linux-stable.git/drivers/gpu/drm/ast, branch linux-4.8.y

drivers/gpu/drm/ast: Fix infinite loop if read fails

2017-01-09T07:21:52+00:00

commit 298360af3dab45659810fdc51aba0c9f4097e4f6 upstream.

ast_get_dram_info() configures a window in order to access BMC memory.
A BMC register can be configured to disallow this, and if so, causes
an infinite loop in the ast driver which renders the system unusable.

Fix this by erroring out if an error is detected.  On powerpc systems with
EEH, this leads to the device being fenced and the system continuing to
operate.

Signed-off-by: Russell Currey 
Reviewed-by: Joel Stanley 
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/20161215051241.20815-1-ruscur@russell.cc
Signed-off-by: Greg Kroah-Hartman

Merge remote-tracking branch 'airlied/drm-next' into topic/drm-misc

2016-07-19T07:27:29+00:00

Backmerge drm-next to be able to apply Chris' connector_unregister_all
cleanup (need latest i915 and sun4i state for that).

Also there's a trivial conflict in ttm_bo.c that git rerere fails to
remember.

Signed-off-by: Daniel Vetter

drm/ast: make fbdev support really optional

2016-07-18T07:11:41+00:00

Currently enabling AST Server DRM support automatically pulls
in fbdev dependency. However this dep is unnecessary since
DRM core already handles this for us (DRM_FBDEV_EMULATION).

Signed-off-by: Tobias Jakobi 
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/1468586897-32298-20-git-send-email-tjakobi@math.uni-bielefeld.de

drm/ast: Delete an unnecessary check before drm_gem_object_unreference_unlocked()

2016-07-18T07:11:32+00:00

The drm_gem_object_unreference_unlocked() function tests whether
its argument is NULL and then returns immediately.
Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring 
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/f28c063f-ec56-e62b-9370-89ce833fa4e5@users.sourceforge.net

drm/ttm: remove dummy bo_move implementations

2016-07-07T18:54:34+00:00

It's pointless to only call the default implementation.

Reviewed-by: Alex Deucher 
Signed-off-by: Christian König 
Signed-off-by: Alex Deucher

Merge tag 'topic/drm-misc-2016-06-07' of git://anongit.freedesktop.org/drm-intel into drm-next

2016-06-09T01:19:28+00:00

As promised, piles of prep work all around:
- drm_atomic_state rework, prep for nonblocking commit helpers
- fence patches from Gustavo and Christian to prep for atomic fences and
  some cool work in ttm/amdgpu from Christian
- drm event prep for both nonblocking commit and atomic fences
- Gustavo seems on a crusade against the non-kms-native version of the
  vblank functions.
- prep work from Boris to nuke all the silly ->best_encoder
  implementations we have (we really only need that for truly dynamic
  cases like dvi-i vs dvi-d or dp mst selecting the right transcoder on
  intel)
- prep work from Laurent to rework the format handling functions
- and few small things all over

* tag 'topic/drm-misc-2016-06-07' of git://anongit.freedesktop.org/drm-intel: (47 commits)
  drm/dsi: Implement set tear scanline
  drm/fb_cma_helper: Implement fb_mmap callback
  drm/qxl: Remove useless drm_fb_get_bpp_depth() call
  drm/ast: Remove useless drm_fb_get_bpp_depth() call
  drm/atomic: Fix remaining places where !funcs->best_encoder is valid
  drm/core: Change declaration for gamma_set.
  Documentation: add fence-array to kernel DocBook
  drm/shmobile: use drm_crtc_vblank_{get,put}()
  drm/radeon: use drm_crtc_vblank_{get,put}()
  drm/qxl: use drm_crtc_vblank_{get,put}()
  drm/atmel: use drm_crtc_vblank_{get,put}()
  drm/armada: use drm_crtc_vblank_{get,put}()
  drm/amdgpu: use drm_crtc_vblank_{get,put}()
  drm/virtio: use drm_crtc_send_vblank_event()
  drm/udl: use drm_crtc_send_vblank_event()
  drm/qxl: use drm_crtc_send_vblank_event()
  drm/atmel: use drm_crtc_send_vblank_event()
  drm/armada: use drm_crtc_send_vblank_event()
  drm/doc: Switch to sphinx/rst fixed-width quoting
  drm/doc: Drop kerneldoc for static functions in drm_irq.c
  ...

drm/ast: Remove useless drm_fb_get_bpp_depth() call

2016-06-07T19:40:34+00:00

The function has no side effect and its returned values are ignored,
don't call it.

Signed-off-by: Laurent Pinchart 
Reviewed-by: Eric Engestrom 
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/1465236852-11710-1-git-send-email-laurent.pinchart@ideasonboard.com

drm/core: Change declaration for gamma_set.

2016-06-07T13:30:09+00:00

Change return value to int to propagate errors from gamma_set,
and remove start parameter. Updates always use the full size,
and some drivers even ignore the start parameter altogether.

This is needed for atomic drivers, where an atomic commit can
fail with -EINTR or -ENOMEM and should be restarted. This is already
and issue for drm_atomic_helper_legacy_set_gamma, which this patch
fixes up.

Changes since v1:
- Fix compiler warning. (Emil)
- Fix commit message (Daniel)

Cc: Alex Deucher 
Acked-by: Alex Deucher 
Cc: Christian König 
Cc: David Airlie 
Cc: Patrik Jakobsson 
Cc: Ben Skeggs 
Cc: Eric Anholt 
Cc: VMware Graphics 
Cc: Mathieu Larouche 
Cc: Thierry Reding 
Acked-by: Patrik Jakobsson 
Signed-off-by: Maarten Lankhorst 
[danvet: Improve commit message a bit more, mention that this fixes
the helper.]
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/742944bc-9f41-1acb-df4f-0fd4c8a10168@linux.intel.com

drm/ast: Use lockless gem BO free callback

2016-06-01T07:40:02+00:00

No dev->struct_mutex anywhere to be seen.

Cc: Dave Airlie 
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/1464630800-30786-3-git-send-email-daniel.vetter@ffwll.ch

drm: Remove unused drm_device from drm_gem_object_lookup()

2016-05-17T06:47:30+00:00

drm_gem_object_lookup() has never required the drm_device for its file
local translation of the user handle to the GEM object. Let's remove the
unused parameter and save some space.

Signed-off-by: Chris Wilson 
Cc: dri-devel@lists.freedesktop.org
Cc: Dave Airlie 
Cc: Daniel Vetter 
[danvet: Fixup kerneldoc too.]
Signed-off-by: Daniel Vetter