<html><body><p> <pre> Hi, Shawn: On Thu, 2024-05-02 at 18:38 +0800, Shawn Sung wrote: > From: Hsiao Chien Sung <shawn.sung@mediatek.com> > > Support "Pre-multiplied" alpha blending mode on in OVL. > Before this patch, only the "coverage" mode is supported. > > Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com> > --- > 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_MANBIT(23) > #define OVL_CON_BYTE_SWAPBIT(24) > -#define OVL_CON_MTX_YUV_TO_RGB(6 << 16) > +#define OVL_CON_RGB_SWAPBIT(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 @@ > #defineOVL_CON_VIRT_FLIPBIT(9) > #defineOVL_CON_HORZ_FLIPBIT(10) > > +#define OVL_COLOR_ALPHAGENMASK(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; </pre> </p></body></html><pre>************* MEDIATEK Confidentiality Notice ******************** The information contained in this e-mail message (including any attachments) may be confidential, proprietary, privileged, or otherwise exempt from disclosure under applicable laws. It is intended to be conveyed only to the designated recipient(s). Any use, dissemination, distribution, printing, retaining or copying of this e-mail (including its attachments) by unintended recipient(s) is strictly prohibited and may be unlawful. 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