- 02 Jun, 2017 6 commits
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Takashi Iwai authored
Replace the copy and the silence ops with the new ops. The conversion is straightforward with standard helper functions, and now we can drop the bytes <-> frames conversions in callbacks. Reviewed-by:
Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by:
Takashi Iwai <tiwai@suse.de>
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Takashi Iwai authored
Replace the copy and the silence ops with the new PCM ops. Although we can refactor this messy code, at this time, the changes are kept as small as possible. Let's clean up later. Reviewed-by:
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Takashi Iwai authored
Replace the copy and the silence ops with the new ops. The conversion is straightforward with standard helper functions, and now we can drop the bytes <-> frames conversions in callbacks. Reviewed-by:
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Takashi Iwai authored
Replace the copy ops with the new copy_user and copy_kernel ops. It's used only for a capture stream (for some hardware workaround), thus we need no silence operation. Reviewed-by:
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Takashi Iwai authored
It's a dummy ops, so just replacing it. Reviewed-by:
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Takashi Iwai authored
For supporting the explicit in-kernel copy of PCM buffer data, and also for further code refactoring, three new PCM ops, copy_user, copy_kernel and fill_silence, are introduced. The old copy and silence ops will be deprecated and removed later once when all callers are converted. The copy_kernel ops is the new one, and it's supposed to transfer the PCM data from the given kernel buffer to the hardware ring-buffer (or vice-versa depending on the stream direction), while the copy_user ops is equivalent with the former copy ops, to transfer the data from the user-space buffer. The major difference of the new copy_* and fill_silence ops from the previous ops is that the new ops take bytes instead of frames for size and position arguments. It has two merits: first, it allows the callback implementation often simpler (just call directly memcpy() & co), and second, it may unify the implementations of both interleaved and non-interleaved cases, as we'll see in the later patch. As of this stage, copy_kernel ops isn't referred yet, but only copy_user is used. Reviewed-by:
Mark Brown <broonie@kernel.org> Signed-off-by:
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- 30 May, 2017 2 commits
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Colin Ian King authored
We need to include pcm_local.h to clean up some smatch warnings: symbol 'snd_pcm_timer_done' was not declared. Should it be static? symbol 'snd_pcm_timer_init' was not declared. Should it be static? symbol 'snd_pcm_timer_resolution_change' was not declared. Should it be static? Also remove some extraneous tabs on empty lines and replace space intentation with a tab. Signed-off-by:
Colin Ian King <colin.king@canonical.com> Signed-off-by:
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Bhumika Goyal authored
Declare snd_kcontrol_new structures as const as they are only passed an argument to the function snd_ctl_new1. This argument is of type const, so snd_kcontrol_new structures having this property can be made const. Done using Coccinelle: @r disable optional_qualifier@ identifier x; position p; @@ static struct snd_kcontrol_new x@p={...}; @ok@ identifier r.x; position p; @@ snd_ctl_new1(&x@p,...) @bad@ position p != {r.p,ok.p}; identifier r.x; @@ x@p @depends on !bad disable optional_qualifier@ identifier r.x; @@ +const struct snd_kcontrol_new x; Cross compiled these files: sound/aoa/codecs/tas.c - powerpc sound/mips/{hal2.c/sgio2audio.c} - mips sound/ppc/{awacs.c/beep.c/tumbler.c} - powerpc sound/soc/sh/siu_dai.c - sh Could not find an architecture to compile sound/sh/aica.c. Signed-off-by:Bhumika Goyal <bhumirks@gmail.com> Acked-by:
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- 26 May, 2017 1 commit
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Takashi Sakamoto authored
Several files are used to construct PCM core module, a.k.a snd-pcm. Although available APIs are described in 'include/sound/pcm.h', some of them are not exported as symbols in kernel space. Such APIs are just for module local usage. This commit adds module local header file and move some function prototypes into it so that scopes of them are controlled properly and developers get no confusion from unavailable symbols. Signed-off-by:
