5.15-stable review patch. If anyone has any objections, please let me know.
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From: Imre Deak imre.deak@intel.com
commit d13e2a6e95e6b87f571c837c71a3d05691def9bb upstream.
Regularly retraining a link during an atomic commit happens with the given pipe/link already disabled and hence intel_dp->link_trained being false. Ensure this also for retraining a DP SST link via direct calls to the link training functions (vs. an actual commit as for DP MST). So far nothing depended on this, however the next patch will depend on link_trained==false for changing the LTTPR mode to non-transparent.
Cc: stable@vger.kernel.org # v5.15+ Cc: Ville Syrjälä ville.syrjala@linux.intel.com Reviewed-by: Ankit Nautiyal ankit.k.nautiyal@intel.com Signed-off-by: Imre Deak imre.deak@intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20240708190029.271247-2-imre.d... (cherry picked from commit a4d5ce61765c08ab364aa4b327f6739b646e6cfa) Signed-off-by: Tvrtko Ursulin tursulin@ursulin.net Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/i915/display/intel_dp.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -3627,6 +3627,8 @@ int intel_dp_retrain_link(struct intel_e !intel_dp_mst_is_master_trans(crtc_state)) continue;
+ intel_dp->link_trained = false; + intel_dp_check_frl_training(intel_dp); intel_dp_pcon_dsc_configure(intel_dp, crtc_state); intel_dp_start_link_train(intel_dp, crtc_state);