diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.c | 31 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.h | 2 |
2 files changed, 33 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 8514d7219140..9ed7b03c1e33 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -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, diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h b/drivers/gpu/drm/i915/display/intel_dsb.h index ff3b89dfffc1..cce5cb1c6071 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.h +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -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, |