drm/mediatek: mtk_dpi: Add support for additional output formats

Add support for configuring the Display Parallel Interface block
to output YUV444 8/10 bits, YUV422 10/12 bits (8 bits support is
already present), BGR 8-bits, and RGB 10-bits.

The enablement of the various additional output formats in SoCs
platform data will be done in a different change.

Signed-off-by: AngeloGioacchino Del Regno <[email protected]>
Reviewed-by: CK Hu <[email protected]>
Link: https://patchwork.kernel.org/project/dri-devel/patch/[email protected]/
Signed-off-by: Chun-Kuang Hu <[email protected]>

Author: AngeloGioacchino Del Regno

drivers/gpu/drm/mediatek/mtk_dpi.c

@@ -59,7 +59,8 @@ enum mtk_dpi_out_channel_swap {
 
 enum mtk_dpi_out_color_format {
 	MTK_DPI_COLOR_FORMAT_RGB,
-	MTK_DPI_COLOR_FORMAT_YCBCR_422
+	MTK_DPI_COLOR_FORMAT_YCBCR_422,
+	MTK_DPI_COLOR_FORMAT_YCBCR_444
 };
 
 struct mtk_dpi {
@@ -450,9 +451,15 @@ static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
 static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
 					enum mtk_dpi_out_color_format format)
 {
-	mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
+	mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
 
 	switch (format) {
+	case MTK_DPI_COLOR_FORMAT_YCBCR_444:
+		mtk_dpi_config_yuv422_enable(dpi, false);
+		mtk_dpi_config_csc_enable(dpi, true);
+		if (dpi->conf->swap_input_support)
+			mtk_dpi_config_swap_input(dpi, false);
+		break;
 	case MTK_DPI_COLOR_FORMAT_YCBCR_422:
 		mtk_dpi_config_yuv422_enable(dpi, true);
 		mtk_dpi_config_csc_enable(dpi, true);
@@ -743,10 +750,18 @@ static unsigned int mtk_dpi_bus_fmt_bit_num(unsigned int out_bus_format)
 	switch (out_bus_format) {
 	default:
 	case MEDIA_BUS_FMT_RGB888_1X24:
+	case MEDIA_BUS_FMT_BGR888_1X24:
 	case MEDIA_BUS_FMT_RGB888_2X12_LE:
 	case MEDIA_BUS_FMT_RGB888_2X12_BE:
 	case MEDIA_BUS_FMT_YUYV8_1X16:
+	case MEDIA_BUS_FMT_YUV8_1X24:
 		return MTK_DPI_OUT_BIT_NUM_8BITS;
+	case MEDIA_BUS_FMT_RGB101010_1X30:
+	case MEDIA_BUS_FMT_YUYV10_1X20:
+	case MEDIA_BUS_FMT_YUV10_1X30:
+		return MTK_DPI_OUT_BIT_NUM_10BITS;
+	case MEDIA_BUS_FMT_YUYV12_1X24:
+		return MTK_DPI_OUT_BIT_NUM_12BITS;
 	}
 }
 
@@ -757,8 +772,15 @@ static unsigned int mtk_dpi_bus_fmt_channel_swap(unsigned int out_bus_format)
 	case MEDIA_BUS_FMT_RGB888_1X24:
 	case MEDIA_BUS_FMT_RGB888_2X12_LE:
 	case MEDIA_BUS_FMT_RGB888_2X12_BE:
+	case MEDIA_BUS_FMT_RGB101010_1X30:
 	case MEDIA_BUS_FMT_YUYV8_1X16:
+	case MEDIA_BUS_FMT_YUYV10_1X20:
+	case MEDIA_BUS_FMT_YUYV12_1X24:
 		return MTK_DPI_OUT_CHANNEL_SWAP_RGB;
+	case MEDIA_BUS_FMT_BGR888_1X24:
+	case MEDIA_BUS_FMT_YUV8_1X24:
+	case MEDIA_BUS_FMT_YUV10_1X30:
+		return MTK_DPI_OUT_CHANNEL_SWAP_BGR;
 	}
 }
 
@@ -767,11 +789,18 @@ static unsigned int mtk_dpi_bus_fmt_color_format(unsigned int out_bus_format)
 	switch (out_bus_format) {
 	default:
 	case MEDIA_BUS_FMT_RGB888_1X24:
+	case MEDIA_BUS_FMT_BGR888_1X24:
 	case MEDIA_BUS_FMT_RGB888_2X12_LE:
 	case MEDIA_BUS_FMT_RGB888_2X12_BE:
+	case MEDIA_BUS_FMT_RGB101010_1X30:
 		return MTK_DPI_COLOR_FORMAT_RGB;
 	case MEDIA_BUS_FMT_YUYV8_1X16:
+	case MEDIA_BUS_FMT_YUYV10_1X20:
+	case MEDIA_BUS_FMT_YUYV12_1X24:
 		return MTK_DPI_COLOR_FORMAT_YCBCR_422;
+	case MEDIA_BUS_FMT_YUV8_1X24:
+	case MEDIA_BUS_FMT_YUV10_1X30:
+		return MTK_DPI_COLOR_FORMAT_YCBCR_444;
 	}
 }