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32 lines
1.2 KiB
Diff
32 lines
1.2 KiB
Diff
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From 1cf3e20f13378430cd1fc929548bca9f5e517afe Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Wed, 25 Mar 2020 18:03:42 +0000
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Subject: [PATCH] drm/vc4: Set the b-frame marker to the match ALSA's
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default.
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ALSA's iec958 plugin by default sets the block start preamble
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to 8, whilst this driver was programming the hardware to expect
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0xF.
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Amend the hardware config to match ALSA.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/vc4/vc4_hdmi.c | 3 ++-
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1 file changed, 2 insertions(+), 1 deletion(-)
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--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
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+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
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@@ -885,10 +885,11 @@ static int vc4_hdmi_audio_hw_params(stru
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vc4_hdmi_audio_set_mai_clock(vc4_hdmi);
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+ /* The B frame identifier should match the value used by alsa-lib (8) */
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audio_packet_config =
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VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_SAMPLE_FLAT |
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VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_INACTIVE_CHANNELS |
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- VC4_SET_FIELD(0xf, VC4_HDMI_AUDIO_PACKET_B_FRAME_IDENTIFIER);
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+ VC4_SET_FIELD(0x8, VC4_HDMI_AUDIO_PACKET_B_FRAME_IDENTIFIER);
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channel_mask = GENMASK(vc4_hdmi->audio.channels - 1, 0);
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audio_packet_config |= VC4_SET_FIELD(channel_mask,
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