linux-kernel - Re: [PATCH v8 00/14] ALSA: hda: cirrus: Add initial DSP support and firmware loading

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Date:   Wed, 13 Jul 2022 13:41:41 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Mark Brown <broonie@...nel.org>
Cc:     Vitaly Rodionov <vitalyr@...nsource.cirrus.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, <alsa-devel@...a-project.org>,
        <patches@...nsource.cirrus.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 00/14] ALSA: hda: cirrus: Add initial DSP support and firmware loading

On Sat, 09 Jul 2022 18:27:34 +0200,
Takashi Iwai wrote:
> 
> On Mon, 04 Jul 2022 14:50:06 +0200,
> Takashi Iwai wrote:
> > 
> > On Thu, 30 Jun 2022 02:23:21 +0200,
> > Vitaly Rodionov wrote:
> > > 
> > > The CS35L41 Amplifier contains a DSP, capable of running firmware.
> > > The firmware can run algorithms such as Speaker Protection, to ensure
> > > that playback at high gains do not harm the speakers.
> > > Adding support for CS35L41 firmware into the CS35L41 HDA driver also
> > > allows us to support several extra features, such as hiberation 
> > > and interrupts.
> > > 
> > > The chain adds support in stages:
> > > - General fixes to improve generalization and code re-use inside
> > >   the CS35L41 HDA driver.
> > > - Add support for interrupts into the driver, which is required
> > >   for complete support of the firmware.
> > > - Refactor ASoC CS35L41 code which deals with firmware to allow
> > >   for code re-use inside the CS35L41 HDA driver.
> > > - Add support for loading firmware and tuning files from file system,
> > >   and creating alsa controls to control it.
> > > - Support firmware load paths for different hardware systems.
> > > - Support suspend/resume in the driver when using firmware. The firmware
> > >   supports hibernation, which allows the CS35L41 to drop into a low
> > >   power mode during suspend.
> > > - Support the ability to unload firmware, swap and reload the firmware.
> > >   This is to allow different firmware to run during calibration.
> > > 
> > > The intended use-case is to load the firmware once on boot, and the driver
> > > autmatically tries to load the firmware after it binds to the HDA driver.
> > > This behaviour can be switched off using a kconfig, if desired.
> > > 
> > > changes since v7:
> > >  - Use private_data rather than private_value to save control info
> > >  - Clean up alsa control memory allocation/deallocation
> > >  - Remove unnecessary whitespace
> > >  - Get subsystem id from codec, rather than saving it separately
> > > 
> > > changes since v6:
> > >  - Fix warning by kernel test robot <lkp@...el.com>
> > >  
> > > changes since v5:
> > >  - Fix warning by kernel test robot <lkp@...el.com>
> > >  
> > > changes since v4:
> > > - Fully remove tlv remnants from control add apis
> > > - Remove unnecessary debug
> > > - Rename variable to be more generic
> > > - Remove redundent length check from read/write control apis
> > > 
> > > 
> > > - Use SNDRV_CTL_ELEM_IFACE_CARD for firmware load controls
> > > - Make kcontrol add/remove synchronous
> > > - Load firmware asynchronous when loading via control
> > > - Used cached controls when reloading firmware; only delete
> > > controls when removing the driver itself
> > > 
> > > 
> > > - Improve kcontrol remove
> > > - Fix control write + notify
> > > - Cleanup of unnecessary code
> > > - Fix race condition when loading firmware before playback
> > > - Ensure errors are properly propogated
> > > - Fix include for Module parameters
> > > 
> > > Stefan Binding (13):
> > >   ALSA: hda: hda_cs_dsp_ctl: Add Library to support CS_DSP ALSA controls
> > >   ALSA: hda: hda_cs_dsp_ctl: Add apis to write the controls directly
> > >   ALSA: hda: cs35l41: Save codec object inside component struct
> > >   ALSA: hda: cs35l41: Save Subsystem ID inside CS35L41 Driver
> > >   ALSA: hda: cs35l41: Support reading subsystem id from ACPI
> > >   ALSA: hda: cs35l41: Support multiple load paths for firmware
> > >   ALSA: hda: cs35l41: Support Speaker ID for laptops
> > >   ALSA: hda: cs35l41: Support Hibernation during Suspend
> > >   ALSA: hda: cs35l41: Read Speaker Calibration data from UEFI variables
> > >   ALSA: hda: hda_cs_dsp_ctl: Add fw id strings
> > >   ALSA: hda: cs35l41: Add defaulted values into dsp bypass config
> > >     sequence
> > >   ALSA: hda: cs35l41: Support Firmware switching and reloading
> > >   ALSA: hda: cs35l41: Add module parameter to control firmware load
> > > 
> > > Vitaly Rodionov (1):
> > >   ALSA: hda: cs35l41: Add initial DSP support and firmware loading
> > 
> > Thanks, this version looks better than previous ones, and I'm fine to
> > apply as is, to make things going forward.  But this seems requiring
> > the prerequisite in ASoC codec side.
> > 
> > Mark, could you send a PR to merge into my tree so that I can apply
> > those series?
> 
> Mark?
> 
> This series need the ASoC for-next change as prerequisite.

Mark?  It's been preventing the merge.


Takashi