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- 25 May, 2017 7 commits
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Takashi Iwai authored
Although the ack callback is supposed to be called at each appl_ptr or hw_ptr update, we missed a few opportunities: namely, forward, rewind and sync_ptr. Formerly calling ack at rewind may have leaded to unexpected results due to the forgotten negative appl_ptr update in indirect-PCM helper, which is the major user of the PCM ack callback. But now we fixed this oversights, thus we can call ack callback safely even at rewind callback -- of course with the proper handling of the error from the callback. This patch adds the calls of ack callback in the places mentioned in the above. Signed-off-by: -
Takashi Iwai authored
Now that the indirect-PCM transfer helper gives back an error, we should return the error from ack callbacks. Acked-by:
Eric Anholt <eric@anholt.net> Signed-off-by:
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Takashi Iwai authored
Now that the indirect-PCM transfer helper gives back an error, we should return the error from ack callbacks. Signed-off-by: -
Takashi Iwai authored
Now that the indirect-PCM transfer helper gives back an error, we should return the error from ack callbacks. Signed-off-by: -
Takashi Iwai authored
Now that the indirect-PCM transfer helper gives back an error, we should return the error from ack callbacks. Signed-off-by: -
Takashi Iwai authored
Now that the indirect-PCM transfer helper gives back an error, we should return the error from ack callbacks. Signed-off-by: -
Takashi Iwai authored
The indirect-PCM helper codes have an implicit assumption that the appl_ptr always increases. But the PCM core may deal with the decrement of appl_ptr via rewind ioctls, and it may screw up the buffer pointer management. This patch adds the negative appl_ptr diff in transfer functions and let returning an error instead of always accepting the appl_ptr updates. The callers are usually PCM ack callbacks, and they pass the error to the upper layer accordingly. Signed-off-by:
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- 24 May, 2017 3 commits
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Takashi Sakamoto authored
In design of ALSA pcm core, 'struct snd_pcm_ops.copy' is expected to copy PCM frames, according to frame alignment on intermediate buffer for userspace and dedicated buffer for data transmission. In this callback, value of 'channel' argument depends on the frame alignment, which drivers registers to runtime of PCM substream. When target devices can handle non-interleaved buffer, this value has positive value, otherwise negative. ALSA driver for PCM component of EMU8000 chip is programmed with local macro to switch the frame alignment. The 'copy' operation in non-interleaved side has evaluation of the 'channel' argument (actually it's 'voice' argument). This is useless. This commit remove the evaluation. [tiwai: the negative channel argument was the inheritance from the old code where -1 was meant for interleaved mode. The mix-up was dropped meanwhile, thus it's correct to assume that we receive no longer -1 there, and it's safe to cleanup the relevant code. Also, voice=0 for channel==1 is trivial, and it can be dropped, too.] Signed-off-by:
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Takashi Sakamoto authored
ALSA driver series for devices of Gravis Ultra Sound includes local variable 'snd_gf1_pcm_use_dma'. Although this is a flag to change behaviours of local implementations for 'struct snd_pcm_ops.copy' and 'struct snd_pcm_ops.silence', it's invariable during module lifetime. This commit removes this local variable and the relevant operations. Signed-off-by:
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Takashi Sakamoto authored
In current implementation of ALSA control core, list operation has a limitation to handle 16384 entries at once. This seems due to allocation in kernel space to copy data from user space. With a commit 53e7bf45 ("ALSA: control: Simplify snd_ctl_elem_list() implementation"), for the operation, ALSA control core copies data into user space directly. No need to care of kernel spaces anymore. This commit purges the limitation. Signed-off-by:
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- 23 May, 2017 3 commits
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Takashi Iwai authored
We used to use kmalloc (more exactly, krealloc()) for creating and growing the temporary buffer for text proc write. It can grow up to 16kB, and it's already a bit doubtful whether it's always safe to use kmalloc(). With the recent addition of kvmalloc(), we can have a better chance for succeed of memory allocation, so let's switch to that new API. Signed-off-by: -
