From 6fe20299b3eec33e544485f5fc65524f145465be Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Fri, 17 Jan 2020 17:02:35 +0200 Subject: [PATCH] drm/i915/dp: debug log max vswing and pre-emphasis MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Provide slightly more debugging help. Reviewed-by: Ville Syrjälä Signed-off-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20200117150235.22471-1-jani.nikula@intel.com --- drivers/gpu/drm/i915/display/intel_dp.c | 13 ++++++++----- 1 file changed, 8 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 3bfbd2b9a53e..031186910dd4 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -4142,11 +4142,14 @@ intel_dp_set_signal_levels(struct intel_dp *intel_dp) if (mask) DRM_DEBUG_KMS("Using signal levels %08x\n", signal_levels); - DRM_DEBUG_KMS("Using vswing level %d\n", - train_set & DP_TRAIN_VOLTAGE_SWING_MASK); - DRM_DEBUG_KMS("Using pre-emphasis level %d\n", - (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) >> - DP_TRAIN_PRE_EMPHASIS_SHIFT); + DRM_DEBUG_KMS("Using vswing level %d%s\n", + train_set & DP_TRAIN_VOLTAGE_SWING_MASK, + train_set & DP_TRAIN_MAX_SWING_REACHED ? " (max)" : ""); + DRM_DEBUG_KMS("Using pre-emphasis level %d%s\n", + (train_set & DP_TRAIN_PRE_EMPHASIS_MASK) >> + DP_TRAIN_PRE_EMPHASIS_SHIFT, + train_set & DP_TRAIN_MAX_PRE_EMPHASIS_REACHED ? + " (max)" : ""); intel_dp->DP = (intel_dp->DP & ~mask) | signal_levels; -- 2.11.0