- 03 9月, 2014 2 次提交
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由 Takashi Iwai 提交于
The previous commit for the non-atomic PCM ops added more codes to snd_pcm_stream_lock() and its variants. Since they are inlined functions, it resulted in a significant code size bloat. For reducing the size bloat, this patch changes the inline functions to the normal function calls. The export of rwlock and rwsem are removed as well, since they are referred only in pcm_native.c now. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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由 Takashi Iwai 提交于
Currently, many PCM operations are performed in a critical section protected by spinlock, typically the trigger and pointer callbacks are assumed to be atomic. This is basically because some trigger action (e.g. PCM stop after drain or xrun) is done in the interrupt handler. If a driver runs in a threaded irq, however, this doesn't have to be atomic. And many devices want to handle trigger in a non-atomic context due to lengthy communications. This patch tries all PCM calls operational in non-atomic context. What it does is very simple: replaces the substream spinlock with the corresponding substream mutex when pcm->nonatomic flag is set. The driver that wants to use the non-atomic PCM ops just needs to set the flag and keep the rest as is. (Of course, it must not handle any PCM ops in irq context.) Note that the code doesn't check whether it's atomic-safe or not, but trust in 100% that the driver sets pcm->nonatomic correctly. One possible problem is the case where linked PCM substreams have inconsistent nonatomic states. For avoiding this, snd_pcm_link() returns an error if one tries to link an inconsistent PCM substream. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 21 7月, 2014 1 次提交
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由 Takashi Iwai 提交于
For controlling the new fields more strictly, add sw_params.proto field indicating the protocol version of the user-space. User-space should fill the SNDRV_PCM_VERSION value it's built with, then kernel can know whether the new fields should be evaluated or not. And now tstamp_type field is evaluated only when the valid value is set there. This avoids the wrong override of tstamp_type to zero, which is SNDRV_PCM_TSTAMP_TYPE_GETTIMEOFDAY. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 10 7月, 2014 2 次提交
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由 Takashi Iwai 提交于
For allowing adjusting the timestamp type on the fly, add it to sw_params. The existing ioctl is still kept for compatibility. Along with this, increment the PCM protocol version. The extension was suggested by Clemens Ladisch. Acked-by: NJaroslav Kysela <perex@perex.cz> Reviewed-by: NMark Brown <broonie@linaro.org> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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由 Takashi Iwai 提交于
No functional change. Acked-by: NJaroslav Kysela <perex@perex.cz> Reviewed-by: NMark Brown <broonie@linaro.org> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 14 2月, 2014 1 次提交
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由 Takashi Iwai 提交于
Use dev_err() & co as much as possible. If not available (no device assigned at the calling point), use pr_xxx() helpers instead. For simplicity, introduce new helpers for pcm stream, pcm_err(), etc. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 10 2月, 2014 2 次提交
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由 Takashi Iwai 提交于
Replace the lengthy #if defined(XXX) || defined(XXX_MODULE) with the new IS_ENABLED() macro. The patch still doesn't cover all ifdefs. For example, the dependency on CONFIG_GAMEPORT is still open-coded because this also has an extra dependency on MODULE. Similarly, an open-coded ifdef in pcm_oss.c and some sequencer-related stuff are left untouched. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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由 Masanari Iida 提交于
This patch fixed 2 typos in DocBook/alsa-driver-api.xml. It is because this file is generated by make xmldocs, I have to fix typos within source files. Signed-off-by: NMasanari Iida <standby24x7@gmail.com> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 29 10月, 2013 1 次提交
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由 Takashi Iwai 提交于
Just to improve readability. Spotted by coverity CID 115002 and 115003. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 24 10月, 2013 2 次提交
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由 Takashi Iwai 提交于
It turned out that we can't use gen_pool_*() functions on archs without CONFIG_GENERIC_ALLOCATOR (resulting in missing symbols), since linux/genalloc.h doesn't provide dummy functions for all. We'd be able to fix linux/genalloc.h size, but I take an easier path for now... Reported-by: NFengguang Wu <fengguang.wu@intel.com> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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由 Nicolin Chen 提交于
