[1/2]ALSA: hda: add Zhaoxin HDAC non-snoop support

[Takashi Iwai]

On Wed, 14 Apr 2021 14:00:19 +0200,
Hans Hu(SH-RD) wrote:
> 
> Hi Takashi,
> 
> Recently, our(AZX_DRIVER_ZHAOXIN) HDAC controller has added the feature of non-snoop mode, we have written a draft patch for it and hope to be accepted.

The code change looks good.  Please go ahead with the proper
submission.


thanks,

Takashi

> 
> diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c index b59b0f3..420b728 100644
> --- a/sound/pci/hda/hda_intel.c
> +++ b/sound/pci/hda/hda_intel.c
> @@ -1702,6 +1702,14 @@ static void azx_check_snoop_available(struct azx *chip)
>  snoop = false;
>  }
> 
> +if (azx_get_snoop_type(chip) == AZX_SNOOP_TYPE_NONE &&
> +    chip->driver_type == AZX_DRIVER_ZHAOXIN) {
> +u8 val;
> +pci_read_config_byte(chip->pci, 0x42, &val);
> +if (!(val & 0x80))
> +snoop = false;
> +}
> +
>  if (chip->driver_caps & AZX_DCAPS_SNOOP_OFF)
>  snoop = false;
> 
> 
> Thanks,
> 　Hans Hu :)
> 
> 
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