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ASoC: samsung: i2s: Ensure the RCLK rate is properly determined

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[ Upstream commit 647d04f8e07afc7c3b7a42b3ee01a8b28db29631 ]

If the RCLK mux clock configuration is specified in DT and no set_sysclk()
callback is used in the sound card driver the sclk_srcrate field will remain
set to 0, leading to an incorrect PSR divider setting.
To fix this the frequency value is retrieved from the CLK_I2S_RCLK_SRC clock,
so the actual RCLK mux selection is taken into account.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sylwester Nawrocki 2018-02-05 16:43:56 +01:00 committed by Greg Kroah-Hartman
parent 27cbb1df79
commit 9311d0b6b4
1 changed files with 11 additions and 2 deletions
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13
sound/soc/samsung/i2s.c
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@ -653,8 +653,12 @@ static int i2s_set_fmt(struct snd_soc_dai *dai,
tmp |= mod_slave;
break;
case SND_SOC_DAIFMT_CBS_CFS:
/* Set default source clock in Master mode */
if (i2s->rclk_srcrate == 0)
/*
* Set default source clock in Master mode, only when the
* CLK_I2S_RCLK_SRC clock is not exposed so we ensure any
* clock configuration assigned in DT is not overwritten.
*/
if (i2s->rclk_srcrate == 0 && i2s->clk_data.clks == NULL)
i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
0, SND_SOC_CLOCK_IN);
break;
@ -878,6 +882,11 @@ static int config_setup(struct i2s_dai *i2s)
return 0;
if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
struct clk *rclksrc = i2s->clk_table[CLK_I2S_RCLK_SRC];
if (i2s->rclk_srcrate == 0 && rclksrc && !IS_ERR(rclksrc))
i2s->rclk_srcrate = clk_get_rate(rclksrc);
psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
dev_dbg(&i2s->pdev->dev,