On Thu, 20 Aug 2020 at 19:49, Paul Boddie <paul@xxxxxxxxxxxxx> wrote: > > On Thursday, 20 August 2020 10:19:45 CEST H. Nikolaus Schaller wrote: > > > > Yes, it works!!! > > It still doesn't work for me. I still get "Input not supported" from my > monitor. It is a DVI monitor connected via a HDMI adapter, but EDID probing > works and, as I noted previously, the HDMI/LCDC can be made to work (and > obviously did work in the 3.18 kernel). > This means the dw_hdmi encoder driver is still not good enough to support your adapter. I haven't yet compared v3.18 vendor with our version, but I'm afraid that the dw_hdmi stack has probably changed quite a bit, so a comparison will be difficult. The natural debug path for me would be to checkout v3.18, connect your DVI monitor and make a dump of all the dw_hdmi registers, then make the same dump for our mainline kernel -- making sure we are comparing the same mode. > I used my usual recipe for kernel compilation: > > ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- make ci20_defconfig > ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- make menuconfig > ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- make -j8 uImage > ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- make -j8 modules > ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- make -j8 dtbs > sudo sh -c 'INSTALL_MOD_PATH=nn ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- \ > make modules_install' > sudo sh -c 'INSTALL_PATH=nn/boot ARCH=mips CROSS_COMPILE=mipsel-linux-gnu- \ > make dtbs_install' > sudo cp arch/mips/boot/uImage nn/boot/ > > This was with a snapshot archive made from the following changeset: > > b911b4883bfe4f7fa753ac2ff42b25fa6b3055e2 > > I downloaded it from here: > > https://gitlab.collabora.com/linux/0day/-/tree/jz4780-drm-hdmi-v5.9-rc1 > > (I was going to clone the repository late last night, but it was taking a long > time and I also didn't want to clone everything yet again.) > If you want to avoid cloning the same things over and over you can use git-clone --reference. And if you want to checkout just a single branch, git now has --single-branch. For instance, (assuming a torvalds/ local repo): git clone -b letux/jz4780-hdmi-v4 --single-branch git://git.goldelico.com/letux-kernel.git --reference torvalds/ letux > > There are some unexpected things related to CONFIG settings on my setup > > (maybe missing modules) but for the first time I can see the boot log on the > > panel. > > > This needs some more investigation, but seems at least a good start. > > > > Yes it is! > > > > I can now git diff the code and the CONFIG. > > > > So it seems we have indeed a breakthrough. > > > > Thanks to all who did contribute (even behind the scenes in the DRM > > subsystem), Nikolaus > > Before trying this new branch, I did try and tidy up the branch I had been > working on. I didn't notice all the changes and the new ingenic-drm-drv.c > file, having assumed that not much would have changed in the DRM driver. > > Nevertheless, my attempts at integrating the different branches can be found > in the paulb-jz4780-ci20-hdmi-5.9-rc1 branch, mentioned earlier. > > It would be nice to reconcile the JZ4780 support with the evolving upstream > support, accommodating the extended descriptors and the extra register usage. > I think that's already done in the patches I've cleaned up. The only thing left to check is plane offset and overlay enablement. > Paul > > P.S. I noticed a few problems with the 5.9-rc1 branches such as powering down > not actually removing the power and, in my own branch, networking not working > reliably (or maybe even at all), with the tedious progress indicator never > terminating in the boot sequence. So, once again, it is another case of half a > step forwards and about three steps back. > Life (and kernel) is like this: sometimes you need to take three steps back to make a jump forward :-) _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
