Commit Graph

118 Commits

Author SHA1 Message Date
Arnd Bergmann 287980e49f remove lots of IS_ERR_VALUE abuses
Most users of IS_ERR_VALUE() in the kernel are wrong, as they
pass an 'int' into a function that takes an 'unsigned long'
argument. This happens to work because the type is sign-extended
on 64-bit architectures before it gets converted into an
unsigned type.

However, anything that passes an 'unsigned short' or 'unsigned int'
argument into IS_ERR_VALUE() is guaranteed to be broken, as are
8-bit integers and types that are wider than 'unsigned long'.

Andrzej Hajda has already fixed a lot of the worst abusers that
were causing actual bugs, but it would be nice to prevent any
users that are not passing 'unsigned long' arguments.

This patch changes all users of IS_ERR_VALUE() that I could find
on 32-bit ARM randconfig builds and x86 allmodconfig. For the
moment, this doesn't change the definition of IS_ERR_VALUE()
because there are probably still architecture specific users
elsewhere.

Almost all the warnings I got are for files that are better off
using 'if (err)' or 'if (err < 0)'.
The only legitimate user I could find that we get a warning for
is the (32-bit only) freescale fman driver, so I did not remove
the IS_ERR_VALUE() there but changed the type to 'unsigned long'.
For 9pfs, I just worked around one user whose calling conventions
are so obscure that I did not dare change the behavior.

I was using this definition for testing:

 #define IS_ERR_VALUE(x) ((unsigned long*)NULL == (typeof (x)*)NULL && \
       unlikely((unsigned long long)(x) >= (unsigned long long)(typeof(x))-MAX_ERRNO))

which ends up making all 16-bit or wider types work correctly with
the most plausible interpretation of what IS_ERR_VALUE() was supposed
to return according to its users, but also causes a compile-time
warning for any users that do not pass an 'unsigned long' argument.

I suggested this approach earlier this year, but back then we ended
up deciding to just fix the users that are obviously broken. After
the initial warning that caused me to get involved in the discussion
(fs/gfs2/dir.c) showed up again in the mainline kernel, Linus
asked me to send the whole thing again.

[ Updated the 9p parts as per Al Viro  - Linus ]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Andrzej Hajda <a.hajda@samsung.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: https://lkml.org/lkml/2016/1/7/363
Link: https://lkml.org/lkml/2016/5/27/486
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> # For nvmem part
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-27 15:26:11 -07:00
Linus Torvalds 266c73b777 Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
Pull drm updates from Dave Airlie:
 "This is the main drm pull request for 4.6 kernel.

  Overall the coolest thing here for me is the nouveau maxwell signed
  firmware support from NVidia, it's taken a long while to extract this
  from them.

  I also wish the ARM vendors just designed one set of display IP, ARM
  display block proliferation is definitely increasing.

  Core:
     - drm_event cleanups
     - Internal API cleanup making mode_fixup optional.
     - Apple GMUX vga switcheroo support.
     - DP AUX testing interface

  Panel:
     - Refactoring of DSI core for use over more transports.

  New driver:
     - ARM hdlcd driver

  i915:
     - FBC/PSR (framebuffer compression, panel self refresh) enabled by default.
     - Ongoing atomic display support work
     - Ongoing runtime PM work
     - Pixel clock limit checks
     - VBT DSI description support
     - GEM fixes
     - GuC firmware scheduler enhancements

  amdkfd:
     - Deferred probing fixes to avoid make file or link ordering.

  amdgpu/radeon:
     - ACP support for i2s audio support.
     - Command Submission/GPU scheduler/GPUVM optimisations
     - Initial GPU reset support for amdgpu

  vmwgfx:
     - Support for DX10 gen mipmaps
     - Pageflipping and other fixes.

  exynos:
     - Exynos5420 SoC support for FIMD
     - Exynos5422 SoC support for MIPI-DSI

  nouveau:
     - GM20x secure boot support - adds acceleration for Maxwell GPUs.
     - GM200 support
     - GM20B clock driver support
     - Power sensors work

  etnaviv:
     - Correctness fixes for GPU cache flushing
     - Better support for i.MX6 systems.

  imx-drm:
     - VBlank IRQ support
     - Fence support
     - OF endpoint support

  msm:
     - HDMI support for 8996 (snapdragon 820)
     - Adreno 430 support
     - Timestamp queries support

  virtio-gpu:
     - Fixes for Android support.

