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From 465b5e6889b1af1c9c061751a0ee234a27644030 Mon Sep 17 00:00:00 2001
From: Dom Cobley <popcornmix@gmail.com>
Date: Fri, 10 Jul 2020 11:51:16 +0100
Subject: [PATCH] drm/vc4: enable HBR MAI format on HBR streams

Signed-off-by: Matthias Reichl <hias@horus.com>
---
 drivers/gpu/drm/vc4/vc4_hdmi.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -1069,7 +1069,11 @@ static int vc4_hdmi_audio_prepare(struct
 	vc4_hdmi_audio_set_mai_clock(vc4_hdmi);
 
 	mai_sample_rate = sample_rate_to_mai_fmt(vc4_hdmi->audio.samplerate);
-	mai_audio_format = VC4_HDMI_MAI_FORMAT_PCM;
+	if (vc4_hdmi->audio.iec_status[0] & IEC958_AES0_NONAUDIO &&
+	    vc4_hdmi->audio.channels == 8)
+		mai_audio_format = VC4_HDMI_MAI_FORMAT_HBR;
+	else
+		mai_audio_format = VC4_HDMI_MAI_FORMAT_PCM;
 	HDMI_WRITE(HDMI_MAI_FMT,
 		   VC4_SET_FIELD(mai_sample_rate,
 				 VC4_HDMI_MAI_FORMAT_SAMPLE_RATE) |