On 2022-06-24 3:52 PM, Pierre-Louis Bossart wrote:
On 6/24/22 08:43, Cezary Rojewski wrote:
Address the warning: "Codec: dpcm_be_connect: FE is nonatomic but BE is not, forcing BE as nonatomic" by marking BE DAI as nonatomic. Aligns with what is already done for FE DAIs.
This patchset iterates the change over all HSW and BDW related machine board drivers.
I don't think this is necessary, I was planning to demote this warning to a simple dev_dbg or possibly remove this message entirely.
The BE DAIs can perfectly be declared as non-atomic in all Intel machine drivers, except for SoundWire where there's a known delay during the .trigger.
Hmm.. that's a good feedback. Isn't ASoC's FE<->BE treated as a single PCM substream in sound/core/pcm_native.c though? If so, does it even make sense for card's BE DAI to be atomic, if it's FE counterpart is nonatomic already? Especially if it is specifying platform and cpu_dai that matches Intel's components which we know communicate using IPCs.
Warning is one thing, but will you be also getting rid of the if-statement in soc-pcm.c that actually forces nonatomic=1 on BE when FE is already declared as such? If the if-statement stays, I believe the declaring BE DAIs 'correctly' in the way to go.
Regards, Czarek