ALSA/ASoC: use snd_pcm_direction_name()

Merge series from Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>:

Many drivers are selecting strings "playback" / "capture" by own
handling, but we have snd_pcm_direction_name() function for it.
This patch use it.

One note is that snd_pcm_direction_name() will select
"Playback" and "Capture", instead of "playback" / "capture".
Almost all drivers are using it as dev_dbg() or dev_err()
so no problem. But some other drivers are using it as other
purpose. It might be issue (?). For example ASoC debugfs dir name
will be changed by this patch.

sound/soc/fsl/lpc3xxx-i2s.c

@@ -188,8 +188,7 @@ static int lpc3xxx_i2s_hw_params(struct snd_pcm_substream *substream,
 
 	__lpc3xxx_find_clkdiv(&clkx, &clky, i2s_info_p->freq, xfersize, i2s_info_p->clkrate);
 
-	dev_dbg(dev, "Stream                : %s\n",
-		substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
+	dev_dbg(dev, "Stream                : %s\n", snd_pcm_direction_name(substream->stream));
 	dev_dbg(dev, "Desired clock rate    : %d\n", i2s_info_p->freq);
 	dev_dbg(dev, "Base clock rate       : %d\n", i2s_info_p->clkrate);
 	dev_dbg(dev, "Transfer size (bytes) : %d\n", xfersize);

sound/soc/soc-dapm.c

@@ -2751,8 +2751,7 @@ static int dapm_update_dai_unlocked(struct snd_pcm_substream *substream,
 	if (!w)
 		return 0;
 
-	dev_dbg(dai->dev, "Update DAI routes for %s %s\n", dai->name,
-		dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
+	dev_dbg(dai->dev, "Update DAI routes for %s %s\n", dai->name, snd_pcm_direction_name(dir));
 
 	snd_soc_dapm_widget_for_each_sink_path(w, p) {
 		ret = dapm_update_dai_chan(p, p->sink, channels);

sound/soc/soc-pcm.c

@@ -222,7 +222,7 @@ static void dpcm_create_debugfs_state(struct snd_soc_dpcm *dpcm, int stream)
 	char *name;
 
 	name = kasprintf(GFP_KERNEL, "%s:%s", dpcm->be->dai_link->name,
-			 stream ? "capture" : "playback");
+			 snd_pcm_direction_name(stream));
 	if (name) {
 		dpcm->debugfs_state = debugfs_create_dir(
 			name, dpcm->fe->debugfs_dpcm_root);
@@ -1278,7 +1278,7 @@ static int dpcm_be_connect(struct snd_soc_pcm_runtime *fe,
 	snd_soc_dpcm_stream_unlock_irq(fe, stream);
 
 	dev_dbg(fe->dev, "connected new DPCM %s path %s %s %s\n",
-			stream ? "capture" : "playback",  fe->dai_link->name,
+			snd_pcm_direction_name(stream),  fe->dai_link->name,
 			stream ? "<-" : "->", be->dai_link->name);
 
 	dpcm_create_debugfs_state(dpcm, stream);
@@ -1306,7 +1306,7 @@ static void dpcm_be_reparent(struct snd_soc_pcm_runtime *fe,
 			continue;
 
 		dev_dbg(fe->dev, "reparent %s path %s %s %s\n",
-			stream ? "capture" : "playback",
+			snd_pcm_direction_name(stream),
 			dpcm->fe->dai_link->name,
 			stream ? "<-" : "->", dpcm->be->dai_link->name);
 
@@ -1327,14 +1327,14 @@ void dpcm_be_disconnect(struct snd_soc_pcm_runtime *fe, int stream)
 	snd_soc_dpcm_stream_lock_irq(fe, stream);
 	for_each_dpcm_be_safe(fe, stream, dpcm, d) {
 		dev_dbg(fe->dev, "ASoC: BE %s disconnect check for %s\n",
-				stream ? "capture" : "playback",
+				snd_pcm_direction_name(stream),
 				dpcm->be->dai_link->name);
 
 		if (dpcm->state != SND_SOC_DPCM_LINK_STATE_FREE)
 			continue;
 
 		dev_dbg(fe->dev, "freed DSP %s path %s %s %s\n",
-			stream ? "capture" : "playback", fe->dai_link->name,
+			snd_pcm_direction_name(stream), fe->dai_link->name,
 			stream ? "<-" : "->", dpcm->be->dai_link->name);
 
