From 0d703d4e5d7094e77186d09619548de42be9b493 Mon Sep 17 00:00:00 2001 From: Matt Roper Date: Wed, 4 Mar 2015 10:49:04 -0800 Subject: [PATCH] drm/i915: Don't clobber plane state on internal disables We need to disable all sprite planes when disabling the CRTC. We had been using the top-level atomic 'disable' entrypoint to accomplish this, which was wrong. Not only can this lead to various locking issues, it also modifies the actual plane state, making it impossible to restore the plane properly later. For example, a DPMS off followed by a DPMS on will result in any sprite planes in use not being restored properly. The proper solution here is to call directly into our 'commit plane' hook with a copy of the plane's current state that has 'visible' set to false. Committing this dummy state will turn off the plane, but will not touch the actual plane->state pointer, allowing us to properly restore the plane state later. Signed-off-by: Matt Roper Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_display.c | 22 ++++++++++++++++++++-- 1 file changed, 20 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 8e9e18ccfcd8..3404da8e77b4 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4204,6 +4204,24 @@ static void intel_enable_sprite_planes(struct drm_crtc *crtc) } } +/* + * Disable a plane internally without actually modifying the plane's state. + * This will allow us to easily restore the plane later by just reprogramming + * its state. + */ +static void disable_plane_internal(struct drm_plane *plane) +{ + struct intel_plane *intel_plane = to_intel_plane(plane); + struct drm_plane_state *state = + plane->funcs->atomic_duplicate_state(plane); + struct intel_plane_state *intel_state = to_intel_plane_state(state); + + intel_state->visible = false; + intel_plane->commit_plane(plane, intel_state); + + intel_plane_destroy_state(plane, state); +} + static void intel_disable_sprite_planes(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; @@ -4213,8 +4231,8 @@ static void intel_disable_sprite_planes(struct drm_crtc *crtc) drm_for_each_legacy_plane(plane, &dev->mode_config.plane_list) { intel_plane = to_intel_plane(plane); - if (intel_plane->pipe == pipe) - plane->funcs->disable_plane(plane); + if (plane->fb && intel_plane->pipe == pipe) + disable_plane_internal(plane); } } -- 2.34.1