hi dapm developers,
I have a question about "playback_widget".
Nobody gives me right answer, so email the question to devel maillist.
I am sorry to disturb you and thanks for your explain
Question:
my machine driver export two pcm devices, eg. "pcm0", "pcm1".
Open the "pcm0" for Playback, just active AIF3 playback_widget "AIF3 Playbck".
at same time，one path of pcm1 is also power on。
the path is “Headset Mic -> IN3R -> AIF1TX Input 1 -> AIF1TX Mixer -> AIF1TX -> AIF1 Playbck -> AIF1RX1 -> Headphone Input 1 -> Headphone Mixer -> Headphone”
my question is "the widgets of the path should be powered or not ?"
I guess that the path should not be powered, because "pcm1" is not open, all paths of it should not be actvie.
Maybe I am wrong， but let me known.
Thank you very much!
***************************************************************case snd_soc_dapm_dai_in: w->power_check = dapm_dac_check_power;
/* Check to see if a DAC has power */static int dapm_dac_check_power(struct snd_soc_dapm_widget *w){ int out;
DAPM_UPDATE_STAT(w, power_checks);
if (w->active) { out = is_connected_output_ep(w, NULL); dapm_clear_walk_output(w->dapm, &w->sinks); return out != 0; } else { return dapm_generic_check_power(w); }} ***************************************************************