kboot: dcpext: Enable dcpext* on t600x only with firmware 13.5

Only the HDMI port on 14 and 16 inch Macbook Pros needs dcpext and the dptxport endpoint implemention in the DCP driver supports only the 13.5 firmware. Postpone this for after the fedora release. Signed-off-by: Janne Grunau <[email protected]>
AsahiLinux · Nov 6, 2023 · e090641 · e090641
1 parent 012c89a
commit e090641
Showing 1 changed file with 9 additions and 7 deletions.
diff --git a/src/kboot.c b/src/kboot.c
@@ -1794,13 +1794,15 @@ static int dt_set_display(void)
         if (ret)
             return ret;
 
-        for (int n = 0; n < MAX_DCPEXT && ret == 0; n++) {
-            char dcpext_alias[16];
-
-            snprintf(dcpext_alias, sizeof(dcpext_alias), "dcpext%d", n);
-            ret = dt_carveout_reserved_regions(dcpext_alias, NULL, NULL,
-                                               dcpext_reserved_regions_t600x[n],
-                                               ARRAY_SIZE(dcpext_reserved_regions_t600x[n]));
+        if (os_firmware.version >= V13_5) {
+            for (int n = 0; n < MAX_DCPEXT && ret == 0; n++) {
+                char dcpext_alias[16];
+
+                snprintf(dcpext_alias, sizeof(dcpext_alias), "dcpext%d", n);
+                ret = dt_carveout_reserved_regions(dcpext_alias, NULL, NULL,
+                                                   dcpext_reserved_regions_t600x[n],
+                                                   ARRAY_SIZE(dcpext_reserved_regions_t600x[n]));
+            }
         }
     } else if (!fdt_node_check_compatible(dt, 0, "apple,t6020") ||
                !fdt_node_check_compatible(dt, 0, "apple,t6021")) {