linux-kernel - [PATCH] ASoC: tegra: update spdif tx_atn_lvl on hw

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Date:	Tue, 30 Oct 2012 18:23:59 +0400
From:	Dmitry Osipenko <digetx@...il.com>
To:	swarren@...dia.com
Cc:	digetx@...il.com, tiwai@...e.de, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ASoC: tegra: update spdif tx_atn_lvl on hw_params()

This prevents playing sound with wrong speed.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
I'm using deep sleep on my tablet and faced with this bug when played sound via
hdmi after suspend. I know that there is no deep sleep support in upstream kernel,
but will be nice to see that bug fixed.

 sound/soc/tegra/tegra20_spdif.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sound/soc/tegra/tegra20_spdif.c b/sound/soc/tegra/tegra20_spdif.c
index 3ebc867..24b46f1 100644
--- a/sound/soc/tegra/tegra20_spdif.c
+++ b/sound/soc/tegra/tegra20_spdif.c
@@ -114,6 +114,10 @@ static int tegra20_spdif_hw_params(struct snd_pcm_substream *substream,
 		return ret;
 	}
 
+	regmap_update_bits(spdif->regmap, TEGRA20_SPDIF_DATA_FIFO_CSR,
+			   TEGRA20_SPDIF_DATA_FIFO_CSR_TX_ATN_LVL_MASK,
+			   TEGRA20_SPDIF_DATA_FIFO_CSR_TX_ATN_LVL_TU4_WORD_FULL);
+
 	return 0;
 }
 
-- 
1.7.12

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