diff options
| author | Timur Tabi | 2011-03-21 16:38:49 -0500 |
|---|---|---|
| committer | Anatolij Gustschin | 2011-04-28 21:31:02 +0200 |
| commit | a5dbdc81ea70daa04e49eb0004a0441131a029c6 (patch) | |
| tree | 82c8239819c405c007953a3b8d3353d4115f6496 /doc | |
| parent | 74446b63dd4ec386fc5de554d5c4a3536096072f (diff) | |
video: parse the video-mode environment variable
Add function video_get_video_mode(), which parses the "video-mode" environment
variable and returns each of its components. The format matches the video=
command-line option used for Linux:
video-mode=<driver>:<xres>x<yres>-<depth>@<freq><,option=string>
<driver> The video driver, ignored by U-Boot
<xres> The X resolution (in pixels) to use.
<yres> The Y resolution (in pixels) to use.
<depth> The color depth (in bits) to use.
<freq> The frequency (in Hz) to use.
<options> A comma-separated list of device-specific options
Signed-off-by: Timur Tabi <timur@freescale.com>
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/README.video | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/doc/README.video b/doc/README.video index 34e199c2d29..0c04bea571b 100644 --- a/doc/README.video +++ b/doc/README.video @@ -28,3 +28,22 @@ The driver has been tested with the following configurations: - MPC823FADS with AD7176 on a PAL TV (YCbYCr) - arsenio@tin.it - GENIETV with AD7177 on a PAL TV (YCbYCr) - arsenio@tin.it + + +"video-mode" environment variable +=============================== + +The 'video-mode' environment variable can be used to enable and configure +some video drivers. The format matches the video= command-line option used +for Linux: + + video-mode=<driver>:<xres>x<yres>-<depth>@<freq><,option=string> + + <driver> The video driver name, ignored by U-Boot + <xres> The X resolution (in pixels) to use. + <yres> The Y resolution (in pixels) to use. + <depth> The color depth (in bits) to use. + <freq> The frequency (in Hz) to use. + <options> A comma-separated list of device-specific options + +Example: video-mode=fslfb:1280x1024-32@60,monitor=dvi |