From: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
Support "Pre-multiplied" alpha blending mode in Mixer.
Before this patch, only the coverage mode is supported.
Signed-off-by: Hsiao Chien Sung <shawn.sung@xxxxxxxxxxxx>
---
drivers/gpu/drm/mediatek/mtk_ethdr.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_ethdr.c b/drivers/gpu/drm/mediatek/mtk_ethdr.c
index 5283e0993ed65..4f043be21ee36 100644
--- a/drivers/gpu/drm/mediatek/mtk_ethdr.c
+++ b/drivers/gpu/drm/mediatek/mtk_ethdr.c
@@ -5,6 +5,7 @@
#include <drm/drm_fourcc.h>
#include <drm/drm_framebuffer.h>
+#include <drm/drm_blend.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of.h>
@@ -35,6 +36,7 @@
#define MIX_SRC_L0_EN BIT(0)
#define MIX_L_SRC_CON(n) (0x28 + 0x18 * (n))
#define NON_PREMULTI_SOURCE (2 << 12)
+#define PREMULTI_SOURCE (3 << 12)
#define MIX_L_SRC_SIZE(n) (0x30 + 0x18 * (n))
#define MIX_L_SRC_OFFSET(n) (0x34 + 0x18 * (n))
#define MIX_FUNC_DCM0 0x120
@@ -153,7 +155,7 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned int idx,
struct mtk_plane_pending_state *pending = &state->pending;
unsigned int offset = (pending->x & 1) << 31 | pending->y << 16 | pending->x;
unsigned int align_width = ALIGN_DOWN(pending->width, 2);
- unsigned int alpha_con = 0;
+ unsigned int mix_con = 0;
bool replace_src_a = false;
dev_dbg(dev, "%s+ idx:%d", __func__, idx);
@@ -171,8 +173,12 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned int idx,
return;
}
- if (state->base.fb && state->base.fb->format->has_alpha)
- alpha_con = MIXER_ALPHA_AEN | MIXER_ALPHA;
+ mix_con |= MIXER_ALPHA_AEN | (state->base.alpha & MIXER_ALPHA);
+
+ if (state->base.pixel_blend_mode != DRM_MODE_BLEND_COVERAGE)
+ mix_con |= PREMULTI_SOURCE;
+ else
+ mix_con |= NON_PREMULTI_SOURCE;
if (state->base.fb && !state->base.fb->format->has_alpha) {
/*
@@ -189,8 +195,7 @@ void mtk_ethdr_layer_config(struct device *dev, unsigned int idx,
mtk_ddp_write(cmdq_pkt, pending->height << 16 | align_width, &mixer->cmdq_base,
mixer->regs, MIX_L_SRC_SIZE(idx));
mtk_ddp_write(cmdq_pkt, offset, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_OFFSET(idx));
- mtk_ddp_write_mask(cmdq_pkt, alpha_con, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_CON(idx),
- 0x1ff);
+ mtk_ddp_write(cmdq_pkt, mix_con, &mixer->cmdq_base, mixer->regs, MIX_L_SRC_CON(idx));
mtk_ddp_write_mask(cmdq_pkt, BIT(idx), &mixer->cmdq_base, mixer->regs, MIX_SRC_CON,
BIT(idx));
}
--
2.18.0
