OMAPDSS: DISPC: Allow both upscaling and downscaling of chroma (20fbb50b) · Commits · 戴 / test

drivers/video/omap2/dss/dispc.c

+22 −10

Original line number	Diff line number	Diff line
		@@ -1457,6 +1457,7 @@ static void dispc_ovl_set_scaling_uv(enum omap_plane plane,
		{
		int scale_x = out_width != orig_width;
		int scale_y = out_height != orig_height;
		bool chroma_upscale = true;

		if (!dss_has_feature(FEAT_HANDLE_UV_SEPARATE))
		return;
		@@ -1473,23 +1474,34 @@ static void dispc_ovl_set_scaling_uv(enum omap_plane plane,

		switch (color_mode) {
		case OMAP_DSS_COLOR_NV12:
		/* UV is subsampled by 2 vertically*/
		if (chroma_upscale) {
		/* UV is subsampled by 2 horizontally and vertically */
		orig_height >>= 1;
		/* UV is subsampled by 2 horz.*/
		orig_width >>= 1;
		} else {
		/* UV is downsampled by 2 horizontally and vertically */
		orig_height <<= 1;
		orig_width <<= 1;
		}

		break;
		case OMAP_DSS_COLOR_YUV2:
		case OMAP_DSS_COLOR_UYVY:
		/*For YUV422 with 90/270 rotation,
		*we don't upsample chroma
		*/
		/* For YUV422 with 90/270 rotation, we don't upsample chroma */
		if (rotation == OMAP_DSS_ROT_0 \|\|
		rotation == OMAP_DSS_ROT_180)
		/* UV is subsampled by 2 hrz*/
		rotation == OMAP_DSS_ROT_180) {
		if (chroma_upscale)
		/* UV is subsampled by 2 horizontally */
		orig_width >>= 1;
		else
		/* UV is downsampled by 2 horizontally */
		orig_width <<= 1;
		}

		/* must use FIR for YUV422 if rotated */
		if (rotation != OMAP_DSS_ROT_0)
		scale_x = scale_y = true;

		break;
		default:
		BUG();