Prefer generic poll helpers over i915 custom helpers.
The functional change is losing the exponentially growing sleep of
wait_for(), which used to be 10, 20, 40, ..., 640, and 1280 us.
Use an arbitrary constant 1 ms sleep instead. The timeouts remain, being
500 ms or 1000 ms depending on the case.
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
drivers/gpu/drm/i915/display/intel_dp.c | 21 +++++++++++----------
1 file changed, 11 insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
b/drivers/gpu/drm/i915/display/intel_dp.c
index bed7cba1ca68..65468c0126ff 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -27,6 +27,7 @@
#include <linux/export.h>
#include <linux/i2c.h>
+#include <linux/iopoll.h>
#include <linux/log2.h>
#include <linux/math.h>
#include <linux/notifier.h>
@@ -3878,10 +3879,11 @@ static int intel_dp_pcon_start_frl_training(struct
intel_dp *intel_dp)
if (ret < 0)
return ret;
/* Wait for PCON to be FRL Ready */
- wait_for(is_active = drm_dp_pcon_is_frl_ready(&intel_dp->aux) == true,
TIMEOUT_FRL_READY_MS);
-
- if (!is_active)
- return -ETIMEDOUT;
+ ret = poll_timeout_us(is_active =
drm_dp_pcon_is_frl_ready(&intel_dp->aux),
+ is_active,
+ 1000, TIMEOUT_FRL_READY_MS * 1000, false);
+ if (ret)
+ return ret;
ret = drm_dp_pcon_frl_configure_1(&intel_dp->aux, max_frl_bw,
DP_PCON_ENABLE_SEQUENTIAL_LINK);
@@ -3898,12 +3900,11 @@ static int intel_dp_pcon_start_frl_training(struct
intel_dp *intel_dp)
* Wait for FRL to be completed
* Check if the HDMI Link is up and active.
*/
- wait_for(is_active =
- intel_dp_pcon_is_frl_trained(intel_dp, max_frl_bw_mask,
&frl_trained_mask),
- TIMEOUT_HDMI_LINK_ACTIVE_MS);
-
- if (!is_active)
- return -ETIMEDOUT;
+ ret = poll_timeout_us(is_active =
intel_dp_pcon_is_frl_trained(intel_dp, max_frl_bw_mask, &frl_trained_mask),
+ is_active,
+ 1000, TIMEOUT_HDMI_LINK_ACTIVE_MS * 1000, false);
+ if (ret)
+ return ret;
frl_trained:
drm_dbg(display->drm, "FRL_TRAINED_MASK = %u\n", frl_trained_mask);
--
2.47.2
