linux-kernel - Re: [PATCH v2] drm/format-helper: Make conversion_buf

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Date:   Thu, 16 Mar 2023 23:29:59 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-kernel@...r.kernel.org,
        Arthur Grillo <arthurgrillo@...eup.net>,
        Maíra Canal <mairacanal@...eup.net>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Maxime Ripard <maxime@...no.tech>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        David Gow <davidgow@...gle.com>,
        José Expósito <jose.exposito89@...il.com>,
        dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v2] drm/format-helper: Make conversion_buf_size()
 support sub-byte pixel fmts

Geert Uytterhoeven <geert@...ux-m68k.org> writes:

Hello Geert,

[...]

>> +       if (!dst_pitch) {
>> +               bpp = drm_format_info_bpp(dst_fi, 0);
>> +               dst_pitch = DIV_ROUND_UP(drm_rect_width(clip) * bpp, 8);
>
> I know I'm a bit late to the party,  but here's actually a helper for that:
>
>     dst_pitch = drm_format_info_min_pitch(info, 0, drm_rect_width(clip));
>

Nice, I didn't notice this. I'll send a follow-up patch. Thanks!

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat