diff --git a/drivers/staging/vc04_services/Kconfig b/drivers/staging/vc04_services/Kconfig index ad44b80f13ca..cb7c82403dbf 100644 --- a/drivers/staging/vc04_services/Kconfig +++ b/drivers/staging/vc04_services/Kconfig @@ -15,18 +15,27 @@ config BCM2835_VCHIQ tristate "BCM2835 VCHIQ" imply VCHIQ_CDEV help - Kernel to VideoCore communication interface for the - BCM2835 family of products. - Defaults to Y when the Broadcom Videocore services - are included in the build, N otherwise. + Broadcom BCM2835 and similar SoCs have a VPU called VideoCore. This config + enables the VCHIQ driver, which implements a messaging interface between + the kernel and the firmware running on VideoCore. Other drivers use this + interface to communicate to the VPU. More specifically, the VCHIQ driver is + used by audio/video and camera drivers as well as for implementing MMAL + API, which is in turn used by several multimedia services on the BCM2835 + family of SoCs. + Defaults to Y when the Broadcom Videocore services are included in + the build, N otherwise. if BCM2835_VCHIQ config VCHIQ_CDEV bool "VCHIQ Character Driver" help - Enable the creation of VCHIQ character driver to help - communicate with the Videocore platform. + Enable the creation of VCHIQ character driver. The cdev exposes ioctls used + by userspace libraries and testing tools to interact with VideoCore, via + the VCHIQ core driver (Check BCM2835_VCHIQ for more info). + This can be set to 'N' if the VideoCore communication is not needed by + userspace but only by other kernel modules (like bcm2835-audio). If not + sure, set this to 'Y'. endif