linux-kernel - Re: [PATCH v6 0/2] patch set about the MXS-DMA

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Date:	Wed, 29 Feb 2012 11:10:29 +0800
From:	Huang Shijie <b32955@...escale.com>
To:	Huang Shijie <b32955@...escale.com>
CC:	<vinod.koul@...el.com>, <shawn.guo@...aro.org>,
	<artem.bityutskiy@...el.com>, <w.sang@...gutronix.de>,
	<LW@...O-electronics.de>, <broonie@...nsource.wolfsonmicro.com>,
	<lrg@...com>, <cjb@...top.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-mtd@...ts.infradead.org>, <linux-mmc@...r.kernel.org>,
	<alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 0/2] patch set about the MXS-DMA

Hi:

ping.

Any comment about this patch set?

thanks
Huang Shijie
> patch 1: move the mxs dma header to a more common place.
> 	Beside the mx23/mx28, the apbh-dma is also used by MX50 and MX6Q.
> 	So move the mxs dma header file to a more common place, and rename
> 	it to mxs-dma.h
>
> patch 2: rewrite the last parameter of mxs_dma_prep_slave_sg().
> 	In the new GPMI version, some hardware behavior changes.
> 	The WAIT4END bit should be set in the middle one of the ECC READ page DMA chain.
> 	The DMA chain should be set like this:
>
>           +-----+               +-----+                      +-----+
>           | cmd | ------------> | cmd | ------------------>  | cmd |
>           +-----+               +-----+                      +-----+
>                                    ^                            ^
>                                    |                            |
>                                    |                            |
>                               set WAIT4END here too        set WAIT4END here
>
>         So rewrite the last parameter of mxs_dma_prep_slave_sg(), use the
> 	dma_ctrl_flags to set the proper DMA bit for DMA Command Structure.
> 	And change the relative drivers with the dma_ctrl_flags.
>
> TEST:
> 	Tested the mxs-mmc driver and gpmi-nand drive with the two patches
> 	in MX28 board.
>
> v5 --> v6:
> 	[1] create this patch set based on the mainline.
>
> v4 --> v5:
> 	[1] remove GPMI_IS_MX6Q(), make the mxs and mx6q use the same code.
> 		
> v3 --> v4:
> 	[1] create a new folder include/linux/fsl/ for store the Freescale's
> 	    header files.
> 	[2] add more CCs.
>
> v2 --> v3:
> 	[1] remove field gpmi_version, use GPMI_IS_MX6Q() instead.
>
> v1 --> v2:
> 	[1] squash the trial patches into single patch.
> 	[2] use the dma_ctrl_flags.
>
>
> Huang Shijie (2):
>   mxs-dma : move the mxs dma.h to a more common place
>   mxs-dma : rewrite the last parameter of mxs_dma_prep_slave_sg()
>
>  drivers/dma/mxs-dma.c                              |   34 +++++++++++++++++---
>  drivers/mmc/host/mxs-mmc.c                         |   12 +++---
>  drivers/mtd/nand/gpmi-nand/gpmi-lib.c              |   19 +++++++---
>  drivers/mtd/nand/gpmi-nand/gpmi-nand.h             |    2 +-
>  .../mach/dma.h => include/linux/fsl/mxs-dma.h      |    0
>  sound/soc/mxs/mxs-pcm.c                            |    2 +-
>  sound/soc/mxs/mxs-pcm.h                            |    2 +-
>  sound/soc/mxs/mxs-saif.c                           |    2 +-
>  8 files changed, 52 insertions(+), 21 deletions(-)
>  rename arch/arm/mach-mxs/include/mach/dma.h => include/linux/fsl/mxs-dma.h (100%)
>


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