Commit Graph

21252 Commits

Author SHA1 Message Date
Takashi Iwai
12cddbd869 ALSA: control: Add missing kerneldoc comments to exported functions
A few functions have no proper documentation yet, so let's add them.
Along with it, remove superfluous blank line between the closing brace
and EXPORT_SYMBOL() line.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-30 13:44:34 +01:00
Mauro Carvalho Chehab
678fa12fb8 [media] sound: Update au0828 quirks table
The au0828 quirks table is currently not in sync with the au0828
media driver.

Syncronize it and put them on the same order as found at au0828
driver, as all the au0828 devices with analog TV need the
same quirks.

Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2014-10-30 09:24:20 -02:00
Mauro Carvalho Chehab
5d1f00a20d [media] sound: simplify au0828 quirk table
Add a macro to simplify au0828 quirk table. That makes easier
to check it against the USB IDs at drivers/media/usb/au0828/au0828-cards.c.

Cc: stable@vger.kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2014-10-30 09:23:57 -02:00
Takashi Iwai
dda42bd0c3 ALSA: hda - Add kerneldoc comments to hda_generic.c
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-30 12:04:50 +01:00
Kailang Yang
1df8874bfa ALSA: hda/realtek - Update Initial AMP for EAPD control
The default EAPD control uses verb command to control EAPD. Some codec
does not have verb command for EAPD. It needs to control by hidden
register.

This update will avoid wrong behavior for some codec.  This patch will
fix double setup for EAPD.  It just needs to turn on by one site for
verb command or hidden register controlled.

Detailed changes:
- alc889_coef_init() is replaced with alc_update_coef_idx() with a
  correct COEF value.
- for ALC262, ALC887 and ALC900, the EAPD setup via the hidden
  register is removed because this rather conflicts with the EAPD verb
  setup.
-  For ALC888-VC, also the hidden register access is removed in
  alc888_coef_init().
- Remove the dead #if 0 code for ALC267/ALC268.

Signed-off-by: Kailang Yang <kailang@realtek.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-30 09:01:17 +01:00
David Henningsson
cf51eb9d0c ALSA: hda - change three SSID quirks to one pin quirk
These three HP machines all have the same pin config, so we can
change it to a pin quirk.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-30 08:59:53 +01:00
David Henningsson
7a5255f17d ALSA: hda - Set GPIO 4 low for a few HP machines
These HP machines needs GPIO 4 low to enable the headphone amplifier.
In addition, we still need to control LEDs via vref and GPIO.

Cc: stable@vger.kernel.org
BugLink: https://bugs.launchpad.net/bugs/1387128
Tested-by: TienFu Chen <tienfu.chen@canonical.com>
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-30 08:59:52 +01:00
Takashi Iwai
ce40a6d3ad Merge branch 'topic/kerneldoc' into for-next 2014-10-30 08:05:12 +01:00
Tina Ruchandani
eafe8404c1 ALSA: es1968: Replace timeval with ktime_t
es1968_measure_clock uses struct timeval, which on 32-bit systems will overflow
in 2038, leading to incorrect interpretation of time.This patch changes the
function to use ktime_t instead of struct timeval, which implies:
- no y2038: ktime_t uses a 64-bit datatype explicitly.
- efficent subtraction: The earlier version computes the difference in usecs
  while dealing with secs and nsecs. It requires checks to see if the nsecs of
  stop is less than start. This patch uses a direct subtract of ktime_t and
  converts to usecs.
- use of monotonic clock (ktime_get) over real time (do_gettimeofday),
  which simplifies timekeeping, as it does not have to deal with cases
  where stop_time is less than start_time.

Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-30 08:04:33 +01:00
Lukas Bossard
7c21539c45 ALSA: hda - Add ultra dock support for Thinkpad X240.
Adding ultra doch support for Lenovo Thinkpad X240 (17aa:2214).
[Actually replaced the entry with ALC292_FIXUP_TPT440_DOCK -- tiwai]

Signed-off-by: Lukas Bossard <mr.bobukas@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-30 08:03:29 +01:00
Lars-Peter Clausen
1ffae3612f ASoC: Fix snd_soc_find_dai() matching component by name
Commit 14621c7e5e ("ASoC: Consolidate CPU and CODEC DAI lookup")
consolidated the lookup of CPU DAIs and CODEC DAIs into a single function.
When matching a component by name for CODEC DAIs the code previous to the
patch compared the name in the DAI link table with component->name. For CPU
DAIs the code compared to dev_name(component->dev). The newly introduced
function ended up using the later as well.

For most components dev_name(component->dev) and component->name are the
same. The main notable exception are I2C devices where the driver name and
the device name are concatenated to form the component name. By using
dev_name(component->dev) instead of component->name the patch broke the
matching of I2C CODECs by name.

This patch restores the original behavior by using component->name instead
of dev_name(component->dev). This will be safe even for CPU DAIs since for
CPU DAIs both are the same.

Fixes: 14621c7e5e ("ASoC: Consolidate CPU and CODEC DAI lookup")
Reported-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 20:51:30 +00:00
Liam Girdwood
2e4f75919e ASoC: Intel: Add PM support to HSW/BDW PCM driver
Add PM and RTD3 support to the HSW/BDW PCM driver. The PCM driver will
now save DSP context and then power off the DSP when it's not in use.
DSP power and context is then restored when it's next used.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 20:50:42 +00:00
Liam Girdwood
aed3c7b77c ASoC: Intel: Add PM support to HSW/BDW IPC driver
Add PM and RTD3 support to the HSW/BDW IPC driver. This patch
saves and restores the DSP context, loads and unloads FW and drops
any pending IPC messages after suspend.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 20:50:42 +00:00
Liam Girdwood
6b7b4b8941 ASoC: Intel: Add PM support to the HSW/BDW DSP core.
Add support for PM wake, sleep and stall calls to the core HSW/BDW driver.
This includes reworking the reset and boot code and adding new calls
for setting D3/D0 state.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 20:50:42 +00:00
Liam Girdwood
d96c53a193 ASoC: Intel: Add generic support for DSP wake, sleep and stall
Add generic functions to support DSP sleep, wake and stall.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 16:56:55 +00:00
kbuild test robot
137f6d541a ASoC: Intel: dw_pdata can be static
sound/soc/intel/sst-firmware.c:172:29: sparse: symbol 'dw_pdata' was not declared. Should it be static?

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 16:56:55 +00:00
Takashi Iwai
3b70bdba2f ALSA: hda - Add workaround for CMI8888 snoop behavior
CMI8888 shows the stuttering playback when the snooping is disabled
on the audio buffer.  Meanwhile, we've got reports that CORB/RIRB
doesn't work in the snooped mode.  So, as a compromise, disable the
snoop only for CORB/RIRB and enable the snoop for the stream buffers.

The resultant patch became a bit ugly, unfortunately, but we still can
live with it.

Reported-and-tested-by: Geoffrey McRae <geoff@spacevs.com>
Cc: <stable@vger.kernel.org> # 3.17+
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-29 16:16:29 +01:00
Sudip Mukherjee
df57de172a ALSA: hdspm: remove unused variable
removed the unused variables. These variables were only being
assigned some value, but the values were never being used.

it has been build tested after removing the variables.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-29 16:12:32 +01:00
Takashi Iwai
95a962c36f ALSA: hda - More kerneldoc comments
Put more kerneldoc comments to the exported functions.
Still the generic parser code and the HD-audio controller code aren't
covered yet, though.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-29 16:03:58 +01:00
Takashi Iwai
a11e9b1686 ALSA: hda - Correct kerneldoc comments
Complete the missing parameters and fix anything wrong there.
Just comment changes.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-29 15:06:54 +01:00
Peter Ujfalusi
bb372af0f7 ASoC: davinci-mcasp: Move the AFIFO related code under start_tx/rx functions
In this way the start code for tx/rx going to be located at the same place.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 12:32:14 +00:00
Peter Ujfalusi
0380866a91 ASoC: davinci-mcasp: When stopping TX/RX stop the AFIFO as the last step
The AFIFO should not be stopped (or started for that matter) when McASP is
running since it can cause unpredictable issues because we are switching off
AFIFO for the direction which was handling the requests from McASP and was
generating DMA request toward the system DMA.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 12:31:38 +00:00
Peter Ujfalusi
4498273551 ASoC: davinci-mcasp: Correct RX start sequence
Follow the sequence described in the TRMs when starting RX.
Write to RXBUF register was not correct and there is no need to release the
RX state machine/Receive frame sync generator twice.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 12:31:38 +00:00
Peter Ujfalusi
36bcecd0a7 ASoC: davinci-mcasp: Correct TX start sequence
Follow the sequence described in the TRMs when starting TX. This sequence
will make sure that we are not facing with initial channel swap caused by
no data available in McASP for transmit.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 12:31:38 +00:00
Mark Brown
7077148fb5 ASoC: core: Split ops out of soc-core.c
The main ASoC source file is getting quite large and the standard ops don't
really have anything to do with the rest of the file so split them out into
a separate file.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 11:15:10 +00:00
Kuninori Morimoto
706c66213e ASoC: rsnd: remove unsupported PAUSE flag
R-Car sound doesn't support PAUSE.
Remove SNDRV_PCM_INFO_PAUSE flags from snd_pcm_hardware info

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-10-29 11:02:50 +00:00
Kuninori Morimoto
c1b9b9b1ad ASoC: fsi: remove unsupported PAUSE flag
FSI doesn't support PAUSE.
Remove SNDRV_PCM_INFO_PAUSE flags from snd_pcm_hardware info

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-10-29 11:02:43 +00:00
Fang, Yang A
df078d291d ASoC: rt5645: Mark RT5645_TDM_CTRL_3 as readable
amixer query fails due to it is not readable reigster

Signed-off-by: Fang, Yang A <yang.a.fang@intel.com>
Acked-by: Bard Liao <bardliao@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 10:58:13 +00:00
Mark Brown
63ae1fe773 ASoC: Intel: Add dependency on DesignWare DMA controller
We have calls into the controller so we need to ensure it is being
built.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-29 10:33:31 +00:00
Jianqun
29f95bd76f ASoC: rockchip-i2s: fix infinite loop in rockchip_snd_rxctrl
We can get into an infinite loop if the I2S_CLR register fails to
clear due to a missing break statement, so add that.

Signed-off-by: Jianqun <jay.xu@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-10-29 10:17:25 +00:00
Oder Chiou
e6f6ebc1f8 ASoC: rt5677: Add TDM channel mapping function
It is for channel to slot mapping, and it is not only for 8 channels mapping,
but also in 2, 4 and 6 channels mapping. If we want to use the 2 channels in
the stereo2 adc path, we need to set the item "2/1/3/4" or "2/3/1/4".

It also adds for stereo channel swap. It can map the sterero channels "L/R"
to "R/L", "L/L" or R/R.

Signed-off-by: Oder Chiou <oder_chiou@realtek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 22:52:21 +00:00
Thomas Petazzoni
4e44923847 ASoC: cs42l51: make driver user-selectable
Since we are removing the Armada 370 DB audio machine driver to use
the 'simple-card' Device Tree binding, we can no longer select the
CS42L51 codec driver using a Kconfig 'select', and we instead need it
to be user-selectable. Therefore, this commit adds a prompt to make
the CS42L51 I2C codec driver user-selectable.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 22:34:13 +00:00
Liam Girdwood
e9600bc166 ASoC: Intel: Make ADSP memory block allocation more generic
Current block allocation is tied to block type and requestor type. Make the
allocation more generic by removing the struct module parameter and adding
a generic block allocator structure. Also pass in the list that the blocks
have to be added too in order to remove dependence on block requestor type.

ASoC: Intel: update scratch allocator to use generic block allocator

Update the scratch allocator to use the generic block allocator and calculate
total scratch buffer size.

