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Date: Fri, 17 Feb 2017 13:20:55 +0000 From: Emil Velikov <emil.l.velikov@...il.com> To: Tobias Jakobi <tjakobi@...h.uni-bielefeld.de> Cc: Maxime Ripard <maxime.ripard@...e-electrons.com>, Mark Rutland <mark.rutland@....com>, Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>, devicetree <devicetree@...r.kernel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-kernel <linux-kernel@...r.kernel.org>, ML dri-devel <dri-devel@...ts.freedesktop.org>, linux-mm@...ck.org, Chen-Yu Tsai <wens@...e.org>, Rob Herring <robh+dt@...nel.org>, LAKML <linux-arm-kernel@...ts.infradead.org> Subject: Re: [PATCH 0/8] ARM: sun8i: a33: Mali improvements On 17 February 2017 at 12:45, Tobias Jakobi <tjakobi@...h.uni-bielefeld.de> wrote: > Hello Maxime, > > Maxime Ripard wrote: >> Hi, >> >> On Thu, Feb 16, 2017 at 01:43:06PM +0100, Tobias Jakobi wrote: >>> I was wondering about the following. Wasn't there some strict >>> requirement about code going upstream, which also included that there >>> was a full open-source driver stack for it? >>> >>> I don't see how this is the case for Mali, neither in the kernel, nor in >>> userspace. I'm aware that the Mali kernel driver is open-source. But it >>> is not upstream, maintained out of tree, and won't land upstream in its >>> current form (no resemblence to a DRM driver at all). And let's not talk >>> about the userspace part. >>> >>> So, why should this be here? >> >> The device tree is a representation of the hardware itself. The state >> of the driver support doesn't change the hardware you're running on, >> just like your BIOS/UEFI on x86 won't change the device it reports to >> Linux based on whether it has a driver for it. > Like Emil already said, the new bindings and the DT entries are solely > introduced to support a proprietary out-of-tree module. > > The current workflow when introducing new DT entries is the following: > - upstream a driver that uses the entries > - THEN add the new entries > That's the ideal route that I was thinking of. At the same time, if prominent DRM people believe that we can/should turn a blind eye, so be it. I'm not trying to make Maxime's life hard, but point out that things feel iffy IMHO. Thanks Emil
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