Bug#462529: linux-2.6: Add config file support for efika and PS3 (preliminary)

[Geoff Levand <geoffrey.levand@am.sony.com>]

Bastian Blank wrote:
> On Wed, May 28, 2008 at 04:22:45PM -0700, Geoff Levand wrote:
>> Bastian Blank wrote:
>> There is a 2.6.25 undefined symbol bug in PS3AV that
>> won't allow it to be built as a module.
> 
> It is even unfixed in -rc4 and it is needed by FB_PS3.


I just found that bug a few days ago (testing debian).
It should go into -rc5.

It went unfound for many months because no one builds the
PS3 frame buffer as a module.  It comes up too late.  I
think if you have it as a module, most users will complain
about it.


>> >> -# CONFIG_GEN_RTC is not set
>> >> +CONFIG_GEN_RTC=y
>> > Why?
>> I am not so familiar with this option.  I saw
>> an RTC error message when this was not enabled.
> 
> Please show the error.

This is the error:

  Setting the system clock.
  Cannot access the Hardware Clock via any known method.
  Use the --debug option to see the details of our search for an access method.
  * Unable to set System Clock to: Fri May 30 20:33:06 UTC 2008

  ice:~# hwclock --debug
  hwclock from util-linux-ng 2.13.1.1
  hwclock: Open of /dev/rtc failed, errno=2: No such file or directory.
  No usable clock interface found.
  Cannot access the Hardware Clock via any known method.
  ice:~# ls -l /dev/rtc*
  ls: cannot access /dev/rtc*: No such file or directory

The PS3 does not have an RTC driver.  The PS3 platform code just hooks into
the standard powerpc ppc_md.set_rtc_time and ppc_md.get_rtc_time pointers
(arch/powerpc/platforms/ps3/time.c).

>From what I understand the work to hookup the powerpc ppc_md. rtc routines
to the RTC_INTF_DEV routines has not been done.  See here:

  http://marc.info/?t=120352654700002&r=1&w=2

I'll look into this.  I either need to make a gen_rtc driver for the
new rtc subsytem, or make a ps3 specific rtc driver.


>> I can test your proposed config if you make it available to me.
> 
> I commited large parts of it in the trunk.

I tested it, and in general it works OK.  I put the dmesg here:

  http://cell.gotdns.org/pub/debian-cell-kernel-2/

You don't have CONFIG_LOGO_LINUX_CLUT224 set, so the SPE logos are not
rendered correctly.  It looks like the lines of pixel are not aligned.
Geert, can you say why?  Is it a bug in the logo code?

I'll do some more testing next week.


-Geoff