drm/i915/display: Avoid unnecessarily calling intel_cx0_get_owned_lane_mask

Currently we are always calling intel_cx0_get_owned_lane_mask when
intel_lnl_mac_transmit_lfps is called. Avoid this in cases where it's not
needed.

Signed-off-by: Jouni Högander <[email protected]>
Reviewed-by: Gustavo Sousa <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
(cherry picked from commit d487ed7)
Signed-off-by: Tvrtko Ursulin <[email protected]>

Author: hogander

drivers/gpu/drm/i915/display/intel_cx0_phy.c

@@ -3239,13 +3239,14 @@ void intel_lnl_mac_transmit_lfps(struct intel_encoder *encoder,
 				 const struct intel_crtc_state *crtc_state)
 {
 	struct intel_display *display = to_intel_display(encoder);
-	u8 owned_lane_mask = intel_cx0_get_owned_lane_mask(encoder);
 	int i;
+	u8 owned_lane_mask;
 
 	if (DISPLAY_VER(display) < 20 ||
 	    !intel_alpm_is_alpm_aux_less(enc_to_intel_dp(encoder), crtc_state))
 		return;
 
+	owned_lane_mask = intel_cx0_get_owned_lane_mask(encoder);
 	for (i = 0; i < 4; i++) {
 		int tx = i % 2 + 1;
 		u8 lane_mask = i < 2 ? INTEL_CX0_LANE0 : INTEL_CX0_LANE1;