diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dsb.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 9fd0a40ab540..642c280d4f29 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -500,6 +500,48 @@ static u32 dsb_error_int_en(struct intel_display *display) return errors; } +static void _intel_dsb_chain(struct intel_atomic_state *state, + struct intel_dsb *dsb, + struct intel_dsb *chained_dsb, + u32 ctrl) +{ + struct intel_display *display = to_intel_display(state->base.dev); + struct intel_crtc *crtc = dsb->crtc; + enum pipe pipe = crtc->pipe; + u32 tail; + + if (drm_WARN_ON(display->drm, dsb->id == chained_dsb->id)) + return; + + tail = chained_dsb->free_pos * 4; + if (drm_WARN_ON(display->drm, !IS_ALIGNED(tail, CACHELINE_BYTES))) + return; + + intel_dsb_reg_write(dsb, DSB_CTRL(pipe, chained_dsb->id), + ctrl | DSB_ENABLE); + + intel_dsb_reg_write(dsb, DSB_CHICKEN(pipe, chained_dsb->id), + dsb_chicken(state, crtc)); + + intel_dsb_reg_write(dsb, DSB_INTERRUPT(pipe, chained_dsb->id), + dsb_error_int_status(display) | DSB_PROG_INT_STATUS | + dsb_error_int_en(display)); + + intel_dsb_reg_write(dsb, DSB_HEAD(pipe, chained_dsb->id), + intel_dsb_buffer_ggtt_offset(&chained_dsb->dsb_buf)); + + intel_dsb_reg_write(dsb, DSB_TAIL(pipe, chained_dsb->id), + intel_dsb_buffer_ggtt_offset(&chained_dsb->dsb_buf) + tail); +} + +void intel_dsb_chain(struct intel_atomic_state *state, + struct intel_dsb *dsb, + struct intel_dsb *chained_dsb) +{ + _intel_dsb_chain(state, dsb, chained_dsb, + 0); +} + static void _intel_dsb_commit(struct intel_dsb *dsb, u32 ctrl, int hw_dewake_scanline) { |