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path: root/sound/pci
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2018-06-28ALSA: hda/hdmi - Don't fall back to generic when i915 binding failsTakashi Iwai
When i915 component binding fails, it means that HDMI isn't applicable anyway. Although the probe with the generic HDMI parser would still work, it's essentially useless, hence better to be left unbound. This patch mimics the probe_id field at failing the i915 component binding so that the generic HDMI won't be bound after that. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-28ALSA: hda: Add AZX_DCAPS_PM_RUNTIME for AMD Raven RidgeKai-Heng Feng
This patch can make audio controller in AMD Raven Ridge gets runtime suspended to D3, to save ~1W power when it's not in use. Cc: Vijendar Mukunda <Vijendar.Mukunda@amd.com> Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-28ALSA: hda: split snd_hda_codec_new functionRakesh Ughreja
Split snd_hda_codec_new into two separate functions. snd_hda_codec_device_init allocates memory and registers with bus. snd_hda_codec_device_new initialializes the fields and performs snd_device_new. This enables reuse of legacy HDA codec drivers as ASoC codec drivers. In addition mark some functions with EXPORT_SYMBOL_GPL so that it can be called by ASoC wrapper around the legacy HDA driver (hdac_hda). Signed-off-by: Rakesh Ughreja <rakesh.a.ughreja@intel.com> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-28ALSA: hda - Move in_pm accessors to HDA coreTakashi Iwai
The in_pm atomic in hdac_device is an important field used as a flag as well as a refcount for PM. The existing snd_hdac_power_up/down helpers already refer to it in the HD-audio core code, while the code to actually setting the value (atomic_inc() / _dec()) is open-coded in HDA legacy side, which is hard to find. This patch adds the helper functions to set/reset the in_pm counter to HDA core and use them in HDA legacy side, for making it clearer who / where the PM is managed. There is no functional changes, just code refactoring. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-27ALSA: hda - Kill snd_hda_codec_update_cache()Takashi Iwai
snd_hda_codec_update_cache() used to serve for a slightly different purpose from snd_hdac_write_cache(), but now both of them became identical. Let's unify and replace with the latter one consistently. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-26ALSA: hda/realtek - Comprehensive model list for ALC882 & coTakashi Iwai
More comprehensive list of model strings for ALC882 & co. Also corrected the subsection in models.rst, too. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-26ALSA: hda/realtek - Comprehensive model list for ALC262Takashi Iwai
Added a few missing entries for ALC262 model strings. All about specific hardwares. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-26ALSA: hda/realtek - Comprehensive model list for ALC268Takashi Iwai
Add the missing entry for ALC268 model strings. Only "spdif" was missing, and that's it. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-26ALSA: hda/realtek - Comprehensive model list for ALC259 & coTakashi Iwai
Like the previous commit for ALC662, let's give more comprehensive list of model entries for ALC269 & co as well. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-26ALSA: hda/realtek - Comprehensive model list for ALC662 & coTakashi Iwai
ALC662 and others have far more fixup entries than the model table. Let's add more model string entries so that user can test / debug without compiling kernels at each time. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Apply PRE_PROBE fixup after ALC269 codec variant setupsTakashi Iwai
Currently patch_alc269() calls the fixup with HDA_FIXUP_ACT_PRE_PROBE before setting up the codec model-specific setups (e.g. setting codec_variant or mixer_nid setup). This is rather confusing as others do call the *_PRE_PROBE fixup after such a setup. Due to this disorder, we have to override spec->shutup not at the usual HDA_FIXUP_ACT_PRE_PROBE but the unusual HDA_FIXUP_ACT_PROBE time. This patch corrects the fixup call orders in patch_alc269(), and also corrects the action to set up spec->shutup accordingly. No functional changes but just refactoring. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/via - Use standard verb containersTakashi Iwai
