From: Jonathan Corbet <corbet@lwn.net>
To: Albert Wang <twang13@marvell.com>
Cc: "g.liakhovetski@gmx.de" <g.liakhovetski@gmx.de>,
"linux-media@vger.kernel.org" <linux-media@vger.kernel.org>,
Libin Yang <lbyang@marvell.com>
Subject: Re: [PATCH V3 15/15] [media] marvell-ccic: add 3 frame buffers support in DMA_CONTIG mode
Date: Sun, 16 Dec 2012 15:55:03 -0700 [thread overview]
Message-ID: <20121216155503.2ce60997@lwn.net> (raw)
In-Reply-To: <477F20668A386D41ADCC57781B1F70430D13C8CCE7@SC-VEXCH1.marvell.com>
On Sun, 16 Dec 2012 14:34:31 -0800
Albert Wang <twang13@marvell.com> wrote:
> >What is the purpose of the "usebufs" field? The code maintains it in
> >various places, but I don't see anywhere that actually uses that value for
> >anything.
> >
> [Albert Wang] Two buffers mode doesn't need it.
> But Three buffers mode need it indicates which conditions we need set the single buffer flag.
> I used "tribufs" as the name in the previous version, but it looks it's a confused name when we merged
> Two buffers mode and Three buffers mode with same code by removing #ifdef based on your comments months ago. :)
> So we just changed the name with "usebufs".
OK, I misread the code a bit, sorry. I do find the variable confusing
still, but it clearly does play a role.
I think that using three buffers by default would make sense. I don't
think that increased overruns are an unbreakable ABI feature :)
Feel free to add my ack to this one.
Thanks,
jon
next prev parent reply other threads:[~2012-12-16 22:52 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-15 9:57 [PATCH V3 00/15] [media] marvell-ccic: add soc camera support on marvell-ccic Albert Wang
2012-12-15 9:57 ` [PATCH V3 01/15] [media] marvell-ccic: use internal variable replace global frame stats variable Albert Wang
2012-12-16 15:36 ` Jonathan Corbet
2012-12-27 20:07 ` Mauro Carvalho Chehab
2013-01-01 14:56 ` Guennadi Liakhovetski
2012-12-15 9:57 ` [PATCH V3 02/15] [media] marvell-ccic: add MIPI support for marvell-ccic driver Albert Wang
2012-12-16 15:54 ` Jonathan Corbet
2012-12-16 21:45 ` Albert Wang
2013-01-01 15:28 ` Guennadi Liakhovetski
2013-01-01 19:31 ` Albert Wang
2012-12-15 9:57 ` [PATCH V3 03/15] [media] marvell-ccic: add clock tree " Albert Wang
2012-12-16 16:03 ` Jonathan Corbet
2012-12-16 21:51 ` Albert Wang
2013-01-03 17:37 ` Nicolas THERY
2013-01-03 19:27 ` Albert Wang
2013-01-01 16:05 ` Guennadi Liakhovetski
2013-01-01 19:36 ` Albert Wang
2013-01-04 5:42 ` Libin Yang
2013-01-04 10:25 ` Guennadi Liakhovetski
2013-01-05 3:12 ` Libin Yang
2012-12-15 9:57 ` [PATCH V3 04/15] [media] marvell-ccic: reset ccic phy when stop streaming for stability Albert Wang
2012-12-16 16:04 ` Jonathan Corbet
2013-01-01 16:13 ` Guennadi Liakhovetski
2012-12-15 9:57 ` [PATCH V3 05/15] [media] marvell-ccic: refine mcam_set_contig_buffer function Albert Wang
2012-12-16 16:06 ` Jonathan Corbet
2012-12-16 21:54 ` Albert Wang
2012-12-15 9:57 ` [PATCH V3 06/15] [media] marvell-ccic: add new formats support for marvell-ccic driver Albert Wang
2012-12-16 16:16 ` Jonathan Corbet
2012-12-16 21:58 ` Albert Wang
2013-01-01 16:56 ` Guennadi Liakhovetski
2013-01-01 19:42 ` Albert Wang
2013-01-01 20:03 ` Guennadi Liakhovetski
2013-01-04 9:32 ` Libin Yang
2013-01-10 7:53 ` Libin Yang
2012-12-15 9:57 ` [PATCH V3 07/15] [media] marvell-ccic: add SOF / EOF pair check " Albert Wang
2012-12-16 16:19 ` Jonathan Corbet
2012-12-16 22:00 ` Albert Wang
2013-01-02 7:48 ` Guennadi Liakhovetski
2012-12-15 9:57 ` [PATCH V3 08/15] [media] marvell-ccic: switch to resource managed allocation and request Albert Wang
2012-12-16 16:20 ` Jonathan Corbet
2013-01-02 8:00 ` Guennadi Liakhovetski
2012-12-15 9:57 ` [PATCH V3 09/15] [media] marvell-ccic: add get_mcam function for marvell-ccic driver Albert Wang
2012-12-16 16:24 ` Jonathan Corbet
2012-12-16 22:04 ` Albert Wang
2013-01-02 8:16 ` Guennadi Liakhovetski
2012-12-15 9:57 ` [PATCH V3 10/15] [media] marvell-ccic: split mcam-core into 2 parts for soc_camera support Albert Wang
2012-12-16 16:37 ` Jonathan Corbet
2012-12-16 22:12 ` Albert Wang
2012-12-17 15:28 ` Jonathan Corbet
2012-12-18 3:04 ` Albert Wang
2012-12-18 19:15 ` Jonathan Corbet
2012-12-18 20:48 ` Albert Wang
2013-01-31 8:29 ` Albert Wang
2013-02-05 3:14 ` Jonathan Corbet
2013-02-06 3:21 ` Albert Wang
2012-12-15 9:58 ` [PATCH V3 11/15] [media] marvell-ccic: add soc_camera support in mcam core Albert Wang
2012-12-15 9:58 ` [PATCH V3 12/15] [media] marvell-ccic: add soc_camera support in mmp driver Albert Wang
2012-12-16 16:46 ` Jonathan Corbet
2012-12-16 22:19 ` Albert Wang
2012-12-15 9:58 ` [PATCH V3 13/15] [media] marvell-ccic: add dma burst mode support in marvell-ccic driver Albert Wang
2012-12-16 16:49 ` Jonathan Corbet
2012-12-16 22:22 ` Albert Wang
2012-12-15 9:58 ` [PATCH V3 14/15] [media] marvell-ccic: use unsigned int type replace int type Albert Wang
2012-12-16 16:50 ` Jonathan Corbet
2012-12-15 9:58 ` [PATCH V3 15/15] [media] marvell-ccic: add 3 frame buffers support in DMA_CONTIG mode Albert Wang
2012-12-16 16:56 ` Jonathan Corbet
2012-12-16 22:34 ` Albert Wang
2012-12-16 22:55 ` Jonathan Corbet [this message]
2012-12-17 5:06 ` Albert Wang
2012-12-16 16:57 ` [PATCH V3 00/15] [media] marvell-ccic: add soc camera support on marvell-ccic Jonathan Corbet
2012-12-16 22:34 ` Albert Wang
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