linux-kernel - Re: [PATCH RFC v9.5 09/20] drm/dsi: Add a helper to get bits per pixel of MIPI DSI pixel format

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Message-ID: <20150512133620.GA24939@ulmo.nvidia.com>
Date:	Tue, 12 May 2015 15:36:21 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Liu Ying <Ying.Liu@...escale.com>
Cc:	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux@....linux.org.uk,
	kernel@...gutronix.de, p.zabel@...gutronix.de,
	shawn.guo@...aro.org, mturquette@...aro.org, airlied@...ux.ie,
	andyshrk@...il.com, stefan.wahren@...e.com, a.hajda@...sung.com,
	sboyd@...eaurora.org, daniel.vetter@...ll.ch,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC v9.5 09/20] drm/dsi: Add a helper to get bits per
 pixel of MIPI DSI pixel format

On Fri, Feb 13, 2015 at 01:25:19PM +0800, Liu Ying wrote:
> Signed-off-by: Liu Ying <Ying.Liu@...escale.com>

This could use a commit message. Describe for example why this is useful
or when to use it.

> ---
> v9->v9.5:
>  * Add kernel-doc for the new helper function to address Daniel Vetter's
>    comment.
> 
> v8->v9:
>  * Rebase onto the imx-drm/next branch of Philipp Zabel's open git repository.
> 
> v7->v8:
>  * None.
> 
> v6->v7:
>  * None.
> 
> v5->v6:
>  * Address the over 80 characters in one line warning reported by the
>    checkpatch.pl script.
> 
> v4->v5:
>  * None.
> 
> v3->v4:
>  * None.
> 
> v2->v3:
>  * None.
> 
> v1->v2:
>  * Thierry Reding suggested that the mipi_dsi_pixel_format_to_bpp() function
>    could be placed at the common DRM MIPI DSI driver.
>    This patch is newly added.
> 
>  include/drm/drm_mipi_dsi.h | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h
> index f1d8d0d..cabc910 100644
> --- a/include/drm/drm_mipi_dsi.h
> +++ b/include/drm/drm_mipi_dsi.h
> @@ -163,6 +163,28 @@ static inline struct mipi_dsi_device *to_mipi_dsi_device(struct device *dev)
>  	return container_of(dev, struct mipi_dsi_device, dev);
>  }
>  
> +/**
> + * mipi_dsi_pixel_format_to_bpp() - get bits per pixel for a mipi dsi
> + *    pixel format
> + * @fmt: mipi dsi pixel format
> + *
> + * Return: The bits per pixel value for the mipi dsi pixel format on success or
> + *    a negative error code on failure.
> + */

s/mipi dsi/MIPI DSI/, please.

Thierry

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