gnu-efi/gnu-efi-3.0q-handle-uninitialized-gop.patch

From 0f8b3ac2ec984de7f3437fe6a3b37ab8eb07ae71 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Thu, 16 Jun 2011 16:10:27 -0400
Subject: [PATCH 6/7] Handle un-initialized GOP.

---
 apps/modelist.c |   27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/apps/modelist.c b/apps/modelist.c
index c4a4b1a..8d816d1 100644
--- a/apps/modelist.c
+++ b/apps/modelist.c
@@ -3,6 +3,26 @@
 
 extern EFI_GUID GraphicsOutputProtocol;
 
+static int memcmp(const void *s1, const void *s2, UINTN n)
+{
+	const unsigned char *c1 = s1, *c2 = s2;
+	int d = 0;
+
+	if (!s1 && !s2)
+		return 0;
+	if (s1 && !s2)
+		return 1;
+	if (!s1 && s2)
+		return -1;
+
+	while (n--) {
+		d = (int)*c1++ - (int)*c2++;
+		if (d)
+			break;
+	}
+	return d;
+}
+
 static void
 print_modes(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
 {
@@ -17,6 +37,13 @@ print_modes(EFI_GRAPHICS_OUTPUT_PROTOCOL *gop)
 		UINTN SizeOfInfo;
 		rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i, &SizeOfInfo,
 					&info);
+		if (EFI_ERROR(rc) && rc == EFI_NOT_STARTED) {
+			rc = uefi_call_wrapper(gop->SetMode, 2, gop,
+				gop->Mode->Mode);
+			rc = uefi_call_wrapper(gop->QueryMode, 4, gop, i,
+				&SizeOfInfo, &info);
+		}
+
 		if (EFI_ERROR(rc)) {
 			CHAR16 Buffer[64];
 			StatusToString(Buffer, rc);
-- 
1.7.10.4