drm/i915/vrr: Disable VRR when using bigjoiner

All joined pipes share the same transcoder/timing generator.
Currently we just do the commits per-pipe, which doesn't really
work if we need to change switch between non-VRR and VRR timings
generators on the fly, or even when sending the push to the
transcoder. For now just disable VRR when bigjoiner is needed.

Cc: stable@vger.kernel.org
Tested-by: Vidya Srinivas <vidya.srinivas@intel.com>
Reviewed-by: Vandita Kulkarni <vandita.kulkarni@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240404213441.17637-6-ville.syrjala@linux.intel.com
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 856378f8b90eb491210b538155edf979657eb5f8..894ee97b3e1b0a79be169cbf02629269567d938f 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -119,6 +119,13 @@ intel_vrr_compute_config(struct intel_crtc_state *crtc_state,
        const struct drm_display_info *info = &connector->base.display_info;
        int vmin, vmax;
 
+       /*
+        * FIXME all joined pipes share the same transcoder.
+        * Need to account for that during VRR toggle/push/etc.
+        */
+       if (crtc_state->bigjoiner_pipes)
+               return;
+
        if (adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE)
                return;