On Thu, Jul 02, 2020 at 10:42:21AM -0500, Pierre-Louis Bossart wrote:
On 7/2/20 6:18 AM, Mark Brown wrote:
On Wed, Jul 01, 2020 at 09:21:24PM -0400, Sasha Levin wrote:
From: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com
[ Upstream commit c8d2e2bfaeffa0f914330e8b4e45b986c8d30b58 ]
Usually the DSP is not traditionally enabled on H skews but this might be used moving forward.
"This might be used moving forward"?
There are two conditions for the SOF driver to be used in a distro: a) the DSP needs to be enabled (as reported by the pci class info) b) sound/hda/intel-dsp-config.c needs to contain a quirk to select SOF over the legacy HDaudio, such as presence of DMIC/SoundWire or a known vendor DMI.
Traditionally for desktops neither a) nor b) are true, but this is changing: we will start adding quirks for specific product lines as requested by OEMs.
Does this answer to your question?
The question was more of a why is this being backported one - without those extra quirks this does nothing, and frankly with them it seems like a *major* change someone might see in stable if they update their kernel and it suddenly switches to an entirely different DSP software stack.