If the requested buffer size wasn't a multiple of the page size, the
IOMMU code would round down the size to the next multiple of the page
size, thereby causing translation errors. To fix this we no longer pass
around the requested size but reuse the computed size of the GEM object.
This is already rounded to the next page boundary, so mapping that size
works out fine.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Buffers obtained via shmem may still have associated cachelines. If they
aren't properly flushed they may cause framebuffer corruption if the
cache gets flushed after the application has drawn to it.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Page-flip completion could race with page-flip submission, so extend the
critical section to include all accesses to page-flip related data.
Reported-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The hardware pipe numbers don't always match the DRM CRTC indices. This
can happen for example if the first display controller defers probe,
causing it to be registered with DRM after the second display
controller. When that happens the hardware pipe numbers and DRM CRTC
indices become different. Make sure that the CRTC index is always used
when accessing per-CRTC VBLANK data. This can be ensured by using the
drm_crtc_vblank_*() API, which will do the right thing automatically
given a struct drm_crtc *.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The highlights in this pull request are:
* IOMMU support: The Tegra DRM driver can now deal with discontiguous
buffers if an IOMMU exists in the system. That means it can allocate
using drm_gem_get_pages() and will map them into IOVA space via the
IOMMU API. Similarly, non-contiguous PRIME buffers can be imported
from a different driver, which allows better integration with gk20a
(nouveau) and less hacks.
* Universal planes: This is precursory work for atomic modesetting and
will allow hardware cursor support to be implemented on pre-Tegra114
where RGB cursors were not supported.
* DSI ganged-mode support: The DSI controller can now gang up with a
second DSI controller to drive high resolution DSI panels.
Besides those bigger changes there is a slew of fixes, cleanups, plugged
memory leaks and so on.
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Merge tag 'drm/tegra/for-3.19-rc1' of git://people.freedesktop.org/~tagr/linux into drm-next
drm/tegra: Changes for v3.19-rc1
The highlights in this pull request are:
* IOMMU support: The Tegra DRM driver can now deal with discontiguous
buffers if an IOMMU exists in the system. That means it can allocate
using drm_gem_get_pages() and will map them into IOVA space via the
IOMMU API. Similarly, non-contiguous PRIME buffers can be imported
from a different driver, which allows better integration with gk20a
(nouveau) and less hacks.
* Universal planes: This is precursory work for atomic modesetting and
will allow hardware cursor support to be implemented on pre-Tegra114
where RGB cursors were not supported.
* DSI ganged-mode support: The DSI controller can now gang up with a
second DSI controller to drive high resolution DSI panels.
Besides those bigger changes there is a slew of fixes, cleanups, plugged
memory leaks and so on.
* tag 'drm/tegra/for-3.19-rc1' of git://people.freedesktop.org/~tagr/linux: (44 commits)
drm/tegra: gem: Check before freeing CMA memory
drm/tegra: fb: Add error codes to error messages
drm/tegra: fb: Properly release GEM objects on failure
drm/tegra: Detach panel when a connector is removed
drm/tegra: Plug memory leak
drm/tegra: gem: Use more consistent data types
drm/tegra: fb: Do not destroy framebuffer
drm/tegra: gem: dumb: pitch and size are outputs
drm/tegra: Enable the hotplug interrupt only when necessary
drm/tegra: dc: Universal plane support
drm/tegra: dc: Registers are 32 bits wide
drm/tegra: dc: Factor out DC, window and cursor commit
drm/tegra: Add IOMMU support
drm/tegra: Fix error handling cleanup
drm/tegra: gem: Use dma_mmap_writecombine()
drm/tegra: gem: Remove redundant drm_gem_free_mmap_offset()
drm/tegra: gem: Cleanup tegra_bo_create_with_handle()
drm/tegra: gem: Extract tegra_bo_alloc_object()
drm/tegra: dsi: Set up PHY_TIMING & BTA_TIMING registers earlier
drm/tegra: dsi: Replace 1000000 by USEC_PER_SEC
...
dma_free_writecombine() must not be called on a buffer that couldn't be
allocated. Check for a valid virtual address before attempting to free
the memory to avoid a crash.
