# Re: \[PATCH\] drm: expand cea861 mode timing table

- From: Thierry Reding \<hidden\>
- Date: 2016-05-13 15:28:44 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2016/05/9097380
- Thread: https://ratatoskr.run/linux-fbdev/2016/05/9097360/t.md

```text
On Thu, May 12, 2016 at 03:37:33PM -0400, Eric Yang wrote:
[...]
> diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
> index e974420..edbb4fc 100644
> --- a/include/linux/hdmi.h
> +++ b/include/linux/hdmi.h
> @@ -78,6 +78,8 @@ enum hdmi_picture_aspect {
>  	HDMI_PICTURE_ASPECT_NONE,
>  	HDMI_PICTURE_ASPECT_4_3,
>  	HDMI_PICTURE_ASPECT_16_9,
> +	HDMI_PICTURE_ASPECT_64_27,
> +	HDMI_PICTURE_ASPECT_256_135,
>  	HDMI_PICTURE_ASPECT_RESERVED,
>  };

Where did you get these from? I'm asking because I sent this patch last
year (or at least I wrote it and we discussed it on IRC, since I can't
find an email archive link to it), and back at the time the picture
aspect ratio was the big question mark. My recollection is that
CEA-861-F introduces these new picture aspect ratios in the mode tables
but never specifies their values. As a matter of fact, the AVI infoframe
where these values are used only has space for 4 values (none, 4:3, 16:9
and reserved).

Would you mind pointing me at the specification for these values?

Thanks,
Thierry
```

## Attachments

- [signature.asc](https://ratatoskr.run/linux-fbdev/2016/05/9097380/attachment/0) (application/pgp-signature, 819 bytes)