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drm: Add a new helper to validate damage during atomic_check

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This helper function makes sure that damage from plane state is
discarded for full modeset.

Signed-off-by: Deepak Rawat <drawat@vmware.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
This commit is contained in:
Deepak Rawat 2018-08-08 17:36:26 -07:00 committed by Thomas Hellstrom
parent d3b2176782
commit d9778b4026
3 changed files with 40 additions and 0 deletions
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3
drivers/gpu/drm/drm_atomic_helper.c
View File

@ -32,6 +32,7 @@
#include <drm/drm_crtc_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_writeback.h>
#include <drm/drm_damage_helper.h>
#include <linux/dma-fence.h>
#include "drm_crtc_helper_internal.h"
@ -862,6 +863,8 @@ drm_atomic_helper_check_planes(struct drm_device *dev,
drm_atomic_helper_plane_changed(state, old_plane_state, new_plane_state, plane);
drm_atomic_helper_check_plane_damage(state, new_plane_state);
if (!funcs || !funcs->atomic_check)
continue;

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

@ -29,6 +29,7 @@
*
**************************************************************************/
#include <drm/drm_atomic.h>
#include <drm/drm_damage_helper.h>
/**
@ -81,3 +82,37 @@ void drm_plane_enable_fb_damage_clips(struct drm_plane *plane)
0);
}
EXPORT_SYMBOL(drm_plane_enable_fb_damage_clips);
/**
* drm_atomic_helper_check_plane_damage - Verify plane damage on atomic_check.
* @state: The driver state object.
* @plane_state: Plane state for which to verify damage.
*
* This helper function makes sure that damage from plane state is discarded
* for full modeset. If there are more reasons a driver would want to do a full
* plane update rather than processing individual damage regions, then those
* cases should be taken care of here.
*
* Note that &drm_plane_state.fb_damage_clips == NULL in plane state means that
* full plane update should happen. It also ensure helper iterator will return
* &drm_plane_state.src as damage.
*/
void drm_atomic_helper_check_plane_damage(struct drm_atomic_state *state,
struct drm_plane_state *plane_state)
{
struct drm_crtc_state *crtc_state;
if (plane_state->crtc) {
crtc_state = drm_atomic_get_new_crtc_state(state,
plane_state->crtc);
if (WARN_ON(!crtc_state))
return;
if (drm_atomic_crtc_needs_modeset(crtc_state)) {
drm_property_blob_put(plane_state->fb_damage_clips);
plane_state->fb_damage_clips = NULL;
}
}
}
EXPORT_SYMBOL(drm_atomic_helper_check_plane_damage);

2
include/drm/drm_damage_helper.h
View File

@ -35,5 +35,7 @@
#include <drm/drm_atomic_helper.h>
void drm_plane_enable_fb_damage_clips(struct drm_plane *plane);
void drm_atomic_helper_check_plane_damage(struct drm_atomic_state *state,
struct drm_plane_state *plane_state);
#endif