  rockchip:
     - Add support for Innosilicion HDMI

  rcar-du:
     - Support for 4 crtcs
     - R8A7795 support
     - RCar Gen 3 support

  omapdrm:
     - HDMI interlace output support
     - dma-buf import support
     - Refactoring to remove a lot of legacy code.

  tilcdc:
     - Rewrite of pageflipping code
     - dma-buf support
     - pinctrl support

  vc4:
     - HDMI modesetting bug fixes
     - Significant 3D performance improvement.

  fsl-dcu (FreeScale):
     - Lots of fixes

  tegra:
     - Two small fixes

  sti:
     - Atomic support for planes
     - Improved HDMI support"

* 'drm-next' of git://people.freedesktop.org/~airlied/linux: (1063 commits)
  drm/amdgpu: release_pages requires linux/pagemap.h
  drm/sti: restore mode_fixup callback
  drm/amdgpu/gfx7: add MTYPE definition
  drm/amdgpu: removing BO_VAs shouldn't be interruptible
  drm/amd/powerplay: show uvd/vce power gate enablement for tonga.
  drm/amd/powerplay: show uvd/vce power gate info for fiji
  drm/amdgpu: use sched fence if possible
  drm/amdgpu: move ib.fence to job.fence
  drm/amdgpu: give a fence param to ib_free
  drm/amdgpu: include the right version of gmc header files for iceland
  drm/radeon: fix indentation.
  drm/amd/powerplay: add uvd/vce dpm enabling flag to fix the performance issue for CZ
  drm/amdgpu: switch back to 32bit hw fences v2
  drm/amdgpu: remove amdgpu_fence_is_signaled
  drm/amdgpu: drop the extra fence range check v2
  drm/amdgpu: signal fences directly in amdgpu_fence_process
  drm/amdgpu: cleanup amdgpu_fence_wait_empty v2
  drm/amdgpu: keep all fences in an RCU protected array v2
  drm/amdgpu: add number of hardware submissions to amdgpu_fence_driver_init_ring
  drm/amdgpu: RCU protected amd_sched_fence_release
  ...
2016-03-21 13:48:00 -07:00
Dave Airlie 0e5dc9a8ee drm/tegra: Changes for v4.6-rc1
Only two cleanups this time around. One fixes reference counting of
 device tree nodes, the other changes the return value of a function
 from an unsigned int to an int to reflect that it will return error
 codes.
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Merge tag 'drm/tegra/for-4.6-rc1' of http://anongit.freedesktop.org/git/tegra/linux into drm-next

drm/tegra: Changes for v4.6-rc1

Only two cleanups this time around. One fixes reference counting of
device tree nodes, the other changes the return value of a function
from an unsigned int to an int to reflect that it will return error
codes.

* tag 'drm/tegra/for-4.6-rc1' of http://anongit.freedesktop.org/git/tegra/linux:
  gpu: host1x: Use a signed return type for do_relocs()
  gpu: host1x: bus: Add missing of_node_put()
2016-03-17 08:08:57 +10:00
Markus Elfring 341917fe2b gpu: host1x: Use a signed return type for do_relocs()
The return type "unsigned int" was used by the do_relocs() function
despite the fact that it will eventually return a negative error code.
Use a signed integer instead to accomodate for error codes.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2016-03-16 13:45:44 +01:00
Amitoj Kaur Chawla 93ec302976 gpu: host1x: bus: Add missing of_node_put()
for_each_child_of_node() performs an of_node_get() on each iteration, so
to break out of the loop an of_node_put() is required.

Found using Coccinelle. The semantic patch used for this is as follows:

// <smpl>
@@
expression e;
local idexpression n;
@@

 for_each_child_of_node(..., n) {
   ... when != of_node_put(n)
       when != e = n
(
   return n;
|
+  of_node_put(n);
?  return ...;
)
   ...
 }
// </smpl>

Signed-off-by: Amitoj Kaur Chawla <amitoj1606@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2016-03-16 13:45:43 +01:00
Luis R. Rodriguez f6e45661f9 dma, mm/pat: Rename dma_*_writecombine() to dma_*_wc()
Rename dma_*_writecombine() to dma_*_wc(), so that the naming
is coherent across the various write-combining APIs. Keep the
old names for compatibility for a while, these can be removed
at a later time. A guard is left to enable backporting of the
rename, and later remove of the old mapping defines seemlessly.

Build tested successfully with allmodconfig.

