[PATCH 14/15] drm/i915/vrr: Allow fixed_rr with pipe joiner

[Ankit Nautiyal]

VRR with joiner is currently disabled as it still needs some work to
correctly sequence the primary and secondary transcoders. However, we can
still use VRR Timing generator in fixed refresh rate for joiner and since
it just need to program vrr timings once and does not involve changing
timings on the fly. We still need to skip the VRR and LRR for joiner.

To achieve this set vrr.in_range to 0 for joiner case, so that we do not
try VRR and LRR for the joiner case.

v2: Avoid checks for secondary pipes, where not required. (Ville)
v3: Remove a redundant check and reset vrr.in_range to false. (Ville)

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal at intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_vrr.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c
index 3fb977a4f095..c1cdd1918c19 100644
--- a/drivers/gpu/drm/i915/display/intel_vrr.c
+++ b/drivers/gpu/drm/i915/display/intel_vrr.c
@@ -353,19 +353,23 @@ intel_vrr_compute_config(struct intel_crtc_state *crtc_state,
 	if (!HAS_VRR(display))
 		return;
 
-	/*
-	 * FIXME all joined pipes share the same transcoder.
-	 * Need to account for that during VRR toggle/push/etc.
-	 */
-	if (crtc_state->joiner_pipes)
-		return;
-
 	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));
 
+	/*
+	 * Allow fixed refresh rate with VRR Timing Generator.
+	 * For now set the vrr.in_range to 0, to allow fixed_rr but skip actual
+	 * VRR and LRR.
+	 * #TODO For actual VRR with joiner, we need to figure out how to
+	 * correctly sequence transcoder level stuff vs. pipe level stuff
+	 * in the commit.
+	 */
+	if (crtc_state->joiner_pipes)
+		crtc_state->vrr.in_range = false;
+
 	vmin = intel_vrr_compute_vmin(crtc_state);
 
 	if (crtc_state->vrr.in_range) {
-- 
2.45.2