[PATCH 3.10 31/71] ASoC: samsung: Correct I2S DAI suspend/resume ops
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2014-09-15 20:04:51
Also in:
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3.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sylwester Nawrocki <s.nawrocki@samsung.com> commit d3d4e5247b013008a39e4d5f69ce4c60ed57f997 upstream. We should save/restore relevant I2S registers regardless of the dai->active flag, otherwise some settings are being lost after system suspend/resume cycle. E.g. I2S slave mode set only during dai initialization is not preserved and the device ends up in master mode after system resume. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mark Brown <redacted> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- sound/soc/samsung/i2s.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-)
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c@@ -853,11 +853,9 @@ static int i2s_suspend(struct snd_soc_da { struct i2s_dai *i2s = to_info(dai); - if (dai->active) { - i2s->suspend_i2smod = readl(i2s->addr + I2SMOD); - i2s->suspend_i2scon = readl(i2s->addr + I2SCON); - i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR); - } + i2s->suspend_i2smod = readl(i2s->addr + I2SMOD); + i2s->suspend_i2scon = readl(i2s->addr + I2SCON); + i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR); return 0; }
@@ -866,11 +864,9 @@ static int i2s_resume(struct snd_soc_dai { struct i2s_dai *i2s = to_info(dai); - if (dai->active) { - writel(i2s->suspend_i2scon, i2s->addr + I2SCON); - writel(i2s->suspend_i2smod, i2s->addr + I2SMOD); - writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR); - } + writel(i2s->suspend_i2scon, i2s->addr + I2SCON); + writel(i2s->suspend_i2smod, i2s->addr + I2SMOD); + writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR); return 0; }