diff options
| author | Ojaswin Mujoo <ojaswin98@gmail.com> | 2021-08-02 23:12:11 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-08-10 12:08:46 +0200 |
| commit | 69c92a749b89a7654084d0afd774018008a8de49 (patch) | |
| tree | a75dca21ecc1e9ce6e889c4bdaa89afc9698ffce /drivers/staging/vc04_services | |
| parent | bb13dc2b3d8a7c6157ecaf680c435e7b2fbe4613 (diff) | |
staging: vchiq: Add details to Kconfig help texts
Add some details to the Kconfig definitions of $CONFIG_VCHIQ_CDEV and
$CONFIG_BCM2835_VCHIQ to help make the motive behind the configs a bit
more clear.
Reviewed-by: Stefan Wahren <stefan.wahren@i2se.com>
Signed-off-by: Ojaswin Mujoo <ojaswin98@gmail.com>
Link: https://lore.kernel.org/r/ab88d3222088aca29a319147b50a9d1e9f0f8b81.1627925241.git.ojaswin98@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/vc04_services')
| -rw-r--r-- | drivers/staging/vc04_services/Kconfig | 21 |
1 files changed, 15 insertions, 6 deletions
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 |