diff options
Diffstat (limited to 'drivers/staging/vc04_services/Kconfig')
| -rw-r--r-- | drivers/staging/vc04_services/Kconfig | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/staging/vc04_services/Kconfig b/drivers/staging/vc04_services/Kconfig index 4b886293f198..cb7c82403dbf 100644 --- a/drivers/staging/vc04_services/Kconfig +++ b/drivers/staging/vc04_services/Kconfig @@ -13,11 +13,31 @@ if BCM_VIDEOCORE 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. 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 source "drivers/staging/vc04_services/bcm2835-audio/Kconfig" |