Messages in this thread Patch in this message | | | From | Sugar Zhang <> | Subject | [PATCH v1 01/12] ASoC: rockchip: pdm: fix regmap_ops hang issue | Date | Wed, 3 Apr 2019 21:40:45 +0800 |
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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; } -- 2.7.4
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