diff options
Diffstat (limited to 'CI-2-6-drm-i915-dp-Restrict-link-retrain-workaround-to-external-monitors.patch')
| -rw-r--r-- | CI-2-6-drm-i915-dp-Restrict-link-retrain-workaround-to-external-monitors.patch | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/CI-2-6-drm-i915-dp-Restrict-link-retrain-workaround-to-external-monitors.patch b/CI-2-6-drm-i915-dp-Restrict-link-retrain-workaround-to-external-monitors.patch new file mode 100644 index 000000000..bb9106d05 --- /dev/null +++ b/CI-2-6-drm-i915-dp-Restrict-link-retrain-workaround-to-external-monitors.patch @@ -0,0 +1,55 @@ +From patchwork Thu Sep 27 20:57:31 2018 +Content-Type: text/plain; charset="utf-8" +MIME-Version: 1.0 +Content-Transfer-Encoding: 8bit +Subject: [CI, 2/6] drm/i915/dp: Restrict link retrain workaround to external + monitors +From: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> +X-Patchwork-Id: 253514 +Message-Id: <20180927205735.16651-2-dhinakaran.pandiyan@intel.com> +To: intel-gfx@lists.freedesktop.org +Date: Thu, 27 Sep 2018 13:57:31 -0700 + +Commit '3cf71bc9904d ("drm/i915: Re-apply "Perform link quality check, +unconditionally during long pulse"")' applies a work around for sinks +that don't signal link loss. The work around does not need to have to be +that broad as the issue was seen with only one particular monitor; limit +this only for external displays as eDP features like PSR turn off the link +and the driver ends up retraining the link seeeing that link is not +synchronized. + +Cc: Lyude Paul <lyude@redhat.com> +Cc: Jan-Marek Glogowski <glogow@fbihome.de> +Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> +Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> +References: 3cf71bc9904d ("drm/i915: Re-apply "Perform link quality check, unconditionally during long pulse"") +Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com> +Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> +--- + drivers/gpu/drm/i915/intel_dp.c | 13 +++++++------ + 1 file changed, 7 insertions(+), 6 deletions(-) + +diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c +index 207b3ea2ed1a..4e0870f3a4a5 100644 +--- a/drivers/gpu/drm/i915/intel_dp.c ++++ b/drivers/gpu/drm/i915/intel_dp.c +@@ -5072,12 +5072,13 @@ intel_dp_long_pulse(struct intel_connector *connector, + */ + status = connector_status_disconnected; + goto out; +- } else { +- /* +- * Some external monitors do not signal loss of link +- * synchronization with an IRQ_HPD, so force a link status +- * check. +- */ ++ } ++ ++ /* ++ * Some external monitors do not signal loss of link synchronization ++ * with an IRQ_HPD, so force a link status check. ++ */ ++ if (!intel_dp_is_edp(intel_dp)) { + struct intel_encoder *encoder = &dp_to_dig_port(intel_dp)->base; + + intel_dp_retrain_link(encoder, ctx); |