[PATCH] drm: check drm_format_info hsub and vsub to avoid divide by zero

[George Kennedy]

On 10/29/2021 10:14 AM, Brian Starkey wrote:
> Hi,
>
> On Fri, Oct 29, 2021 at 09:15:28AM -0400, George Kennedy wrote:
>> Asking if you have any input on how to deal with hsub and vsub = zero?
> That's just a straight mistake on those formats - they should
> be 1. My bad for not spotting it in review.
>
> On the one hand, having formats in this table is a nice
> machine-readable way to describe them. On the other, as drm_fourcc is
> being used as the canonical repository for formats, including ones
> not used in DRM, we can end up with situations like this.
> (R10/R12 being another example of formats not used in DRM:
> 20211027233140.12268-1-laurent.pinchart at ideasonboard.com)

Wondering if there is an alternate fix to the one proposed?

Thank you,
George
>
> Thanks,
> -Brian