GitHub/moto-9609/android_kernel_motorola_exynos9610.git
7 years agoALSA: x86: fix error return code in hdmi_lpe_audio_probe()
Gustavo A. R. Silva [Fri, 30 Jun 2017 20:18:41 +0000 (15:18 -0500)]
ALSA: x86: fix error return code in hdmi_lpe_audio_probe()

platform_get_irq() returns an error code, but the intel_hdmi_audio
driver ignores it and always returns -ENODEV. This is not correct,
and prevents -EPROBE_DEFER from being propagated properly. Also,
notice that platform_get_irq() no longer returns 0 on error.

Print error message and propagate the return value of platform_get_irq
on failure.

Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda/realtek - New codecs support for ALC215/ALC285/ALC289
Kailang Yang [Fri, 30 Jun 2017 08:00:48 +0000 (16:00 +0800)]
ALSA: hda/realtek - New codecs support for ALC215/ALC285/ALC289

Add new codecs support for ALC215 ALC285 ALC289.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda/realtek - Remove ALC285 device ID
Kailang Yang [Fri, 30 Jun 2017 07:22:57 +0000 (15:22 +0800)]
ALSA: hda/realtek - Remove ALC285 device ID

0x0285 Device ID was not used.
It just assigned for alias of ALC293 as backup.
So, remove it first.
Because our new codec will use this device ID.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda - Fix doubly initialization of i915 component
Takashi Iwai [Thu, 29 Jun 2017 14:18:12 +0000 (16:18 +0200)]
ALSA: hda - Fix doubly initialization of i915 component

In the commit fcc88d91cd36 ("ALSA: hda - Bind with i915 component
before codec binding"), the binding with i915 audio component is moved
to be performed always at probing the controller.  This fixed the
potential problems on IVB, but now it brought another issue on HSW and
BDW.  These two platforms give two individual HD-audio controllers,
one for the analog codec on PCH and another for HDMI over gfx.  Since
I decided to take a lazy path to check only AZX_DRIVER_PCH type in the
commit above, now both controllers try to bind with i915, and you see
a kernel WARNING.

This patch tries to address it again properly.  Now a new DCAPS bit,
AZX_DCAPS_I915_COMPONENT, is introduced for indicating the binding
with i915 component in addition to the existing I915_POWERWELL bit
flag.  Each PCI entry has to give this new flag if it requires the
binding with i915 component.  For HSW/BDW PCH (i.e. the ones defined
by AZX_DCAPS_INTEL_PCH) doesn't contain AZX_DCAPS_I915_COMPONENT bit
while others have it.

While we're at it, add parentheses around the bit flag check for
avoiding possible compiler warnings, too.

The bug was spotted by Intel CI tests.

Fixes: fcc88d91cd36 ("ALSA: hda - Bind with i915 component before codec binding")
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=196219
Reported-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda: constify attribute_group structures.
Arvind Yadav [Thu, 29 Jun 2017 10:37:01 +0000 (16:07 +0530)]
ALSA: hda: constify attribute_group structures.

attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/device.h> work with const
attribute_group. So mark the non-const structs as const.

File size before:
   text    data     bss     dec     hex filename
    995     608       0    1603     643 sound/pci/hda/hda_sysfs.o

File size After adding 'const':
   text    data     bss     dec     hex filename
   1035     544       0    1579     62b sound/pci/hda/hda_sysfs.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: constify attribute_group structures.
Arvind Yadav [Thu, 29 Jun 2017 10:32:56 +0000 (16:02 +0530)]
ALSA: pcm: constify attribute_group structures.

attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/device.h> work with const
attribute_group. So mark the non-const structs as const.

File size before:
   text    data     bss     dec     hex filename
   9781     240       8   10029    272d sound/core/pcm.o

File size After adding 'const':
   text    data     bss     dec     hex filename
   9813     176       8    9997    270d sound/core/pcm.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda/realtek - Support Dell headset mode for ALC3271
Kailang Yang [Thu, 29 Jun 2017 07:21:27 +0000 (15:21 +0800)]
ALSA: hda/realtek - Support Dell headset mode for ALC3271

Add DELL4_MIC_NO_PRESENCE model.
Add the pin configuration value of this machine into the pin_quirk
table to make DELL4_MIC_NO_PRESENCE apply to this machine.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoMerge branch 'topic/hda-fix' into for-next
Takashi Iwai [Wed, 28 Jun 2017 14:42:50 +0000 (16:42 +0200)]
Merge branch 'topic/hda-fix' into for-next

7 years agoALSA: hda - Minor code refactoring for Intel HDMI codec parsers
Takashi Iwai [Wed, 28 Jun 2017 12:18:29 +0000 (14:18 +0200)]
ALSA: hda - Minor code refactoring for Intel HDMI codec parsers

No functional change, just a slight reduction of lines.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda - Bind with i915 component before codec binding
Takashi Iwai [Wed, 28 Jun 2017 10:54:53 +0000 (12:54 +0200)]
ALSA: hda - Bind with i915 component before codec binding

We used a on-demand i915 component binding for IvyBridge and
SandyBridge HDMI codecs, but it has a potential problem of the nested
module loading.  For avoiding that situation, assure the i915 binding
happening at the controller driver level for PCH controller devices,
where the initialization is performed in a detached work, instead of
calling from the codec driver probe.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda - Skip card registration when no codec is found
Takashi Iwai [Wed, 28 Jun 2017 10:45:34 +0000 (12:45 +0200)]
ALSA: hda - Skip card registration when no codec is found

It's nonsense to register a card object when no codec is bound on it,
as we don't support the deferred codec binding.  Instead of
registering an empty card object, just skip the registration by
returning an error from azx_codec_configure().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda - Fix endless loop of codec configure
Takashi Iwai [Wed, 28 Jun 2017 10:02:02 +0000 (12:02 +0200)]
ALSA: hda - Fix endless loop of codec configure

azx_codec_configure() loops over the codecs found on the given
controller via a linked list.  The code used to work in the past, but
in the current version, this may lead to an endless loop when a codec
binding returns an error.

The culprit is that the snd_hda_codec_configure() unregisters the
device upon error, and this eventually deletes the given codec object
from the bus.  Since the list is initialized via list_del_init(), the
next object points to the same device itself.  This behavior change
was introduced at splitting the HD-audio code code, and forgotten to
adapt it here.

For fixing this bug, just use a *_safe() version of list iteration.

Fixes: d068ebc25e6e ("ALSA: hda - Move some codes up to hdac_bus struct")
Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: Fix forgotten dependency fix for tristate OSS sequencer kconfig
Takashi Iwai [Wed, 28 Jun 2017 06:13:41 +0000 (08:13 +0200)]
ALSA: Fix forgotten dependency fix for tristate OSS sequencer kconfig

In the commit 3d774d5ef066 ("ALSA: seq: Allow the tristate build of
OSS emulation") we changed CONFIG_SND_SEQUENCER_OSS to tristate, but a
couple of places were forgotten, namely, opl3 and emux Makefile.
These contain the line like
  snd-opl3-synth-$(CONFIG_SND_SEQUENCER_OSS) += opl3_oss.o
and this doesn't work any longer as expected because snd-opl3-synth
can be built-in while CONFIG_SND_SEQUENCER_OSS=m.

