On 2019/5/25 上午12:12, Pierre-Louis Bossart wrote:
On 5/24/19 10:45 AM, Daniel Drake wrote:
Thanks for the patches!
On Fri, May 24, 2019 at 7:26 AM Pierre-Louis Bossart
<pierre-louis.bossart@xxxxxxxxxxxxxxx> wrote:
I am not sure if it's a good idea to enable this by default, the
experience of the first round showed it's risky to make assumptions on
what BIOS vendors implemented.
Can you clarify what you mean here, are you saying you don't want to
enable this new DMIC hardware support by default?
No. What I am saying is that
a) the legacy HDaudio driver does not support DMICs
b) the decision to abort the HDaudio legacy driver probe should not be
the default, since it depends on BIOS information that may be wrong
and on which I have *zero* control.
There are 4 cases really:
1. DMICs attached to PCH and BIOS/NHLT reports DMICS -> abort HDaudio
legacy probe
2. No DMICs attached to PCH and BIOS/NHLT does not report DMICs ->
continue probe and use HDAudio legacy.
3. DMICs attached to PCH and BIOS/NHLT does not report DMICs -> broken
config, we will need an option to abort the probe by force and ignore
the BIOS if you care about audio capture.
4. no DMICs attached to PCH and BIOS/NHLT reports DMICs -> broken
config, we need an option to ignore the BIOS and continue the probe.
Got it, we will do a test on a couple of machines, let us see if we can
meet 3 and 4 in reality.
Does this help?
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