litmus-rt-ext-res.git/drivers/gpu/drm/tegra, branch EXT-RES

drm/tegra: dpaux: Fix error handling

2017-01-19T19:17:58+00:00

commit 9376cad2073d2c122864754ea5f80025c8507b0b upstream.

The devm_pinctrl_register() function returns an error pointer or a valid
handle. So checking for NULL here is pointless and can never trigger.

Check the returned value with IS_ERR instead and propagate this value as
done in the other functions which call devm_pinctrl_register().

Fixes: 0751bb5c44fe ("drm/tegra: dpaux: Add pinctrl support")
Signed-off-by: Christophe JAILLET 
Acked-by: Jon Hunter 
Signed-off-by: Thierry Reding 
Signed-off-by: Greg Kroah-Hartman

drm/prime: Take a ref on the drm_dev when exporting a dma_buf

2016-10-05T13:30:32+00:00

dma_buf may live a long time, longer than the last direct user of the
driver. We already hold a reference to the owner module (that prevents
the object code from disappearing), but there is no reference to the
drm_dev - so the pointers to the driver backend themselves may vanish.

v2: Resist temptation to fix the bug in armada_gem.c not setting the
correct flags on the exported dma-buf (it should pass the flags through
and not be arbitrarily setting O_RDWR).

Use a common wrapper for exporting the dmabuf and acquiring the
reference to the drm_device.

Testcase: igt/vgem_basic/unload
Suggested-by: Daniel Vetter 
Signed-off-by: Chris Wilson 
Cc: Petri Latvala 
Cc: Daniel Vetter 
Cc: stable@vger.kernel.org
Tested-by: Petri Latvala 
Reviewed-by: Christian König 
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/20161005122145.1507-2-chris@chris-wilson.co.uk

Merge tag 'drm/tegra/for-4.9-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

2016-09-30T03:00:36+00:00

drm/tegra: Changes for v4.9-rc1

One bugfix that avoids overwriting the Y plane base address when
displaying buffers with one of the YUV/YVU formats.

* tag 'drm/tegra/for-4.9-rc1' of git://anongit.freedesktop.org/tegra/linux:
  drm/tegra: Fix window[0] base address corruption

Merge tag 'v4.8-rc8' into drm-next

2016-09-28T02:08:49+00:00

Linux 4.8-rc8

There was a lot of fallout in the imx/amdgpu/i915 drivers, so backmerge
it now to avoid troubles.

* tag 'v4.8-rc8': (1442 commits)
  Linux 4.8-rc8
  fault_in_multipages_readable() throws set-but-unused error
  mm: check VMA flags to avoid invalid PROT_NONE NUMA balancing
  radix tree: fix sibling entry handling in radix_tree_descend()
  radix tree test suite: Test radix_tree_replace_slot() for multiorder entries
  fix memory leaks in tracing_buffers_splice_read()
  tracing: Move mutex to protect against resetting of seq data
  MIPS: Fix delay slot emulation count in debugfs
  MIPS: SMP: Fix possibility of deadlock when bringing CPUs online
  mm: delete unnecessary and unsafe init_tlb_ubc()
  huge tmpfs: fix Committed_AS leak
  shmem: fix tmpfs to handle the huge= option properly
  blk-mq: skip unmapped queues in blk_mq_alloc_request_hctx
  MIPS: Fix pre-r6 emulation FPU initialisation
  arm64: kgdb: handle read-only text / modules
  arm64: Call numa_store_cpu_info() earlier.
  locking/hung_task: Fix typo in CONFIG_DETECT_HUNG_TASK help text
  nvme-rdma: only clear queue flags after successful connect
  i2c: qup: skip qup_i2c_suspend if the device is already runtime suspended
  perf/core: Limit matching exclusive events to one PMU
  ...

drm: Don't swallow error codes in drm_dev_alloc()

2016-09-22T11:03:48+00:00

There are many reasons other than ENOMEM that drm_dev_init() can
fail. Return ERR_PTR rather than NULL to be able to distinguish
these in the caller.

