When a DP connector is forced on using using the video=<connector>:e kernel command line, we bypass the calls to check if the port is connected and also bypass the call to intel_dp_detect_dpcd(); The result is that we don't query for the sink capabilities like the max link bandwidth. The sink capabilities are needed to set a mode. The solution is to add a call to intel_dp_detect_dpcd() in the code path for forced on DP connectors. Signed-off-by: Bob Paauwe <bob.j.paauwe@xxxxxxxxx> --- drivers/gpu/drm/i915/intel_dp.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 8aa9214..39b7f6d 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c @@ -4644,6 +4644,8 @@ intel_dp_force(struct drm_connector *connector) power_domain = intel_display_port_aux_power_domain(intel_encoder); intel_display_power_get(dev_priv, power_domain); + intel_dp_detect_dpcd(intel_dp); + intel_dp_set_edid(intel_dp); intel_display_power_put(dev_priv, power_domain); -- 2.4.3 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