In this patch, the remaining static init verbs in VIA codec driver are converted to the standard snd_hda_add_verbs() calls. The conversion is straightforward, but one change to be noted is the place of calls: since these verbs are supposed to be executed at the beginning of the init / resume procedure, we need to add snd_hda_add_verbs() calls before calling the other parsers. This is merely a cleanup, no functional changes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/via - Simplify control managementTakashi Iwai
This patch replaces the control element creations in VIA codec driver with the standard snd_hda_gen_add_kctl() calls as a cleanup. There are two major fields targeted by this patch: the beep controls and static init controls. The former is converted just like other codec drivers do. The spec->beep_amp field can be eliminated by this change as well. The latter, static init controls, are replaced simply with explicit snd_hda_gen_add_kctl() calls. After these conversions, via_build_controls() becomes superfluous and replaced with snd_hda_gen_build_controls(), too. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/via - Rewrite with error gotoTakashi Iwai
Currently VIA codec driver invokes via_free() at each place of the error path. Move the error handling to the end of each function commonly and do goto-error as a standard idiom. This is a preliminary patch for the further cleanups, and no functional changes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/cirrus - Simplify creation of new controlsTakashi Iwai
This patch moves the mixer creation code in Cirrus codec driver from its own build_controls callback to snd_hda_gen_add_kctl() for simplification. As a bonus, this allows us to remove the cs421x_build_controls as it becomes identical with snd_hda_gen_build_controls(). Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/conexant - Clean up beep codeTakashi Iwai
Like the previous commit for Realtek codec, the similar cleanup work can be applied to Conexant codec, too. A slight difference is that the call of cx_auto_parse_beep() is moved after snd_hda_gen_parse_auto_config(). It's not strictly needed, but it'd be good to make the creation of such beep mixers at the end, which matches with the former situation. Along with this conversion, cx_auto_build_controls() becomes just calling snd_hda_gen_build_controls(), so it's simply replaced with snd_hda_gen_build_controls. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Use common helper for creating beep controlsTakashi Iwai
In the Realtek codec driver, we used to build kctl elements for beep mixer in the own build_controls callback. This is an open-code and can be covered by the standard feature of the generic parser with snd_hda_gen_add_kctl() instead. Also, after the conversion, spec->beep_amp becomes superfluous; hence it's removed along with the conversion. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Use common helper for creating ALC268 beep controlsTakashi Iwai
The beep mixer controls are the only remaining stuff that uses spec->mixers[] array, and they can be well converted to the standard helper in the generic parser, snd_hda_gen_add_kctl(). This simplifies the code, especially the superfluous mixers and num_mixers fields can be now removed from alc_spec. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Use common GPIO mask for ALC660VD ASUS fixupTakashi Iwai
The ALC660VD_FIX_ASUS_GPIO1 quirk requires to set up GPIO bit0 ON while bit 1 OFF. Implement the fixup function and convert from the static init verbs. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Simplify Dell XPS13 GPIO handlingTakashi Iwai
Dell XPS13 has multi-step fixups, and one of them (ALC288_FIXUP_DELL_XPS_13_GPIO6) corresponds to the management of GPIO bit6 (0x40). It used to be a static init verbs (to turn *off* the bit6). In this patch, we convert it as the gpio_mask and gpio_dir initializations folded in the existing fixup function. With this change, ALC288_FIXUP_DELL_XPS_13_GPIO6 becomes superfluous, thus it's removed. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Convert some manual GPIO setupsTakashi Iwai
This patch converts the remaining static init verbs for GPIO bits with the common gpio_* fields management. Only the verbs setting the GPIO data bits are targeted in this patch. The rest will be changed in later patches. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Simplify mute LED GPIO handlingTakashi Iwai
