drm/fb-helper: Calculate damaged area in separate helper

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Add drm_fb_helper_memory_range_to_clip(), a helper function that
accepts an linear range of video memory and converts it into a
rectangle. The computed rectangle describes the damaged area in
terms of scanlines and pixels per scanline.

While at it, make the code more readable by using struct drm_rect
and related helpers.

The code was previously part of the deferred I/O helpers, but is
also useful for damage handling of regular write operations. Update
the deferred I/O code to use the new function.

v2:
	* rename helper (Javier)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220209161617.3553-4-tzimmermann@suse.de

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This commit is contained in:

Thomas Zimmermann 2022-02-09 17:16:15 +01:00

parent aa15c677cc

commit 67b723f5b7

1 changed files with 20 additions and 6 deletions

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drivers/gpu/drm/drm_fb_helper.c

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