Messages in this thread | | | Date | Thu, 15 Feb 2024 12:02:22 +0100 | Subject | Re: [PATCH v5 08/13] drm/mediatek: Support alpha blending in OVL | From | AngeloGioacchino Del Regno <> |
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Il 15/02/24 11:11, Hsiao Chien Sung ha scritto: > Support "Pre-multiplied" and "None" blend mode on MediaTek's chips. > Before this patch, only the "Coverage" mode is supported. > > Please refer to the description of the commit > "drm/mediatek: Support alpha blending in display driver" > for more information. > > Signed-off-by: Hsiao Chien Sung <shawn.sung@mediatek.com> > --- > drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 83 +++++++++++++++++++++---- > 1 file changed, 72 insertions(+), 11 deletions(-) > > diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c > index c42fce38a35eb..98c989fddcc08 100644 > --- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c > +++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c > @@ -39,6 +39,7 @@ > #define DISP_REG_OVL_PITCH_MSB(n) (0x0040 + 0x20 * (n)) > #define OVL_PITCH_MSB_2ND_SUBBUF BIT(16) > #define DISP_REG_OVL_PITCH(n) (0x0044 + 0x20 * (n)) > +#define OVL_CONST_BLEND BIT(28) > #define DISP_REG_OVL_RDMA_CTRL(n) (0x00c0 + 0x20 * (n)) > #define DISP_REG_OVL_RDMA_GMC(n) (0x00c8 + 0x20 * (n)) > #define DISP_REG_OVL_ADDR_MT2701 0x0040 > @@ -52,13 +53,16 @@ > #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 +76,22 @@ > #define OVL_CON_VIRT_FLIP BIT(9) > #define OVL_CON_HORZ_FLIP BIT(10) > > +static inline bool is_10bit_rgb(u32 fmt) > +{ > + switch (fmt) { > + case DRM_FORMAT_XRGB2101010: > + case DRM_FORMAT_ARGB2101010: > + case DRM_FORMAT_RGBX1010102: > + case DRM_FORMAT_RGBA1010102: > + case DRM_FORMAT_XBGR2101010: > + case DRM_FORMAT_ABGR2101010: > + case DRM_FORMAT_BGRX1010102: > + case DRM_FORMAT_BGRA1010102: > + return true; > + } > + return false; > +} > + > static const u32 mt8173_formats[] = { > DRM_FORMAT_XRGB8888, > DRM_FORMAT_ARGB8888, > @@ -89,12 +109,20 @@ static const u32 mt8173_formats[] = { > static const u32 mt8195_formats[] = { > DRM_FORMAT_XRGB8888, > DRM_FORMAT_ARGB8888, > + DRM_FORMAT_XRGB2101010, > DRM_FORMAT_ARGB2101010, > DRM_FORMAT_BGRX8888, > DRM_FORMAT_BGRA8888, > + DRM_FORMAT_BGRX1010102, > DRM_FORMAT_BGRA1010102, > DRM_FORMAT_ABGR8888, > DRM_FORMAT_XBGR8888, > + DRM_FORMAT_XBGR2101010, > + DRM_FORMAT_ABGR2101010, > + DRM_FORMAT_RGBX8888, > + DRM_FORMAT_RGBA8888, > + DRM_FORMAT_RGBX1010102, > + DRM_FORMAT_RGBA1010102, > DRM_FORMAT_RGB888, > DRM_FORMAT_BGR888, > DRM_FORMAT_RGB565, > @@ -254,9 +282,7 @@ static void mtk_ovl_set_bit_depth(struct device *dev, int idx, u32 format, > reg = readl(ovl->regs + DISP_REG_OVL_CLRFMT_EXT); > reg &= ~OVL_CON_CLRFMT_BIT_DEPTH_MASK(idx); > > - if (format == DRM_FORMAT_RGBA1010102 || > - format == DRM_FORMAT_BGRA1010102 || > - format == DRM_FORMAT_ARGB2101010) > + if (is_10bit_rgb(format)) > bit_depth = OVL_CON_CLRFMT_10_BIT; > > reg |= OVL_CON_CLRFMT_BIT_DEPTH(bit_depth, idx); > @@ -274,7 +300,13 @@ 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 should be opaque black (ARGB), > + * otherwise there will be no effect with alpha blend > + */ > + mtk_ddp_write_relaxed(cmdq_pkt, 0xff000000, &ovl->cmdq_reg, > + ovl->regs, DISP_REG_OVL_ROI_BGCLR);
Multiple (all of?) OVL color registers, like{L0-3,EL0-2}_YUV1BIT_COLOR(x), ROI_BGCLR, L{0-3}_CLR and others do follow this exact layout:
#define OVL_COLOR_ALPHA GENMASK(31, 24) #define OVL_COLOR_GREEN GENMASK(23, 16) #define OVL_COLOR_RED GENMASK(15, 8) #define OVL_COLOR_BLUE GENMASK(7, 0)
..so we can define those as they're valid for multiple registers, and then we can use the definition instead of an apparently random value.
/* * The background color should be opaque black (ARGB), * otherwise there will be no effect with alpha blend */ mtk_ddp_write_relaxed(cmdq_pkt, OVL_COLOR_ALPHA, &ovl->cmdq_reg, ovl->regs, DISP_REG_OVL_ROI_BGCLR);
Everything else looks ok.
Regards, Angelo
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