Introduce a wkup_m3_ipc driver to handle communication between the MPU
and Cortex M3 wkup_m3 present on am335x.
This driver is responsible for actually booting the wkup_m3_rproc and
also handling all IPC which is done using the IPC registers in the control
module, a mailbox, and a separate interrupt back from the wkup_m3. A small
API is exposed for executing specific power commands, which include
configuring for low power mode, request a transition to a low power mode,
and status info on a previous transition.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Now that nobody use the "priv" arg passed to can_fork/cancel_fork/fork we can
kill CGROUP_CANFORK_COUNT/SUBSYS_TAG/etc and cgrp_ss_priv[] in copy_process().
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Add the device tree bindings document for the TI Wakeup M3 IPC
device on AM33xx and AM43xx SoCs. These devices are used by the
TI wkup_m3_ipc driver, and contain the registers upon which the
IPC protocol to communicate with the Wakeup M3 processor is
implemented.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Due to a copy-paste error the the rk3368 cpuclk settings were acessing
rk3288-specific register offsets. This never caused problems till now,
as cpu frequency scaling in't used currently at all.
Reported-by: Xing Zheng <zhengxing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Because accounting resources for the root cgroup sometimes incurs
measureable overhead for workloads which don't care about cgroup and
often ends up calculating a number which is available elsewhere in a
slightly different form, cgroup is not in the business of providing
system-wide statistics. The pids controller which was introduced
recently was exposing "pids.current" at the root. This patch disable
accounting for root cgroup and removes the file from the root
directory.
While this is a userland visible behavior change, pids has been
available only in one version and was badly broken there, so I don't
think this will be noticeable. If it turns out to be a problem, we
can reinstate it for v1 hierarchies.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Aleksa Sarai <cyphar@cyphar.com>
Consider the following v2 hierarchy.
P0 (+memory) --- P1 (-memory) --- A
\- B
P0 has memory enabled in its subtree_control while P1 doesn't. If
both A and B contain processes, they would belong to the memory css of
P1. Now if memory is enabled on P1's subtree_control, memory csses
should be created on both A and B and A's processes should be moved to
the former and B's processes the latter. IOW, enabling controllers
can cause atomic migrations into different csses.
The core cgroup migration logic has been updated accordingly but the
controller migration methods haven't and still assume that all tasks
migrate to a single target css; furthermore, the methods were fed the
css in which subtree_control was updated which is the parent of the
target csses. pids controller depends on the migration methods to
move charges and this made the controller attribute charges to the
wrong csses often triggering the following warning by driving a
counter negative.
WARNING: CPU: 1 PID: 1 at kernel/cgroup_pids.c:97 pids_cancel.constprop.6+0x31/0x40()
Modules linked in:
CPU: 1 PID: 1 Comm: systemd Not tainted 4.4.0-rc1+ #29
...
ffffffff81f65382 ffff88007c043b90 ffffffff81551ffc 0000000000000000
ffff88007c043bc8 ffffffff810de202 ffff88007a752000 ffff88007a29ab00
ffff88007c043c80 ffff88007a1d8400 0000000000000001 ffff88007c043bd8
Call Trace:
[<ffffffff81551ffc>] dump_stack+0x4e/0x82
[<ffffffff810de202>] warn_slowpath_common+0x82/0xc0
[<ffffffff810de2fa>] warn_slowpath_null+0x1a/0x20
[<ffffffff8118e031>] pids_cancel.constprop.6+0x31/0x40
[<ffffffff8118e0fd>] pids_can_attach+0x6d/0xf0
[<ffffffff81188a4c>] cgroup_taskset_migrate+0x6c/0x330
[<ffffffff81188e05>] cgroup_migrate+0xf5/0x190
[<ffffffff81189016>] cgroup_attach_task+0x176/0x200
[<ffffffff8118949d>] __cgroup_procs_write+0x2ad/0x460
[<ffffffff81189684>] cgroup_procs_write+0x14/0x20
[<ffffffff811854e5>] cgroup_file_write+0x35/0x1c0
[<ffffffff812e26f1>] kernfs_fop_write+0x141/0x190
[<ffffffff81265f88>] __vfs_write+0x28/0xe0
[<ffffffff812666fc>] vfs_write+0xac/0x1a0
[<ffffffff81267019>] SyS_write+0x49/0xb0
[<ffffffff81bcef32>] entry_SYSCALL_64_fastpath+0x12/0x76
This patch fixes the bug by removing @css parameter from the three
migration methods, ->can_attach, ->cancel_attach() and ->attach() and
updating cgroup_taskset iteration helpers also return the destination
css in addition to the task being migrated. All controllers are
updated accordingly.