This patch fixes these places to build properly for the new kconfig
dependency.  In the end, we had to use ifneq() to satisfy the
requirement.  It's a bit ugly, but lesser evil.

Fixes: 3d774d5ef066 ("ALSA: seq: Allow the tristate build of OSS emulation")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda - set input_path bitmap to zero after moving it to new place
Hui Wang [Wed, 28 Jun 2017 00:59:16 +0000 (08:59 +0800)]
ALSA: hda - set input_path bitmap to zero after moving it to new place

Recently we met a problem, the codec has valid adcs and input pins,
and they can form valid input paths, but the driver does not build
valid controls for them like "Mic boost", "Capture Volume" and
"Capture Switch".

Through debugging, I found the driver needs to shrink the invalid
adcs and input paths for this machine, so it will move the whole
column bitmap value to the previous column, after moving it, the
driver forgets to set the original column bitmap value to zero, as a
result, the driver will invalidate the path whose index value is the
original colume bitmap value. After executing this function, all
valid input paths are invalidated by a mistake, there are no any
valid input paths, so the driver won't build controls for them.

Fixes: 3a65bcdc577a ("ALSA: hda - Fix inconsistent input_paths after ADC reduction")
Cc: <stable@vger.kernel.org>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Disable only control mmap for explicit appl_ptr sync
Takashi Iwai [Tue, 27 Jun 2017 09:54:37 +0000 (11:54 +0200)]
ALSA: pcm: Disable only control mmap for explicit appl_ptr sync

Now that user-space (typically alsa-lib) can specify which protocol
version it supports, we can optimize the kernel code depending on the
reported protocol version.

In this patch, we change the previous hack for enforcing the appl_ptr
sync by disabling status/control mmap.  Instead of forcibly disabling
both mmaps, we disable only the control mmap when user-space declares
the supported protocol version new enough.  For older user-space,
still both PCM status and control mmaps are disabled when requested by
the driver due to the compatibility reason.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Add an ioctl to specify the supported protocol version
Takashi Iwai [Mon, 19 Jun 2017 21:11:54 +0000 (23:11 +0200)]
ALSA: pcm: Add an ioctl to specify the supported protocol version

We have an ioctl to inform the PCM protocol version the running kernel
supports, but there is no way to know which protocol version the
user-space can understand.  This lack of information caused headaches
in the past when we tried to extend the ABI.  For example, because we
couldn't guarantee the validity of the reserved bytes, we had to
introduce a new ioctl SNDRV_PCM_IOCTL_STATUS_EXT for assigning a few
new fields in the formerly reserved bits.  If we could know that it's
a new alsa-lib, we could assume the availability of the new fields,
thus we could have reused the existing SNDRV_PCM_IOCTL_STATUS.

In order to improve the ABI extensibility, this patch adds a new ioctl
for user-space to inform its supporting protocol version to the
kernel.  By reporting the supported protocol from user-space, the
kernel can judge which feature should be provided and which not.

With the addition of the new ioctl, the PCM protocol version is bumped
to 2.0.14, too.  User-space checks the kernel protocol version via
SNDRV_PCM_INFO_PVERSION, then it sets the supported version back via
SNDRV_PCM_INFO_USER_PVERSION.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda/realtek - There is no loopback mixer in the ALC234/274/294
Hui Wang [Mon, 26 Jun 2017 04:30:32 +0000 (12:30 +0800)]
ALSA: hda/realtek - There is no loopback mixer in the ALC234/274/294

We have a Lenovo machine with the codec ALC294 on it, without the
patch, the Node 0x0b is regarded as the loopback mixer, but the Node
0x0b in this codec is "Vendor Defined Widget" instead of the audio
mixer, please see the log below:

Node 0x0b [Vendor Defined Widget] wcaps 0xf00000: Mono
  Control: name="Beep Playback Volume", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=4, ofs=0
  Control: name="Beep Playback Switch", index=0, device=0
    ControlAmp: chs=3, dir=In, idx=4, ofs=0

And I have consulted with Realtek, so far the ALC234/274/294 all don't
have loopback mixer.

Cc: Kailang Yang <kailang@realtek.com>
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Add the explicit appl_ptr sync support
Takashi Iwai [Mon, 19 Jun 2017 20:39:18 +0000 (22:39 +0200)]
ALSA: pcm: Add the explicit appl_ptr sync support

Currently x86 platforms use the PCM status/control mmaps for
transferring the PCM status and appl_ptr between kernel and
user-spaces.  The mmap is a most efficient way of communication, but
it has a drawback per its nature, namely, it can't notify the change
explicitly to kernel.

The lack of appl_ptr update notification is a problem on a few
existing drivers, but it's mostly a small issue and negligible.
However, a new type of driver that uses DSP for a deep buffer
management requires the exact position of appl_ptr for calculating the
buffer prefetch size, and the asynchronous appl_ptr update between
kernel and user-spaces becomes a significant problem for it.

How can we enforce user-space to report the appl_ptr update?  The way
is relatively simple.  Just by disabling the PCM control mmap, the
user-space is supposed to fall back to the mode using SYNC_PTR ioctl,
and the kernel gets control over that.  This fallback mode is used in
all non-x86 platforms as default, and also in the 32bit compatible
model on all platforms including x86.  It's been implemented already
over a decade, so we can say it's fairly safe and stably working.

With the help of the knowledge above, this patch introduces a new PCM
info flag SNDRV_PCM_INFO_SYNC_APPLPTR for achieving the appl_ptr sync
from user-space.  When a driver sets this flag at open, the PCM status
/ control mmap is disabled, which effectively switches to SYNC_PTR
mode in user-space side.

In this version, both PCM status and control mmaps are disabled
although only the latter, control mmap, is the target.  It's because
the current alsa-lib implementation supposes that both status and
control mmaps are always coupled, thus it handles a fatal error when
only one of them fails.

Of course, the disablement of the status/control mmaps may bring a
slight performance overhead.  Thus, as of now, this should be used
only for the dedicated devices that deserves.

Note that the disablement of mmap is a sort of workaround.  In the
later patch, we'll introduce the way to identify the protocol version
alsa-lib supports, and keep mmap working while the sync_ptr is
performed together.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda/realtek - Add default procedure for suspend and resume state
Kailang Yang [Wed, 21 Jun 2017 06:50:54 +0000 (14:50 +0800)]
ALSA: hda/realtek - Add default procedure for suspend and resume state

Except ALC269.
This will reduce pop noise from headset or headphone.
If codec enter to power save state, when plug headset or headphone....
It has a chance to cut off power by system.
Our new codec use this procedure will be more stable during suspend
and resume state.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda/realtek - Support headset mode for ALC234/ALC274/ALC294
Kailang Yang [Tue, 20 Jun 2017 08:33:50 +0000 (16:33 +0800)]
ALSA: hda/realtek - Support headset mode for ALC234/ALC274/ALC294

This patch will enable headset mode for ALC234/ALC274/ALC294 platform.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Fix possible inconsistent appl_ptr update via mmap
Takashi Iwai [Fri, 16 Jun 2017 20:29:55 +0000 (22:29 +0200)]
ALSA: pcm: Fix possible inconsistent appl_ptr update via mmap

The ALSA PCM core refers to the appl_ptr value stored on the mmapped
page that is shared between kernel and user-space.  Although the
reference is performed in the PCM stream lock, it doesn't guarantee
the atomic access when the value gets updated concurrently from the
user-space on another CPU.

