ALSA: hda/hdmi: fix silent stream for first playback to DP

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[ Upstream commit b1a5039759 ]

A problem exists in enabling silent stream when connection type is
DisplayPort. Silent stream programming is completed when a new DP
receiver is connected, but infoframe transmission does not actually
start until PCM is opened for the first time. This can result in audible
gap of multiple seconds. This only affects the first PCM open.

Fix the issue by properly assigning a converter to the silent stream,
and modifying the required stream ID programming sequence.

This change only affects Intel display audio codecs.

BugLink: https://github.com/thesofproject/linux/issues/2468
Fixes: 951894cf30 ("ALSA: hda/hdmi: Add Intel silent stream support")
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20201210174445.3134104-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Kai Vehmanen 2020-12-10 19:44:45 +02:00 • committed by Greg Kroah-Hartman

parent 0bc1c2d4a7

commit db71bc7ef3

1 changed files with 86 additions and 12 deletions

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sound/pci/hda/patch_hdmi.c

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