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drm: add support for private planes

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In cases where the scanout hw is sufficiently similar between "overlay"
and traditional crtc layers, it might be convenient to allow the driver
to create internal drm_plane helper objects used by the drm_crtc
implementation, rather than duplicate code between the plane and crtc.
A private plane is not exposed to userspace.

Signed-off-by: Rob Clark <rob@ti.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Rob Clark 2011-12-13 20:19:36 -06:00 committed by Dave Airlie
parent a9971157b6
commit 0a7eb243db
4 changed files with 21 additions and 8 deletions
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22
drivers/gpu/drm/drm_crtc.c
View File

@ -557,7 +557,8 @@ EXPORT_SYMBOL(drm_encoder_cleanup);
int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
unsigned long possible_crtcs,
const struct drm_plane_funcs *funcs,
const uint32_t *formats, uint32_t format_count)
const uint32_t *formats, uint32_t format_count,
bool priv)
{
mutex_lock(&dev->mode_config.mutex);
@ -577,8 +578,16 @@ int drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
plane->format_count = format_count;
plane->possible_crtcs = possible_crtcs;
list_add_tail(&plane->head, &dev->mode_config.plane_list);
dev->mode_config.num_plane++;
/* private planes are not exposed to userspace, but depending on
* display hardware, might be convenient to allow sharing programming
* for the scanout engine with the crtc implementation.
*/
if (!priv) {
list_add_tail(&plane->head, &dev->mode_config.plane_list);
dev->mode_config.num_plane++;
} else {
INIT_LIST_HEAD(&plane->head);
}
mutex_unlock(&dev->mode_config.mutex);
@ -593,8 +602,11 @@ void drm_plane_cleanup(struct drm_plane *plane)
mutex_lock(&dev->mode_config.mutex);
kfree(plane->format_types);
drm_mode_object_put(dev, &plane->base);
list_del(&plane->head);
dev->mode_config.num_plane--;
/* if not added to a list, it must be a private plane */
if (!list_empty(&plane->head)) {
list_del(&plane->head);
dev->mode_config.num_plane--;
}
mutex_unlock(&dev->mode_config.mutex);
}
EXPORT_SYMBOL(drm_plane_cleanup);

2
drivers/gpu/drm/exynos/exynos_drm_plane.c
View File

@ -117,7 +117,7 @@ int exynos_plane_init(struct drm_device *dev, unsigned int nr)
/* TODO: format */
return drm_plane_init(dev, &exynos_plane->base, possible_crtcs,
&exynos_plane_funcs, NULL, 0);
&exynos_plane_funcs, NULL, 0, false);
}
int exynos_plane_set_zpos_ioctl(struct drm_device *dev, void *data,

2
drivers/gpu/drm/i915/intel_sprite.c
View File

@ -659,7 +659,7 @@ intel_plane_init(struct drm_device *dev, enum pipe pipe)
possible_crtcs = (1 << pipe);
ret = drm_plane_init(dev, &intel_plane->base, possible_crtcs,
&intel_plane_funcs, snb_plane_formats,
ARRAY_SIZE(snb_plane_formats));
ARRAY_SIZE(snb_plane_formats), false);
if (ret)
kfree(intel_plane);

3
include/drm/drm_crtc.h
View File

@ -829,7 +829,8 @@ extern int drm_plane_init(struct drm_device *dev,
struct drm_plane *plane,
unsigned long possible_crtcs,
const struct drm_plane_funcs *funcs,
const uint32_t *formats, uint32_t format_count);
const uint32_t *formats, uint32_t format_count,
bool priv);
extern void drm_plane_cleanup(struct drm_plane *plane);
extern void drm_encoder_cleanup(struct drm_encoder *encoder);