On Wed, 03 Jan 2024, José Roberto de Souza <jose.souza@xxxxxxxxx> wrote: > Often getting DBS overflows when starting Xorg or Wayland compositor > when running Xe KMD. > Issue was reported but nothing was done, so disabling DSB as whole > until properly fixed. Please just incorporate this into the HAS_DSB() check, and don't litter the source with ifdefs. Thanks, Jani. > > Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/989 > Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1031 > Link: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1072 > Cc: Animesh Manna <animesh.manna@xxxxxxxxx> > Cc: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > Signed-off-by: José Roberto de Souza <jose.souza@xxxxxxxxx> > --- > drivers/gpu/drm/i915/display/intel_dsb.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c > index 482c28b5c2de5..bc11c447afe03 100644 > --- a/drivers/gpu/drm/i915/display/intel_dsb.c > +++ b/drivers/gpu/drm/i915/display/intel_dsb.c > @@ -321,6 +321,7 @@ void intel_dsb_finish(struct intel_dsb *dsb) > intel_dsb_buffer_flush_map(&dsb->dsb_buf); > } > > +#ifdef I915 > static int intel_dsb_dewake_scanline(const struct intel_crtc_state *crtc_state) > { > struct drm_i915_private *i915 = to_i915(crtc_state->uapi.crtc->dev); > @@ -339,6 +340,7 @@ static int intel_dsb_dewake_scanline(const struct intel_crtc_state *crtc_state) > > return max(0, vblank_start - intel_usecs_to_scanlines(adjusted_mode, latency)); > } > +#endif > > static void _intel_dsb_commit(struct intel_dsb *dsb, u32 ctrl, > int dewake_scanline) > @@ -444,6 +446,8 @@ void intel_dsb_wait(struct intel_dsb *dsb) > struct intel_dsb *intel_dsb_prepare(const struct intel_crtc_state *crtc_state, > unsigned int max_cmds) > { > + /* TODO: DSB is broken in Xe KMD, so disabling it until fixed */ > +#ifdef I915 > struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); > struct drm_i915_private *i915 = to_i915(crtc->base.dev); > intel_wakeref_t wakeref; > @@ -484,6 +488,7 @@ struct intel_dsb *intel_dsb_prepare(const struct intel_crtc_state *crtc_state, > "[CRTC:%d:%s] DSB %d queue setup failed, will fallback to MMIO for display HW programming\n", > crtc->base.base.id, crtc->base.name, DSB1); > > +#endif > return NULL; > } -- Jani Nikula, Intel
