The mixer hardware supports both premultiplied alpha and non-premultiplied alpha. Currently premultiplied alpha is default, make this configurable.
Tested on Odroid-U3 with Exynos 4412 CPU, kernel next-20180913 using modetest. Signed-off-by: Christoph Manszewski <[email protected]> --- drivers/gpu/drm/exynos/exynos_drm_drv.h | 1 + drivers/gpu/drm/exynos/exynos_drm_plane.c | 7 +++++++ drivers/gpu/drm/exynos/exynos_mixer.c | 27 +++++++++++++++++++++------ 3 files changed, 29 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h index c737c4bd2c19..1cb26d8c66f9 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h @@ -92,6 +92,7 @@ struct exynos_drm_plane { #define EXYNOS_DRM_PLANE_CAP_SCALE (1 << 1) #define EXYNOS_DRM_PLANE_CAP_ZPOS (1 << 2) #define EXYNOS_DRM_PLANE_CAP_TILE (1 << 3) +#define EXYNOS_DRM_PLANE_CAP_PIX_BLEND (1 << 4) /* * Exynos DRM plane configuration structure. diff --git a/drivers/gpu/drm/exynos/exynos_drm_plane.c b/drivers/gpu/drm/exynos/exynos_drm_plane.c index 755ca0e9ead2..236408906f1f 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_plane.c +++ b/drivers/gpu/drm/exynos/exynos_drm_plane.c @@ -298,6 +298,10 @@ int exynos_plane_init(struct drm_device *dev, const struct exynos_drm_plane_config *config) { int err; + unsigned int supported_modes = BIT(DRM_MODE_BLEND_PIXEL_NONE) | + BIT(DRM_MODE_BLEND_PREMULTI) | + BIT(DRM_MODE_BLEND_COVERAGE); + struct drm_plane *plane = &exynos_plane->base; err = drm_universal_plane_init(dev, &exynos_plane->base, 1 << dev->mode_config.num_crtc, @@ -318,5 +322,8 @@ int exynos_plane_init(struct drm_device *dev, exynos_plane_attach_zpos_property(&exynos_plane->base, config->zpos, !(config->capabilities & EXYNOS_DRM_PLANE_CAP_ZPOS)); + if (config->capabilities & EXYNOS_DRM_PLANE_CAP_PIX_BLEND) + drm_plane_create_blend_mode_property(plane, supported_modes); + return 0; } diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c index ffbf4a950f69..721b63e92b28 100644 --- a/drivers/gpu/drm/exynos/exynos_mixer.c +++ b/drivers/gpu/drm/exynos/exynos_mixer.c @@ -131,14 +131,16 @@ static const struct exynos_drm_plane_config plane_configs[MIXER_WIN_NR] = { .pixel_formats = mixer_formats, .num_pixel_formats = ARRAY_SIZE(mixer_formats), .capabilities = EXYNOS_DRM_PLANE_CAP_DOUBLE | - EXYNOS_DRM_PLANE_CAP_ZPOS, + EXYNOS_DRM_PLANE_CAP_ZPOS | + EXYNOS_DRM_PLANE_CAP_PIX_BLEND, }, { .zpos = 1, .type = DRM_PLANE_TYPE_CURSOR, .pixel_formats = mixer_formats, .num_pixel_formats = ARRAY_SIZE(mixer_formats), .capabilities = EXYNOS_DRM_PLANE_CAP_DOUBLE | - EXYNOS_DRM_PLANE_CAP_ZPOS, + EXYNOS_DRM_PLANE_CAP_ZPOS | + EXYNOS_DRM_PLANE_CAP_PIX_BLEND, }, { .zpos = 2, .type = DRM_PLANE_TYPE_OVERLAY, @@ -309,15 +311,22 @@ static void vp_default_filter(struct mixer_context *ctx) } static void mixer_cfg_gfx_blend(struct mixer_context *ctx, unsigned int win, - bool alpha) + unsigned int pixel_alpha) { u32 val; val = MXR_GRP_CFG_COLOR_KEY_DISABLE; /* no blank key */ - if (alpha) { - /* blending based on pixel alpha */ + switch (pixel_alpha) { + case DRM_MODE_BLEND_PIXEL_NONE: + break; + case DRM_MODE_BLEND_COVERAGE: + val |= MXR_GRP_CFG_PIXEL_BLEND_EN; + break; + case DRM_MODE_BLEND_PREMULTI: + default: val |= MXR_GRP_CFG_BLEND_PRE_MUL; val |= MXR_GRP_CFG_PIXEL_BLEND_EN; + break; } mixer_reg_writemask(ctx, MXR_GRAPHIC_CFG(win), val, MXR_GRP_CFG_MISC_MASK); @@ -553,10 +562,16 @@ static void mixer_graph_buffer(struct mixer_context *ctx, unsigned int win = plane->index; unsigned int x_ratio = 0, y_ratio = 0; unsigned int dst_x_offset, dst_y_offset; + unsigned int pixel_alpha; dma_addr_t dma_addr; unsigned int fmt; u32 val; + if (fb->format->has_alpha) + pixel_alpha = state->base.pixel_blend_mode; + else + pixel_alpha = DRM_MODE_BLEND_PIXEL_NONE; + switch (fb->format->format) { case DRM_FORMAT_XRGB4444: case DRM_FORMAT_ARGB4444: @@ -616,7 +631,7 @@ static void mixer_graph_buffer(struct mixer_context *ctx, mixer_reg_write(ctx, MXR_GRAPHIC_BASE(win), dma_addr); mixer_cfg_layer(ctx, win, priority, true); - mixer_cfg_gfx_blend(ctx, win, fb->format->has_alpha); + mixer_cfg_gfx_blend(ctx, win, pixel_alpha); /* layer update mandatory for mixer 16.0.33.0 */ if (ctx->mxr_ver == MXR_VER_16_0_33_0 || -- 2.7.4 _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
