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drm/simple-kms: Use drm_atomic_helper_check_crtc_state() 

Simple-KMS helpers guarantee that the CRTC and plane enable
flags are synchronized. Implement this with atomic helpers
drm_atomic_helper_check_crtc_state() on the CRTC side, and
drm_atomic_helper_check_plane_state() on the plane side.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Jocelyn Falempe <jfalempe@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220617103226.25617-3-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2022-06-17 12:32:25 +02:00
parent d6b9af1097
commit dc2cdd17d1
1 changed files with 6 additions and 8 deletions
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14
drivers/gpu/drm/drm_simple_kms_helper.c
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@ -100,14 +100,12 @@ drm_simple_kms_crtc_mode_valid(struct drm_crtc *crtc,
static int drm_simple_kms_crtc_check(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
crtc);
bool has_primary = crtc_state->plane_mask &
drm_plane_mask(crtc->primary);
struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
int ret;
/* We always want to have an active plane with an active CRTC */
if (has_primary != crtc_state->enable)
return -EINVAL;
ret = drm_atomic_helper_check_crtc_state(crtc_state, false);
if (ret)
return ret;
return drm_atomic_add_affected_planes(state, crtc);
}
@ -227,7 +225,7 @@ static int drm_simple_kms_plane_atomic_check(struct drm_plane *plane,
ret = drm_atomic_helper_check_plane_state(plane_state, crtc_state,
DRM_PLANE_HELPER_NO_SCALING,
DRM_PLANE_HELPER_NO_SCALING,
false, true);
false, false);
if (ret)
return ret;