On Sun, Nov 06, 2022 at 11:02:23PM +0200, Oded Gabbay wrote: > Add a new Kconfig for the accel subsystem. The Kconfig currently > contains only the basic CONFIG_DRM_ACCEL option that will be used to > decide whether to compile the accel registration code. Therefore, the > kconfig option is defined as bool. > > The accel code will be compiled as part of drm.ko and will be called > directly from the DRM core code. The reason we compile it as part of > drm.ko and not as a separate module is because of cyclic dependency > between drm.ko and the separate module (if it would have existed). > This is due to the fact that DRM core code calls accel functions and > vice-versa. > > The accelerator devices will be exposed to the user space with a new, > dedicated major number - 261. > > The accel init function registers the new major number as a char device > and create corresponding sysfs and debugfs root entries, similar to > what is done in DRM init function. > > I added a new header called drm_accel.h to include/drm/, that will hold > the prototypes of the drm_accel.c functions. In case CONFIG_DRM_ACCEL > is set to 'N', that header will contain empty inline implementations of > those functions, to allow DRM core code to compile successfully > without dependency on CONFIG_DRM_ACCEL. > > I Updated the MAINTAINERS file accordingly with the newly added folder > and I have taken the liberty to appropriate the dri-devel mailing list > and the dri-devel IRC channel for the accel subsystem. > > Signed-off-by: Oded Gabbay <ogabbay@xxxxxxxxxx> Tested-by: Stanislaw Gruszka <stanislaw.gruszka@xxxxxxxxxxxxxxx> I tested those patches with intel_vpu driver. After initial troubles, I got things worked with our driver and user mode components. Regards Stanislaw
