[Mer-discuss] Mer and SmartQ

[You Sheng]

Hi David,
2009/9/25 David Greaves <david at dgreaves.com>

> Hi Stanley/David
>
> I've bcc'ed you as I don't think you're on the email list yet.
>
> We've been busy with Mer and have been making sure the SmartQ 5/7 devices
> are
> fully supported. We have started to talk with people about getting the code
> integrated into the mainline kernel and that's going well; a SmartQ7 patch
> has
> just been posted on our mailing list for review.
>
> We are currently working on the XAA acceleration and video support and I
> think
> we have a breakthrough there too.
>
Is this branch? http://gitorious.org/mer/xserver-xorg-video-fbdev

>
> A new release of Maemo will be available soon and we've been busy making
> sure
> that we are ready for that - we are hoping to make some real improvements
> to the
> UI look and feel.
>
Great news, thanks for your guys hard working. Really appreciated.

>
> We have a few areas we'd like to follow up on:
> * MMC
> There has been some discussion of MMC problems causing the internal MMC to
> become corrupted. Did this commit:
>
> http://gitorious.org/mer-smartq/mer-smartq-kernel/commit/112a485fecdaeabe2b5fc7c1eea0832d2da26c0d
> fix that or is there still an issue?
>
> This is not a MMC patch, it only fix Q5/Q7 can't suspend which's memory
chips provided by Mira.

> * We would like to do q5/q7 runtime distinction detection - can you suggest
> the
> best way to do this? (GPIO pin, SoC system ID, ARM ID, EEPROM, ...?)
>
> Read: /sys/devices/platform/hhtech_gpio/system_flag
Q5: system_flag = 0
Q7: system_flag = 1

* Power consumption in Mer is not very good; any ideas?
>
On suspend or full power running? How many milliamp ?

>
> * Is there dynamic CPU voltage scaling? We'd like to understand how the
> freq/voltage scaling works.
>
No CPU voltage scaling support. CPU freq scaling based on kernel cpufreq
 subsystem, ondemand is the default cpufreq policy governor.
arch/arm/plat-s3c64xx/clock.c is the scaling code.


> * How can we power the device off from SW.
>
> echo 0 > /sys/devices/platform/hhtech_gpio/pwr_en

> * Could we get schematics and/or a list of used electronics and their GPIO
> connections/I2C addresses/datasheets/... for the Q5 and Q7?


> We want to stay in touch as much as we can so we would also be delighted if
> you'd join the Mer-discuss mailing list (copied) which will be for more
> technical issues around Mer and allows us to include and support people who
> don't use irc as much.
> see: https://garage.maemo.org/mailman/listinfo/mer-discuss
> for joining details.
>
> We will be glad to.

> David
>
> --
> "Don't worry, you'll be fine; I saw it work in a cartoon once..."
>

Cherrs.

You Sheng
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