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drm/atomic: add plane iterator macros 

Add helper macros to iterate the current, or incoming set of planes
attached to a crtc.  These helpers are only available for drivers
converted to use atomic-helpers.

Signed-off-by: Rob Clark <robdclark@gmail.com>
[danvet: Squash in fixup from Rob to move the planemask iterator to
drm_crtc.h and document it. That one is needed by the atomic ioctl so
can't be in a helper library.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Rob Clark 2014-11-25 20:29:46 -05:00 committed by Daniel Vetter
parent 6ddd388ab2
commit dd275956aa
3 changed files with 38 additions and 0 deletions
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1
Documentation/DocBook/drm.tmpl
View File

@ -2343,6 +2343,7 @@ void intel_crt_init(struct drm_device *dev)
<title>Atomic State Reset and Initialization</title>
!Pdrivers/gpu/drm/drm_atomic_helper.c atomic state reset and initialization
</sect3>
!Iinclude/drm/drm_atomic_helper.h
!Edrivers/gpu/drm/drm_atomic_helper.c
</sect2>
<sect2>

24
include/drm/drm_atomic_helper.h
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@ -98,5 +98,29 @@ drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
struct drm_connector_state *state);
/**
* drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
* @plane: the loop cursor
* @crtc: the crtc whose planes are iterated
*
* This iterates over the current state, useful (for example) when applying
* atomic state after it has been checked and swapped. To iterate over the
* planes which *will* be attached (for ->atomic_check()) see
* drm_crtc_for_each_pending_plane()
*/
#define drm_atomic_crtc_for_each_plane(plane, crtc) \
drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
/**
* drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
* @plane: the loop cursor
* @crtc_state: the incoming crtc-state
*
* Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
* attached if the specified state is applied. Useful during (for example)
* ->atomic_check() operations, to validate the incoming state
*/
#define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
#endif /* DRM_ATOMIC_HELPER_H_ */

13
include/drm/drm_crtc.h
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@ -1062,6 +1062,19 @@ struct drm_mode_config {
uint32_t cursor_width, cursor_height;
};
/**
* drm_for_each_plane_mask - iterate over planes specified by bitmask
* @plane: the loop cursor
* @dev: the DRM device
* @plane_mask: bitmask of plane indices
*
* Iterate over all planes specified by bitmask.
*/
#define drm_for_each_plane_mask(plane, dev, plane_mask) \
list_for_each_entry((plane), &(dev)->mode_config.plane_list, head) \
if ((plane_mask) & (1 << drm_plane_index(plane)))
#define obj_to_crtc(x) container_of(x, struct drm_crtc, base)
#define obj_to_connector(x) container_of(x, struct drm_connector, base)
#define obj_to_encoder(x) container_of(x, struct drm_encoder, base)