On 29/06/2023 18:42, Mark Brown wrote:
On Thu, Jun 29, 2023 at 06:33:09PM +0100, Srinivas Kandagatla wrote:
On 29/06/2023 16:43, Mark Brown wrote:
On Wed, Jun 28, 2023 at 10:24:04AM +0100, Srinivas Kandagatla wrote:
For some reason we ended up with a setup without this flag.
This resulted in inconsistent sound card devices numbers which
are also not starting as expected at dai_link->id.
(Ex: MultiMedia1 pcm ended up with device number 4 instead of 0)
Why is this a problem?
In existing Qualcomm setup the backend pcm are added first, which results in
frontend pcms getting pcm numbers after this.
For example: with 3 backend dailinks in DT we have frontend pcm start at 3.
Now if we add new backend dai-link in DT we now have frontend pcm start at
4.
This is a bug in qualcomm driver.
Why is this an actual problem rather than just being a bit ugly? What
is the negative consequence of having a PCM with this number?
Yes, it is ugly but also breaks the existing UCM as the pcm device
numbers keep changing.
Which is why I refereed it as bug in the driver.
--srini