Takashi Iwai authored
PCM core code has a few usages of set_fs(), mostly for two codepaths: - The DELAY ioctl call from pcm_compat.c - The ioctl wrapper in kernel context for PCM OSS and other This patch removes the set_fs() usage in these places by a slight code refactoring. For the former point, snd_pcm_delay() is changed to return the value directly instead of putting the value to the given address. Each caller stores the result in an appropriate manner. For fixing the latter, snd_pcm_lib_kernel_ioctl() is changed to call the functions directly as well. For achieving it, now the function accepts only the limited set of ioctls that have been used, so far. The primary user of this function is the PCM OSS layer, and the only other user is USB UAC1 gadget driver. Both drivers don't need the full set of ioctls. Reviewed-by:
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Takashi Iwai authored
This patch simplifies the code of snd_ctl_elem_list() in the following ways: - Avoid a vmalloc() temporary buffer but do copy in each iteration; the vmalloc buffer was introduced at the time we took the spinlock for the ctl element management. - Use the standard list_for_each_entry() macro - Merge two loops into one; it used to be a loop for skipping until offset becomes zero and another loop to copy the data. They can be folded into a single loop easily. Reviewed-by:
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- 22 May, 2017 1 commit
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Takashi Sakamoto authored
In IEC 61883-6, AM824 is described as format of data block. In this format, one data block consists of several data channels, which is aligned to 32 bit. One data channel has 8 bit label field and 24 bit data field. PCM frames are transferred in Multi Bit Linear Audio (MBLA) data channel. This channel can include 16/20/24 bit PCM sample. As long as I know, models which support IEC 61883-1/6 doesn't allow to switch bit length of PCM sample in MBLA data channel. They always transmit/receive PCM frames of 24 bit length. This can be seen for the other models which support protocols similar to IEC 61883-1/6. On the other hand, current drivers for these protocols supports 16 bit length PCM sample in playback substream. In this case, PCM sample is put into the MBLA data channel with 8 bit padding in LSB side. Although 16 bit PCM sample is major because it's in CD format, this doesn't represent device capability as is. This commit removes support for 16 bit PCM samples in playback substream. Signed-off-by:
Clemens Ladisch <clemens@ladisch.de> Signed-off-by:
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- 21 May, 2017 6 commits
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Bhumika Goyal authored
Declare snd_kcontrol_new structures as const as they are only passed an argument to the function snd_ctl_new1. This argument is of type const, so snd_kcontrol_new structures having this property can be made const. Done using Coccinelle: @r disable optional_qualifier@ identifier x; position p; @@ static struct snd_kcontrol_new x@p={...}; @ok@ identifier r.x; position p; @@ snd_ctl_new1(&x@p,...) @bad@ position p != {r.p,ok.p}; identifier r.x; @@ x@p @depends on !bad disable optional_qualifier@ identifier r.x; @@ +const struct snd_kcontrol_new x; Signed-off-by: -
Bhumika Goyal authored
Declare snd_kcontrol_new structures as const as they are only passed an argument to the function snd_ctl_new1. This argument is of type const, so snd_kcontrol_new structures having this property can be made const. Done using Coccinelle: @r disable optional_qualifier@ identifier x; position p; @@ static struct snd_kcontrol_new x@p={...}; @ok@ identifier r.x; position p; @@ snd_ctl_new1(&x@p,...) @bad@ position p != {r.p,ok.p}; identifier r.x; @@ x@p @depends on !bad disable optional_qualifier@ identifier r.x; @@ +const struct snd_kcontrol_new x; Signed-off-by: -
Bhumika Goyal authored
Declare snd_kcontrol_new structures as const as they are only passed an argument to the function snd_ctl_new1. This argument is of type const, so snd_kcontrol_new structures having this property can be made const. Done using Coccinelle: @r disable optional_qualifier@ identifier x; position p; @@ static struct snd_kcontrol_new x@p={...}; @ok@ identifier r.x; position p; @@ snd_ctl_new1(&x@p,...) @bad@ position p != {r.p,ok.p}; identifier r.x; @@ x@p @depends on !bad disable optional_qualifier@ identifier r.x; @@ +const struct snd_kcontrol_new x; Signed-off-by: -
