drm/i915/dp: use fsleep instead of usleep_range for LT

Sleeping for < 10us use udelay, for 10us to 20ms use usleep_range() and
for > 10ms use msleep. flseep() will call the particular API based on
the above condition. (Documentation/timers/timers-howto.rst)
Aux RD Interval value depends on the value read from the dpcd register
which is updated from the sink device, hence use flseep.

Co-developed-by: Srikanth V NagaVenkata <nagavenkata.srikanth.v@intel.com>
Signed-off-by: Arun R Murthy <arun.r.murthy@intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240925034432.1777029-2-arun.r.murthy@intel.com

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 397cc4ebae526a416fcda9c74f57a8f9f803ce3b..f41b69840ad9c9b56f5126c57753c7ae2b99b02e 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_link_training.c
@@ -898,7 +898,7 @@ 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) {
@@ -1040,7 +1040,7 @@ 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) {
@@ -1417,7 +1417,7 @@ 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);
+               fsleep(delay_us);
 
                /*
                 * The delay may get updated. The transmitter shall read the