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ASoC: wm_adsp: Mimic legacy behaviour of reading controls when DSP is on

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Older firmwares don't specify access flags for the controls,
unfortunately the usage of some of these firmware relies on being able
to read back values from the DSP. The current control code will only do
this for volatile controls. This patch will read the control from the
hardware if no flags are specified and the control is currently
enabled, which should cover these legacy use-cases.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Charles Keepax 2015-12-17 10:05:59 +00:00 committed by Mark Brown
parent 168d10e74c
commit bc1765d6e8
1 changed files with 3 additions and 0 deletions
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3
sound/soc/codecs/wm_adsp.c
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@ -666,6 +666,9 @@ static int wm_coeff_get(struct snd_kcontrol *kctl,
else
ret = -EPERM;
} else {
if (!ctl->flags && ctl->enabled)
ret = wm_coeff_read_control(ctl, ctl->cache, ctl->len);
memcpy(p, ctl->cache, ctl->len);
}