linux-stable.git/drivers/gpu/drm, branch v3.2.63

drm/radeon: load the lm63 driver for an lm64 thermal chip.

2014-09-13T22:41:43+00:00

commit 5dc355325b648dc9b4cf3bea4d968de46fd59215 upstream.

Looks like the lm63 driver supports the lm64 as well.

Signed-off-by: Alex Deucher 
Signed-off-by: Ben Hutchings

drm/ttm: Fix possible stack overflow by recursive shrinker calls.

2014-09-13T22:41:43+00:00

commit 71336e011d1d2312bcbcaa8fcec7365024f3a95d upstream.

While ttm_dma_pool_shrink_scan() tries to take mutex before doing GFP_KERNEL
allocation, ttm_pool_shrink_scan() does not do it. This can result in stack
overflow if kmalloc() in ttm_page_pool_free() triggered recursion due to
memory pressure.

  shrink_slab()
  => ttm_pool_shrink_scan()
     => ttm_page_pool_free()
        => kmalloc(GFP_KERNEL)
           => shrink_slab()
              => ttm_pool_shrink_scan()
                 => ttm_page_pool_free()
                    => kmalloc(GFP_KERNEL)

Change ttm_pool_shrink_scan() to do like ttm_dma_pool_shrink_scan() does.

Signed-off-by: Tetsuo Handa 
Signed-off-by: Dave Airlie 
[bwh: Backported to 3.2:
 - Adjust context
 - Change return value in the contended case to follow the old shrinker
   API]   
Signed-off-by: Ben Hutchings

drm/radeon: fix irq ring buffer overflow handling

2014-09-13T22:41:39+00:00

commit e8c214d22e76dd0ead38f97f8d2dc09aac70d651 upstream.

We must mask out the overflow bit as well, otherwise
the wptr will never match the rptr again and the interrupt
handler will loop forever.

Signed-off-by: Christian König 
Signed-off-by: Alex Deucher 
Reviewed-by: Michel Dänzer 
[bwh: Backported to 3.2: drop changes for unsupported GPUs]
Signed-off-by: Ben Hutchings

drm/radeon: avoid leaking edid data

2014-08-06T17:07:38+00:00

commit 0ac66effe7fcdee55bda6d5d10d3372c95a41920 upstream.

In some cases we fetch the edid in the detect() callback
in order to determine what sort of monitor is connected.
If that happens, don't fetch the edid again in the get_modes()
callback or we will leak the edid.

Signed-off-by: Alex Deucher 
Signed-off-by: Ben Hutchings

drm/radeon/dp: return -EIO for flags not zero case

2014-08-06T17:07:37+00:00

commit f6be5e64500abbba44e191e1ca0f3366c7d0291b upstream.

If there are error flags in the aux transaction return
-EIO rather than -EBUSY.  -EIO restarts the whole transaction
while -EBUSY jus retries.  Fixes problematic aux transfers.

Bug:
https://bugs.freedesktop.org/show_bug.cgi?id=80684

Signed-off-by: Alex Deucher 
[bwh: Backported to 3.2: error code is returned directly here]
Signed-off-by: Ben Hutchings

drm/vmwgfx: Fix incorrect write to read-only register v2:

2014-08-06T17:07:34+00:00

commit 4e578080ed3262ed2c3985868539bc66218d25c0 upstream.

Commit "drm/vmwgfx: correct fb_fix_screeninfo.line_length", while fixing a
vmwgfx fbdev bug, also writes the pitch to a supposedly read-only register:
SVGA_REG_BYTES_PER_LINE, while it should be (and also in fact is) written to
SVGA_REG_PITCHLOCK.

This patch is Cc'd stable because of the unknown effects writing to this
register might have, particularly on older device versions.

v2: Updated log message.

Cc: Christopher Friedt 
Tested-by: Christopher Friedt 
Signed-off-by: Thomas Hellstrom 
Reviewed-by: Jakob Bornecrantz 
Signed-off-by: Ben Hutchings

drm: fix NULL pointer access by wrong ioctl

2014-07-11T12:33:55+00:00

commit 1539fb9bd405ee32282ea0a38404f9e008ac5b7a upstream.

If user uses wrong ioctl command with _IOC_NONE and argument size
greater than 0, it can cause NULL pointer access from memset of line
463. If _IOC_NONE, don't memset to 0 for kdata.

Signed-off-by: Zhaowei Yuan 
Reviewed-by: David Herrmann 
Signed-off-by: Dave Airlie 
[bwh: Backported to 3.2: adjust indentation]
Signed-off-by: Ben Hutchings

drm/radeon: stop poisoning the GART TLB

2014-07-11T12:33:49+00:00

commit 0986c1a55ca64b44ee126a2f719a6e9f28cbe0ed upstream.

When we set the valid bit on invalid GART entries they are
loaded into the TLB when an adjacent entry is loaded. This
poisons the TLB with invalid entries which are sometimes
not correctly removed on TLB flush.

For stable inclusion the patch probably needs to be modified a bit.

Signed-off-by: Christian König 
Signed-off-by: Alex Deucher 
[bwh: Backported to 3.2: R600_PTE_GART is not defined and we list all the
 flags indvidually]
Signed-off-by: Ben Hutchings

drm/radeon: only apply hdmi bpc pll flags when encoder mode is hdmi

2014-07-11T12:33:45+00:00

commit 7d5ab3009a8ca777174f6f469277b3922d56fd4b upstream.

May fix display issues with non-HDMI displays.

Signed-off-by: Alex Deucher 
Signed-off-by: Ben Hutchings

drm/radeon/atom: fix dithering on certain panels

2014-07-11T12:33:45+00:00

commit 642528355c694f5ed68f6bff9ff520326a249f99 upstream.

We need to specify the encoder mode as LVDS for eDP
when using the Crtc_Source atom table in order to properly
set up the FMT hardware.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=73911

Signed-off-by: Alex Deucher 
Signed-off-by: Ben Hutchings