Commit 4393c74a authored by Bo-Chen Chen's avatar Bo-Chen Chen Committed by Chun-Kuang Hu
Browse files

drm/mediatek: dpi: Add support for quantization range 



For RGB colorimetry, CTA-861 support both limited and full range data
when receiving video with RGB color space.
We use drm_default_rgb_quant_range() to determine the correct setting.

Signed-off-by: default avatarBo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/linux-mediatek/patch/20220701035845.16458-6-rex-bc.chen@mediatek.com/


Signed-off-by: default avatarChun-Kuang Hu <chunkuang.hu@kernel.org>
parent aed61ef6

drivers/gpu/drm/mediatek/mtk_dpi.c

+21 −13
Original line number Diff line number Diff line
@@ -238,16 +238,30 @@ static void mtk_dpi_config_fb_size(struct mtk_dpi *dpi, u32 width, u32 height) 
	mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE, VSIZE_MASK);

}



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)

{

	mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_bottom << Y_LIMINT_BOT,

	struct mtk_dpi_yc_limit limit;



	if (drm_default_rgb_quant_range(&dpi->mode) ==

	    HDMI_QUANTIZATION_RANGE_LIMITED) {

		limit.y_bottom = 0x10;

		limit.y_top = 0xfe0;

		limit.c_bottom = 0x10;

		limit.c_top = 0xfe0;

	} else {

		limit.y_bottom = 0;

		limit.y_top = 0xfff;

		limit.c_bottom = 0;

		limit.c_top = 0xfff;

	}



	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,

	mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit.y_top << Y_LIMINT_TOP,

		     Y_LIMINT_TOP_MASK);

	mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_bottom << C_LIMIT_BOT,

	mtk_dpi_mask(dpi, DPI_C_LIMIT, limit.c_bottom << C_LIMIT_BOT,

		     C_LIMIT_BOT_MASK);

	mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_top << C_LIMIT_TOP,

	mtk_dpi_mask(dpi, DPI_C_LIMIT, limit.c_top << C_LIMIT_TOP,

		     C_LIMIT_TOP_MASK);

}
@@ -438,7 +452,6 @@ 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 };
@@ -473,11 +486,6 @@ static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi, 
	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 ?
@@ -525,7 +533,7 @@ 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);