On Thu, Apr 12, 2012 at 5:33 AM, Thierry Reding <thierry.reding@xxxxxxxxxxxxxxxxx> wrote: > * Sascha Hauer wrote: >> You might want to have a look at the sdrm patches I recently posted to >> dri-devel and arm Linux Kernel. Among other things they allow to >> register crtcs/connectors/encoders seperately so that each of them can >> have its own representation in the devicetree. I haven't looked into >> devicetree support for DRM, but with or without devicetree the problem >> that we do not have a single PCI card for registering all DRM components >> is the same. > > I'll do that. One interesting use-case that's been on my mind for some time > is if it would be possible to provide a CRTC via DRM that isn't part of the > SoC or DRM "device" but which can display a framebuffer prepared by the DRM > framework. > > In other words I would like to use the Tegra hardware to render content into > a framebuffer (using potentially the 3D engine or HW accelerated video > decoding blocks) but display that framebuffer with a CRTC registered by a > different driver (perhaps provided by a PCIe or USB device). > > I think such a setup would be possible if the CRTC registration can be > decoupled from the DRM driver. Perhaps sdrm even supports that already? You should be able to do something like that already with dma_buf and the drm prime infrastructure. There's even a drm driver for the udl USB framebuffer devices. Alex -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
