Patch "ASoC: tlv320aic31xx: Handle inverted BCLK in non-DSP modes" has been added to the 4.14-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    ASoC: tlv320aic31xx: Handle inverted BCLK in non-DSP modes

to the 4.14-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     asoc-tlv320aic31xx-handle-inverted-bclk-in-non-dsp-modes.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


From foo@baz Mon 11 Nov 2019 10:07:22 AM CET
From: Mathieu Poirier <mathieu.poirier@linaro.org>
Date: Thu,  5 Sep 2019 10:17:47 -0600
Subject: ASoC: tlv320aic31xx: Handle inverted BCLK in non-DSP modes
To: stable@vger.kernel.org
Cc: linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org, linux-pci@vger.kernel.org, linux-mtd@lists.infradead.org
Message-ID: <20190905161759.28036-7-mathieu.poirier@linaro.org>

From: "Andrew F. Davis" <afd@ti.com>

commit dcb407b257af06fa58b0544ec01ec9e0d3927e02 upstream

Currently BCLK inverting is only handled when the DAI format is
DSP, but the BCLK may be inverted in any supported mode. Without
this using this CODEC in any other mode than DSP with the BCLK
inverted leads to bad sampling timing and very poor audio quality.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/soc/codecs/tlv320aic31xx.c |   28 ++++++++++++++++++----------
 1 file changed, 18 insertions(+), 10 deletions(-)

--- a/sound/soc/codecs/tlv320aic31xx.c
+++ b/sound/soc/codecs/tlv320aic31xx.c
@@ -924,6 +924,18 @@ static int aic31xx_set_dai_fmt(struct sn
 		return -EINVAL;
 	}
 
+	/* signal polarity */
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		iface_reg2 |= AIC31XX_BCLKINV_MASK;
+		break;
+	default:
+		dev_err(codec->dev, "Invalid DAI clock signal polarity\n");
+		return -EINVAL;
+	}
+
 	/* interface format */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
@@ -931,16 +943,12 @@ static int aic31xx_set_dai_fmt(struct sn
 	case SND_SOC_DAIFMT_DSP_A:
 		dsp_a_val = 0x1;
 	case SND_SOC_DAIFMT_DSP_B:
-		/* NOTE: BCLKINV bit value 1 equas NB and 0 equals IB */
-		switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
-		case SND_SOC_DAIFMT_NB_NF:
-			iface_reg2 |= AIC31XX_BCLKINV_MASK;
-			break;
-		case SND_SOC_DAIFMT_IB_NF:
-			break;
-		default:
-			return -EINVAL;
-		}
+		/*
+		 * NOTE: This CODEC samples on the falling edge of BCLK in
+		 * DSP mode, this is inverted compared to what most DAIs
+		 * expect, so we invert for this mode
+		 */
+		iface_reg2 ^= AIC31XX_BCLKINV_MASK;
 		iface_reg1 |= (AIC31XX_DSP_MODE <<
 			       AIC31XX_IFACE1_DATATYPE_SHIFT);
 		break;


Patches currently in stable-queue which might be from mathieu.poirier@linaro.org are

queue-4.14/mailbox-reset-txdone_method-txdone_by_poll-if-client-knows_txdone.patch
queue-4.14/mtd-spi-nor-cadence-quadspi-add-a-delay-in-write-sequence.patch
queue-4.14/misc-pci_endpoint_test-fix-bug_on-error-during-pci_disable_msi.patch
queue-4.14/asoc-tlv320dac31xx-mark-expected-switch-fall-through.patch
queue-4.14/pci-dra7xx-add-shutdown-handler-to-cleanly-turn-off-clocks.patch
queue-4.14/asoc-tlv320aic31xx-handle-inverted-bclk-in-non-dsp-modes.patch
queue-4.14/mtd-spi-nor-enable-4b-opcodes-for-mx66l51235l.patch
queue-4.14/cpufreq-ti-cpufreq-add-missing-of_node_put.patch
queue-4.14/asoc-davinci-kill-bug_on-usage.patch
queue-4.14/mfd-palmas-assign-the-right-powerhold-mask-for-tps65917.patch
queue-4.14/asoc-davinci-mcasp-fix-an-error-handling-path-in-davinci_mcasp_probe.patch
queue-4.14/misc-pci_endpoint_test-prevent-some-integer-overflows.patch
queue-4.14/asoc-davinci-mcasp-handle-return-value-of-devm_kasprintf.patch
queue-4.14/i2c-omap-trigger-bus-recovery-in-lockup-case.patch
queue-4.14/usb-dwc3-allow-disabling-of-metastability-workaround.patch

______________________________________________________
Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/