2010-01-05 07:05:48

by Naren (Narendra) Sankar

[permalink] [raw]
Subject: Re: [PATCH v3] staging: add Broadcom Crystal HD driver

That is ok by us.

The driver does only use a small subset.

Naren

----- Original Message -----
From: Jarod Wilson <[email protected]>
To: Naren (Narendra) Sankar
Cc: Robert Hancock <[email protected]>; Jarod Wilson <[email protected]>; Greg KH <[email protected]>; [email protected] <[email protected]>; Scott Davilla <[email protected]>; Manu Abraham <[email protected]>
Sent: Mon Jan 04 22:58:29 2010Subject: Re: [PATCH v3] staging: add Broadcom Crystal HD driver

On Mon, Jan 4, 2010 at 9:36 PM, Naren (Narendra) Sankar
<[email protected]> wrote:
> The register bits come straight from the HW RTL. So this way there are no errors or typos. It would be easier for maintenance from our side since this is generated automagically. And when we add new HW, again it is a script that spews this out.
>
> Not absolutely necessary, but worried that cleanups may cause more problems than fix.

I think the automation is worth it to a point, but this header does
seem to be a wee bit excessive. I doubt if we're even using 1% of the
~12k defines in that one header, so we're bloating the code by a huge
amount for relatively little benefit. Its probably worth maintaining
the full register header *somewhere* (in with the userspace lib
somewhere?), but maybe we just do a trimmed down version for the
kernel module that contains only the bits we actually need.

> -----Original Message-----
> From: Robert Hancock [mailto:[email protected]]
> Sent: Monday, January 04, 2010 6:22 PM
> To: Jarod Wilson
> Cc: Greg KH; [email protected]; Scott Davilla; Naren (Narendra) Sankar; Manu Abraham
> Subject: Re: [PATCH v3] staging: add Broadcom Crystal HD driver
>
> On 01/04/2010 05:34 PM, Jarod Wilson wrote:
>> On 1/4/10 6:19 PM, Greg KH wrote:
>>> On Mon, Jan 04, 2010 at 06:02:27PM -0500, Jarod Wilson wrote:
>>>> This patch supersedes the earlier ones sent by Manu Abraham to add
>>>> the Broadcom Crystal HD driver to the staging tree, per discussion
>>>> with him about it. I've been working with Broadcom's Naren Sankar
>>>> on this driver for a number of months, and had already talked Naren
>>>> about submitting this on Broadcom's behalf, didn't expect anyone
>>>> else to jump on submitting it as quickly as Manu did. ;)
>>>
>>> Looks good, I'll queue it up tomorrow.
>>
>> Nb: it looks like the thing is so massive (~935k), its not showing up on
>> lkml (at least, not in a timely fashion), so for the interested:
>>
>> <http://people.redhat.com/jwilson/misc/broadcom-crystalhd-decoder-driver-staging.patch>
>>
>> Thanks much!
>
> Literally the majority of the code is #defines for what looks like
> register bits, etc - is all that really necessary?
>
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to [email protected]
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at  http://www.tux.org/lkml/
>



--
Jarod Wilson
[email protected]

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2010-01-05 07:10:57

by Jarod Wilson

[permalink] [raw]
Subject: Re: [PATCH v3] staging: add Broadcom Crystal HD driver

Okay, cool. Greg, would you like an updated trimmed header before
adding this to staging, or can I just follow up later with a patch to
reduce the heft?

--jarod


On Tue, Jan 5, 2010 at 2:05 AM, Naren (Narendra) Sankar
<[email protected]> wrote:
> That is ok by us.
>
> The driver does only use a small subset.
>
> Naren
>
> ----- Original Message -----
> From: Jarod Wilson <[email protected]>
> To: Naren (Narendra) Sankar
> Cc: Robert Hancock <[email protected]>; Jarod Wilson <[email protected]>; Greg KH <[email protected]>; [email protected] <[email protected]>; Scott Davilla <[email protected]>; Manu Abraham <[email protected]>
> Sent: Mon Jan 04 22:58:29 2010
> Subject: Re: [PATCH v3] staging: add Broadcom Crystal HD driver
>
> On Mon, Jan 4, 2010 at 9:36 PM, Naren (Narendra) Sankar
> <[email protected]> wrote:
>> The register bits come straight from the HW RTL. So this way there are no errors or typos. It would be easier for maintenance from our side since this is generated automagically. And when we add new HW, again it is a script that spews this out.
>>
>> Not absolutely necessary, but worried that cleanups may cause more problems than fix.
>
> I think the automation is worth it to a point, but this header does
> seem to be a wee bit excessive. I doubt if we're even using 1% of the
> ~12k defines in that one header, so we're bloating the code by a huge
> amount for relatively little benefit. Its probably worth maintaining
> the full register header *somewhere* (in with the userspace lib
> somewhere?), but maybe we just do a trimmed down version for the
> kernel module that contains only the bits we actually need.
>
>> -----Original Message-----
>> From: Robert Hancock [mailto:[email protected]]
>> Sent: Monday, January 04, 2010 6:22 PM
>> To: Jarod Wilson
>> Cc: Greg KH; [email protected]; Scott Davilla; Naren (Narendra) Sankar; Manu Abraham
>> Subject: Re: [PATCH v3] staging: add Broadcom Crystal HD driver
>>
>> On 01/04/2010 05:34 PM, Jarod Wilson wrote:
>>> On 1/4/10 6:19 PM, Greg KH wrote:
>>>> On Mon, Jan 04, 2010 at 06:02:27PM -0500, Jarod Wilson wrote:
>>>>> This patch supersedes the earlier ones sent by Manu Abraham to add
>>>>> the Broadcom Crystal HD driver to the staging tree, per discussion
>>>>> with him about it. I've been working with Broadcom's Naren Sankar
>>>>> on this driver for a number of months, and had already talked Naren
>>>>> about submitting this on Broadcom's behalf, didn't expect anyone
>>>>> else to jump on submitting it as quickly as Manu did. ;)
>>>>
>>>> Looks good, I'll queue it up tomorrow.
>>>
>>> Nb: it looks like the thing is so massive (~935k), its not showing up on
>>> lkml (at least, not in a timely fashion), so for the interested:
>>>
>>> <http://people.redhat.com/jwilson/misc/broadcom-crystalhd-decoder-driver-staging.patch>
>>>
>>> Thanks much!
>>
>> Literally the majority of the code is #defines for what looks like
>> register bits, etc - is all that really necessary?
>>
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> the body of a message to [email protected]
>> More majordomo info at ?http://vger.kernel.org/majordomo-info.html
>> Please read the FAQ at ?http://www.tux.org/lkml/
>>
>
>
>
> --
> Jarod Wilson
> [email protected]
>
>



--
Jarod Wilson
[email protected]

2010-01-05 15:00:59

by Greg KH

[permalink] [raw]
Subject: Re: [PATCH v3] staging: add Broadcom Crystal HD driver

On Tue, Jan 05, 2010 at 02:10:56AM -0500, Jarod Wilson wrote:
> Okay, cool. Greg, would you like an updated trimmed header before
> adding this to staging, or can I just follow up later with a patch to
> reduce the heft?

Later patches cleaning stuff up are best.

thanks,

greg k-h