[libcamera-devel] [PATCH 0/2] Replace vcsm with dmabuf alloc

[Laurent Pinchart]

Hi Naush,

On Tue, Jul 14, 2020 at 01:08:42PM +0100, Naushir Patuck wrote:
> Hi,
> 
> This patch replaces the existing vcsm with dmabuf allocations for the lens shading tables.
> This change will break existing functionality without the equivalent linux kernel
> change (https://github.com/raspberrypi/linux/pull/3715) being present and built..
> 
> Laurent, since this is an ABI breakage, once the review is complete, could you
> let me know before you are about to merge this change so we can sync push the
> kernel change at the same time and inform our users please?

Sure, I'll do so.

> Naushir Patuck (2):
>   include: linux: Add dma-buf.h and dma-heap.h uapi headers
>   libcamera: pipeline: ipa: raspberrypi: Use dma heap allocs for LS
>     tables
> 
>  include/linux/bcm2835-isp.h                   |   4 +-
>  include/linux/dma-buf.h                       |  50 ++++++
>  include/linux/dma-heap.h                      |  53 +++++++
>  include/linux/vc_sm_cma_ioctl.h               | 135 ----------------
>  src/ipa/raspberrypi/raspberrypi.cpp           |  27 +++-
>  .../pipeline/raspberrypi/dma-heaps.h          | 102 ++++++++++++
>  .../pipeline/raspberrypi/raspberrypi.cpp      |  44 ++----
>  src/libcamera/pipeline/raspberrypi/vcsm.h     | 149 ------------------
>  8 files changed, 241 insertions(+), 323 deletions(-)
>  create mode 100644 include/linux/dma-buf.h
>  create mode 100644 include/linux/dma-heap.h
>  delete mode 100644 include/linux/vc_sm_cma_ioctl.h
>  create mode 100644 src/libcamera/pipeline/raspberrypi/dma-heaps.h
>  delete mode 100644 src/libcamera/pipeline/raspberrypi/vcsm.h

-- 
Regards,

Laurent Pinchart