[Bug 2169378] [NEW] Add Realtek RT721_U and RT718 SoundWire audio support

Public bug reported: [Impact] Audio on new Dell Pro 5 All-in-One platforms is not fully supported on systems with the newer Realtek SoundWire codec variants. The driver lacks device matching and the variant-specific settings needed for playback, microphone capture, and headset setup. [Fix] Extend the existing codec driver to match the new variants and apply their register settings, headset calibration, and playback volume ranges. Add the new device to the shared SoundWire codec information table. ASoC: rt721: Add support for the RT721_U and RT718 codec variants https://patch.msgid.link/20260917104244.2512641-1-oder_chiou@realtek.com [Test Plan] Use systems with each newly supported codec variant. Boot the unpatched kernel and then the patched kernel with the same audio userspace. List the playback and capture devices: aplay -l arecord -l Select the speaker output and set a safe audible volume. Use the matching ALSA card and device numbers to test stereo playback: speaker-test -D plughw:CARD,DEVICE -c 2 -t wav -l 1 Plug in a headset, select its output, and repeat with its playback device. Select the headset microphone and record while speaking: arecord -D plughw:CARD,DEVICE -f S16_LE -r 48000 -c 1 -d 5 /tmp/realtek-mic.wav aplay /tmp/realtek-mic.wav Repeat the recording with the built-in microphone selected. Replace CARD and DEVICE with the numbers for each path. Without the support patch, the new device may not bind to the driver, or audio paths may fail because they use settings for the original variant. With the patch, the device binds and playback and capture work on each path. For the reset dependency, warm-reboot an affected system from Windows into Ubuntu and run the playback test. Without the reset fix, output can sound abnormal. With the fix, output sounds normal. [Where problems could occur] The changes affect the Realtek SoundWire codec driver and the shared SoundWire codec table. Wrong variant detection or volume ranges could cause silent, distorted, or unexpectedly loud playback. Wrong pin or calibration settings could break headset detection or microphone capture. ** Affects: hwe-next Importance: Undecided Status: New ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Affects: linux (Ubuntu Resolute) Importance: Undecided Status: New ** Affects: linux (Ubuntu Stonking) Importance: Undecided Status: New ** Tags: jira-somerville-4796 oem-priority somerville ** Also affects: linux (Ubuntu Resolute) Importance: Undecided Status: New ** Also affects: linux (Ubuntu Stonking) Importance: Undecided Status: New ** Tags added: jira-somerville-4796 oem-priority somerville -- You received this bug notification because you are subscribed to linux in Ubuntu. Matching subscriptions: Bgg, Bmail, Nb https://bugs.launchpad.net/bugs/2169378 Title: Add Realtek RT721_U and RT718 SoundWire audio support Status in HWE Next: New Status in linux package in Ubuntu: New Status in linux source package in Resolute: New Status in linux source package in Stonking: New Bug description: [Impact] Audio on new Dell Pro 5 All-in-One platforms is not fully supported on systems with the newer Realtek SoundWire codec variants. The driver lacks device matching and the variant-specific settings needed for playback, microphone capture, and headset setup. [Fix] Extend the existing codec driver to match the new variants and apply their register settings, headset calibration, and playback volume ranges. Add the new device to the shared SoundWire codec information table. ASoC: rt721: Add support for the RT721_U and RT718 codec variants https://patch.msgid.link/20260917104244.2512641-1-oder_chiou@realtek.com [Test Plan] Use systems with each newly supported codec variant. Boot the unpatched kernel and then the patched kernel with the same audio userspace. List the playback and capture devices: aplay -l arecord -l Select the speaker output and set a safe audible volume. Use the matching ALSA card and device numbers to test stereo playback: speaker-test -D plughw:CARD,DEVICE -c 2 -t wav -l 1 Plug in a headset, select its output, and repeat with its playback device. Select the headset microphone and record while speaking: arecord -D plughw:CARD,DEVICE -f S16_LE -r 48000 -c 1 -d 5 /tmp/realtek-mic.wav aplay /tmp/realtek-mic.wav Repeat the recording with the built-in microphone selected. Replace CARD and DEVICE with the numbers for each path. Without the support patch, the new device may not bind to the driver, or audio paths may fail because they use settings for the original variant. With the patch, the device binds and playback and capture work on each path. For the reset dependency, warm-reboot an affected system from Windows into Ubuntu and run the playback test. Without the reset fix, output can sound abnormal. With the fix, output sounds normal. [Where problems could occur] The changes affect the Realtek SoundWire codec driver and the shared SoundWire codec table. Wrong variant detection or volume ranges could cause silent, distorted, or unexpectedly loud playback. Wrong pin or calibration settings could break headset detection or microphone capture. To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/2169378/+subscriptions