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authorDmitry Osipenko <digetx@gmail.com>2021-03-14 18:44:45 +0300
committerMark Brown <broonie@kernel.org>2021-03-18 13:49:32 +0000
commit0bbcecaaab15a74ba69f93df46c753f2a64eadca (patch)
treeaf818020b65351342068aa1b2158320870ac93ff /sound/soc/tegra
parent9c648ef82d7d4696e80b286d37dae07b67a9a32d (diff)
downloadlinux-0bbcecaaab15a74ba69f93df46c753f2a64eadca.tar.bz2
ASoC: tegra30: i2s: Restore hardware state on runtime PM resume
Tegra30 I2S driver syncs regmap cache only on resume from system suspend, but hardware is reset across the runtime suspend because RPM of the parent AHUB driver resets the I2S hardware, hence h/w state is lost after each RPM resume. The problem isn't visible because hardware happens to be fully reprogrammed after each RPM resume. Move hardware syncing to RPM resume in order to restore h/w state properly. Fixes: ed9ce1ed2239 ("ASoC: tegra: ahub: Reset hardware properly") Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Link: https://lore.kernel.org/r/20210314154459.15375-4-digetx@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/tegra')
-rw-r--r--sound/soc/tegra/tegra30_i2s.c40
1 files changed, 12 insertions, 28 deletions
diff --git a/sound/soc/tegra/tegra30_i2s.c b/sound/soc/tegra/tegra30_i2s.c
index 6740df541508..3d22c1be6f3d 100644
--- a/sound/soc/tegra/tegra30_i2s.c
+++ b/sound/soc/tegra/tegra30_i2s.c
@@ -58,8 +58,18 @@ static int tegra30_i2s_runtime_resume(struct device *dev)
}
regcache_cache_only(i2s->regmap, false);
+ regcache_mark_dirty(i2s->regmap);
+
+ ret = regcache_sync(i2s->regmap);
+ if (ret)
+ goto disable_clocks;
return 0;
+
+disable_clocks:
+ clk_disable_unprepare(i2s->clk_i2s);
+
+ return ret;
}
static int tegra30_i2s_set_fmt(struct snd_soc_dai *dai,
@@ -551,37 +561,11 @@ static int tegra30_i2s_platform_remove(struct platform_device *pdev)
return 0;
}
-#ifdef CONFIG_PM_SLEEP
-static int tegra30_i2s_suspend(struct device *dev)
-{
- struct tegra30_i2s *i2s = dev_get_drvdata(dev);
-
- regcache_mark_dirty(i2s->regmap);
-
- return 0;
-}
-
-static int tegra30_i2s_resume(struct device *dev)
-{
- struct tegra30_i2s *i2s = dev_get_drvdata(dev);
- int ret;
-
- ret = pm_runtime_get_sync(dev);
- if (ret < 0) {
- pm_runtime_put(dev);
- return ret;
- }
- ret = regcache_sync(i2s->regmap);
- pm_runtime_put(dev);
-
- return ret;
-}
-#endif
-
static const struct dev_pm_ops tegra30_i2s_pm_ops = {
SET_RUNTIME_PM_OPS(tegra30_i2s_runtime_suspend,
tegra30_i2s_runtime_resume, NULL)
- SET_SYSTEM_SLEEP_PM_OPS(tegra30_i2s_suspend, tegra30_i2s_resume)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
};
static struct platform_driver tegra30_i2s_driver = {