From 14d34f166c57e77e3d7f9bc8b43d349186d922c1 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Thu, 21 Oct 2010 09:03:25 +0200
Subject: [PATCH] ALSA: hda - Add some workarounds for Creative IBG
Creative HD-audio controller chips require some workarounds:
- Additional delay before RIRB response
- Set the initial RIRB counter to 0xc0
The latter seems to be done in general in Windows driver, so we may
use this value later for all types if it's confirmed to work better.
Reported-by: Wai Yew CHAY <wychay@ctl.creative.com>
Cc: <stable@kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/pci/hda/hda_intel.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 5cbea85a6453..ee445bc6e810 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -458,6 +458,7 @@ enum {
AZX_DRIVER_ULI,
AZX_DRIVER_NVIDIA,
AZX_DRIVER_TERA,
+ AZX_DRIVER_CTX,
AZX_DRIVER_GENERIC,
AZX_NUM_DRIVERS, /* keep this as last entry */
};
@@ -473,6 +474,7 @@ static char *driver_short_names[] __devinitdata = {
[AZX_DRIVER_ULI] = "HDA ULI M5461",
[AZX_DRIVER_NVIDIA] = "HDA NVidia",
[AZX_DRIVER_TERA] = "HDA Teradici",
+ [AZX_DRIVER_CTX] = "HDA Creative",
[AZX_DRIVER_GENERIC] = "HD-Audio Generic",
};
@@ -563,7 +565,10 @@ static void azx_init_cmd_io(struct azx *chip)
/* reset the rirb hw write pointer */
azx_writew(chip, RIRBWP, ICH6_RIRBWP_RST);
/* set N=1, get RIRB response interrupt for new entry */
- azx_writew(chip, RINTCNT, 1);
+ if (chip->driver_type == AZX_DRIVER_CTX)
+ azx_writew(chip, RINTCNT, 0xc0);
+ else
+ azx_writew(chip, RINTCNT, 1);
/* enable rirb dma and response irq */
azx_writeb(chip, RIRBCTL, ICH6_RBCTL_DMA_EN | ICH6_RBCTL_IRQ_EN);
spin_unlock_irq(&chip->reg_lock);
@@ -1136,8 +1141,11 @@ static irqreturn_t azx_interrupt(int irq, void *dev_id)
/* clear rirb int */
status = azx_readb(chip, RIRBSTS);
if (status & RIRB_INT_MASK) {
- if (status & RIRB_INT_RESPONSE)
+ if (status & RIRB_INT_RESPONSE) {
+ if (chip->driver_type == AZX_DRIVER_CTX)
+ udelay(80);
azx_update_rirb(chip);
+ }
azx_writeb(chip, RIRBSTS, RIRB_INT_MASK);
}
@@ -2784,10 +2792,10 @@ static DEFINE_PCI_DEVICE_TABLE(azx_ids) = {
{ PCI_DEVICE(PCI_VENDOR_ID_CREATIVE, PCI_ANY_ID),
.class = PCI_CLASS_MULTIMEDIA_HD_AUDIO << 8,
.class_mask = 0xffffff,
- .driver_data = AZX_DRIVER_GENERIC },
+ .driver_data = AZX_DRIVER_CTX },
#else
/* this entry seems still valid -- i.e. without emu20kx chip */
- { PCI_DEVICE(0x1102, 0x0009), .driver_data = AZX_DRIVER_GENERIC },
+ { PCI_DEVICE(0x1102, 0x0009), .driver_data = AZX_DRIVER_CTX },
#endif
/* Vortex86MX */
{ PCI_DEVICE(0x17f3, 0x3010), .driver_data = AZX_DRIVER_GENERIC },