staging: bcm2835-audio: Simplify PCM creation helpers

All three functions to create PCM objects are fairly resemble, and can
be unified to a single common helper.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Tested-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/bcm2835-audio/bcm2835-pcm.c

@@ -324,91 +324,36 @@ static const struct snd_pcm_ops snd_bcm2835_playback_spdif_ops = {
 };
 
 /* create a pcm device */
-int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, u32 numchannels)
+int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, const char *name,
+			int idx, enum snd_bcm2835_route route,
+			u32 numchannels, bool spdif)
 {
 	struct snd_pcm *pcm;
 	int err;
 
-	err = snd_pcm_new(chip->card, "bcm2835 ALSA", 0, numchannels, 0, &pcm);
-	if (err < 0)
-		return err;
-	pcm->private_data = chip;
-	pcm->nonatomic = true;
-	strcpy(pcm->name, "bcm2835 ALSA");
-	chip->pcm = pcm;
-	chip->dest = AUDIO_DEST_AUTO;
-	chip->volume = 0;
-	chip->mute = CTRL_VOL_UNMUTE; /*disable mute on startup */
-	/* set operators */
-	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
-			&snd_bcm2835_playback_ops);
-
-	/* pre-allocation of buffers */
-	/* NOTE: this may fail */
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
-					      chip->card->dev->parent,
-					      snd_bcm2835_playback_hw.buffer_bytes_max,
-					      snd_bcm2835_playback_hw.buffer_bytes_max);
-
-	return 0;
-}
-
-int snd_bcm2835_new_spdif_pcm(struct bcm2835_chip *chip)
-{
-	struct snd_pcm *pcm;
-	int err;
-
-	err = snd_pcm_new(chip->card, "bcm2835 ALSA", 1, 1, 0, &pcm);
-	if (err < 0)
-		return err;
-
-	pcm->private_data = chip;
-	pcm->nonatomic = true;
-	strcpy(pcm->name, "bcm2835 IEC958/HDMI");
-	chip->pcm_spdif = pcm;
-	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
-			&snd_bcm2835_playback_spdif_ops);
-
-	/* pre-allocation of buffers */
-	/* NOTE: this may fail */
-	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
-		chip->card->dev->parent,
-		snd_bcm2835_playback_spdif_hw.buffer_bytes_max, snd_bcm2835_playback_spdif_hw.buffer_bytes_max);
-
-	return 0;
-}
-
-int snd_bcm2835_new_simple_pcm(struct bcm2835_chip *chip,
-			       const char *name,
-			       enum snd_bcm2835_route route,
-			       u32 numchannels)
-{
-	struct snd_pcm *pcm;
-	int err;
-
-	err = snd_pcm_new(chip->card, name, 0, numchannels,
-			  0, &pcm);
+	err = snd_pcm_new(chip->card, name, idx, numchannels, 0, &pcm);
 	if (err)
 		return err;
 
 	pcm->private_data = chip;
 	pcm->nonatomic = true;
 	strcpy(pcm->name, name);
-	chip->pcm = pcm;
-	chip->dest = route;
-	chip->volume = 0;
-	chip->mute = CTRL_VOL_UNMUTE;
+	if (!spdif) {
+		chip->dest = route;
+		chip->volume = 0;
+		chip->mute = CTRL_VOL_UNMUTE;
+	}
 
 	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
+			spdif ? &snd_bcm2835_playback_spdif_ops :
 			&snd_bcm2835_playback_ops);
 
-	snd_pcm_lib_preallocate_pages_for_all(
-		pcm,
-		SNDRV_DMA_TYPE_DEV,
-		chip->card->dev->parent,
-		snd_bcm2835_playback_hw.buffer_bytes_max,
-		snd_bcm2835_playback_hw.buffer_bytes_max);
+	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
+		chip->card->dev->parent, 128 * 1024, 128 * 1024);
 
+	if (spdif)
+		chip->pcm_spdif = pcm;
+	else
+		chip->pcm = pcm;
 	return 0;
 }
-

drivers/staging/vc04_services/bcm2835-audio/bcm2835.c

@@ -138,17 +138,26 @@ static int bcm2835_audio_alsa_newpcm(struct bcm2835_chip *chip,
 {
 	int err;
 
-	err = snd_bcm2835_new_pcm(chip, numchannels - 1);
+	err = snd_bcm2835_new_pcm(chip, "bcm2835 ALSA", 0, AUDIO_DEST_AUTO,
+				  numchannels - 1, false);
 	if (err)
 		return err;
 
-	err = snd_bcm2835_new_spdif_pcm(chip);
+	err = snd_bcm2835_new_pcm(chip, "bcm2835 IEC958/HDMI", 1, 0, 1, true);
 	if (err)
 		return err;
 
 	return 0;
 }
 
+static int bcm2835_audio_simple_newpcm(struct bcm2835_chip *chip,
+				       const char *name,
+				       enum snd_bcm2835_route route,
+				       u32 numchannels)
+{
+	return snd_bcm2835_new_pcm(chip, name, 0, route, numchannels, false);
+}
+
 static struct bcm2835_audio_driver bcm2835_audio_alsa = {
 	.driver = {
 		.name = "bcm2835_alsa",
@@ -169,7 +178,7 @@ static struct bcm2835_audio_driver bcm2835_audio_hdmi = {
 	.shortname = "bcm2835 HDMI",
 	.longname  = "bcm2835 HDMI",
 	.minchannels = 1,
-	.newpcm = snd_bcm2835_new_simple_pcm,
+	.newpcm = bcm2835_audio_simple_newpcm,
 	.newctl = snd_bcm2835_new_hdmi_ctl,
 	.route = AUDIO_DEST_HDMI
 };
@@ -182,7 +191,7 @@ static struct bcm2835_audio_driver bcm2835_audio_headphones = {
 	.shortname = "bcm2835 Headphones",
 	.longname  = "bcm2835 Headphones",
 	.minchannels = 1,
-	.newpcm = snd_bcm2835_new_simple_pcm,
+	.newpcm = bcm2835_audio_simple_newpcm,
 	.newctl = snd_bcm2835_new_headphones_ctl,
 	.route = AUDIO_DEST_HEADPHONES
 };

drivers/staging/vc04_services/bcm2835-audio/bcm2835.h

@@ -84,12 +84,9 @@ struct bcm2835_alsa_stream {
 };
 
 int snd_bcm2835_new_ctl(struct bcm2835_chip *chip);
-int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, u32 numchannels);
-int snd_bcm2835_new_spdif_pcm(struct bcm2835_chip *chip);
-int snd_bcm2835_new_simple_pcm(struct bcm2835_chip *chip,
-			       const char *name,
-			       enum snd_bcm2835_route route,
-			       u32 numchannels);
+int snd_bcm2835_new_pcm(struct bcm2835_chip *chip, const char *name,
+			int idx, enum snd_bcm2835_route route,
+			u32 numchannels, bool spdif);
 
 int snd_bcm2835_new_hdmi_ctl(struct bcm2835_chip *chip);
 int snd_bcm2835_new_headphones_ctl(struct bcm2835_chip *chip);