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drm: Add a rotation parameter to connectors.

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Some connectors, particularly writeback, can implement flip
or transpose operations as writing back to memory.

Add a connector rotation property to control this.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
This commit is contained in:
Dave Stevenson
2024-10-22 17:22:40 +01:00
committed by Phil Elwell
parent b3b3d12cf0
commit 8fec3ff870
4 changed files with 60 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/gpu/drm/drm_atomic_uapi.c
View File

@@ -811,6 +811,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector,
state->max_requested_bpc = val;
} else if (property == connector->privacy_screen_sw_state_property) {
state->privacy_screen_sw_state = val;
} else if (property == connector->rotation_property) {
state->rotation = val;
} else if (connector->funcs->atomic_set_property) {
return connector->funcs->atomic_set_property(connector,
state, property, val);
@@ -900,6 +902,8 @@ drm_atomic_connector_get_property(struct drm_connector *connector,
*val = state->max_requested_bpc;
} else if (property == connector->privacy_screen_sw_state_property) {
*val = state->privacy_screen_sw_state;
} else if (property == connector->rotation_property) {
*val = state->rotation;
} else if (connector->funcs->atomic_get_property) {
return connector->funcs->atomic_get_property(connector,
state, property, val);

50
drivers/gpu/drm/drm_blend.c
View File

@@ -235,6 +235,16 @@ int drm_plane_create_alpha_property(struct drm_plane *plane)
}
EXPORT_SYMBOL(drm_plane_create_alpha_property);
static const struct drm_prop_enum_list drm_rotate_props[] = {
{ __builtin_ffs(DRM_MODE_ROTATE_0) - 1, "rotate-0" },
{ __builtin_ffs(DRM_MODE_ROTATE_90) - 1, "rotate-90" },
{ __builtin_ffs(DRM_MODE_ROTATE_180) - 1, "rotate-180" },
{ __builtin_ffs(DRM_MODE_ROTATE_270) - 1, "rotate-270" },
{ __builtin_ffs(DRM_MODE_REFLECT_X) - 1, "reflect-x" },
{ __builtin_ffs(DRM_MODE_REFLECT_Y) - 1, "reflect-y" },
{ __builtin_ffs(DRM_MODE_TRANSPOSE) - 1, "transpose" },
};
/**
* drm_plane_create_rotation_property - create a new rotation property
* @plane: drm plane
@@ -275,15 +285,6 @@ int drm_plane_create_rotation_property(struct drm_plane *plane,
unsigned int rotation,
unsigned int supported_rotations)
{
static const struct drm_prop_enum_list props[] = {
{ __builtin_ffs(DRM_MODE_ROTATE_0) - 1, "rotate-0" },
{ __builtin_ffs(DRM_MODE_ROTATE_90) - 1, "rotate-90" },
{ __builtin_ffs(DRM_MODE_ROTATE_180) - 1, "rotate-180" },
{ __builtin_ffs(DRM_MODE_ROTATE_270) - 1, "rotate-270" },
{ __builtin_ffs(DRM_MODE_REFLECT_X) - 1, "reflect-x" },
{ __builtin_ffs(DRM_MODE_REFLECT_Y) - 1, "reflect-y" },
{ __builtin_ffs(DRM_MODE_TRANSPOSE) - 1, "transpose" },
};
struct drm_property *prop;
WARN_ON((supported_rotations & DRM_MODE_ROTATE_MASK) == 0);
@@ -291,7 +292,8 @@ int drm_plane_create_rotation_property(struct drm_plane *plane,
WARN_ON(rotation & ~supported_rotations);
prop = drm_property_create_bitmask(plane->dev, 0, "rotation",
props, ARRAY_SIZE(props),
drm_rotate_props,
ARRAY_SIZE(drm_rotate_props),
supported_rotations);
if (!prop)
return -ENOMEM;
@@ -307,6 +309,34 @@ int drm_plane_create_rotation_property(struct drm_plane *plane,
}
EXPORT_SYMBOL(drm_plane_create_rotation_property);
int drm_connector_create_rotation_property(struct drm_connector *conn,
unsigned int rotation,
unsigned int supported_rotations)
{
struct drm_property *prop;
WARN_ON((supported_rotations & DRM_MODE_ROTATE_MASK) == 0);
WARN_ON(!is_power_of_2(rotation & DRM_MODE_ROTATE_MASK));
WARN_ON(rotation & ~supported_rotations);
prop = drm_property_create_bitmask(conn->dev, 0, "rotation",
drm_rotate_props,
ARRAY_SIZE(drm_rotate_props),
supported_rotations);
if (!prop)
return -ENOMEM;
drm_object_attach_property(&conn->base, prop, rotation);
if (conn->state)
conn->state->rotation = rotation;
conn->rotation_property = prop;
return 0;
}
EXPORT_SYMBOL(drm_connector_create_rotation_property);
/**
* drm_rotation_simplify() - Try to simplify the rotation
* @rotation: Rotation to be simplified

5
include/drm/drm_blend.h
View File

@@ -34,6 +34,7 @@
struct drm_device;
struct drm_atomic_state;
struct drm_plane;
struct drm_connector;
static inline bool drm_rotation_90_or_270(unsigned int rotation)
{
@@ -58,4 +59,8 @@ int drm_atomic_normalize_zpos(struct drm_device *dev,
struct drm_atomic_state *state);
int drm_plane_create_blend_mode_property(struct drm_plane *plane,
unsigned int supported_modes);
int drm_connector_create_rotation_property(struct drm_connector *conn,
unsigned int rotation,
unsigned int supported_rotations);
#endif

11
include/drm/drm_connector.h
View File

@@ -1029,6 +1029,11 @@ struct drm_connector_state {
* DRM blob property for HDR output metadata
*/
struct drm_property_blob *hdr_output_metadata;
/**
* @rotation: Connector property to rotate the maximum output image.
*/
u32 rotation;
};
/**
@@ -1696,6 +1701,12 @@ struct drm_connector {
*/
struct drm_property *privacy_screen_hw_state_property;
/**
* @rotation_property: Optional DRM property controlling rotation of the
* output.
*/
struct drm_property *rotation_property;
#define DRM_CONNECTOR_POLL_HPD (1 << 0)
#define DRM_CONNECTOR_POLL_CONNECT (1 << 1)
#define DRM_CONNECTOR_POLL_DISCONNECT (1 << 2)