Reported-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
When fbdev initialization fails, make sure to unreference the GEM
objects properly. Note that we can't do this in the general error
unwinding path because ownership of the GEM object references is
transferred to the framebuffer upon creation.
Signed-off-by: Thierry Reding <treding@nvidia.com>
When the DRM device is torn down and the connector is removed, make sure
to detach the panel to make sure there are no dangling pointers.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Drop a reference instead of directly calling the framebuffer .destroy()
callback at fbdev free time. This is necessary to make sure the object
isn't destroyed if anyone else still has a reference.
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Thierry Reding <treding@nvidia.com>
When creating a dumb buffer object using the DRM_IOCTL_MODE_CREATE_DUMB
IOCTL, only the width, height, bpp and flags parameters are inputs. The
caller is not guaranteed to zero out or set handle, pitch and size, so
the driver must not treat these values as possible inputs.
Fixes a bug where running the Weston compositor on Tegra DRM would cause
an attempt to allocate a 3 GiB framebuffer to be allocated.
Fixes: de2ba664c3 ("gpu: host1x: drm: Add memory manager and fb")
Cc: stable@vger.kernel.org
Signed-off-by: Thierry Reding <treding@nvidia.com>
The hotplug handling needs access to the DRM device, which only appears
at ->init() time. Disable interrupts up until that time. Similarly, when
an output is removed, disable the hotplug interrupt again because the
DRM device (and with it the hotplug infrastructure) is going away.
Also make sure to only access the DRM device if it's available. Given
the above change for the hotplug interrupt this should really never
happen, but the extra check doesn't hurt either.
Signed-off-by: Thierry Reding <treding@nvidia.com>
This allows the primary plane and cursor to be exposed as regular
DRM/KMS planes, which is a prerequisite for atomic modesetting and gives
userspace more flexibility over controlling them.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Using an unsigned long type will cause these variables to become 64-bit
on 64-bit SoCs. In practice this should always work, but there's no need
for carrying around the additional 32 bits.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The sequence to commit changes to the DC, window or cursor configuration
is repetitive and can be extracted into separate functions for ease of
use.
Signed-off-by: Thierry Reding <treding@nvidia.com>
When an IOMMU device is available on the platform bus, allocate an IOMMU
domain and attach the display controllers to it. The display controllers
can then scan out non-contiguous buffers by mapping them through the
IOMMU.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The DRM driver's ->load() implementation didn't do a good job (no job at
all really) cleaning up on failure. Fix that by undoing any prior setup
when an error occurs. This requires a bit of rework to make it possible
to clean up fbdev midway.
This was tested by injecting errors at various points during the
initialization sequence and verifying that error cleanup didn't crash
and no memory leaked (using kmemleak).
Reported-by: Stéphane Marchesin <marcheu@chromium.org>
Reported-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
The drm_gem_object_release() function already performs this cleanup, so
there is no reason to do it explicitly.
Signed-off-by: Thierry Reding <treding@nvidia.com>
There is only a single location where the function needs to do cleanup.
Skip the error unwinding path and call the cleanup function directly
instead.
Signed-off-by: Thierry Reding <treding@nvidia.com>
This function implements the common buffer object allocation used for
both allocation and import paths.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Make sure the DSI PHY_TIMING and BTA_TIMING registers are initialized
when the clocks are set up as opposed to when the output is enabled.
This makes sure that the PHY timings are properly set up when the panel
is prepared and that DCS commands sent at that time use the appropriate
timings.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add support for sending MIPI DSI command packets from the host to a
peripheral. This is required for panels that need configuration before
they accept video data.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Implement ganged mode support for the Tegra DSI driver. The DSI host
controller to gang up with is specified via a phandle in the device tree
and the resolved DSI host controller used for the programming of the
ganged-mode registers.
