From: Rodrigo Vivi Date: Wed, 8 Jul 2015 23:25:21 +0000 (-0700) Subject: drm/i915: fbdev restore mode needs to invalidate frontbuffer X-Git-Tag: firefly_0821_release~176^2~721^2~33^2~264 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d04df7325ac9def8c4a68b49822c1d0a0c5379c6;p=firefly-linux-kernel-4.4.55.git drm/i915: fbdev restore mode needs to invalidate frontbuffer This fbdev restore mode was another corner case that was now calling frontbuffer flip and flush and making we miss screen updates with PSR enabled. So let's also add the invalidate hack here while we don't have a reliable dirty fbdev op. v2: As pointed by Paulo: removed seg fault risk, used fb_helper when possible and put brackets on if. Cc: Paulo Zanoni Signed-off-by: Rodrigo Vivi Reviewed-by: Paulo Zanoni Testcase: igt/kms_fbcon_fbt/psr Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c index 25ce7b62d4d5..33b3c9233eac 100644 --- a/drivers/gpu/drm/i915/intel_fbdev.c +++ b/drivers/gpu/drm/i915/intel_fbdev.c @@ -824,11 +824,20 @@ void intel_fbdev_restore_mode(struct drm_device *dev) { int ret; struct drm_i915_private *dev_priv = dev->dev_private; + struct intel_fbdev *ifbdev = dev_priv->fbdev; + struct drm_fb_helper *fb_helper; - if (!dev_priv->fbdev) + if (!ifbdev) return; - ret = drm_fb_helper_restore_fbdev_mode_unlocked(&dev_priv->fbdev->helper); - if (ret) + fb_helper = &ifbdev->helper; + + ret = drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); + if (ret) { DRM_DEBUG("failed to restore crtc mode\n"); + } else { + mutex_lock(&fb_helper->dev->struct_mutex); + intel_fb_obj_invalidate(ifbdev->fb->obj, ORIGIN_GTT); + mutex_unlock(&fb_helper->dev->struct_mutex); + } }