From cbac507d93dc357a75ccc11fdda5c7ed60935538 Mon Sep 17 00:00:00 2001
From: Leah Rowe <leah@libreboot.org>
Date: Sun, 13 Jul 2025 15:18:53 +0100
Subject: [PATCH 1/1] re-try EDID reading when it fails

some video converters are a bit buggy and have to be
probed twice; linux works fine, but in these cases,
coreboot won't set up the display.

try it twice, to mitigate, when probing the EDID

This entire function should probably be rewritten, since
it's buggy in general.

Signed-off-by: Leah Rowe <leah@libreboot.org>
---
 common/hw-gfx-gma-display_probing.adb | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/common/hw-gfx-gma-display_probing.adb b/common/hw-gfx-gma-display_probing.adb
index 67f8ddf..0500217 100644
--- a/common/hw-gfx-gma-display_probing.adb
+++ b/common/hw-gfx-gma-display_probing.adb
@@ -122,6 +122,11 @@ is
          Read_EDID (Raw_EDID, Port, Success);
       end if;
 
+      if not Success then
+         Panel.Wait_On (Config_Helpers.To_Panel (Port));
+         Read_EDID (Raw_EDID, Port, Success);
+      end if;
+
       if Success and then
          ((not Is_DVI_I (Port) or EDID.Compatible_Display
             (Raw_EDID, Config_Helpers.To_Display_Type (Port))) and
-- 
2.39.5