 		/* BEs still alive need new FE */
@@ -1441,10 +1441,10 @@ int dpcm_path_get(struct snd_soc_pcm_runtime *fe,
 
 	if (paths > 0)
 		dev_dbg(fe->dev, "ASoC: found %d audio %s paths\n", paths,
-			stream ? "capture" : "playback");
+			snd_pcm_direction_name(stream));
 	else if (paths == 0)
 		dev_dbg(fe->dev, "ASoC: %s no valid %s path\n", fe->dai_link->name,
-			 stream ? "capture" : "playback");
+			snd_pcm_direction_name(stream));
 
 	return paths;
 }
@@ -1487,7 +1487,7 @@ static int dpcm_prune_paths(struct snd_soc_pcm_runtime *fe, int stream,
 			continue;
 
 		dev_dbg(fe->dev, "ASoC: pruning %s BE %s for %s\n",
-			stream ? "capture" : "playback",
+			snd_pcm_direction_name(stream),
 			dpcm->be->dai_link->name, fe->dai_link->name);
 		dpcm->state = SND_SOC_DPCM_LINK_STATE_FREE;
 		dpcm_set_be_update_state(dpcm->be, stream, SND_SOC_DPCM_UPDATE_BE);
@@ -1605,7 +1605,7 @@ void dpcm_be_dai_stop(struct snd_soc_pcm_runtime *fe, int stream,
 
 		if (be->dpcm[stream].users == 0) {
 			dev_err(be->dev, "ASoC: no users %s at close - state %d\n",
-				stream ? "capture" : "playback",
+				snd_pcm_direction_name(stream),
 				be->dpcm[stream].state);
 			continue;
 		}
@@ -1645,7 +1645,7 @@ int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
 
 		if (!be_substream) {
 			dev_err(be->dev, "ASoC: no backend %s stream\n",
-				stream ? "capture" : "playback");
+				snd_pcm_direction_name(stream));
 			continue;
 		}
 
@@ -1656,7 +1656,7 @@ int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
 		/* first time the dpcm is open ? */
 		if (be->dpcm[stream].users == DPCM_MAX_BE_USERS) {
 			dev_err(be->dev, "ASoC: too many users %s at open %d\n",
-				stream ? "capture" : "playback",
+				snd_pcm_direction_name(stream),
 				be->dpcm[stream].state);
 			continue;
 		}
@@ -1669,7 +1669,7 @@ int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
 			continue;
 
 		dev_dbg(be->dev, "ASoC: open %s BE %s\n",
-			stream ? "capture" : "playback", be->dai_link->name);
+			snd_pcm_direction_name(stream), be->dai_link->name);
 
 		be_substream->runtime = fe_substream->runtime;
 		err = __soc_pcm_open(be, be_substream);
@@ -1677,7 +1677,7 @@ int dpcm_be_dai_startup(struct snd_soc_pcm_runtime *fe, int stream)
 			be->dpcm[stream].users--;
 			if (be->dpcm[stream].users < 0)
 				dev_err(be->dev, "ASoC: no users %s at unwind %d\n",
-					stream ? "capture" : "playback",
+					snd_pcm_direction_name(stream),
 					be->dpcm[stream].state);
 
 			be->dpcm[stream].state = SND_SOC_DPCM_STATE_CLOSE;
@@ -2531,7 +2531,7 @@ static int dpcm_run_update_shutdown(struct snd_soc_pcm_runtime *fe, int stream)
 	int err;
 
 	dev_dbg(fe->dev, "ASoC: runtime %s close on FE %s\n",
-			stream ? "capture" : "playback", fe->dai_link->name);
+		snd_pcm_direction_name(stream), fe->dai_link->name);
 
 	if (trigger == SND_SOC_DPCM_TRIGGER_BESPOKE) {
 		/* call bespoke trigger - FE takes care of all BE triggers */
@@ -2565,7 +2565,7 @@ static int dpcm_run_update_startup(struct snd_soc_pcm_runtime *fe, int stream)
 	int ret = 0;
 
 	dev_dbg(fe->dev, "ASoC: runtime %s open on FE %s\n",
-			stream ? "capture" : "playback", fe->dai_link->name);
+		snd_pcm_direction_name(stream), fe->dai_link->name);
 
 	/* Only start the BE if the FE is ready */
 	if (fe->dpcm[stream].state == SND_SOC_DPCM_STATE_HW_FREE ||

sound/soc/sof/intel/hda-stream.c

@@ -216,9 +216,7 @@ hda_dsp_stream_get(struct snd_sof_dev *sdev, int direction, u32 flags)
 
