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

[Vitaly Rodionov]

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@xxxxxxxxx>
 
changes since v5:
 - Fix warning by kernel test robot <lkp@xxxxxxxxx>
 
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

 MAINTAINERS                     |   1 +
 include/sound/cs35l41.h         |   4 +
 sound/pci/hda/Kconfig           |   8 +
 sound/pci/hda/Makefile          |   2 +
 sound/pci/hda/cs35l41_hda.c     | 883 +++++++++++++++++++++++++++++++-
 sound/pci/hda/cs35l41_hda.h     |  39 ++
 sound/pci/hda/cs35l41_hda_i2c.c |   1 +
 sound/pci/hda/cs35l41_hda_spi.c |   1 +
 sound/pci/hda/hda_component.h   |   3 +
 sound/pci/hda/hda_cs_dsp_ctl.c  | 240 +++++++++
 sound/pci/hda/hda_cs_dsp_ctl.h  |  39 ++
 sound/pci/hda/patch_realtek.c   |  26 +-
 12 files changed, 1242 insertions(+), 5 deletions(-)
 create mode 100644 sound/pci/hda/hda_cs_dsp_ctl.c
 create mode 100644 sound/pci/hda/hda_cs_dsp_ctl.h

-- 
2.34.1