Signed-off-by: Thierry Reding <treding@nvidia.com>
In preparation for adding ganged-mode support, this commit splits out
the tegra_dsi_set_timeout() function so that it can be reused for the
slave DSI controller.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Add support for DC-driven command mode. This is a mode where the video
stream sent by the display controller is packed into DCS command packets
(write_memory_start and write_memory_continue) by the DSI controller. It
can be used for panels with a remote framebuffer and is useful to save
power when used with a dynamic refresh rate (not yet supported by the
driver).
Signed-off-by: Thierry Reding <treding@nvidia.com>
For command mode panels, the DSI controller needs to be enabled and
configured so that panel drivers can send commands prior to the video
stream being enabled.
Move code from the monolithic output enable/disable functions into
smaller, reusable units to allow more fine-grained control over the
controller state.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The driver wasn't even attempting to do any cleanup when probing failed.
Fix this by releasing any resources acquired up to the point of failure
and putting the device back into the original state (reset, clocks off).
Signed-off-by: Thierry Reding <treding@nvidia.com>
DSI panels can always be hotplugged via the DSI bus' attach/detach
infrastructure, so unconditionally mark the connector hotpluggable.
While at it, also make sure that when a panel is detached the connector
is marked unconnected before calling into the DRM hotplug helpers to
reflect the correct state.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The common clock framework will take care of preparing and enabling the
parent of the DSI clock automatically.
Signed-off-by: Thierry Reding <treding@nvidia.com>
In preparation for supporting command mode panels, don't disable the
clock when the output is disabled. The output will be enabled only after
the panel has been programmed in command mode, so the clock must always
remain on.
As a side-effect, pad calibration now only needs to be done at driver
probe time, since neither power nor controller state will go away before
driver removal. While at it, use a 32-bit variable to store register
content because the registers are 32-bit even on 64-bit Tegra.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Rather than hardcoding them as macros, make the host and video FIFO
depths parameters so that they can be more easily adjusted if a new
generation of the Tegra SoC changes them.
While at it, set the depth of the video FIFO to the correct value of
1920 *words* rather than *bytes*.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Previously the panel and output were only enabled on encoder->dpms(). If
userspace called dpms on before doing a modeset, the driver would get into
a state where the connector had a dpms state of ON, but the encoder and output
were not enabled (because the encoder is not yet attached to the connector).
Subsequent dpms ON calls are ignored b/c the connector's state already matches
the desired state.
This patch enables/disables the panel and output on modeset as well, so we
can catch the above case.
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Both display controllers are in their own power partition. Currently the
driver relies on the assumption that these partitions are on (which is
the hardware default). However some bootloaders may disable them, so the
driver must make sure to turn them back on to avoid hangs.
Signed-off-by: Thierry Reding <treding@nvidia.com>
The introduction of the COMPILE_TEST dependency in commit 158b50aefa
(drm/tegra: Increase compile test coverage) removes the dependency on
COMMON_CLK (implicitly selected via ARCH_TEGRA, ARCH_MULTI_V7 and
ARCH_MULTIPLATFORM).
Reported-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Thierry Reding <treding@nvidia.com>
When the CRTC is enabled, make sure the VBLANK machinery is enabled.
Failure to do so will cause drm_vblank_get() to not enable the VBLANK on
the CRTC and VBLANK-synchronized page-flips won't work.
While at it, get rid of the legacy drm_vblank_pre_modeset() and
drm_vblank_post_modeset() calls that are replaced by drm_vblank_on()
and drm_vblank_off().
Reported-by: Alexandre Courbot <acourbot@nvidia.com>
Tested-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Just a bit of OCD cleanup on headers - this function isn't the core
interface any more but just a helper for drivers who haven't yet
transitioned to universal planes. Put the declaration at the right
spot and sprinkle necessary #includes over all drivers.
Maybe this helps to encourage driver maintainers to do the switch.
v2: Fix #include ordering for tegra, reported by 0-day builder.
v3: Include required headers, reported by Thierry.
Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Thierry Reding <treding@nvidia.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
v2: Don't forget git add, noticed by David.
