From: Mika Kuoppala <mika.kuoppala at intel.com> Add description for drm_kms_helper.poll module parameter introduced by commit: e58f637bb96d5a0ae0919b9998b891d1ba7e47c9 Signed-off-by: Mika Kuoppala <mika.kuoppala at 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] -- 1.7.9.5
