ALSA: hda: cs35l41: Possible null pointer dereference in cs35l41_hda_unbind()

[ Upstream commit 6386682cdc8b41319c92fbbe421953e33a28840c ]

The cs35l41_hda_unbind() function clears the hda_component

ALSA: hda: cs35l41: Possible null pointer dereference in cs35l41_hda_unbind()

[ Upstream commit 6386682cdc8b41319c92fbbe421953e33a28840c ]

The cs35l41_hda_unbind() function clears the hda_component entry
matching it's index and then dereferences the codec pointer held in the
first element of the hda_component array, this is an issue when the
device index was 0.

Instead use the codec pointer stashed in the cs35l41_hda structure as it
will still be valid.

Fixes: 7cf5ce66dfda ("ALSA: hda: cs35l41: Add device_link between HDA and cs35l41_hda")
Signed-off-by: Simon Trimmer <simont@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20240531120820.35367-1-simont@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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ALSA: hda: cs35l41: Undo runtime PM changes at driver exit time

[ Upstream commit 85a1bf86fac0c195929768b4e92c78cad107523b ]

According to the documentation, drivers are responsible for undoing at
r

ALSA: hda: cs35l41: Undo runtime PM changes at driver exit time

[ Upstream commit 85a1bf86fac0c195929768b4e92c78cad107523b ]

According to the documentation, drivers are responsible for undoing at
removal time all runtime PM changes done during probing.

Hence, add the missing calls to pm_runtime_dont_use_autosuspend(), which
are necessary for undoing pm_runtime_use_autosuspend().

Fixes: 1873ebd30cc8 ("ALSA: hda: cs35l41: Support Hibernation during Suspend")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20230907171010.1447274-11-cristian.ciocaltea@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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ALSA: hda: cs35l41: Fix unbalanced pm_runtime_get()

[ Upstream commit 486465508f8a5fe441939a7d97607f4460a60891 ]

If component_add() fails, probe() returns without calling
pm_runtime_put(), which le

ALSA: hda: cs35l41: Fix unbalanced pm_runtime_get()

[ Upstream commit 486465508f8a5fe441939a7d97607f4460a60891 ]

If component_add() fails, probe() returns without calling
pm_runtime_put(), which leaves the runtime PM usage counter incremented.

Fix the issue by jumping to err_pm label and drop the now unnecessary
pm_runtime_disable() call.

Fixes: 7b2f3eb492da ("ALSA: hda: cs35l41: Add support for CS35L41 in HDA systems")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20230907171010.1447274-10-cristian.ciocaltea@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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ASoC: cs35l41: Fix broken shared boost activation

[ Upstream commit 77bf613f0bf08c021309cdb5f84b5f630b829261 ]

Enabling the active/passive shared boosts requires setting SYNC_EN, but
*not* before r

ASoC: cs35l41: Fix broken shared boost activation

[ Upstream commit 77bf613f0bf08c021309cdb5f84b5f630b829261 ]

Enabling the active/passive shared boosts requires setting SYNC_EN, but
*not* before receiving the PLL Lock signal.

Due to improper error handling, it was not obvious that waiting for the
completion operation times out and, consequently, the shared boost is
never activated.

Further investigations revealed the signal is triggered while
snd_pcm_start() is executed, right after receiving the
SNDRV_PCM_TRIGGER_START command, which happens long after the
SND_SOC_DAPM_PRE_PMU event handler is invoked as part of
snd_pcm_prepare(). That is where cs35l41_global_enable() is called
from.

Increasing the wait duration doesn't help, as it only causes an
unnecessary delay in the invocation of snd_pcm_start(). Moving the wait
and the subsequent regmap operations to the SNDRV_PCM_TRIGGER_START
callback is not a solution either, since they would be executed in an
IRQ-off atomic context.

Solve the issue by setting the SYNC_EN bit in PWR_CTRL3 register right
after receiving the PLL Lock interrupt.

