diff options
| author | Jani Nikula <jani.nikula@intel.com> | 2025-08-28 15:20:56 +0300 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2025-09-04 14:02:59 +0300 |
| commit | 46013820f40220ca4ddcf4892401affe41d69747 (patch) | |
| tree | 85bffc2f875fe48a368f2238db19b3e8c20e0ee6 | |
| parent | 476721f28ee8f97abc89103c89279766167ef95a (diff) | |
drm/i915/vblank: use generic poll_timeout_us() instead of wait_for()
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.
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://lore.kernel.org/r/162dff5862d3213304491a6d2eb31a57346b523e.1756383233.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_vblank.c | 9 |
1 files changed, 8 insertions, 1 deletions
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)); |