Signed-off-by: Tom Gundersen 
Signed-off-by: Sean Paul 
Link: http://patchwork.freedesktop.org/patch/msgid/20160921145919.13754-2-teg@jklm.no

drm/atomic-helper: Add NO_DISABLE_AFTER_MODESET flag support for plane commit

2016-08-29T09:29:37+00:00

Drivers may set the NO_DISABLE_AFTER_MODESET flag in the 'flags' parameter
of the helper drm_atomic_helper_commit_planes() if the relevant display
controllers(e.g., IPUv3 for imx-drm) require to disable a CRTC's planes
when the CRTC is disabled. The helper would skip the ->atomic_disable
call for a plane if the CRTC of the old plane state needs a modesetting
operation. Of course, the drivers need to disable the planes in their CRTC
disable callbacks since no one else would do that.

Suggested-by: Daniel Vetter 
Cc: Philipp Zabel 
Cc: David Airlie 
Cc: Russell King 
Cc: Peter Senna Tschudin 
Cc: Lucas Stach 
Signed-off-by: Liu Ying 
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/1472461923-14364-1-git-send-email-gnuiyl@gmail.com

drm/tegra: Fix window[0] base address corruption

2016-08-24T14:15:09+00:00

Window uses shared stride for UV planes and tegra_dc_window struct
defines array of 2 strides per window. That's not taken in account
during setting up of the window addresses and strides, resulting in
out-of-bounds write of the 3-rd (non-existent) V plane stride that
overwrites Y plane base address.

Signed-off-by: Dmitry Osipenko 
[treding@nvidia.com: explain why the V-plane stride is ignored]
Signed-off-by: Thierry Reding

drm/tegra: dsi: Enhance runtime power management

2016-08-24T13:58:57+00:00

The MIPI DSI output on Tegra SoCs requires some external logic to
calibrate the MIPI pads before a video signal can be transmitted. This
MIPI calibration logic requires to be powered on while the MIPI pads are
being used, which is currently done as part of the DSI driver's probe
implementation.

This is suboptimal because it will leave the MIPI calibration logic
powered up even if the DSI output is never used.

On Tegra114 and earlier this behaviour also causes the driver to hang
while trying to power up the MIPI calibration logic because the power
partition that contains the MIPI calibration logic will be powered on
by the display controller at output pipeline configuration time. Thus
the power up sequence for the MIPI calibration logic happens before
it's power partition is guaranteed to be enabled.

Fix this by splitting up the API into a request/free pair of functions
that manage the runtime dependency between the DSI and the calibration
modules (no registers are accessed) and a set of enable, calibrate and
disable functions that program the MIPI calibration logic at points in
time where the power partition is really enabled.

While at it, make sure that the runtime power management also works in
ganged mode, which is currently also broken.

Reported-by: Jonathan Hunter 
Tested-by: Jonathan Hunter 
Signed-off-by: Thierry Reding

drm: Don't implement empty prepare_fb()/cleanup_fb()

2016-08-19T08:58:55+00:00

The plane .prepare_fb() and .cleanup_fb() helpers are optional, there's
no need to implement empty stubs, and no need to explicitly set the
function pointers to NULL either.

Signed-off-by: Laurent Pinchart 
[danvet: Resolved conflicts with Chris' patch.]
Signed-off-by: Daniel Vetter

drm: Allow drivers to modify plane_state in prepare_fb/cleanup_fb

2016-08-19T08:58:55+00:00

The drivers have to modify the atomic plane state during the prepare_fb
callback so they track allocations, reservations and dependencies for
this atomic operation involving this fb. In particular, how else do we
set the plane->fence from the framebuffer!

Signed-off-by: Chris Wilson 
Cc: Daniel Vetter 
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Daniel Vetter 
Link: http://patchwork.freedesktop.org/patch/msgid/20160818180017.20508-1-chris@chris-wilson.co.uk