File 0034-alsa-ucm-correct-the-channel-default-logic-stereo.patch of Package pulseaudio

From cabd387e26b5fe03661f4b894826c7c6b58d7efa Mon Sep 17 00:00:00 2001
From: Jaroslav Kysela <perex@perex.cz>
Date: Tue, 11 Feb 2020 10:54:16 +0100
Subject: [PATCH] alsa-ucm: correct the channel default logic (stereo)

Signed-off-by: Jaroslav Kysela <perex@perex.cz>
---
 src/modules/alsa/alsa-ucm.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/src/modules/alsa/alsa-ucm.c b/src/modules/alsa/alsa-ucm.c
index a57be6d22497..b7d2c5b9c51a 100644
--- a/src/modules/alsa/alsa-ucm.c
+++ b/src/modules/alsa/alsa-ucm.c
@@ -377,6 +377,13 @@ static int ucm_get_device_property(
             pa_log("UCM playback device %s fetch pcm failed", device_name);
     }
 
+    if (pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_SINK) &&
+        device->playback_channels == 0) {
+        pa_log("UCM file does not specify 'PlaybackChannels' "
+                    "for device %s, assuming stereo duplex.", device_name);
+        device->playback_channels = 2;
+    }
+
     value = pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_CAPTURE_CHANNELS);
     if (value) { /* input */
         /* get channels */
@@ -391,10 +398,10 @@ static int ucm_get_device_property(
             pa_log("UCM capture device %s fetch pcm failed", device_name);
     }
 
-    if (device->playback_channels == 0 && device->capture_channels == 0) {
-        pa_log_warn("UCM file does not specify 'PlaybackChannels' or 'CaptureChannels'"
+    if (pa_proplist_gets(device->proplist, PA_ALSA_PROP_UCM_SOURCE) &&
+        device->capture_channels == 0) {
+        pa_log("UCM file does not specify 'CaptureChannels' "
                     "for device %s, assuming stereo duplex.", device_name);
-        device->playback_channels = 2;
         device->capture_channels = 2;
     }
 
-- 
2.16.4