linux-kernel - [PATCH] ALSA: hda - New VIA controller suppor no-snoop path

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Date:   Mon, 16 Apr 2018 17:48:09 +0800
From:   David Wang <davidwang@...oxin.com>
To:     <perex@...ex.cz>, <tiwai@...e.com>, <vinod.koul@...el.com>,
        <Vijendar.Mukunda@....com>, <subhransu.s.prusty@...el.com>,
        <linux-kernel@...r.kernel.org>, <alsa-devel@...a-project.org>
CC:     <brucechang@...-alliance.com>, <cooperyan@...oxin.com>,
        <qiyuanwang@...oxin.com>, <benjaminpan@...tech.com>,
        <lukelin@...cpu.com>, <timguo@...oxin.com>,
        David Wang <davidwang@...oxin.com>
Subject: [PATCH] ALSA: hda - New VIA controller suppor no-snoop path

This patch is used to tell kernel that new VIA HDAC controller also
support no-snoop path.

Signed-off-by: David Wang <davidwang@...oxin.com>
---
 sound/pci/hda/hda_intel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/pci/hda/hda_intel.c b/sound/pci/hda/hda_intel.c
index 96143df..439e8e9 100644
--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -1640,7 +1640,7 @@ static void azx_check_snoop_available(struct azx *chip)
 		 */
 		u8 val;
 		pci_read_config_byte(chip->pci, 0x42, &val);
-		if (!(val & 0x80) && chip->pci->revision == 0x30)
+		if (!(val & 0x80) && (chip->pci->revision == 0x30 || chip->pci->revision == 0x20))
 			snoop = false;
 	}
 
-- 
1.9.1