Attachment 95261 Details for Bug 75223 – possible fix

[patch] possible fix

0001-drm-radeon-atom-select-the-proper-number-of-lanes-in.patch (text/plain), 1.19 KB, created by Alex Deucher on 2014-03-06 23:13:22 UTC

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Creator: Alex Deucher

Created: 2014-03-06 23:13:22 UTC

Size: 1.19 KB

patch

obsolete

>From d03874c881a049a50e12f285077ab1f9fc2686e1 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Thu, 6 Mar 2014 18:09:52 -0500
>Subject: [PATCH] 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
>---
> drivers/gpu/drm/radeon/atombios_encoders.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
>index 2cec2ab..607dc14 100644
>--- a/drivers/gpu/drm/radeon/atombios_encoders.c
>+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
>@@ -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;
>-- 
>1.8.3.1
>

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