[PATCH 4.15 059/105] drm/amd/display: Add one to EDIDs audio channel count when passing to DC

[Greg Kroah-Hartman]

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Harry Wentland <harry.wentland@xxxxxxx>

commit 731a373698c9675d5aed8a30d8c9861bea9c41a2 upstream.

DC takes channel count to mean the actual count. cea_sad's channels
represent it as number of channels - 1.

Signed-off-by: Harry Wentland <harry.wentland@xxxxxxx>
Reviewed-by: Tony Cheng <Tony.Cheng@xxxxxxx>
Acked-by: Harry Wentland <harry.wentland@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
@@ -109,7 +109,7 @@ enum dc_edid_status dm_helpers_parse_edi
 		struct cea_sad *sad = &sads[i];
 
 		edid_caps->audio_modes[i].format_code = sad->format;
-		edid_caps->audio_modes[i].channel_count = sad->channels;
+		edid_caps->audio_modes[i].channel_count = sad->channels + 1;
 		edid_caps->audio_modes[i].sample_rate = sad->freq;
 		edid_caps->audio_modes[i].sample_size = sad->byte2;
 	}