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Re: [PATCH V2 12/16] drm/radeon: Make radeon card usable for Loongson.

To: Huacai Chen <chenhuacai@gmail.com>
Subject: Re: [PATCH V2 12/16] drm/radeon: Make radeon card usable for Loongson.
From: Michel Dänzer <michel@daenzer.net>
Date: Tue, 19 Jun 2012 09:56:45 +0200
Cc: Ralf Baechle <ralf@linux-mips.org>, linux-mips@linux-mips.org, Zhangjin Wu <wuzhangjin@gmail.com>, Hua Yan <yanh@lemote.com>, Fuxin Zhang <zhangfx@lemote.com>, dri-devel@lists.freedesktop.org, Hongliang Tao <taohl@lemote.com>, Huacai Chen <chenhc@lemote.com>
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On Die, 2012-06-19 at 14:50 +0800, Huacai Chen wrote: 
> 1, Use 32-bit DMA as a workaround (Loongson has a hardware bug that it
>    doesn't support DMA address above 4GB).
> 2, Read vga bios offered by system firmware.
> 3, Handle io prot correctly for MIPS.
> 4, Don't use swiotlb on Loongson machines (when use swiotlb, GPU reset
>    occurs at resume from suspend).

Sounds like this should be split up into smaller patches.


> diff --git a/include/drm/drm_sarea.h b/include/drm/drm_sarea.h
> index ee5389d..1d1a858 100644
> --- a/include/drm/drm_sarea.h
> +++ b/include/drm/drm_sarea.h
> @@ -37,6 +37,8 @@
>  /* SAREA area needs to be at least a page */
>  #if defined(__alpha__)
>  #define SAREA_MAX                       0x2000U
> +#elif defined(__mips__)
> +#define SAREA_MAX                       0x4000U
>  #elif defined(__ia64__)
>  #define SAREA_MAX                       0x10000U     /* 64kB */
>  #else

Also, this change doesn't seem to be accounted for in the commit log.


-- 
Earthling Michel Dänzer           |                   http://www.amd.com
Libre software enthusiast         |          Debian, X and DRI developer

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