On 29. 10. 21 17:08, Sameer Pujar wrote:
On 10/26/2021 11:53 AM, Sameer Pujar wrote:
On 10/25/2021 6:28 PM, Jaroslav Kysela wrote:
On 25. 10. 21 13:06, Sameer Pujar wrote:
@@ -150,11 +186,22 @@ static int tegra210_mvc_put_mute(struct snd_kcontrol *kcontrol,
...
return 1;
It's a bit unrelated comment to this change, but it may be worth to verify all kcontrol put callbacks in the tegra code. Ensure that value 1 is returned only when something was really changed in hardware.
There are cases when the mixer control update is not immediately written to HW, instead the update is ACKed (stored in variable) and writen to HW at a later point of time. Do these cases qualify for "return 1" as well?
Yes - assuming that the get callback returns the cached value. The get/put implementation should be consistent from the caller view. The driver implementation (delayed write) is a separate thing.
Jaroslav