ASoC: Intel: Add call to calculate offsets internally within the DSP.

A call to calculate internal DSP memory addresses used to allocate persistent
and scartch buffers.

ASoC: Intel: Add runtime module support.

Add support for runtime module objects that can be created for every FW
module that is parsed from the FW file. This gives a 1:N mapping between
the FW module from file and the runtime instantiations of that module.

We also need to make sure we remove every module and runtime module when
we unload the FW.

ASoC: Intel: Add DMA firmware loading support

Add support for DMA to load firmware modules to the DSP memory blocks.
Two DMA engines are supported, DesignWare and Intel MID.

ASoC: Intel: Add runtime module lookup API call

Add an API to allow quick lookup of runtime modules based on ID.

ASoC: Intel: Provide streams with dynamic module information

Remove the hard coded module paramaters and provide each module with
dynamically generated buffer information for scratch and persistent
buffers.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 22:25:02 +00:00
Takashi Iwai
f994cb3a09 ALSA: au88x0: Kill the rest snd_print*()
Use the standard dev_*() instead.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-28 17:40:45 +01:00
Takashi Iwai
f48a6df282 ALSA: pcxhr: Kill the rest snd_print*()
Use the standard dev_*() instead.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-28 17:40:43 +01:00
Takashi Iwai
2e6705c090 ALSA: ctxfi: Kill the rest snd_print*()
Use the standard dev_*() instead.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-28 17:40:42 +01:00
Kuninori Morimoto
1b5721b243 ASoC: simple-card: add asoc_simple_card_parse_daifmt()
Current daifmt setting method in simple-card driver is
placed to many places, and using un-readable/confusable method.
This patch adds new asoc_simple_card_parse_daifmt()
and tidyup code.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 16:35:51 +00:00
Nicolin Chen
41282920aa ASoC: fsl-asoc-card: Don't bypass settings if cpu-dai is Master
When cpu-dai is the DAI Master (CBM_CFx), it may need some configurations,
set_sysclk() call for eample, for cpu-dai side in the hw_params(), even if
the set_bias_level() has already taken care of the codec-dai side.

So this patch just simply adds an additional condition.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 16:05:04 +00:00
Aya Mahfouz
326f0480b7 ALSA: pcxhr: convert timeval to ktime_t
This patch is concerned with migrating the time variables in the pcxhr
module found in the sound driver. The changes are concerend with the
y2038 problem where timeval will overflow in the year 2038. ktime_t
was used instead of timeval to get the wall time. The difference
is displayed now in nanoseconds instead of microseconds.

Signed-off-by: Aya Mahfouz <mahfouz.saif.elyazal@gmail.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-28 15:07:25 +01:00
Takashi Iwai
317168d0c7 ALSA: pcm: Zero-clear reserved fields of PCM status ioctl in compat mode
In compat mode, we copy each field of snd_pcm_status struct but don't
touch the reserved fields, and this leaves uninitialized values
there.  Meanwhile the native ioctl does zero-clear the whole
structure, so we should follow the same rule in compat mode, too.

Reported-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2014-10-28 12:45:53 +01:00
Axel Lin
b2a9a3b818 ASoC: es8328-i2c: Fix i2c_device_id name field in es8328_id
The convention for i2c_device_id name does not need to have company prefix.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 10:48:03 +00:00
Fabio Estevam
cea82d8af3 ASoC: wm8731: Use the preferred form for passing a size of a struct
According to Documentation/CodingStyle - Chapter 14:

"The preferred form for passing a size of a struct is the following:

	p = kmalloc(sizeof(*p), ...);

The alternative form where struct name is spelled out hurts readability and
introduces an opportunity for a bug when the pointer variable type is changed
but the corresponding sizeof that is passed to a memory allocator is not."

So do it as recommeded.

