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author | Takashi Iwai <tiwai@suse.de> | 2018-02-20 17:33:45 +0100 |
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committer | Takashi Iwai <tiwai@suse.de> | 2018-02-22 11:51:36 +0100 |
commit | 7229b12f5da33d5c376ee264f063703844b8092d (patch) | |
tree | b00055f5c15546419747de25152f707ee232a187 /block | |
parent | fdcc968a3b290407bcba9d4c90e2fba6d8d928f1 (diff) | |
download | linux-7229b12f5da33d5c376ee264f063703844b8092d.tar.bz2 |
ALSA: x86: hdmi: Add single_port option for compatible behavior
The recent support for the multiple PCM devices allowed user to use
multiple HDMI/DP outputs, but at the same time, the PCM stream
assignment has been changed, too. Due to that, the former PCM#0
(there was only one stream in the past) is likely assigned to a
different one (e.g. PCM#2), and it ends up with the regression when
user sticks with the fixed configuration using the device#0.
Although the multiple monitor support shouldn't matter when user
deploys the backend like PulseAudio that checks the jack detection
state, the behavior change isn't always acceptable for some users.
As a mitigation, this patch introduces an option to switch the
behavior back to the old-good-days: when the new option,
single_port=1, is passed, the driver creates only a single PCM device,
and it's assigned to the first connected one, like the earlier
versions did. The option is turned off as default still to support
the multiple monitors.
Fixes: 8a2d6ae1f737 ("ALSA: x86: Register multiple PCM devices for the LPE audio card")
Reported-and-tested-by: Hubert Mantel <mantel@metadox.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions