Jorijn van der Graaf
d571dd42d3
The DAPM power-up sequence runs during snd_pcm prepare, but the BE
port graph is only started at trigger time. A codec that powers up
synchronously from a DAPM widget event and needs a running bit clock
at that point - such as aw88261 since commit caea99ac809d ("ASoC:
codecs: aw88261: remove async start") - can therefore never see a
live clock: its power-up check runs before the trigger and fails on
every stream start.
Start the graph at the end of prepare instead, mirroring what
q6afe_dai_prepare() does on the legacy stack, so the interface
clocks already run when DAPM powers up the codec. The FE side
already starts its own graph at prepare in q6apm_dai_prepare();
only the BE waited for trigger. The trigger-time start is kept as
a fallback, guarded by is_port_started.
Tested on the Fairphone (Gen. 6) - 2x aw88261 on Senary MI2S:
without this the amplifiers fail to power up with SYSST reporting
"no clock" on every stream start; with it they start synchronously,
including for the first short stream of the boot.
Assisted-by: Claude:claude-fable-5
Signed-off-by: Jorijn van der Graaf <jorijnvdgraaf@catcrafts.net>
|
||
|---|---|---|
| .. | ||
| ac97 | ||
| aoa | ||
| arm | ||
| atmel | ||
| core | ||
| drivers | ||
| firewire | ||
| hda | ||
| i2c | ||
| isa | ||
| mips | ||
| oss | ||
| parisc | ||
| pci | ||
| pcmcia | ||
| ppc | ||
| sh | ||
| soc | ||
| sparc | ||
| spi | ||
| synth | ||
| usb | ||
| virtio | ||
| x86 | ||
| xen | ||
| ac97_bus.c | ||
| Kconfig | ||
| last.c | ||
| Makefile | ||
| sound_core.c | ||