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drm: Add support for optional per-plane rotation property

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Not all planes on the system may support the same rotations/reflections,
so make it possible to create a separate property for each plane.
This way userspace gets told exactly which rotations/reflections are
possible for each plane.

v2: Add drm_plane_create_rotation_property() helper
v3: Drop the BIT(), __builtin_ffs(x) - 1,
    Moar WARNs for bad parameters
    Deal with superfluous code shuffling

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> (v1)
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1474907460-10717-4-git-send-email-ville.syrjala@linux.intel.com
This commit is contained in:
Ville Syrjälä 2016-09-26 19:30:48 +03:00 committed by Daniel Vetter
parent 6e0c7c3358
commit d138dd3c0c
5 changed files with 49 additions and 3 deletions
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6
drivers/gpu/drm/drm_atomic.c
View File

@ -705,7 +705,8 @@ int drm_atomic_plane_set_property(struct drm_plane *plane,
state->src_w = val;
} else if (property == config->prop_src_h) {
state->src_h = val;
} else if (property == config->rotation_property) {
} else if (property == config->rotation_property ||
property == plane->rotation_property) {
if (!is_power_of_2(val & DRM_ROTATE_MASK))
return -EINVAL;
state->rotation = val;
@ -765,7 +766,8 @@ drm_atomic_plane_get_property(struct drm_plane *plane,
*val = state->src_w;
} else if (property == config->prop_src_h) {
*val = state->src_h;
} else if (property == config->rotation_property) {
} else if (property == config->rotation_property ||
property == plane->rotation_property) {
*val = state->rotation;
} else if (property == plane->zpos_property) {
*val = state->zpos;

35
drivers/gpu/drm/drm_blend.c
View File

@ -162,6 +162,41 @@ struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
}
EXPORT_SYMBOL(drm_mode_create_rotation_property);
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_ROTATE_0) - 1, "rotate-0" },
{ __builtin_ffs(DRM_ROTATE_90) - 1, "rotate-90" },
{ __builtin_ffs(DRM_ROTATE_180) - 1, "rotate-180" },
{ __builtin_ffs(DRM_ROTATE_270) - 1, "rotate-270" },
{ __builtin_ffs(DRM_REFLECT_X) - 1, "reflect-x" },
{ __builtin_ffs(DRM_REFLECT_Y) - 1, "reflect-y" },
};
struct drm_property *prop;
WARN_ON((supported_rotations & DRM_ROTATE_MASK) == 0);
WARN_ON(!is_power_of_2(rotation & DRM_ROTATE_MASK));
WARN_ON(rotation & ~supported_rotations);
prop = drm_property_create_bitmask(plane->dev, 0, "rotation",
props, ARRAY_SIZE(props),
supported_rotations);
if (!prop)
return -ENOMEM;
drm_object_attach_property(&plane->base, prop, rotation);
if (plane->state)
plane->state->rotation = rotation;
plane->rotation_property = prop;
return 0;
}
EXPORT_SYMBOL(drm_plane_create_rotation_property);
/**
* drm_rotation_simplify() - Try to simplify the rotation
* @rotation: Rotation to be simplified

6
drivers/gpu/drm/drm_fb_helper.c
View File

@ -392,7 +392,11 @@ static int restore_fbdev_mode(struct drm_fb_helper *fb_helper)
if (plane->type != DRM_PLANE_TYPE_PRIMARY)
drm_plane_force_disable(plane);
if (dev->mode_config.rotation_property) {
if (plane->rotation_property) {
drm_mode_plane_set_obj_prop(plane,
plane->rotation_property,
DRM_ROTATE_0);
} else if (dev->mode_config.rotation_property) {
drm_mode_plane_set_obj_prop(plane,
dev->mode_config.rotation_property,
DRM_ROTATE_0);

3
include/drm/drm_blend.h
View File

@ -54,6 +54,9 @@ static inline bool drm_rotation_90_or_270(unsigned int rotation)
struct drm_property *drm_mode_create_rotation_property(struct drm_device *dev,
unsigned int supported_rotations);
int drm_plane_create_rotation_property(struct drm_plane *plane,
unsigned int rotation,
unsigned int supported_rotations);
unsigned int drm_rotation_simplify(unsigned int rotation,
unsigned int supported_rotations);

2
include/drm/drm_plane.h
View File

@ -385,6 +385,7 @@ enum drm_plane_type {
* @type: type of plane (overlay, primary, cursor)
* @state: current atomic state for this plane
* @zpos_property: zpos property for this plane
* @rotation_property: rotation property for this plane
* @helper_private: mid-layer private data
*/
struct drm_plane {
@ -431,6 +432,7 @@ struct drm_plane {
struct drm_plane_state *state;
struct drm_property *zpos_property;
struct drm_property *rotation_property;
};
#define obj_to_plane(x) container_of(x, struct drm_plane, base)