Re: [PATCH v14 0/3] Add drm driver for Rockchip Socs
From: Arnd Bergmann
Date: Thu Nov 27 2014 - 16:57:33 EST
On Thursday 27 November 2014 14:05:00 Daniel Kurtz wrote:
> On Thu, Nov 27, 2014 at 2:08 AM, Mark yao <mark.yao@xxxxxxxxxxxxxx> wrote:
> > On 2014å11æ27æ 10:12, Dave Airlie wrote:
> >>> Hi Dave
> >>> Do you mean that I need send you a branch, based on drm-next, merge with
> >>> iommu tree and rockchip drm?
> >> Yes, grab drm-next, git pull the arm/rockchip branch from Joerg's
> >> tree, put rockchip drm
> >> patches on top, send me pull request.
> >> I'll validate it then.
> >> Dave.
> > Hi Dave
> > I have send a pull request to you, with Joerg's iommu arm/rockchip branch.
> > I got a same problem when use "make multi_v7_defconfig" as Heiko said:
> > drivers/video/fbdev/Kconfig:5:error: recursive dependency detected!
> > drivers/video/fbdev/Kconfig:5: symbol FB is selected by DRM_KMS_FB_HELPER
> > drivers/gpu/drm/Kconfig:34: symbol DRM_KMS_FB_HELPER is selected by DRM_ROCKCHIP
> > drivers/gpu/drm/rockchip/Kconfig:1: symbol DRM_ROCKCHIP depends on ARM_DMA_USE_IOMMU
> > arch/arm/Kconfig:95: symbol ARM_DMA_USE_IOMMU is selected by VIDEO_OMAP3
> > drivers/media/platform/Kconfig:96: symbol VIDEO_OMAP3 depends on VIDEO_V4L2
> > drivers/media/v4l2-core/Kconfig:6: symbol VIDEO_V4L2 depends on I2C
> > drivers/i2c/Kconfig:7: symbol I2C is selected by FB_DDC
> > drivers/video/fbdev/Kconfig:59: symbol FB_DDC is selected by FB_CYBER2000_DDC
> > drivers/video/fbdev/Kconfig:374: symbol FB_CYBER2000_DDC depends on FB_CYBER2000
> > drivers/video/fbdev/Kconfig:362: symbol FB_CYBER2000 depends on FB
> > I was confused how to solve the recursive dependency, remove depends on ARM_DMA_USE_IOMMU & IOMMU_API?
> The "depends on ARM_DMA_USE_IOMMU & IOMMU_API" was suggested by Arnd
> Bergmann during code review (originally they were selected).
> Removing them definitely fixes the dependency recursion.
> Also, since they are both already selected by ROCKCHIP_IOMMU,
> everything will build correctly.
> So, this sounds good to me, but I am no expert on Kconfig.
I think the problem here is VIDEO_OMAP3 (among others), it should do the
same as rockchips and use 'depends on' instead of 'select'.
Another problem is the 'select I2C' in FB_DDC, but that would be much harder
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