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drm/i915/dp: return proper DPRX link training result

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After DPRX link training, intel_dp_link_train_phy() did not
return the training result properly. If link training failed,
i915 driver would not run into link train fallback function.
And no hotplug uevent would be received by user space application.

Fixes: b30edfd8d0 ("drm/i915: Switch to LTTPR non-transparent mode link training")
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: Cooper Chiou <cooper.chiou@intel.com>
Cc: William Tseng <william.tseng@intel.com>
Signed-off-by: Lee Shawn C <shawn.c.lee@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210706152541.25021-1-shawn.c.lee@intel.com
(cherry picked from commit dab1b47e57)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Lee Shawn C 2021-07-06 23:25:41 +08:00 committed by Jani Nikula
parent 6880fa6c56
commit 9af4bf2171
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/i915/display/intel_dp_link_training.c
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@ -848,7 +848,7 @@ intel_dp_link_train_all_phys(struct intel_dp *intel_dp,
}
if (ret)
intel_dp_link_train_phy(intel_dp, crtc_state, DP_PHY_DPRX);
ret = intel_dp_link_train_phy(intel_dp, crtc_state, DP_PHY_DPRX);
if (intel_dp->set_idle_link_train)
intel_dp->set_idle_link_train(intel_dp, crtc_state);