Now we can simplify the mute LED GPIO handling as well. Each fixup dealing with GPIO for the mute LED controls defined the static init verbs, and they are converted to the common GPIO bit fields with the new helper, alc_fixup_hp_gpio_led(). Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Simplify alc885_fixup_macpro_gpio()Takashi Iwai
The fixup for Macbook Pro is nothing but setting the GPIO bits as usual but with one exception: it adds some delay at writing the GPIO bits. Add a flag to put the conditional delay in the common helper, and clean up alc885_fixup_macpro_gpio() with the new flag. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Consolidate gpio_data and gpio_ledTakashi Iwai
Until now, two fields, gpio_data and gpio_led, coexist in alc_spec although basically both of them serve for the same purpose -- the GPIO data bits. This patch consolidates both usages and eliminates the superfluous gpio_led field. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Add GPIO data update helperTakashi Iwai
For updating GPIO bits dynamically, provide a new helper, and use it from the alc260 automute hook. This helper will be used by other places in future, too. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Manage GPIO bits commonlyTakashi Iwai
Currently the GPIO bits are managed by individual verbs in some cases while toggled dynamically in other cases. For simplifying the GPIO management, define the GPIO mask, dir and data bits in alc_spec fields, and refer to / set them consistently from all places. As a first step, along with the definition of the new gpio_* fields, this patch replaces the static verbs that are used at initialization and fixups with the common helper functions. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Allow skipping spec->init_amp detectionTakashi Iwai
Some devices have the overrides of spec->init_amp at HDA_FIXUP_ACT_PROBE just because alc_ssid_check() gives the false-positive values from the SSID. For more consistent behavior, define the logic in the following way: - Define ALC_INIT_UNDEFINED as the default value before calling alc_ssid_check() - Each fixup may set up spec->init_amp with another value at HDA_FIXUP_ACT_PRE_PROBE - At detection, check whether spec->init_amp is ALC_INIT_UNDEFINED or not; if it's different, we skip the detection Also, it turned out that ASUS TX300 requires the spec->init_amp override, too; currently it ignores the GPIO bits implicitly by its static init verb, but this will be changed in the later patchset. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-25ALSA: hda/realtek - Fix the problem of two front mics on more machinesHui Wang
We have 3 more Lenovo machines, they all have 2 front mics on them, so they need the fixup to change the location for one of two mics. Among these 3 Lenovo machines, one of them has the same pin cfg as the machine with subid 0x17aa3138, so use the pin cfg table to apply fixup for them. The rest machines don't share the same pin cfg, so far use the subid to apply fixup for them. Fixes: a3dafb2200bf ("ALSA: hda/realtek - adjust the location of one mic") Cc: <stable@vger.kernel.org> Signed-off-by: Hui Wang <hui.wang@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-22ALSA: hda/realtek - Add a quirk for FSC ESPRIMO U9210Takashi Iwai
Fujitsu Seimens ESPRIMO Mobile U9210 requires the same fixup as H270 for the correct pin configs. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=200107 Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda/ca0132: make array ca0132_alt_chmaps staticColin Ian King
The array ca0132_alt_chmaps is local to the source and does not need to be in global scope, so make it static. Cleans up sparse warning: warning: symbol 'ca0132_alt_chmaps' was not declared. Should it be static? Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda/realtek - Simplify alc269_fixup_hp_line1_mic1_led()Takashi Iwai
alc269_fixup_hp_line1_mic1_led() can be simplified more with the existing helper code. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda - Sanity check of unexpected cap_sync_hook overrideTakashi Iwai
There are a couple of places setting cap_sync_hook in the codec drivers, and they just overwrite the value. Add a sanity check via WARN_ON() in case if an old non-NULL value is overridden and forgotten. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda/sigmatel - Use common helper for mic mute LEDTakashi Iwai
To simplify the code and to get the mic-mute LED behavior control, use the new helper function for controlling the mic mute LED instead of open-codes. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda - Allow multiple ADCs for mic mute LED controlsTakashi Iwai
