On Wed, Apr 3, 2024 at 2:28 AM Zack Rusin zack.rusin@broadcom.com wrote:
The conditional was supposed to prevent enabling of a crtc state without a set primary plane. Accidently it also prevented disabling crtc state with a set primary plane. Neither is correct.
Fix the conditional and just driver-warn when a crtc state has been enabled without a primary plane which will help debug broken userspace.
Fixes IGT's kms_atomic_interruptible and kms_atomic_transition tests.
Signed-off-by: Zack Rusin zack.rusin@broadcom.com Fixes: 06ec41909e31 ("drm/vmwgfx: Add and connect CRTC helper functions") Cc: Broadcom internal kernel review list bcm-kernel-feedback-list@broadcom.com Cc: dri-devel@lists.freedesktop.org Cc: stable@vger.kernel.org # v4.12+
drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index e33e5993d8fc..13b2820cae51 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -931,6 +931,7 @@ int vmw_du_cursor_plane_atomic_check(struct drm_plane *plane, int vmw_du_crtc_atomic_check(struct drm_crtc *crtc, struct drm_atomic_state *state) {
struct vmw_private *vmw = vmw_priv(crtc->dev); struct drm_crtc_state *new_state = drm_atomic_get_new_crtc_state(state, crtc); struct vmw_display_unit *du = vmw_crtc_to_du(new_state->crtc);@@ -938,9 +939,13 @@ int vmw_du_crtc_atomic_check(struct drm_crtc *crtc, bool has_primary = new_state->plane_mask & drm_plane_mask(crtc->primary);
/* We always want to have an active plane with an active CRTC */if (has_primary != new_state->enable)return -EINVAL;
/** This is fine in general, but broken userspace might expect* some actual rendering so give a clue as why it's blank.*/if (new_state->enable && !has_primary)drm_dbg_driver(&vmw->drm,"CRTC without a primary plane will be blank.\n"); if (new_state->connector_mask != connector_mask &&-- 2.40.1
LGTM!
Reviewed-by: Martin Krastev martin.krastev@broadcom.com
Regards, Martin