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Date: Mon, 14 Aug 2017 15:50:56 +0200 From: Michal Simek <michal.simek@...inx.com> To: Daniel Vetter <daniel.vetter@...ll.ch>, Michal Simek <michal.simek@...inx.com> CC: Linus Walleij <linus.walleij@...aro.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "monstr@...str.eu" <monstr@...str.eu>, Benjamin Gaignard <benjamin.gaignard@...aro.org>, Tomi Valkeinen <tomi.valkeinen@...com>, Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>, Arnd Bergmann <arnd@...db.de>, "linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>, Krzysztof Kozlowski <krzk@...nel.org>, Paul Burton <paul.burton@...tec.com> Subject: Re: [PATCH 2/2] video: fbdev: Enable Xilinx FB for ZynqMP On 14.8.2017 15:49, Daniel Vetter wrote: > On Mon, Aug 14, 2017 at 3:46 PM, Michal Simek <michal.simek@...inx.com> wrote: >> On 14.8.2017 15:42, Linus Walleij wrote: >>> On Tue, Aug 8, 2017 at 10:10 AM, Michal Simek <michal.simek@...inx.com> wrote: >>> >>>> Enable this driver for Xilinx ZynqMP. >>>> >>>> Signed-off-by: Michal Simek <michal.simek@...inx.com> >>> >>> Not a comment on the patch per se, but I would advice you to look into >>> migrating the Xilinx frame buffer to DRI/DRM/KMS. >>> >>> The recent CMA helpers has made it very simple and focused to write >>> DRM drivers. See for example drivers/gpu/drm/pl111 >> >> There is a lot of work done by xilinx in this area gpu/drm/kms. I am >> trying to upstream what xilinx has in soc tree and this change is there. >> Maybe in this case it is useless and none is using it but it is there >> and I don't want to break user. There shouldn't be any technical problem >> to run this old fb driver in pl on arm64. > > A proper drm kms driver gives you backwards compat for fbdev for free. > And we're taking in patches to fill feature gaps in our fbdev > emulation as people hit them. There no reason nowadays at all to merge > new fbdev native drivers, your users will be taken care of by a drm > kms driver fully. You can look at xilinx work in this area. https://github.com/Xilinx/linux-xlnx Unfortunately they haven't started to upstream it. In this particular case I am not aware about anybody who is going to write new driver for this soft IP. Thanks, Michal
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