Commit Graph

99 Commits

Author SHA1 Message Date
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
Arto Merilainen 8736fe8153 gpu: host1x: Add 'flags' field to syncpt request
Functions host1x_syncpt_request() and _host1x_syncpt_alloc() have
been taking a separate boolean flag ('client_managed') for indicating
if the syncpoint value should be tracked by the host1x driver.

This patch converts the field into generic 'flags' field so that
we can easily add more information while requesting a syncpoint.
Clients are adapted to use the new interface accordingly.

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 09:55:47 +01:00
Wei Yongjun 9c78c4c38e gpu: host1x: Disable clock on probe failure
Add a missing clk_disable_unprepare() before returning from the driver's
.probe() function on error.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Reviewed-by: Terje Bergstrom <tbergstrom@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:55:46 +01:00
Thierry Reding 5407f31bd3 gpu: host1x: Add support for Tegra114
Tegra114 uses a slightly updated version of host1x with an additional
syncpoint.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:55:41 +01:00
Thierry Reding dee8268f8f drm/tegra: Move driver to DRM tree
In order to make subsystem-wide changes easier, move the Tegra DRM
driver back into the DRM tree.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:55:40 +01:00
Thierry Reding fc3be3e8fc gpu: host1x: Use relative include paths
This is slightly safer than adding -Idrivers/gpu/host1x to cflags-y.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:55:40 +01:00
Thierry Reding 776dc38403 drm/tegra: Move subdevice infrastructure to host1x
The Tegra DRM driver currently uses some infrastructure to defer the DRM
core initialization until all required devices have registered. The same
infrastructure can potentially be used by any other driver that requires
more than a single sub-device of the host1x module.

Make the infrastructure more generic and keep only the DRM specific code
in the DRM part of the driver. Eventually this will make it easy to move
the DRM driver part back to the DRM subsystem.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:55:33 +01:00
Thierry Reding 35d747a81d gpu: host1x: Expose syncpt and channel functionality
Expose the buffer objects, syncpoint and channel functionality in the
public public header so that drivers can use them.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:11 +01:00
Thierry Reding 53fa7f7204 drm/tegra: Introduce tegra_drm_client structure
This structure derives from host1x_client. DRM-specific fields are moved
from host1x_client to this structure, so that host1x_client can remain
agnostic of DRM.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:10 +01:00
Thierry Reding e1e906448d gpu: host1x: Make host1x header file public
In preparation to support host1x clients other than DRM, move this
header into a public location.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:10 +01:00
Thierry Reding 3be8274341 drm/tegra: gem: Miscellaneous cleanups
Rename the host1x_to_drm_bo() macro to host1x_to_tegra_bo() for
consistency and fixup various stylistic issues.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:10 +01:00
Thierry Reding a137ce3438 drm/tegra: Rename gr2d to tegra-gr2d
Other drivers use the tegra- prefix in their names, so add it to this
driver's name as well for consistency.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:09 +01:00
Thierry Reding c1bef81fe7 drm/tegra: gr2d: Miscellaneous cleanups
Rework the address table code for the host1x firewall. The previous
implementation allocated a bitfield but didn't check for a valid pointer
so it could potentially crash. Instead, embed a static bitmap within the
gr2d structure to avoid the allocation and use the Linux bitmap API to
reduce code complexity.

Don't annotate the driver's .remove() function __exit. Even if built in
the driver can be unloaded via sysfs, so .remove() needs to stick around
after initialization. Also remove the explicit initialization of the
driver's .owner field to THIS_MODULE because that's now handled by the
driver core.

Furthermore make an error message more consistent with other subdrivers,
index the syncpts array for better readability, remove a gratuituous
newline and reorder some variable declarations to make the code easier
to read.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:09 +01:00
Thierry Reding d77563ff56 gpu: host1x: firewall: Refactor register check
The same code sequence is used in various places to validate a register
access in the command stream. This can be refactored into a separate
function.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:08 +01:00
Thierry Reding d7fbcf477a gpu: host1x: firewall: Rename cmdbuf_id -> cmdbuf
The value stored in this field is a pointer to a command buffer, not an
ID. Avoid some confusion by reflecting that in the field's name.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:08 +01:00
Thierry Reding 37857cd2c5 gpu: host1x: Fix alignment of function arguments
Arguments on subsequent lines should be aligned with the first argument.
This one occurrence went unnoticed during code review.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:08 +01:00
Thierry Reding 452e7f0cda gpu: host1x: Do not discard .remove()
The device can be unbound from the driver via sysfs, so regardless of
whether the driver is builtin or a module, its .remove() function needs
to stick around.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:07 +01:00
Thierry Reding 9eb9b220fc gpu: host1x: Cleanup includes
Most of the included files are either not required or already included
by some other header file.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:07 +01:00
Thierry Reding c88c363072 drm/tegra: Rename host1x_drm_context to tegra_drm_context
The structure represents a context associated with a particular process
that has opened the Tegra DRM device and requested a channel. This is a
very DRM-specific notion and has nothing to do with host1x. Rename the
structure to more clearly mark the boundaries between the two.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:06 +01:00
Thierry Reding 08943e6cbc drm/tegra: Rename host1x_drm_file to tegra_drm_file
This structure extends drm_file with Tegra DRM specific fields and has
nothing to do with host1x. Rename the structure to more clearly mark the
boundaries between host1x and Tegra DRM.

While at it, move the structure definition out of the header. It's never
used outside of the drm.c source file, so it can be defined within that.

Signed-off-by: Thierry Reding <treding@nvidia.com>
2013-10-31 09:20:06 +01:00