On Mon, 2022-05-30 at 16:38 +0800, CK Hu wrote:

Hi, Guillaume:

On Mon, 2022-05-23 at 12:47 +0200, Guillaume Ranquet wrote:

quoted

Add flexibility by moving the swap shift value to SoC specific
config

Signed-off-by: Guillaume Ranquet <redacted>
Reviewed-by: Rex-BC Chen <redacted>
Reviewed-by: AngeloGioacchino Del Regno <
angelogioacchino.delregno@collabora.com>
---
 drivers/gpu/drm/mediatek/mtk_dpi.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c

b/drivers/gpu/drm/mediatek/mtk_dpi.c
index 6eeda222a973..6d4d8c6ec47d 100644

--- a/drivers/gpu/drm/mediatek/mtk_dpi.c
+++ b/drivers/gpu/drm/mediatek/mtk_dpi.c

@@ -131,6 +131,7 @@ struct mtk_dpi_conf {
 	u32 dimension_mask;
 	/* HSIZE and VSIZE mask (no shift) */
 	u32 hvsize_mask;
+	u32 channel_swap_shift;
 	const struct mtk_dpi_yc_limit *limit;
 };
 

@@ -349,7 +350,8 @@ 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 << dpi->conf-

quoted

channel_swap_shift,

+		     CH_SWAP_MASK);
From the definiton:

 #define CH_SWAP				0
+#define DPINTF_CH_SWAP			BIT(1)
 #define CH_SWAP_MASK			(0x7 << 0)
+#define DPINTF_CH_SWAP_MASK		(0x7 << 1)

This statement should be:

mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << dpi->conf-

quoted

channel_swap_shift, CH_SWAP_MASK << dpi->conf->channel_swap_shift);

dpi->conf->channel_swap_shift is 1 for MT8195-DP_INTF and 0 for
others.
And drop the definition of DPINTF_CH_SWAP and DPINTF_CH_SWAP_MASK,

Regards,
CK

Hello CK,

I think we should keep DPINTF_CH_SWAP?
BIT(1) = 2 so the shift should be:
dpi->conf->channel_swap_shift is 2 for MT8195-DP_INTF and 0 for
others.

BRs,
Bo-Chen

quoted

 }
 
 static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool
enable)

@@ -821,6 +823,7 @@ static const struct mtk_dpi_conf mt8173_conf =

{
 	.swap_input_support = true,
 	.dimension_mask = HPW_MASK,
 	.hvsize_mask = HSIZE_MASK,
+	.channel_swap_shift = CH_SWAP,
 	.limit = &mtk_dpi_limit,
 };
 

@@ -835,6 +838,7 @@ static const struct mtk_dpi_conf mt2701_conf =

{
 	.swap_input_support = true,
 	.dimension_mask = HPW_MASK,
 	.hvsize_mask = HSIZE_MASK,
+	.channel_swap_shift = CH_SWAP,
 	.limit = &mtk_dpi_limit,
 };
 

@@ -848,6 +852,7 @@ static const struct mtk_dpi_conf mt8183_conf =

{
 	.swap_input_support = true,
 	.dimension_mask = HPW_MASK,
 	.hvsize_mask = HSIZE_MASK,
+	.channel_swap_shift = CH_SWAP,
 	.limit = &mtk_dpi_limit,
 };
 

@@ -861,6 +866,7 @@ static const struct mtk_dpi_conf mt8192_conf =

{
 	.swap_input_support = true,
 	.dimension_mask = HPW_MASK,
 	.hvsize_mask = HSIZE_MASK,
+	.channel_swap_shift = CH_SWAP,
 	.limit = &mtk_dpi_limit,
 };
 

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