Commit eb17c590 authored by Hsiao Chien Sung's avatar Hsiao Chien Sung Committed by Chun-Kuang Hu
Browse files

drm/mediatek: Support "None" blending in Mixer 



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

Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: default avatarHsiao Chien Sung <shawn.sung@mediatek.com>
Reviewed-by: default avatarCK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20240717-alpha-blending-v4-2-4b1c806c0749@mediatek.com/


Signed-off-by: default avatarChun-Kuang Hu <chunkuang.hu@kernel.org>
parent 1f66fe62

drivers/gpu/drm/mediatek/mtk_ethdr.c

+3 −1
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 
 * Copyright (c) 2021 MediaTek Inc.

 */



#include <drm/drm_blend.h>

#include <drm/drm_fourcc.h>

#include <drm/drm_framebuffer.h>

#include <linux/clk.h>
@@ -175,7 +176,8 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned int idx, 
		alpha_con |= state->base.alpha & MIXER_ALPHA;

	}



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

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

	    state->base.pixel_blend_mode == DRM_MODE_BLEND_PIXEL_NONE) {

		/*

		 * Mixer doesn't support CONST_BLD mode,

		 * use a trick to make the output equivalent