The following Coccinelle SmPL patch was used for this simple
transformation:

@ rename_dma_alloc_writecombine @
expression dev, size, dma_addr, gfp;
@@

-dma_alloc_writecombine(dev, size, dma_addr, gfp)
+dma_alloc_wc(dev, size, dma_addr, gfp)

@ rename_dma_free_writecombine @
expression dev, size, cpu_addr, dma_addr;
@@

-dma_free_writecombine(dev, size, cpu_addr, dma_addr)
+dma_free_wc(dev, size, cpu_addr, dma_addr)

@ rename_dma_mmap_writecombine @
expression dev, vma, cpu_addr, dma_addr, size;
@@

-dma_mmap_writecombine(dev, vma, cpu_addr, dma_addr, size)
+dma_mmap_wc(dev, vma, cpu_addr, dma_addr, size)

We also keep the old names as compatibility helpers, and
guard against their definition to make backporting easier.

Generated-by: Coccinelle SmPL
Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: airlied@linux.ie
Cc: akpm@linux-foundation.org
Cc: benh@kernel.crashing.org
Cc: bhelgaas@google.com
Cc: bp@suse.de
Cc: dan.j.williams@intel.com
Cc: daniel.vetter@ffwll.ch
Cc: dhowells@redhat.com
Cc: julia.lawall@lip6.fr
Cc: konrad.wilk@oracle.com
Cc: linux-fbdev@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Cc: luto@amacapital.net
Cc: mst@redhat.com
Cc: tomi.valkeinen@ti.com
Cc: toshi.kani@hp.com
Cc: vinod.koul@intel.com
Cc: xen-devel@lists.xensource.com
Link: http://lkml.kernel.org/r/1453516462-4844-1-git-send-email-mcgrof@do-not-panic.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-09 14:57:51 +01:00
Alexandre Courbot c95469aa5a gpu: host1x: Set DMA ops on device creation
Currently host1x-instanciated devices have their dma_ops left to NULL,
which makes any DMA operation (like buffer import) on ARM64 fallback
to the dummy_dma_ops and fail with an error.

This patch calls of_dma_configure() with the host1x node when creating
such a device, so the proper DMA operations are set.

Suggested-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2016-03-04 16:24:57 +01:00
Alexandre Courbot 097452e613 gpu: host1x: Set DMA mask
The default DMA mask covers a 32 bits address range, but host1x devices
can address a larger range on TK1 and TX1. Set the DMA mask to the range
addressable when we use the IOMMU to prevent the use of bounce buffers.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2016-03-04 16:24:56 +01:00
Thierry Reding a134789a67 gpu: host1x: Add Tegra210 support
The host1x unit found in Tegra210 SoCs is very similar to the unit in
Tegra124, but it has 2 additional channels for a total of 14 channels.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-12-14 10:50:33 +01:00
Thierry Reding e3e70814ce gpu: host1x: Remove core driver on unregister
When unregistering a host1x driver, make sure to unregister the core
driver as well to prevent it from sticking around and oppose reloading
of the driver.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-12-14 10:50:33 +01:00
Thierry Reding 28fae81f93 gpu: host1x: Use platform_register/unregister_drivers()
These new helpers simplify implementing multi-driver modules and
properly handle failure to register one driver by unregistering all
previously registered drivers.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-12-14 10:50:32 +01:00
Dmitry Osipenko 3fe2c7d4c8 gpu: host1x: Fix MLOCK's debug info
MLOCK's debug info, spewed on CDMA timeout, contains meaningless MLOCK
owner channel ID because HOST1X_SYNC_MLOCK_OWNER_CHID_F() returns shifted
value, while unshifted should be used. Fix it by changing '_F' to '_V'.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Reviewed-By: Terje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-10-02 14:40:12 +02:00
Thierry Reding 15372d4be7 gpu: host1x: mipi: Power down regulators when unused
Keep track of the number of users of DSI and CSI pads and power down the
regulators that supply the bricks when all users are gone.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-08-13 13:47:21 +02:00
Thierry Reding 5e7752436e gpu: host1x: mipi: Add Tegra210 support
Some changes are needed to the configuration settings for some lanes. In
addition, the clock lanes for the CSI pads can no longer be calibrated.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-08-13 13:47:20 +02:00
Thierry Reding 7fd3ecad3f gpu: host1x: mipi: Add Tegra132 support
While Tegra132 has the same pads as Tegra124, some configuration values
need to be programmed slightly differently.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-08-13 13:47:19 +02:00
Thierry Reding c22fb79099 gpu: host1x: mipi: Constify OF match table
This table is never modified and can therefore reside in read-only
memory.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-08-13 13:47:18 +02:00
Thierry Reding 2ed264bf91 gpu: host1x: mipi: Clear calibration status
Before starting a new calibration cycle, make sure to clear the current
status by writing a 1 to the various "calibration done" bits.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-08-13 13:47:17 +02:00
Thierry Reding 8ed5c06232 gpu: host1x: mipi: Fix clock lane register for DSI
Use more consistent names for the clock lane configuration registers and
fix the offset of the upper clock lane configuration register for the
first DSI pad.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-08-13 13:47:16 +02:00
Thierry Reding 83a3c223cc gpu: host1x: mipi: Parameterize to support future SoCs
Parameterize more of the register programming to accomodate for changes
required by future SoC generations.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-08-13 13:47:15 +02:00
Thierry Reding b4a20144e0 gpu: host1x: Export host1x_syncpt_read()
This function is used to read the current value of the syncpt and is
useful in situations where drivers don't schedule work and wait for the
syncpoint to increment. One particular use-case is using the syncpoint
as a VBLANK counter.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-04-02 18:46:20 +02:00
Thierry Reding f4c5cf88fb gpu: host1x: Provide a proper struct bus_type
Previously the struct bus_type exported by the host1x infrastructure was
only a very basic skeleton. Turn that implementation into a more full-
fledged bus to support proper probe ordering and power management.

