       if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
-           (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
+       if (dpi->conf->is_dpintf)
+               clk_set_rate(dpi->pixel_clk, vm.pixelclock / 4);
+       else if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
+                (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
                clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2);
        else
                clk_set_rate(dpi->pixel_clk, vm.pixelclock);
 
-
        vm.pixelclock = clk_get_rate(dpi->pixel_clk);
 
        dev_dbg(dpi->dev, "Got  PLL %lu Hz, pixel clock %lu Hz\n",
                pll_rate, vm.pixelclock);
 
-       limit.c_bottom = 0x0010;
-       limit.c_top = 0x0FE0;
-       limit.y_bottom = 0x0010;
-       limit.y_top = 0x0FE0;
-
        dpi_pol.ck_pol = MTK_DPI_POLARITY_FALLING;
        dpi_pol.de_pol = MTK_DPI_POLARITY_RISING;
        dpi_pol.hsync_pol = vm.flags & DISPLAY_FLAGS_HSYNC_HIGH ?
                            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;
@@ -536,14 +566,19 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
        else
                mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive);
 
-       mtk_dpi_config_channel_limit(dpi, &limit);
+       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);
 
        return 0;
@@ -667,7 +702,7 @@ mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge,
 {
        struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 
-       if (mode->clock > dpi->conf->max_clock_khz)
+       if (dpi->conf->max_clock_khz && mode->clock > dpi->conf->max_clock_khz)
                return MODE_CLOCK_HIGH;
 
        return MODE_OK;
@@ -781,6 +816,16 @@ 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,
 };
@@ -790,12 +835,34 @@ static const u32 mt8183_output_fmts[] = {
        MEDIA_BUS_FMT_RGB888_2X12_BE,
 };
 
+static const struct mtk_dpi_yc_limit mtk_dpi_limit = {
+       .c_bottom = 0x0010,
+       .c_top = 0x0FE0,
+       .y_bottom = 0x0010,
+       .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,
        .max_clock_khz = 300000,
        .output_fmts = mt8173_output_fmts,
        .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
+       .is_ck_de_pol = true,
+       .csc_support = true,
+       .swap_input_support = true,
+       .dimension_mask = HPW_MASK,
+       .hvsize_mask = HSIZE_MASK,
+       .channel_swap_shift = CH_SWAP,
+       .yuv422_en_bit = YUV422_EN,
+       .limit = &mtk_dpi_limit,
 };
 
 static const struct mtk_dpi_conf mt2701_conf = {
@@ -805,6 +872,14 @@ static const struct mtk_dpi_conf mt2701_conf = {
        .max_clock_khz = 150000,
        .output_fmts = mt8173_output_fmts,
        .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
+       .is_ck_de_pol = true,
+       .csc_support = true,
+       .swap_input_support = true,
+       .dimension_mask = HPW_MASK,
+       .hvsize_mask = HSIZE_MASK,
+       .channel_swap_shift = CH_SWAP,
+       .yuv422_en_bit = YUV422_EN,
+       .limit = &mtk_dpi_limit,
 };
 
 static const struct mtk_dpi_conf mt8183_conf = {
@@ -813,6 +888,14 @@ static const struct mtk_dpi_conf mt8183_conf = {
        .max_clock_khz = 100000,
        .output_fmts = mt8183_output_fmts,
        .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
+       .is_ck_de_pol = true,
+       .csc_support = true,
+       .swap_input_support = true,
+       .dimension_mask = HPW_MASK,
+       .hvsize_mask = HSIZE_MASK,
+       .channel_swap_shift = CH_SWAP,
+       .yuv422_en_bit = YUV422_EN,
+       .limit = &mtk_dpi_limit,
 };
 
 static const struct mtk_dpi_conf mt8192_conf = {
@@ -821,6 +904,26 @@ static const struct mtk_dpi_conf mt8192_conf = {
        .max_clock_khz = 150000,
        .output_fmts = mt8173_output_fmts,
        .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
+       .is_ck_de_pol = true,
+       .csc_support = true,
+       .swap_input_support = true,
+       .dimension_mask = HPW_MASK,
+       .hvsize_mask = HSIZE_MASK,
+       .channel_swap_shift = CH_SWAP,
+       .yuv422_en_bit = YUV422_EN,
+       .limit = &mtk_dpi_limit,
+};
+
+static const struct mtk_dpi_conf mt8195_dpintf_conf = {
+       .cal_factor = mt8195_dpintf_calculate_factor,
+       .output_fmts = mt8173_output_fmts,
+       .num_output_fmts = ARRAY_SIZE(mt8173_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,
+       .limit = &mtk_dpintf_limit,
 };
 
 static int mtk_dpi_probe(struct platform_device *pdev)
@@ -870,7 +973,8 @@ static int mtk_dpi_probe(struct platform_device *pdev)
        if (IS_ERR(dpi->engine_clk)) {
                ret = PTR_ERR(dpi->engine_clk);
                if (ret != -EPROBE_DEFER)
-                       dev_err(dev, "Failed to get engine clock: %d\n", ret);
+                       dev_err(dev, "Failed to get engine clock: %d\n",
+                               ret);
 
                return ret;
        }
@@ -945,6 +1049,9 @@ 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..72efe6ee2584 100644
--- a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
+++ b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
@@ -40,10 +40,14 @@
 #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_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 +84,10 @@
 #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 +99,30 @@
 #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)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c 
b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 99cbf44463e4..da9e059312a5 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -317,6 +317,7 @@ static const char * const 
mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
        [MTK_DISP_UFOE] = "ufoe",
        [MTK_DSI] = "dsi",
        [MTK_DPI] = "dpi",
+       [MTK_DP_INTF] = "dp-intf",
        [MTK_DISP_PWM] = "pwm",
        [MTK_DISP_MUTEX] = "mutex",
        [MTK_DISP_OD] = "od",
@@ -339,6 +340,8 @@ 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 },
@@ -476,6 +479,7 @@ int mtk_ddp_comp_init(struct device_node *node, struct 
mtk_ddp_comp *comp,
            type == MTK_DISP_COLOR ||
            type == MTK_DISP_GAMMA ||
            type == MTK_DPI ||
+           type == MTK_DP_INTF ||
            type == MTK_DSI ||
            type == MTK_DISP_OVL ||
            type == MTK_DISP_OVL_2L ||
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h 
b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index bb914d976cf5..ee9d853cfa1c 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -30,6 +30,7 @@ enum mtk_ddp_comp_type {
        MTK_DISP_UFOE,
        MTK_DSI,
        MTK_DPI,
+       MTK_DP_INTF,
        MTK_DISP_PWM,
        MTK_DISP_MUTEX,
        MTK_DISP_OD,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c 
b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index aec39724ebeb..1ff4e31c8634 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -459,6 +459,8 @@ 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-disp-mutex",
          .data = (void *)MTK_DISP_MUTEX },
        { .compatible = "mediatek,mt2712-disp-mutex",
@@ -569,7 +571,8 @@ static int mtk_drm_probe(struct platform_device *pdev)
                    comp_type == MTK_DISP_OVL_2L ||
                    comp_type == MTK_DISP_RDMA ||
                    comp_type == MTK_DSI ||
-                   comp_type == MTK_DPI) {
+                   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, compare_of,
diff --git a/include/linux/soc/mediatek/mtk-mmsys.h 
b/include/linux/soc/mediatek/mtk-mmsys.h
index 2228bf6133da..920e19968f38 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,
-- 
2.33.0

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