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 500 us sleep instead. The timeout remains at
100 ms.
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
---
drivers/gpu/drm/i915/display/intel_vblank.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_vblank.c
b/drivers/gpu/drm/i915/display/intel_vblank.c
index 46d6db5fed11..c15234c1d96e 100644
--- a/drivers/gpu/drm/i915/display/intel_vblank.c
+++ b/drivers/gpu/drm/i915/display/intel_vblank.c
@@ -3,6 +3,8 @@
* Copyright © 2022-2023 Intel Corporation
*/
+#include <linux/iopoll.h>
+
#include <drm/drm_vblank.h>
#include "i915_drv.h"
@@ -493,9 +495,14 @@ static void wait_for_pipe_scanline_moving(struct
intel_crtc *crtc, bool state)
{
struct intel_display *display = to_intel_display(crtc);
enum pipe pipe = crtc->pipe;
+ bool is_moving;
+ int ret;
/* Wait for the display line to settle/start moving */
- if (wait_for(pipe_scanline_is_moving(display, pipe) == state, 100))
+ ret = poll_timeout_us(is_moving = pipe_scanline_is_moving(display,
pipe),
+ is_moving == state,
+ 500, 100 * 1000, false);
+ if (ret)
drm_err(display->drm,
"pipe %c scanline %s wait timed out\n",
pipe_name(pipe), str_on_off(state));
--
2.47.2