Now it's quite common that an SoC contains its on-chip internal RAM. By using this RAM space for DMA buffer during audio playback/record, we can shutdown the voltage for external RAM to save power. So add new DEV type with iram malloc()/free() and accordingly modify current default mmap() for the iram circumstance. Signed-off-by: NNicolin Chen <b42378@freescale.com> Reviewed-by: NLars-Peter Clausen <lars@metafoo.de> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 29 6月, 2013 1 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 15 6月, 2013 1 次提交
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由 Al Viro 提交于
in case when snd_pcm_stream_linked(substream) is true, we end up leaking group. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 08 5月, 2013 1 次提交
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由 Kent Overstreet 提交于
Faster kernel compiles by way of fewer unnecessary includes. [akpm@linux-foundation.org: fix fallout] [akpm@linux-foundation.org: fix build] Signed-off-by: NKent Overstreet <koverstreet@google.com> Cc: Zach Brown <zab@redhat.com> Cc: Felipe Balbi <balbi@ti.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Jens Axboe <axboe@kernel.dk> Cc: Asai Thambi S P <asamymuthupa@micron.com> Cc: Selvan Mani <smani@micron.com> Cc: Sam Bradshaw <sbradshaw@micron.com> Cc: Jeff Moyer <jmoyer@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Benjamin LaHaise <bcrl@kvack.org> Reviewed-by: N"Theodore Ts'o" <tytso@mit.edu> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 20 4月, 2013 1 次提交
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由 Linus Torvalds 提交于
This is my example conversion of a few existing mmap users. The pcm mmap case is one of the more straightforward ones. Acked-by: NTakashi Iwai <tiwai@suse.de> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 12 3月, 2013 1 次提交
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由 Yacine Belkadi 提交于
script/kernel-doc reports the following type of warnings (when run in verbose mode): Warning(sound/core/init.c:152): No description found for return value of 'snd_card_create' To fix that: - add missing descriptions of function return values - use "Return:" sections to describe those return values Along the way: - complete some descriptions - fix some typos Signed-off-by: NYacine Belkadi <yacine.belkadi.1@gmail.com> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 23 2月, 2013 1 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 21 11月, 2012 1 次提交
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由 Sachin Kamat 提交于
Return the value obtained from snd_pcm_hw_constraint_minmax() instead of -EINVAL. Silences the following smatch warning: sound/core/pcm_native.c:2003 snd_pcm_hw_constraints_complete() info: why not propagate 'err' from snd_pcm_hw_constraint_minmax() instead of -22? Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 08 11月, 2012 1 次提交
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由 Takashi Iwai 提交于
There are uncovered cases whether the card refcount introduced by the commit a0830dbd isn't properly increased or decreased: - OSS PCM and mixer success paths - When lookup function gets NULL This patch fixes these places. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=50251 Cc: <stable@vger.kernel.org> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 30 10月, 2012 3 次提交
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由 Takashi Iwai 提交于
When disconnect callback is called, each component should wake up sleepers and check card->shutdown flag for avoiding the endless sleep blocking the proper resource release. Cc: <stable@vger.kernel.org> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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由 Takashi Iwai 提交于
For more strict protection for wild disconnections, a refcount is introduced to the card instance, and let it up/down when an object is referred via snd_lookup_*() in the open ops. The free-after-last-close check is also changed to check this refcount instead of the empty list, too. Reported-by: NMatthieu CASTET <matthieu.castet@parrot.com> Cc: <stable@vger.kernel.org> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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由 Takashi Iwai 提交于
Fix races at PCM disconnection: - while a PCM device is being opened or closed - while the PCM state is being changed without lock in prepare, hw_params, hw_free ops Reported-by: NMatthieu CASTET <matthieu.castet@parrot.com> Cc: <stable@vger.kernel.org> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 23 10月, 2012 1 次提交
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由 Pierre-Louis Bossart 提交于
