From 643a2cc99b53c13d90c02dc344f780ba9a89e012 Mon Sep 17 00:00:00 2001 From: Takashi Iwai Date: Tue, 3 Dec 2019 16:41:05 +0100 Subject: ALSA: hda: hdmi - Keep old slot assignment behavior for Intel platforms The commit 609f5485344b ("ALSA: hda: hdmi - preserve non-MST PCM routing for Intel platforms") tried to restore the old behavior wrt assignment of the PCM slot for Intel platforms, but this didn't do it right. As found in the later discussion, a positive pipe id on Intel platforms can be passed for single monitor attachment case. This patch reverts the previous attempt and applies a simpler workaround instead. Actually, for Intel platforms, we can handle as if per_pin->dev_id=0, assign the primary slot at the first try. This assures the compatible behavior with the previous versions regarding the slot assignment. Fixes: 609f5485344b ("ALSA: hda: hdmi - preserve non-MST PCM routing for Intel platforms") Link: https://lore.kernel.org/r/20191203154105.30414-1-tiwai@suse.de Signed-off-by: Takashi Iwai --- sound/pci/hda/patch_hdmi.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) (limited to 'sound') diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index ed4e98a1057a..78647ee02339 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -1348,21 +1348,18 @@ static int hdmi_find_pcm_slot(struct hdmi_spec *spec, * with the legacy static per_pin-pcm assignment that existed in the * days before DP-MST. * + * Intel DP-MST prefers this legacy behavior for compatibility, too. + * * per_pin of m!=0 prefers to get pcm=(num_nids + (m - 1)). */ - if (per_pin->dev_id == 0) { + if (per_pin->dev_id == 0 || spec->intel_hsw_fixup) { if (!test_bit(per_pin->pin_nid_idx, &spec->pcm_bitmap)) return per_pin->pin_nid_idx; } else { 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 */ -- cgit v1.2.3