Imre Deak 564ed191f5 drm/i915: gmch: fix stuck primary plane due to memory self-refresh mode ... Blanking/unblanking the console in a loop on an Asus T100 sometimes leaves the console blank. After some digging I found that applying commit 61bc95c1fb Author: Egbert Eich <eich@suse.com> Date: Mon Mar 4 09:24:38 2013 -0500 DRM/i915: On G45 enable cursor plane briefly after enabling the display plane. fixed VLV too. In my case the problem seemed to happen already during the previous crtc disabling and went away if I disabled self-refresh mode before disabling the primary plane. The root cause for this is that updates from the shadow to live plane control register are blocked at vblank time if the memory self-refresh mode (aka max-fifo mode on VLV) is active at that moment. The controller checks at frame start time if the CPU is in C0 and the self-refresh mode enable bit is set and if so activates self-reresh mode, otherwise deactivates it. So to make sure that the plane truly gets disabled before pipe-off we have to: 1. disable memory self-refresh mode 2. disable plane 3. wait for vblank 4. disable pipe 5. wait for pipe-off v2: - add explanation for the root cause from HW team (Cesar Mancini et al) - remove note about the CPU C7S state, in my latest tests disabling it alone didn't make a difference - add vblank between disabling plane and pipe (Ville) - apply the same workaround for all gmch platforms (Ville) Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Vijay Purushothaman <vijay.a.purushothaman@intel.com> Reviewed-by: Deepak S<deepak.s@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>		2014-07-07 11:34:57 +02:00
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drm	drm/i915: gmch: fix stuck primary plane due to memory self-refresh mode	2014-07-07 11:34:57 +02:00
host1x	gpu: host1x: Rename internal functions for clarity	2014-06-05 23:10:30 +02:00
ipu-v3	Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux	2014-06-12 11:32:30 -07:00
vga	vgaswitcheroo: switch the mux to the igp on power down when runpm is enabled	2014-06-02 10:25:08 -04:00
Makefile	gpu: ipu-v3: Move i.MX IPUv3 core driver out of staging	2014-06-04 11:06:52 +02:00