From: Dave Airlie <airlied@gmail.com>
To: dri-devel@lists.freedesktop.org
Subject: [PATCH 1/2] drm/radeon/mst: fix regression in lane/link handling.
Date: Tue, 22 Mar 2016 09:38:18 +1000 [thread overview]
Message-ID: <1458603499-4474-1-git-send-email-airlied@gmail.com> (raw)
From: Dave Airlie <airlied@redhat.com>
The function this used changed in
092c96a8ab9d1bd60ada2ed385cc364ce084180e
drm/radeon: fix dp link rate selection (v2)
However for MST we should just always train to the
max link/rate. Though we probably need to limit this
for future hw, in theory radeon won't support it.
This fixes my 30" monitor with MST enabled.
Cc: stable@vger.kernel.org # v4.4
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
drivers/gpu/drm/radeon/radeon_dp_mst.c | 12 ++----------
1 file changed, 2 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/radeon/radeon_dp_mst.c b/drivers/gpu/drm/radeon/radeon_dp_mst.c
index df7a171..9d210bb 100644
--- a/drivers/gpu/drm/radeon/radeon_dp_mst.c
+++ b/drivers/gpu/drm/radeon/radeon_dp_mst.c
@@ -525,17 +525,9 @@ static bool radeon_mst_mode_fixup(struct drm_encoder *encoder,
drm_mode_set_crtcinfo(adjusted_mode, 0);
{
struct radeon_connector_atom_dig *dig_connector;
- int ret;
-
dig_connector = mst_enc->connector->con_priv;
- ret = radeon_dp_get_dp_link_config(&mst_enc->connector->base,
- dig_connector->dpcd, adjusted_mode->clock,
- &dig_connector->dp_lane_count,
- &dig_connector->dp_clock);
- if (ret) {
- dig_connector->dp_lane_count = 0;
- dig_connector->dp_clock = 0;
- }
+ dig_connector->dp_lane_count = drm_dp_max_lane_count(dig_connector->dpcd);
+ dig_connector->dp_clock = drm_dp_max_link_rate(dig_connector->dpcd);
DRM_DEBUG_KMS("dig clock %p %d %d\n", dig_connector,
dig_connector->dp_lane_count, dig_connector->dp_clock);
}
--
2.5.0
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next reply other threads:[~2016-03-21 23:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-21 23:38 Dave Airlie [this message]
2016-03-21 23:38 ` [PATCH 2/2] drm/radeon/mst: cleanup code indentation Dave Airlie
2016-03-22 20:06 ` Alex Deucher
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