From: Hsiao Chien Sung <[email protected]>
Support "Pre-multiplied" alpha blending mode on in OVL.
Before this patch, only the "coverage" mode is supported.
Signed-off-by: Hsiao Chien Sung <[email protected]>
---
drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 41 +++++++++++++++++++++----
1 file changed, 35 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index e41fd83e36e79..ad84c2fe57111 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -52,13 +52,16 @@
#define GMC_THRESHOLD_HIGH ((1 << GMC_THRESHOLD_BITS) / 4)
#define GMC_THRESHOLD_LOW ((1 << GMC_THRESHOLD_BITS) / 8)
+#define OVL_CON_CLRFMT_MAN BIT(23)
#define OVL_CON_BYTE_SWAP BIT(24)
-#define OVL_CON_MTX_YUV_TO_RGB (6 << 16)
+#define OVL_CON_RGB_SWAP BIT(25)
#define OVL_CON_CLRFMT_RGB (1 << 12)
#define OVL_CON_CLRFMT_RGBA8888 (2 << 12)
#define OVL_CON_CLRFMT_ARGB8888 (3 << 12)
#define OVL_CON_CLRFMT_UYVY (4 << 12)
#define OVL_CON_CLRFMT_YUYV (5 << 12)
+#define OVL_CON_MTX_YUV_TO_RGB (6 << 16)
+#define OVL_CON_CLRFMT_PARGB8888 (OVL_CON_CLRFMT_ARGB8888 | OVL_CON_CLRFMT_MAN)
#define OVL_CON_CLRFMT_RGB565(ovl) ((ovl)->data->fmt_rgb565_is_0 ? \
0 : OVL_CON_CLRFMT_RGB)
#define OVL_CON_CLRFMT_RGB888(ovl) ((ovl)->data->fmt_rgb565_is_0 ? \
@@ -72,6 +75,8 @@
#define OVL_CON_VIRT_FLIP BIT(9)
#define OVL_CON_HORZ_FLIP BIT(10)
+#define OVL_COLOR_ALPHA GENMASK(31, 24)
+
static inline bool is_10bit_rgb(u32 fmt)
{
switch (fmt) {
@@ -296,7 +301,13 @@ void mtk_ovl_config(struct device *dev, unsigned int w,
if (w != 0 && h != 0)
mtk_ddp_write_relaxed(cmdq_pkt, h << 16 | w, &ovl->cmdq_reg, ovl->regs,
DISP_REG_OVL_ROI_SIZE);
- mtk_ddp_write_relaxed(cmdq_pkt, 0x0, &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_ROI_BGCLR);
+
+ /*
+ * The background color must be opaque black (ARGB),
+ * otherwise the alpha blending will have no effect
+ */
+ mtk_ddp_write_relaxed(cmdq_pkt, OVL_COLOR_ALPHA, &ovl->cmdq_reg,
+ ovl->regs, DISP_REG_OVL_ROI_BGCLR);
mtk_ddp_write(cmdq_pkt, 0x1, &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_RST);
mtk_ddp_write(cmdq_pkt, 0x0, &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_RST);
@@ -372,7 +383,8 @@ void mtk_ovl_layer_off(struct device *dev, unsigned int idx,
DISP_REG_OVL_RDMA_CTRL(idx));
}
-static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt)
+static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt,
+ unsigned int blend_mode)
{
/* The return value in switch "MEM_MODE_INPUT_FORMAT_XXX"
* is defined in mediatek HW data sheet.
@@ -391,21 +403,35 @@ static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl, unsigned int fmt)
return OVL_CON_CLRFMT_RGB888(ovl) | OVL_CON_BYTE_SWAP;
case DRM_FORMAT_RGBX8888:
case DRM_FORMAT_RGBA8888:
+ return blend_mode == DRM_MODE_BLEND_COVERAGE ?
+ OVL_CON_CLRFMT_ARGB8888 :
+ OVL_CON_CLRFMT_PARGB8888;
case DRM_FORMAT_RGBX1010102:
case DRM_FORMAT_RGBA1010102:
return OVL_CON_CLRFMT_ARGB8888;
case DRM_FORMAT_BGRX8888:
case DRM_FORMAT_BGRA8888:
+ return OVL_CON_BYTE_SWAP |
+ (blend_mode == DRM_MODE_BLEND_COVERAGE ?
+ OVL_CON_CLRFMT_ARGB8888 :
+ OVL_CON_CLRFMT_PARGB8888);
case DRM_FORMAT_BGRX1010102:
case DRM_FORMAT_BGRA1010102:
return OVL_CON_CLRFMT_ARGB8888 | OVL_CON_BYTE_SWAP;
case DRM_FORMAT_XRGB8888:
case DRM_FORMAT_ARGB8888:
+ return blend_mode == DRM_MODE_BLEND_COVERAGE ?
