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ca09693ba2
video width/height size can vary not only as a function of the video standard but also in function of device capabilities. Due to that, the code were trying to get those info from the hardware. However, due to a driver bug, the info is not properly filled when the video standard is changed. While I intend to fix this inside the drivers, the current logic doesn't work with the current stable kernels. So, use an alternative way of getting this info, just using video standards information. Let's keep the not working code there, in order to make easy to return, after fixing the drivers. We'll probably need to check for driver versions after reenabling the correct (not working) code, or to use the new VIDIOC ioctl's to enumberate the supported formats. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Video 4 Linux adaptor driver for XFree86 v4.0
Developed by Gerd Knorr <kraxel@goldbach.in-berlin.de> and
David Woodhouse <David.Woodhouse@mvhi.com>
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This chipset driver does not provide a graphics adaptor driver, but instead
registers a number of generic Xv adaptors which can be used with any graphics
chipset driver.
In order to use v4l adaptors with your favourite graphics driver, the
graphics driver must do two things:
1. Correctly set pScrn->memPhysBase and pScrn->fbOffset for the screens that
it provides, to the physical address of the frame buffer memory, and
the offset within that memory that the current mode starts,
respectively.
2. Use the xf86XVListGenericAdaptors() routine to list all available Xv
adaptors which are usable with any target device, and initialise
them on its screens with xf86XVScreenInit() as follows...
{
XF86VideoAdaptorPtr *ptr;
int xvexts = xf86XVListGenericAdaptors(&ptr);
if (xvexts) {
xf86XVScreenInit(pScreen, ptr, xvexts);
}
}
$XFree86: xc/programs/Xserver/hw/xfree86/drivers/v4l/README,v 1.2 2001/05/07 21:59:07 tsi Exp $