This patch series addresses several issues in the Freescale Generic ASoC
Sound Card driver related to hardware limitations, DPCM path switching,
and codec-specific constraints.

The fsl-asoc-card driver provides a generic machine driver for i.MX SoCs,
supporting various codecs and optional ASRC (Asynchronous Sample Rate
Converter) for sample rate conversion. During testing several issues were
identified:

1. Missing channel constraint propagation in DPCM mode
2. DPCM path switching causing audio dropouts
3. Hardware channel alignment requirements
4. Clock generation limitations preventing certain audio formats
5. Codec-specific PLL frequency violations

changes in v2:
- Patch 3/5: remove the static constraint_rates and constraint_channels
  variable in fsl_asoc_card_startup(), move them to
  struct fsl_asoc_card_priv, to avoid conflict with other instance
- Patch 4/5: make exclude S20_3LE format specific to WM8960/WM8962 + SAI
  case, to avoid impact to other users.

Shengjiu Wang (5):
  ASoC: fsl-asoc-card: enable dpcm_merged_chan flag for ASRC frontend
  ASoC: fsl-asoc-card: enable ignore_pmdown_time for ASRC case
  ASoC: fsl-asoc-card: add channel and rate constraints for CS42888
  ASoC: fsl-asoc-card: exclude S20_3LE format for WM8960/WM8962 + SAI
  ASoC: fsl-asoc-card: reduce WM8904 PLL ratio to meet frequency limit

 sound/soc/fsl/fsl-asoc-card.c | 111 +++++++++++++++++++++++++++++++++-
 1 file changed, 110 insertions(+), 1 deletion(-)

-- 
2.34.1

On Wed, 29 Apr 2026 18:00:22 +0800, Shengjiu Wang wrote:
> ASoC: fsl-asoc-card: Add some improvements
> 
> This patch series addresses several issues in the Freescale Generic ASoC
> Sound Card driver related to hardware limitations, DPCM path switching,
> and codec-specific constraints.
> 
> The fsl-asoc-card driver provides a generic machine driver for i.MX SoCs,
> supporting various codecs and optional ASRC (Asynchronous Sample Rate
> Converter) for sample rate conversion. During testing several issues were
> identified:
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-7.2

Thanks!

[1/5] ASoC: fsl-asoc-card: enable dpcm_merged_chan flag for ASRC frontend
      https://git.kernel.org/broonie/sound/c/3b9c088aeabf
[2/5] ASoC: fsl-asoc-card: enable ignore_pmdown_time for ASRC case
      https://git.kernel.org/broonie/sound/c/d611feb52de8
[3/5] ASoC: fsl-asoc-card: add channel and rate constraints for CS42888
      https://git.kernel.org/broonie/sound/c/e78abe395d30
[4/5] ASoC: fsl-asoc-card: exclude S20_3LE format for WM8960/WM8962 + SAI
      https://git.kernel.org/broonie/sound/c/fa7d8ea56c58
[5/5] ASoC: fsl-asoc-card: reduce WM8904 PLL ratio to meet frequency limit
      https://git.kernel.org/broonie/sound/c/99b5316f08f3

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark