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

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Date:   Fri, 10 Mar 2023 12:46:27 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     linux-kernel@...r.kernel.org
Cc:     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

Javier Martinez Canillas <javierm@...hat.com> writes:

> There are DRM fourcc formats that have pixels smaller than a byte, but the
> conversion_buf_size() function assumes that pixels are a multiple of bytes
> and use the struct drm_format_info .cpp field to calculate the dst_pitch.
>
> Instead, calculate it by using the bits per pixel (bpp) and divide it by 8
> to account for formats that have sub-byte pixels.
>
> Signed-off-by: Javier Martinez Canillas <javierm@...hat.com>
> ---

Pushed to drm-misc (drm-misc-next). Thanks!

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat