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drm/radeon/atom: select the proper number of lanes in transmitter setup 

We need to check for DVI vs. HDMI when setting up duallink since
HDMI is single link only.  Fixes 4k modes on newer asics.

bug:
https://bugs.freedesktop.org/show_bug.cgi?id=75223

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
hifive-unleashed-5.1
Alex Deucher 2014-03-06 18:09:52 -05:00
parent 13714323f8
commit d03874c881
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/radeon/atombios_encoders.c
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@ -1314,7 +1314,7 @@ atombios_dig_transmitter_setup(struct drm_encoder *encoder, int action, uint8_t
}
if (is_dp)
args.v5.ucLaneNum = dp_lane_count;
else if (radeon_encoder->pixel_clock > 165000)
else if (radeon_dig_monitor_is_duallink(encoder, radeon_encoder->pixel_clock))
args.v5.ucLaneNum = 8;
else
args.v5.ucLaneNum = 4;