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 <jouni.hogander@intel.com>
Reviewed-by: Gustavo Sousa <gustavo.sousa@intel.com>
Link: https://lore.kernel.org/r/20250722125618.1842615-3-jouni.hogander@intel.com
(cherry picked from commit d487ed7e2b4ab3126239ab93324405eb1e45ccf5)
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>

diff --git a/drivers/gpu/drm/i915/display/intel_cx0_phy.c b/drivers/gpu/drm/i915/display/intel_cx0_phy.c
index 2b0305bb04cd2fd92ae26bf74c3b539fa47557d6..2993dabdbee6edfd36e3c91fa0b7d7c2a8c83556 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_cx0_phy.c
+++ b/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;