Re: [PATCH v7 0/7] drm/lsdc: add drm driver for loongson display controller

[Sui Jingfeng <15330273260@189.cn>]

On 2022/2/14 13:54, Jiaxun Yang wrote:
>
>
> 在 2022/2/13 14:16, Sui Jingfeng 写道:
>> There is a display controller in loongson's LS2K1000 SoC and LS7A1000
>> bridge chip, the DC is a PCI device in those chips. It has two display
>> pipes but with only one hardware cursor. Each way has a DVO interface
>> which provide RGB888 signals, vertical & horizontal synchronisations,
>> data enable and the pixel clock. Each CRTC is able to scanout from
>> 1920x1080 resolution at 60Hz. The maxmium resolution is 2048x2048
>> according to the hardware spec.
>
> Hi Jiangfeng,
>
> I see you added dts for those boards, but I didn't see you wire up them
> in Makefile and code? How can you use them in present systems?
>
> I guess to make those dts work for general all-in-one kernel, what you
> need to do is, for example Lemota A1901:
>
> 1. Add __dtb_lemote_a1901 to builtin_dtbs.h
>
> 2. Wire up with something like:
>
> if (!strcmp("LEMOTE-/LS3A4000/-7A1000-1w-V01-pc", eboard->name)
>     loongson_fdt_blob = __dtb_lemote_a1901
>
> In arch/mips/loongson64/env.c.
>
> Thanks.
> - Jiaxun

For most board, this driver is ready to be use out of box.
Device tree is for supplement purpose.