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[SRU,B/OEM-B,5/9] ALSA: hda: hdmi - fix regression in connect list handling

Message ID 20200317021916.7256-6-hui.wang@canonical.com
State Accepted
Headers show
Series alsa/hdmi: support nvidia mst hdmi/dp audio (b/oem-b) | expand

Commit Message

Hui Wang March 17, 2020, 2:19 a.m. UTC 
From: Kai Vehmanen <kai.vehmanen@linux.intel.com>

BugLink: https://bugs.launchpad.net/bugs/1867704

Fix regression in how intel_haswell_fixup_connect_list()
results are used in hda_read_pin_conn(). Use of
snd_hda_get_raw_connections() in hda_read_pin_conn() bypasses
the cache and thus also bypasses the overridden pin connection
list. On platforms that require the connection list fixup,
mux list will be empty and HDMI playback will fail to -EBUSY
at open.

Fix the regression in hda_read_pinn_conn(). Simplify code
as suggested by Takashi Iwai to remove old
intel_haswell_fixup_connect_list() and copy the cvt_nid list
directly and not use snd_hda_override_conn_list() at all.

Fixes: 9c32fea83692 ("ALSA: hda - Add DP-MST support for non-acomp codecs")
BugLink: https://github.com/thesofproject/linux/issues/1537
Cc: Nikhil Mahale <nmahale@nvidia.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20191127161240.17026-1-kai.vehmanen@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
(backported from commit ae254888f3c39f66d09920b459112ba3eadf1dc4)
Signed-off-by: Hui Wang <hui.wang@canonical.com>
---
 sound/pci/hda/patch_hdmi.c | 39 +++++++++++++-------------------------
 1 file changed, 13 insertions(+), 26 deletions(-)
diff mbox series

Patch

diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c
index 03f19ba1d0c4..5cb563376be8 100644
--- a/sound/pci/hda/patch_hdmi.c
+++ b/sound/pci/hda/patch_hdmi.c
@@ -1324,6 +1324,7 @@  static int hdmi_read_pin_conn(struct hda_codec *codec, int pin_idx)
 	struct hdmi_spec_per_pin *per_pin = get_pin(spec, pin_idx);
 	hda_nid_t pin_nid = per_pin->pin_nid;
 	int dev_id = per_pin->dev_id;
+	int conns;
 
 	if (!(get_wcaps(codec, pin_nid) & AC_WCAP_CONN_LIST)) {
 		codec_warn(codec,
@@ -1334,10 +1335,18 @@  static int hdmi_read_pin_conn(struct hda_codec *codec, int pin_idx)
 
 	snd_hda_set_dev_select(codec, pin_nid, dev_id);
 
+	if (is_haswell_plus(codec)) {
+		conns = spec->num_cvts;
+		memcpy(per_pin->mux_nids, spec->cvt_nids,
+		       sizeof(hda_nid_t) * conns);
+	} else {
+		conns = snd_hda_get_raw_connections(codec, pin_nid,
+						    per_pin->mux_nids,
+						    HDA_MAX_CONNECTIONS);
+	}
+
 	/* all the device entries on the same pin have the same conn list */
-	per_pin->num_mux_nids =
-		snd_hda_get_raw_connections(codec, pin_nid, per_pin->mux_nids,
-					    HDA_MAX_CONNECTIONS);
+	per_pin->num_mux_nids = conns;
 
 	return 0;
 }
@@ -1735,9 +1744,6 @@  static void hdmi_repoll_eld(struct work_struct *work)
 	mutex_unlock(&spec->pcm_lock);
 }
 
-static void intel_haswell_fixup_connect_list(struct hda_codec *codec,
-					     hda_nid_t nid);
-
 static int hdmi_add_pin(struct hda_codec *codec, hda_nid_t pin_nid)
 {
 	struct hdmi_spec *spec = codec->spec;
@@ -1812,8 +1818,7 @@  static int hdmi_add_pin(struct hda_codec *codec, hda_nid_t pin_nid)
 		per_pin->dev_id = i;
 		per_pin->non_pcm = false;
 		snd_hda_set_dev_select(codec, pin_nid, i);
-		if (is_haswell_plus(codec))
-			intel_haswell_fixup_connect_list(codec, pin_nid);
+
 		err = hdmi_read_pin_conn(codec, pin_idx);
 		if (err < 0)
 			return err;
@@ -2468,24 +2473,6 @@  static int patch_generic_hdmi(struct hda_codec *codec)
  * Intel codec parsers and helpers
  */
 
-static void intel_haswell_fixup_connect_list(struct hda_codec *codec,
-					     hda_nid_t nid)
-{
-	struct hdmi_spec *spec = codec->spec;
-	hda_nid_t conns[4];
-	int nconns;
-
-	nconns = snd_hda_get_raw_connections(codec, nid, conns,
-					     ARRAY_SIZE(conns));
-	if (nconns == spec->num_cvts &&
-	    !memcmp(conns, spec->cvt_nids, spec->num_cvts * sizeof(hda_nid_t)))
-		return;
-
-	/* override pins connection list */
-	codec_dbg(codec, "hdmi: haswell: override pin connection 0x%x\n", nid);
-	snd_hda_override_conn_list(codec, nid, spec->num_cvts, spec->cvt_nids);
-}
-
 #define INTEL_VENDOR_NID 0x08
 #define INTEL_GLK_VENDOR_NID 0x0B
 #define INTEL_GET_VENDOR_VERB 0xf81