Tomi Valkeinen wrote: > Hi, > > ext Gary Thomas wrote: >>>> Second question; I've set up my system much the same as the >>>> boards you are working on, with an LCD and TV outputs. I'm >>>> a bit confused as to how I configure the overlays and managers >>>> to be able to send YUV data directly through to either the >>>> LCD or TV. Can you explain this? >>> You need to change the framebuffer to YUV color mode. And YUV only works >>> on video overlays, so you need to setup video overlay to be shown on the >>> LCD or TV. >>> >>> If you have fb1 as a video overlay, you can do for example: >>> >>> fbset -fb /dev/fb1 -nonstd 1 >>> >>> which sets fb1 to YUV422 mode. 8 would be YUY422. Those numbers come >>> from omapfb.h, enum omapfb_color_format. >>> >>> Check also Documentation/arm/OMAP/DSS, if you haven't already done so. >>> >> >> Still a bit fuzzy on this. I'm sure that document helps, if >> one already knows how all the overlays and managers and ... >> are wired together. I'm new at this game :-) >> >> I tried to set my TV to be video/uyv422 via the attached script. >> I was trying to leave fb0 alone (running on the LCD) and use fb1 >> to display the YUV422 data. Alas, 'fbset' gives me "Bad video mode"? >> Any pointers? >> > > You need to allocate memory for the framebuffer. > > Try adding for example this: > > mem=$((w*h*4)) > echo $mem > $fb1/size > > Also, you are trying to connect video2 overlay to fb1, but by default > DSS connects video2 to fb2. So if you really want to do that, you first > need to detach video1 from fb1, video2 from fb2, and then attach video2 > to fb1. I suggest you use fb2 which is already attached to video2. That helped, thanks. 'fbset' no longer complains and I now have a lovely green screen on my TV. Now, to figure out how to send some YUV422 data to it. I have Vaibhav's V4L2 support in my tree - will this work with your DSS2 devices? -- ------------------------------------------------------------ Gary Thomas | Consulting for the MLB Associates | Embedded world ------------------------------------------------------------ -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
