[ALSA] intel8x0 - Add buggy_semaphore option
Documentation,Intel8x0 driver
Added buggy_semaphore module option to snd-intel8x0 driver
for a workaround for hardwards with buggy codec semaphores.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/intel8x0.c b/sound/pci/intel8x0.c
index b96f87e..47965df 100644
--- a/sound/pci/intel8x0.c
+++ b/sound/pci/intel8x0.c
@@ -69,6 +69,7 @@
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP; /* Enable this card */
static int ac97_clock[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 0};
static char *ac97_quirk[SNDRV_CARDS];
+static int buggy_semaphore[SNDRV_CARDS];
static int buggy_irq[SNDRV_CARDS];
static int xbox[SNDRV_CARDS];
@@ -86,6 +87,8 @@
MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (0 = auto-detect).");
module_param_array(ac97_quirk, charp, NULL, 0444);
MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
+module_param_array(buggy_semaphore, bool, NULL, 0444);
+MODULE_PARM_DESC(buggy_semaphore, "Enable workaround for hardwares with problematic codec semaphores.");
module_param_array(buggy_irq, bool, NULL, 0444);
MODULE_PARM_DESC(buggy_irq, "Enable workaround for buggy interrupts on some motherboards.");
module_param_array(xbox, bool, NULL, 0444);
@@ -367,6 +370,7 @@
unsigned fix_nocache: 1; /* workaround for 440MX */
unsigned buggy_irq: 1; /* workaround for buggy mobos */
unsigned xbox: 1; /* workaround for Xbox AC'97 detection */
+ unsigned buggy_semaphore: 1; /* workaround for buggy codec semaphore */
int spdif_idx; /* SPDIF BAR index; *_SPBAR or -1 if use PCMOUT */
unsigned int sdm_saved; /* SDM reg value */
@@ -521,6 +525,9 @@
if ((igetdword(chip, ICHREG(GLOB_STA)) & codec) == 0)
return -EIO;
+ if (chip->buggy_semaphore)
+ return 0; /* just ignore ... */
+
/* Anyone holding a semaphore for 1 msec should be shot... */
time = 100;
do {
@@ -2549,6 +2556,7 @@
static int __devinit snd_intel8x0_create(snd_card_t * card,
struct pci_dev *pci,
unsigned long device_type,
+ int buggy_sem,
intel8x0_t ** r_intel8x0)
{
intel8x0_t *chip;
@@ -2606,6 +2614,7 @@
chip->card = card;
chip->pci = pci;
chip->irq = -1;
+ chip->buggy_semaphore = buggy_sem;
if (pci->vendor == PCI_VENDOR_ID_INTEL &&
pci->device == PCI_DEVICE_ID_INTEL_440MX)
@@ -2810,7 +2819,8 @@
}
}
- if ((err = snd_intel8x0_create(card, pci, pci_id->driver_data, &chip)) < 0) {
+ if ((err = snd_intel8x0_create(card, pci, pci_id->driver_data,
+ buggy_semaphore[dev], &chip)) < 0) {
snd_card_free(card);
return err;
}