broadcom BCM_VC_SM removal from >=5.10.y kernels
Nobody has claimed this yet.
Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 30/100
- Issue type
- Feature
- Clarity
- Clearly specified
- Activity status
- Stale
- Tech stack
- c, linux
- Domain
- embedded-iot, operating-systems
Research direction
Start by comparing drivers/staging/vc04_services/vc-sm-cma/vc_sm.c with the existing drivers/char/broadcom/vc_sm/ implementation and its Kconfig and Makefile entries. Check how BCM_VC_SM is configured and built in kernels from 5.10 onward. Done means the broadcom character device is available on recent Raspberry Pi kernels and supports the stated Kodi HEVC decoding use case.
Written by the indexing model from the issue text.
Description
Hi folks,
drivers/staging/vc04_services/vc-sm-cma/vc_sm.c as configured by kernel configuration option: BCM_VC_SM has been removed from 5.10.y kernels and onwards.
It seems like this allowed kodi-rbpi to perform optimal hevc decoding through mmal, thus kodi-rbpi works smooth on kernels:
5.4.44, 5.4.83, 5.4.y and previous
but does not work on anything after it, such as 5.10.x and 5.11.0.
Can we have this broadcom char device re-added to the more recent kernels, same way it exists on 5.4.x:
./drivers/char/broadcom/vc_sm/Makefile:obj-$(CONFIG_BCM_VC_SM) := vc-sm.o
./drivers/char/broadcom/Kconfig:config BCM_VC_SM
./drivers/char/broadcom/Makefile:obj-$(CONFIG_BCM_VC_SM) += vc_sm/
This will allow raspberrypi 3 devices to run more recent kernels with kodi-rbpi binaries which decode hevc pretty recently.
Thanks
- Dominant language
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- Merged PRs (30d)
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