From: Dave Stevenson dave.stevenson@raspberrypi.com
ALSA's iec958 plugin by default sets the block start preamble to 8, whilst this driver was programming the hardware to expect 0xF. Amend the hardware config to match ALSA.
Signed-off-by: Dave Stevenson dave.stevenson@raspberrypi.com Signed-off-by: Maxime Ripard maxime@cerno.tech --- drivers/gpu/drm/vc4/vc4_hdmi.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/vc4/vc4_hdmi.c b/drivers/gpu/drm/vc4/vc4_hdmi.c index c96d9f2af2bf..e1ef0907a827 100644 --- a/drivers/gpu/drm/vc4/vc4_hdmi.c +++ b/drivers/gpu/drm/vc4/vc4_hdmi.c @@ -754,10 +754,11 @@ static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
vc4_hdmi_audio_set_mai_clock(vc4_hdmi);
+ /* The B frame identifier should match the value used by alsa-lib (8) */ audio_packet_config = VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_SAMPLE_FLAT | VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_INACTIVE_CHANNELS | - VC4_SET_FIELD(0xf, VC4_HDMI_AUDIO_PACKET_B_FRAME_IDENTIFIER); + VC4_SET_FIELD(0x8, VC4_HDMI_AUDIO_PACKET_B_FRAME_IDENTIFIER);
channel_mask = GENMASK(vc4_hdmi->audio.channels - 1, 0); audio_packet_config |= VC4_SET_FIELD(channel_mask,