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| Started by | Ben Hutchings <ben@decadent.org.uk> |
|---|---|
| First post | 2016-04-27 01:30 +0200 |
| Last post | 2016-04-27 01:30 +0200 |
| Articles | 1 — 1 participant |
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[PATCH 3.16 085/217] drm/radeon: Don't drop DP 2.7 Ghz link setup on some cards. Ben Hutchings <ben@decadent.org.uk> - 2016-04-27 01:30 +0200
| From | Ben Hutchings <ben@decadent.org.uk> |
|---|---|
| Date | 2016-04-27 01:30 +0200 |
| Subject | [PATCH 3.16 085/217] drm/radeon: Don't drop DP 2.7 Ghz link setup on some cards. |
| Message-ID | <rskAC-7Vw-135@gated-at.bofh.it> |
3.16.35-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Mario Kleiner <mario.kleiner.de@gmail.com>
commit 459ee1c3fd097ab56ababd8ff4bb7ef6a792de33 upstream.
As observed on Apple iMac10,1, DCE-3.2, RV-730,
link rate of 2.7 Ghz is not selected, because
the args.v1.ucConfig flag setting for 2.7 Ghz
gets overwritten by a following assignment of
the transmitter to use.
Move link rate setup a few lines down to fix this.
In practice this didn't have any positive or
negative effect on display setup on the tested
iMac10,1 so i don't know if backporting to stable
makes sense or not.
Signed-off-by: Mario Kleiner <mario.kleiner.de@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
drivers/gpu/drm/radeon/atombios_encoders.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -896,8 +896,6 @@ atombios_dig_encoder_setup(struct drm_en
else
args.v1.ucLaneNum = 4;
- if (ENCODER_MODE_IS_DP(args.v1.ucEncoderMode) && (dp_clock == 270000))
- args.v1.ucConfig |= ATOM_ENCODER_CONFIG_DPLINKRATE_2_70GHZ;
switch (radeon_encoder->encoder_id) {
case ENCODER_OBJECT_ID_INTERNAL_UNIPHY:
args.v1.ucConfig = ATOM_ENCODER_CONFIG_V2_TRANSMITTER1;
@@ -914,6 +912,10 @@ atombios_dig_encoder_setup(struct drm_en
args.v1.ucConfig |= ATOM_ENCODER_CONFIG_LINKB;
else
args.v1.ucConfig |= ATOM_ENCODER_CONFIG_LINKA;
+
+ if (ENCODER_MODE_IS_DP(args.v1.ucEncoderMode) && (dp_clock == 270000))
+ args.v1.ucConfig |= ATOM_ENCODER_CONFIG_DPLINKRATE_2_70GHZ;
+
break;
case 2:
case 3:
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