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ALSA: hda - Check non-snoop in a single place 

Merge the checks for VIA and ATI-HDMI into a single place for better
code-flow management.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
hifive-unleashed-5.1
Takashi Iwai 2011-12-14 09:27:04 +01:00
parent 1815b34a62
commit a1585d7697
1 changed files with 30 additions and 12 deletions
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42
sound/pci/hda/hda_intel.c
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@ -1153,16 +1153,6 @@ static void update_pci_byte(struct pci_dev *pci, unsigned int reg,
static void azx_init_pci(struct azx *chip)
{
/* force to non-snoop mode for a new VIA controller when BIOS is set */
if (chip->snoop && chip->driver_type == AZX_DRIVER_VIA) {
u8 snoop;
pci_read_config_byte(chip->pci, 0x42, &snoop);
if (!(snoop & 0x80) && chip->pci->revision == 0x30) {
chip->snoop = 0;
snd_printdd(SFX "Force to non-snoop mode\n");
}
}
/* Clear bits 0-2 of PCI register TCSEL (at offset 0x44)
* TCSEL == Traffic Class Select Register, which sets PCI express QOS
* Ensuring these bits are 0 clears playback static on some HD Audio
@ -2634,6 +2624,35 @@ static void __devinit check_msi(struct azx *chip)
}
}
/* check the snoop mode availability */
static void __devinit azx_check_snoop_available(struct azx *chip)
{
bool snoop = chip->snoop;
switch (chip->driver_type) {
case AZX_DRIVER_VIA:
/* force to non-snoop mode for a new VIA controller
* when BIOS is set
*/
if (snoop) {
u8 val;
pci_read_config_byte(chip->pci, 0x42, &val);
if (!(val & 0x80) && chip->pci->revision == 0x30)
snoop = false;
}
break;
case AZX_DRIVER_ATIHDMI_NS:
/* new ATI HDMI requires non-snoop */
snoop = false;
break;
}
if (snoop != chip->snoop) {
snd_printk(KERN_INFO SFX "Force to %s mode\n",
snoop ? "snoop" : "non-snoop");
chip->snoop = snoop;
}
}
/*
* constructor
@ -2680,8 +2699,7 @@ static int __devinit azx_create(struct snd_card *card, struct pci_dev *pci,
chip->single_cmd = single_cmd;
chip->snoop = hda_snoop;
if (chip->driver_type == AZX_DRIVER_ATIHDMI_NS)
chip->snoop = 0;
azx_check_snoop_available(chip);
if (bdl_pos_adj[dev] < 0) {
switch (chip->driver_type) {