Cc: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Acked-by: David Herrmann <dh.herrmann@gmail.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Rename the defines to have levels instead of values for vswing and
pre-emph levels as the values may differ in other scenarios like low vswing of
eDP1.4 where the values are different.
Done using following cocci patch for each define:
@@
@@
# define DP_TRAIN_VOLTAGE_SWING_400 (0 << 0)
+ # define DP_TRAIN_VOLTAGE_SWING_LEVEL_0 (0 << 0)
...
Signed-off-by: Sonika Jindal <sonika.jindal@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This merge window brings a good size of cleanups on various
platforms. Among the bigger ones:
* Removal of Samsung s5pc100 and s5p64xx platforms. Both of these have
lacked active support for quite a while, and after asking around nobody
showed interest in keeping them around. If needed, they could be
resurrected in the future but it's more likely that we would prefer
reintroduction of them as DT and multiplatform-enabled platforms
instead.
* OMAP4 controller code register define diet. They defined a lot of registers
that were never actually used, etc.
* Move of some of the Tegra platform code (PMC, APBIO, fuse, powergate)
to drivers/soc so it can be shared with 64-bit code. This also converts them
over to traditional driver models where possible.
* Removal of legacy gpio-samsung driver, since the last users have been
removed (moved to pinctrl)
Plus a bunch of smaller changes for various platforms that sort of
dissapear in the diffstat for the above. clps711x cleanups, shmobile
header file refactoring/moves for multiplatform friendliness, some misc
cleanups, etc.
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Merge tag 'cleanup-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC cleanups from Olof Johansson:
"This merge window brings a good size of cleanups on various platforms.
Among the bigger ones:
- Removal of Samsung s5pc100 and s5p64xx platforms. Both of these
have lacked active support for quite a while, and after asking
around nobody showed interest in keeping them around. If needed,
they could be resurrected in the future but it's more likely that
we would prefer reintroduction of them as DT and
multiplatform-enabled platforms instead.
- OMAP4 controller code register define diet. They defined a lot of
registers that were never actually used, etc.
- Move of some of the Tegra platform code (PMC, APBIO, fuse,
powergate) to drivers/soc so it can be shared with 64-bit code.
This also converts them over to traditional driver models where
possible.
- Removal of legacy gpio-samsung driver, since the last users have
been removed (moved to pinctrl)
Plus a bunch of smaller changes for various platforms that sort of
dissapear in the diffstat for the above. clps711x cleanups, shmobile
header file refactoring/moves for multiplatform friendliness, some
misc cleanups, etc"
* tag 'cleanup-for-3.17' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (117 commits)
drivers: CCI: Correct use of ! and &
video: clcd-versatile: Depend on ARM
video: fix up versatile CLCD helper move
MAINTAINERS: Add sdhci-st file to ARCH/STI architecture
ARM: EXYNOS: Fix build breakge with PM_SLEEP=n
MAINTAINERS: Remove Kirkwood
ARM: tegra: Convert PMC to a driver
soc/tegra: fuse: Set up in early initcall
ARM: tegra: Always lock the CPU reset vector
ARM: tegra: Setup CPU hotplug in a pure initcall
soc/tegra: Implement runtime check for Tegra SoCs
soc/tegra: fuse: fix dummy functions
soc/tegra: fuse: move APB DMA into Tegra20 fuse driver
soc/tegra: Add efuse and apbmisc bindings
soc/tegra: Add efuse driver for Tegra
ARM: tegra: move fuse exports to soc/tegra/fuse.h
ARM: tegra: export apb dma readl/writel
ARM: tegra: Use a function to get the chip ID
ARM: tegra: Sort includes alphabetically
ARM: tegra: Move includes to include/soc/tegra
...
Pull DRM updates from Dave Airlie:
"Like all good pull reqs this ends with a revert, so it must mean we
tested it,
[ Ed. That's _one_ way of looking at it ]
This pull is missing nouveau, Ben has been stuck trying to track down
a very longstanding bug that revealed itself due to some other
changes. I've asked him to send you a direct pull request for nouveau
once he cleans things up. I'm away until Monday so don't want to
delay things, you can make a decision on that when he sends it, I have
my phone so I can ack things just not really merge much.
