diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2021-10-04 20:05:33 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2021-10-06 22:12:51 +0300 |
| commit | 1f662675335b884fe76a7899901b0761fa2e472e (patch) | |
| tree | 2add2e586e0ef8f9e25f4f1d90dd5c46c50c284d | |
| parent | be1525048c587efbe8e647a3980d75244b55abc6 (diff) | |
drm/i915: Print the DP vswing adjustment request
Print out each DP vswing adjustment request we got from the RX.
Could help in diagnosing what's going on during link training.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211004170535.4173-4-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_link_training.c | 27 |
1 files changed, 27 insertions, 0 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 6bab097cafd2..5657be1461ec 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c +++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c @@ -343,14 +343,41 @@ static u8 intel_dp_get_lane_adjust_train(struct intel_dp *intel_dp, return v | p; } +#define TRAIN_REQ_FMT "%d/%d/%d/%d" +#define _TRAIN_REQ_VSWING_ARGS(link_status, lane) \ + (drm_dp_get_adjust_request_voltage((link_status), (lane)) >> DP_TRAIN_VOLTAGE_SWING_SHIFT) +#define TRAIN_REQ_VSWING_ARGS(link_status) \ + _TRAIN_REQ_VSWING_ARGS(link_status, 0), \ + _TRAIN_REQ_VSWING_ARGS(link_status, 1), \ + _TRAIN_REQ_VSWING_ARGS(link_status, 2), \ + _TRAIN_REQ_VSWING_ARGS(link_status, 3) +#define _TRAIN_REQ_PREEMPH_ARGS(link_status, lane) \ + (drm_dp_get_adjust_request_pre_emphasis((link_status), (lane)) >> DP_TRAIN_PRE_EMPHASIS_SHIFT) +#define TRAIN_REQ_PREEMPH_ARGS(link_status) \ + _TRAIN_REQ_PREEMPH_ARGS(link_status, 0), \ + _TRAIN_REQ_PREEMPH_ARGS(link_status, 1), \ + _TRAIN_REQ_PREEMPH_ARGS(link_status, 2), \ + _TRAIN_REQ_PREEMPH_ARGS(link_status, 3) + void 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]) { + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base; + char phy_name[10]; int lane; + drm_dbg_kms(encoder->base.dev, "[ENCODER:%d:%s] lanes: %d, " + "vswing request: " TRAIN_REQ_FMT ", " + "pre-emphasis request: " TRAIN_REQ_FMT ", at %s\n", + encoder->base.base.id, encoder->base.name, + crtc_state->lane_count, + TRAIN_REQ_VSWING_ARGS(link_status), + TRAIN_REQ_PREEMPH_ARGS(link_status), + intel_dp_phy_name(dp_phy, phy_name, sizeof(phy_name))); + for (lane = 0; lane < 4; lane++) intel_dp->train_set[lane] = intel_dp_get_lane_adjust_train(intel_dp, crtc_state, |