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From: Helge Deller <deller@gmx.de>
To: Hamza Mahfooz <someguy@effective-light.com>,
	Thomas Zimmermann <tzimmermann@suse.de>,
	linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org,
	Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Sven Schnelle <svens@stackframe.org>
Subject: Re: fbdev: Garbage collect fbdev scrolling acceleration
Date: Thu, 13 Jan 2022 17:36:22 +0100	[thread overview]
Message-ID: <feea8303-2b83-fc36-972c-4fc8ad723bde@gmx.de> (raw)

I may have missed some discussions, but I'm objecting against this patch:

	b3ec8cdf457e5 ("fbdev: Garbage collect fbdev scrolling acceleration, part 1 (from TODO list)")

Can we please (partly) revert it and restore the scrolling behaviour,
where fbcon uses fb_copyarea() to copy the screen contents instead of
redrawing the whole screen?

I'm fine with dropping the ypan-functionality.

Maybe on fast new x86 boxes the performance difference isn't huge,
but for all old systems, or when emulated in qemu, this makes
a big difference.

Helge

             reply	other threads:[~2022-01-13 16:37 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-01-13 16:36 Helge Deller [this message]
2022-01-13 21:46 ` fbdev: Garbage collect fbdev scrolling acceleration Sven Schnelle
2022-01-13 21:46   ` Sven Schnelle
2022-01-19 15:39   ` Daniel Vetter
2022-01-19 15:39     ` Daniel Vetter
2022-01-19 16:15     ` Sven Schnelle
2022-01-19 16:15       ` Sven Schnelle
2022-01-19 16:21       ` Daniel Vetter
2022-01-19 16:21         ` Daniel Vetter
2022-01-19 16:33         ` Sven Schnelle
2022-01-19 16:33           ` Sven Schnelle
2022-01-24 18:27     ` Geert Uytterhoeven
2022-01-24 18:27       ` Geert Uytterhoeven
2022-01-24 19:58       ` Daniel Vetter
2022-01-24 19:58         ` Daniel Vetter

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