linux-kernel - Applied "ASoC: rockchip: pdm: fix regmap

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Date:   Thu,  4 Apr 2019 15:17:03 +0700 (+07)
From:   Mark Brown <broonie@...nel.org>
To:     Sugar Zhang <sugar.zhang@...k-chips.com>
Cc:     Mark Brown <broonie@...nel.org>, heiko@...ech.de,
        broonie@...nel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org, Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        linux-rockchip@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, alsa-devel@...a-project.org
Subject: Applied "ASoC: rockchip: pdm: fix regmap_ops hang issue" to the asoc tree

The patch

   ASoC: rockchip: pdm: fix regmap_ops hang issue

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From c85064435fe7a216ec0f0238ef2b8f7cd850a450 Mon Sep 17 00:00:00 2001
From: Sugar Zhang <sugar.zhang@...k-chips.com>
Date: Wed, 3 Apr 2019 21:40:45 +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.

Signed-off-by: Sugar Zhang <sugar.zhang@...k-chips.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
---
 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 400e29edb1c9..8a2e3bbce3a1 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;
 }
-- 
2.20.1