Note that the bus infrastructure needs to be available before any of the
drivers can be registered. This is automatically ensured if all drivers
are built as loadable modules (via symbol dependencies). If all drivers
are built-in there are no such guarantees and the link order determines
the initcall ordering. Adjust drivers/gpu/Makefile to make sure that the
host1x bus infrastructure is initialized prior to any of its users (only
drm/tegra currently).

v2: Fix building host1x and tegra-drm as modules
    Reported-by: Dave Airlie <airlied@gmail.com>

Reviewed-by: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Mark Zhang <markz@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-01-27 10:09:14 +01:00
Thierry Reding 99d2cd81d7 gpu: host1x: Factor out __host1x_device_del()
This function is needed in several places, so factor it out.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-01-23 12:07:01 +01:00
Thierry Reding 38d98de433 gpu: host1x: Call host1x_device_add() under lock
Instead of locking within host1x_device_add(), call it under the lock to
make the locking more consistent.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-01-23 12:07:01 +01:00
Thierry Reding 536e171522 gpu: host1x: Call ->remove() only when a device is bound
When a driver's ->probe() function fails, the host1x bus must not call
its ->remove() function because the driver will already have cleaned up
in the error handling path in ->probe().

Signed-off-by: Thierry Reding <treding@nvidia.com>
2015-01-23 12:07:00 +01:00
Sean Paul b298e98ef6 gpu: host1x: mipi: Set MIPI_CAL_BIAS_PAD_CFG1 register
During calibration, sets the "internal reference level for drive pull-
down" to the value specified in the Tegra TRM.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-11-13 16:11:57 +01:00
Sean Paul 08a15cc34d gpu: host1x: mipi: Calibrate clock lanes
Include the clock lanes when calibrating the MIPI PHY on Tegra124
compatible devices.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
[treding@nvidia.com: bikeshedding]
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-11-13 16:11:54 +01:00
Sean Paul 26f7a92a3a gpu: host1x: mipi: Preserve the contents of MIPI_CAL_CTRL
By paving the CTRL reg value, the current code changes MIPI_CAL_PRESCALE
("Auto-cal calibration step prescale") from 1us to 0.1us (val=0). In the
description for PHY's noise filter (MIPI_CAL_NOISE_FLT), the TRM states
that if the value of the prescale is 0 (or 0.1us), the filter should be
set between 2-5. However, the current code sets it to 0.

