linux-stable.git/drivers/gpu, branch v3.12.69

drm/radeon: Ensure vblank interrupt is enabled on DPMS transition to on

2016-12-12T12:55:54+00:00

NOTE: This patch only applies to 4.5.y or older kernels. With newer
kernels, this problem cannot happen because the driver now uses
drm_crtc_vblank_on/off instead of drm_vblank_pre/post_modeset[0]. I
consider this patch safer for older kernels than backporting the API
change, because drm_crtc_vblank_on/off had various issues in older
kernels, and I'm not sure all fixes for those have been backported to
all stable branches where this patch could be applied.

    ---------------------

Fixes the vblank interrupt being disabled when it should be on, which
can cause at least the following symptoms:

* Hangs when running 'xset dpms force off' in a GNOME session with
  gnome-shell using DRI2.
* RandR 1.4 slave outputs freezing with garbage displayed using
  xf86-video-ati 7.8.0 or newer.

[0] See upstream commit:

commit 777e3cbc791f131806d9bf24b3325637c7fc228d
Author: Daniel Vetter 
Date:   Thu Jan 21 11:08:57 2016 +0100

    drm/radeon: Switch to drm_vblank_on/off

Reported-and-Tested-by: Max Staudt 
Reviewed-by: Daniel Vetter 
Reviewed-by: Alex Deucher 
Signed-off-by: Michel Dänzer

drm/exynos: fix error handling in exynos_drm_subdrv_open

2016-11-24T15:23:34+00:00

commit 55c4b906aa2aec3fa66310ec03c6842e34a04b2a upstream.

gcc-6 warns about a pointless loop in exynos_drm_subdrv_open:

drivers/gpu/drm/exynos/exynos_drm_core.c: In function 'exynos_drm_subdrv_open':
drivers/gpu/drm/exynos/exynos_drm_core.c:104:199: error: self-comparison always evaluates to false [-Werror=tautological-compare]
  list_for_each_entry_reverse(subdrv, &subdrv->list, list) {

Here, the list_for_each_entry_reverse immediately terminates because
the subdrv pointer is compared to itself as the loop end condition.

If we were to take the current subdrv pointer as the start of the
list (as we would do if list_for_each_entry_reverse() was not a macro),
we would iterate backwards over the &exynos_drm_subdrv_list anchor,
which would be even worse.

Instead, we need to use list_for_each_entry_continue_reverse()
to go back over each subdrv that was successfully opened until
the first entry.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Inki Dae 
Signed-off-by: Jiri Slaby

drm/radeon: drop register readback in cayman_cp_int_cntl_setup

2016-11-24T15:23:32+00:00

commit 537b4b462caa8bfb9726d9695b8e56e2d5e6b41e upstream.

The read is taking a considerable amount of time (about 50us on this
machine). The register does not ever hold anything other than the ring
ID that is updated in this exact function, so there is no need for
the read modify write cycle.

This chops off a big chunk of the time spent in hardirq disabled
context, as this function is called multiple times in the interrupt
handler. With this change applied radeon won't show up in the list
of the worst IRQ latency offenders anymore, where it was a regular
before.

Reviewed-by: Christian König 
Signed-off-by: Lucas Stach 
Signed-off-by: Alex Deucher 
Signed-off-by: Jiri Slaby

drm/radeon/si_dpm: workaround for SI kickers

2016-11-24T15:23:32+00:00

commit 7dc86ef5ac91642dfc3eb93ee0f0458e702a343e upstream.

Consolidate existing quirks. Fixes stability issues
on some kickers.

Signed-off-by: Alex Deucher 
Signed-off-by: Alex Deucher 
Signed-off-by: Jiri Slaby

drm/radeon/si_dpm: Limit clocks on HD86xx part

2016-11-24T15:23:31+00:00

commit fb9a5b0c1c9893db2e0d18544fd49e19d784a87d upstream.

Limit clocks on a specific HD86xx part to avoid
crashes (while awaiting an appropriate PP fix).

Signed-off-by: Tom St Denis 
Reviewed-by: Alex Deucher 
Signed-off-by: Jiri Slaby

drm/radeon: change vblank_time's calculation method to reduce computational error.

2016-11-08T15:38:22+00:00

commit 02cfb5fccb0f9f968f0e208d89d9769aa16267bc upstream.

Ported from Rex's amdgpu change.

Signed-off-by: Alex Deucher 
Signed-off-by: Jiri Slaby

drm/radeon/si/dpm: fix phase shedding setup

2016-11-08T15:38:21+00:00

commit 427920292b00474d978d632bc03a8e4e50029af3 upstream.

Used the wrong index to setup the phase shedding mask.

Signed-off-by: Alex Deucher 
Signed-off-by: Jiri Slaby

drm/radeon: narrow asic_init for virtualization

2016-11-08T15:38:21+00:00

commit 884031f0aacf57dad1575f96714efc80de9b19cc upstream.

Only needed on CIK+ due to the way pci reset is handled
by the GPU.

Signed-off-by: Alex Deucher 
Signed-off-by: Jiri Slaby

drm/radeon/si/dpm: add workaround for for Jet parts

2016-10-07T08:03:58+00:00

commit 670bb4fd21c966d0d2a59ad4a99bb4889f9a2987 upstream.

Add clock quirks for Jet parts.

Reviewed-by: Sonny Jiang 
Tested-by: Sonny Jiang 
Signed-off-by: Alex Deucher 
Signed-off-by: Alex Deucher 
Signed-off-by: Jiri Slaby

qxl: check for kmap failures

2016-10-06T06:21:58+00:00

commit f4cceb2affcd1285d4ce498089e8a79f4cd2fa66 upstream.

If kmap fails, it leads to memory corruption.

Fixes: f64122c1f6ad ('drm: add new QXL driver. (v1.4)')
Signed-off-by: Dan Carpenter 
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/20160711084633.GA31411@mwanda
Signed-off-by: Jiri Slaby