From: Ville Syrjälä <[email protected]> Writing specific transcoder registers (and as it turns out, the legacy LUT as well) via DSB needs a magic sequence to emit non-posted register writes. Add a helper for this.
Signed-off-by: Ville Syrjälä <[email protected]> --- drivers/gpu/drm/i915/display/intel_dsb.c | 20 ++++++++++++++++++++ drivers/gpu/drm/i915/display/intel_dsb.h | 3 +++ 2 files changed, 23 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 6be353fdc7fc..73d609507f24 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -261,6 +261,26 @@ void intel_dsb_noop(struct intel_dsb *dsb, int count) DSB_OPCODE_NOOP << DSB_OPCODE_SHIFT); } +void intel_dsb_nonpost_start(struct intel_dsb *dsb) +{ + struct intel_crtc *crtc = dsb->crtc; + enum pipe pipe = crtc->pipe; + + intel_dsb_reg_write_masked(dsb, DSB_CTRL(pipe, dsb->id), + DSB_NON_POSTED, DSB_NON_POSTED); + intel_dsb_noop(dsb, 4); +} + +void intel_dsb_nonpost_end(struct intel_dsb *dsb) +{ + struct intel_crtc *crtc = dsb->crtc; + enum pipe pipe = crtc->pipe; + + intel_dsb_reg_write_masked(dsb, DSB_CTRL(pipe, dsb->id), + DSB_NON_POSTED, 0); + intel_dsb_noop(dsb, 4); +} + static void intel_dsb_align_tail(struct intel_dsb *dsb) { u32 aligned_tail, tail; diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h b/drivers/gpu/drm/i915/display/intel_dsb.h index 983b0d58ad44..54e9e1dc31ee 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.h +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -22,6 +22,9 @@ void intel_dsb_reg_write(struct intel_dsb *dsb, void intel_dsb_reg_write_masked(struct intel_dsb *dsb, i915_reg_t reg, u32 mask, u32 val); void intel_dsb_noop(struct intel_dsb *dsb, int count); +void intel_dsb_nonpost_start(struct intel_dsb *dsb); +void intel_dsb_nonpost_end(struct intel_dsb *dsb); + void intel_dsb_commit(struct intel_dsb *dsb, bool wait_for_vblank); void intel_dsb_wait(struct intel_dsb *dsb); -- 2.39.3
