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ALSA: hda - Suppress CORBRP clear on Nvidia controller chips 

The recent commit (ca460f8652) changed the CORB RP reset procedure to
follow the specification with a couple of sanity checks.
Unfortunately, Nvidia controller chips seem not following this way,
and spew the warning messages like:
  snd_hda_intel 0000:00:10.1: CORB reset timeout#1, CORBRP = 0

This patch adds the workaround for such chips.  It just skips the new
reset procedure for the known broken chips.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2014-04-29 18:38:21 +02:00
parent e32dfbed8c
commit 6ba736dd02
3 changed files with 21 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
sound/pci/hda/hda_controller.c
View File

@ -1059,24 +1059,26 @@ static void azx_init_cmd_io(struct azx *chip)
/* reset the corb hw read pointer */
azx_writew(chip, CORBRP, ICH6_CORBRP_RST);
for (timeout = 1000; timeout > 0; timeout--) {
if ((azx_readw(chip, CORBRP) & ICH6_CORBRP_RST) == ICH6_CORBRP_RST)
break;
udelay(1);
}
if (timeout <= 0)
dev_err(chip->card->dev, "CORB reset timeout#1, CORBRP = %d\n",
azx_readw(chip, CORBRP));
if (!(chip->driver_caps & AZX_DCAPS_CORBRP_SELF_CLEAR)) {
for (timeout = 1000; timeout > 0; timeout--) {
if ((azx_readw(chip, CORBRP) & ICH6_CORBRP_RST) == ICH6_CORBRP_RST)
break;
udelay(1);
}
if (timeout <= 0)
dev_err(chip->card->dev, "CORB reset timeout#1, CORBRP = %d\n",
azx_readw(chip, CORBRP));
azx_writew(chip, CORBRP, 0);
for (timeout = 1000; timeout > 0; timeout--) {
if (azx_readw(chip, CORBRP) == 0)
break;
udelay(1);
azx_writew(chip, CORBRP, 0);
for (timeout = 1000; timeout > 0; timeout--) {
if (azx_readw(chip, CORBRP) == 0)
break;
udelay(1);
}
if (timeout <= 0)
dev_err(chip->card->dev, "CORB reset timeout#2, CORBRP = %d\n",
azx_readw(chip, CORBRP));
}
if (timeout <= 0)
dev_err(chip->card->dev, "CORB reset timeout#2, CORBRP = %d\n",
azx_readw(chip, CORBRP));
/* enable corb dma */
azx_writeb(chip, CORBCTL, ICH6_CORBCTL_RUN);

3
sound/pci/hda/hda_intel.c
View File

@ -249,7 +249,8 @@ enum {
/* quirks for Nvidia */
#define AZX_DCAPS_PRESET_NVIDIA \
(AZX_DCAPS_NVIDIA_SNOOP | AZX_DCAPS_RIRB_DELAY | AZX_DCAPS_NO_MSI |\
AZX_DCAPS_ALIGN_BUFSIZE | AZX_DCAPS_NO_64BIT)
AZX_DCAPS_ALIGN_BUFSIZE | AZX_DCAPS_NO_64BIT |\
AZX_DCAPS_CORBRP_SELF_CLEAR)
#define AZX_DCAPS_PRESET_CTHDA \
(AZX_DCAPS_NO_MSI | AZX_DCAPS_POSFIX_LPIB | AZX_DCAPS_4K_BDLE_BOUNDARY)

1
sound/pci/hda/hda_priv.h
View File

@ -189,6 +189,7 @@ enum { SDI0, SDI1, SDI2, SDI3, SDO0, SDO1, SDO2, SDO3 };
#define AZX_DCAPS_COUNT_LPIB_DELAY (1 << 25) /* Take LPIB as delay */
#define AZX_DCAPS_PM_RUNTIME (1 << 26) /* runtime PM support */
#define AZX_DCAPS_I915_POWERWELL (1 << 27) /* HSW i915 powerwell support */
#define AZX_DCAPS_CORBRP_SELF_CLEAR (1 << 28) /* CORBRP clears itself after reset */
/* position fix mode */
enum {