On 10/2/2023 06:52, Mark Brown wrote:
On Mon, Oct 02, 2023 at 11:32:48AM +0200, Linux regression tracking (Thorsten Leemhuis) wrote:
Makes me wonder: How many more such quirk entries will be needed? Will
we have all machines listed soon, or do we expect that future Lenovo
hardware will need entries as well? If it's the latter: are quirks
really the right solution here, or do they just hide some bug or then
need for code that automatically handles things?
x86 firmware descriptions are terrible, it's just an endless procession
of quirks. The model for ACPI is not to describe key information in the
kernel and instead on Windows load device specific information from
separately supplied tables. On Linux that translates into these endless
quirks, on Windows it's platform specific drivers for otherwise generic
audio hardware.
I knew there was a TON of "82" prefix systems from Lenovo so it was an
educated guess that all of them needed DMIC support. This was incorrect
because one of them didn't have DMIC and that caused a no mic support
problem on that system.
So in the case of this seemingly endless list of systems being added to
enable DMIC support Mark is right, Windows does it differently.
With the "next" generation of hardware (Phoenix) both Windows and Linux
*should* be using the same _DSD, so hopefully we don't need more quirks
like this for those.
