linux-kernel - [PATCH v3 1/4] ASoC: pcm512x: Fix not setting word length if DAIFMT_CBS

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Date:   Sun, 15 Nov 2020 13:23:03 +0100
From:   Kirill Marinushkin <kmarinushkin@...dec.com>
To:     Mark Brown <broonie@...nel.org>, Takashi Iwai <tiwai@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Peter Ujfalusi <peter.ujfalusi@...com>
Cc:     Matthias Reichl <hias@...us.com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        Kirill Marinushkin <kmarinushkin@...dec.com>
Subject: [PATCH v3 1/4] ASoC: pcm512x: Fix not setting word length if DAIFMT_CBS_CFS

In `pcm512x_hw_params()`, the following switch-case:

~~~~
	switch (pcm512x->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
~~~~

returns 0, which was preventing word length from being written into codecs
register.

Fixed by writing it into register before checking
`SND_SOC_DAIFMT_MASTER_MASK`.
Tested with Raspberry Pi + sound card `hifiberry_dacplus` in CBS_CFS format

Signed-off-by: Kirill Marinushkin <kmarinushkin@...dec.com>
Cc: Mark Brown <broonie@...nel.org>
Cc: Takashi Iwai <tiwai@...e.com>
Cc: Liam Girdwood <lgirdwood@...il.com>
Cc: Matthias Reichl <hias@...us.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>
Cc: Peter Ujfalusi <peter.ujfalusi@...com>
Cc: alsa-devel@...a-project.org
Cc: linux-kernel@...r.kernel.org
---
 sound/soc/codecs/pcm512x.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/pcm512x.c b/sound/soc/codecs/pcm512x.c
index 8153d3d01654..db3dc6a40feb 100644
--- a/sound/soc/codecs/pcm512x.c
+++ b/sound/soc/codecs/pcm512x.c
@@ -1195,6 +1195,13 @@ static int pcm512x_hw_params(struct snd_pcm_substream *substream,
 		return -EINVAL;
 	}
 
+	ret = regmap_update_bits(pcm512x->regmap, PCM512x_I2S_1,
+				 PCM512x_ALEN, alen);
+	if (ret != 0) {
+		dev_err(component->dev, "Failed to set frame size: %d\n", ret);
+		return ret;
+	}
+
 	switch (pcm512x->fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 	case SND_SOC_DAIFMT_CBS_CFS:
 		ret = regmap_update_bits(pcm512x->regmap,
@@ -1229,13 +1236,6 @@ static int pcm512x_hw_params(struct snd_pcm_substream *substream,
 		return -EINVAL;
 	}
 
-	ret = regmap_update_bits(pcm512x->regmap, PCM512x_I2S_1,
-				 PCM512x_ALEN, alen);
-	if (ret != 0) {
-		dev_err(component->dev, "Failed to set frame size: %d\n", ret);
-		return ret;
-	}
-
 	if (pcm512x->pll_out) {
 		ret = regmap_write(pcm512x->regmap, PCM512x_FLEX_A, 0x11);
 		if (ret != 0) {
-- 
2.13.6