Cc: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 00:44:30 +00:00
Fabio Estevam
54ec2d5f3f ASoC: wm8962: Use the preferred form for passing a size of a struct
According to Documentation/CodingStyle - Chapter 14:

"The preferred form for passing a size of a struct is the following:

	p = kmalloc(sizeof(*p), ...);

The alternative form where struct name is spelled out hurts readability and
introduces an opportunity for a bug when the pointer variable type is changed
but the corresponding sizeof that is passed to a memory allocator is not."

So do it as recommeded.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 00:44:16 +00:00
Fabio Estevam
3f7256fe5f ASoC: sgtl5000: Use the preferred form for passing a size of a struct
According to Documentation/CodingStyle - Chapter 14:

"The preferred form for passing a size of a struct is the following:

	p = kmalloc(sizeof(*p), ...);

The alternative form where struct name is spelled out hurts readability and
introduces an opportunity for a bug when the pointer variable type is changed
but the corresponding sizeof that is passed to a memory allocator is not."

So do it as recommeded.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 00:44:00 +00:00
Dmitry Eremin-Solenikov
ecf0015161 ASoC: pxa: Convert spitz to use snd_soc_register_card()
Use snd_soc_register_card() instead of creating a "soc-audio" platform device.

Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 00:42:57 +00:00
Lars-Peter Clausen
c1b4d1c777 ASoC: Use generic control handlers for S8 control
Commit f227b88f0f ("ASoC: core: Add signed register volume control logic")
added support for signed control to the generic volsw control handler.
This makes it possible to use them for the S8 control as well, rather than
having to use a custom control handler implementation.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 00:20:51 +00:00
Lars-Peter Clausen
92a99ea439 ASoC: dapm: Use more aggressive caching
Currently we cache the number of input and output paths going to/from a
widget only within a power update sequence. But not in between power update
sequences.

But we know how changes to the DAPM graph affect the number of input (form a
source) and output (to a sink) paths of a widget and only need to
recalculate them if a operation has been performed that might have changed
them.
	* Adding/removing or connecting/disconnecting a path means that the for
	  the source of the path the number of output paths can change and for
	  the sink the number of input paths can change.
	* Connecting/disconnecting a widget has the same effect has connecting/
	  disconnecting all paths of the widget. So for the widget itself the
	  number of inputs and outputs can change, for all sinks of the widget
	  the number of inputs can change and for all sources of the widget the
	  number of outputs can change.
	* Activating/Deactivating a stream can either change the number of
	  outputs on the sources of the widget associated with the stream or the
	  number of inputs on the sinks.

Instead of always invalidating all cached numbers of input and output paths
for each power up or down sequence this patch restructures the code to only
invalidate the cached numbers when a operation that might change them has
been performed. This can greatly reduce the number of DAPM power checks for
some very common operations.

Since per DAPM operation typically only either change the number of inputs
or outputs the number of path checks is reduced by at least 50%. The number
of neighbor checks is also reduced about the same percentage, but since the
number of neighbors encountered when walking from sink to source is not the
same as when walking from source to sink the actual numbers will slightly
vary from card to card (e.g. for a mixer we see 1 neighbor when walking from
source to sink, but the number of inputs neighbors when walking from source
to sink).

Bigger improvements can be observed for widgets with multiple connected
inputs and output (e.g. mixers probably being the most widespread form of
this). Previously we had to re-calculate the number of inputs and outputs
on all input and output paths. With this change we only have to re-calculate
the number of outputs on the input path that got changed and the number of
inputs on the output paths.

E.g. imagine the following example:

	A --> B ----.
	            v
	M --> N --> Z <-- S <-- R
	            |
	            v
	            X

Widget Z has multiple input paths, if any change was made that cause Z to be
marked as dirty the power state of Z has to be re-computed. This requires to
know the number of inputs and outputs of Z, which requires to know the
number of inputs and outputs of all widgets on all paths from or to Z.
Previously this meant re-computing all inputs and outputs of all the path
going into or out of Z. With this patch in place only paths that actually
have changed need to be re-computed.

