diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Set-the-b-frame-marker-to-the-match-ALSA-s-d.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Set-the-b-frame-marker-to-the-match-ALSA-s-d.patch | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Set-the-b-frame-marker-to-the-match-ALSA-s-d.patch b/target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Set-the-b-frame-marker-to-the-match-ALSA-s-d.patch new file mode 100644 index 0000000000..4827f96023 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0606-drm-vc4-Set-the-b-frame-marker-to-the-match-ALSA-s-d.patch @@ -0,0 +1,31 @@ +From 1cf3e20f13378430cd1fc929548bca9f5e517afe Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Wed, 25 Mar 2020 18:03:42 +0000 +Subject: [PATCH] drm/vc4: Set the b-frame marker to the match ALSA's + default. + +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> +--- + drivers/gpu/drm/vc4/vc4_hdmi.c | 3 ++- + 1 file changed, 2 insertions(+), 1 deletion(-) + +--- a/drivers/gpu/drm/vc4/vc4_hdmi.c ++++ b/drivers/gpu/drm/vc4/vc4_hdmi.c +@@ -885,10 +885,11 @@ static int vc4_hdmi_audio_hw_params(stru + + 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, |