diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_dp.c')
-rw-r--r-- | drivers/gpu/drm/i915/intel_dp.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c index 1b727a5c9ee5..368ed8ef1600 100644 --- a/drivers/gpu/drm/i915/intel_dp.c +++ b/drivers/gpu/drm/i915/intel_dp.c | |||
@@ -1797,7 +1797,8 @@ intel_dp_start_link_train(struct intel_dp *intel_dp) | |||
1797 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) | 1797 | if ((intel_dp->train_set[i] & DP_TRAIN_MAX_SWING_REACHED) == 0) |
1798 | break; | 1798 | break; |
1799 | if (i == intel_dp->lane_count && voltage_tries == 5) { | 1799 | if (i == intel_dp->lane_count && voltage_tries == 5) { |
1800 | if (++loop_tries == 5) { | 1800 | ++loop_tries; |
1801 | if (loop_tries == 5) { | ||
1801 | DRM_DEBUG_KMS("too many full retries, give up\n"); | 1802 | DRM_DEBUG_KMS("too many full retries, give up\n"); |
1802 | break; | 1803 | break; |
1803 | } | 1804 | } |
@@ -1807,11 +1808,15 @@ intel_dp_start_link_train(struct intel_dp *intel_dp) | |||
1807 | } | 1808 | } |
1808 | 1809 | ||
1809 | /* Check to see if we've tried the same voltage 5 times */ | 1810 | /* Check to see if we've tried the same voltage 5 times */ |
1810 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) != voltage) { | 1811 | if ((intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK) == voltage) { |
1811 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; | ||
1812 | voltage_tries = 0; | ||
1813 | } else | ||
1814 | ++voltage_tries; | 1812 | ++voltage_tries; |
1813 | if (voltage_tries == 5) { | ||
1814 | DRM_DEBUG_KMS("too many voltage retries, give up\n"); | ||
1815 | break; | ||
1816 | } | ||
1817 | } else | ||
1818 | voltage_tries = 0; | ||
1819 | voltage = intel_dp->train_set[0] & DP_TRAIN_VOLTAGE_SWING_MASK; | ||
1815 | 1820 | ||
1816 | /* Compute new intel_dp->train_set as requested by target */ | 1821 | /* Compute new intel_dp->train_set as requested by target */ |
1817 | intel_get_adjust_train(intel_dp, link_status); | 1822 | intel_get_adjust_train(intel_dp, link_status); |