For now, let's keep the prescale and filter values as-is, which is most
likely the power-on-reset values of 0x2 and 0xa, respectively.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-11-13 16:11:51 +01:00
Thierry Reding 57b17ae71f gpu: host1x: mipi: Registers are 32 bits wide
On 64-bit platforms an unsigned long would be 64 bit and cause
unnecessary casting when being passed to writel() or returned from
readl(). Make register values 32 bits wide to avoid that.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-11-13 16:11:48 +01:00
Thierry Reding 3880e95f27 gpu: host1x: Make gather offsets unsigned
Use the u32 type for the offset in the host1x_job_gather structure for
consistentcy with other structures. Negative offsets don't make sense in
this context.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-11-13 16:11:44 +01:00
Thierry Reding ba73fbc2ca gpu: host1x: Print address/offset pairs consistently
Consistently use a format of %pad+%#x to print address/offset in debug
messages.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-11-13 16:11:41 +01:00
Thierry Reding 7f27d60b28 gpu: host1x: Fix typo in comment
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-11-13 16:11:38 +01:00
Thierry Reding 0169b93f44 gpu: host1x: Make mapped field of push buffers void *
This reduces the amount of casting that needs to be done to get rid of
annoying warnings on 64-bit builds.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-11-13 16:11:35 +01:00
Thierry Reding b40d02bf96 gpu: host1x: Use struct host1x_bo pointers in traces
Rather than cast to a u32 use the struct host1x_bo pointers directly.
This avoid annoying warnings for 64-bit builds.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-11-13 16:11:32 +01:00
Thierry Reding 961e3beae3 drm/tegra: Make job submission 64-bit safe
Job submission currently relies on the fact that struct drm_tegra_reloc
and struct host1x_reloc are the same size and uses a simple call to the
copy_from_user() function to copy them to kernel space. This causes the
handle to be stored in the buffer object field, which then needs a cast
to a 32 bit integer to resolve it to a proper buffer object pointer and
store it back in the buffer object field.

On 64-bit architectures that will no longer work, since pointers are 64
bits wide whereas handles will remain 32 bits. This causes the sizes of
both structures to because different and copying will no longer work.

Fix this by adding a new function, host1x_reloc_get_user(), that copies
the structures field by field.

While at it, use substructures for the command and target buffers in
struct host1x_reloc for better readability. Also use unsized types to
make it more obvious that this isn't part of userspace ABI.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-08-04 10:07:36 +02:00
Thierry Reding 0c7dfd36b7 gpu: host1x: Rename internal functions for clarity
The internal host1x_{,un}register_client() functions can potentially be
confused with public the host1x_client_{,un}register() functions.

Rename them to host1x_{add,del}_client() to remove some of the possible
confusion.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-06-05 23:10:30 +02:00
Stephen Warren 22bbd5d949 gpu: host1x: handle the correct # of syncpt regs
BIT_WORD() truncates rather than rounds, so the loops in
syncpt_thresh_isr() and _host1x_intr_disable_all_syncpt_intrs() use <=
rather than < in an attempt to process the correct number of registers
when rounding of the conversion of count of bits to count of words is
necessary. However, when rounding isn't necessary because the value is
already a multiple of the divisor (as is the case for all values of
nb_pts the code actually sees), this causes one too many registers to
be processed.

Solve this by using and explicit DIV_ROUND_UP() call, rather than
BIT_WORD(), and comparing with < rather than <=.

Fixes: 7ede0b0bf3 ("gpu: host1x: Add syncpoint wait and interrupts")
Cc: <stable@vger.kernel.org> # 3.10
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-By: Terje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-04-16 17:11:04 +02:00
Dave Airlie 82c68b6ccd drm/tegra: Changes for v3.15-rc1
Implement eDP support for Tegra124 and support the PRIME vmap()/vunmap()
 operations.
 
 A symbol that is required for upcoming V4L2 support is now exported by
 the host1x driver.
 
 Relicense drivers under the GPL v2 for consistency. One exception is the
 public header file, which is relicensed under MIT to abide by the common
 rule.
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Merge tag 'drm/tegra/for-3.15-rc1' of git://anongit.freedesktop.org/tegra/linux into drm-next

drm/tegra: Changes for v3.15-rc1

Implement eDP support for Tegra124 and support the PRIME vmap()/vunmap()
operations.

A symbol that is required for upcoming V4L2 support is now exported by
the host1x driver.

Relicense drivers under the GPL v2 for consistency. One exception is the
public header file, which is relicensed under MIT to abide by the common
rule.

* tag 'drm/tegra/for-3.15-rc1' of git://anongit.freedesktop.org/tegra/linux:
  drm/tegra: Use standard GPL v2 license text
  drm/tegra: Relicense under GPL v2
  drm/tegra: Relicense public header under MIT
  drm/tegra: Add eDP support
  gpu: host1x: export host1x_syncpt_incr_max() function
  drm/tegra: prime: Add vmap support
2014-04-05 16:13:08 +10:00
Bryan Wu 64400c3791 gpu: host1x: export host1x_syncpt_incr_max() function
Tegra V4L2 camera driver needs this function to do frame capture.

