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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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drm/bridge: dw-hdmi-qp: fix multi-channel audio output

Channel Allocation (PB4) and Level Shift Information (PB5) are
configured with values from PB1 and PB2 due to the wrong offset
being used. This results in missing audio channels or incorrect
speaker placement when playing multi-channel audio.

Use the correct offset to fix multi-channel audio output.

Fixes: fd0141d1a8a2 ("drm/bridge: synopsys: Add audio support for dw-hdmi-qp")
Reported-by: Christian Hewitt <christianshewitt@gmail.com>
Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Reviewed-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://patch.msgid.link/20260228112822.4056354-1-christianshewitt@gmail.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>

authored by

Jonas Karlman and committed by
Luca Ceresoli cffcb42c 6bee098b

+1 -1
+1 -1
drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
··· 848 848 849 849 regmap_bulk_write(hdmi->regm, PKT_AUDI_CONTENTS0, &header_bytes, 1); 850 850 regmap_bulk_write(hdmi->regm, PKT_AUDI_CONTENTS1, &buffer[3], 1); 851 - regmap_bulk_write(hdmi->regm, PKT_AUDI_CONTENTS2, &buffer[4], 1); 851 + regmap_bulk_write(hdmi->regm, PKT_AUDI_CONTENTS2, &buffer[7], 1); 852 852 853 853 /* Enable ACR, AUDI, AMD */ 854 854 dw_hdmi_qp_mod(hdmi,