ALSA did not provide any direct means to infer the audio time for A/V sync and system/audio time correlations (eg. PulseAudio). Applications had to track the number of samples read/written and add/subtract the number of samples queued in the ring buffer. This accounting led to small errors, typically several samples, due to the two-step process. Computing the audio time in the kernel is more direct, as all the information is available in the same routines. Also add new .audio_wallclock routine to enable fine-grain synchronization between monotonic system time and audio hardware time. Using the wallclock, if supported in hardware, allows for a much better sub-microsecond precision and a common drift tracking for all devices sharing the same wall clock (master clock). Signed-off-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 09 10月, 2012 1 次提交
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由 Konstantin Khlebnikov 提交于
A long time ago, in v2.4, VM_RESERVED kept swapout process off VMA, currently it lost original meaning but still has some effects: | effect | alternative flags -+------------------------+--------------------------------------------- 1| account as reserved_vm | VM_IO 2| skip in core dump | VM_IO, VM_DONTDUMP 3| do not merge or expand | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP 4| do not mlock | VM_IO, VM_DONTEXPAND, VM_HUGETLB, VM_PFNMAP This patch removes reserved_vm counter from mm_struct. Seems like nobody cares about it, it does not exported into userspace directly, it only reduces total_vm showed in proc. Thus VM_RESERVED can be replaced with VM_IO or pair VM_DONTEXPAND | VM_DONTDUMP. remap_pfn_range() and io_remap_pfn_range() set VM_IO|VM_DONTEXPAND|VM_DONTDUMP. remap_vmalloc_range() set VM_DONTEXPAND | VM_DONTDUMP. [akpm@linux-foundation.org: drivers/vfio/pci/vfio_pci.c fixup] Signed-off-by: NKonstantin Khlebnikov <khlebnikov@openvz.org> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Carsten Otte <cotte@de.ibm.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: Eric Paris <eparis@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Hugh Dickins <hughd@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Morris <james.l.morris@oracle.com> Cc: Jason Baron <jbaron@redhat.com> Cc: Kentaro Takeda <takedakn@nttdata.co.jp> Cc: Matt Helsley <matthltc@us.ibm.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Robert Richter <robert.richter@amd.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Venkatesh Pallipadi <venki@google.com> Acked-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 27 9月, 2012 1 次提交
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由 Al Viro 提交于
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>
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- 21 5月, 2012 1 次提交
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由 Takashi Iwai 提交于
The handling for some PCM states is missing for snd_pcm_drain(). At least, XRUN streams should be simply dropped to SETUP, and a few initial invalid states should be rejected. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 15 3月, 2012 1 次提交
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由 Takashi Iwai 提交于
GFP_ATOMIC is used in snd_pcm_link() just because the kmalloc is called inside a lock. Since this function isn't too critical for speed and is rarely called in practice, better to allocate the chunk at first before spinlock and free it in error paths, so that GFP_KERNEL can be used. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 01 11月, 2011 1 次提交
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由 Paul Gortmaker 提交于
Lots of sound drivers were getting module.h via the implicit presence of it in <linux/device.h> but we are going to clean that up. So fix up those users now. Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
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- 10 10月, 2011 1 次提交
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由 Feng Tang 提交于
The rpcm_file parameter is never used in current ALSA code, so remove it to make it cleaner. Signed-off-by: NFeng Tang <feng.tang@intel.com> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 28 9月, 2011 1 次提交
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由 Takashi Iwai 提交于
Export the default mmap function, snd_pcm_lib_default_mmap(). The upcoming non-snooping support in HD-audio driver will use this to override the mmap method. Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 25 8月, 2011 1 次提交
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由 Jean Pihet 提交于
The PM QoS implementation files are better named kernel/power/qos.c and include/linux/pm_qos.h. The PM QoS support is compiled under the CONFIG_PM option. Signed-off-by: NJean Pihet <j-pihet@ti.com> Acked-by: Nmarkgross <markgross@thegnar.org> Reviewed-by: NKevin Hilman <khilman@ti.com> Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
