From: Mika Kuoppala mika.kuoppala@intel.com
Add description for drm_kms_helper.poll module parameter introduced by commit: e58f637bb96d5a0ae0919b9998b891d1ba7e47c9
Signed-off-by: Mika Kuoppala mika.kuoppala@intel.com --- Documentation/kernel-parameters.txt | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index f777fa9..ad97749 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -741,6 +741,17 @@ bytes respectively. Such letter suffixes can also be entirely omitted. if its name and a colon are prepended to the EDID name.
+ drm_kms_helper.poll= + Polling for connected VGA devices on older systems + can be quite expensive, causing latencies of + several hundred milliseconds. This will cause visible + stalls, for example in video playback. If you + experience stalls in display output occurring every + 10 seconds (DRM_OUTPUT_POLL_PERIOD=(10*HZ)), disabling + polling might help. + Format: <bool> (1/Y/y=enable, 0/N/n=disable) + default: enabled + dscc4.setup= [NET]
dyndbg[="val"] [KNL,DYNAMIC_DEBUG]