Bhumika Goyal authored
Declare snd_kcontrol_new structures as const as they are only passed an argument to the function snd_ctl_new1. This argument is of type const, so snd_kcontrol_new structures having this property can be made const. Done using Coccinelle: @r disable optional_qualifier@ identifier x; position p; @@ static struct snd_kcontrol_new x@p={...}; @ok@ identifier r.x; position p; @@ snd_ctl_new1(&x@p,...) @bad@ position p != {r.p,ok.p}; identifier r.x; @@ x@p @depends on !bad disable optional_qualifier@ identifier r.x; @@ +const struct snd_kcontrol_new x; Signed-off-by: -
Takashi Iwai authored
Factor out the common codes in snd_pcm_*_forward() and *_rewind() functions to simplify the codes. No functional changes. Reviewd-by:
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Takashi Iwai authored
The mostly same codes for checking the current PCM state and calling hwsync are found in a few places. This patch simplifies them by creating a common helper function. It also fixes a couple of cases where we missed the proper state check (e.g. PAUSED state wasn't handled in rewind and snd_pcm_hwsync()), too. Reviewed-by:
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- 18 May, 2017 2 commits
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Arnd Bergmann authored
Only one of the two declarations has the const modifier in the argument list, so we get a warning when CONFIG_SND_PCM_OSS_PLUGINS is disabled: sound/core/oss/pcm_oss.c: In function 'snd_pcm_oss_change_params': sound/core/oss/pcm_oss.c:898:47: error: passing argument 2 of 'snd_pcm_plug_slave_format' discards 'const' qualifier from pointer target type [-Werror=discarded-qualifiers] This makes the two declarations match again. Fixes: e76bf3c4 ("ALSA: pcm/oss: refer to parameters instead of copying to reduce usage of kernel stack") Signed-off-by:
Arnd Bergmann <arnd@arndb.de> Reviewed-by:
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Arnd Bergmann authored
Recent compilers produce a harmless warning for the new pcm_call_notify() macro when CONFIG_SND_PCM_OSS is disabled: sound/core/pcm.c: In function 'snd_pcm_free': sound/core/pcm.c:905:37: error: suggest braces around empty body in an 'if' statement [-Werror=empty-body] This turns the empty macro into a 'do {} while (0)' statement to avoid the warning. Fixes: 58f30d65 ("ALSA: pcm: Build pcm notifier code conditionally") Signed-off-by:
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- 17 May, 2017 9 commits
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Takashi Sakamoto authored
In a function snd_pcm_hw_params_choose(), target parameters are arranged into a table. Though each entry of this table is read-only, they don't have const qualifier. This commit adds the qualifier. Signed-off-by:
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Takashi Sakamoto authored
Some functions in compatibility layer for Open Sound System interface has local variable to copy some parameters in runtime of PCM substream, while this can be replaced with reference of pointers to parameter itself. This brings an advantage to reduce usage of kernel stack. This commit applies this idea. Signed-off-by:
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Takashi Sakamoto authored
ALSA pcm core has hw_param_interval_c() to pick up parameter with const qualifier for safe programming. This commit applies it to the cases. Signed-off-by:
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Takashi Sakamoto authored
There's a read-only table for each sampling rate, while it doesn't have const qualifier and can be modified. This commit add the qualifier. As a result, a symbol for the table moves from .data section to .rodata. Signed-off-by:
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Takashi Iwai authored
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Takashi Iwai authored
By some reason in the ancient history, we disabled the build of ALSA drivers for m68k. Since we'd like to move sound/oss/dmasound stuff into ALSA for the complete drop of the legacy OSS stuff, let's try to start building with m68k. Signed-off-by: -
Takashi Iwai authored
Instead of set_fs() hackery, do the straight memcpy() by passing a flag indicating the kernel space operation. Reviewed-by:
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Takashi Iwai authored
snd_enter_user() and snd_leave_user() that call set_fs() are the dead code in opl3 driver. Let's rip them off. Reviewed-by:
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Takashi Iwai authored
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