linux-kernel - Re: [RFC PATCH] video: Use fb_sys_write rather than open-coding in drivers

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Date:	Tue, 11 Feb 2014 16:06:15 +0200
From:	Tomi Valkeinen <tomi.valkeinen@...com>
To:	Ryan Mallon <rmallon@...il.com>
CC:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	"linux-fbdev@...r.kernel.org" <linux-fbdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] video: Use fb_sys_write rather than open-coding in
 drivers

On 20/09/13 10:06, Ryan Mallon wrote:
> Several video drivers open code the fb_write write function with code
> which is very similar to fb_sys_write. Replace the open code versions
> with calls to fb_sys_write. An fb_sync callback is added to each of
> the drivers.
>     
> Signed-off-by: Ryan Mallon <rmallon@...il.com>
> ---

Doesn't this change the behavior so that fb_write does no longer update
the display, but fb_sync does? I don't think fb_sync is even meant to
update the display, it's meant to wait for an update to finish. Then
again, I'm not sure about that, all I see in fb.h is "wait for blit
idle, optional"

 Tomi



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