* Controllers which don't care whether there are one or multiple
target csses can be converted trivially. cpu, io, freezer, perf,
netclassid and netprio fall in this category.
* cpuset's current implementation assumes that there's single source
and destination and thus doesn't support v2 hierarchy already. The
only change made by this patchset is how that single destination css
is obtained.
* memory migration path already doesn't do anything on v2. How the
single destination css is obtained is updated and the prep stage of
mem_cgroup_can_attach() is reordered to accomodate the change.
* pids is the only controller which was affected by this bug. It now
correctly handles multi-destination migrations and no longer causes
counter underflow from incorrect accounting.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-and-tested-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
Cc: Aleksa Sarai <cyphar@cyphar.com>
If one or more tasks get moved into a frozen css, the frozen state is
cleared up from the destination css so that it can be reasserted once
the migrated tasks are frozen. freezer_attach() implements this in
two separate steps - clearing CGROUP_FROZEN on the target css while
processing each task and propagating the clearing upwards after the
task loop is done if necessary.
This patch merges the two steps. Propagation now takes place inside
the task loop. This simplifies the code and prepares it for the fix
of multi-destination migration.
Signed-off-by: Tejun Heo <tj@kernel.org>
Major changes:
ath10k
* support Manegement Frame Protection (MFP)
* add thermal throttling support for 10.4 firmware
* add support for pktlog in QCA99X0
* add debugfs file to enable Bluetooth coexistence feature
* use firmware's native mesh interface type instead of raw mode
In intel_prepare_plane_fb, if fb is backed by dma-buf, wait for exclusive
fence
v2: First commit
v3: Remove object_name_lock acquire
Move wait from intel_atomic_commit() to intel_prepare_plane_fb()
v4: Wait only on exclusive fences, interruptible with no timeout
v5: Style tweaks to more closely match rest of file
v6: Properly handle interrupted waits
v7: No change
v8: No change
Link: https://patchwork.kernel.org/patch/7704181/
Signed-off-by: Alex Goins <agoins@nvidia.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
If a buffer is backed by dmabuf, wait on its reservation object's exclusive
fence before flipping.
v2: First commit
v3: Remove object_name_lock acquire
v4: Move wait ahead of mark_page_flip_active
Use crtc->primary->fb to get GEM object instead of pending_flip_obj
use_mmio_flip() return true when exclusive fence is attached
Wait only on exclusive fences, interruptible with no timeout
v5: Move wait from do_mmio_flip to mmio_flip_work_func
Style tweaks to more closely match rest of file
v6: Change back to unintteruptible wait to match __i915_wait_request due to
inability to properly handle interrupted wait.
Warn on error code from waiting.
v7: No change
v8: Test for !reservation_object_signaled_rcu(test_all=FALSE) instead of
obj->base.dma_buf->resv->fence_excl
Link: https://patchwork.kernel.org/patch/7704181/
Signed-off-by: Alex Goins <agoins@nvidia.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
I've tested it on one device and it works fine, no clicks.
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
It works only for HVR-4400/HVR-5500.
For WinTV-HVR-930C-HD it fails with bad/no reception
for unknown reasons.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The current si2165_set_frontend() function actually works only for DVB-T.
Split it into two functions, preparing the code to support DVB-C.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Use si2165_write_reg_list() to do the DVB-T mode initialization altogether.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Use the first retired request on a new context to unpin
the old context. This ensures that the hw context remains
bound until it has been written back to by the GPU.
Now that the context is pinned until later in the request/context
lifecycle, it no longer needs to be pinned from context_queue to
retire_requests.
This fixes an issue with GuC submission where the GPU might not
have finished writing back the context before it is unpinned. This
results in a GPU hang.
v2: Moved the new pin to cover GuC submission (Alex Dai)
Moved the new unpin to request_retire to fix coverage leak
v3: Added switch to default context if freeing a still pinned
context just in case the hw was actually still using it
v4: Unwrapped context unpin to allow calling without a request
v5: Only create a switch to idle context if the ring doesn't
already have a request pending on it (Alex Dai)
Rename unsaved to dirty to avoid double negatives (Dave Gordon)
Changed _no_req postfix to __ prefix for consistency (Dave Gordon)
Split out per engine cleanup from context_free as it
was getting unwieldy
Corrected locking (Dave Gordon)
v6: Removed some bikeshedding (Mika Kuoppala)
Added explanation of the GuC hang that this fixes (Daniel Vetter)
v7: Removed extra per request pinning from ring reset code (Alex Dai)
Added forced ring unpin/clean in error case in context free (Alex Dai)
Signed-off-by: Nick Hoath <nicholas.hoath@intel.com>
Issue: VIZ-4277
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: David Gordon <david.s.gordon@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Alex Dai <yu.dai@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Alex Dai <yu.dai@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
For now, remove the spinlocks that protected the GuC's
statistics block and work queue; they are only accessed
by code that already holds the global struct_mutex, and
so are redundant (until the big struct_mutex rewrite!).
