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Added patch to Ravenna driver to enable mono channel configuration for playback and capture devices.

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Without this patch a Source or Sink configured with a single channel fail to work as expected.
This commit is contained in:
Andrea Bondavalli 2021-01-31 18:12:09 +01:00
parent aa8c08d8a9
commit 143d98dee5
2 changed files with 24 additions and 0 deletions
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23
3rdparty/patches/ravenna-alsa-lkm-enable-mono-channels.patch vendored Normal file
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@ -0,0 +1,23 @@
diff --git a/driver/audio_driver.c b/driver/audio_driver.c
index 3d9debd..339327b 100644
--- a/driver/audio_driver.c
+++ b/driver/audio_driver.c
@@ -1106,7 +1130,7 @@ static struct snd_pcm_hardware mr_alsa_audio_pcm_hardware_playback =
.rates = (SNDRV_PCM_RATE_KNOT|SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_176400|SNDRV_PCM_RATE_192000),
.rate_min = 44100,
.rate_max = 384000,
- .channels_min = 2,
+ .channels_min = 1,
.channels_max = MR_ALSA_NB_CHANNELS_MAX,
.buffer_bytes_max = MR_ALSA_RINGBUFFER_NB_FRAMES * MR_ALSA_NB_CHANNELS_MAX * 4, // 4 bytes per sample, 128 ch
.period_bytes_min = MR_ALSA_NB_FRAMES_PER_PERIOD_AT_1FS * 2 * 3, // amount of data in bytes for 8 channels, 24bit samples, at 1Fs
@@ -1135,7 +1159,7 @@ static struct snd_pcm_hardware mr_alsa_audio_pcm_hardware_capture =
.rates = (SNDRV_PCM_RATE_KNOT|SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000|SNDRV_PCM_RATE_88200|SNDRV_PCM_RATE_96000|SNDRV_PCM_RATE_176400|SNDRV_PCM_RATE_192000),
.rate_min = 44100,
.rate_max = 384000,
- .channels_min = 2,
+ .channels_min = 1,
.channels_max = MR_ALSA_NB_CHANNELS_MAX,
.buffer_bytes_max = MR_ALSA_RINGBUFFER_NB_FRAMES * MR_ALSA_NB_CHANNELS_MAX * 4, // 4 bytes per sample, 128 ch
.period_bytes_min = MR_ALSA_NB_FRAMES_PER_PERIOD_AT_1FS * 2 * 4, // amount of data in bytes for 8 channels, 24bit samples, at 1Fs

1
build.sh
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@ -23,6 +23,7 @@ if [ ! -d ravenna-alsa-lkm.git ]; then
git apply ../patches/ravenna-alsa-lkm-disable-ptp-checksum.patch git apply ../patches/ravenna-alsa-lkm-disable-ptp-checksum.patch
git apply ../patches/ravenna-alsa-lkm-independent-playback-capture.patch git apply ../patches/ravenna-alsa-lkm-independent-playback-capture.patch
git apply ../patches/ravenna-alsa-lkm-direct-pcm-transfer.patch git apply ../patches/ravenna-alsa-lkm-direct-pcm-transfer.patch
git apply ../patches/ravenna-alsa-lkm-enable-mono-channels.patch
echo "Building ravenna-alsa-lkm kernel module ..." echo "Building ravenna-alsa-lkm kernel module ..."
cd driver cd driver
make make