ALSA: lola - Allow granularity changes

Add some sanity checks.
Change PCM parameters appropriately per granularity.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/pci/lola/lola.c

@@ -587,14 +587,31 @@ static int __devinit lola_create(struct snd_card *card, struct pci_dev *pci,
 	chip->pci = pci;
 	chip->irq = -1;
 
-	chip->sample_rate_min = sample_rate_min[dev];
 	chip->granularity = granularity[dev];
-	/* FIXME */
-	if (chip->granularity != LOLA_GRANULARITY_MAX) {
+	switch (chip->granularity) {
+	case 8:
+		chip->sample_rate_max = 48000;
+		break;
+	case 16:
+		chip->sample_rate_max = 96000;
+		break;
+	case 32:
+		chip->sample_rate_max = 192000;
+		break;
+	default:
 		snd_printk(KERN_WARNING SFX
-			   "Only %d granularity is supported for now\n",
-			   LOLA_GRANULARITY_MAX);
+			   "Invalid granularity %d, reset to %d\n",
+			   chip->granularity, LOLA_GRANULARITY_MAX);
 		chip->granularity = LOLA_GRANULARITY_MAX;
+		chip->sample_rate_max = 192000;
+		break;
+	}
+	chip->sample_rate_min = sample_rate_min[dev];
+	if (chip->sample_rate_min > chip->sample_rate_max) {
+		snd_printk(KERN_WARNING SFX
+			   "Invalid sample_rate_min %d, reset to 16000\n",
+			   chip->sample_rate_min);
+		chip->sample_rate_min = 16000;
 	}
 
 	err = pci_request_regions(pci, DRVNAME);

sound/pci/lola/lola.h

@@ -367,6 +367,7 @@ struct lola {
 	/* parameters */
 	unsigned int granularity;
 	unsigned int sample_rate_min;
+	unsigned int sample_rate_max;
 
 	/* flags */
 	unsigned int running :1;

sound/pci/lola/lola_pcm.c

@@ -178,14 +178,16 @@ static int lola_pcm_open(struct snd_pcm_substream *substream)
 	str->opened = 1;
 	runtime->hw = lola_pcm_hw;
 	runtime->hw.channels_max = pcm->num_streams - str->index;
+	runtime->hw.rate_min = chip->sample_rate_min;
+	runtime->hw.rate_max = chip->sample_rate_max;
 	snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 	/* period size = multiple of chip->granularity (8, 16 or 32 frames)
 	 * use LOLA_GRANULARITY_MAX = 32 for instance
 	 */
 	snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
-				   LOLA_GRANULARITY_MAX);
+				   chip->granularity);
 	snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
-				   LOLA_GRANULARITY_MAX);
+				   chip->granularity);
 	mutex_unlock(&chip->open_mutex);
 	return 0;
 }