On Wed, Apr 3, 2013 at 5:21 PM, Kero <kero@xxxxxxxxx> wrote: > Hi, > > I would not mind improving use of my Asus EeePC X101CH with Cedar View / gma3600 > a bit more. But a barrier is knowledge of the hardware. Meddling with existing (initialization) > code is possible, but for point 1 and 3 below that is not going to cut, it, I expect. It would be very useful if you could help out with cedarview. Even if it's just by testing patches. A big problem for me is that I don't have the hardware so it's easy to break things without even knowing about it. > > Does anyone have pointers? Who should I talk to about specifications? > I know Intel is not forthcoming with documentation, yet several people have > made contributions for poulsbo and later versions of the hardware. > How did you get the required knowledge? Most of the mode setting stuff are variations of Intel hardware. You can find specifications at https://01.org/linuxgraphics/ and it's also useful to look at the Intel i915 drm driver for reference. It is quite a mix so you need to look at bits and pieces from several of the Intel generations and try to match them together. For the non-Intel parts there are some drivers that never made it into mainline but is still available online. Some parts are open and some are closed. There is also a fair amount of guessing and probing needed. > > Things I might, in order of personal preference, in due time (after holiday), take a look at: > 1) would be nice to have the full 1024x600 on the external VGA and HDMI > I had a chance to try another monitor over HDMI, same result: only 800x600 visible. > 2) booting with either VGA or HDMI plugged in, yields two black screens: both the laptop > and the monitor. Un- + re-plugging has no visible effect. > 3) the Fn keys for the backlight induce a response in the backlight, but only with > tiny results; /sys/class/backlight/psb-bl/brightness works fine, though > 4) when using modules, initialization from hibernation is not good enough: > my screen stays black; without using modules, the kernel boots normally, and everything is fine. > 5) initialization from suspend is not good enough: my Asus stays in > some text mode (80x25?), but shows garbage (possibly data from the desired console or > graphics mode, since sometimes there are reactions correlated to actions) > Switching tty or using `chvt` do not improve anything. > NB: hibernating and booting solves this. There are quite a few issues that needs to be addressed and code that needs to be refactored. I suggest you just dig in and get your hands dirty. -Patrik _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
