efi_selftest: test for graphics output protocol

Supply a test for the graphics output protocol.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

lib/efi_selftest/Makefile

@@ -15,6 +15,8 @@ CFLAGS_efi_selftest_events.o := $(CFLAGS_EFI)
 CFLAGS_REMOVE_efi_selftest_events.o := $(CFLAGS_NON_EFI)
 CFLAGS_efi_selftest_exitbootservices.o := $(CFLAGS_EFI)
 CFLAGS_REMOVE_efi_selftest_exitbootservices.o := $(CFLAGS_NON_EFI)
+CFLAGS_efi_selftest_gop.o := $(CFLAGS_EFI)
+CFLAGS_REMOVE_efi_selftest_gop.o := $(CFLAGS_NON_EFI)
 CFLAGS_efi_selftest_manageprotocols.o := $(CFLAGS_EFI)
 CFLAGS_REMOVE_efi_selftest_manageprotocols.o := $(CFLAGS_NON_EFI)
 CFLAGS_efi_selftest_snp.o := $(CFLAGS_EFI)
@@ -33,6 +35,7 @@ efi_selftest.o \
 efi_selftest_console.o \
 efi_selftest_events.o \
 efi_selftest_exitbootservices.o \
+efi_selftest_gop.o \
 efi_selftest_manageprotocols.o \
 efi_selftest_snp.o \
 efi_selftest_textoutput.o \

lib/efi_selftest/efi_selftest_gop.c

@@ -0,0 +1,95 @@
+/*
+ * efi_selftest_gop
+ *
+ * Copyright (c) 2017 Heinrich Schuchardt <xypron.glpk@gmx.de>
+ *
+ * SPDX-License-Identifier:     GPL-2.0+
+ *
+ * Test the graphical output protocol.
+ */
+
+#include <efi_selftest.h>
+
+static struct efi_boot_services *boottime;
+static efi_guid_t efi_gop_guid = EFI_GOP_GUID;
+static struct efi_gop *gop;
+
+/*
+ * Setup unit test.
+ *
+ * @handle:	handle of the loaded image
+ * @systable:	system table
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int setup(const efi_handle_t handle,
+		 const struct efi_system_table *systable)
+{
+	efi_status_t ret;
+
+	boottime = systable->boottime;
+
+	ret = boottime->locate_protocol(&efi_gop_guid, NULL, (void **)&gop);
+	if (ret != EFI_SUCCESS) {
+		gop = NULL;
+		efi_st_printf("Graphical output protocol is not available.\n");
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+/*
+ * Tear down unit test.
+ *
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int teardown(void)
+{
+	return EFI_ST_SUCCESS;
+}
+
+/*
+ * Execute unit test.
+ *
+ * @return:	EFI_ST_SUCCESS for success
+ */
+static int execute(void)
+{
+	efi_status_t ret;
+	u32 i, max_mode;
+	efi_uintn_t size;
+	struct efi_gop_mode_info *info;
+
+	if (!gop)
+		return EFI_ST_SUCCESS;
+
+	if (!gop->mode) {
+		efi_st_error("EFI_GRAPHICS_OUTPUT_PROTOCOL_MODE missing\n");
+		return EFI_ST_FAILURE;
+	}
+	max_mode = gop->mode->max_mode;
+	if (!max_mode) {
+		efi_st_error("No graphical mode available\n");
+		return EFI_ST_FAILURE;
+	}
+	efi_st_printf("Number of available modes: %u\n", max_mode);
+
+	for (i = 0; i < max_mode; ++i) {
+		ret = gop->query_mode(gop, i, &size, &info);
+		if (ret != EFI_SUCCESS) {
+			efi_st_printf("Could not query mode %u\n", i);
+			return EFI_ST_FAILURE;
+		}
+		efi_st_printf("Mode %u: %u x %u\n",
+			      i, info->width, info->height);
+	}
+
+	return EFI_ST_SUCCESS;
+}
+
+EFI_UNIT_TEST(gop) = {
+	.name = "graphical output",
+	.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
+	.setup = setup,
+	.execute = execute,
+	.teardown = teardown,
+};