diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2023-06-06 22:14:55 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2023-09-27 18:39:26 +0300 |
| commit | 5053121b25bf860e231784165e62714ae817e313 (patch) | |
| tree | a51506fc11e3b16ddaef83531bf84d2038ffdd8c | |
| parent | e39845d651791f190f10e63cc564c2e1a8aeb504 (diff) | |
| download | linux-5053121b25bf860e231784165e62714ae817e313.tar.xz | |
drm/i915/dsb: Add support for non-posted DSB registers writes
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 <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230606191504.18099-11-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.c | 20 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.h | 3 |
2 files changed, 23 insertions, 0 deletions
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); |