APPLIED: [SRU][R][PATCH 0/1] Fix no audio from right built-in speaker on HP ZBook with TAS2781 amplifier

[Mehmet Basaran]

Applied to resolute:linux master-next branch. Thanks.

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Chris Chiu via kernel-team <kernel-team at lists.ubuntu.com> writes:

> BugLink: https://bugs.launchpad.net/bugs/2156556
>
> [Impact]
> The TI TAS2781 smart amp fails to initialize when connected over SPI on the new HP HP ZBook.
> The right built-in speaker will fail to output after reboot
>
> [Fix]
> Two changes in one commit:
>
>     Always run the software reset sequence for the amp, not just in the
>     no-gpio path. This resets device-0 even when its hardware reset pin
>     has no effect.
>
>     Ignore -EXDEV during block processing when the device is on SPI.
>     The driver keeps iterating through the blocks and adds up the total
>     block size correctly.
>
> Upstream commit (in tiwai/sound for-next, not yet in a released tag):
> 513480da5e9c ALSA: hda/tas2781: Fix device-0 reset issue and handle
> -EXDEV in block data processing
>
> https://patch.msgid.link/20260609105253.19510-1-baojun.xu@ti.com
>
> [Test Plan]
> On HP Zbook with a TAS2781 amp connected over SPI:
>
> $ dmesg | grep -i tas2781
>
> Play audio:
> $ speaker-test -c 2 -t wav
>
> Without patch: dmesg shows "dev sw-reset fail" or
> "process_block: single write error" / "bulk_write error". No sound
> from the TAS2781 speakers.
>
> With patch: no reset or block errors in dmesg. Speakers play sound.
>
> [Where problems could occur]
> The reset change now runs the software reset on every path, including
> the gpio reset path. If the software reset is wrong for some amp, the
> device could fail to come up and stay silent.
> Both changes are amp init only, so a regression would show up as no
> sound on TAS2781 SPI systems.
>
> Baojun Xu (1):
>   ALSA: hda/tas2781: Fix device-0 reset issue and handle -EXDEV in block
>     data processing
>
>  sound/hda/codecs/side-codecs/tas2781_hda_spi.c | 16 ++++++++--------
>  sound/soc/codecs/tas2781-fmwlib.c              |  7 ++++---
>  2 files changed, 12 insertions(+), 11 deletions(-)
>
> --
> 2.43.0
>
>
> --
> kernel-team mailing list
> kernel-team at lists.ubuntu.com
> https://lists.ubuntu.com/mailman/listinfo/kernel-team
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