On Tuesday 13 January 2009, Frantisek Dufka wrote:
Siarhei Siamashka wrote:
XV should make a perfect backend for SDL, because it maps fine on SDL
API (SDL_SetVideoMode/SDL_Flip/...). In general, XV is a good backend
for anything that uses double-buffered or triple-buffered
Huang Gao (Gmail) wrote:
Dear all Maemo fans:
I just noticed that Maemo used a different mechanism in LCD
driver from normal FB drivers. It seemed that Maemo does not use the
automatic DMA refresh in the driver, which is replaced by an ioctl named
OMAPFB_UPDATE_WINDOW, and a
...@seznam.cz]
发送时间: 2009年1月13日 16:56
收件人: Huang Gao (Gmail)
抄送: maemo-developers@maemo.org
主题: Re: Does anyone know the mechanism in Nokia's LCD driver?
Huang Gao (Gmail) wrote:
Dear all Maemo fans:
I just noticed that Maemo used a different mechanism in LCD
driver from normal FB
Hi,
On Tue, 2009-01-13 at 17:21 +0800, ext Huang Gao (Gmail) wrote:
But I am still wondering why the screen will not flicker if the
DMA only refreshes when the data changed. Does Nokia uses something
like smart panel?
There is an external HW framebuffer between omap and the lcd
--
On Tue, Jan 13, 2009 at 10:56 AM, Frantisek Dufka duf...@seznam.cz wrote:
BTW, there is kernel ioctl to set automatic refresh and the refresh rate
can be tweaked in kernel source but the results are suboptimal. Maybe at
least for Nokia 770 it would be possible to use tearsync flag for such
Hi,
On Tue, 2009-01-13 at 18:06 +0800, ext Huang Gao (Gmail) wrote:
Hi, Igor Stoppa:
Thank you for your reply!
So can I understand that this hardware FB is not contained in SDRAM
or SRAM, and LCD will refresh itself from this hardware FB by its controller
automatically, without
On Tue, 2009-01-13 at 12:23 +0200, ext Felipe Contreras wrote:
On Tue, Jan 13, 2009 at 12:05 PM, Igor Stoppa igor.sto...@nokia.com wrote:
Hi,
On Tue, 2009-01-13 at 18:06 +0800, ext Huang Gao (Gmail) wrote:
Hi, Igor Stoppa:
Thank you for your reply!
So can I understand that
-
发件人: Igor Stoppa [mailto:igor.sto...@nokia.com]
发送时间: 2009年1月13日 17:21
收件人: ext Huang Gao (Gmail)
抄送: 'Frantisek Dufka'; maemo-developers@maemo.org
主题: RE: Does anyone know the mechanism in Nokia's LCD driver?
Hi,
On Tue, 2009-01-13 at 17:21 +0800, ext Huang Gao (Gmail) wrote:
But I am
On Tue, Jan 13, 2009 at 12:05 PM, Igor Stoppa igor.sto...@nokia.com wrote:
Hi,
On Tue, 2009-01-13 at 18:06 +0800, ext Huang Gao (Gmail) wrote:
Hi, Igor Stoppa:
Thank you for your reply!
So can I understand that this hardware FB is not contained in SDRAM
or SRAM, and LCD will
On Tue, Jan 13, 2009 at 12:23 PM, Felipe Contreras
felipe.contre...@gmail.com wrote:
On Tue, Jan 13, 2009 at 12:05 PM, Igor Stoppa igor.sto...@nokia.com wrote:
Hi,
On Tue, 2009-01-13 at 18:06 +0800, ext Huang Gao (Gmail) wrote:
Hi, Igor Stoppa:
Thank you for your reply!
So can I
know the mechanism in Nokia's LCD driver?
Igor Stoppa wrote:
Hi,
On Tue, 2009-01-13 at 18:06 +0800, ext Huang Gao (Gmail) wrote:
So can I understand that this hardware FB is not contained in SDRAM
or SRAM, and LCD will refresh itself from this hardware FB by its
controller
automatically
Would the manual mode help to avoid tearing?
Yes, and it does help to avoid tearing. At least this works fine for
XV extension. But getting tearfree scrolling/panning in GTK
applications for example is a bit more challenging. I can provide a
more detailed explanation if anybody is
Siarhei Siamashka wrote:
XV should make a perfect backend for SDL, because it maps fine on SDL
API (SDL_SetVideoMode/SDL_Flip/...). In general, XV is a good backend
for anything that uses double-buffered or triple-buffered
fullscreen/fullwindow blits. It is possible to get ~27.5 frames per
Dear all Maemo fans:
I just noticed that Maemo used a different mechanism in LCD driver
from normal FB drivers. It seemed that Maemo does not use the automatic DMA
refresh in the driver, which is replaced by an ioctl named
OMAPFB_UPDATE_WINDOW, and a method called TEARSYNC. However, I am
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