Where to start

Where to start

[Arpad Wang]

Hello all,

sorry for asking a 'basic' question on this list. If this is indeed the
wrong place (and even if it isn't!), please feel free to point me to a
better forum for arm/omap specific kernel discussions.

My questions are:
1. What is a good place to read up on how to write board files and
drivers for OMAP3/4 based boards? The documentation I have found is
scarce and often outdated.
2. A specific problem I have is with DSS/FB/LCD panel/the like. We have
an old board file for v2.6.32 TI PSP. Despite doing what appears to be
equivalent to what the old board file does, there is nothing shown on
the LCD (nor DVI, VGA, TV-out, ....). What could have changed between
TI's 2.6.32 and 3.0-omap that causes, for instance an LCD panel, to stay
blank in the latter but not in the former.

While an answer would be very appreciated, even better would be to get
hints on how to learn to figure out the answer to #2 by myself...
feeling that will be a handy skill... :-)

Thank you,

Arpad

-- 
http://www.fastmail.fm - The professional email service

Where to start

[gaurav]

Hi All,
I know it seems bugging but after googling a lot and following links i'm still 
not able to find any place to get bugs of beginner level that i can fix and 
start contributing in kernel development.
I also don't know that whom should i contact to get a mentor.
Please help me out.

Gaurav

Re: Where to start

[Dan Carpenter]

On Sat, Jul 20, 2013 at 08:50:28AM +0530, gaurav wrote:
> Hi All,
> I know it seems bugging but after googling a lot and following links i'm still 
> not able to find any place to get bugs of beginner level that i can fix and 
> start contributing in kernel development.
> I also don't know that whom should i contact to get a mentor.
> Please help me out.
> 

Just pick something from staging and look at the Sparse warnings.

Send your first patch to this list instead of to the maintainer and
we can review it for you.

regards,
dan carpenter

Re: Where to start

[Shaun Laing]

Hi Dan,

I have a similar question, but unfortunately I don't know what
"staging" is or what a "Sparse" warning looks like.  This seems pretty
trivial so I'm wondering if there a primer webpage that I have
overlooked.  Would you happen to have a link?

Sorry to bug you, and thank you for your help.

On Sat, Jul 20, 2013 at 4:55 PM, Dan Carpenter <dan.carpenter@oracle.com> wrote:
> On Sat, Jul 20, 2013 at 08:50:28AM +0530, gaurav wrote:
>> Hi All,
>> I know it seems bugging but after googling a lot and following links i'm still
>> not able to find any place to get bugs of beginner level that i can fix and
>> start contributing in kernel development.
>> I also don't know that whom should i contact to get a mentor.
>> Please help me out.
>>
>
> Just pick something from staging and look at the Sparse warnings.
>
> Send your first patch to this list instead of to the maintainer and
> we can review it for you.
>
> regards,
> dan carpenter
>
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-- 
Shaun Laing
https://plus.google.com/112011120275739767304

Re: Where to start

[Dan Carpenter]

On Mon, Jul 22, 2013 at 07:14:19AM -0600, Shaun Laing wrote:
> Hi Dan,
> 
> I have a similar question, but unfortunately I don't know what
> "staging" is or what a "Sparse" warning looks like.  This seems pretty
> trivial so I'm wondering if there a primer webpage that I have
> overlooked.  Would you happen to have a link?
> 
> Sorry to bug you, and thank you for your help.

staging is the drivers/staging/ directory.  It's where crap code
goes.

Here is an article on Sparse: http://lwn.net/Articles/205624/

regards,
dan carpenter

Re: Where to start

[Dan Carpenter]

Ah yes, those are much better links.  Thanks.

regards,
dan carpenter

Re: Where to start

[Prashant Shah]

Hi,

On Mon, Jul 22, 2013 at 6:44 PM, Shaun Laing <shaun@bigps.ca> wrote:
> Hi Dan,
>
> I have a similar question, but unfortunately I don't know what
> "staging" is or what a "Sparse" warning looks like.  This seems pretty
> trivial so I'm wondering if there a primer webpage that I have
> overlooked.  Would you happen to have a link?

Check the kernel source for drivers/staging folder.

Regards.

Re: Where to start

[Prashant Shah]

Hi,

>> I have a similar question, but unfortunately I don't know what
>> "staging" is or what a "Sparse" warning looks like.  This seems pretty
>> trivial so I'm wondering if there a primer webpage that I have
>> overlooked.  Would you happen to have a link?
>

Documentation/sparse.txt in the kernel sources.

Re: Where to start

[Prashant Shah]

Hi,

On Mon, Jul 22, 2013 at 6:52 PM, Prashant Shah <pshah.mumbai@gmail.com> wrote:
> Hi,
>
>>> I have a similar question, but unfortunately I don't know what
>>> "staging" is or what a "Sparse" warning looks like.  This seems pretty
>>> trivial so I'm wondering if there a primer webpage that I have
>>> overlooked.  Would you happen to have a link?

http://lwn.net/Articles/87538/
http://elinux.org/Sparse

Regards.

Re: Where to start

[kumargauravgupta3]

On Sunday 21 Jul 2013 1:55:59 AM Dan Carpenter wrote:
> On Sat, Jul 20, 2013 at 08:50:28AM +0530, gaurav wrote:
> > Hi All,
> > I know it seems bugging but after googling a lot and following links 
i'm
> > still not able to find any place to get bugs of beginner level that i 
can
> > fix and start contributing in kernel development.
> > I also don't know that whom should i contact to get a mentor.
> > Please help me out.
> 
> Just pick something from staging and look at the Sparse warnings.
> 
> Send your first patch to this list instead of to the maintainer and
> we can review it for you.
> 
> regards,
> dan carpenter
Sorry for late reply Dan, Thanks for your suggesstion and now i'm 
actually working to fix bug. will email my fix soon.
thanks

Regards
Kumar Gaurav