drm/i915/dsb: Account for VRR properly in DSB scanline stuff

When determining various scanlines for DSB use we should take into
account whether VRR is active at the time when the DSB uses said
scanline information. For now all DSB scanline usage occurs prior
to the actual commit, so we only need to care about the state of
VRR at that time.

I've decided to move intel_crtc_scanline_to_hw() in its entirety
to the DSB code as it will also need to know the actual state
of VRR in order to do its job 100% correctly.

TODO: figure out how much of this could be moved to some
      more generic place and perhaps be shared with the CPU
      vblank evasion code/etc...

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240624191032.27333-8-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 9049b9a1209d..9ad0cb3fab29 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -1032,8 +1032,8 @@ static bool intel_crtc_vrr_enabling(struct intel_atomic_state *state,
 		  vrr_params_changed(old_crtc_state, new_crtc_state)));
 }
 
-static bool intel_crtc_vrr_disabling(struct intel_atomic_state *state,
-				     struct intel_crtc *crtc)
+bool intel_crtc_vrr_disabling(struct intel_atomic_state *state,
+			      struct intel_crtc *crtc)
 {
 	const struct intel_crtc_state *old_crtc_state =
 		intel_atomic_get_old_crtc_state(state, crtc);