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drm/i915/dsb: use generic poll_timeout_us() instead of wait_for()

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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 <jouni.hogander@intel.com>
Link: https://lore.kernel.org/r/979eae02af1184b3756746ace61379dd1947a79b.1756383233.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jani Nikula 2025-08-28 15:20:58 +03:00
parent 7987b76433
commit bcd23d8ee0
1 changed files with 8 additions and 2 deletions
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10
drivers/gpu/drm/i915/display/intel_dsb.c
View File

@ -4,10 +4,11 @@
*
*/
#include <linux/iopoll.h>
#include <drm/drm_print.h>
#include <drm/drm_vblank.h>
#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),