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drm: Add drm_mode_config->normalize_zpos boolean 

Instead of drivers duplicating the drm_atomic_helper_check() code to be
able to normalize the zpos they can use the normalize_zpos flag to let the
drm core to do it.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180321102029.15248-2-peter.ujfalusi@ti.com
This commit is contained in:
Peter Ujfalusi 2018-03-21 12:20:24 +02:00 committed by Tomi Valkeinen
parent f4392860b4
commit 49efffc7fb
3 changed files with 21 additions and 2 deletions
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11
drivers/gpu/drm/drm_atomic_helper.c
View File

@ -875,6 +875,11 @@ EXPORT_SYMBOL(drm_atomic_helper_check_planes);
* functions depend upon an updated adjusted_mode.clock to e.g. properly compute
* watermarks.
*
* Note that zpos normalization will add all enable planes to the state which
* might not desired for some drivers.
* For example enable/disable of a cursor plane which have fixed zpos value
* would trigger all other enabled planes to be forced to the state change.
*
* RETURNS:
* Zero for success or -errno
*/
@ -887,6 +892,12 @@ int drm_atomic_helper_check(struct drm_device *dev,
if (ret)
return ret;
if (dev->mode_config.normalize_zpos) {
ret = drm_atomic_normalize_zpos(dev, state);
if (ret)
return ret;
}
ret = drm_atomic_helper_check_planes(dev, state);
if (ret)
return ret;

8
include/drm/drm_mode_config.h
View File

@ -795,6 +795,14 @@ struct drm_mode_config {
*/
bool allow_fb_modifiers;
/**
* @normalize_zpos:
*
* If true the drm core will call drm_atomic_normalize_zpos() as part of
* atomic mode checking from drm_atomic_helper_check()
*/
bool normalize_zpos;
/**
* @modifiers_property: Plane property to list support modifier/format
* combination.

4
include/drm/drm_plane.h
View File

@ -51,8 +51,8 @@ struct drm_modeset_acquire_ctx;
* plane with a lower ID.
* @normalized_zpos: normalized value of zpos: unique, range from 0 to N-1
* where N is the number of active planes for given crtc. Note that
* the driver must call drm_atomic_normalize_zpos() to update this before
* it can be trusted.
* the driver must set drm_mode_config.normalize_zpos or call
* drm_atomic_normalize_zpos() to update this before it can be trusted.
* @src: clipped source coordinates of the plane (in 16.16)
* @dst: clipped destination coordinates of the plane
* @state: backpointer to global drm_atomic_state