On 05. 01. 23 13:36, Kai-Heng Feng wrote:
On Mon, Aug 15, 2022 at 3:55 PM Kai-Heng Feng
<kai.heng.feng@xxxxxxxxxxxxx> wrote:
On Wed, Jul 20, 2022 at 9:31 PM Pierre-Louis Bossart
<pierre-louis.bossart@xxxxxxxxxxxxxxx> wrote:
On 7/20/22 02:52, Jaroslav Kysela wrote:
Dne 20. 07. 22 v 3:45 Kai-Heng Feng napsal(a):
On Tue, Jul 19, 2022 at 11:41 PM Jaroslav Kysela <perex@xxxxxxxx> wrote:
Dne 19. 07. 22 v 16:47 Kai-Heng Feng napsal(a):
On HP laptops that use SOF driver for DMIC, the micmute LED doesn't
light up when mic is muted after commit 9b014266ef8a ("ASoC: SOF:
topology: use new sound control LED layer").
The micmute LED itself is still working via sysfs, but it doesn't follow
mute anymore. That's because unlike vendors like Dell and Lenovo, HP
laptops use HDA codec to control mute LEDs instead of ACPI. So on HP
laptops, both SOF and HDA create captures with
SNDRV_CTL_ELEM_ACCESS_MIC_LED access, snd_ctl_led_set_state() considers
there are two different kcontrols and one of them is not muted.
It does not mean that it's a wrong behavior. When both controls are muted, the
LED should be turned on. It just requires that all inputs are off (and it may
be the default - probably we can set in UCM or so). If you turn the "Capture
Switch" off in amixer / alsamixer, do things work as expected ?
Yes. When all captures are muted the micmute LED is on.
So skip creating captures for HDA when it's called from SOF, the
captures are already handled by SOF.
The capture controls are for other inputs like external analog microphone. If
it is required to suppress the MIC LED for some hardware, just skip the
"spec->mic_mute_led = 1" assignment in hda_generic.c . Also, the check
"codec->core.type != HDA_DEV_ASOC" is not sufficient, because you don't know,
if the topology really sets the MIC LED flag.
AFAIK the external analog microphone on DMIC laptop is driven by SOF driver too.
If those capture controls are indeed needed for external analog mics,
use UCM to mute them by default won't work either.
Could you describe this ? I though that only DMIC is handled by SOF when HDA
codec is in the system. There is a separate analog codec for external analog
microphone or the HDA codec is somehow connected to SOF/DSP ? If so, how ?
The HDA codec is connected in the same way in all cases, there's no
hardware/electrical/routing difference.
When used, the SOF driver will handle ALL links, be they DMIC or
HDAudio. The difference for HDaudio is that instead of a single DMA
transfer (DDR->FIFO), we have a first 'Host' DMA into the DSP SRAM, some
processing and a second 'Link' DMA from DSP SRAM to the HDaudio FIFO
(reversed flow for capture).
So is this approach sufficient for this issue? Or should I explore
other possibilities?
A gentle ping...
This Mic LED problem was resolved through UCM for the moment:
https://github.com/alsa-project/alsa-ucm-conf/commit/79a8ec44d3dcf097f4a4492c506cbcf338324175
More discussion:
https://bugzilla.redhat.com/show_bug.cgi?id=2134824
Jaroslav
--
Jaroslav Kysela <perex@xxxxxxxx>
Linux Sound Maintainer; ALSA Project; Red Hat, Inc.
