Hi
Am 20.08.24 um 12:39 schrieb Sui Jingfeng:
Besides, a lot of DRM driver instances has the DMA/2D acceleration
hardware, promote it
into drm_driver structure may has the potential to utilize hardware
acceleration. Drivers
will more easily to have custom implementation. I'm not 100% sure if
it will only be used
by i915 in the future.
The correct place to do acceleration would be in the blit helpers in
drm_format_helper.c. But no one bothered so far. For fbdev-only
acceleration, DRM drivers could have custom fb_ops for accelerated
drawing, copying, etc. Few cared and almost all removed that code at
some point. The latest consent was that the complexity of the
implementation outweights the performance gains. Even the few devs who
actually asked for it didn't bother in the end.
Best regards
Thomas
Best regards,
Sui
--
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Frankenstrasse 146, 90461 Nuernberg, Germany
GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman
HRB 36809 (AG Nuernberg)
