Public bug reported:
SRU Jusitification for Kernel
[Impact]
Add a driver for the Cirrus Logic CS35L56 amplifier. This is not a standalone
HDA device; it provides control of the CS35L56 for systems that use a
combination of an HDA codec and CS35L56 amplifiers with audio routed through
the HDA codec. If it's not enabled on HDA codec with this amplifier, there will
be no sound if play audio via built-in speaker.
[Fix]
Backport the CS35L56 driver from kernel 6.9-rc
[Test Case]
1. Install the kernel w/ CS35L56 driver enabled
2. Install the linux-firmware with latest CS35l56 supported
3. Play audio file on machines w/ CS35L56 amplifier and make sure it's OK
[Where problems could occur]
Only affects models which have CS35L56 amplifier. Should be no risk to others.
=========================================================================================
SRU Jusitification for linux-firmware
[Impact]
No sound if no CS35L56 firmware even the driver is enabled in Linux kernel.
[Fix]
Add release FW binary of CS35L56 to linux-firmware
[Test Case]
1. Install the kernel w/ CS35L56 driver enabled
2. Install the linux-firmware with latest CS35l56 supported
3. Play audio file on machines w/ CS35L56 amplifier and make sure it's OK
[Where problems could occur]
New firmware is only loaded by the CS35L56, we only need to verify it on the
target platform.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux-oem-6.5 (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Affects: linux-oem-6.5 (Ubuntu Jammy)
Importance: Undecided
Status: In Progress
** Affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Affects: linux-oem-6.5 (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.5 (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.5 (Ubuntu Noble)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux-oem-6.5 (Ubuntu Jammy)
Importance: Undecided
Status: New
** Changed in: linux-oem-6.5 (Ubuntu Jammy)
Status: New => In Progress
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https://bugs.launchpad.net/bugs/2062135
Title:
Add Cirrus Logic CS35L56 amplifier support
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