Additionally, drop the unnecessary writes to PWR_CTRL1 register, part of
the original mdsync_up_seq, which would have toggled GLOBAL_EN with
unwanted consequences on PLL locking behavior.

Fixes: f5030564938b ("ALSA: cs35l41: Add shared boost feature")
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: David Rhodes <david.rhodes@cirrus.com>
Reviewed-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20230907171010.1447274-5-cristian.ciocaltea@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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ALSA: hda: cs35l41: Cleanup and fix double free in firmware request

There is an unlikely but possible double free when loading firmware,
and a missing free calls if a firmware is successfully reques

ALSA: hda: cs35l41: Cleanup and fix double free in firmware request

There is an unlikely but possible double free when loading firmware,
and a missing free calls if a firmware is successfully requested but
the coefficient file request fails, leading to the fallback firmware
request occurring without clearing the previously loaded firmware.

Fixes: cd40dad2ca91 ("ALSA: hda: cs35l41: Ensure firmware/tuning pairs are always loaded")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202309291331.0JUUQnPT-lkp@intel.com/
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20231003142138.180108-1-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Support systems with missing _DSD properties

Some systems using CS35L41 with HDA were released without some
required _DSD properties in ACPI. To support these special cases,
add

ALSA: hda: cs35l41: Support systems with missing _DSD properties

Some systems using CS35L41 with HDA were released without some
required _DSD properties in ACPI. To support these special cases,
add an api to configure the correct properties for systems with
this issue.

This initial commit moves the no _DSD support for Lenovo
Legion Laptops (CLSA0100, CLSA0101) into a new framework which
can be extended to support additional laptops in the future.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230815161033.3519-1-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Print amp configuration after bind

Print amp configuration information to be able to confirm ACPI
_DSD information (and other useful info) for each amp on each
system using CS35L

ALSA: hda: cs35l41: Print amp configuration after bind

Print amp configuration information to be able to confirm ACPI
_DSD information (and other useful info) for each amp on each
system using CS35L41, without having to get the acpidump.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230802121235.467358-1-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Ensure amp is only unmuted during playback

Currently we only mute after playback has finished, and unmute
prior to setting global enable. To prevent any possible pops
and clicks,

ALSA: hda: cs35l41: Ensure amp is only unmuted during playback

Currently we only mute after playback has finished, and unmute
prior to setting global enable. To prevent any possible pops
and clicks, mute at probe, and then only unmute after global
enable is set.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-12-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Add device_link between HDA and cs35l41_hda

To ensure consistency between the HDA core and the CS35L41 HDA
driver, add a device_link between them. This ensures that the
HDA core

ALSA: hda: cs35l41: Add device_link between HDA and cs35l41_hda

To ensure consistency between the HDA core and the CS35L41 HDA
driver, add a device_link between them. This ensures that the
HDA core will suspend first, and resume second, meaning the
amp driver will not miss any events from the playback hook from
the HDA core during system suspend and resume.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-11-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Rework System Suspend to ensure correct call separation

In order to correctly pause audio on suspend, amps using external boost
require parts of the pause sequence to be called f

ALSA: hda: cs35l41: Rework System Suspend to ensure correct call separation

In order to correctly pause audio on suspend, amps using external boost
require parts of the pause sequence to be called for all amps before moving
on to the next steps.
For example, as part of pausing the audio, the VSPK GPIO must be disabled,
but since this GPIO is controlled by one amp, but controls the boost for
all amps, it is required to separate the calls.
During playback this is achieved by using the pre and post playback hooks,
however during system suspend, this is not possible, so to separate the
calls, we use both the .prepare and .suspend calls to pause the audio.

Currently, for this reason, we do not restart audio on system resume.
However, we can support this by relying on the playback hook to resume
playback after system suspend.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-10-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Use pre and post playback hooks

Use new hooks to ensure separation between play/pause actions,
as required by external boost.

