Caution: This version of this document is no longer maintained. For the latest documentation, see

Graphics driver for Silicon Motion SM501 chipset


io-graphics -d smi5xx [option[,option...]]
            ... &

Runs on:



For the general io-graphics options that you can use with this driver, see io-graphics.

Options specific to this driver:

The full path to the configuration file for the driver. The sample file is /usr/photon/config/smi5xx.conf.


The driver provides accelerated 2D support for the Silicon Motion SM501 graphics chip.

You can edit the configuration file to enable to run on your board. Follow the editing instructions in the sample file, /usr/photon/config/smi5xx.conf, to specify the correct configuration for the required display mode. (For a more detailed explanation of the display settings, see the appropriate Silicon Motion documentation.)

If you use a configuration file for this driver, you must use the mode_opts option of io-graphics to specify its location. For example, mode_opts=/usr/photon/config/smi5xx.conf.

Supported chipsets

Acceleration features

Feature Provision
Solid fills Yes
Bresenham lines Yes
Pattern fills Yes
Polygons No
Onscreen blitting Yes
Offscreen blitting Yes
Chroma-keyed blitting Yes
Alpha blending No
Raster OPs Full
Bitmaps Yes

Video Overlay/Scaler support

Feature Provision
YUV formats Yes
RGB formats Yes
Up scaling Yes
Down scaling Yes

Other features

Feature Provision
Hardware Cursor Yes
TV Out No
Video capture Yes
DPMS (power saving) Yes
Layers supported 4
Dual display Yes

Resolution and refresh support

Display size (pixels): Refresh rate(Hz): Color depth (bits
640x480 60 8, 16, 32
800x600 60 8, 16, 32a
1024x768 60 8, 16, 32a

a Requires a driver configuration file.

Note: You can use the driver configuration file to configure other resolutions and refresh rates.


This driver needs the following at run time:
Software rasterization library.

See also:

crttrap, devgt-iographics, io-graphics