 	/* stream found ? */
 	if (!hext_stream) {
-		dev_err(sdev->dev, "error: no free %s streams\n",
-			direction == SNDRV_PCM_STREAM_PLAYBACK ?
-			"playback" : "capture");
+		dev_err(sdev->dev, "error: no free %s streams\n", snd_pcm_direction_name(direction));
 		return hext_stream;
 	}
 

sound/soc/sof/pcm.c

@@ -100,7 +100,7 @@ sof_pcm_setup_connected_widgets(struct snd_sof_dev *sdev, struct snd_soc_pcm_run
 							     dpcm_end_walk_at_be);
 		if (ret < 0) {
 			dev_err(sdev->dev, "error: dai %s has no valid %s path\n", dai->name,
-				dir == SNDRV_PCM_STREAM_PLAYBACK ? "playback" : "capture");
+				snd_pcm_direction_name(dir));
 			return ret;
 		}
 

sound/soc/stm/stm32_i2s.c

@@ -823,7 +823,7 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		/* Enable i2s */
 		dev_dbg(cpu_dai->dev, "start I2S %s\n",
-			playback_flg ? "playback" : "capture");
+			snd_pcm_direction_name(substream->stream));
 
 		cfg1_mask = I2S_CFG1_RXDMAEN | I2S_CFG1_TXDMAEN;
 		regmap_update_bits(i2s->regmap, STM32_I2S_CFG1_REG,
@@ -869,7 +869,7 @@ static int stm32_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
 	case SNDRV_PCM_TRIGGER_SUSPEND:
 	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 		dev_dbg(cpu_dai->dev, "stop I2S %s\n",
-			playback_flg ? "playback" : "capture");
+			snd_pcm_direction_name(substream->stream));
 
 		if (playback_flg)
 			regmap_update_bits(i2s->regmap, STM32_I2S_IER_REG,

sound/soc/tegra/tegra210_i2s.c

@@ -85,7 +85,7 @@ static int tegra210_i2s_set_clock_rate(struct device *dev,
 }
 
 static int tegra210_i2s_sw_reset(struct snd_soc_component *compnt,
-				 bool is_playback)
+				 int stream)
 {
 	struct device *dev = compnt->dev;
 	struct tegra210_i2s *i2s = dev_get_drvdata(dev);
@@ -95,7 +95,7 @@ static int tegra210_i2s_sw_reset(struct snd_soc_component *compnt,
 	unsigned int cif_ctrl, stream_ctrl, i2s_ctrl, val;
 	int err;
 
-	if (is_playback) {
+	if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
 		reset_reg = TEGRA210_I2S_RX_SOFT_RESET;
 		cif_reg = TEGRA210_I2S_RX_CIF_CTRL;
 		stream_reg = TEGRA210_I2S_RX_CTRL;
@@ -118,7 +118,7 @@ static int tegra210_i2s_sw_reset(struct snd_soc_component *compnt,
 				       10, 10000);
 	if (err) {
 		dev_err(dev, "timeout: failed to reset I2S for %s\n",
-			is_playback ? "playback" : "capture");
+			snd_pcm_direction_name(stream));
 		return err;
 	}
 
@@ -137,16 +137,16 @@ static int tegra210_i2s_init(struct snd_soc_dapm_widget *w,
 	struct device *dev = compnt->dev;
 	struct tegra210_i2s *i2s = dev_get_drvdata(dev);
 	unsigned int val, status_reg;
-	bool is_playback;
+	int stream;
 	int err;
 
 	switch (w->reg) {
 	case TEGRA210_I2S_RX_ENABLE:
-		is_playback = true;
+		stream = SNDRV_PCM_STREAM_PLAYBACK;
 		status_reg = TEGRA210_I2S_RX_STATUS;
 		break;
 	case TEGRA210_I2S_TX_ENABLE:
-		is_playback = false;
+		stream = SNDRV_PCM_STREAM_CAPTURE;
 		status_reg = TEGRA210_I2S_TX_STATUS;
 		break;
 	default:
@@ -159,11 +159,11 @@ static int tegra210_i2s_init(struct snd_soc_dapm_widget *w,
 				       10, 10000);
 	if (err) {
 		dev_err(dev, "timeout: previous I2S %s is still active\n",
-			is_playback ? "playback" : "capture");
+			snd_pcm_direction_name(stream));
 		return err;
 	}
 
-	return tegra210_i2s_sw_reset(compnt, is_playback);
+	return tegra210_i2s_sw_reset(compnt, stream);
 }
 
 static int __maybe_unused tegra210_i2s_runtime_suspend(struct device *dev)