It has one trivial conflict with your tree in armada_drv.c, and also
the pull request contains some component changes that are already in
your tree, the base tree from Russell went via Greg's tree already,
but some stuff still shows up in here that doesn't when I merge my
tree into yours.
Otherwise all pretty standard graphics fare, one new driver and
changes all over the place.
New drivers:
- sti kms driver for STMicroelectronics chipsets stih416 and stih407.
core:
- lots of cleanups to the drm core
- DP MST helper code merged
- universal cursor planes.
- render nodes enabled by default
panel:
- better panel interfaces
- new panel support
- non-continuous cock advertising ability
ttm:
- shrinker fixes
i915:
- hopefully ditched UMS support
- runtime pm fixes
- psr tracking and locking - now enabled by default
- userptr fixes
- backlight brightness fixes
- MST support merged
- runtime PM for dpms
- primary planes locking fixes
- gen8 hw semaphore support
- fbc fixes
- runtime PM on SOix sleep state hw.
- mmio base page flipping
- lots of vlv/chv fixes.
- universal cursor planes
radeon:
- Hawaii fixes
- display scalar support for non-fixed mode displays
- new firmware format support
- dpm on more asics by default
- GPUVM improvements
- uncached and wc GTT buffers
- BOs > visible VRAM
exynos:
- i80 interface support
- module auto-loading
- ipp driver consolidated.
armada:
- irq handling in crtc layer only
- crtc renumbering
- add component support
- DT interaction changes.
tegra:
- load as module fixes
- eDP bpp and sync polarity fixed
- DSI non-continuous clock mode support
- better support for importing buffers from nouveau
msm:
- mdp5/adq8084 v1.3 hw enablement
- devicetree clk changse
- ifc6410 board working
tda998x:
- component support
- DT documentation update
vmwgfx:
- fix compat shader namespace"
* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (551 commits)
Revert "drm: drop redundant drm_file->is_master"
drm/panel: simple: Use devm_gpiod_get_optional()
drm/dsi: Replace upcasting macro by function
drm/panel: ld9040: Replace upcasting macro by function
drm/exynos: dp: Modify driver to support drm_panel
drm/exynos: Move DP setup into commit()
drm/panel: simple: Add AUO B133HTN01 panel support
drm/panel: simple: Support delays in panel functions
drm/panel: simple: Add proper definition for prepare and unprepare
drm/panel: s6e8aa0: Add proper definition for prepare and unprepare
drm/panel: ld9040: Add proper definition for prepare and unprepare
drm/tegra: Add support for panel prepare and unprepare routines
drm/exynos: dsi: Add support for panel prepare and unprepare routines
drm/exynos: dpi: Add support for panel prepare and unprepare routines
drm/panel: simple: Add dummy prepare and unprepare routines
drm/panel: s6e8aa0: Add dummy prepare and unprepare routines
drm/panel: ld9040: Add dummy prepare and unprepare routines
drm/panel: Provide convenience wrapper for .get_modes()
drm/panel: add .prepare() and .unprepare() functions
drm/panel: simple: Remove simple-panel compatible
...
Mostly some cleanup all over the place. Pitch alignment limitations of
the display controller are now honored and job submission is 64-bit
safe.
The SOR output (used for eDP) properly configures sync signal polarities
according to the display mode rather than hard-coding them to some value
and the number of bits per color is now taken from the panel rather than
hard-coded to properly support 24-bit vs. 18-bit panels.
The DSI controller now properly supports non-continuous clock mode.
GEM objects can now have their flags and tiling mode modified via IOCTLs
to allow buffers imported from Nouveau to be properly displayed. Newer
generations of the Tegra display controller can also detile block linear
buffers at scan-out time.
Finally the driver now properly exports MODULE_DEVICE_TABLEs to allow it
to be automatically loaded when built as a module.
