From: Paul Mundt <lethal@linux-sh.org>
To: linux-fbdev-devel@lists.sourceforge.net
Cc: adaplas@pol.net
Subject: Re: Re: [PATCH][RFC] Add support for Epson S1D13806 FB
Date: Mon, 14 Mar 2005 16:35:09 +0200 [thread overview]
Message-ID: <20050314143509.GD2695@linux-sh.org> (raw)
In-Reply-To: <200503142207.57074.adaplas@hotpop.com>
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On Mon, Mar 14, 2005 at 10:10:35PM +0800, Antonino A. Daplas wrote:
> BTW, I would guess that scrolling is slow in this driver. Since this driver
> can do pan_display, If this:
>
> info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
>
> is added somewhere before register_framebuffer(), and var->xres_virtual >
> var->xres, you might get a several-fold increase in scrolling speed (since
> scrolling mode will be SCROLL_PAN_REDRAW instead of SCROLL_REDRAW).
>
This is interesting. When FBINFO_HWACCEL_YPAN was added to hitfb, it slowed
down scrolling by several orders of magnitude. Perhaps it was something
relating to how the pan_display was implemented, but it's definitely not
a general win for everyone..
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next prev parent reply other threads:[~2005-03-14 14:35 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-14 10:13 [PATCH][RFC] Add support for Epson S1D13806 FB Thibaut VARENE
2005-03-14 12:15 ` Antonino A. Daplas
2005-03-14 13:00 ` Thibaut VARENE
2005-03-14 13:13 ` Antonino A. Daplas
2005-03-14 14:10 ` Antonino A. Daplas
2005-03-14 14:24 ` Thibaut VARENE
2005-03-14 15:06 ` Antonino A. Daplas
2005-03-14 14:35 ` Paul Mundt [this message]
2005-03-14 15:06 ` Antonino A. Daplas
2005-03-15 7:17 ` Paul Mundt
2005-03-15 10:26 ` Antonino A. Daplas
2005-03-14 15:18 ` Antonino A. Daplas
2005-03-14 13:18 ` Paul Mundt
2005-03-14 13:25 ` Geert Uytterhoeven
2005-03-14 13:34 ` Thibaut VARENE
2005-03-14 13:53 ` Antonino A. Daplas
2005-03-14 14:09 ` Thibaut VARENE
2005-03-14 14:12 ` Thibaut VARENE
2005-03-14 13:44 ` Paul Mundt
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