From: Rodrigo Vivi Date: Thu, 28 May 2015 17:21:16 +0000 (-0700) Subject: drm/i915: Return the frontbuffer flip to enable intel_crtc_enable_planes. X-Git-Tag: firefly_0821_release~176^2~1490^2~16 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2d847d45b2c988038194140fa3def4ac1342cb67;p=firefly-linux-kernel-4.4.55.git drm/i915: Return the frontbuffer flip to enable intel_crtc_enable_planes. Without this frontbuffer flip when enabling planes PSR got compromised and wasn't being enabled waiting forever on the flush that never arrived. Another solution would to create a enable_cursor function and split this frontbuffer flip among the different plane enable and disable functions. But if necessary this can be done in a follow up work. For now let's just fix the regression. It was removed by: commit 87d4300a7dbc19634018e147b4753f3c9bb5f471 Author: Maarten Lankhorst Date: Tue Apr 21 17:12:54 2015 +0300 drm/i915: Move intel_(pre_disable/post_enable)_primary to intel_display.c, and use it there. Cc: Maarten Lankhorst Signed-off-by: Rodrigo Vivi Signed-off-by: Daniel Vetter --- diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 067b1dee1b90..4e3f302d86f7 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4828,11 +4828,22 @@ intel_pre_disable_primary(struct drm_crtc *crtc) static void intel_crtc_enable_planes(struct drm_crtc *crtc) { + struct drm_device *dev = crtc->dev; + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + int pipe = intel_crtc->pipe; + intel_enable_primary_hw_plane(crtc->primary, crtc); intel_enable_sprite_planes(crtc); intel_crtc_update_cursor(crtc, true); intel_post_enable_primary(crtc); + + /* + * FIXME: Once we grow proper nuclear flip support out of this we need + * to compute the mask of flip planes precisely. For the time being + * consider this a flip to a NULL plane. + */ + intel_frontbuffer_flip(dev, INTEL_FRONTBUFFER_ALL_MASK(pipe)); } static void intel_crtc_disable_planes(struct drm_crtc *crtc)