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- 26 5月, 2011 2 次提交
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由 Luca Tettamanti 提交于
Drop a few variables that are never read. Signed-off-by: NLuca Tettamanti <kronos.it@gmail.com> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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由 Takashi Iwai 提交于
When the PCM period size is set larger than 10 seconds, currently the PCM core may abort the operation with DMA-error due to the fixed timeout for 10 seconds. A similar problem is seen in the drain operation that has a fixed timeout of 10 seconds, too. This patch fixes the timeout length depending on the period size and rate, also including the consideration of no_period_wakeup flag. Reported-by: NRaymond Yau <superquad.vortex2@gmail.com> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 31 3月, 2011 1 次提交
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由 Lucas De Marchi 提交于
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: NLucas De Marchi <lucas.demarchi@profusion.mobi>
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- 25 3月, 2011 1 次提交
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由 Benjamin Herrenschmidt 提交于
It's a big no-no to use pgprot_noncached() when mmap'ing such buffers into userspace since they are mapped cachable in kernel space. This can cause all sort of interesting things ranging from to garbled sound to lockups on various architectures. I've observed that usb-audio is broken on powerpc 4xx for example because of that. Also remove the now unused snd_pcm_lib_mmap_noncached(). It's an arch business to know when to use uncached mappings, there's already hacks for MIPS inside snd_pcm_default_mmap() and other archs are supposed to use dma_mmap_coherent(). (See my separate patch that adds dma_mmap_coherent() to powerpc) Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> CC: <stable@kernel.org> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 15 2月, 2011 1 次提交
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由 Clemens Ladisch 提交于
Change the core code where sparse complains. In most cases, this means just adding annotations to confirm that we indeed want to do the dirty things we're doing. Signed-off-by: NClemens Ladisch <clemens@ladisch.de> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 22 11月, 2010 1 次提交
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由 Clemens Ladisch 提交于
This patch allows to disable period interrupts which are not needed when the application relies on a system timer to wake-up and refill the ring buffer. The behavior of the driver is left unchanged, and interrupts are only disabled if the application requests this configuration. The behavior in case of underruns is slightly different, instead of being detected during the period interrupts the underruns are detected when the application calls snd_pcm_update_avail, which in turns forces a refresh of the hw pointer and shows the buffer is empty. More specifically this patch makes a lot of sense when PulseAudio relies on timer-based scheduling to access audio devices such as HDAudio or Intel SST. Disabling interrupts removes two unwanted wake-ups due to period elapsed events in low-power playback modes. It also simplifies PulseAudio voice modules used for speech calls. To quote Lennart "This patch looks very interesting and desirable. This is something have long been waiting for." Support for this in hardware drivers is optional. Signed-off-by: NPierre-Louis Bossart <pierre-louis.bossart@intel.com> Signed-off-by: NClemens Ladisch <clemens@ladisch.de> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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- 18 11月, 2010 1 次提交
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由 Arnd Bergmann 提交于
The big kernel lock has been removed from all these files at some point, leaving only the #include. Remove this too as a cleanup. Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 02 11月, 2010 1 次提交
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由 Uwe Kleine-König 提交于
"gadget", "through", "command", "maintain", "maintain", "controller", "address", "between", "initiali[zs]e", "instead", "function", "select", "already", "equal", "access", "management", "hierarchy", "registration", "interest", "relative", "memory", "offset", "already", Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: NJiri Kosina <jkosina@suse.cz>
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- 17 9月, 2010 1 次提交
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由 Takashi Iwai 提交于
The pm_qos_request isn't freed properly when OSS PCM emulation is used because it skips snd_pcm_hw_free() call but directly releases the stream. This resulted in Oops later. Tested-by: NSimon Kirby <sim@hostway.ca> Signed-off-by: NTakashi Iwai <tiwai@suse.de>
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