Commit e7250918 authored by Arun R Murthy's avatar Arun R Murthy Committed by Suraj Kandpal
Browse files

drm/i915/dp: Include the time taken by AUX Tx for timeout 



As per DP spec the timeout for LANE_CHANNEL_EQ_DONE is 400ms. But this
timeout value is exclusively for the Aux RD Interval and excludes the
time consumed for the AUX Tx (i.e reading/writing FFE presets). Add
another 50ms for these AUX Tx to the 400ms timeout.
Ref: "Figure 3-52: 128b132b DP DPTC LANEx_CHANNEL_EQ_DONE Sequence" of
DP2.1a spec.

Co-developed-by: default avatarSrikanth V NagaVenkata <nagavenkata.srikanth.v@intel.com>
Signed-off-by: default avatarArun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: default avatarSuraj Kandpal <suraj.kandpal@intel.com>
Acked-by: default avatarJani Nikula <jani.nikula@intel.com>
Signed-off-by: default avatarSuraj Kandpal <suraj.kandpal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240925034432.1777029-4-arun.r.murthy@intel.com
parent eb0c1757

drivers/gpu/drm/i915/display/intel_dp_link_training.c

+1 −1
Original line number Diff line number Diff line
@@ -1414,7 +1414,7 @@ intel_dp_128b132b_lane_eq(struct intel_dp *intel_dp, 
	}



	/* Time budget for the LANEx_EQ_DONE Sequence */

	deadline = jiffies + msecs_to_jiffies_timeout(400);

	deadline = jiffies + msecs_to_jiffies_timeout(450);



	for (try = 0; try < max_tries; try++) {

		fsleep(delay_us);