In most of codes, this is no big problem, but still there are a few
places that may result in slight inconsistencies because they access
runtime->control->appl_ptr multiple times; that is, the second read
might be a different value from the first value.  It can be even
backward or jumping, as we have no control for it.  Hence, the
calculation may give an unexpected value.  Luckily, there is no
security vulnerability by that, as far as I've checked.  But still we
should address it.

This patch tries to reduce such possible cases.  The fix is simple --
we just read once, store it to a local variable and use it for the
rest calculations.  The READ_ONCE() macro is used for it in order to
avoid the ill-effect by possible compiler optimizations.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda: Fix potential race at unregistration and unsol events
Takashi Iwai [Mon, 19 Jun 2017 15:49:48 +0000 (17:49 +0200)]
ALSA: hda: Fix potential race at unregistration and unsol events

When the codec device is unregistered / freed, it may release the
resource while being used in an unsolicited event like the jack
detection work.  This leads to use-after-free.

The fix here is to unregister the device at first, i.e. removing the
codec from the list, then flushing the pending works to assure that
all unsol events are gone.  After this point, we're free from
accessing the codec via unsol events, thus can release the resources
gracefully.

The issue was spotted originally by Intel CI, but it couldn't be
reproduced reliably by its nature.  So let's hope this fix really
addresses the whole issues.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=196045
Reported-by: Martin Peres <martin.peres@free.fr>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda - Add AZX_DRIVER_SKL for simplification
Takashi Iwai [Wed, 14 Jun 2017 05:26:00 +0000 (07:26 +0200)]
ALSA: hda - Add AZX_DRIVER_SKL for simplification

We checked the quirks specific to the recent Intel chips by checking
the PCI IDs manually, but it's becoming messy with lots of IS_SKL()
and other macros, as the amount accumulated.

For simplification, here the new AZX_DRIVER_SKL type is introduced,
and check chip->driver_type instead of the manual PCI ID.  The short
name for this is still "HDA Intel PCH", so that it doesn't break the
existing user-space unnecessarily.

Suggested-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoMerge branch 'for-linus' into for-next
Takashi Iwai [Tue, 20 Jun 2017 05:53:07 +0000 (07:53 +0200)]
Merge branch 'for-linus' into for-next

7 years agoALSA: hda - Apply quirks to Broxton-T, too
Takashi Iwai [Wed, 14 Jun 2017 05:37:14 +0000 (07:37 +0200)]
ALSA: hda - Apply quirks to Broxton-T, too

Broxton-T was a forgotten child and we didn't apply the quirks for
Skylake+ properly.  Meanwhile, a quirk for reducing the DMA latency
seems specific to the early Broxton model, so we leave as is.

Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: line6: remove unnecessary initialization to PODHD500X
Hans P. Möller Ebner [Fri, 16 Jun 2017 18:14:17 +0000 (14:14 -0400)]
ALSA: line6: remove unnecessary initialization to PODHD500X

Remove Initialization from POD HD500X because it's not needed.
Every time the device is connected dmesg gives the following output:
"receive length failed (error -11)".
To solve this problem, another flags is introduced
(LINE6_CAP_CONTROL_INFO) and it is only used for PODX3 in: sysfs
entries, call podhd_startup_finalize(pod) and disconnection.
With this patch the error disappear.

Signed-off-by: Hans P. Moller <hmoller@uc.cl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: line6: add support for POD HD500X
Hans P. Möller Ebner [Fri, 16 Jun 2017 18:14:16 +0000 (14:14 -0400)]
ALSA: line6: add support for POD HD500X

Add support for the Line6 POD HD500X multi effect processor for
playback and capture (in/out audio) through USB.

Signed-off-by: Hans P. Moller <hmoller@uc.cl>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: firewire-lib: Fix stall of process context at packet error
Takashi Sakamoto [Sun, 11 Jun 2017 07:08:21 +0000 (16:08 +0900)]
ALSA: firewire-lib: Fix stall of process context at packet error

At Linux v3.5, packet processing can be done in process context of ALSA
PCM application as well as software IRQ context for OHCI 1394. Below is
an example of the callgraph (some calls are omitted).

ioctl(2) with e.g. HWSYNC
(sound/core/pcm_native.c)
->snd_pcm_common_ioctl1()
  ->snd_pcm_hwsync()
    ->snd_pcm_stream_lock_irq
    (sound/core/pcm_lib.c)
    ->snd_pcm_update_hw_ptr()
      ->snd_pcm_udpate_hw_ptr0()
        ->struct snd_pcm_ops.pointer()
        (sound/firewire/*)
        = Each handler on drivers in ALSA firewire stack
          (sound/firewire/amdtp-stream.c)
          ->amdtp_stream_pcm_pointer()
            (drivers/firewire/core-iso.c)
            ->fw_iso_context_flush_completions()
              ->struct fw_card_driver.flush_iso_completion()
              (drivers/firewire/ohci.c)
              = flush_iso_completions()
                ->struct fw_iso_context.callback.sc
                (sound/firewire/amdtp-stream.c)
                = in_stream_callback() or out_stream_callback()
                  ->...
    ->snd_pcm_stream_unlock_irq

When packet queueing error occurs or detecting invalid packets in
'in_stream_callback()' or 'out_stream_callback()', 'snd_pcm_stop_xrun()'
is called on local CPU with disabled IRQ.

(sound/firewire/amdtp-stream.c)
in_stream_callback() or out_stream_callback()
->amdtp_stream_pcm_abort()
  ->snd_pcm_stop_xrun()
    ->snd_pcm_stream_lock_irqsave()
    ->snd_pcm_stop()
    ->snd_pcm_stream_unlock_irqrestore()

The process is stalled on the CPU due to attempt to acquire recursive lock.

