From e222d0efb0c8ac10a266ac5bb9847446cfbe23f8 Mon Sep 17 00:00:00 2001 From: Sugar Zhang Date: Fri, 26 Jan 2018 17:20:51 +0800 Subject: [PATCH] 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. Change-Id: I86c04679c22e4763fd2539f88371ad1d33951723 Signed-off-by: Sugar Zhang --- 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 ab63e62c810c..f9f3f8008f1c 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; }