Asoc: Samsung: Add I2S S/W RST in startup function

I2S module need to be reset after S2R. Keeping the S/W rst
control part in resume didn't help in playing audio after resume.
So this patch adds S/W RST control part in startup function which
gets triggered for every new audio stream playback.

BUG=chrome-os-partner:12579
TEST=tested by playing audio before suspend and after resume
using aplay command.

Change-Id: I27aa97da2c7c6cb42e24d19bf41f294732cfbd6e
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/31335
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Alim Akhtar <alim.akhtar@samsung.com>
Commit-Ready: Alim Akhtar <alim.akhtar@samsung.com>

diff --git a/sound/soc/samsung/i2s.c b/sound/soc/samsung/i2s.c
index 4220efb..a47fd34 100644 (file)
--- a/sound/soc/samsung/i2s.c
+++ b/sound/soc/samsung/i2s.c
@@ -662,6 +662,9 @@ static int i2s_startup(struct snd_pcm_substream *substream,
        /* Enforce set_sysclk in Master mode */
        i2s->rclk_srcrate = 0;
 
+       if (i2s->quirks & QUIRK_NEED_RSTCLR)
+               writel(CON_RSTCLR, i2s->addr + I2SCON);
+
        spin_unlock_irqrestore(&lock, flags);
 
        return 0;