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| author | Mario Kleiner <mario.kleiner.de@gmail.com> | 2016-03-06 04:39:53 +0300 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-04-18 15:49:26 +0300 |
| commit | bfe0248670a2e877c97f6509888dea50b453a8bb (patch) | |
| tree | ad276b5f72f0b5640c2add93012c19f3c8ac4435 /drivers/gpu | |
| parent | 0c4ed2f42fdd3c471f9aba2f051a22ca362c23bd (diff) | |
| download | linux-bfe0248670a2e877c97f6509888dea50b453a8bb.tar.xz | |
drm/radeon: Don't drop DP 2.7 Ghz link setup on some cards.
[ Upstream commit 459ee1c3fd097ab56ababd8ff4bb7ef6a792de33 ]
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>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_encoders.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c index d8a5db204a81..01701105653d 100644 --- a/drivers/gpu/drm/radeon/atombios_encoders.c +++ b/drivers/gpu/drm/radeon/atombios_encoders.c @@ -872,8 +872,6 @@ atombios_dig_encoder_setup(struct drm_encoder *encoder, int action, int panel_mo 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; @@ -890,6 +888,10 @@ atombios_dig_encoder_setup(struct drm_encoder *encoder, int action, int panel_mo 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: |