psp_verstage: report developer mode to PSP

Add platform_report_mode function which report current developer mode
status to the PSP. L1 widevine app in the PSP will use this information
to select key box.

BUG=b:211058864
TEST=build and boot guybrush
TEST=build picasso chrome os boards

Signed-off-by: Kangheui Won <khwon@chromium.org>
Change-Id: I04b5fcfa338b485b36f1b946203f32823385c0b1
Reviewed-on: https://review.coreboot.org/c/coreboot/+/61369
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jason Glenesk <jason.glenesk@gmail.com>
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Reviewed-by: Karthik Ramasubramanian <kramasub@google.com>

src/soc/amd/cezanne/psp_verstage/chipset.c

@@ -33,6 +33,14 @@ int platform_set_sha_op(enum vb2_hash_algorithm hash_alg,
 	return 0;
 }
 
+void platform_report_mode(int developer_mode_enabled)
+{
+	if (developer_mode_enabled)
+		svc_set_platform_boot_mode(CHROME_BOOK_BOOT_MODE_DEVELOPER);
+	else
+		svc_set_platform_boot_mode(CHROME_BOOK_BOOT_MODE_PRODUCTION);
+}
+
 
 /* Functions below are stub functions for not-yet-implemented PSP features.
  * These functions should be replaced with proper implementations later.

src/soc/amd/common/psp_verstage/include/psp_verstage.h

@@ -65,5 +65,6 @@ uint32_t save_uapp_data(void *address, uint32_t size);
 uint32_t get_bios_dir_addr(struct embedded_firmware *ef_table);
 int platform_set_sha_op(enum vb2_hash_algorithm hash_alg,
 			struct sha_generic_data *sha_op);
+void platform_report_mode(int developer_mode_enabled);
 
 #endif /* PSP_VERSTAGE_H */

src/soc/amd/common/psp_verstage/psp_verstage.c

@@ -314,6 +314,8 @@ void Main(void)
 	if (retval)
 		reboot_into_recovery(ctx, retval);
 
+	platform_report_mode(vboot_developer_mode_enabled());
+
 	post_code(POSTCODE_UPDATE_BOOT_REGION);
 
 	/*

src/soc/amd/picasso/psp_verstage/chipset.c

@@ -38,3 +38,9 @@ int platform_set_sha_op(enum vb2_hash_algorithm hash_alg,
 	}
 	return 0;
 }
+
+void platform_report_mode(int developer_mode_enabled)
+{
+	/* Picasso PSP doesn't support this */
+	(void)developer_mode_enabled;
+}