@@ -128,6 +128,12 @@ pre_commit_crtc_state(struct intel_atomic_state *state,
return old_crtc_state;
}
+static int dsb_vblank_delay(const struct intel_crtc_state *crtc_state)
+{
+ return intel_mode_vblank_start(&crtc_state->hw.adjusted_mode) -
+ intel_mode_vdisplay(&crtc_state->hw.adjusted_mode);
+}
+
static int dsb_vtotal(struct intel_atomic_state *state,
struct intel_crtc *crtc)
{
@@ -527,6 +533,31 @@ static u32 dsb_error_int_en(struct intel_display *display)
return errors;
}
+void intel_dsb_vblank_evade(struct intel_atomic_state *state,
+ struct intel_dsb *dsb)
+{
+ struct intel_crtc *crtc = dsb->crtc;
+ const struct intel_crtc_state *crtc_state = pre_commit_crtc_state(state, crtc);
+ /* FIXME calibrate sensibly */
+ int latency = intel_usecs_to_scanlines(&crtc_state->hw.adjusted_mode, 20);
+ int vblank_delay = dsb_vblank_delay(crtc_state);
+ int start, end;
+
+ if (pre_commit_is_vrr_active(state, crtc)) {
+ end = intel_vrr_vmin_vblank_start(crtc_state);
+ start = end - vblank_delay - latency;
+ intel_dsb_wait_scanline_out(state, dsb, start, end);
+
+ end = intel_vrr_vmax_vblank_start(crtc_state);
+ start = end - vblank_delay - latency;
+ intel_dsb_wait_scanline_out(state, dsb, start, end);
+ } else {
+ end = intel_mode_vblank_start(&crtc_state->hw.adjusted_mode);
+ start = end - vblank_delay - latency;
+ intel_dsb_wait_scanline_out(state, dsb, start, end);
+ }
+}
+
static void _intel_dsb_chain(struct intel_atomic_state *state,
struct intel_dsb *dsb,
struct intel_dsb *chained_dsb,
@@ -46,6 +46,8 @@ void intel_dsb_wait_scanline_in(struct intel_atomic_state *state,
void intel_dsb_wait_scanline_out(struct intel_atomic_state *state,
struct intel_dsb *dsb,
int lower, int upper);
+void intel_dsb_vblank_evade(struct intel_atomic_state *state,
+ struct intel_dsb *dsb);
void intel_dsb_chain(struct intel_atomic_state *state,
struct intel_dsb *dsb,
struct intel_dsb *chained_dsb,