bci: some more code for testing

[pandora-kernel.git] / sound / pci / es1968.c

diff --git a/sound/pci/es1968.c b/sound/pci/es1968.c
index 7d911a1..1bf298d 100644 (file)
--- a/sound/pci/es1968.c
+++ b/sound/pci/es1968.c
@@ -1827,6 +1827,22 @@ snd_es1968_pcm(struct es1968 *chip, int device)
 
        return 0;
 }
+/*
+ * suppress jitter on some maestros when playing stereo
+ */
+static void snd_es1968_suppress_jitter(struct es1968 *chip, struct esschan *es)
+{
+       unsigned int cp1;
+       unsigned int cp2;
+       unsigned int diff;
+
+       cp1 = __apu_get_register(chip, 0, 5);
+       cp2 = __apu_get_register(chip, 1, 5);
+       diff = (cp1 > cp2 ? cp1 - cp2 : cp2 - cp1);
+
+       if (diff > 1)
+               __maestro_write(chip, IDR0_DATA_PORT, cp1);
+}
 
 /*
  * update pointer
@@ -1948,8 +1964,11 @@ static irqreturn_t snd_es1968_interrupt(int irq, void *dev_id)
                struct esschan *es;
                spin_lock(&chip->substream_lock);
                list_for_each_entry(es, &chip->substream_list, list) {
-                       if (es->running)
+                       if (es->running) {
                                snd_es1968_update_pcm(chip, es);
+                               if (es->fmt & ESS_FMT_STEREO)
+                                       snd_es1968_suppress_jitter(chip, es);
+                       }
                }
                spin_unlock(&chip->substream_lock);
                if (chip->in_measurement) {
@@ -1972,7 +1991,7 @@ snd_es1968_mixer(struct es1968 *chip)
 {
        struct snd_ac97_bus *pbus;
        struct snd_ac97_template ac97;
-       struct snd_ctl_elem_id id;
+       struct snd_ctl_elem_id elem_id;
        int err;
        static struct snd_ac97_bus_ops ops = {
                .write = snd_es1968_ac97_write,
@@ -1989,14 +2008,14 @@ snd_es1968_mixer(struct es1968 *chip)
                return err;
 
        /* attach master switch / volumes for h/w volume control */
-       memset(&id, 0, sizeof(id));
-       id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-       strcpy(id.name, "Master Playback Switch");
-       chip->master_switch = snd_ctl_find_id(chip->card, &id);
-       memset(&id, 0, sizeof(id));
-       id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
-       strcpy(id.name, "Master Playback Volume");
-       chip->master_volume = snd_ctl_find_id(chip->card, &id);
+       memset(&elem_id, 0, sizeof(elem_id));
+       elem_id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+       strcpy(elem_id.name, "Master Playback Switch");
+       chip->master_switch = snd_ctl_find_id(chip->card, &elem_id);
+       memset(&elem_id, 0, sizeof(elem_id));
+       elem_id.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
+       strcpy(elem_id.name, "Master Playback Volume");
+       chip->master_volume = snd_ctl_find_id(chip->card, &elem_id);
 
        return 0;
 }
@@ -2456,7 +2475,8 @@ static inline void snd_es1968_free_gameport(struct es1968 *chip) { }
 static int snd_es1968_free(struct es1968 *chip)
 {
        if (chip->io_port) {
-               synchronize_irq(chip->irq);
+               if (chip->irq >= 0)
+                       synchronize_irq(chip->irq);
                outw(1, chip->io_port + 0x04); /* clear WP interrupts */
                outw(0, chip->io_port + ESM_PORT_HOST_IRQ); /* disable IRQ */
        }