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: fd0141d ("drm/bridge: synopsys: Add audio support for dw-hdmi-qp")
Reported-by: Christian Hewitt <[email protected]>
Signed-off-by: Jonas Karlman <[email protected]>
Signed-off-by: Christian Hewitt <[email protected]>
Reviewed-by: Cristian Ciocaltea <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Luca Ceresoli <[email protected]>

Author: Kwiboo

drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c

@@ -848,7 +848,7 @@ static int dw_hdmi_qp_config_audio_infoframe(struct dw_hdmi_qp *hdmi,
 
 	regmap_bulk_write(hdmi->regm, PKT_AUDI_CONTENTS0, &header_bytes, 1);
 	regmap_bulk_write(hdmi->regm, PKT_AUDI_CONTENTS1, &buffer[3], 1);
-	regmap_bulk_write(hdmi->regm, PKT_AUDI_CONTENTS2, &buffer[4], 1);
+	regmap_bulk_write(hdmi->regm, PKT_AUDI_CONTENTS2, &buffer[7], 1);
 
 	/* Enable ACR, AUDI, AMD */
 	dw_hdmi_qp_mod(hdmi,