display: Add workaround for Sequoia DCP handoff bug

Signed-off-by: Hector Martin <[email protected]>

Author: marcan

src/display.c

@@ -8,6 +8,7 @@
 #include "dcp.h"
 #include "dcp_iboot.h"
 #include "fb.h"
+#include "firmware.h"
 #include "memory.h"
 #include "soc.h"
 #include "string.h"
@@ -31,6 +32,7 @@ static u64 fb_dva;
 static u64 fb_size;
 bool display_is_external;
 bool display_is_dptx;
+bool display_needs_power_cycle;
 
 static const display_config_t display_config_m1 = {
     .dcp = "/arm-io/dcp",
@@ -401,6 +403,11 @@ int display_configure(const char *config)
     }
 
     if (!display_is_external) {
+        // Sequoia bug workaround: Force power cycle
+        if (display_needs_power_cycle) {
+            if ((ret = dcp_ib_set_power(iboot, false)) < 0)
+                printf("display: failed to set power off (continuing anyway)\n");
+        }
         // Sonoma bug workaround: Power on internal panel early
         if ((ret = dcp_ib_set_power(iboot, true)) < 0)
             printf("display: failed to set power on (continuing anyway)\n");
@@ -615,6 +622,12 @@ int display_init(void)
                "reconfiguring\n");
         fb_clear_direct(); // Old m1n1 stage1 ends up with an ugly logo situation, clear it.
         return display_configure(NULL);
+#ifndef CHAINLOADING
+    } else if ((chip_id == T8103 || chip_id == T8112) && firmware_sfw_in_range(V15_0B1, FW_MAX)) {
+        printf("display: Internal display on t8103 or t8112 with Sequoia SFW, power cycling\n");
+        display_needs_power_cycle = true;
+        return display_configure(NULL);
+#endif
     } else {
         printf("display: Display is already initialized (%ldx%ld)\n", cur_boot_args.video.width,
                cur_boot_args.video.height);