Re: [PATCH v1] misc: fastrpc: Move fastrpc driver to misc/fastrpc/

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On Sun, Jun 23, 2024 at 03:19:17PM GMT, Bjorn Andersson wrote:
> On Fri, Jun 21, 2024 at 05:52:32PM GMT, Daniel Vetter wrote:
> > On Fri, Jun 21, 2024 at 09:40:09AM -0600, Jeffrey Hugo wrote:
> > > On 6/21/2024 5:19 AM, Dmitry Baryshkov wrote:
> > > > On Fri, 21 Jun 2024 at 09:19, Bjorn Andersson <andersson@xxxxxxxxxx> wrote:
> > > > > 
> > > > > On Wed, Jun 12, 2024 at 09:28:39PM GMT, Dmitry Baryshkov wrote:
> > > > > > On Wed, Jun 12, 2024 at 12:17:28PM +0530, Ekansh Gupta wrote:
> > > > > > > Move fastrpc.c from misc/ to misc/fastrpc/. New C files are planned
> > > > > > > to be added for PD notifications and other missing features. Adding
> > > > > > > and maintaining new files from within fastrpc directory would be easy.
> > > > > > > 
> > > > > > > Example of feature that is being planned to be introduced in a new C
> > > > > > > file:
> > > > > > > https://lore.kernel.org/all/20240606165939.12950-6-quic_ekangupt@xxxxxxxxxxx/
> > > > > > > 
> > > > > > > Signed-off-by: Ekansh Gupta <quic_ekangupt@xxxxxxxxxxx>
> > > > > > > ---
> > > > > > >   MAINTAINERS                          |  2 +-
> > > > > > >   drivers/misc/Kconfig                 | 13 +------------
> > > > > > >   drivers/misc/Makefile                |  2 +-
> > > > > > >   drivers/misc/fastrpc/Kconfig         | 16 ++++++++++++++++
> > > > > > >   drivers/misc/fastrpc/Makefile        |  2 ++
> > > > > > >   drivers/misc/{ => fastrpc}/fastrpc.c |  0
> > > > > > >   6 files changed, 21 insertions(+), 14 deletions(-)
> > > > > > >   create mode 100644 drivers/misc/fastrpc/Kconfig
> > > > > > >   create mode 100644 drivers/misc/fastrpc/Makefile
> > > > > > >   rename drivers/misc/{ => fastrpc}/fastrpc.c (100%)
> > > > > > 
> > > > > > Please consider whether it makes sense to move to drivers/accel instead
> > > > > > (and possibly writing a better Kconfig entry, specifying that the driver
> > > > > > is to be used to offload execution to the DSP).
> > > > > > 
> > > > > 
> > > > > Wouldn't this come with the expectation of following the ABIs of
> > > > > drivers/accel and thereby breaking userspace?
> > > > 
> > > > As I wrote earlier, that depends on the accel/ maintainers decision,
> > > > whether it's acceptable to have non-DRM_ACCEL code underneath.
> > > > But at least I'd try doing that on the grounds of keeping the code at
> > > > the proper place in the drivers/ tree, raising awareness of the
> > > > FastRPC, etc.
> > > > For example current fastrpc driver bypasses dri-devel reviews, while
> > > > if I remember correctly, at some point it was suggested that all
> > > > dma-buf-handling drivers should also notify the dri-devel ML.
> 
> If the agreement is that dma-buf-handling drivers must get reviews from
> dri-devel, then let's document that in MAINTAINERS and agree with the
> maintainer.

Good idea.

> 
> There's no need to move the driver for that.

-- 
With best wishes
Dmitry



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