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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