+ OVL_CON_CLRFMT_RGBA8888 :
+ OVL_CON_CLRFMT_PARGB8888;
case DRM_FORMAT_XRGB2101010:
case DRM_FORMAT_ARGB2101010:
return OVL_CON_CLRFMT_RGBA8888;
case DRM_FORMAT_XBGR8888:
case DRM_FORMAT_ABGR8888:
+ return OVL_CON_RGB_SWAP |
+ (blend_mode == DRM_MODE_BLEND_COVERAGE ?
+ OVL_CON_CLRFMT_RGBA8888 :
+ OVL_CON_CLRFMT_PARGB8888);
case DRM_FORMAT_XBGR2101010:
case DRM_FORMAT_ABGR2101010:
return OVL_CON_CLRFMT_RGBA8888 | OVL_CON_BYTE_SWAP;
@@ -429,6 +455,7 @@ 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;
@@ -447,9 +474,11 @@ void mtk_ovl_layer_config(struct device *dev, unsigned int idx,
return;
}
- con = ovl_fmt_convert(ovl, fmt);
- if (state->base.fb && state->base.fb->format->has_alpha)
- con |= OVL_CON_AEN | OVL_CON_ALPHA;
+ con = ovl_fmt_convert(ovl, fmt, blend_mode);
+ if (state->base.fb) {
+ con |= OVL_CON_AEN;
+ con |= state->base.alpha & OVL_CON_ALPHA;
+ }
if (state->base.fb && !state->base.fb->format->has_alpha)
ignore_pixel_alpha = OVL_CONST_BLEND;
--
2.18.0
Hi, Shawn:
On Thu, 2024-05-02 at 18:38 +0800, Shawn Sung wrote:
> From: Hsiao Chien Sung <[email protected]>
>
> Support "Pre-multiplied" alpha blending mode on in OVL.
> Before this patch, only the "coverage" mode is supported.
>
> Signed-off-by: Hsiao Chien Sung <[email protected]>
> ---
> drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 41 +++++++++++++++++++++
> ----
> 1 file changed, 35 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> index e41fd83e36e79..ad84c2fe57111 100644
> --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
> @@ -52,13 +52,16 @@
> #define GMC_THRESHOLD_HIGH ((1 << GMC_THRESHOLD_BITS) / 4)
> #define GMC_THRESHOLD_LOW ((1 << GMC_THRESHOLD_BITS) / 8)
>
> +#define OVL_CON_CLRFMT_MAN BIT(23)
> #define OVL_CON_BYTE_SWAP BIT(24)
> -#define OVL_CON_MTX_YUV_TO_RGB (6 << 16)
> +#define OVL_CON_RGB_SWAP BIT(25)
> #define OVL_CON_CLRFMT_RGB (1 << 12)
> #define OVL_CON_CLRFMT_RGBA8888 (2 << 12)
> #define OVL_CON_CLRFMT_ARGB8888 (3 << 12)
> #define OVL_CON_CLRFMT_UYVY (4 << 12)
> #define OVL_CON_CLRFMT_YUYV (5 << 12)
> +#define OVL_CON_MTX_YUV_TO_RGB (6 << 16)
> +#define OVL_CON_CLRFMT_PARGB8888 (OVL_CON_CLRFMT_ARGB8888 |
> OVL_CON_CLRFMT_MAN)
> #define OVL_CON_CLRFMT_RGB565(ovl) ((ovl)->data->fmt_rgb565_is_0 ?
> \
> 0 : OVL_CON_CLRFMT_RGB)
> #define OVL_CON_CLRFMT_RGB888(ovl) ((ovl)->data->fmt_rgb565_is_0 ?