The specific problem that the spinlocks caused was that
if the work queue was full, the driver would try to
spinwait for one jiffy, but with interrupts disabled the
jiffy count would not advance, leading to a system hang.
The issue was found using test case igt/gem_close_race.
The new version will usleep() instead, still holding
the struct_mutex but without any spinlocks.
v4: Reorganize commit message (Dave Gordon)
v3: Remove unnecessary whitespace churn
v2: Clean up wq_lock too
v1: Clean up host2guc lock as well
Signed-off-by: Alex Dai <yu.dai@intel.com>
Reviewed-by: Dave Gordon <david.s.gordon@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1449104189-27591-1-git-send-email-yu.dai@intel.com
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
si2165_set_if_freq_shift() needs to call get_if_frequency() in order to do
the right shift. Add such logic inside the function, simplifying the logic
for the callers.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The TS config is fixed, so no need to write it for each tune.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Datasheet says they must be rewritten after reset.
But it only makes sense to write them when trying to tune afterwards.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
We don't have to use GFP_NOFS in context of ACL or XATTR actions, not
possible to loop through the allocator and it's safe to fail with
ENOMEM.
Signed-off-by: David Sterba <dsterba@suse.com>
We don't have to use GFP_NOFS to allocate workqueue structures, this is
done from mount context or potentially scrub start context, safe to fail
in both cases.
Signed-off-by: David Sterba <dsterba@suse.com>
We don't have to use GFP_NOFS in the ioctl handlers because there's no
risk of looping through the allocators back to the filesystem. This
patch covers only allocations that are directly in the ioctl handlers.
Signed-off-by: David Sterba <dsterba@suse.com>
It is common the need of writing a table of values. Add a function to provide a
helper to address such case. This will allow further code cleanups.
Signed-off-by: Matthias Schwarzott <zzam@gentoo.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
There's only one caller and single value, we can propagate it down to
the callee and remove the unused parameter.
Signed-off-by: David Sterba <dsterba@suse.com>
There's no need to stop and restart FBC, which is quite expensive as
we have to revalidate the CRTC state. After flushing a drawing
operation we know the CRTC state hasn't changed, so a nuke
(recompress) should be fine.
v2: Make it simpler (Chris).
v3: Rewrite the patch again due to patch order changes.
v4: Rewrite commit message (Chris).
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
Add support for Intel DS4 depth camera in uvc driver.
This includes adding new uvc GUIDs for the new pixel formats,
adding new V4L pixel format definition to user api headers,
and updating the uvc driver GUID-to-4cc tables with the new formats.
Change-Id: If240d95a7d4edc8dcc3e02d58cd8267a6bbf6fcb
Tested-by: Greenberg, Aviv D <aviv.d.greenberg@intel.com>
Signed-off-by: Aviv Greenberg <aviv.d.greenberg@intel.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
When running Cinnamon I see way too many pairs of these messages: many
per second. Get rid of them as they're just telling us FBC is working
as expected. We already have the messages for enable/disable, so we
don't really need messages for activation/deactivation.
v2: Rebase after changing the patch order.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
Directly call intel_fbc_calculate_cfb_size() in the only place that
actually needs it, and use the proper check before removing the stolen
node. IMHO, this change makes our code easier to understand.
v2: Use drm_mm_node_allocated() (Chris).
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
This was already on my TODO list, and was requested both by Chris and
Ville, for different reasons. The advantages are avoiding a frequent
malloc/free pair, and the locality of having the work structure
embedded in dev_priv. The maximum used memory is also smaller since
previously we could have multiple allocated intel_fbc_work structs at
the same time, and now we'll always have a single one - the one
embedded on dev_priv. Of course, we're now using a little more memory
on the cases where there's nothing scheduled.
The biggest challenge here is to keep everything synchronized the way
it was before.
Currently, when we try to activate FBC, we allocate a new
intel_fbc_work structure. Then later when we conclude we must delay
the FBC activation a little more, we allocate a new intel_fbc_work
struct, and then adjust dev_priv->fbc.fbc_work to point to the new
struct. So when the old work runs - at intel_fbc_work_fn() - it will
check that dev_priv->fbc.fbc_work points to something else, so it does
nothing. Everything is also protected by fbc.lock.
