Commit 1f66fe62 authored by Hsiao Chien Sung's avatar Hsiao Chien Sung Committed by Chun-Kuang Hu
Browse files

drm/mediatek: Support "None" blending in OVL 



Support "None" alpha blending mode on MediaTek's chips.

Reviewed-by: default avatarCK Hu <ck.hu@mediatek.com>
Signed-off-by: default avatarHsiao Chien Sung <shawn.sung@mediatek.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20240717-alpha-blending-v4-1-4b1c806c0749@mediatek.com/


Signed-off-by: default avatarChun-Kuang Hu <chunkuang.hu@kernel.org>
parent 8400291e

drivers/gpu/drm/mediatek/mtk_disp_ovl.c

+3 −1
Original line number Diff line number Diff line
@@ -434,6 +434,7 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx, 
	unsigned int fmt = pending->format;

	unsigned int offset = (pending->y << 16) | pending->x;

	unsigned int src_size = (pending->height << 16) | pending->width;

	unsigned int blend_mode = state->base.pixel_blend_mode;

	unsigned int ignore_pixel_alpha = 0;

	unsigned int con;

	bool is_afbc = pending->modifier != DRM_FORMAT_MOD_LINEAR;
@@ -463,7 +464,8 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx, 
	 * For RGB888 related formats, whether CONST_BLD is enabled or not won't

	 * affect the result. Therefore we use !has_alpha as the condition.

	 */

	if (state->base.fb && !state->base.fb->format->has_alpha)

	if ((state->base.fb && !state->base.fb->format->has_alpha) ||

	    blend_mode == DRM_MODE_BLEND_PIXEL_NONE)

		ignore_pixel_alpha = OVL_CONST_BLEND;



	if (pending->rotation & DRM_MODE_REFLECT_Y) {