We need to assume the plane has been visible before, even if no CRTC is assigned to the plane. This is because nv12 will enable a a extra plane and make it visible by marking it in crtc_state->active_planes for intel_update_planes_on_crtc().
Additionally, clear visible flag in intel_plane_atomic_check, in case we ever hit a bug with visibility. Our code implicitly assumes that plane_state->visible is only true when crtc and fb are set, so we will either null deref in intel_fbc_choose_crtc() or do something bad during the actual commit which cares even more. Changes since v1: - Unconditionally clear crtc_state->active_planes as well. - Reword commit message, since this is now a preparation patch for NV12 Y / UV plane linking. Signed-off-by: Maarten Lankhorst <[email protected]> --- drivers/gpu/drm/i915/intel_atomic_plane.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c index aabebe0d2e9b..f70e9cb9cf02 100644 --- a/drivers/gpu/drm/i915/intel_atomic_plane.c +++ b/drivers/gpu/drm/i915/intel_atomic_plane.c @@ -117,10 +117,13 @@ int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_ struct intel_plane *intel_plane = to_intel_plane(plane); int ret; + crtc_state->active_planes &= ~BIT(intel_plane->id); + intel_state->base.visible = false; + + /* If this is a cursor plane, no further checks are needed. */ if (!intel_state->base.crtc && !old_plane_state->base.crtc) return 0; - intel_state->base.visible = false; ret = intel_plane->check_plane(crtc_state, intel_state); if (ret) return ret; @@ -128,8 +131,6 @@ int intel_plane_atomic_check_with_state(const struct intel_crtc_state *old_crtc_ /* FIXME pre-g4x don't work like this */ if (state->visible) crtc_state->active_planes |= BIT(intel_plane->id); - else - crtc_state->active_planes &= ~BIT(intel_plane->id); if (state->visible && state->fb->format->format == DRM_FORMAT_NV12) crtc_state->nv12_planes |= BIT(intel_plane->id); @@ -152,6 +153,7 @@ static int intel_plane_atomic_check(struct drm_plane *plane, const struct drm_crtc_state *old_crtc_state; struct drm_crtc_state *new_crtc_state; + new_plane_state->visible = false; if (!crtc) return 0; -- 2.18.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