Just cancelling the old delayed work doesn't work because we might
just cancel it after the work function already started to run, but
while it is still waiting to grab fbc.lock. That's why we use the
"dev_priv->fbc.fbc_work == work" check described in the paragraph
above.
So now that we have a single work struct we have to introduce a new
way to synchronize everything. So we're making the work function a
normal work instead of a delayed work, and it will be responsible for
sleeping the appropriate amount of time itself. This way, after it
wakes up it can grab the lock, ask "were we delayed or cancelled?" and
then go back to sleep, enable FBC or give up.
v2:
- Spelling fixes.
- Rebase after changing the patch order.
- Fix ms/jiffies confusion.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> (v1)
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
This moves the pre-gen4 check from update() to enable(). The HAS_DDI
in the original code is not needed since only gen 2/3 have the plane
swapping code.
v2: Rebase.
v3: Extract fbc_on_plane_a_only() (Chris).
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
One of the problems with the current code is that it frees the CFB and
releases its drm_mm node as soon as we flip FBC's enable bit. This is
bad because after we disable FBC the hardware may still use the CFB
for the rest of the frame, so in theory we should only release the
drm_mm node one frame after we disable FBC. Otherwise, a stolen memory
allocation done right after an FBC disable may result in either
corrupted memory for the new owner of that memory region or corrupted
screen/underruns in case the new owner changes it while the hardware
is still reading it. This case is not exactly easy to reproduce since
we currently don't do a lot of stolen memory allocations, but I see
patches on the mailing list trying to expose stolen memory to user
space, so races will be possible.
I thought about three different approaches to solve this, and they all
have downsides.
The first approach would be to simply use multiple drm_mm nodes and
freeing the unused ones only after a frame has passed. The problem
with this approach is that since stolen memory is rather small,
there's a risk we just won't be able to allocate a new CFB from stolen
if the previous one was not freed yet. This could happen in case we
quickly disable FBC from pipe A and decide to enable it on pipe B, or
just if we change pipe A's fb stride while FBC is enabled.
The second approach would be similar to the first one, but maintaining
a single drm_mm node and keeping track of when it can be reused. This
would remove the disadvantage of not having enough space for two
nodes, but would create the new problem where we may not be able to
enable FBC at the point intel_fbc_update() is called, so we would have
to add more code to retry updating FBC after the time has passed. And
that can quickly get too complex since we can get invalidate, flush,
disable and other calls in the middle of the wait.
Both solutions above - and also the current code - have the problem
that we unnecessarily free+realloc FBC during invalidate+flush
operations even if the CFB size doesn't change.
The third option would be to move the allocation/deallocation to
enable/disable. This makes sure that the pipe is always disabled when
we allocate/deallocate the CFB, so there's no risk that the FBC
hardware may read or write to the memory right after it is freed from
drm_mm. The downside is that it is possible for user space to change
the buffer stride without triggering a disable/enable - only
deactivate/activate -, so we'll have to handle this case somehow - see
igt's kms_frontbuffer_tracking test, fbc-stridechange subtest. It
could be possible to implement a way to free+alloc the CFB during said
stride change, but it would involve a lot of book-keeping - exactly as
mentioned above - just for on case, so for now I'll keep it simple and
just deactivate FBC. Besides, we may not even need to disable FBC
since we do CFB over-allocation.
Note from Chris: "Starting a fullscreen client that covers a single
monitor in a multi-monitor setup will trigger a change in stride on
one of the CRTCs (the monitors will be flipped independently).". It
shouldn't be a huge problem if we lose FBC on multi-monitor setups
since these setups already have problems reaching deep PC states
anyway.
v2: Rebase after changing the patch order.
v3:
- Remove references to the stride change case being "uncommon" and
paste Chris' example.
- Rebase after a change in a previous patch.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
The goal is to call FBC enable/disable only once per modeset, while
activate/deactivate/update will be called multiple times.
The enable() function will be responsible for deciding if a CRTC will
have FBC on it and then it will "lock" FBC on this CRTC: it won't be
possible to change FBC's CRTC until disable(). With this, all checks
and resource acquisition that only need to be done once per modeset
can be moved from update() to enable(). And then the update(),
activate() and deactivate() code will also get simpler since they
won't need to worry about the CRTC being changed.
The disable() function will do the reverse operation of enable(). One
of its features is that it should only be called while the pipe is
already off. This guarantees that FBC is stopped and nothing is
using the CFB.
With this, the activate() and deactivate() functions just start and
temporarily stop FBC. They are the ones touching the hardware enable
bit, so HW state reflects dev_priv->crtc.active.
