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

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Message-ID: <20250211113409.1517534-11-angelogioacchino.delregno@collabora.com>
Date: Tue, 11 Feb 2025 12:33:37 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: chunkuang.hu@...nel.org
Cc: p.zabel@...gutronix.de,
	airlied@...il.com,
	simona@...ll.ch,
	maarten.lankhorst@...ux.intel.com,
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	krzk+dt@...nel.org,
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	angelogioacchino.delregno@...labora.com,
	ck.hu@...iatek.com,
	jitao.shi@...iatek.com,
	jie.qiu@...iatek.com,
	junzhi.zhao@...iatek.com,
	dri-devel@...ts.freedesktop.org,
	linux-mediatek@...ts.infradead.org,
	devicetree@...r.kernel.org,
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Subject: [PATCH v6 10/42] drm/mediatek: Add support for MT8195 Digital Parallel Interface

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@...labora.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,
+	.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