diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dsb.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 01e3bd385cac..aba57ddfbb92 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -459,6 +459,25 @@ void intel_dsb_wait_scanline_out(struct intel_atomic_state *state, start, end); } +void intel_dsb_poll(struct intel_dsb *dsb, + i915_reg_t reg, u32 mask, u32 val, + int wait_us, int count) +{ + struct intel_crtc *crtc = dsb->crtc; + enum pipe pipe = crtc->pipe; + + intel_dsb_reg_write(dsb, DSB_POLLMASK(pipe, dsb->id), mask); + intel_dsb_reg_write(dsb, DSB_POLLFUNC(pipe, dsb->id), + DSB_POLL_ENABLE | + DSB_POLL_WAIT(wait_us) | DSB_POLL_COUNT(count)); + + intel_dsb_noop(dsb, 5); + + intel_dsb_emit(dsb, val, + (DSB_OPCODE_POLL << DSB_OPCODE_SHIFT) | + i915_mmio_reg_offset(reg)); +} + static void intel_dsb_align_tail(struct intel_dsb *dsb) { u32 aligned_tail, tail; |