The last function remaining is update(). A lot of times I thought
about renaming update() to activate() or try_to_activate() since it's
called when we want to activate FBC. The thing is that update() may
not only decide to activate FBC, but also deactivate or keep it on the
same state, so I'll leave this name for now.
Moving code to enable() and disable() will also help in case we decide
to move FBC to pipe_config or something else later.
The current patch only puts the very basic code on enable() and
disable(). The next commits will take care of moving more stuff from
update() to the new functions.
v2:
- Rebase.
- Improve commit message (Chris).
v3: Rebase after changing the patch order.
v4: Rebase again after upstream changes.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
The long term goal is to have enable/disable as the higher level
functions and activate/deactivate as the lower level functions, just
like we do for PSR and for the CRTC. This way, we'll run enable and
disable once per modeset, while update, activate and deactivate will
be run many times. With this, we can move the checks and code that
need to run only once per modeset to enable(), making the code simpler
and possibly a little faster.
This patch is just the first step on the conversion: it starts by
converting the current low level functions from enable/disable to
activate/deactivate. This patch by itself has no benefits other than
making review and rebase easier. Please see the next patches for more
details on the conversion.
v2:
- Rebase.
- Improve commit message (Chris).
v3: Rebase after changing the patch order.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
There's no need to reevaluate the status of every single crtc when a
single crtc changes its state.
With this, we're cutting the case where due to a change in pipe B,
intel_fbc_update() is called, then intel_fbc_find_crtc() concludes FBC
should be enabled on pipe A, then it completely rechecks the state of
pipe A only to conclude FBC should remain enabled on pipe A. If any
change on pipe A triggers a need to recompute whether FBC is valid on
pipe A, then at some point someone is going to call
intel_fbc_update(PIPE_A).
The addition of intel_fbc_deactivate() is necessary so we keep track
of the previously selected CRTC when we do invalidate/flush. We're
also going to continue the enable/disable/activate/deactivate concept
in the next patches.
v2: Rebase.
v3: Rebase after changing the patch order.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
The cx2341x_handler_ops structures are never modified, so declare them as
const.
Done with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The snd_tea575x_ops structures are never modified, so declare them as
const.
Done with the help of Coccinelle.
Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Add the new match_reduced_fps argument to v4l2_match_dv_timings().
Depending on the situation you may or may not desire to match the
reduced_fps flag. Typically only HDMI transmitters will need to
check for this flag.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
The funcions just wrap the clear_extent_bit API and generate function
calls. This increases stack consumption and may negatively affect
performance due to icache misses. We can simply make the helpers static
inline and keep the type checking and API untouched. The code slightly
decreases:
text data bss dec hex filename
938667 43670 23144 1005481 f57a9 fs/btrfs/btrfs.ko.before
939651 43670 23144 1006465 f5b81 fs/btrfs/btrfs.ko.after
Signed-off-by: David Sterba <dsterba@suse.com>
This thing where we need to get the crtc either from the work
structure or the fbc structure itself is confusing and unnecessary.
Set fbc.crtc right when scheduling the enable work so we can always
use it.
The problem is not what gets passed and how to retrieve it. The
problem is that when we're in the other parts of the code we always
have to keep in mind that if FBC is already enabled we have to get the
CRTC from place A, if FBC is scheduled we have to get the CRTC from
place B, and if it's disabled there's no CRTC. Having a single place
to retrieve the CRTC from allows us to treat the "is enabled" and "is
scheduled" cases as the same case, reducing the mistake surface. I
guess I should add this to the commit message.
Besides the immediate advantages, this is also going to make one of
the next commits much simpler. And even later, when we introduce
enable/disable + activate/deactivate, this will be even simpler as
we'll set the CRTC at enable time. So all the
activate/deactivate/update code can just look at the single CRTC
variable regardless of the current state.
v2: Improve commit message (Chris).
v3: Rebase after changing the patch order.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
In function find_compression_threshold() we try to over-allocate CFB
space in order to reduce reallocations and fragmentation, and we're
not considering that at the CFB size check. Consider it.
There is also a longer-term plan to kill
dev_priv->fbc.uncompressed_size, but this will come later.
v2: Use drm_mm_node_allocated() (Chris).
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/
The funcions just wrap the set_extent_bit API and generate function
calls. This increases stack consumption and may negatively affect
performance due to icache misses. We can simply make the helpers static
inline and keep the type checking and API untouched. The code slightly
increases:
text data bss dec hex filename
938427 43670 23144 1005241 f56b9 fs/btrfs/btrfs.ko.before
938667 43670 23144 1005481 f57a9 fs/btrfs/btrfs.ko
Signed-off-by: David Sterba <dsterba@suse.com>
