blob: 38f2f9e3bc12e680a4fcffda247e40783d9d9507 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
From 45c687c5fafe29d1b3258e28c807826d1617ad17 Mon Sep 17 00:00:00 2001
From: Harry Wentland <harry.wentland@amd.com>
Date: Tue, 21 Nov 2017 13:34:48 -0500
Subject: [PATCH 4329/5725] drm/amd/display: Use HBR2 if eDP monitor it doesn't
advertise link rate
Some eDP displays use the extra link rate table to advertise link rate
support. If they do that they don't need to provide link rate through
the usual registers. Since we don't currently have support for the extra
link rate table default to HBR2 for the display in this.
Note that this is a HACK. Ultimately we need to teach DC to use the
extra link rate table.
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index a6dcd42..7f0fdf7 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -2396,6 +2396,10 @@ bool detect_dp_sink_caps(struct dc_link *link)
void detect_edp_sink_caps(struct dc_link *link)
{
retrieve_link_cap(link);
+
+ if (link->reported_link_cap.link_rate == LINK_RATE_UNKNOWN)
+ link->reported_link_cap.link_rate = LINK_RATE_HIGH2;
+
link->verified_link_cap = link->reported_link_cap;
}
--
2.7.4
|
