diff options
| author | Marcus Glocker <mglocker@cvs.openbsd.org> | 2009-08-25 19:48:29 +0000 |
|---|---|---|
| committer | Marcus Glocker <mglocker@cvs.openbsd.org> | 2009-08-25 19:48:29 +0000 |
| commit | efb1e90aa8ec66fd926bac9f18e20eb81fd2eaf3 (patch) | |
| tree | 8d0a65cb4958e2622bcb6d3cf27c4d6a5ee251ae /share | |
| parent | 8bb956b5e94ec033ae20204203e0bfbe4a98c6b7 (diff) | |
Document compression.
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/udl.4 | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/share/man/man4/udl.4 b/share/man/man4/udl.4 index 48ff70d8e0e..9ad45b58ffc 100644 --- a/share/man/man4/udl.4 +++ b/share/man/man4/udl.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: udl.4,v 1.10 2009/07/23 18:29:50 maja Exp $ +.\" $OpenBSD: udl.4,v 1.11 2009/08/25 19:48:28 mglocker Exp $ .\" .\" Copyright (c) 2009 Marcus Glocker <mglocker@openbsd.org> .\" @@ -14,7 +14,7 @@ .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" -.Dd $Mdocdate: July 23 2009 $ +.Dd $Mdocdate: August 25 2009 $ .Dt UDL 4 .Os .Sh NAME @@ -43,6 +43,17 @@ The following devices should work: .It Sunweit USB to DVI .It Unitek Y-2240 USB to DVI .El +.Sh FILES +The device can process compressed data (Huffman pixel difference method) +to reduce the USB payload. To generate the compressed data, the driver +needs to load a Huffman table which is stored in the following binary file: +.Pp +.Bl -tag -width Ds -offset indent -compact +.It Pa /etc/firmware/udl_huffman +.El +.Pp +If the Huffman table can't be loaded, the driver will fall back to +uncompressed mode. .Sh SEE ALSO .Xr intro 4 , .Xr usb 4 , |