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From: Markus Pargmann <mpa@pengutronix.de>
To: Mark Brown <broonie@kernel.org>
Cc: Fabio Estevam <fabio.estevam@freescale.com>,
	alsa-devel@alsa-project.org, Timur Tabi <timur@tabi.org>,
	kernel@pengutronix.de, Nicolin Chen <Guangyu.Chen@freescale.com>,
	Markus Pargmann <mpa@pengutronix.de>,
	linux-arm-kernel@lists.infradead.org
Subject: [PATCH 14/15] ASoC: fsl-ssi: Transmit enable synchronization
Date: Wed, 26 Feb 2014 17:02:17 +0100	[thread overview]
Message-ID: <1393430538-32333-15-git-send-email-mpa@pengutronix.de> (raw)
In-Reply-To: <1393430538-32333-1-git-send-email-mpa@pengutronix.de>

When the fsl-ssi unit is used in i2s slave mode, it is possible that the
SSI unit starts transmitting data on the wrong channel. This happens
because the SSI does not synchronize with the left-right-clock by
default.

This patch enables transmit enable synchronization.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
 sound/soc/fsl/fsl_ssi.c | 1 +
 sound/soc/fsl/fsl_ssi.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 56dbd77..3b0dffd 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -615,6 +615,7 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private,
 	regmap_read(regs, CCSR_SSI_SCR, &scr);
 	scr &= ~(CCSR_SSI_SCR_SYN | CCSR_SSI_SCR_I2S_MODE_MASK);
 	scr |= CCSR_SSI_SCR_NET;
+	scr |= CCSR_SSI_SCR_SYNC_TX_FS;
 
 	mask = CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFDIR | CCSR_SSI_STCR_TXDIR |
 		CCSR_SSI_STCR_TSCKP | CCSR_SSI_STCR_TFSI | CCSR_SSI_STCR_TFSL |
diff --git a/sound/soc/fsl/fsl_ssi.h b/sound/soc/fsl/fsl_ssi.h
index d5b7feb..5065105 100644
--- a/sound/soc/fsl/fsl_ssi.h
+++ b/sound/soc/fsl/fsl_ssi.h
@@ -37,6 +37,7 @@
 #define CCSR_SSI_SACCEN			0x54
 #define CCSR_SSI_SACCDIS		0x58
 
+#define CCSR_SSI_SCR_SYNC_TX_FS		0x00001000
 #define CCSR_SSI_SCR_RFR_CLK_DIS	0x00000800
 #define CCSR_SSI_SCR_TFR_CLK_DIS	0x00000400
 #define CCSR_SSI_SCR_TCH_EN		0x00000100
-- 
1.8.5.3

WARNING: multiple messages have this Message-ID
From: mpa@pengutronix.de (Markus Pargmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 14/15] ASoC: fsl-ssi: Transmit enable synchronization
Date: Wed, 26 Feb 2014 17:02:17 +0100	[thread overview]
Message-ID: <1393430538-32333-15-git-send-email-mpa@pengutronix.de> (raw)
In-Reply-To: <1393430538-32333-1-git-send-email-mpa@pengutronix.de>

When the fsl-ssi unit is used in i2s slave mode, it is possible that the
SSI unit starts transmitting data on the wrong channel. This happens
because the SSI does not synchronize with the left-right-clock by
default.

This patch enables transmit enable synchronization.

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
 sound/soc/fsl/fsl_ssi.c | 1 +
 sound/soc/fsl/fsl_ssi.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 56dbd77..3b0dffd 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -615,6 +615,7 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private,
 	regmap_read(regs, CCSR_SSI_SCR, &scr);
 	scr &= ~(CCSR_SSI_SCR_SYN | CCSR_SSI_SCR_I2S_MODE_MASK);
 	scr |= CCSR_SSI_SCR_NET;
+	scr |= CCSR_SSI_SCR_SYNC_TX_FS;
 
 	mask = CCSR_SSI_STCR_TXBIT0 | CCSR_SSI_STCR_TFDIR | CCSR_SSI_STCR_TXDIR |
 		CCSR_SSI_STCR_TSCKP | CCSR_SSI_STCR_TFSI | CCSR_SSI_STCR_TFSL |
diff --git a/sound/soc/fsl/fsl_ssi.h b/sound/soc/fsl/fsl_ssi.h
index d5b7feb..5065105 100644
--- a/sound/soc/fsl/fsl_ssi.h
+++ b/sound/soc/fsl/fsl_ssi.h
@@ -37,6 +37,7 @@
 #define CCSR_SSI_SACCEN			0x54
 #define CCSR_SSI_SACCDIS		0x58
 
+#define CCSR_SSI_SCR_SYNC_TX_FS		0x00001000
 #define CCSR_SSI_SCR_RFR_CLK_DIS	0x00000800
 #define CCSR_SSI_SCR_TFR_CLK_DIS	0x00000400
 #define CCSR_SSI_SCR_TCH_EN		0x00000100
-- 
1.8.5.3

  parent reply	other threads:[~2014-02-26 16:02 UTC|newest]

Thread overview: 44+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-02-26 16:02 [PATCH 00/15] ASoC: fsl-ssi: Driver cleanup Markus Pargmann
2014-02-26 16:02 ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 01/15] ASoC: fsl-ssi: Use regmap Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-27  2:08   ` Li.Xiubo
2014-02-27  2:08     ` Li.Xiubo at freescale.com
2014-02-27 15:23     ` Markus Pargmann
2014-02-27 15:23       ` Markus Pargmann
2014-02-27 16:06       ` Timur Tabi
2014-02-27 16:06         ` Timur Tabi
2014-03-05  6:21     ` Mark Brown
2014-03-05  6:21       ` Mark Brown
2014-03-05  7:04       ` Li.Xiubo
2014-03-05  7:04         ` Li.Xiubo at freescale.com
2014-03-05  7:07       ` Li.Xiubo
2014-03-05  7:07         ` Li.Xiubo at freescale.com
2014-02-26 16:02 ` [PATCH 02/15] ASoC: fsl-ssi: Remove fsl_ssi_setup Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 03/15] ASoC: fsl-ssi: Move debugging to seperate file Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 04/15] ASoC: fsl-ssi: Use dev_name for DAI driver struct Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 05/15] ASoC: fsl-ssi: Move imx-specific probe to seperate function Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 06/15] ASoC: fsl-ssi: Remove useless DMA code Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 07/15] ASoC: fsl-ssi: baud clock error handling Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 08/15] ASoC: fsl-ssi: Cleanup probe function Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 09/15] ASoC: fsl-ssi: Remove unnecessary variables from ssi_private Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 10/15] ASoC: fsl-ssi: reorder and document fsl_ssi_private Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 11/15] ASoC: fsl-ssi: Fix register values when disabling Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 12/15] ASoC: fsl-ssi: Only enable baudclk when used Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` [PATCH 13/15] ASoC: fsl-ssi: Set default dai-fmts Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann
2014-02-26 16:02 ` Markus Pargmann [this message]
2014-02-26 16:02   ` [PATCH 14/15] ASoC: fsl-ssi: Transmit enable synchronization Markus Pargmann
2014-02-26 16:02 ` [PATCH 15/15] ASoC: fsl-ssi: Update binding documentation Markus Pargmann
2014-02-26 16:02   ` Markus Pargmann

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