From c61397fbd9ccea27c9879b6951cc518b664666e8 Mon Sep 17 00:00:00 2001
From: Anssi Hannula <anssi@mageia.org>
Date: Thu, 5 Apr 2012 02:49:43 +0000
Subject: display_driver_helper: return false for --is-kms-allowed when radeon
 firmware is needed but not installed

---
 NEWS                        |  3 +++
 tools/display_driver_helper | 16 ++++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/NEWS b/NEWS
index 78040f4..f278e51 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,9 @@
     X server in that case
   o load radeon module with modeset=0 when no firmware is installed
     (see mga#3466)
+  o report KMS as not allowed with --is-kms-allowed on radeon hardware
+    without radeon firmware, so that 'nokmsboot' will be used on such
+    cases
 
 Version 0.99 - 18 December 2011
 - default to 24bit with QXL driver (16 bit doesn't work)
diff --git a/tools/display_driver_helper b/tools/display_driver_helper
index 7fe63c5..b15fad6 100644
--- a/tools/display_driver_helper
+++ b/tools/display_driver_helper
@@ -330,6 +330,22 @@ is_kms_allowed() {
 		# Check all drivers for conflicts only.
 		check_xorg $driver 0 || return 1
 	done
+
+	# Perform full check for KMS drivers of present hardware.
+	# Needed for e.g. checking if radeon firmware is present.
+	for modalias in $(get_hw_display_modaliases); do
+		for modulename in $(/sbin/modprobe -Rq "$modalias"); do
+			for driver in $KMS_DRIVERS; do
+				if [ "$driver" = "$modulename" ]; then
+					check_driver "$modulename" "$modalias" || return 1
+					# Driver was ok but needs KMS disabled:
+					[ -n "$IS_KMS" ] || return 1
+					break
+				fi
+			done
+		done
+	done
+
 	return 0
 }
 
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