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

[Jani Nikula]

I guess this fell between the cracks.

Reviewed-by: Jani Nikula <jani.nikula at intel.com>


On Fri, 13 Feb 2015, Liu Ying <Ying.Liu at freescale.com> wrote:
> Signed-off-by: Liu Ying <Ying.Liu at freescale.com>
> ---
> 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.
> + */
> +static inline int mipi_dsi_pixel_format_to_bpp(enum mipi_dsi_pixel_format fmt)
> +{
> +	switch (fmt) {
> +	case MIPI_DSI_FMT_RGB888:
> +	case MIPI_DSI_FMT_RGB666:
> +		return 24;
> +	case MIPI_DSI_FMT_RGB666_PACKED:
> +		return 18;
> +	case MIPI_DSI_FMT_RGB565:
> +		return 16;
> +	}
> +	return -EINVAL;
> +}
> +
>  struct mipi_dsi_device *of_find_mipi_dsi_device_by_node(struct device_node *np);
>  int mipi_dsi_attach(struct mipi_dsi_device *dsi);
>  int mipi_dsi_detach(struct mipi_dsi_device *dsi);
> -- 
> 2.1.0
>
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-- 
Jani Nikula, Intel Open Source Technology Center