From 62ef0dd3cc0c217c3d58a1e92577c66c08598f7b Mon Sep 17 00:00:00 2001 From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Date: Thu, 20 Sep 2018 12:27:06 +0200 Subject: [PATCH] drm/i915: Unconditionally clear plane visibility, v2. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit We need to assume the plane has been visible before, even if no CRTC is assigned to the plane. This is because when enabling a nv12 plane on gen11, we will have to enable an 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 <maarten.lankhorst@linux.intel.com> [mlankhorst: Clear nv12_planes in the beginning as well, clarify commit message] Reviewed-by: Matt Roper <matthew.d.roper@intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180920102711.4184-4-maarten.lankhorst@linux.intel.com --- drivers/gpu/drm/i915/intel_atomic_plane.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_atomic_plane.c b/drivers/gpu/drm/i915/intel_atomic_plane.c index aabebe0d2e9b4..59f6ab60904d2 100644 --- a/drivers/gpu/drm/i915/intel_atomic_plane.c +++ b/drivers/gpu/drm/i915/intel_atomic_plane.c @@ -117,10 +117,14 @@ 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); + crtc_state->nv12_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; @@ -128,13 +132,9 @@ 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); - else - crtc_state->nv12_planes &= ~BIT(intel_plane->id); return intel_plane_atomic_calc_changes(old_crtc_state, &crtc_state->base, @@ -152,6 +152,7 @@ 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; -- GitLab