diff options
| author | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2023-06-06 22:15:01 +0300 |
|---|---|---|
| committer | Ville Syrjälä <ville.syrjala@linux.intel.com> | 2023-09-27 18:47:08 +0300 |
| commit | 77d8285683d81321cac88a4d6cdb08f1b205f432 (patch) | |
| tree | 755b919279b6b895f4a97a09076c43b087cbb977 | |
| parent | b4283282c9538958f7ee23c5af3bab3e4e94d553 (diff) | |
| download | linux-77d8285683d81321cac88a4d6cdb08f1b205f432.tar.xz | |
drm/i915: Introduce intel_crtc_scanline_to_hw()
Add a helper to convert our idea of a scanline to the hw's idea
of the same scanline (ie. apply crtc->scanline_offset in reverse).
We'll need this to tell the DSB do stuff on a specific scanline.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230606191504.18099-17-ville.syrjala@linux.intel.com
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_vblank.c | 14 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_vblank.h | 1 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_vblank.c b/drivers/gpu/drm/i915/display/intel_vblank.c index f5659ebd08eb..2cec2abf9746 100644 --- a/drivers/gpu/drm/i915/display/intel_vblank.c +++ b/drivers/gpu/drm/i915/display/intel_vblank.c @@ -251,6 +251,20 @@ static int __intel_get_crtc_scanline(struct intel_crtc *crtc) return (position + crtc->scanline_offset) % vtotal; } +int intel_crtc_scanline_to_hw(struct intel_crtc *crtc, int scanline) +{ + const struct drm_vblank_crtc *vblank = + &crtc->base.dev->vblank[drm_crtc_index(&crtc->base)]; + const struct drm_display_mode *mode = &vblank->hwmode; + int vtotal; + + vtotal = mode->crtc_vtotal; + if (mode->flags & DRM_MODE_FLAG_INTERLACE) + vtotal /= 2; + + return (scanline + vtotal - crtc->scanline_offset) % vtotal; +} + static bool i915_get_crtc_scanoutpos(struct drm_crtc *_crtc, bool in_vblank_irq, int *vpos, int *hpos, diff --git a/drivers/gpu/drm/i915/display/intel_vblank.h b/drivers/gpu/drm/i915/display/intel_vblank.h index 08e706b29149..17636f140c71 100644 --- a/drivers/gpu/drm/i915/display/intel_vblank.h +++ b/drivers/gpu/drm/i915/display/intel_vblank.h @@ -22,5 +22,6 @@ void intel_wait_for_pipe_scanline_stopped(struct intel_crtc *crtc); void intel_wait_for_pipe_scanline_moving(struct intel_crtc *crtc); void intel_crtc_update_active_timings(const struct intel_crtc_state *crtc_state, bool vrr_enable); +int intel_crtc_scanline_to_hw(struct intel_crtc *crtc, int scanline); #endif /* __INTEL_VBLANK_H__ */ |