Signed-off-by: Bryan Wu <pengw@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-04-04 09:12:49 +02:00
Erik Faye-Lund 89e6e8c85f gpu: host1x: do not check previously handled gathers
When patching gathers, we don't need to check against
gathers with lower indices than the current one, as
they are guaranteed to already have been handled.

Signed-off-by: Erik Faye-Lund <kusmabite@gmail.com>
Acked-By: Terje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-02-12 07:50:37 +01:00
Thierry Reding be2cd59b80 gpu: host1x: Remove unnecessary include
Nothing from the asm/mach/irq.h header is needed in this file, so there
is no need to include it.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2014-01-14 14:39:45 +01:00
Thierry Reding e6fff4aaf9 gpu: host1x: Add Tegra124 support
Tegra124 has 192 syncpoints whereas its predecessors had 32 syncpoints.
This required changes to the hardware register layout.

Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-12-19 09:29:52 +01:00
Thierry Reding 8e0d788c6f gpu: host1x: Fix build warnings
When debugfs support isn't enabled, gcc complains about some variables
being unused. To avoid further #ifdefery, move debugfs specific setup
code into static functions and use IS_ENABLED(CONFIG_DEBUG_FS) to have
the compiler, rather than the preprocessor, discard them when unused.
The advantage of doing it this way is that all the code will be
compile-tested whether or not debugfs support is enabled.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-12-19 09:29:52 +01:00
Thierry Reding 6f44c2b528 gpu: host1x: Increase compile test coverage
The ARCH_MULTIPLATFORM dependency was introduced back when Tegra didn't
support multiplatform yet as a means to allow the driver to be easily
compile-tested along with other DRM drivers. In the meantime, the new
COMPILE_TEST Kconfig option has been introduced for exactly that
purpose, so use that instead to clarify the intention.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-12-19 09:29:51 +01:00
Thierry Reding aef03d3fa5 gpu: host1x: Fix more sparse warnings
Include the linux/host1x.h and dev.h headers so that function prototypes
are visible to keep sparse from suggesting that their implementations be
made static.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-12-19 09:29:51 +01:00
Thierry Reding 18b94f1cfb gpu: host1x: Use the correct HW headers for host1x02
An earlier patch added a subset of the required HW specific header files
but didn't actually include the right ones when compiling for host1x02.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-12-19 09:29:51 +01:00
Thierry Reding fae798a156 gpu: host1x: Export public API
Make the public API symbols visible so that depending drivers can be
built as a module.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-12-19 09:29:50 +01:00
Thierry Reding 4de6a2d6ac gpu: host1x: Add MIPI pad calibration support
This driver adds support to perform calibration of the MIPI pads for CSI
and DSI.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-12-19 09:29:43 +01:00
Thierry Reding d24b2898ce gpu: host1x: Fix a few sparse warnings
Include the bus.h header, so that various function declarations are
visible in the source file that implements those functions. This keeps
sparse from suggesting that they should be made static.

Make the host1x_bus_type variable static since it isn't used globally.

Finally replace the slightly unsafe dev_set_name(dev, name) by the more
secure dev_set_name(dev, "%s", name).

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-12-03 10:06:29 +01:00
Olof Johansson 43dd5554fc gpu: host1x: Silence a few warnings with LPAE=y
When building with LPAE=y (64-bit dma_addr_t), the following warnings are seen:

drivers/gpu/host1x/hw/cdma_hw.c:57:3: warning: format '%x' expects
  argument of type 'unsigned int', but argument 5 has type 'dma_addr_t'

drivers/gpu/host1x/hw/debug_hw.c:167:10: warning: format '%x' expects
  argument of type 'unsigned int', but argument 3 has type 'dma_addr_t'

The agreed-to solution for this is upcast to u64 and using %llx.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-11-28 15:13:47 +01:00
Arto Merilainen f5a954fed9 gpu: host1x: Add syncpoint base support
This patch adds support for hardware syncpoint bases. This creates
a simple mechanism to stall the command FIFO until an operation is
completed.

Signed-off-by: Arto Merilainen <amerilainen@nvidia.com>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:55:48 +01:00