linux-kernel - [PATCH 1/1] ASoC: fsl: fsl_qmc_audio: Fix snd_pcm_format

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Message-ID: <20230726161620.495298-1-herve.codina@bootlin.com>
Date:   Wed, 26 Jul 2023 18:16:20 +0200
From:   Herve Codina <herve.codina@...tlin.com>
To:     Herve Codina <herve.codina@...tlin.com>,
        Shengjiu Wang <shengjiu.wang@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     alsa-devel@...a-project.org, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: [PATCH 1/1] ASoC: fsl: fsl_qmc_audio: Fix snd_pcm_format_t values handling

Running sparse on fsl_qmc_audio (make C=1) raises the following warnings:
 fsl_qmc_audio.c:387:26: warning: restricted snd_pcm_format_t degrades to integer
 fsl_qmc_audio.c:389:59: warning: incorrect type in argument 1 (different base types)
 fsl_qmc_audio.c:389:59:    expected restricted snd_pcm_format_t [usertype] format
 fsl_qmc_audio.c:389:59:    got unsigned int [assigned] i
 fsl_qmc_audio.c:564:26: warning: restricted snd_pcm_format_t degrades to integer
 fsl_qmc_audio.c:569:50: warning: incorrect type in argument 1 (different base types)
 fsl_qmc_audio.c:569:50:    expected restricted snd_pcm_format_t [usertype] format
 fsl_qmc_audio.c:569:50:    got int [assigned] i
 fsl_qmc_audio.c:573:62: warning: incorrect type in argument 1 (different base types)
 fsl_qmc_audio.c:573:62:    expected restricted snd_pcm_format_t [usertype] format
 fsl_qmc_audio.c:573:62:    got int [assigned] i

These warnings are due to snd_pcm_format_t values handling done in the
driver. Some macros and functions exist to handle safely these values.

Use dedicated macros and functions to remove these warnings.

Fixes: 075c7125b11c ("ASoC: fsl: Add support for QMC audio")
Signed-off-by: Herve Codina <herve.codina@...tlin.com>
---
 sound/soc/fsl/fsl_qmc_audio.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/sound/soc/fsl/fsl_qmc_audio.c b/sound/soc/fsl/fsl_qmc_audio.c
index 7cbb8e4758cc..56d6b0b039a2 100644
--- a/sound/soc/fsl/fsl_qmc_audio.c
+++ b/sound/soc/fsl/fsl_qmc_audio.c
@@ -372,8 +372,8 @@ static int qmc_dai_hw_rule_format_by_channels(struct qmc_dai *qmc_dai,
 	struct snd_mask *f_old = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
 	unsigned int channels = params_channels(params);
 	unsigned int slot_width;
+	snd_pcm_format_t format;
 	struct snd_mask f_new;
-	unsigned int i;
 
 	if (!channels || channels > nb_ts) {
 		dev_err(qmc_dai->dev, "channels %u not supported\n",
@@ -384,10 +384,10 @@ static int qmc_dai_hw_rule_format_by_channels(struct qmc_dai *qmc_dai,
 	slot_width = (nb_ts / channels) * 8;
 
 	snd_mask_none(&f_new);
-	for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
-		if (snd_mask_test(f_old, i)) {
-			if (snd_pcm_format_physical_width(i) <= slot_width)
-				snd_mask_set(&f_new, i);
+	pcm_for_each_format(format) {
+		if (snd_mask_test_format(f_old, format)) {
+			if (snd_pcm_format_physical_width(format) <= slot_width)
+				snd_mask_set_format(&f_new, format);
 		}
 	}
 
@@ -551,26 +551,26 @@ static const struct snd_soc_dai_ops qmc_dai_ops = {
 
 static u64 qmc_audio_formats(u8 nb_ts)
 {
-	u64 formats;
-	unsigned int chan_width;
 	unsigned int format_width;
-	int i;
+	unsigned int chan_width;
+	snd_pcm_format_t format;
+	u64 formats_mask;
 
 	if (!nb_ts)
 		return 0;
 
-	formats = 0;
+	formats_mask = 0;
 	chan_width = nb_ts * 8;
-	for (i = 0; i <= SNDRV_PCM_FORMAT_LAST; i++) {
+	pcm_for_each_format(format) {
 		/*
 		 * Support format other than little-endian (ie big-endian or
 		 * without endianness such as 8bit formats)
 		 */
-		if (snd_pcm_format_little_endian(i) == 1)
+		if (snd_pcm_format_little_endian(format) == 1)
 			continue;
 
 		/* Support physical width multiple of 8bit */
-		format_width = snd_pcm_format_physical_width(i);
+		format_width = snd_pcm_format_physical_width(format);
 		if (format_width == 0 || format_width % 8)
 			continue;
 
@@ -581,9 +581,9 @@ static u64 qmc_audio_formats(u8 nb_ts)
 		if (format_width > chan_width || chan_width % format_width)
 			continue;
 
-		formats |= (1ULL << i);
+		formats_mask |= pcm_format_to_bits(format);
 	}
-	return formats;
+	return formats_mask;
 }
 
 static int qmc_audio_dai_parse(struct qmc_audio *qmc_audio, struct device_node *np,
-- 
2.41.0