[  562.630853] INFO: rcu_sched detected stalls on CPUs/tasks:
[  562.630861]      2-...: (1 GPs behind) idle=37d/140000000000000/0 softirq=38323/38323 fqs=7140
[  562.630862]      (detected by 3, t=15002 jiffies, g=21036, c=21035, q=5933)
[  562.630866] Task dump for CPU 2:
[  562.630867] alsa-source-OXF R  running task        0  6619      1 0x00000008
[  562.630870] Call Trace:
[  562.630876]  ? vt_console_print+0x79/0x3e0
[  562.630880]  ? msg_print_text+0x9d/0x100
[  562.630883]  ? up+0x32/0x50
[  562.630885]  ? irq_work_queue+0x8d/0xa0
[  562.630886]  ? console_unlock+0x2b6/0x4b0
[  562.630888]  ? vprintk_emit+0x312/0x4a0
[  562.630892]  ? dev_vprintk_emit+0xbf/0x230
[  562.630895]  ? do_sys_poll+0x37a/0x550
[  562.630897]  ? dev_printk_emit+0x4e/0x70
[  562.630900]  ? __dev_printk+0x3c/0x80
[  562.630903]  ? _raw_spin_lock+0x20/0x30
[  562.630909]  ? snd_pcm_stream_lock+0x31/0x50 [snd_pcm]
[  562.630914]  ? _snd_pcm_stream_lock_irqsave+0x2e/0x40 [snd_pcm]
[  562.630918]  ? snd_pcm_stop_xrun+0x16/0x70 [snd_pcm]
[  562.630922]  ? in_stream_callback+0x3e6/0x450 [snd_firewire_lib]
[  562.630925]  ? handle_ir_packet_per_buffer+0x8e/0x1a0 [firewire_ohci]
[  562.630928]  ? ohci_flush_iso_completions+0xa3/0x130 [firewire_ohci]
[  562.630932]  ? fw_iso_context_flush_completions+0x15/0x20 [firewire_core]
[  562.630935]  ? amdtp_stream_pcm_pointer+0x2d/0x40 [snd_firewire_lib]
[  562.630938]  ? pcm_capture_pointer+0x19/0x20 [snd_oxfw]
[  562.630943]  ? snd_pcm_update_hw_ptr0+0x47/0x3d0 [snd_pcm]
[  562.630945]  ? poll_select_copy_remaining+0x150/0x150
[  562.630947]  ? poll_select_copy_remaining+0x150/0x150
[  562.630952]  ? snd_pcm_update_hw_ptr+0x10/0x20 [snd_pcm]
[  562.630956]  ? snd_pcm_hwsync+0x45/0xb0 [snd_pcm]
[  562.630960]  ? snd_pcm_common_ioctl1+0x1ff/0xc90 [snd_pcm]
[  562.630962]  ? futex_wake+0x90/0x170
[  562.630966]  ? snd_pcm_capture_ioctl1+0x136/0x260 [snd_pcm]
[  562.630970]  ? snd_pcm_capture_ioctl+0x27/0x40 [snd_pcm]
[  562.630972]  ? do_vfs_ioctl+0xa3/0x610
[  562.630974]  ? vfs_read+0x11b/0x130
[  562.630976]  ? SyS_ioctl+0x79/0x90
[  562.630978]  ? entry_SYSCALL_64_fastpath+0x1e/0xad

This commit fixes the above bug. This assumes two cases:
1. Any error is detected in software IRQ context of OHCI 1394 context.
In this case, PCM substream should be aborted in packet handler. On the
other hand, it should not be done in any process context. TO distinguish
these two context, use 'in_interrupt()' macro.
2. Any error is detect in process context of ALSA PCM application.
In this case, PCM substream should not be aborted in packet handler
because PCM substream lock is acquired. The task to abort PCM substream
should be done in ALSA PCM core. For this purpose, SNDRV_PCM_POS_XRUN is
returned at 'struct snd_pcm_ops.pointer()'.

Suggested-by: Clemens Ladisch <clemens@ladisch.de>
Fixes: e9148dddc3c7("ALSA: firewire-lib: flush completed packets when reading PCM position")
Cc: <stable@vger.kernel.org> # 4.9+
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: core: Follow standard EXPORT_SYMBOL() declarations
Takashi Iwai [Fri, 16 Jun 2017 14:16:33 +0000 (16:16 +0200)]
ALSA: core: Follow standard EXPORT_SYMBOL() declarations

Just a tidy up to follow the standard EXPORT_SYMBOL*() declarations
in order to improve grep-ability.

- Move EXPORT_SYMBOL*() to the position right after its definition
- Remove superfluous blank line before EXPORT_SYMBOL*() lines

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: timer: Follow standard EXPORT_SYMBOL() declarations
Takashi Iwai [Fri, 16 Jun 2017 14:16:05 +0000 (16:16 +0200)]
ALSA: timer: Follow standard EXPORT_SYMBOL() declarations

Just a tidy up to follow the standard EXPORT_SYMBOL*() declarations
in order to improve grep-ability.

- Move EXPORT_SYMBOL*() to the position right after its definition

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: seq: Follow standard EXPORT_SYMBOL() declarations
Takashi Iwai [Fri, 16 Jun 2017 14:15:24 +0000 (16:15 +0200)]
ALSA: seq: Follow standard EXPORT_SYMBOL() declarations

Just a tidy up to follow the standard EXPORT_SYMBOL*() declarations
in order to improve grep-ability.

- Move EXPORT_SYMBOL*() to the position right after its definition
- Remove superfluous blank line before EXPORT_SYMBOL*() lines

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Follow standard EXPORT_SYMBOL() declarations
Takashi Iwai [Fri, 16 Jun 2017 14:12:30 +0000 (16:12 +0200)]
ALSA: pcm: Follow standard EXPORT_SYMBOL() declarations

Just a tidy up to follow the standard EXPORT_SYMBOL*() declarations
in order to improve grep-ability.

- Remove superfluous blank line before EXPORT_SYMBOL*() lines

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda/realtek - Add ALC256 HP depop function
Kailang Yang [Fri, 16 Jun 2017 08:54:35 +0000 (16:54 +0800)]
ALSA: hda/realtek - Add ALC256 HP depop function

Add this functions, it could support ALC256 for HP depop functions.
It also can solve some ALC256 machine plug headset cause power
off issue.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hal2: switch to dma_alloc_attrs
Christoph Hellwig [Fri, 16 Jun 2017 07:17:09 +0000 (09:17 +0200)]
ALSA: hal2: switch to dma_alloc_attrs

Use dma_alloc_attrs directly instead of the dma_alloc_noncoherent wrapper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Don't treat NULL chmap as a fatal error
Takashi Iwai [Wed, 14 Jun 2017 14:20:32 +0000 (16:20 +0200)]
ALSA: pcm: Don't treat NULL chmap as a fatal error

The standard PCM chmap helper callbacks treat the NULL info->chmap as
a fatal error and spews the kernel warning with stack trace when
CONFIG_SND_DEBUG is on.  This was OK, originally it was supposed to be
always static and non-NULL.  But, as the recent addition of Intel LPE
audio driver shows, the chmap content may vary dynamically, and it can
be even NULL when disconnected.  The user still sees the kernel
warning unnecessarily.

For clearing such a confusion, this patch simply removes the
snd_BUG_ON() in each place, just returns an error without warning.

Cc: <stable@vger.kernel.org> # v4.11+
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: remove SNDRV_PCM_IOCTL1_GSTATE internal command
Takashi Sakamoto [Wed, 14 Jun 2017 10:30:04 +0000 (19:30 +0900)]
ALSA: pcm: remove SNDRV_PCM_IOCTL1_GSTATE internal command

SNDRV_PCM_IOCTL1_GSTATE was firstly introduced in v0.9.0, however never
be used and the purpose is missing.

