AGP: document boot options

Add documentation for AGP boot options.

Signed-off-by: Chuck Ebbert <cebbert@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index fb80e9ffea68..1156653338fe 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -30,6 +30,7 @@ the beginning of each description states the restrictions within which a
 parameter is applicable:
 
         ACPI    ACPI support is enabled.
+        AGP     AGP (Accelerated Graphics Port) is enabled.
         ALSA    ALSA sound support is enabled.
         APIC    APIC support is enabled.
         APM     Advanced Power Management support is enabled.
@@ -227,6 +228,12 @@ and is between 256 and 4096 characters. It is defined in the file
                         to assume that this machine's pmtimer latches its value
                         and always returns good values.
 
+        agp=            [AGP]
+                        { off | try_unsupported }
+                        off: disable AGP support
+                        try_unsupported: try to drive unsupported chipsets
+                                (may crash computer or cause data corruption)
+
         enable_timer_pin_1 [i386,x86-64]
                         Enable PIN 1 of APIC timer
                         Can be useful to work around chipset bugs