[linux-sunxi] Re: [U-Boot] [PATCH v4 0/3] Allwinner DE2 HDMI SimpleFB support
在 2017-09-15 21:35,Maxime Ripard 写道: On Fri, Sep 15, 2017 at 02:25:12PM +0100, Peter Robinson wrote: On Fri, Sep 15, 2017 at 2:59 AM, Icenowy Zhengwrote: > This patchset is for Allwinner DE2 HDMI SimpleFB support. > > The framebuffer initialized by the Allwinner DE2 driver can be > passed by to the kernel as simplefb, and this can enable the > kernel to display graphics without having full DE2 driver. > > Add the suppot of simplefb in DE2 code. > > The code to find a simplefb with sunxi extension and a suitable > pipeline is extracted to a new source file in video/sunxi/. > > An option is added for device tree simplefb, and furtherly > other simplefb support code should also be converted to it. There was a generic simplefb driver recently added [1], is it worth basing it on that? [1] https://lists.denx.de/pipermail/u-boot/2017-September/306273.html This is a simplefb "client", it uses a display that has already been initialized. What Icenowy is working on is a "provider", ie it initializes the display in order for other components to reuse it (Linux). As I know, now FreeBSD and NetBSD are also going to use the simplefb. Maxime -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[linux-sunxi] Re: [U-Boot] [PATCH v4 0/3] Allwinner DE2 HDMI SimpleFB support
On Fri, Sep 15, 2017 at 02:25:12PM +0100, Peter Robinson wrote: > On Fri, Sep 15, 2017 at 2:59 AM, Icenowy Zhengwrote: > > This patchset is for Allwinner DE2 HDMI SimpleFB support. > > > > The framebuffer initialized by the Allwinner DE2 driver can be > > passed by to the kernel as simplefb, and this can enable the > > kernel to display graphics without having full DE2 driver. > > > > Add the suppot of simplefb in DE2 code. > > > > The code to find a simplefb with sunxi extension and a suitable > > pipeline is extracted to a new source file in video/sunxi/. > > > > An option is added for device tree simplefb, and furtherly > > other simplefb support code should also be converted to it. > > There was a generic simplefb driver recently added [1], is it worth > basing it on that? > > [1] https://lists.denx.de/pipermail/u-boot/2017-September/306273.html This is a simplefb "client", it uses a display that has already been initialized. What Icenowy is working on is a "provider", ie it initializes the display in order for other components to reuse it (Linux). Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout. signature.asc Description: PGP signature
[linux-sunxi] Re: [U-Boot] [PATCH v4 0/3] Allwinner DE2 HDMI SimpleFB support
On Fri, Sep 15, 2017 at 2:59 AM, Icenowy Zhengwrote: > This patchset is for Allwinner DE2 HDMI SimpleFB support. > > The framebuffer initialized by the Allwinner DE2 driver can be > passed by to the kernel as simplefb, and this can enable the > kernel to display graphics without having full DE2 driver. > > Add the suppot of simplefb in DE2 code. > > The code to find a simplefb with sunxi extension and a suitable > pipeline is extracted to a new source file in video/sunxi/. > > An option is added for device tree simplefb, and furtherly > other simplefb support code should also be converted to it. There was a generic simplefb driver recently added [1], is it worth basing it on that? [1] https://lists.denx.de/pipermail/u-boot/2017-September/306273.html -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.