Hi Lars-Peter Thank you for your feedback >> I wonder do we need both (X) (Y) ? >> I think we can merge (A) and (B) (= find Codec/CPU max sig_bits), >> and call soc_pcm_set_msb() once, but am I misunderstand ? > We need both. Or alternatively you could write > soc_pcm_set_msb(substream, min(bits, cpu_bits)). > > What this does is it computes the maximum msb bits from both the CPU > side and the CODEC side and then sets the msb bits reported to userspace > to the minimum of the two. > > The largest number of MSBs we'll see on the CODEC side is the max() and > the largest number of MSBs we'll see on the CPU side is the max(). And > the number of MSBs that the application will be able to see is the > smaller of the two. Oh, yes. thank you for explaining details. I think snd_pcm_hw_rule_msbits() was the point. Best regards --- Kuninori Morimoto
