For LNL+ the condition that flipline > vmin is no more required.
Only for platforms before LNL, set the vmin - 1 to have flipline > vmin.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_vrr.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 83b11f3d5eb5..0c0e78622073 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -210,12 +210,18 @@ int intel_vrr_compute_vmax(struct intel_connector *connector,
static
void intel_vrr_prepare_vrr_timings(struct intel_crtc_state *crtc_state, int vmin, int vmax)
{
+ struct intel_display *display = to_intel_display(crtc_state);
+
/*
* flipline determines the min vblank length the hardware will
- * generate, and flipline>=vmin+1, hence we reduce vmin by one
+ * generate. For pre LNL flipline>=vmin+1, hence we reduce vmin by one
* to make sure we can get the actual min vblank length.
+ * For LNL+ there is no such restrictions.
*/
- crtc_state->vrr.vmin = vmin - 1;
+ if (DISPLAY_VER(display) >= 20)
+ crtc_state->vrr.vmin = vmin;
+ else
+ crtc_state->vrr.vmin = vmin - 1;
crtc_state->vrr.vmax = vmax;
crtc_state->vrr.flipline = crtc_state->vrr.vmin + 1;
}
--
2.45.2
