[PATCH v4 19/27] drm/amd/display: Trigger ALLM if it's available

[Tomasz Pakuła]

[Why]
ALLM automatically puts TVs into low latency modes (gaming modes) which
we basically always want for PC use, be it gaming, or using precise
inputs like mice and keyboards.

[How]
Read the ALLM info from HDMI caps and use it to determine if ALLM should
be indicated in HDMI Forum vsif. Additionally, make sure VIC modes are
translated in case of ALLM active as VIC cannot be used in conjunction
with hf-vsif. I learned this the hard way...

Signed-off-by: Tomasz Pakuła <tomasz.pakula.oficjalny@xxxxxxxxx>
Reviewed-by: Harry Wentland <harry.wentland@xxxxxxx>
---
 .../gpu/drm/amd/display/modules/info_packet/info_packet.c  | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/modules/info_packet/info_packet.c b/drivers/gpu/drm/amd/display/modules/info_packet/info_packet.c
index 8e110c86bdd4..53e488fdb4ea 100644
--- a/drivers/gpu/drm/amd/display/modules/info_packet/info_packet.c
+++ b/drivers/gpu/drm/amd/display/modules/info_packet/info_packet.c
@@ -541,9 +541,10 @@ void mod_build_hf_vsif_infopacket(const struct dc_stream_state *stream,
 
 		info_packet->valid = false;
 
-		format = stream->timing.timing_3d_format;
-		if (stream->view_format == VIEW_3D_FORMAT_NONE)
-			format = TIMING_3D_FORMAT_NONE;
+		allm = stream->link->local_sink->edid_caps.allm;
+		format = stream->view_format == VIEW_3D_FORMAT_NONE ?
+			 TIMING_3D_FORMAT_NONE :
+			 stream->timing.timing_3d_format;
 		stereo = format != TIMING_3D_FORMAT_NONE;
 		hdmi_vic_mode = is_hdmi_vic_mode(stream);
 
-- 
2.53.0