diff options
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.c | 18 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.h | 2 |
2 files changed, 14 insertions, 6 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 322a26c1910c..57b9dc52a98d 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -478,12 +478,13 @@ static u8 intel_dp_get_lane_adjust_train(struct intel_dp *intel_dp, _TRAIN_REQ_TX_FFE_ARGS(link_status, 2), \ _TRAIN_REQ_TX_FFE_ARGS(link_status, 3) -void +bool intel_dp_get_adjust_train(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state, enum drm_dp_phy dp_phy, const u8 link_status[DP_LINK_STATUS_SIZE]) { + bool changed = false; int lane; if (intel_dp_is_uhbr(crtc_state)) { @@ -502,10 +503,17 @@ intel_dp_get_adjust_train(struct intel_dp *intel_dp, TRAIN_REQ_PREEMPH_ARGS(link_status)); } - for (lane = 0; lane < 4; lane++) - intel_dp->train_set[lane] = - intel_dp_get_lane_adjust_train(intel_dp, crtc_state, - dp_phy, link_status, lane); + for (lane = 0; lane < 4; lane++) { + u8 new = intel_dp_get_lane_adjust_train(intel_dp, crtc_state, + dp_phy, link_status, lane); + if (intel_dp->train_set[lane] == new) + continue; + + intel_dp->train_set[lane] = new; + changed = true; + } + + return changed; } static int intel_dp_training_pattern_set_reg(struct intel_dp *intel_dp, diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.h b/drivers/gpu/drm/i915/display/intel_dp_link_training.h index 46614124569f..1ba22ed6db08 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.h +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.h @@ -23,7 +23,7 @@ void intel_dp_link_training_set_bw(struct intel_dp *intel_dp, int link_bw, int rate_select, int lane_count, bool enhanced_framing); -void intel_dp_get_adjust_train(struct intel_dp *intel_dp, +bool intel_dp_get_adjust_train(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state, enum drm_dp_phy dp_phy, const u8 link_status[DP_LINK_STATUS_SIZE]); |