From: Chen Liangjun <b36089@freescale.com>
Date: Wed, 18 Jul 2012 03:11:39 +0000 (+0800)
Subject: ENGR00217509 ASRC:Use ideal ratio mode for p2p playback
X-Git-Tag: v3.0.35-fsl~742
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=174548b7c5a3e88ba187a56812ad01999743ec76;p=karo-tx-linux.git

ENGR00217509 ASRC:Use ideal ratio mode for p2p playback

When use ESAI p2p playback, ASRC is configured no ratio mode.
Due to an IC bug(TKT117009), user may hear noise sometimes.

In this patch, use ideal ratio mode for ESAI p2p playback to avoid
 noise.

Signed-off-by: Chen Liangjun <b36089@freescale.com>
---

diff --git a/drivers/mxc/asrc/mxc_asrc.c b/drivers/mxc/asrc/mxc_asrc.c
index db20cbf2971a..4ef31c8fd6db 100644
--- a/drivers/mxc/asrc/mxc_asrc.c
+++ b/drivers/mxc/asrc/mxc_asrc.c
@@ -583,6 +583,26 @@ int asrc_config_pair(struct asrc_config *config)
 		}
 	}
 
+	if ((config->inclk == INCLK_ASRCK1_CLK) &&
+			(config->outclk == OUTCLK_ESAI_TX)) {
+		reg = __raw_readl(g_asrc->vaddr + ASRC_ASRCTR_REG);
+		reg &= ~(1 << (20 + config->pair));
+		reg |= (0x03 << (13 + (config->pair << 1)));
+		__raw_writel(reg, g_asrc->vaddr + ASRC_ASRCTR_REG);
+		err = asrc_set_clock_ratio(config->pair,
+					   config->input_sample_rate,
+					   config->output_sample_rate);
+		if (err < 0)
+			return err;
+
+		err = asrc_set_process_configuration(config->pair,
+						     config->input_sample_rate,
+						     config->
+						     output_sample_rate);
+		if (err < 0)
+			return err;
+	}
+
 	/* Config input and output wordwidth */
 	reg = __raw_readl(
 		g_asrc->vaddr + ASRC_ASRMCR1A_REG + (config->pair << 2));