[alsa-devel] [PATCH v1 01/12] ASoC: rockchip: pdm: fix regmap_ops hang issue

This is because set_fmt ops maybe called when PD is off, and in such case, regmap_ops will lead system hang. enale PD before doing regmap_ops.

Signed-off-by: Sugar Zhang sugar.zhang@rock-chips.com ---

sound/soc/rockchip/rockchip_pdm.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c index 400e29e..8a2e3bb 100644 --- a/sound/soc/rockchip/rockchip_pdm.c +++ b/sound/soc/rockchip/rockchip_pdm.c @@ -208,7 +208,9 @@ static int rockchip_pdm_set_fmt(struct snd_soc_dai *cpu_dai, return -EINVAL; }

+ pm_runtime_get_sync(cpu_dai->dev); regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, mask, val); + pm_runtime_put(cpu_dai->dev);

return 0; }