linux-kernel - Re: [PATCH] drm/fsl-dcu: add COMMON

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Date:	Mon, 02 May 2016 14:22:04 -0700
From:	Stefan Agner <stefan@...er.ch>
To:	Arnd Bergmann <arnd@...db.de>, David Airlie <airlied@...ux.ie>
Cc:	Alison Wang <alison.wang@...escale.com>,
	David Airlie <airlied@...ux.ie>,
	linux-arm-kernel@...ts.infradead.org,
	dri-devel@...ts.freedesktop.org,
	Xiubo Li <lixiubo@...s.chinamobile.com>,
	Daniel Vetter <daniel.vetter@...ll.ch>,
	Jianwei Wang <jianwei.wang.chn@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/fsl-dcu: add COMMON_CLK dependency

On 2016-05-02 04:00, Arnd Bergmann wrote:
> The fsl dcu now uses the clk-provider interfaces, which are not available
> when CONFIG_COMMON_CLK is disabled:
> 
> drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c: In function 'fsl_dcu_drm_probe':
> drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c:362:20: error: implicit
> declaration of function '__clk_get_name'
> [-Werror=implicit-function-declaration]
>   pix_clk_in_name = __clk_get_name(pix_clk_in);
> 
> This adds a Kconfig dependency to prevent the driver from being enabled
> in this case.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 2d701449bce1 ("drm/fsl-dcu: use common clock framework for
> pixel clock divider")

Oh right, thx!

Acked-by: Stefan Agner <stefan@...er.ch>

@Dave, can you pick that up directly or do you prefer a pull request?

--
Stefan

> ---
>  drivers/gpu/drm/fsl-dcu/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/fsl-dcu/Kconfig b/drivers/gpu/drm/fsl-dcu/Kconfig
> index c78cf3f605d0..b9c714de6e40 100644
> --- a/drivers/gpu/drm/fsl-dcu/Kconfig
> +++ b/drivers/gpu/drm/fsl-dcu/Kconfig
> @@ -1,6 +1,6 @@
>  config DRM_FSL_DCU
>  	tristate "DRM Support for Freescale DCU"
> -	depends on DRM && OF && ARM
> +	depends on DRM && OF && ARM && COMMON_CLK
>  	select BACKLIGHT_CLASS_DEVICE
>  	select BACKLIGHT_LCD_SUPPORT
>  	select DRM_KMS_HELPER