[PATCH 05/15] drm/mediatek: Support alpha blending in display driver
From: Hsiao Chien Sung <hidden>
Date: 2023-08-23 15:14:06
Also in:
linux-mediatek, lkml
Subsystem:
drm drivers, drm drivers for mediatek, the rest · Maintainers:
David Airlie, Simona Vetter, Chun-Kuang Hu, Philipp Zabel, Linus Torvalds
Support alpha blending by adding correct blend mode and alpha property in plane initialization. Signed-off-by: Hsiao Chien Sung <redacted> --- drivers/gpu/drm/mediatek/mtk_drm_plane.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_plane.c b/drivers/gpu/drm/mediatek/mtk_drm_plane.c
index 31f9420aff6f..ca22d02375d5 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_plane.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_plane.c@@ -305,6 +305,9 @@ int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane, size_t num_formats) { int err; + u32 blend_mode = BIT(DRM_MODE_BLEND_PIXEL_NONE) | + BIT(DRM_MODE_BLEND_PREMULTI) | + BIT(DRM_MODE_BLEND_COVERAGE); if (!formats || !num_formats) { DRM_ERROR("no formats for plane\n");
@@ -327,6 +330,14 @@ int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane, DRM_INFO("Create rotation property failed\n"); } + err = drm_plane_create_alpha_property(plane); + if (err) + DRM_ERROR("failed to create property: alpha\n"); + + err = drm_plane_create_blend_mode_property(plane, blend_mode); + if (err) + DRM_ERROR("failed to create property: blend_mode\n"); + drm_plane_helper_add(plane, &mtk_plane_helper_funcs); return 0;
--
2.18.0
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