On Tue, 25 Jun 2013 16:47:26 -0400 (EDT) Daniel Drake <dsd@xxxxxxxxxx> wrote: > Hi Russell, > > Thanks a lot for writing the Armada DRM driver. > > I have tested it on OLPC XO-1.75 (MMP2 aka Armada610) and OLPC XO-4 (MMP3 > aka PXA2128). After a bit of fighting, I have it running. Could you share your > X driver, or your methodology for testing hardware cursors? I'd like to test > your work there too. > > It's probably easiest to get your cubox driver merged before adding MMP2/MMP3 > complications into the mix. At that point, I will hopefully have time to > follow up developing MMP2/MMP3 support, which will involve the points > mentioned below. > > A hacky patch is also included below, which makes the driver run on this > platform. I'm prepared to do the heavy lifting in implementing these changes > properly, but any high level guidance would be appreciated, especially as I > am new to the world of graphics. > > Ordered roughly from highest to lowest importance: > > > 1. Device tree support [snip] > > 2. Panel support. [snip] > > 3. Register space conflicts [snip] > > 4. Video memory [snip] > > 5. Output paths [snip] > > I will work on getting you an XO in case you are interested in testing the > driver there from time to time or even helping to develop support. But first I > need to get it bootable on mainline kernels (patches posted, waiting for > review). > > Thanks! > Daniel Hi Daniel, Do you know that there are 2 drm drivers for the Cubox? I posted mine (http://lists.infradead.org/pipermail/linux-arm-kernel/2013-May/168732.html) before Russell, but I got no return about it yet. As it uses the CMA helper (no handling of the Cubox GPU/VPU), my driver is simpler and does not need any specific memory reservation. It has full DT support. The Cubox specific drivers are build as loadable modules (dove-drm driver, tda998x hdmi slave encoder, si5351 clock driver and kirkwood i2s/spdif audio driver). The synchronization of module loading at startup time is done by EPROBE_DEFER. The DT permits each CRTC to use any of up to 4 clocks. It is designed to handle 2 CTRCs and 2 couples of encoder/connector only. LCD panel description (modeline / dimension) is done in the DT. If you are interested or simply curious, I put my whole Cubox work in http://moinejf.free.fr/cubox/ (I have some fixes that I will upload as soon as I have a running 3.10.0-rc7 kernel compiled with gcc 4.8.1!). The big kernel patch contains the dove-drm driver (in drivers/gpu/drm/dove/) and the Cubox DT (arch/arm/boot/dts/dove.dtsi and dove-cubox.dts). -- Ken ar c'hentañ | ** Breizh ha Linux atav! ** Jef | http://moinejf.free.fr/ _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
