On Fri, 29 Nov 2019 15:37:56 +0100, Kai Vehmanen wrote:
Commit 5398e94fb753 ("ALSA: hda - Add DP-MST support for NVIDIA codecs") introduced a slight change of behaviour how non-MST monitors are assigned to PCMs on Intel platforms.
In the drm_audio_component.h interface, the third parameter to pin_eld_notify() is pipe number. On Intel platforms, this value is -1 for MST. On other platforms, a non-zero pipe id is used to signal MST use.
This difference leads to some subtle differences in hdmi_find_pcm_slot() with regards to how non-MST monitors are assigned to PCMs. This patch restores the original behaviour on Intel platforms while keeping the new allocation policy on other platforms.
Signed-off-by: Kai Vehmanen kai.vehmanen@linux.intel.com
I believe this is the right fix. I thought of a similar possibility, but didn't take it seriously whether it really matters.
So applied it now for the next 5.5-rc1 pull request.
thanks,
Takashi