linux-kernel - [PATCH 4.9 032/159] ALSA: hda: Fix position reporting on Poulsbo

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Message-Id: <20221024112950.578096067@linuxfoundation.org>
Date:   Mon, 24 Oct 2022 13:29:46 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Takashi Iwai <tiwai@...e.de>,
        Hans de Goede <hdegoede@...hat.com>
Subject: [PATCH 4.9 032/159] ALSA: hda: Fix position reporting on Poulsbo

From: Takashi Iwai <tiwai@...e.de>

commit 56e696c0f0c71b77fff921fc94b58a02f0445b2c upstream.

Hans reported that his Sony VAIO VPX11S1E showed the broken sound
behavior at the start of the stream for a couple of seconds, and it
turned out that the position_fix=1 option fixes the issue.  It implies
that the position reporting is inaccurate, and very likely hitting on
all Poulsbo devices.

The patch applies the workaround for Poulsbo generically to switch to
LPIB mode instead of the default position buffer.

Reported-and-tested-by: Hans de Goede <hdegoede@...hat.com>
Cc: <stable@...r.kernel.org>
Link: https://lore.kernel.org/r/3e8697e1-87c6-7a7b-d2e8-b21f1d2f181b@redhat.com
Link: https://lore.kernel.org/r/20221001142124.7241-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@...e.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/pci/hda/hda_intel.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/sound/pci/hda/hda_intel.c
+++ b/sound/pci/hda/hda_intel.c
@@ -2320,7 +2320,8 @@ static const struct pci_device_id azx_id
 	  .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_PCH_NOPM },
 	/* Poulsbo */
 	{ PCI_DEVICE(0x8086, 0x811b),
-	  .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_PCH_BASE },
+	  .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_PCH_BASE |
+	  AZX_DCAPS_POSFIX_LPIB },
 	/* Oaktrail */
 	{ PCI_DEVICE(0x8086, 0x080a),
 	  .driver_data = AZX_DRIVER_SCH | AZX_DCAPS_INTEL_PCH_BASE },