Re: [PATCH 2/8] drm/fb-helper: Add support for DRM_FORMAT_C[124]

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Hi Simon,

On Thu, Feb 17, 2022 at 5:18 PM Simon Ser <contact@xxxxxxxxxxx> wrote:
On Thursday, February 17th, 2022 at 17:12, Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
What is C0?

A non-existing color-indexed mode with zero colors ;-)
Introduced purely to make a check like in the comment below work.
What we really want to check here is if the mode is color-indexed
or not...

Maybe it would be worth introducing a drm_format_info_is_color_indexed
function? Would be self-describing when used, and would avoid to miss
some places to update when adding new color-indexed formats.

Yep, and a .is_color_indexed flag, cfr. the existing .is_yuv flag.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds



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