This commit removes the long-abandoned command, bye.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: remove SNDRV_PCM_IOCTL1_INFO internal command
Takashi Sakamoto [Wed, 14 Jun 2017 10:30:03 +0000 (19:30 +0900)]
ALSA: pcm: remove SNDRV_PCM_IOCTL1_INFO internal command

Drivers can implement 'struct snd_pcm_ops.ioctl' to handle some requests
from ALSA PCM core. These requests are internal purpose in kernel land.
Usually common set of operations are used for it.

SNDRV_PCM_IOCTL1_INFO is one of the requests. According to code comment,
it has been obsoleted in the old days.

We can see old releases in ftp.alsa-project.org. The command was firstly
introduced in v0.5.0 release as SND_PCM_IOCTL1_INFO, to allow drivers to
fill data of 'struct snd_pcm_channel_info' type. In v0.9.0 release,
this was obsoleted by the other commands for ioctl(2) such as
SNDRV_PCM_IOCTL_CHANNEL_INFO.

This commit removes the long-abandoned command, bye.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda - Add Coffelake PCI ID
Megha Dey [Wed, 14 Jun 2017 04:21:56 +0000 (09:51 +0530)]
ALSA: hda - Add Coffelake PCI ID

Coffelake is another Intel part, so need to add PCI ID for it.

Signed-off-by: Megha Dey <megha.dey@intel.com>
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Skip ack callback without actual appl_ptr update
Takashi Iwai [Tue, 13 Jun 2017 13:57:28 +0000 (15:57 +0200)]
ALSA: pcm: Skip ack callback without actual appl_ptr update

We call ack callback whenever appl_ptr gets updated via
pcm_lib_apply_appl_ptr().  There are various code paths to call this
function.  A part of them are for read/write/forward/rewind, where the
appl_ptr is always changed and thus the call of ack is mandatory.
OTOH, another part of code paths are from the explicit user call,
e.g. via SYNC_PTR ioctl.  There, we may receive the same appl_ptr
value, and in such a case, calling ack is obviously superfluous.

This patch adds the check of the given appl_ptr value, and returns
immediately if it's no real update.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Use common PCM_RUNTIME_CHECK() for sanity checks
Takashi Iwai [Tue, 24 May 2016 13:53:36 +0000 (15:53 +0200)]
ALSA: pcm: Use common PCM_RUNTIME_CHECK() for sanity checks

Just a code cleanup.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Preprocess PAUSED or SUSPENDED stream before PREPARE
Takashi Iwai [Tue, 24 May 2016 13:40:03 +0000 (15:40 +0200)]
ALSA: pcm: Preprocess PAUSED or SUSPENDED stream before PREPARE

Calling PREPARE ioctl to the stream in either PAUSED or SUSPENDED
state may confuse some drivers that don't handle the state properly.
Instead of fixing each driver, PCM core should take care of the proper
state change before actually trying to (re-)prepare the stream.
Namely, when the stream is in PAUSED state, it triggers PAUSE_RELEASE,
and when in SUSPENDED state, it triggers STOP, before calling prepare
callbacks.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Allow dropping stream directly after resume
Takashi Iwai [Tue, 24 May 2016 13:08:31 +0000 (15:08 +0200)]
ALSA: pcm: Allow dropping stream directly after resume

So far, the PCM core refuses DROP ioctl when the stream in the
suspended state.  This was basically to avoid the invalid state change
*during* the suspend.  But since we protect the power change globally
in the common PCM ioctl caller side, it's guaranteed that
snd_pcm_drop() is called at the right power state.  So we can assume
that the drop of stream is safe immediately after SUSPENDED state.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Apply power lock globally to common ioctls
Takashi Iwai [Tue, 24 May 2016 13:07:39 +0000 (15:07 +0200)]
ALSA: pcm: Apply power lock globally to common ioctls

All PCM common ioctls should run only in the powered up state, but
currently only a few ioctls do the proper snd_power_lock() and
snd_power_wait() invocations.  Instead of adding to each place, do it
commonly in the caller side, so that all these ioctls are assured to
be operated at the power up state.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: Clean up SNDRV_PCM_IOCTL_PAUSE code
Takashi Iwai [Tue, 24 May 2016 12:58:04 +0000 (14:58 +0200)]
ALSA: pcm: Clean up SNDRV_PCM_IOCTL_PAUSE code

Use snd_pcm_action_lock_irq() helper instead of open coding.
No functional change.

Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoMerge branch 'topic/seq-kconfig' into for-next
Takashi Iwai [Tue, 13 Jun 2017 05:50:09 +0000 (07:50 +0200)]
Merge branch 'topic/seq-kconfig' into for-next

7 years agoALSA: pcm: use %s instead of %c for format of PCM buffer tracepoints
Takashi Sakamoto [Mon, 12 Jun 2017 00:41:46 +0000 (09:41 +0900)]
ALSA: pcm: use %s instead of %c for format of PCM buffer tracepoints

As long as I know, in userspace, '%c' format on printing format for
tracepoint is replaced with '>c<' by existent tracing program; i.g.
'perf-trace' and 'trace-cmd'. This is inconvenient.

This commit replaces the format with '%s'. The length of letters in the
format string is not changed, thus this commit doesn't increase object
size.

In theory, I should work for improvements of these tracing programs, but
here I'd like to save my time to work for the other projects.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: add 'applptr' event of tracepoint
Takashi Sakamoto [Mon, 12 Jun 2017 00:41:45 +0000 (09:41 +0900)]
ALSA: pcm: add 'applptr' event of tracepoint

In design of ALSA PCM core, status and control data for runtime of ALSA
PCM substream are shared between kernel/user spaces by page frame
mapping with read-only attribute. Both of hardware-side and
application-side position on PCM buffer are maintained as a part of
the status data. In a view of ALSA PCM application, these two positions
can be updated by executing ioctl(2) with some commands.

There's an event of tracepoint for hardware-side position; 'hwptr'.
On the other hand, no events for application-side position. This commit
adds a new event for this purpose; 'applptr'. When the application-side
position is changed in kernel space, this event is probed with useful
information for developers.

I note that the event is not probed for all of ALSA PCM applications, When
applications are written by read/write programming scenario, the event is
surely probed. The applications execute ioctl(2) with
SNDRV_PCM_IOCTL_[READ|WRITE][N/I]_FRAMES to read/write any PCM frame, then
ALSA PCM core updates the application-side position in kernel land.
However, when applications are written by mmap programming scenario, if
maintaining the application side position in kernel space accurately,
applications should voluntarily execute ioctl(2) with
SNDRV_PCM_IOCTL_SYNC_PTR to commit the number of handled PCM frames. If
not voluntarily, the application-side position is not changed, thus the
added event is not probed.

There's a loophole, using architectures to which ALSA PCM core judges
non cache coherent. In this case, the status and control data is not mapped
into processe's VMA for any applications. Userland library, alsa-lib, is
programmed for this case. It executes ioctl(2) with
SNDRV_PCM_IOCTL_SYNC_PTR command every time to requiring the status and
control data.

ARM is such an architecture. Below is an example with serial sound interface
(ssi) on i.mx6 quad core SoC. I use v4.1 kernel released by fsl-community
with patches from VIA Tech. Inc. for VAB820, and my backport patches for
relevant features for this patchset. I use Ubuntu 17.04 from
ports.ubuntu.com as user land for armhf architecture.

$ aplay -v -M -D hw:imx6vab820sgtl5,0 /dev/urandom -f S16_LE -r 48000 --period-size=128 --buffer-size=256
Playing raw data '/dev/urandom' : Signed 16 bit Little Endian, Rate 48000 Hz, Mono
Hardware PCM card 0 'imx6-vab820-sgtl5000' device 0 subdevice 0
Its setup is:
  stream       : PLAYBACK
  access       : MMAP_INTERLEAVED
  format       : S16_LE
  subformat    : STD
  channels     : 1
  rate         : 48000
  exact rate   : 48000 (48000/1)
  msbits       : 16
  buffer_size  : 256
  period_size  : 128
  period_time  : 2666
  tstamp_mode  : NONE
  tstamp_type  : MONOTONIC
  period_step  : 1
  avail_min    : 128
  period_event : 0
  start_threshold  : 256
  stop_threshold   : 256
  silence_threshold: 0
  silence_size : 0
  boundary     : 1073741824
  appl_ptr     : 0
  hw_ptr       : 0
mmap_area[0] = 0x76f98000,0,16 (16)

$ trace-cmd record -e snd_pcm:hwptr -e snd_pcm:applptr
$ trace-cmd report
...
60.208495: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=0, period=128, buf=256
60.208633: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=0, period=128, buf=256
60.210022: hwptr:   pcmC0D0p/sub0: IRQ: pos=128, old=1536, base=1536, period=128, buf=256
60.210202: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=128, period=128, buf=256
60.210344: hwptr:   pcmC0D0p/sub0: POS: pos=128, old=1664, base=1536, period=128, buf=256
60.210348: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=128, period=128, buf=256
60.210486: applptr: pcmC0D0p/sub0: prev=1792, curr=1792, avail=128, period=128, buf=256
60.210626: applptr: pcmC0D0p/sub0: prev=1792, curr=1920, avail=0, period=128, buf=256
60.211002: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=0, period=128, buf=256
60.211142: hwptr:   pcmC0D0p/sub0: POS: pos=128, old=1664, base=1536, period=128, buf=256
60.211146: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=0, period=128, buf=256
60.211287: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=0, period=128, buf=256
60.212690: hwptr:   pcmC0D0p/sub0: IRQ: pos=0, old=1664, base=1536, period=128, buf=256
60.212866: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=128, period=128, buf=256
60.212999: hwptr:   pcmC0D0p/sub0: POS: pos=0, old=1792, base=1792, period=128, buf=256
60.213003: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=128, period=128, buf=256
60.213135: applptr: pcmC0D0p/sub0: prev=1920, curr=1920, avail=128, period=128, buf=256
60.213276: applptr: pcmC0D0p/sub0: prev=1920, curr=2048, avail=0, period=128, buf=256
60.213654: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=0, period=128, buf=256
60.213796: hwptr:   pcmC0D0p/sub0: POS: pos=0, old=1792, base=1792, period=128, buf=256
60.213800: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=0, period=128, buf=256
60.213937: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=0, period=128, buf=256
60.215356: hwptr:   pcmC0D0p/sub0: IRQ: pos=128, old=1792, base=1792, period=128, buf=256
60.215542: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=128, period=128, buf=256
60.215679: hwptr:   pcmC0D0p/sub0: POS: pos=128, old=1920, base=1792, period=128, buf=256
60.215683: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=128, period=128, buf=256
60.215813: applptr: pcmC0D0p/sub0: prev=2048, curr=2048, avail=128, period=128, buf=256
60.215947: applptr: pcmC0D0p/sub0: prev=2048, curr=2176, avail=0, period=128, buf=256
...

We can surely see 'applptr' event is probed even if the application run
for mmap programming scenario ('-M' option and 'hw' plugin). Below is a
result of strace:

02:44:15.886382 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.887203 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}])
02:44:15.887471 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.887637 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.887805 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.887969 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.888132 read(3, "..."..., 256) = 256
02:44:15.889040 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.889221 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.889431 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.889606 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}])
02:44:15.889833 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.889998 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.890164 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.891048 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.891228 read(3, "..."..., 256) = 256
02:44:15.891497 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.891661 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.891829 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0
02:44:15.891991 poll([{fd=4, events=POLLOUT|POLLERR|POLLNVAL}], 1, -1) = 1 ([{fd=4, revents=POLLOUT}])
02:44:15.893007 ioctl(4, SNDRV_PCM_IOCTL_SYNC_PTR, 0x56a32b30) = 0

We can see 7 calls of ioctl(2) with SNDRV_PCM_IOCTL_SYNC_PTR per loop with
call of poll(2). 128 PCM frames are transferred per loop of one poll(2),
because the PCM substream is configured with S16_LE format and 1 channel
(2 byte * 1 * 128 = 256 bytes). This equals to the size of period of PCM
buffer. Comparing to the probed data, one of the 7 calls of ioctl(2) is
actually used to commit the number of copied PCM frames to kernel space.
The other calls are just used to check runtime status of PCM substream;
e.g. XRUN.

The tracepoint event is useful to investigate this case. I note that below
modules are related to the above sample.

 * snd-soc-dummy.ko
 * snd-soc-imx-sgtl5000.ko
 * snd-soc-fsl-ssi.ko
 * snd-soc-imx-pcm-dma.ko
 * snd-soc-sgtl5000.ko

My additional note is lock acquisition. The event is probed under acquiring
PCM stream lock. This means that calculation in the event is free from
any hardware events.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: unify codes to operate application-side position on PCM buffer
Takashi Sakamoto [Mon, 12 Jun 2017 00:41:44 +0000 (09:41 +0900)]
ALSA: pcm: unify codes to operate application-side position on PCM buffer

In a series of recent work, ALSA PCM core got some arrangements to handle
application-side position on PCM buffer. However, relevant codes still
disperse to two translation units

This commit unifies these codes into a helper function.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: seq: Allow the modular sequencer registration
Takashi Iwai [Fri, 9 Jun 2017 13:11:58 +0000 (15:11 +0200)]
ALSA: seq: Allow the modular sequencer registration

Many drivers bind the sequencer stuff in off-load by another driver
module, so that it's loaded only on demand.  In the current code, this
mechanism doesn't work when the driver is built-in while the sequencer
is module.  We check with IS_REACHABLE() and enable only when the
sequencer is in the same level of build.

However, this is basically a overshoot.  The binder code
(snd-seq-device) is an individual module from the sequencer core
(snd-seq), and we just have to make the former a built-in while
keeping the latter a module for allowing the scenario like the above.

This patch achieves that by rewriting Kconfig slightly.  Now, a driver
that provides the manual sequencer device binding should select
CONFIG_SND_SEQ_DEVICE in a way as
select SND_SEQ_DEVICE if SND_SEQUENCER != n

Note that the "!=n" is needed here to avoid the influence of the
sequencer core is module while the driver is built-in.

