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2015-11-18ASoC: Intel: Skylake: Add I2C depends for SKL machineVinod Koul
The i2c is dependency for the i2c codec drivers, so machine should depend on i2c. WIthout this we get build failures if I2C is not selected sound/soc/codecs/rl6347a.c: In function 'rl6347a_hw_write': >> sound/soc/codecs/rl6347a.c:66:8: error: implicit declaration of function >> 'i2c_master_send' [-Werror=implicit-function-declaration] ret = i2c_master_send(client, data, 4); ^ sound/soc/codecs/rl6347a.c: In function 'rl6347a_hw_read': >> sound/soc/codecs/rl6347a.c:114:8: error: implicit declaration of function >> 'i2c_transfer' [-Werror=implicit-function-declaration] ret = i2c_transfer(client->adapter, xfer, 2); Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: constify sst_block_ops structuresJulia Lawall
The sst_block_ops structure is never modified, and is thus declared as const. Done with the help of Coccinelle. Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Jie Yang <yang.jie@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Use the fw name from ACPI mach tableVinod Koul
The firmware name is hard coded which doesnt allow to load different platforms for various platforms so get this name from available machine table and pass it to dsp context for loading Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: add fw name to common dsp contextVinod Koul
In order to pass the fw name to IPC driver for loading fw, we need to add a memeber to store the fw name Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix skl machine driver creationVinod Koul
Now that we have common match code in place, update the SKL driver to use the common match routines for driver entry creation for UEFI BIOS systems Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Omair M Abdullah <omair.m.abdullah@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Atom: move atom driver to common acpi matchVinod Koul
This patch moves the atom driver to use the common acpi match functions. Since atom driver has few more information in machine table, these are appended to table and set to NULL for common driver Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Move apci find machine routinesVinod Koul
This code to find the machine is common for all drivers so move it to a separate file and header for use in other drivers Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix resource cleanup on teardownVinod Koul
MCPS free was being done from PGA context which will free up MCPS for only last modules in a pipe and not the rest causing MCPS leak and eventual audio loss due to no "free" MCPS. This needs to be freed for every module while cleaning up the modules, so move the check to skl_tplg_mixer_dapm_post_pmd_event() Signed-off-by: Mohan Krishna Velaga <mohan.krishnax.velaga@intel.com> Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix substream dereference before checkVinod Koul
Smatch warns that we dereferenced substream before check, so fix this by initializing ebus after the check sound/soc/intel/skylake/skl-pcm.c:802 skl_get_position() warn: variable dereferenced before check 'substream->runtime' Reported by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix to cleanup if skl_sst_dsp_init failsSubhransu S. Prusty
This patch fixes the below warning reported by Dan by invoking skl_sst_dsp_cleanup() in cleanup path on error and not bailing out sound/soc/intel/skylake/skl-sst.c:270 skl_sst_dsp_init() info: ignoring unreachable code. Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: fix typo in sizeofVincent Stehlé
The size of the pointer to a data structure to send is erroneously passed to sst_ipc_tx_message_wait() as its tx_bytes argument. It should be given the size of the pointed skl_ipc_dxstate_info structure instead. Coincidentally, both the pointer and the structure have the same size of 8 bytes on a 64 bit machine, which "masks" the issue. Compiling for 32 bit reveals the issue more clearly. Fix the typo for correctness, and to make the code robust to future evolutions of the skl_ipc_dxstate_info structure size. This fixes the following coccicheck error: sound/soc/intel/skylake/skl-sst-ipc.c:641:8-14: ERROR: application of sizeof to pointer Signed-off-by: Vincent Stehlé <vincent.stehle@laposte.net> Cc: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Cc: Jeeja KP <jeeja.kp@intel.com> Cc: Vinod Koul <vinod.koul@intel.com> Cc: Mark Brown <broonie@kernel.org> Cc: trivial@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix the SSP0 Fmt fixup to 24 bitJeeja KP
SSP0 FMT uses 24 bits so fix to the value to 24 bits Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix PM behaviourJeeja KP
The driver runtime behaviour is fine but in suspend, we missed setting the DSP to suspend and also missed resuming DSP on resume. Fix this by having common SKL suspend and resume routines which power up/down links, suspend/resume DSP and other common routines, and call these routines from both runtime as well as system PM handlers Signed-off-by: Jayachandran B <jayachandran.b@intel.com> Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix to remove channel_map calculationJeeja KP
Widget FW topology private data already has the information on the channel map, ch_cfg and interleaving. This patch removes the calculation of channel_map in driver and reads the value directly from widget private data. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Ignore rate check for DMIC linkJeeja KP
DMIC NHLT entry is sample rate agnostic, so ignore the rate checks for DMIC type Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Add support for module GUIDsHardik T Shah
The DSP FW specifies loadable modules using GUIDs so add support to specify the GUIDs from topology Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com> Signed-off-by: Omair M Abdullah <omair.m.abdullah@intel.com> Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Update the topology interface structureHardik T Shah
