OESF | ELSI | pdaXrom | OpenZaurus | Zaurus Themes | Community Links | Ibiblio

IPB

Welcome Guest ( Log In | Register )

> The 2.6.23 Kernel, any success stories?
Dromede
post Oct 23 2007, 04:55 AM
Post #1





Group: Members
Posts: 156
Joined: 10-December 06
From: Croatia
Member No.: 13,288



So, has anyone tried to compile the latest kernel for our Z's?
Go to the top of the page
 
+Quote Post
 
Start new topic
Replies
Dromede
post Oct 24 2007, 11:06 AM
Post #2





Group: Members
Posts: 156
Joined: 10-December 06
From: Croatia
Member No.: 13,288



IMHO in comparison, the only thing that's better on 2.4 kernels is this thing called BVDD. it's somekind of a display driver and it seems that nobody knows where it came from, what exactly it is or who made it (please DO correct me if i'm wrong about this). the 2.6 series have no video acceleration for the pxa270 series of processors that i know of. the pxa270 has 256kb of SRAM inside it that is not used by the 2.6 series. at least it ain't used yet. the problem with it is that you can't fit the whole screen of the Z inside the SRAM (in it's native resolution - 640x480). you can fit about half of that inside that tiny SRAM.
as for your c860, there is a library for 2.6 series that handles the ati w100 chip.
Go to the top of the page
 
+Quote Post
koen
post Oct 24 2007, 12:45 PM
Post #3





Group: Members
Posts: 1,014
Joined: 4-January 05
From: Enschede, The Netherlands
Member No.: 6,107



QUOTE(Dromede @ Oct 24 2007, 07:06 PM) *
IMHO in comparison, the only thing that's better on 2.4 kernels is this thing called BVDD. it's somekind of a display driver and it seems that nobody knows where it came from, what exactly it is or who made it (please DO correct me if i'm wrong about this).


You're wrong, see below

QUOTE
the 2.6 series have no video acceleration for the pxa270 series of processors that i know of.


The kernels in OE have a patch that enables the acceleration bit (the colourspace conversion and scaling using overlays.

QUOTE
the pxa270 has 256kb of SRAM inside it that is not used by the 2.6 series. at least it ain't used yet. the problem with it is that you can't fit the whole screen of the Z inside the SRAM (in it's native resolution - 640x480). you can fit about half of that inside that tiny SRAM.


The SRAM bit is not really acceleration in the video jargon, it just makes blitting faster, it does not take away processing for the cpu like the overlay does. You can fit a 640x480 overlay into with with some tricks, like splitting the Y U and V planes. There are patches available for 2.6 to make the SRAM mappable, but they are all pretty much for ancient (e.g. 2.6.11) kernels or broken. For playing videos fast enough the overlay bit is enough, the sram thing comes in usefull for heavy SDL stuff like games. BVDD is the combination of overlay and placing a 320x480 or partial 640x480 framebuffer in SRAM.

QUOTE
as for your c860, there is a library for 2.6 series that handles the ati w100 chip.


In angstrom you don't need that lib, the xserver just exposes a proper Xv interface and we have a prototype of Xv + XvMC working for c7x0 series. That means that media players Just Work™ instead of needing patches to support libaticore or libw100. If you dislike X we have an mplayer that uses libw100 as well.

Go to the top of the page
 
+Quote Post

Posts in this topic
Dromede   The 2.6.23 Kernel   Oct 23 2007, 04:55 AM
InSearchOf   Working with it now on pdaXrom... Success yes, 100...   Oct 23 2007, 04:57 AM
koen   The 2.6.23 kernel for zaurus machines in OE builds...   Oct 23 2007, 05:15 AM
Meanie   QUOTE(koen @ Oct 23 2007, 11:15 PM) The 2...   Oct 23 2007, 03:47 PM
speculatrix   QUOTE(koen @ Oct 23 2007, 02:15 PM) The 2...   Oct 24 2007, 03:37 AM
Dromede   i had some partial success too. the power button a...   Oct 23 2007, 06:03 AM
koen   Read what I posted above.   Oct 23 2007, 07:00 AM
tovarish   what doesnt work in the 2.6 kernels. i used the sh...   Oct 24 2007, 09:16 AM
Dromede   IMHO in comparison, the only thing that's bett...   Oct 24 2007, 11:06 AM
koen   QUOTE(Dromede @ Oct 24 2007, 07:06 PM) IM...   Oct 24 2007, 12:45 PM
Dromede   now that's some useful info. Now, do the apps ...   Oct 24 2007, 01:30 PM
koen   Xv 'just works', pxa270 overlay needs patc...   Oct 25 2007, 12:41 AM
ofels   QUOTE(koen @ Oct 25 2007, 10:41 AM) Xv ...   Oct 25 2007, 02:24 AM
koen   QUOTE(ofels @ Oct 25 2007, 10:24 AM) QUOT...   Oct 25 2007, 03:32 AM
ofels   QUOTE(koen @ Oct 25 2007, 01:32 PM) QUOTE...   Oct 25 2007, 04:29 AM
koen   QUOTE(ofels @ Oct 25 2007, 12:29 PM) QUOT...   Oct 25 2007, 04:34 AM
speculatrix   QUOTE(koen @ Oct 25 2007, 01:34 PM) overl...   Oct 26 2007, 02:14 PM
adf   QUOTE(speculatrix @ Oct 26 2007, 02:14 PM...   Oct 26 2007, 08:40 PM
speculatrix   QUOTE(koen @ Oct 25 2007, 09:41 AM) last ...   Oct 25 2007, 01:05 PM
jpmatrix   kernel 2.6.23 tried under debian eabi too nothing ...   Oct 26 2007, 03:26 AM


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 28th December 2014 - 02:55 AM