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drm/vmwgfx: Determine lock-waiting timeout from vblank state

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Use the calculated duration of a frame as stored in the vblank state
for the lock-waiting timeout. Decouples the waiting from the details
of the vblank implementation. Both values should be equal.

This will be helpful for replacing vmwgfx's vblank timer with DRM's
common implementation.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Zack Rusin <zack.rusin@broadcom.com>
Link: https://patch.msgid.link/20260427150250.699768-2-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2026-04-27 17:00:38 +02:00
parent c0d650bd0e
commit 83ae9a231d
1 changed files with 6 additions and 2 deletions
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8
drivers/gpu/drm/vmwgfx/vmwgfx_vkms.c
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@ -516,9 +516,13 @@ vmw_vkms_set_crc_surface(struct drm_crtc *crtc,
static inline u64
vmw_vkms_lock_max_wait_ns(struct vmw_display_unit *du)
{
s64 nsecs = ktime_to_ns(du->vkms.period_ns);
struct drm_crtc *crtc = &du->crtc;
struct drm_vblank_crtc *vblank = drm_crtc_vblank_crtc(crtc);
return (nsecs > 0) ? nsecs : 16666666;
if (!vblank || !vblank->framedur_ns)
return NSEC_PER_SEC / 60; /* disabled; assume 60 Hz */
return vblank->framedur_ns;
}
/**