This patch updates the topology interface structure alignment and also updates the Sample interleaving defines Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com> Signed-off-by: Omair M Abdullah <omair.m.abdullah@intel.com> Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Add multiple pin formatsHardik T Shah
The module pin formats are considered homogeneous, but some modules can have different pcm formats on different pins, like reference signal for a module. This patch add support for configuration of each pin of module and allows us to specify if pins and homogeneous or heterogeneous Signed-off-by: Hardik T Shah <hardik.t.shah@intel.com> Signed-off-by: Omair M Abdullah <omair.m.abdullah@intel.com> Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix to remove be copier widget power checkJeeja KP
ASoC core already checks if BE is active. If BE is active, hw_params callback is ignored. This patch removes the redundant check in driver for copier widget power check in update be hw_params. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix DSP pipe underrun/overrun issueJeeja KP
While rigourous testing of SKL drivers, we noticed underuns and overuns and on debug realized that we need to change driver handling of FE pipe startup and shutdown We need to start DMA and then run pipe together and not split these up. Similarly while stopping we should stop pipe and then DMA in a sequence. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Add support for virtual dsp widgetsJeeja KP
In SKL topology routes, some paths can be connected by a widget which are not a DSP FW widget and virtual with respect to firmware. In these case when module has to bind, then the virtual DSP modules needs to skipped till a actual DSP module is found which connects the pipelines. So we need to walk the graph and find a widget which is real in nature. This patch adds that support and splits skl_tplg_pga_dapm_pre_pmu_event() fn with parsing code to skl_tplg_bind_sinks() fn and call that recursively as well as while parsing The patch moves code a bit while splitting so diffstat doesn't tell real picture Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: use module_pin info for unbindJeeja KP
in_pin and out_pin list for a module has the information about the module that are bound together. So we can directly look at pin information of module for binding and unbind. As a result the preinitialized dapm_path_last we had is removed and code and memory optimzed. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix bit depth when querying the NHLT blobJeeja KP
Bps calculation is not correct as this needs to be based on valid bit depth. 16 bit fmt bit depth is 16 bit and for 24 and 32 bit as it is container size This patch fixes the bps. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix support for multiple pins in a moduleJeeja KP
For supporting multiple dynamic pins, module state check is incorrect. In case of unbind, module state need to be changed to uninit if all pins in the module is is unbind state. To handle module state correctly add pin state and use pin state check to set module state correctly. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix to ignore blob check if link type is HDAJeeja KP
If link type is HDA, NHLT blob is null, as NHLT defines non HDA links only. So we should ignore blob query for HDA links. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix to ignore codec_mask check in probeJeeja KP
We have both I2S and hda codec support in the driver. codec_mask check is relevant only for hda codec and some boards may have only I2S Codec, so removed probe error in case no hda codec is found and update the log to info as it may not be error. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix to add 32 bit in update FE paramsJeeja KP
In case of 32 bit, the FE update params returns error as it falls thru to default case. This patch adds 32 bit depth handling in update FE params. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix not to ignore return value in be hw_paramsJeeja KP
Return value from skl_tplg_be_update_params() is ignored. But if the blob is null then the hw_params needs to return error. This patch fixes the issue by not ignoring return value from skl_tplg_be_update_params(). Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-11-16ASoC: Intel: Skylake: Fix to correct check for non DSP widgetJeeja KP
To get the FE copier module, the check to ignore non DSP widgets was wrong. This path corrects the check to ignore non DSP widget. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-26Merge tag 'asoc-v4.3-rc6' of ↵Takashi Iwai
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-next ASoC: Updates for v4.4 Not much core work here, a few small tweaks to interfaces but mainly the changes here are driver ones. Highlights include: - Updates to the topology userspace interface - Big updates to the Renesas support from Morimoto-san - Most of the support for Intel Sky Lake systems. - New drivers for Asahi Kasei Microdevices AK4613, Allwinnner A10, Cirrus Logic WM8998, Dialog DA7219, Nuvoton NAU8825 and Rockchip S/PDIF. - A new driver for the Atmel Class D speaker drivers
2015-10-26Merge remote-tracking branches 'asoc/topic/imx' and 'asoc/topic/intel' into ↵Mark Brown
asoc-next
2015-10-26Merge remote-tracking branch 'asoc/topic/core' into asoc-nextMark Brown
2015-10-24ASoC: Intel: Skylake: Add support to topology for module static pinJeeja KP
Some module pin connection are static and defined by the topology. This patch adds support for static pin definitions in topology widget private data Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-24ASoC: Intel: Skylake: Fix to set Non gateway copier cfgJeeja KP
If copier instance is connected to a DMA gateway then driver needs to configure the gateway configuration otherwise set it to invalid. This patch sets the non gateway copier node value to invalid. Signed-off-by: Dharageswari.R <dharageswari.r@intel.com> Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-24ASoC: Intel: Skylake: Fix to check return value of dsp initJeeja KP
