From: Thierry Reding <thierry.reding@kernel.org>
To: Thierry Reding <thierry.reding@kernel.org>
Cc: Mikko Perttunen <mperttunen@nvidia.com>,
Jon Hunter <jonathanh@nvidia.com>,
dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org
Subject: [PATCH] drm/tegra: Add blend mode properties
Date: Wed, 26 Aug 2026 12:54:21 +0200 [thread overview]
Message-ID: <20260826105421.1825331-1-thierry.reding@kernel.org> (raw)
From: Thierry Reding <treding@nvidia.com>
The default programming in the driver matches the "coverage" blend mode,
so add the corresponding pixel blend mode property to let userspace know
about it.
Signed-off-by: Thierry Reding <treding@nvidia.com>
---
drivers/gpu/drm/tegra/dc.c | 6 ++++++
drivers/gpu/drm/tegra/hub.c | 2 ++
2 files changed, 8 insertions(+)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
index 0b3fcc7011b35..fefc3761a4bc7 100644
--- a/drivers/gpu/drm/tegra/dc.c
+++ b/drivers/gpu/drm/tegra/dc.c
@@ -904,6 +904,7 @@ static struct drm_plane *tegra_primary_plane_create(struct drm_device *drm,
struct tegra_dc *dc)
{
unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
+ unsigned int blend_caps = BIT(DRM_MODE_BLEND_COVERAGE);
enum drm_plane_type type = DRM_PLANE_TYPE_PRIMARY;
struct tegra_plane *plane;
unsigned int num_formats;
@@ -939,6 +940,7 @@ static struct drm_plane *tegra_primary_plane_create(struct drm_device *drm,
}
drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
+ drm_plane_create_blend_mode_property(&plane->base, blend_caps);
drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
err = drm_plane_create_rotation_property(&plane->base,
@@ -1209,6 +1211,7 @@ static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm,
struct tegra_dc *dc)
{
unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
+ unsigned int blend_caps = BIT(DRM_MODE_BLEND_COVERAGE);
struct tegra_plane *plane;
unsigned int num_formats;
const u32 *formats;
@@ -1252,6 +1255,7 @@ static struct drm_plane *tegra_dc_cursor_plane_create(struct drm_device *drm,
}
drm_plane_helper_add(&plane->base, &tegra_cursor_plane_helper_funcs);
+ drm_plane_create_blend_mode_property(&plane->base, blend_caps);
drm_plane_create_zpos_immutable_property(&plane->base, 255);
return &plane->base;
@@ -1356,6 +1360,7 @@ static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm,
bool cursor)
{
unsigned long possible_crtcs = tegra_plane_get_possible_crtcs(drm);
+ unsigned int blend_caps = BIT(DRM_MODE_BLEND_COVERAGE);
struct tegra_plane *plane;
unsigned int num_formats;
enum drm_plane_type type;
@@ -1394,6 +1399,7 @@ static struct drm_plane *tegra_dc_overlay_plane_create(struct drm_device *drm,
}
drm_plane_helper_add(&plane->base, &tegra_plane_helper_funcs);
+ drm_plane_create_blend_mode_property(&plane->base, blend_caps);
drm_plane_create_zpos_property(&plane->base, plane->index, 0, 255);
err = drm_plane_create_rotation_property(&plane->base,
diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
index bd442bfd45407..448f49f3a7d7e 100644
--- a/drivers/gpu/drm/tegra/hub.c
+++ b/drivers/gpu/drm/tegra/hub.c
@@ -759,6 +759,7 @@ struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
unsigned int index,
enum drm_plane_type type)
{
+ unsigned int blend_caps = BIT(DRM_MODE_BLEND_COVERAGE);
struct tegra_drm *tegra = drm->dev_private;
struct tegra_display_hub *hub = tegra->hub;
struct tegra_shared_plane *plane;
@@ -797,6 +798,7 @@ struct drm_plane *tegra_shared_plane_create(struct drm_device *drm,
}
drm_plane_helper_add(p, &tegra_shared_plane_helper_funcs);
+ drm_plane_create_blend_mode_property(p, blend_caps);
drm_plane_create_zpos_property(p, 0, 0, 255);
return p;
--
2.55.0
next reply other threads:[~2026-08-26 10:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-26 10:54 Thierry Reding [this message]
2026-08-27 9:23 ` [PATCH] drm/tegra: Add blend mode properties Jon Hunter
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