linux-kernel - Re: [PATCH v4 0/4] drm: Cleanup probe function for component based masters.

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Date:	Tue, 20 Oct 2015 12:02:33 +0200
From:	Daniel Vetter <daniel@...ll.ch>
To:	Liviu Dudau <Liviu.Dudau@....com>
Cc:	David Airlie <airlied@...ux.ie>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Mark Yao <mark.yao@...k-chips.com>,
	Heiko Stuebner <heiko@...ech.de>,
	Russell King <rmk+kernel@....linux.org.uk>,
	dri-devel <dri-devel@...ts.freedesktop.org>,
	linux-rockchip <linux-rockchip@...ts.infradead.org>,
	LAKML <linux-arm-kernel@...ts.infradead.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 0/4] drm: Cleanup probe function for component based
 masters.

On Tue, Oct 20, 2015 at 10:23:11AM +0100, Liviu Dudau wrote:
> Changelog:
> v4: Fixed a bug where the wrong pointer was sent to component_match_add() and
>     component_master_add_with_match() in the armada_drv.c file that was flagged
>     by kbuild test robot. Dropped the RFC tag and added Acked-bys received from
>     Russell King.
> v3: Removed the call to dma_set_coherent_mask() from the generic
>     drm_of_component_probe(). Also changes to shorten lines over 80 chars long.
> v2: Rebased the patchset on top of drm-next rather than Linus' latest -rc
> 
> A few drivers in drivers/gpu/drm are component-enabled and use quite similar
> code sequences to probe for their encoder slaves at the remote end of the ports.
> Move the code into a "generic" function and remove it from the drivers.
> 
> The end results is that drivers get a reference count fix (imx), more thorough
> error checking (imx again) plus a decrease in the overall count of LoC.
> 
> I'm looking for comments and testing of the patchset (only compile tested from my
> end as I don't have access to all the devices touched by the changes). My main
> interest is in finding out if -EINVAL is the correct code to return if
> dev->of_node == NULL (handy now, as it is different from the other possible error
> codes and used in armada to trigger old platform_data support. Also looking for
> thoughts on the correctness of the patch and if it possible to co-opt more drivers
> into using the function.

Merged all four to drm-misc, thanks.
-Daniel

> 
> Best regards,
> Liviu
> 
> Liviu Dudau (4):
>   drm: Introduce generic probe function for component based masters.
>   drm/imx: Convert the probe function to the generic drm_of_component_probe()
>   drm/rockchip: Convert the probe function to the generic drm_of_component_probe()
>   drm/armada: Convert the probe function to the generic drm_of_component_probe()
> 
>  drivers/gpu/drm/armada/armada_drv.c         | 68 +++++++---------------
>  drivers/gpu/drm/drm_of.c                    | 88 +++++++++++++++++++++++++++++
>  drivers/gpu/drm/imx/imx-drm-core.c          | 55 ++----------------
>  drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 81 ++------------------------
>  include/drm/drm_of.h                        | 13 +++++
>  5 files changed, 130 insertions(+), 175 deletions(-)
> 
> -- 
> 2.6.0
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
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