Instead of refusing, allow the configuration with the multiple ADCs (thus multiple capture switches) for enabling the mic mute LED. This has been done for Sigmatel/IDT codecs, and we treat the OR-ed values from all capture switches as the boolean condition. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda/conexant - Use the mic-mute LED helperTakashi Iwai
Convert to use the common helper for controlling the mic mute LED for HP laptops, just as we've done for Realtek codecs. This will give the mic mute LED enum as gratis. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda/realtek - Use the mic-mute LED helper for HP and othersTakashi Iwai
Similar as the previous commit, convert to use the common helper for controlling the mic mute LED for HP and other machines in the Realtek codec driver, too. This will give the mic mute LED enum as gratis. Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda - Use the common helper for thinkpad_acpi mic mute LED handlingTakashi Iwai
Use the new common helper for setting up and controlling the mic mute LED over thinkpad_acpi. This also provides a new mixer enum "Mic Mute-LED Mode" (that was present only for Dell models), which allows user to choose the mic mute LED behavior. For example, if you want the mic mute LED turned on only while mic is on, choose "Follow Capture" there. Tested-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda - Move mic mute LED helper to the generic parserTakashi Iwai
Move the code for setting up and controlling the mic mute LED hook from dell-wmi helper to the generic parser, so that it can be referred from the multiple driver codes. No functional change. Tested-by: Pali Rohár <pali.rohar@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: hda - Force to link down at runtime suspend on ATI/AMD HDMITakashi Iwai
Henning Kühn reported that the discrete AMD GPU on his hybrid graphics laptop no longer runtime-suspends due to the recent commit 07f4f97d7b4b ("vga_switcheroo: Use device link for HDA controller"). The root cause is that the HDMI codec on AMD GPU doesn't support CLKSTOP and EPSS, which are currently mandatory for powering down the HD-audio link at runtime suspend. Because the HD-audio link is still up, HD-audio controller driver blocks the transition to D3. For addressing the regression, this patch adds a new flag to indicate the forced link-down, and sets it for AMD HDMI codecs appropriately in the codec driver. Fixes: 07f4f97d7b4b ("vga_switcheroo: Use device link for HDA controller") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=106957 Reported-by: Lukas Wunner <lukas@wunner.de> Reported-and-tested-by: Henning Kühn <prg@cooco.de> Cc: <stable@vger.kernel.org> # v4.17+ Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-21ALSA: lx6464es: Missing error code in snd_lx6464es_create()Dan Carpenter
We forgot to set the error code on this error path. Fixes: 4a23fc8cc068 ("ALSA: lx6464es: add error handling for pci_ioremap_bar") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-18ALSA: ctxfi: use enum type CT_SUM_CTL where appropriateStefan Agner
Currently a variable of type enum CT_AMIXER_CTL is used for enum CT_SUM_CTL values. This leads to warnings when using clang: sound/pci/ctxfi/ctmixer.c:945:32: warning: implicit conversion from enumeration type 'enum CT_SUM_CTL' to different enumeration type 'enum CT_AMIXER_CTL' [-Wenum-conversion] for (i = AMIXER_MASTER_F, j = SUM_IN_F; ~ ^~~~~~~~ sound/pci/ctxfi/ctmixer.c:975:29: warning: implicit conversion from enumeration type 'enum CT_SUM_CTL' to different enumeration type 'enum CT_AMIXER_CTL' [-Wenum-conversion] for (i = AMIXER_PCM_F, j = SUM_IN_F; i <= AMIXER_PCM_S; i++, j++) { ~ ^~~~~~~~ Introduce enum CT_SUM_CTL k and it instead. Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-18ALSA: ice1724: remove unused arrayStefan Agner
This fixes a warning seen with clang: sound/pci/ice1712/prodigy_hifi.c:321:28: warning: variable 'wm_vol' is not needed and will not be emitted [-Wunneeded-internal-declaration] static const unsigned char wm_vol[256] = { ^ Signed-off-by: Stefan Agner <stefan@agner.ch> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-17ALSA: hda/ca0132: Fix DMic data rate for Alienware M17x R4Alastair Bridgewater
