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| author | Imre Deak <imre.deak@intel.com> | 2024-06-10 19:49:20 +0300 |
|---|---|---|
| committer | Imre Deak <imre.deak@intel.com> | 2024-06-13 21:26:49 +0300 |
| commit | 5bd3e7ea8854601866bac507b3cdda5fd3a29c15 (patch) | |
| tree | d915b792c099a937eac8579afd8172521f7b5c11 /drivers/gpu/drm/i915/display/intel_dp.c | |
| parent | 3b3be899fc81d5957c5dba8907263b52d92993ed (diff) | |
| download | linux-5bd3e7ea8854601866bac507b3cdda5fd3a29c15.tar.gz linux-5bd3e7ea8854601866bac507b3cdda5fd3a29c15.tar.bz2 linux-5bd3e7ea8854601866bac507b3cdda5fd3a29c15.zip | |
drm/i915/dp: Reduce link params only after retrying with unchanged params
Try to maintain the current link parameters by retrying the link
training with unchanged link parameters before reducing these parameters
(sending an uevent to userspace to retrain the link instead).
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240610164933.2947366-9-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 0833302baabc..5f54b0a9f597 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2961,6 +2961,7 @@ static void intel_dp_reset_link_params(struct intel_dp *intel_dp) { intel_dp->link.max_lane_count = intel_dp_max_common_lane_count(intel_dp); intel_dp->link.max_rate = intel_dp_max_common_rate(intel_dp); + intel_dp->link.seq_train_failures = 0; } /* Enable backlight PWM and backlight PP control. */ @@ -5075,6 +5076,9 @@ intel_dp_needs_link_retrain(struct intel_dp *intel_dp) intel_dp->lane_count)) return false; + if (intel_dp->link.seq_train_failures) + return true; + /* Retrain if link not ok */ return !intel_dp_link_ok(intel_dp, link_status); } |