External Boost on CS35L41 requires the amp to go th

ALSA: hda: cs35l41: Use pre and post playback hooks

Use new hooks to ensure separation between play/pause actions,
as required by external boost.

External Boost on CS35L41 requires the amp to go through a
particular sequence of steps. One of these steps involes
the setting of a GPIO. This GPIO is connected to one or
more of the amps, and it may control the boost for all of
the amps. To ensure that the GPIO is set when it is safe
to do so, and to ensure that boost is ready for the rest of
the sequence to be able to continue, we must ensure that
the each part of the sequence is executed for each amp
before moving on to the next part of the sequence.

Some of the Play and Pause actions have moved from Open to
Prepare. This is because Open is not guaranteed to be called
again on system resume, whereas Prepare should.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-9-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Move Play and Pause into separate functions

This allows play and pause to be called from multiple places,
which is necessary for system suspend and resume.

Signed-off-by: Stefan

ALSA: hda: cs35l41: Move Play and Pause into separate functions

This allows play and pause to be called from multiple places,
which is necessary for system suspend and resume.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-7-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Ensure we pass up any errors during system suspend.

There are several steps required to put the system into system suspend.
Some of these steps may fail, so the driver should pas

ALSA: hda: cs35l41: Ensure we pass up any errors during system suspend.

There are several steps required to put the system into system suspend.
Some of these steps may fail, so the driver should pass up the errors
if they occur.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-6-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Ensure we correctly re-sync regmap before system suspending.

In order to properly system suspend, it is necessary to unload the firmware
and ensure the chip is ready for shutdown

ALSA: hda: cs35l41: Ensure we correctly re-sync regmap before system suspending.

In order to properly system suspend, it is necessary to unload the firmware
and ensure the chip is ready for shutdown (if necessary). If the system
is currently in runtime suspend, it is necessary to wake up the device,
and then make it ready. Currently, the wake does not correctly resync
the device, which may mean it cannot suspend correctly. Fix this by
performaing a resync.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-5-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Check mailbox status of pause command after firmware load

Currently, we do not check the return status of the pause command,
immediately after we load firmware. If the pause has

ALSA: hda: cs35l41: Check mailbox status of pause command after firmware load

Currently, we do not check the return status of the pause command,
immediately after we load firmware. If the pause has failed,
the firmware is not running.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-4-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: cs35l41: Use mbox command to enable speaker output for external boost

To enable the speaker output in external boost mode, 2 registers must
be set, one after another. The longer the time betwe

ALSA: cs35l41: Use mbox command to enable speaker output for external boost

To enable the speaker output in external boost mode, 2 registers must
be set, one after another. The longer the time between the writes of
the two registers, the more likely, and more loudly a pop may occur.
To minimize this, an mbox command can be used to allow the firmware
to perform this action, minimizing any delay between write, thus
minimizing any pop or click as a result. The old method will remain
when running without firmware.

Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230721151816.2080453-2-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Fix endian conversions

Found during static analysis, ensure variables are correct
types before endian conversion.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>

ALSA: hda: cs35l41: Fix endian conversions

Found during static analysis, ensure variables are correct
types before endian conversion.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230606103436.455348-3-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Clean up Firmware Load Controls

Ensure Firmware Load control and Firmware Type control
returns 1 when the value changes.

Remove fw_mutex from firmware load control put, since it

ALSA: hda: cs35l41: Clean up Firmware Load Controls

Ensure Firmware Load control and Firmware Type control
returns 1 when the value changes.

Remove fw_mutex from firmware load control put, since it is
unnecessary, and prevents any possibility of mutex inversion.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230606103436.455348-2-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: cs35l41: Add shared boost feature

Shared boost allows two amplifiers to share a single boost circuit by
communicating on the MDSYNC bus.
The passive amplifier does not control the boost and re

ALSA: cs35l41: Add shared boost feature

Shared boost allows two amplifiers to share a single boost circuit by
communicating on the MDSYNC bus.
The passive amplifier does not control the boost and receives data from
the active amplifier.

