drm/i915/psr: Set DP_PSR_SU_REGION_SCANLINE_CAPTURE bit when needed

Setting DP_PSR_SU_REGION_SCANLINE_CAPTURE (Selective Update Region Scan
Line Capture Indication in spec) bit was dropped when psr_enable_sink was
split to _psr_enable_sink and _panel_replay_enable_sink. Add setting it
back.

Fixes: 32f0045f ("drm/i915/psr: Split enabling sink for PSR and Panel Replay")
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240620103312.903977-1-jouni.hogander@intel.com

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

@@ -732,6 +732,9 @@ static void _psr_enable_sink(struct intel_dp *intel_dp,
 			val |= DP_PSR_CRC_VERIFICATION;
 	}
 
+	if (crtc_state->req_psr2_sdp_prior_scanline)
+		val |= DP_PSR_SU_REGION_SCANLINE_CAPTURE;
+
 	if (crtc_state->enable_psr2_su_region_et)
 		val |= DP_PANEL_REPLAY_ENABLE_SU_REGION_ET;