[Bug 2156556] Re: Fix no audio from right built-in speaker on HP ZBook with TAS2781 amplifier

This bug is awaiting verification that the linux-nvidia/7.0.0-1016.16 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-resolute-linux-nvidia' to 'verification-done- resolute-linux-nvidia'. If the problem still exists, change the tag 'verification-needed-resolute-linux-nvidia' to 'verification-failed- resolute-linux-nvidia'. If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-resolute-linux-nvidia-v2 verification-needed-resolute-linux-nvidia -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2156556 Title: Fix no audio from right built-in speaker on HP ZBook with TAS2781 amplifier Status in HWE Next: New Status in linux package in Ubuntu: New Status in linux-oem-6.17 package in Ubuntu: New Status in linux source package in Noble: New Status in linux-oem-6.17 source package in Noble: Fix Released Status in linux source package in Resolute: Fix Released Status in linux-oem-6.17 source package in Resolute: New Bug description: [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: 1. 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. 2. 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. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2156556/+subscriptions