Shared Boost is not supported in HDA Systems.
Based on David Rhodes shared boost patches.

Signed-off-by: Lucas Tanure <lucas.tanure@collabora.com>
Reviewed-by: David Rhodes <david.rhodes@cirrus.com>
Link: https://lore.kernel.org/r/20230223084324.9076-4-lucas.tanure@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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ALSA: hda: cs35l41: Enable Amp High Pass Filter

This helps smooth out pops and clicks in the amps.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/202

ALSA: hda: cs35l41: Enable Amp High Pass Filter

This helps smooth out pops and clicks in the amps.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230213145008.1215849-4-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Ensure firmware/tuning pairs are always loaded

To ensure firmware for cs35l41 is correctly running, it is necessary
that a corresponding tuning file is also loaded. Without both,

ALSA: hda: cs35l41: Ensure firmware/tuning pairs are always loaded

To ensure firmware for cs35l41 is correctly running, it is necessary
that a corresponding tuning file is also loaded. Without both,
the firmware may not be performing correctly
Ensure that if we load the firmware, we have also loaded the correct
tuning file. Otherwise, fall back to default firmware and tuning.
If default tuning is also missing, then disable DSP firmware.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230213145008.1215849-3-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Check runtime suspend capability at runtime_idle

The runtime PM core checks with runtime_idle callback whether it can
goes to the runtime suspend or not, and we can put the boost

ALSA: hda: cs35l41: Check runtime suspend capability at runtime_idle

The runtime PM core checks with runtime_idle callback whether it can
goes to the runtime suspend or not, and we can put the boost type
check there instead of runtime_suspend and _resume calls. This will
reduce the unnecessary runtime_suspend() calls.

Fixes: 1873ebd30cc8 ("ALSA: hda: cs35l41: Support Hibernation during Suspend")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20230105093531.16960-2-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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ALSA: hda: cs35l41: Don't return -EINVAL from system suspend/resume

The recent commit to support the system suspend for CS35L41 caused a
regression on the models with CS35L41_EXT_BOOST_NO_VSPK_SWITC

ALSA: hda: cs35l41: Don't return -EINVAL from system suspend/resume

The recent commit to support the system suspend for CS35L41 caused a
regression on the models with CS35L41_EXT_BOOST_NO_VSPK_SWITC boost
type, as the suspend/resume callbacks just return -EINVAL. This is
eventually handled as a fatal error and blocks the whole system
suspend/resume.

For avoiding the problem, this patch corrects the return code from
cs35l41_system_suspend() and _resume() to 0, and replace dev_err()
with dev_err_once() for stop spamming too much.

Fixes: 88672826e2a4 ("ALSA: hda: cs35l41: Support System Suspend")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/all/e6751ac2-34f3-d13f-13db-8174fade8308@pm.me
Link: https://lore.kernel.org/r/20230105093531.16960-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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firmware: cs_dsp: Make the exports namespaced

Move all the exports into a namespace.
This also adds the MODULE_IMPORT_NS to the 3 drivers that use the
exported functions.

Signed-off-by: Richard Fit

firmware: cs_dsp: Make the exports namespaced

Move all the exports into a namespace.
This also adds the MODULE_IMPORT_NS to the 3 drivers that use the
exported functions.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20221124134556.3343784-3-rf@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

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ALSA: hda: cs35l41: Support System Suspend

Add support for system suspend into the CS35L41 HDA Driver.
Since S4 suspend may power off the system, it is required
that the driver ensure the part is sa

ALSA: hda: cs35l41: Support System Suspend

Add support for system suspend into the CS35L41 HDA Driver.
Since S4 suspend may power off the system, it is required
that the driver ensure the part is safe to be shutdown before
system suspend, as well as ensuring that the firmware is
unloaded before shutdown. The part must then be restored
on system resume, including re-downloading the firmware.

Signed-off-by: Stefan Binding <sbinding@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20221011143552.621792-6-sbinding@opensource.cirrus.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>

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