Re: [PATCH v6 10/42] drm/mediatek: Add support for MT8195 Digital Parallel Interface

CK Hu (胡俊光)
2025-02-14T02:35:35Z

On Tue, 2025-02-11 at 12:33 +0100, AngeloGioacchino Del Regno wrote:
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>
>
> Add support for the DPI block found in the MT8195 and MT8188 SoCs.
> Inside of the SoC, this block is directly connected to the HDMI IP.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
> drivers/gpu/drm/mediatek/mtk_dpi.c | 24 ++++++++++++++++++++++++
> drivers/gpu/drm/mediatek/mtk_dpi_regs.h | 6 ++++++
> drivers/gpu/drm/mediatek/mtk_drm_drv.c | 2 ++
> 3 files changed, 32 insertions(+)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c
> index 67504eb874d2..e4b52ffc4414 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c
> @@ -1049,6 +1049,8 @@ static const struct mtk_dpi_factor dpi_factor_mt8195_dp_intf[] = {
> { 70000 - 1, 4 }, { 200000 - 1, 2 }, { U32_MAX, 1 }
> };
>
> +static const struct mtk_dpi_factor dpi_factor_mt8195_dpi = { U32_MAX, 1 };
> +
> static const struct mtk_dpi_conf mt8173_conf = {
> .dpi_factor = dpi_factor_mt8173,
> .num_dpi_factor = ARRAY_SIZE(dpi_factor_mt8173),
> @@ -1141,6 +1143,27 @@ static const struct mtk_dpi_conf mt8192_conf = {
> .csc_enable_bit = CSC_ENABLE,
> };
>
> +static const struct mtk_dpi_conf mt8195_conf = {
> + .dpi_factor = &dpi_factor_mt8195_dpi,

mt8195 dpi would not use dpi_factor, so let it be NULL and drop dpi_factor_mt8195_dpi.
After this,

Reviewed-by: CK Hu <ck.hu@mediatek.com>

> + .num_dpi_factor = 1,
> + .max_clock_khz = 594000,
> + .output_fmts = mt8183_output_fmts,
> + .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
> + .pixels_per_iter = 1,
> + .is_ck_de_pol = true,
> + .swap_input_support = true,
> + .support_direct_pin = true,
> + .dimension_mask = HPW_MASK,
> + .hvsize_mask = HSIZE_MASK,
> + .channel_swap_shift = CH_SWAP,
> + .yuv422_en_bit = YUV422_EN,
> + .csc_enable_bit = CSC_ENABLE,
> + .input_2p_en_bit = DPI_INPUT_2P_EN,
> + .clocked_by_hdmi = true,
> + .input_2pixel = true,
> + .output_1pixel = true,
> +};
> +
> static const struct mtk_dpi_conf mt8195_dpintf_conf = {
> .dpi_factor = dpi_factor_mt8195_dp_intf,
> .num_dpi_factor = ARRAY_SIZE(dpi_factor_mt8195_dp_intf),
> @@ -1245,6 +1268,7 @@ static const struct of_device_id mtk_dpi_of_ids[] = {
> { .compatible = "mediatek,mt8188-dp-intf", .data = &mt8195_dpintf_conf },
> { .compatible = "mediatek,mt8192-dpi", .data = &mt8192_conf },
> { .compatible = "mediatek,mt8195-dp-intf", .data = &mt8195_dpintf_conf },
> + { .compatible = "mediatek,mt8195-dpi", .data = &mt8195_conf },
> { /* sentinel */ },
> };
> 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 a0b1d18bbbf7..3c24d9e9f241 100644
> --- a/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
> +++ b/drivers/gpu/drm/mediatek/mtk_dpi_regs.h
> @@ -40,6 +40,12 @@
> #define FAKE_DE_LEVEN BIT(21)
> #define FAKE_DE_RODD BIT(22)
> #define FAKE_DE_REVEN BIT(23)
> +
> +/* DPI_CON: DPI instances */
> +#define DPI_OUTPUT_1T1P_EN BIT(24)
> +#define DPI_INPUT_2P_EN BIT(25)
> +
> +/* DPI_CON: DPINTF instances */
> #define DPINTF_YUV422_EN BIT(24)
> #define DPINTF_CSC_ENABLE BIT(26)
> #define DPINTF_INPUT_2P_EN BIT(29)
> diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> index f22ad2882697..772c3d0f5d14 100644
> --- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> +++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
> @@ -810,6 +810,8 @@ static const struct of_device_id mtk_ddp_comp_dt_ids[] = {
> .data = (void *)MTK_DPI },
> { .compatible = "mediatek,mt8195-dp-intf",
> .data = (void *)MTK_DP_INTF },
> + { .compatible = "mediatek,mt8195-dpi",
> + .data = (void *)MTK_DPI },
> { .compatible = "mediatek,mt2701-dsi",
> .data = (void *)MTK_DSI },
> { .compatible = "mediatek,mt8173-dsi",
> --
> 2.48.1
>