Also, since rawmidi.o may be linked with snd_seq_device.o when
built-in, we have to shuffle the code to make the linker happy.
(the kernel linker isn't smart enough yet to handle such a case.)
That is, snd_seq_device.c is moved to sound/core from sound/core/seq,
as well as Makefile.

Last but not least, the patch replaces the code using IS_REACHABLE()
with IS_ENABLED(), since now the condition meets always when enabled.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: probe events when parameters are changed actually
Takashi Sakamoto [Sun, 11 Jun 2017 14:56:13 +0000 (23:56 +0900)]
ALSA: pcm: probe events when parameters are changed actually

At present, trace events are probed even if corresponding parameter is
not actually changed. This is inconvenient.

This commit improves the behaviour.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: return error immediately for parameters handling
Takashi Sakamoto [Sun, 11 Jun 2017 14:56:12 +0000 (23:56 +0900)]
ALSA: pcm: return error immediately for parameters handling

When refining mask/interval parameters, helper functions can return error
code. This error is not handled immediately. This seems to return
parameters to userspace applications in its meddle of processing.

However, in general, when receiving error from system calls, the
application might not handle argument buffer. It's reasonable to
judge the above design as superfluity.

This commit handles the error immediately.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: synth: Select snd-emux-synth explicitly
Takashi Iwai [Fri, 9 Jun 2017 12:57:51 +0000 (14:57 +0200)]
ALSA: synth: Select snd-emux-synth explicitly

Instead of the non-standard way to enable the build of snd-emux-synth
module inside Makefile, rewrite Kconfig to select the item explicitly
from each driver (sbawe and emu10k1).  This is the standard way.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: seq: Reorganize kconfig and build
Takashi Iwai [Fri, 9 Jun 2017 12:40:18 +0000 (14:40 +0200)]
ALSA: seq: Reorganize kconfig and build

This is a slightly intensive rewrite of Kconfig and Makefile about
ALSA sequencer stuff.

The first major change is that the kconfig items for the sequencer are
moved to sound/core/seq/Kconfig.  OK, that's easy.

The substantial change is that, instead of hackish top-level module
selection in Makefile, we define a Kconfig item for each sequencer
module.  The driver that requires such sequencer components select
exclusively the kconfig items.  This is more straightforward and
standard way.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: seq: Allow the tristate build of OSS emulation
Takashi Iwai [Fri, 9 Jun 2017 12:06:46 +0000 (14:06 +0200)]
ALSA: seq: Allow the tristate build of OSS emulation

Currently OSS sequencer emulation is tied with ALSA sequencer core,
both are built in the same level; i.e. when CONFIG_SND_SEQUENCER=y,
the OSS sequencer emulation is also always built-in, even though the
functionality can be built as an individual module.

This patch changes the rule and allows users to build snd-seq-oss
module while others are built-in.  Essentially, it's just a few simple
changes in Kconfig and Makefile.  Some driver codes like opl3 need to
convert from the simple ifdef to IS_ENABLED().  But that's all.

You might wonder how about the dependency: right, it can be messy, but
it still works.  Since we rewrote the sequencer binding with the
standard bus, the driver can be bound at any time on demand.  So, the
synthesizer driver module can be loaded individually from the OSS
emulation core before/after it.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: Make CONFIG_SND_OSSEMUL user-selectable
Takashi Iwai [Fri, 9 Jun 2017 11:56:05 +0000 (13:56 +0200)]
ALSA: Make CONFIG_SND_OSSEMUL user-selectable

Currently CONFIG_SND_OSSEMUL is selected by each config like
CONFIG_SND_PCM_OSS.  But, as see in the raw MIDI code that is built
conditionally with CONFIG_SND_OSSEMUL, we should rather make
CONFIG_SND_OSSEMUL user-selectable as the top kconfig item, and leave
the rest depending on it.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: use friendly name for id of PCM substream in trace print
Takashi Sakamoto [Fri, 9 Jun 2017 12:46:50 +0000 (21:46 +0900)]
ALSA: pcm: use friendly name for id of PCM substream in trace print

Use the same print format of snd_pcm_debug_name() for userspace tracing
program.

Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: add tracepoints for final selection process of hardware parameters
Takashi Sakamoto [Fri, 9 Jun 2017 12:46:49 +0000 (21:46 +0900)]
ALSA: pcm: add tracepoints for final selection process of hardware parameters

Results of ioctl(2) with SNDRV_PCM_IOCTL_HW_REFINE and
SNDRV_PCM_IOCTL_HW_PARAMS are different, because the latter has single
value for several parameters; e.g. channels of PCM substream. Selection
of the single value is done independently of application of constraints.
It's helpful for developers to trace the selection process.

This commit adds tracepoints to snd_pcm_hw_params_choose() for the
purpose.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: localize snd_pcm_hw_params_choose()
Takashi Sakamoto [Fri, 9 Jun 2017 12:46:48 +0000 (21:46 +0900)]
ALSA: pcm: localize snd_pcm_hw_params_choose()

As of v4.12, snd_pcm_hw_params_choose() is just called in a process
context of ioctl(2) with SNDRV_PCM_IOCTL_HW_PARAMS. The function locates
in a different file, which has no tracepoints.

This commit moves the function to a file with the tracepoints for later
commit.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: sparc: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:23:22 +0000 (14:23 +0200)]
ALSA: sparc: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: via82xx: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:23:13 +0000 (14:23 +0200)]
ALSA: via82xx: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: sonicvibes: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:22:55 +0000 (14:22 +0200)]
ALSA: sonicvibes: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: rme9652: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:22:43 +0000 (14:22 +0200)]
ALSA: rme9652: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hdspm: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:22:35 +0000 (14:22 +0200)]
ALSA: hdspm: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hdsp: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:22:26 +0000 (14:22 +0200)]
ALSA: hdsp: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: rme96: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:22:10 +0000 (14:22 +0200)]
ALSA: rme96: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: rme32: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:22:02 +0000 (14:22 +0200)]
ALSA: rme32: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: nm256: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:21:49 +0000 (14:21 +0200)]
ALSA: nm256: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: intel8x0: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:21:31 +0000 (14:21 +0200)]
ALSA: intel8x0: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: ice1724: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:20:52 +0000 (14:20 +0200)]
ALSA: ice1724: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: ice1712: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:20:40 +0000 (14:20 +0200)]
ALSA: ice1712: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: hda: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:20:07 +0000 (14:20 +0200)]
ALSA: hda: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: es1938: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:19:56 +0000 (14:19 +0200)]
ALSA: es1938: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: ens137x: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:19:39 +0000 (14:19 +0200)]
ALSA: ens137x: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: fm801: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:19:28 +0000 (14:19 +0200)]
ALSA: fm801: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: emu10k1: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:19:20 +0000 (14:19 +0200)]
ALSA: emu10k1: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: cs46xx: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:19:05 +0000 (14:19 +0200)]
ALSA: cs46xx: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: cmipci: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:18:47 +0000 (14:18 +0200)]
ALSA: cmipci: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: bt87x: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:18:33 +0000 (14:18 +0200)]
ALSA: bt87x: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: azt3328: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:18:16 +0000 (14:18 +0200)]
ALSA: azt3328: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: au88x0: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:18:01 +0000 (14:18 +0200)]
ALSA: au88x0: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: atiixp: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:17:39 +0000 (14:17 +0200)]
ALSA: atiixp: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: ali5451: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:17:23 +0000 (14:17 +0200)]
ALSA: ali5451: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: parisc: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:17:04 +0000 (14:17 +0200)]
ALSA: parisc: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: wss: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:16:43 +0000 (14:16 +0200)]
ALSA: wss: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: sb: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:16:34 +0000 (14:16 +0200)]
ALSA: sb: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: gus: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:16:25 +0000 (14:16 +0200)]
ALSA: gus: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: es18xx: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:16:10 +0000 (14:16 +0200)]
ALSA: es18xx: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: es1688: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:15:49 +0000 (14:15 +0200)]
ALSA: es1688: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: cs423x: Constify hw_constraints
Takashi Iwai [Wed, 7 Jun 2017 12:12:16 +0000 (14:12 +0200)]
ALSA: cs423x: Constify hw_constraints