> \
> @@ -72,6 +75,8 @@
> #define OVL_CON_VIRT_FLIP BIT(9)
> #define OVL_CON_HORZ_FLIP BIT(10)
>
> +#define OVL_COLOR_ALPHA GENMASK(31, 24)
> +
> static inline bool is_10bit_rgb(u32 fmt)
> {
> switch (fmt) {
> @@ -296,7 +301,13 @@ void mtk_ovl_config(struct device *dev, unsigned
> int w,
> if (w != 0 && h != 0)
> mtk_ddp_write_relaxed(cmdq_pkt, h << 16 | w, &ovl-
> >cmdq_reg, ovl->regs,
> DISP_REG_OVL_ROI_SIZE);
> - mtk_ddp_write_relaxed(cmdq_pkt, 0x0, &ovl->cmdq_reg, ovl->regs,
> DISP_REG_OVL_ROI_BGCLR);
> +
> + /*
> + * The background color must be opaque black (ARGB),
> + * otherwise the alpha blending will have no effect
> + */
> + mtk_ddp_write_relaxed(cmdq_pkt, OVL_COLOR_ALPHA, &ovl-
> >cmdq_reg,
> + ovl->regs, DISP_REG_OVL_ROI_BGCLR);
>
> mtk_ddp_write(cmdq_pkt, 0x1, &ovl->cmdq_reg, ovl->regs,
> DISP_REG_OVL_RST);
> mtk_ddp_write(cmdq_pkt, 0x0, &ovl->cmdq_reg, ovl->regs,
> DISP_REG_OVL_RST);
> @@ -372,7 +383,8 @@ void mtk_ovl_layer_off(struct device *dev,
> unsigned int idx,
> DISP_REG_OVL_RDMA_CTRL(idx));
> }
>
> -static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl,
> unsigned int fmt)
> +static unsigned int ovl_fmt_convert(struct mtk_disp_ovl *ovl,
> unsigned int fmt,
> + unsigned int blend_mode)
> {
> /* The return value in switch "MEM_MODE_INPUT_FORMAT_XXX"
> * is defined in mediatek HW data sheet.
> @@ -391,21 +403,35 @@ static unsigned int ovl_fmt_convert(struct
> mtk_disp_ovl *ovl, unsigned int fmt)
> return OVL_CON_CLRFMT_RGB888(ovl) | OVL_CON_BYTE_SWAP;
> case DRM_FORMAT_RGBX8888:
> case DRM_FORMAT_RGBA8888:
> + return blend_mode == DRM_MODE_BLEND_COVERAGE ?
> + OVL_CON_CLRFMT_ARGB8888 :
> + OVL_CON_CLRFMT_PARGB8888;
> case DRM_FORMAT_RGBX1010102:
> case DRM_FORMAT_RGBA1010102:
> return OVL_CON_CLRFMT_ARGB8888;
> case DRM_FORMAT_BGRX8888:
> case DRM_FORMAT_BGRA8888:
> + return OVL_CON_BYTE_SWAP |
> + (blend_mode == DRM_MODE_BLEND_COVERAGE ?
> + OVL_CON_CLRFMT_ARGB8888 :
> + OVL_CON_CLRFMT_PARGB8888);
> case DRM_FORMAT_BGRX1010102:
> case DRM_FORMAT_BGRA1010102:
> return OVL_CON_CLRFMT_ARGB8888 | OVL_CON_BYTE_SWAP;
> case DRM_FORMAT_XRGB8888:
> case DRM_FORMAT_ARGB8888:
> + return blend_mode == DRM_MODE_BLEND_COVERAGE ?
> + OVL_CON_CLRFMT_RGBA8888 :
> + OVL_CON_CLRFMT_PARGB8888;
> case DRM_FORMAT_XRGB2101010:
> case DRM_FORMAT_ARGB2101010:
> return OVL_CON_CLRFMT_RGBA8888;
> case DRM_FORMAT_XBGR8888:
> case DRM_FORMAT_ABGR8888:
> + return OVL_CON_RGB_SWAP |
> + (blend_mode == DRM_MODE_BLEND_COVERAGE ?
> + OVL_CON_CLRFMT_RGBA8888 :
> + OVL_CON_CLRFMT_PARGB8888);
Originally when coverage mode, XBGR8888 and ABGR8888 return
OVL_CON_CLRFMT_RGBA8888 | OVL_CON_BYTE_SWAP
but this patch return
OVL_CON_CLRFMT_RGBA8888 | OVL_CON_RGB_SWAP
This modification is not related to pre-multiplied blending, so
separate to another patch.
> case DRM_FORMAT_XBGR2101010:
> case DRM_FORMAT_ABGR2101010:
> return OVL_CON_CLRFMT_RGBA8888 | OVL_CON_BYTE_SWAP;
> @@ -429,6 +455,7 @@ 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;
> @@ -447,9 +474,11 @@ void mtk_ovl_layer_config(struct device *dev,
> unsigned int idx,
> return;
> }
>
> - con = ovl_fmt_convert(ovl, fmt);
> - if (state->base.fb && state->base.fb->format->has_alpha)
> - con |= OVL_CON_AEN | OVL_CON_ALPHA;
> + con = ovl_fmt_convert(ovl, fmt, blend_mode);
> + if (state->base.fb) {
> + con |= OVL_CON_AEN;
> + con |= state->base.alpha & OVL_CON_ALPHA;
This looks like plane alpha (The whole video plane use single alpha
value), not related to pre-multiplied blending. So separate to another
patch.
Regards,
CK
> + }
>
> if (state->base.fb && !state->base.fb->format->has_alpha)
> ignore_pixel_alpha = OVL_CONST_BLEND;