`devg-tvia.so`

Graphics driver for TVIA CyberPro chipsets

Syntax:

io-display [-vf]
           -d vid=[0x]vendor_id,did=[0x]device_id[,deviceindex=index]
           [-c config_file] [-p priority]

Options:

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

You can set configuration options that are specific to this driver by using the modeopts setting in display.conf:

modeopts=config-file: The full path to the configuration file for the driver. For example, tvia.conf is located in /usr/photon/config by default so that the sample file is /usr/photon/config/tvia.conf.

Description:

The devg-tvia.so driver provides accelerated 2D support for TVIA graphics chipset.

On non-x86 systems, install jumper JP3 on the reference adapter.

You can edit the configuration file to enable devg-tvia.so to run on your board. For more information on the options available, see the sample configuration file, /usr/photon/config/tvia.conf.

If you use a configuration file for this driver, you must use the modeopts in your display.conf to specify its location.

Graphics drivers run at a higher priority than applications, but they shouldn't run at a higher priority than the audio, or else breaks in the audio occur. You can use the on command to adjust the priorities of the audio and graphics drivers.

Supported chipsets

CyberPro 5200
CyberPro 5250
CyberPro 5300
CyberPro 5305
CyberPro 5350
CyberPro 5355

Acceleration features

Feature	Provision
Solid fills	Yes
Bresenham lines	No
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 (Packed)
RGB formats	Yes (RGB 555, 565, 888, 8888)
Up scaling	Yes
Down scaling	No

Other features

Feature	Provision
Hardware Cursor	Yes
TV Out (PAL and NTSC)	Yes
Video capture	No
DPMS (power saving)	Yes

Resolution and refresh support

Display size (pixels):	Refresh rate(Hz):	Color depth (bits per pixel):
640x480	60, 72, 75, 85	8, 15, 16, 24, 32
800x600	60, 70, 75, 85	8, 15, 16, 24, 32
1024x768	60, 70, 75, 85	8, 15, 16, 24, 32
1152x864	60, 70, 75, 85	8, 15, 16, 24, 32
1280x800	60, 72, 75, 85	8, 15, 16, 24, 32
1280x1024	60, 72, 75, 85	8, 15, 16, 24, 32
1440x900	60, 72, 75, 85	8, 15, 16, 24, 32
1600x1200	60, 72, 75, 85	8, 15, 16, 24, 32

Restrictions:

Higher resolution and color depths may require more video RAM.
When using TV OUT, refresh rates are not available.
Resolutions above 1024x768 might not display data correctly because of an issue with memory bandwidth.

Files:

This driver needs the following at run time:

libffb.so: Software rasterization library.