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drm/i915/dp: debug log max vswing and pre-emphasis

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Provide slightly more debugging help.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200117150235.22471-1-jani.nikula@intel.com
This commit is contained in:
Jani Nikula
2020-01-17 17:02:35 +02:00
parent 08b90a717f
commit 6fe20299b3
1 changed files with 8 additions and 5 deletions
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13
drivers/gpu/drm/i915/display/intel_dp.c
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@@ -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;