If DSP initialization fails, ipc to disable notification will cause NULL ptr exception as ipc is not initialized. This patch returns error if dsp init fails before sending disable notification ipc. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-24ASoC: Intel: Skylake: Add support to disable module notificationsJeeja KP
Each FW modules can report underrun/overrun notification from all modules. This patch disables underrun/overrun notification after firmware is loaded. This will be supportted for debug mode only thru debugfs Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-24ASoC: Intel: Skylake: Update for ssp node index in copier cfgJeeja KP
DSP firmware has interface change for SSP node index structure. New FW interface removes the dual_mono field and adds 4 bits for TDM slot group index. This patch updates the ssp dma to align with the DSP firmware structure. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-24ASoC: Intel: Skylake: Fix to fill all sink/source pipe paramsSubhransu S. Prusty
Currently params only for first copier widget identified in the source/sink path is queried from NHLT. In the dapm route the playback/capture widget may be connected to more than one copier widget. This patch adds return check to return only for any error case. Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-24ASoC: Intel: Skylake: Fix to use correct macros for the path iterationSubhransu S. Prusty
In case of playback, for the BE dai source path should be iterated to find the pipe params. With sink path iterated, this resulted in a loop and kernel panic with page request failure. Similar are the cases for Capture and FE dais. Using correct macros to fix the panic Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-24ASoC: Intel: Skylake: Remove BE copier blob memcpyJeeja KP
The BE copier private data allowed endpoint configuration blobs, now these are queried from BIOS, we don't need to copy the blob, but only capability. Removing the blob from private data will not allocate memory for module specific config in which case memcpy will fail. Fix is to assign the ptr queried from the NHLT table for the endpoint configuration. Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-24ASoC: Intel: Skylake: Fix return for pm_runtime_get_sync()Jeeja KP
pm_runtime_get_sync() will return a negative value in case of error and can return postive value for success. The return check for pm_runtime_get_sync() must be less than 0, so fix it Signed-off-by: Jeeja KP <jeeja.kp@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-23Merge branch 'topic/hw-constraint-single' into for-nextTakashi Iwai
2015-10-23ASoC: Intel: Skylake: Convert to devm_snd_soc_register_cardAxel Lin
Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-22ASoC: Intel: switch from ioremap_cache to memremapDan Williams
In preparation for deprecating ioremap_cache() convert its usage in skl-nhlt to memremap. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-22ASoC: Intel: sst: only use sst-firmware when DW DMAC is availableJie Yang
Currentlly, we use Synopsys DesignWare DMA Controller for baytrail/haswell/broadwell ADSP firmware loading, but for skylake, we don't use it, compiling sst-firmware.c may introduce error when CONFIG_DW_DMAC_CORE is not enabled: sound/built-in.o: In function `sst_dma_new': (.text+0xd7b38): undefined reference to `dw_dma_probe' sound/built-in.o: In function `sst_dma_free': (.text+0xd7c0a): undefined reference to `dw_dma_remove' Here we only compile sst-firmware when CONFIG_DW_DMAC_CORE is selected, to fix the linking error issue. Reported-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jie Yang <yang.jie@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-22ASoC: compress: add config item for soc-compress to make it compiled only ↵Jie Yang
when needed We don't always need soc-compress in soc, here add a config item SND_SOC_COMPRESS, when nobody select it, the soc-compress will not be compiled. Here also change Kconfig to 'select SND_SOC_COMPRESS' for drivers that needed soc-compress. Signed-off-by: Jie Yang <yang.jie@intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2015-10-21ASoC: cht_bsw_rt5672: Use snd_pcm_hw_constraint_single()Lars-Peter Clausen
Use the new snd_pcm_hw_constraint_single() helper function rather than installing a list constraint with a single value. Since snd_pcm_hw_constraint_single() sets a static constraint while snd_pcm_hw_constraint_list() sets a dynamic constraint the former is slightly more efficient and it also needs less code. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Vinod Koul <vinod.koul@intel.com> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-21ASoC: cht_bsw_rt5645: Use snd_pcm_hw_constraint_single()Lars-Peter Clausen
Use the new snd_pcm_hw_constraint_single() helper function rather than installing a list constraint with a single value. Since snd_pcm_hw_constraint_single() sets a static constraint while snd_pcm_hw_constraint_list() sets a dynamic constraint the former is slightly more efficient and it also needs less code. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Vinod Koul <vinod.koul@intel.com> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-21ASoC: cht_bsw_max98090: Use snd_pcm_hw_constraint_single()Lars-Peter Clausen
Use the new snd_pcm_hw_constraint_single() helper function rather than installing a list constraint with a single value. Since snd_pcm_hw_constraint_single() sets a static constraint while snd_pcm_hw_constraint_list() sets a dynamic constraint the former is slightly more efficient and it also needs less code. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Vinod Koul <vinod.koul@intel.com> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-10-21ASoC: bytcr_rt5640: Use snd_pcm_hw_constraint_single()Lars-Peter Clausen
Use the new snd_pcm_hw_constraint_single() helper function rather than installing a list constraint with a single value. Since snd_pcm_hw_constraint_single() sets a static constraint while snd_pcm_hw_constraint_list() sets a dynamic constraint the former is slightly more efficient and it also needs less code. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Vinod Koul <vinod.koul@intel.com> Acked-by: Mark Brown <broonie@kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>