diff options
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.c | 73 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.h | 6 |
2 files changed, 79 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 779ba7eb8042..9fd0a40ab540 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -362,6 +362,79 @@ void intel_dsb_nonpost_end(struct intel_dsb *dsb) intel_dsb_noop(dsb, 4); } +static void intel_dsb_emit_wait_dsl(struct intel_dsb *dsb, + u32 opcode, int lower, int upper) +{ + u64 window = ((u64)upper << DSB_SCANLINE_UPPER_SHIFT) | + ((u64)lower << DSB_SCANLINE_LOWER_SHIFT); + + intel_dsb_emit(dsb, lower_32_bits(window), + (opcode << DSB_OPCODE_SHIFT) | + upper_32_bits(window)); +} + +static void intel_dsb_wait_dsl(struct intel_atomic_state *state, + struct intel_dsb *dsb, + int lower_in, int upper_in, + int lower_out, int upper_out) +{ + struct intel_crtc *crtc = dsb->crtc; + + lower_in = dsb_scanline_to_hw(state, crtc, lower_in); + upper_in = dsb_scanline_to_hw(state, crtc, upper_in); + + lower_out = dsb_scanline_to_hw(state, crtc, lower_out); + upper_out = dsb_scanline_to_hw(state, crtc, upper_out); + + if (upper_in >= lower_in) + intel_dsb_emit_wait_dsl(dsb, DSB_OPCODE_WAIT_DSL_IN, + lower_in, upper_in); + else if (upper_out >= lower_out) + intel_dsb_emit_wait_dsl(dsb, DSB_OPCODE_WAIT_DSL_OUT, + lower_out, upper_out); + else + drm_WARN_ON(crtc->base.dev, 1); /* assert_dsl_ok() should have caught it already */ +} + +static void assert_dsl_ok(struct intel_atomic_state *state, + struct intel_dsb *dsb, + int start, int end) +{ + struct intel_crtc *crtc = dsb->crtc; + int vtotal = dsb_vtotal(state, crtc); + + /* + * Waiting for the entire frame doesn't make sense, + * (IN==don't wait, OUT=wait forever). + */ + drm_WARN(crtc->base.dev, (end - start + vtotal) % vtotal == vtotal - 1, + "[CRTC:%d:%s] DSB %d bad scanline window wait: %d-%d (vt=%d)\n", + crtc->base.base.id, crtc->base.name, dsb->id, + start, end, vtotal); +} + +void intel_dsb_wait_scanline_in(struct intel_atomic_state *state, + struct intel_dsb *dsb, + int start, int end) +{ + assert_dsl_ok(state, dsb, start, end); + + intel_dsb_wait_dsl(state, dsb, + start, end, + end + 1, start - 1); +} + +void intel_dsb_wait_scanline_out(struct intel_atomic_state *state, + struct intel_dsb *dsb, + int start, int end) +{ + assert_dsl_ok(state, dsb, start, end); + + intel_dsb_wait_dsl(state, dsb, + end + 1, start - 1, + start, end); +} + 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 84fc2f8434d1..d0737cefb393 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.h +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -39,6 +39,12 @@ void intel_dsb_reg_write_masked(struct intel_dsb *dsb, 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_wait_scanline_in(struct intel_atomic_state *state, + struct intel_dsb *dsb, + int lower, int upper); +void intel_dsb_wait_scanline_out(struct intel_atomic_state *state, + struct intel_dsb *dsb, + int lower, int upper); void intel_dsb_commit(struct intel_dsb *dsb, bool wait_for_vblank); |