The commentary says to use various parameters, and lays out what the mapping is... The code used a 32KHz rate when the comment says that it needs to use a 48KHz rate. And this has been the case since day one. On the Alienware M17x R4, the DMic used to have exceptionally quiet pickup and a lot of noise. Changing the data rate fixes both of these issues. Searching the kernel bug tracker for ca0132-related issues shows no mention of this being an issue for other hardware, and I have no other hardware to test with, so a quirk is used to limit the effect to just the M17x R4. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-17ALSA: hda/ca0132: Restore PCM Analog Mic-In2Alastair Bridgewater
Commit 009b8f979bf8cb5f7ec6d3dd7683585122ed10f8 conditionalized adding the "CA0132 Analog Mic-In2" PCM with a comment to the effect that, "desktops don't use this ADC", but the test was set up such that the ADC was only created for desktops. Invert the test. Fixes: 009b8f979bf8 ("ALSA: hda/ca0132: update core functions for sbz + r3di") Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-17ALSA: hda/ca0132: Don't test for QUIRK_NONEAlastair Bridgewater
QUIRK_NONE is, quite explicitly, the default case. The entire point of a quirks system is to allow "programming by difference" from a given base case, which requires that merely defining a new quirk for some piece of hardware should not change the behavior of the driver for that hardware. In turn, this means that testing for QUIRK_NONE explicitly is a violation of that implicit contract. Change a test for QUIRK_NONE and QUIRK_ALIENWARE to default, and add a test for QUIRK_SBZ to disable the default behavior in that instance. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-17ALSA: hda/ca0132: Restore behavior of QUIRK_ALIENWAREAlastair Bridgewater
Commit e93ac30a32a6ba7ac3b4b2a4379af1dadb91e505 (ALSA: HDA/ca0132: add extra init functions for r3di + sbz) introduced an extra initialization function that was improperly guarded, taking effect on systems with QUIRK_ALIENWARE, even though such systems were supposedly not affected. It may be that this piece of initialization should be done for all systems, but that's not a call that I can make. Fixes: e93ac30a32a6 ("ALSA: HDA/ca0132: add extra init functions for r3di + sbz") Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-17ALSA: hda/ca0132: Delete redundant UNSOL event requestsAlastair Bridgewater
During ca0132_init(), ca0132_init_unsol() is run before the spec->spec_init_verbs are written. ca0132_init_unsol() calls snd_hda_jack_detect_enable_callback(), which requests UNSOL events for three or four nodes, two of which were also (redundantly) requested by spec_init_verbs. Kill the redundant AC_VERB_SET_UNSOLICITED_ENABLE verbs. Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-17ALSA: hda/ca0132: Delete pointless assignments to struct auto_pin_cfg fieldsAlastair Bridgewater
ca0132_config() was setting some values in the auto_pin_cfg for the codec... but it is called prior to snd_hda_parse_pin_defcfg(), which does a memset() to clear the entire structure as one of its first actions, making the entire exercise pointless. Kill all use of struct auto_pin_cfg from ca0132_config(). Signed-off-by: Alastair Bridgewater <alastair.bridgewater@gmail.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-17ALSA: hda/realtek - Fix pop noise on Lenovo P50 & coTakashi Iwai
Some Lenovo laptops, e.g. Lenovo P50, showed the pop noise at resume or runtime resume. It turned out to be reduced by applying alc_no_shutup() just like TPT440 quirk does. Since there are many Lenovo models showing the same behavior, put this workaround in ALC269_FIXUP_THINKPAD_ACPI entry so that it's applied commonly to all such Lenovo machines. Reported-by: Hans de Goede <hdegoede@redhat.com> Tested-by: Benjamin Berg <bberg@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Takashi Iwai <tiwai@suse.de>
2018-06-15docs: Fix some broken referencesMauro Carvalho Chehab
As we move stuff around, some doc references are broken. Fix some of them via this script: ./scripts/documentation-file-ref-check --fix Manually checked if the produced result is valid, removing a few false-positives. Acked-by: Takashi Iwai <tiwai@suse.de> Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Acked-by: Stephen Boyd <sboyd@kernel.org> Acked-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com> Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Coly Li <colyli@suse.de> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Acked-by: Jonathan Corbet <corbet@lwn.net>