snd_pcm_hw_constraint_list(), *_ratnums() and *_ratdens() receive the
const pointers.  Constify the corresponding static objects for better
hardening.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: vx: vx_pcm: constify vx_pcm_playback_ops and vx_pcm_capture_ops.
Arvind Yadav [Fri, 9 Jun 2017 07:05:43 +0000 (12:35 +0530)]
ALSA: vx: vx_pcm: constify vx_pcm_playback_ops and vx_pcm_capture_ops.

File size before:
   text    data     bss     dec     hex filename
   7126     240       0    7366    1cc6 sound/drivers/vx/vx_pcm.o

File size After adding 'const':
   text    data     bss     dec     hex filename
   7382       0       0    7382    1cd6 sound/drivers/vx/vx_pcm.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA : pcsp: pcsp_lib: constify snd_pcsp_playback_ops
Arvind Yadav [Fri, 9 Jun 2017 06:09:56 +0000 (11:39 +0530)]
ALSA : pcsp: pcsp_lib: constify snd_pcsp_playback_ops

File size before:
   text    data     bss     dec     hex filename
   2027     168       1    2196     894 sound/drivers/pcsp/pcsp_lib.o

File size After:
   text    data     bss     dec     hex filename
   2155      40       1    2196     894 sound/drivers/pcsp/pcsp_lib.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: move fixup of info flag after selecting single parameters
Takashi Sakamoto [Fri, 9 Jun 2017 00:34:40 +0000 (09:34 +0900)]
ALSA: pcm: move fixup of info flag after selecting single parameters

When drivers register no flags about information of PCM hardware, ALSA
PCM core fixups it roughly. Currently, this operation places in a
function snd_pcm_hw_refine(). It can be moved to a function
fixup_unreferenced_params() because it doesn't affects operations
between these two functions.

This idea is better to bundle codes with similar purposes and this commit
achieves it.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: calculate non-mask/non-interval parameters always when possible
Takashi Sakamoto [Fri, 9 Jun 2017 00:34:39 +0000 (09:34 +0900)]
ALSA: pcm: calculate non-mask/non-interval parameters always when possible

A structure for parameters of PCM runtime has parameters which are
not classified as mask/interval type. They are decided only when
corresponding normal parameters have unique values.
 * struct snd_pcm_hw_params.msbits
 * struct snd_pcm_hw_params.rate_num
 * struct snd_pcm_hw_params.rate_den
 * struct snd_pcm_hw_params.fifo_size

Current implementation of hw_params ioctl sometimes doesn't decide these
parameters even if corresponding parameters are fixed, because these
parameters are evaluated before a call of snd_pcm_hw_params_choose().

This commit adds a helper function to process the parameters and call it
in proper positions.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: use helper functions to refer parameters as constants
Takashi Sakamoto [Fri, 9 Jun 2017 00:34:38 +0000 (09:34 +0900)]
ALSA: pcm: use helper functions to refer parameters as constants

To fixup some parameters, ALSA PCM core refers the other parameters as
constants. There're some macros for this purpose.

This commit replaces codes with them.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: add comment about application of rule to PCM parameters
Takashi Sakamoto [Thu, 8 Jun 2017 21:37:06 +0000 (06:37 +0900)]
ALSA: pcm: add comment about application of rule to PCM parameters

Drivers add rules of parameters to runtime of PCM substream, when
applications open ALSA PCM character device. When applications call
ioctl(2) with SNDRV_PCM_IOCTL_HW_REFINE or SNDRV_PCM_IOCTL_HW_PARAMS, the
rules are applied to the parameters and return the result to user space.

The rule can have dependency between parameters. Additionally, it can have
condition flags about application of rules. Userspace applications can
indicate the flags to suppress change of parameters.

This commit attempts to describe the mechanism.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: use helper functions to check whether parameters are determined
Takashi Sakamoto [Thu, 8 Jun 2017 21:37:05 +0000 (06:37 +0900)]
ALSA: pcm: use helper functions to check whether parameters are determined

A commit 8bea869c5e56 ("ALSA: PCM midlevel: improve fifo_size handling")
allows drivers to implement calculation of fifo size in parameter
structure. This calculation runs only when two of the other parameters
have single value.

In ALSA PCM core, there're some helper functions for the case. This commit
applies the functions instead of value comparison.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: adaption of code formatting
Takashi Sakamoto [Thu, 8 Jun 2017 21:37:04 +0000 (06:37 +0900)]
ALSA: pcm: adaption of code formatting

This commit modifies current for readability in below aspects:
 - use bool type variable instead of int type variable assigned to 0/1
 - move variable definition from loop to top of the function definition

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: remove function local variable with alternative evaluation
Takashi Sakamoto [Thu, 8 Jun 2017 21:37:03 +0000 (06:37 +0900)]
ALSA: pcm: remove function local variable with alternative evaluation

A local variable is used to judge whether a parameter should be handled
due to reverse dependency of the other rules. However, this can be
obsoleted by check of a sentinel in dependency array.

This commit removes the local variable and check the sentinel to reduce
stack usage.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: use goto statement instead of while statement to reduce indentation
Takashi Sakamoto [Thu, 8 Jun 2017 21:37:02 +0000 (06:37 +0900)]
ALSA: pcm: use goto statement instead of while statement to reduce indentation

In a process to calculate parameters of PCM substream, application of all
rules is iterated several times till parameter dependencies are satisfied.
In current implementation, two loops are used for the design, however this
brings two-level indentation and decline readability.

This commit attempts to reduce the indentation by using goto statement,
instead of outer while loop.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
7 years agoALSA: pcm: add a helper function to apply parameter rules
Takashi Sakamoto [Thu, 8 Jun 2017 21:37:01 +0000 (06:37 +0900)]
ALSA: pcm: add a helper function to apply parameter rules

Application of rules to parameters of PCM substream is done in a call of
snd_pcm_hw_refine(), while the function includes much codes and is not
enough friendly to readers.

This commit splits the codes to a separated function so that readers can
get it easily. I leave desicion into compilers to merge the function into
its callee.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>