From: Matt Roper Date: Thu, 3 Dec 2015 19:37:36 +0000 (-0800) Subject: drm/i915: Disable primary plane if we fail to reconstruct BIOS fb (v2) X-Git-Tag: MMI-PSA29.97-13-9~7427^2~45^2~933 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=200757f5d7c6f7f7032a0a07bbb8c02a840bbf7d;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git drm/i915: Disable primary plane if we fail to reconstruct BIOS fb (v2) If we fail to reconstruct the BIOS fb (e.g., because the FB is too large), we'll be left with plane state that indicates the primary plane is visible yet has a NULL fb. This mismatch causes problems later on (e.g., for the watermark code). Since we've failed to reconstruct the BIOS FB, the best solution is to just disable the primary plane and pretend the BIOS never had it enabled. v2: Add intel_pre_disable_primary() call (Maarten) Cc: Daniel Vetter Cc: Ville Syrjälä Cc: Maarten Lankhorst Cc: drm-intel-fixes@lists.freedesktop.org Signed-off-by: Matt Roper Reviewed-by: Maarten Lankhorst Link: http://patchwork.freedesktop.org/patch/msgid/1449171462-30763-2-git-send-email-matthew.d.roper@intel.com --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 2786f484478c..11af6f52b3e4 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -118,6 +118,7 @@ static void skylake_pfit_enable(struct intel_crtc *crtc); static void ironlake_pfit_disable(struct intel_crtc *crtc, bool force); static void ironlake_pfit_enable(struct intel_crtc *crtc); static void intel_modeset_setup_hw_state(struct drm_device *dev); +static void intel_pre_disable_primary(struct drm_crtc *crtc); typedef struct { int min, max; @@ -2595,6 +2596,8 @@ intel_find_initial_plane_obj(struct intel_crtc *intel_crtc, struct drm_i915_gem_object *obj; struct drm_plane *primary = intel_crtc->base.primary; struct drm_plane_state *plane_state = primary->state; + struct drm_crtc_state *crtc_state = intel_crtc->base.state; + struct intel_plane *intel_plane = to_intel_plane(primary); struct drm_framebuffer *fb; if (!plane_config->fb) @@ -2631,6 +2634,18 @@ intel_find_initial_plane_obj(struct intel_crtc *intel_crtc, } } + /* + * We've failed to reconstruct the BIOS FB. Current display state + * indicates that the primary plane is visible, but has a NULL FB, + * which will lead to problems later if we don't fix it up. The + * simplest solution is to just disable the primary plane now and + * pretend the BIOS never had it enabled. + */ + to_intel_plane_state(plane_state)->visible = false; + crtc_state->plane_mask &= ~(1 << drm_plane_index(primary)); + intel_pre_disable_primary(&intel_crtc->base); + intel_plane->disable_plane(primary, &intel_crtc->base); + return; valid_fb: