On 12/04/2012 11:50 AM, Stephen Warren wrote: > On 12/03/2012 08:00 PM, Mark Zhang wrote: >> On 11/28/2012 02:37 PM, Mark Zhang wrote: >>> On 11/28/2012 05:39 AM, Stephen Warren wrote: >>>> On 11/27/2012 11:17 AM, Stephen Warren wrote: >>>>> On 11/26/2012 08:16 PM, Mark Zhang wrote: >>>>>> On 11/27/2012 06:37 AM, Stephen Warren wrote: >>>>>>> On 11/22/2012 12:37 PM, Thierry Reding wrote: >>>>>>>> Instead of using the stride derived from the display mode, use the pitch >>>>>>>> associated with the currently active framebuffer. This fixes a bug where >>>>>>>> the LCD display content would be skewed when enabling HDMI with a video >>>>>>>> mode different from that of the LCD. >>>>>>> >>>>>>> This patch certainly doesn't cause any additional issues for me, so: >>>>>>> >>>>>>> Tested-by: Stephen Warren <swarren@xxxxxxxxxx> >>>>>>> >>>>>>> Howwever, it still doesn't allow both Cardhu's LCD panel and external >>>>>>> HDMI port (1080p) to be active at once. If I boot with both enabled, or >>>>>>> boot with just the LCD enabled and hot-plug HDMI, as soon as both heads >>>>>>> are active, then some kind of display corruption starts; it looks like a >>>>>>> clocking issue or perhaps memory underflow. >>>>>> >>>>>> I haven't observed this issue. What kind of display corruption you mean? >>>>>> Did it recover after some seconds or the display in LVDS panel was >>>>>> always corrupted? >>>>>> >>>>>> During my testing, I connected HDMI while booting cardhu and I can see >>>>>> the LVDS and HDMI working with no corruptions. >>>>> >>>>> For your viewing pleasure (and playing with my new phone) :-) >>>>> http://www.youtube.com/watch?v=ZJxJnONz7DA >>>>> >>>>> The external monitor is 1920x1200 I believe. >>>> >>>> Jon Mayo says the corruption in the video is display (memory fetch) >>>> underflow. Perhaps this is because (IIRC) the BCT I'm using on Cardhu >>>> programs the memory controller at a slow rate, and the bootloader and/or >>>> kernel is supposed to bump up the rate to the max, but that's not >>>> implemented anywhere yet upstream. If you're testing with "fastboot" >>>> instead of U-Boot, that might be re-programming the memory frequencies, >>>> and hence avoiding this. >>>> >>> >>> All right, I just test the framebuffer console and "xinit", I didn't >>> install the whole ubuntu. >>> >>> I'll install the ubuntu in my cardhu and see whether I have this kind of >>> issues. >> >> Hi swarren, I installed ubuntu 12.04 in l4t and didn't observe the issue >> you described. The display worked with no corruptions. I can show you >> the video if you want. >> >> What I used for testing is a cardhu board with our downstream U-Boot. >> >> But the HDMI didn't work. The HDMI monitor showed this: "CANNOT DISPLAY >> THIS VIDEO MODE, CHANGE COMPUTER DISPLAY INPUT TO 1920x1080@60HZ". So >> sounds like the clock setting has some problems... I'll have a look at this. > > Oh, I thought I'd followed up on this - Jon Mayo said it was display > underflow due to lack of memory bandwidth. IIRC, this may be due to the > BCT programming the memory controller for conservative settings that > don't require non-default voltages from the PMIC, with the expectation > that the bootloader or kernel will reprogram everything for correct > performance. > OK, I see. But my HDMI doesn't work so I will spend some time digging it. Mark _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
