[PATCH] drm/i915/dp: use fsleep instead of usleep_rage for LT

[Arun R Murthy]

Aux RD Interval value depends on the value read from the dpcd register
which is updated from the sink device use flseep thereby we adhere to
the Documentation/timers/timers-howto.rst

Aux RD interval should be read after updating the signal values and
training set.

Signed-off-by: Arun R Murthy <arun.r.murthy at intel.com>
---
 .../drm/i915/display/intel_dp_link_training.c  | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_dp_link_training.c b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
index f45797c1a205..d4f60ff13afe 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -896,7 +896,7 @@ intel_dp_link_training_clock_recovery(struct intel_dp *intel_dp,
 
 	voltage_tries = 1;
 	for (cr_tries = 0; cr_tries < max_cr_tries; ++cr_tries) {
-		usleep_range(delay_us, 2 * delay_us);
+		fsleep(delay_us);
 
 		if (drm_dp_dpcd_read_phy_link_status(&intel_dp->aux, dp_phy,
 						     link_status) < 0) {
@@ -1038,7 +1038,7 @@ intel_dp_link_training_channel_equalization(struct intel_dp *intel_dp,
 	}
 
 	for (tries = 0; tries < 5; tries++) {
-		usleep_range(delay_us, 2 * delay_us);
+		fsleep(delay_us);
 
 		if (drm_dp_dpcd_read_phy_link_status(&intel_dp->aux, dp_phy,
 						     link_status) < 0) {
@@ -1415,13 +1415,7 @@ intel_dp_128b132b_lane_eq(struct intel_dp *intel_dp,
 	deadline = jiffies + msecs_to_jiffies_timeout(400);
 
 	for (try = 0; try < max_tries; try++) {
-		usleep_range(delay_us, 2 * delay_us);
-
-		/*
-		 * The delay may get updated. The transmitter shall read the
-		 * delay before link status during link training.
-		 */
-		delay_us = drm_dp_128b132b_read_aux_rd_interval(&intel_dp->aux);
+		fsleep(delay_us);
 
 		if (drm_dp_dpcd_read_link_status(&intel_dp->aux, link_status) < 0) {
 			lt_err(intel_dp, DP_PHY_DPRX, "Failed to read link status\n");
@@ -1455,6 +1449,12 @@ intel_dp_128b132b_lane_eq(struct intel_dp *intel_dp,
 			lt_err(intel_dp, DP_PHY_DPRX, "Failed to update TX FFE settings\n");
 			return false;
 		}
+		/*
+		 * The delay may get updated. The transmitter shall read the
+		 * delay before link status during link training.
+		 */
+		delay_us = drm_dp_128b132b_read_aux_rd_interval(&intel_dp->aux);
+
 	}
 
 	if (try == max_tries) {
-- 
2.25.1