diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2025-02-08 00:31:56 +0200 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2025-02-12 19:22:06 +0200 |
| commit | cdef53897cda82bc3261bf23acb0e8205ec8b19a (patch) | |
| tree | 7ca41df6dfa44b2add0a858f18a3bdeb50048524 | |
| parent | c9178dfba53ffd055c35f0daea9c35de89b45219 (diff) | |
drm/i915/dsb: Introduce intel_dsb_poll()
Add a function for emitting a DSB poll instruction. We'll allow
the caller to specify the poll parameters.
v2: s/wait/wait_us/ (Ankit)
Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250207223159.14132-6-ville.syrjala@linux.intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.c | 19 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.h | 3 |
2 files changed, 22 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; diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h b/drivers/gpu/drm/i915/display/intel_dsb.h index da6df07a3c83..e843c52bf97c 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.h +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -54,6 +54,9 @@ void intel_dsb_wait_scanline_out(struct intel_atomic_state *state, int lower, int upper); void intel_dsb_vblank_evade(struct intel_atomic_state *state, struct intel_dsb *dsb); +void intel_dsb_poll(struct intel_dsb *dsb, + i915_reg_t reg, u32 mask, u32 val, + int wait_us, int count); void intel_dsb_chain(struct intel_atomic_state *state, struct intel_dsb *dsb, struct intel_dsb *chained_dsb, |