Currently VRR timing generator is used only when VRR is enabled by
userspace. From MTL+, gradually move away from older timing
generator and use VRR timing generator for fixed refresh rate also.
In such a case, Flipline VMin and VMax all are set to the Vtotal of the
mode, which effectively makes the VRR timing generator work in
fixed refresh rate mode.
Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_vrr.c | 59 +++++++++++++++---------
1 file changed, 37 insertions(+), 22 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 025063098370..913752424adc 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -174,41 +174,56 @@ intel_vrr_compute_config(struct intel_crtc_state *crtc_state,
if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
return;
- crtc_state->vrr.in_range =
- intel_vrr_is_in_range(connector, drm_mode_vrefresh(adjusted_mode));
- if (!crtc_state->vrr.in_range)
- return;
-
if (HAS_LRR(i915))
crtc_state->update_lrr = true;
- vmin = DIV_ROUND_UP(adjusted_mode->crtc_clock * 1000,
- adjusted_mode->crtc_htotal * info->monitor_range.max_vfreq);
- vmax = adjusted_mode->crtc_clock * 1000 /
- (adjusted_mode->crtc_htotal * info->monitor_range.min_vfreq);
+ if (!crtc_state->uapi.vrr_enabled && DISPLAY_VER(i915) >= 14) {
+ /*
+ * for MTL+ if panel supports VRR and user has not set VRR,
+ * always go for fixed average Vtotal mode.
+ */
+ crtc_state->vrr.vmin = adjusted_mode->crtc_vtotal;
+ crtc_state->vrr.vmax = adjusted_mode->crtc_vtotal;
+ crtc_state->vrr.flipline = adjusted_mode->crtc_vtotal;
+ crtc_state->vrr.fixed_rr = true;
+ } else {
- vmin = max_t(int, vmin, adjusted_mode->crtc_vtotal);
- vmax = max_t(int, vmax, adjusted_mode->crtc_vtotal);
+ crtc_state->vrr.in_range =
+ intel_vrr_is_in_range(connector, drm_mode_vrefresh(adjusted_mode));
- if (vmin >= vmax)
- return;
+ if (!crtc_state->vrr.in_range)
+ return;
- /*
- * flipline determines the min vblank length the hardware will
- * generate, and flipline>=vmin+1, hence we reduce vmin by one
- * to make sure we can get the actual min vblank length.
- */
- crtc_state->vrr.vmin = vmin - 1;
- crtc_state->vrr.vmax = vmax;
- crtc_state->vrr.flipline = crtc_state->vrr.vmin + 1;
+ vmin = DIV_ROUND_UP(adjusted_mode->crtc_clock * 1000,
+ adjusted_mode->crtc_htotal * info->monitor_range.max_vfreq);
+ vmax = adjusted_mode->crtc_clock * 1000 /
+ (adjusted_mode->crtc_htotal * info->monitor_range.min_vfreq);
+
+ vmin = max_t(int, vmin, adjusted_mode->crtc_vtotal);
+ vmax = max_t(int, vmax, adjusted_mode->crtc_vtotal);
+
+ if (vmin >= vmax)
+ return;
+
+ /*
+ * flipline determines the min vblank length the hardware will
+ * generate, and flipline>=vmin+1, hence we reduce vmin by one
+ * to make sure we can get the actual min vblank length.
+ */
+ crtc_state->vrr.vmin = vmin - 1;
+ crtc_state->vrr.vmax = vmax;
+
+ crtc_state->vrr.flipline = crtc_state->vrr.vmin + 1;
+ crtc_state->vrr.fixed_rr = false;
+ }
/*
* When panel is VRR capable and userspace has
* not enabled adaptive sync mode then Fixed Average
* Vtotal mode should be enabled.
*/
- if (crtc_state->uapi.vrr_enabled) {
+ if (crtc_state->uapi.vrr_enabled || crtc_state->vrr.fixed_rr) {
crtc_state->vrr.enable = true;
crtc_state->mode_flags |= I915_MODE_FLAG_VRR;
} else if (is_cmrr_frac_required(crtc_state) && is_edp) {
--
2.40.1
