linux-kernel - [PATCH 4.9 74/93] ASoC: rt5645: set sel_i2s_pre

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Date:   Wed,  9 Aug 2017 11:14:07 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Bard Liao <bardliao@...ltek.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <alexander.levin@...izon.com>
Subject: [PATCH 4.9 74/93] ASoC: rt5645: set sel_i2s_pre_div1 to 2

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bard Liao <bardliao@...ltek.com>


[ Upstream commit 02c5c03283c52157d336abf5e44ffcda10579fbf ]

The i2s clock pre-divider 1 is used for both i2s1 and sysclk.
The i2s1 is usually used for the main i2s and the pre-divider
will be set in hw_params function.

However, if i2s2 is used, the pre-divider is not set in the hw_params
function and the default value of i2s clock pre-divider 1 is too high
for sysclk and DMIC usage. Fix by overriding default divider value to 2.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=95681
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Signed-off-by: Bard Liao <bardliao@...ltek.com>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...izon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/soc/codecs/rt5645.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/sound/soc/codecs/rt5645.c
+++ b/sound/soc/codecs/rt5645.c
@@ -3833,6 +3833,9 @@ static int rt5645_i2c_probe(struct i2c_c
 		}
 	}
 
+	regmap_update_bits(rt5645->regmap, RT5645_ADDA_CLK1,
+		RT5645_I2S_PD1_MASK, RT5645_I2S_PD1_2);
+
 	if (rt5645->pdata.jd_invert) {
 		regmap_update_bits(rt5645->regmap, RT5645_IRQ_CTRL2,
 			RT5645_JD_1_1_MASK, RT5645_JD_1_1_INV);