This series adds a basic DRM driver for NVIDIA Tegra 2 processors. It currently only supports the RGB output and I've successfully tested it against the fbcon kernel module and the xf86-video-modesetting driver. The code uses the Tegra's IOMMU/GART to remap non-contiguous memory. This means that currently video memory is limited to 32 MB, the size of the GART aperture.
Note that this is very early work-in-progress and there is a lot of room for improvement and cleanup. You'll also note that there is still a whole lot of debugging output, most of which is disabled by default.
However I explicitly wanted to post this early to get feedback and to discuss options on how to get this included in the mainline kernel. I have been in contact with some people at NVIDIA and they seem to be willing to work together on a solution that satisfies both their requirements and those of the community.
Thierry
Thierry Reding (3): iommu: tegra/gart: Add device tree support drm: fixed: Add dfixed_frac() macro drm: Add NVIDIA Tegra support
Vandana Salve (1): iommu: tegra/gart: use correct gart_device
.../devicetree/bindings/gpu/drm/tegra.txt | 24 + arch/arm/boot/dts/tegra20.dtsi | 6 + arch/arm/mach-tegra/board-dt-tegra20.c | 4 + arch/arm/mach-tegra/tegra2_clocks.c | 8 +- drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/tegra/Kconfig | 10 + drivers/gpu/drm/tegra/Makefile | 5 + drivers/gpu/drm/tegra/tegra_drv.c | 2241 ++++++++++++++++++++ drivers/gpu/drm/tegra/tegra_drv.h | 184 ++ drivers/iommu/tegra-gart.c | 12 +- include/drm/drm_fixed.h | 1 + include/drm/tegra_drm.h | 44 + 13 files changed, 2537 insertions(+), 5 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpu/drm/tegra.txt create mode 100644 drivers/gpu/drm/tegra/Kconfig create mode 100644 drivers/gpu/drm/tegra/Makefile create mode 100644 drivers/gpu/drm/tegra/tegra_drv.c create mode 100644 drivers/gpu/drm/tegra/tegra_drv.h create mode 100644 include/drm/tegra_drm.h