[PATCH 3/3] drm/amd/display: Don't use non-registered VUPDATE on DCE 6

[Alex Deucher]

On Mon, Aug 18, 2025 at 4:11 PM Alex Hung <alex.hung at amd.com> wrote:
>
>
>
> On 8/2/25 10:06, Timur Kristóf wrote:
> > The VUPDATE interrupt isn't registered on DCE 6, so don't try
> > to use that.
> >
> > This fixes a page flip timeout after sleep/resume on DCE 6.
> >
> > Signed-off-by: Timur Kristóf <timur.kristof at gmail.com>
> > ---
> >   .../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 22 ++++++++++++-------
> >   .../amd/display/amdgpu_dm/amdgpu_dm_crtc.c    | 16 ++++++++------
> >   2 files changed, 23 insertions(+), 15 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> > index 470f831a17f7..e8d2ba58cbfa 100644
> > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> > @@ -2981,14 +2981,20 @@ static void dm_gpureset_toggle_interrupts(struct amdgpu_device *adev,
> >                               drm_warn(adev_to_drm(adev), "Failed to %s pflip interrupts\n",
> >                                        enable ? "enable" : "disable");
> >
> > -                     if (enable) {
> > -                             if (amdgpu_dm_crtc_vrr_active(to_dm_crtc_state(acrtc->base.state)))
> > -                                     rc = amdgpu_dm_crtc_set_vupdate_irq(&acrtc->base, true);
> > -                     } else
> > -                             rc = amdgpu_dm_crtc_set_vupdate_irq(&acrtc->base, false);
> > -
> > -                     if (rc)
> > -                             drm_warn(adev_to_drm(adev), "Failed to %sable vupdate interrupt\n", enable ? "en" : "dis");
> > +                     if (dc_supports_vrr(adev->dm.dc->ctx->dce_version)) {
> > +                             if (enable) {
> > +                                     if (amdgpu_dm_crtc_vrr_active(
> > +                                                     to_dm_crtc_state(acrtc->base.state)))
> > +                                             rc = amdgpu_dm_crtc_set_vupdate_irq(
> > +                                                     &acrtc->base, true);
> > +                             } else
> > +                                     rc = amdgpu_dm_crtc_set_vupdate_irq(
> > +                                                     &acrtc->base, false);
> > +
> > +                             if (rc)
> > +                                     drm_warn(adev_to_drm(adev), "Failed to %sable vupdate interrupt\n",
> > +                                             enable ? "en" : "dis");
> > +                     }
>
> Hi Timur,
>
> There seem to be conflicts to amd-staging-drm-next. Could you please
> rebase and resend? This helps make sure new change fix the problem you
> observed.
>
> Really appreciate it. Thanks.

If it's just the first patch, you can skip that one as the conflict
solves the issue with DSC.

Alex

>
> >
> >                       irq_source = IRQ_TYPE_VBLANK + acrtc->otg_inst;
> >                       /* During gpu-reset we disable and then enable vblank irq, so
> > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
> > index 2551823382f8..f2208e4224f9 100644
> > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
> > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_crtc.c
> > @@ -298,13 +298,15 @@ static inline int amdgpu_dm_crtc_set_vblank(struct drm_crtc *crtc, bool enable)
> >
> >       irq_type = amdgpu_display_crtc_idx_to_irq_type(adev, acrtc->crtc_id);
> >
> > -     if (enable) {
> > -             /* vblank irq on -> Only need vupdate irq in vrr mode */
> > -             if (amdgpu_dm_crtc_vrr_active(acrtc_state))
> > -                     rc = amdgpu_dm_crtc_set_vupdate_irq(crtc, true);
> > -     } else {
> > -             /* vblank irq off -> vupdate irq off */
> > -             rc = amdgpu_dm_crtc_set_vupdate_irq(crtc, false);
> > +     if (dc_supports_vrr(dm->dc->ctx->dce_version)) {
> > +             if (enable) {
> > +                     /* vblank irq on -> Only need vupdate irq in vrr mode */
> > +                     if (amdgpu_dm_crtc_vrr_active(acrtc_state))
> > +                             rc = amdgpu_dm_crtc_set_vupdate_irq(crtc, true);
> > +             } else {
> > +                     /* vblank irq off -> vupdate irq off */
> > +                     rc = amdgpu_dm_crtc_set_vupdate_irq(crtc, false);
> > +             }
> >       }
> >
> >       if (rc)
>