drm/i915/xe2lpd: update the scaler feature capability

Update the number of scalers per pipe based on the display
capabilities reported.

v1: define the field values instead of the magic number (JaniN)

Bspec: 71161
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20231001113155.80659-4-vinod.govindapillai@intel.comSigned-off-by: Jouni Högander <jouni.hogander@intel.com>

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

@@ -1078,6 +1078,13 @@ static void __intel_display_device_info_runtime_init(struct drm_i915_private *i9
 		if (REG_FIELD_GET(XE2LPD_DE_CAP_DSC_MASK, cap) ==
 		    XE2LPD_DE_CAP_DSC_REMOVED)
 			display_runtime->has_dsc = 0;
+
+		if (REG_FIELD_GET(XE2LPD_DE_CAP_SCALER_MASK, cap) ==
+		    XE2LPD_DE_CAP_SCALER_SINGLE) {
+			for_each_pipe(i915, pipe)
+				if (display_runtime->num_scalers[pipe])
+					display_runtime->num_scalers[pipe] = 1;
+		}
 	}
 
 	return;