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| author | Kai Vehmanen <kai.vehmanen@linux.intel.com> | 2019-11-29 16:37:56 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-11-29 15:42:16 +0100 |
| commit | 609f5485344b05a7eaffe9fdd09d42ad1c501cdf (patch) | |
| tree | 1fcb873bd4263e58fffa9ec6c18ffd8198b2fdcf /sound | |
| parent | 0c0fe9e6b95ce2e9e2c83bef5563cf223e849eda (diff) | |
| download | linux-609f5485344b05a7eaffe9fdd09d42ad1c501cdf.tar.bz2 | |
ALSA: hda: hdmi - preserve non-MST PCM routing for Intel platforms
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>
Link: https://lore.kernel.org/r/20191129143756.23941-2-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/pci/hda/patch_hdmi.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index a50736269584..0032bba8cc9d 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1353,6 +1353,11 @@ static int hdmi_find_pcm_slot(struct hdmi_spec *spec, i = spec->num_nids + (per_pin->dev_id - 1); if (i < spec->pcm_used && !(test_bit(i, &spec->pcm_bitmap))) return i; + + /* keep legacy assignment for dev_id>0 on Intel platforms */ + if (spec->intel_hsw_fixup) + if (!test_bit(per_pin->pin_nid_idx, &spec->pcm_bitmap)) + return per_pin->pin_nid_idx; } /* have a second try; check the area over num_nids */ |