Commit 49c6695c authored by Dave Stevenson's avatar Dave Stevenson Committed by popcornmix
Browse files

staging: vc04_services: Add new vc-sm-cma driver 



This new driver allows contiguous memory blocks to be imported
into the VideoCore VPU memory map, and manages the lifetime of
those objects, only releasing the source dmabuf once the VPU has
confirmed it has finished with it.

Signed-off-by: default avatarDave Stevenson <dave.stevenson@raspberrypi.org>
parent b2980458

drivers/staging/vc04_services/Kconfig

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@@ -22,6 +22,7 @@ source "drivers/staging/vc04_services/bcm2835-audio/Kconfig" 


source "drivers/staging/vc04_services/bcm2835-camera/Kconfig"

source "drivers/staging/vc04_services/vchiq-mmal/Kconfig"

source "drivers/staging/vc04_services/vc-sm-cma/Kconfig"



endif

drivers/staging/vc04_services/Makefile

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@@ -13,6 +13,7 @@ vchiq-objs := \ 
obj-$(CONFIG_SND_BCM2835)	+= bcm2835-audio/

obj-$(CONFIG_VIDEO_BCM2835)	+= bcm2835-camera/

obj-$(CONFIG_BCM2835_VCHIQ_MMAL) += vchiq-mmal/

obj-$(CONFIG_BCM_VC_SM_CMA) 	+= vc-sm-cma/



ccflags-y += -Idrivers/staging/vc04_services -D__VCCOREVER__=0x04000000

drivers/staging/vc04_services/vc-sm-cma/Kconfig

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config BCM_VC_SM_CMA

	tristate "VideoCore Shared Memory (CMA) driver"

	depends on BCM2835_VCHIQ

	select RBTREE

	select DMA_SHARED_BUFFER

	help

	  Say Y here to enable the shared memory interface that

	  supports sharing dmabufs with VideoCore.

	  This operates over the VCHIQ interface to a service

	  running on VideoCore.

drivers/staging/vc04_services/vc-sm-cma/Makefile

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ccflags-y += -Idrivers/staging/vc04_services -Idrivers/staging/vc04_services/interface/vchi -Idrivers/staging/vc04_services/interface/vchiq_arm

# -I"drivers/staging/android/ion/" -I"$(srctree)/fs/"

ccflags-y += -D__VCCOREVER__=0



vc-sm-cma-$(CONFIG_BCM_VC_SM_CMA) := \

	vc_sm.o vc_sm_cma_vchi.o



obj-$(CONFIG_BCM_VC_SM_CMA) += vc-sm-cma.o

drivers/staging/vc04_services/vc-sm-cma/TODO

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1) Convert to a platform driver.