[v4,00/10] ASoC: tas27{64,70}: improve support for Apple codec variants

Message

James Calligeros April 5, 2025, 12:12 a.m. UTC

Hi all,

This series introduces a number of changes to the drivers for
the Texas Instruments TAS2764 and TAS2770 amplifiers in order to
introduce (and improve in the case of TAS2770) support for the
variants of these amps found in Apple Silicon Macs.

Apple's variant of TAS2764 is known as SN012776, and as always with
Apple is a subtly incompatible variant with a number of quirks. It
is not publicly available. The TAS2770 variant is known as TAS5770L,
and does not require incompatible handling.

Much as with the Cirrus codec patches, I do not
expect that we will get any official acknowledgement that these parts
exist from TI, however I would be delighted to be proven wrong.

This series has been living in the downstream Asahi kernel tree[1]
for over two years, and has been tested by many thousands of users
by this point[2].

v4 drops the TDM idle TX slot behaviour patches. I experimented with
the API discussed in v3, however this did not work on any of the machines
I tested it with. More tweaking is probably needed.

[1] https://github.com/AsahiLinux/linux/tree/asahi-wip
[2] https://stats.asahilinux.org/

---
Changes in v4:
- Moved remaining changes to the top of the set
- Dropped already merged commits
- hwmon now reads temp from regmap
- Bumped regmap max reg patch above Apple quirks patch
- Dropped TDM idle slot TX behaviour patches
- Link to v3: https://lore.kernel.org/r/[e-mail]

Changes in v3:
- Add Rob's Acked-by to Devicetree compatible additions
- Dropped cherry-picked patches
- Droped abuse of regulator API
- Droped bespoke sysfs interface
- Rationalised temperature reading for hwmon interface
- Set SN012776 device ID with OF match data
- Changed probe ops reliant on device ID to case/switch statement
- Added documentation for new Devicetree properties
- Improved a number of poor quality commit messages
- Documented behaviour of die temperature ADC
- Link to v2: https://lore.kernel.org/r/[e-mail]

Changes in v2:
- Changed author field of patch to match Martin's Signed-off-by
- Added Neal's Reviewed-by to reviewed patches
- Moved fixes to existing code to the top of the series
- Removed tas2764's explicit dependency on OF
- Removed complicated single-use tas2764 quirks macro and replaced with
  if block
- Added hwmon interface for codec die temp
- Fixed a malformed commit message
- Link to v1: https://lore.kernel.org/r/[e-mail]

---
Hector Martin (4):
      ASoC: tas2770: Power cycle amp on ISENSE/VSENSE change
      ASoC: tas2770: Support setting the PDM TX slot
      ASoC: tas2770: Set the SDOUT polarity correctly
      ASoC: tas2764: Enable main IRQs

James Calligeros (2):
      ASoC: tas2770: expose die temp to hwmon
      ASoC: tas2764: expose die temp to hwmon

Martin Povišer (4):
      ASoC: tas2764: Reinit cache on part reset
      ASoC: tas2764: Crop SDOUT zero-out mask based on BCLK ratio
      ASoC: tas2764: Raise regmap range maximum
      ASoC: tas2764: Apply Apple quirks

 sound/soc/codecs/tas2764-quirks.h | 180 +++++++++++++++++++++++++
 sound/soc/codecs/tas2764.c        | 176 +++++++++++++++++++++++-
 sound/soc/codecs/tas2764.h        |   3 +
 sound/soc/codecs/tas2770.c        | 160 +++++++++++++++++++++-
 sound/soc/codecs/tas2770.h        |   6 +
 5 files changed, 519 insertions(+), 6 deletions(-)
---
base-commit: 3a0f0a4355df0240485ed62b6bd6afa5b3e689c5
change-id: 20250214-apple-codec-changes-6e656dc1e24d

Best regards,