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Merge tag 'drm/tegra/for-3.17-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next
drm/tegra: Changes for v3.17-rc1
Mostly some cleanup all over the place. Pitch alignment limitations of
the display controller are now honored and job submission is 64-bit
safe.
The SOR output (used for eDP) properly configures sync signal polarities
according to the display mode rather than hard-coding them to some value
and the number of bits per color is now taken from the panel rather than
hard-coded to properly support 24-bit vs. 18-bit panels.
The DSI controller now properly supports non-continuous clock mode.
GEM objects can now have their flags and tiling mode modified via IOCTLs
to allow buffers imported from Nouveau to be properly displayed. Newer
generations of the Tegra display controller can also detile block linear
buffers at scan-out time.
Finally the driver now properly exports MODULE_DEVICE_TABLEs to allow it
to be automatically loaded when built as a module.
* tag 'drm/tegra/for-3.17-rc1' of git://anongit.freedesktop.org/tegra/linux:
drm/tegra: add MODULE_DEVICE_TABLEs
drm/tegra: dc - Reset controller on driver remove
drm/tegra: Properly align stride for framebuffers
drm/tegra: sor - Configure proper sync polarities
drm/tegra: sor - Use bits-per-color from panel
drm/tegra: Make job submission 64-bit safe
drm/tegra: Allow non-authenticated processes to create buffer objects
drm/tegra: Add SET/GET_FLAGS IOCTLs
drm/tegra: Add SET/GET_TILING IOCTLs
drm/tegra: Implement more tiling modes
drm/tegra: dsi - Handle non-continuous clock flag
drm/tegra: sor - missing unlock on error
Panels can now be more finely controlled via .prepare() and .unprepare()
callbacks in addition to .enable() and .disable(). New kerneldoc details
what they are supposed to do and when they should be called.
The simple panel driver gained support for a couple of new panels and it
is now possible to specify additional delays during power up and power
down sequences if panels require it.
DSI devices can now advertise that they support non-continuous clock
mode which will allow DSI host controllers to disable the high speed
clock after transmissions to save power.
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Merge tag 'drm/panel/for-3.17-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next
drm/panel: Changes for v3.17-rc1
Panels can now be more finely controlled via .prepare() and .unprepare()
callbacks in addition to .enable() and .disable(). New kerneldoc details
what they are supposed to do and when they should be called.
The simple panel driver gained support for a couple of new panels and it
is now possible to specify additional delays during power up and power
down sequences if panels require it.
DSI devices can now advertise that they support non-continuous clock
mode which will allow DSI host controllers to disable the high speed
clock after transmissions to save power.
* tag 'drm/panel/for-3.17-rc1' of git://anongit.freedesktop.org/tegra/linux: (30 commits)
drm/panel: simple: Use devm_gpiod_get_optional()
drm/dsi: Replace upcasting macro by function
drm/panel: ld9040: Replace upcasting macro by function
drm/exynos: dp: Modify driver to support drm_panel
drm/exynos: Move DP setup into commit()
drm/panel: simple: Add AUO B133HTN01 panel support
drm/panel: simple: Support delays in panel functions
drm/panel: simple: Add proper definition for prepare and unprepare
drm/panel: s6e8aa0: Add proper definition for prepare and unprepare
drm/panel: ld9040: Add proper definition for prepare and unprepare
drm/tegra: Add support for panel prepare and unprepare routines
drm/exynos: dsi: Add support for panel prepare and unprepare routines
drm/exynos: dpi: Add support for panel prepare and unprepare routines
drm/panel: simple: Add dummy prepare and unprepare routines
drm/panel: s6e8aa0: Add dummy prepare and unprepare routines
drm/panel: ld9040: Add dummy prepare and unprepare routines
drm/panel: Provide convenience wrapper for .get_modes()
drm/panel: add .prepare() and .unprepare() functions
drm/panel: simple: Remove simple-panel compatible
drm/panel: simple: Add Innolux N116BGE panel support
...
Modify tegra output driver to support the new panel calls:
prepare and unprepare.
Signed-off-by: Ajay Kumar <ajaykumar.rs@samsung.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
