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>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index fb80e9ffea68b7a0f8d1bbcd0229957276cfe747..1156653338fe7baefff9246e50e4724cb8d8e07c 100644 (file)
--- 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