diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-09-30 20:04:08 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2024-10-04 00:33:10 +0300 |
| commit | de968532fd562af00cd630b5bb7f42e36dbbe755 (patch) | |
| tree | 3f35a539a06f625e1c955c28b1ef1bf7f1e2d43f /drivers/gpu/drm/i915/display/intel_dsb.h | |
| parent | 63b41d207dc12ee2632fcad6229bfca2c54da5d9 (diff) | |
| download | lwn-de968532fd562af00cd630b5bb7f42e36dbbe755.tar.gz lwn-de968532fd562af00cd630b5bb7f42e36dbbe755.zip | |
drm/i915/dsb: Introduce intel_dsb_wait_usec()
Add a function to emit the DSB "wait usecs" instruction.
This is just a usleep() for the DSB.
As a lower bound it seems pretty accurate, but the upper bound
seemed oddly relaxed (ie. sometimes I've seen waits that are
quite a bit longer than specified, not sure why).
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240930170415.23841-7-ville.syrjala@linux.intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dsb.h')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dsb.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dsb.h b/drivers/gpu/drm/i915/display/intel_dsb.h index cce5cb1c6071..882088f55580 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.h +++ b/drivers/gpu/drm/i915/display/intel_dsb.h @@ -40,6 +40,7 @@ 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_interrupt(struct intel_dsb *dsb); +void intel_dsb_wait_usec(struct intel_dsb *dsb, int count); void intel_dsb_wait_scanline_in(struct intel_atomic_state *state, struct intel_dsb *dsb, int lower, int upper); |