From bcd23d8ee01c2abcea782aaf40c74d54a3fdab82 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Thu, 28 Aug 2025 15:20:58 +0300 Subject: [PATCH] drm/i915/dsb: use generic poll_timeout_us() instead of wait_for() MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit 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 100 us sleep instead. The timeout remains at 1 ms. Reviewed-by: Jouni Högander Link: https://lore.kernel.org/r/979eae02af1184b3756746ace61379dd1947a79b.1756383233.git.jani.nikula@intel.com Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/display/intel_dsb.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 53d8ae3a70e9..dee44d45b668 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -4,10 +4,11 @@ * */ +#include + #include #include -#include "i915_utils.h" #include "intel_crtc.h" #include "intel_de.h" #include "intel_display_regs.h" @@ -871,8 +872,13 @@ void intel_dsb_wait(struct intel_dsb *dsb) struct intel_crtc *crtc = dsb->crtc; struct intel_display *display = to_intel_display(crtc->base.dev); enum pipe pipe = crtc->pipe; + bool is_busy; + int ret; - if (wait_for(!is_dsb_busy(display, pipe, dsb->id), 1)) { + ret = poll_timeout_us(is_busy = is_dsb_busy(display, pipe, dsb->id), + !is_busy, + 100, 1000, false); + if (ret) { u32 offset = intel_dsb_buffer_ggtt_offset(&dsb->dsb_buf); intel_de_write_fw(display, DSB_CTRL(pipe, dsb->id), -- 2.47.3