If the system is idle (or the part of the system affected by the changed
path) the number of path checks drops to either 0 or 1, regardless of how
large or complex the DAPM context is. 0 if there is no connected sink and no
connected source. 1 if there is either a connected source or sink, but not
both. The number of neighbor checks again will scale accordingly and will be
a constant number that is the number of inputs or outputs of the widget for
which we did the path check.

When loading a state file or switching between different profiles typically
multiple mixer and mux settings are changed, so we see the benefit of this
patch multiplied for these kinds of operations.

Testing with the ADAU1761 shows the following changes in DAPM stats for
changing a single Mixer switch for a Mixer with 5 inputs while the DAPM
context is idle.

         Power  Path  Neighbour
Before:  2      12    30
After:   2       1     2

For the same switch, but with a active playback stream the stat changed are
as follows.

         Power  Path  Neighbour
Before:  10     20    54
After:   10      7    21

Cumulative numbers for switching the audio profile which changes 7 controls
while the system is idle:

         Power  Path  Neighbour
Before:  16      80   170
After:   16       7    23

Cumulative numbers for switching the audio profile which changes 7 controls
while playback is active:

         Power  Path  Neighbour
Before:  51     123   273
After:   51      29   109

Starting (or stopping) the playback stream:

         Power  Path  Neighbour
Before:  34     34    117
After:   34     17    69

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 00:19:59 +00:00
Lars-Peter Clausen
e409dfbfcc ASoC: dapm: Add a few supply widget sanity checks
Supply widgets are somewhat special and not all kinds of paths to or from
supply widgets make sense. This patch adds a few sanity checks that errors
out during the path instantiation for those invalid paths. This will prevent
drivers to depend on weird behavior resulting from such paths as well as
will allow the DAPM algorithms to assume that they never see such paths.

This patch adds checks for the following three invalid types of paths:
	* A path with a non-supply widget as a source connected to a supply
	  widget as a sink. Such a path has no effect on either of the two
	  connected widgets.
	* Paths with a connected() callback that have a non-supply widget as the
	  source. The DAPM algorithm only uses the conneceted() callback for
	  supply widget power checks. And since it prevents caching of the DAPM
	  state there is no intention to make it more generic as it has
	  negative performance implications.
	* Paths which connect a supply to a mixer or mux via a control. Controls
	  are only meant to affect the routing of audio data.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 00:19:59 +00:00
Lars-Peter Clausen
8be4da29cf ASoC: dapm: Mark endpoints instead of IO widgets dirty during suspend/resume
The state of endpoint widgets is affected by that card's power state.
Endpoint widgets that do no have the ignore_suspend flag set will be
considered inactive during suspend. So they have to be re-checked and marked
dirty after the card's power state changes. Currently the input and output
widgets are marked dirty instead, this works most of the time since
typically a path from one endpoint to another will go via a input or output
widget. But marking the endpoints dirty is technically more correct and will
also work for odd corner cases.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 00:19:59 +00:00
Lars-Peter Clausen
c1862c8bae ASoC: dapm: Add a flag to mark paths connected to supply widgets
Supply widgets do not count towards the input and output widgets of their
neighbors and for supply widgets themselves we do not care for the number
of input or output paths. This means that a path that connects to a supply
widget effectively behaves the same as a path that as the weak property set.
This patch adds a new path flag that gets set to true when the path is
connected to at least one supply widget. If a path with the flag set is
encountered in is_connected_{input,output}_ep() is is skipped in the same
way that weak paths are skipped. This slightly brings down the number of
path checks.

Since both the weak and the supply flag are implemented as bitfields which
are stored in the same word there is no runtime overhead due to checking
both rather than just one and also the size of the path struct is not
increased by this patch. Another advantage is that we do not have to handle
supply widgets in is_connected_{input,output}_ep() anymore since it will
never be called for supply widgets. The only exception is from
dapm_widget_power_read_file() where a check is added to special case supply
widgets.

Testing with the ADAU1761, which has a handful of supply widgets, shows the
following changes in the DAPM stats for a playback stream start.

         Power  Path  Neighbour
Before:  34     78    117
After:   34     48    117

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-10-28 00:19:59 +00:00