diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c index ded246bbf232..53480914f239 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -727,8 +727,21 @@ void intel_dp_link_training_set_mode(struct intel_dp *intel_dp, int link_rate, b static void intel_dp_update_downspread_ctrl(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state) { + /* + * Currently, we set the MSA ignore bit based on vrr.in_range. + * We can't really read that out during driver load since we don't have + * the connector information read in yet. So if we do end up doing a + * modeset during initial_commit() we'll clear the MSA ignore bit. + * GOP likely wouldn't have set this bit so after the initial commit, + * if there are no modesets and we enable VRR mode seamlessly + * (without a full modeset), the MSA ignore bit might never get set. + * + * #TODO: Implement readout of vrr.in_range. + * We need fastset support for setting the MSA ignore bit in DPCD, + * especially on the first real commit when clearing the inherited flag. + */ intel_dp_link_training_set_mode(intel_dp, - crtc_state->port_clock, crtc_state->vrr.flipline); + crtc_state->port_clock, crtc_state->vrr.in_range); } void intel_dp_link_training_set_bw(struct intel_dp *intel_dp, |