On Thu, 25 Mar 2021 13:12:48 +0100,
Kai-Heng Feng wrote:
>
> Rear Mic on Lenovo P620 cannot record after S3, despite that there's no
> error and the other two functions of the USB audio, Line In and Line
> Out, work just fine.
>
> The mic starts to work again after running userspace app like "alsactl
> store". Following the lead, the evidence shows that as soon as connector
> status is queried, the mic can work again.
>
> So also check connector value on resume to "wake up" the USB audio to
> make it functional.
>
> This can be device specific, however I think this generic approach may
> benefit more than one device.
>
> While at it, also remove reset-resume path to consolidate mixer resume
> path.
>
> Signed-off-by: Kai-Heng Feng <kai.heng.f...@canonical.com>
> ---
> v2:
> - Remove reset-resume.
> - Fold the connector checking to the mixer resume callback.
That's not what I meant exactly... I meant to put both into the
single resume callback, but handle each part conditionally depending
on reset_resume argument.
But this turned out to need more changes in mixer_quirks.c
unnecessarily. Maybe adding the two resume functions is a better
approach in the end, but not for the specific connection thing but
generically both resume and reset_resume callbacks. Something like
below.
thanks,
Takashi
diff --git a/sound/usb/mixer.c b/sound/usb/mixer.c
index b004b2e63a5d..1dab281bb269 100644
--- a/sound/usb/mixer.c
+++ b/sound/usb/mixer.c
@@ -3615,20 +3615,43 @@ static int restore_mixer_value(struct
usb_mixer_elem_list *list)
return 0;
}
+static int default_mixer_resume(struct usb_mixer_elem_list *list)
+{
+ struct usb_mixer_elem_info *cval = mixer_elem_list_to_info(list);
+
+ /* get connector value to "wake up" the USB audio */
+ if (cval->val_type == USB_MIXER_BOOLEAN && cval->channels == 1)
+ get_connector_value(cval, NULL, NULL);
+
+ return 0;
+}
+
+static int default_mixer_reset_resume(struct usb_mixer_elem_list *list)
+{
+ int err = default_mixer_resume(list);
+
+ if (err < 0)
+ return err;
+ return restore_mixer_value(list);
+}
+
int snd_usb_mixer_resume(struct usb_mixer_interface *mixer, bool reset_resume)
{
struct usb_mixer_elem_list *list;
+ usb_mixer_elem_resume_func_t f;
int id, err;
- if (reset_resume) {
- /* restore cached mixer values */
- for (id = 0; id < MAX_ID_ELEMS; id++) {
- for_each_mixer_elem(list, mixer, id) {
- if (list->resume) {
- err = list->resume(list);
- if (err < 0)
- return err;
- }
+ /* restore cached mixer values */
+ for (id = 0; id < MAX_ID_ELEMS; id++) {
+ for_each_mixer_elem(list, mixer, id) {
+ if (reset_resume)
+ f = list->reset_resume;
+ else
+ f = list->resume;
+ if (f) {
+ err = list->resume(list);
+ if (err < 0)
+ return err;
}
}
}
@@ -3647,6 +3670,7 @@ void snd_usb_mixer_elem_init_std(struct
usb_mixer_elem_list *list,
list->id = unitid;
list->dump = snd_usb_mixer_dump_cval;
#ifdef CONFIG_PM
- list->resume = restore_mixer_value;
+ list->resume = default_mixer_resume;
+ list->reset_resume = default_mixer_reset_resume;
#endif
}
diff --git a/sound/usb/mixer.h b/sound/usb/mixer.h
index c29e27ac43a7..e5a01f17bf3c 100644
--- a/sound/usb/mixer.h
+++ b/sound/usb/mixer.h
@@ -69,6 +69,7 @@ struct usb_mixer_elem_list {
bool is_std_info;
usb_mixer_elem_dump_func_t dump;
usb_mixer_elem_resume_func_t resume;
+ usb_mixer_elem_resume_func_t reset_resume;
};
/* iterate over mixer element list of the given unit id */
diff --git a/sound/usb/mixer_quirks.c b/sound/usb/mixer_quirks.c
index ffd922327ae4..b7f9c2fded05 100644
--- a/sound/usb/mixer_quirks.c
+++ b/sound/usb/mixer_quirks.c
@@ -151,7 +151,7 @@ static int add_single_ctl_with_resume(struct
usb_mixer_interface *mixer,
*listp = list;
list->mixer = mixer;
list->id = id;
- list->resume = resume;
+ list->reset_resume = resume;
kctl = snd_ctl_new1(knew, list);
if (!kctl) {
kfree(list);
