[PATCH 2/2] ARM: dts: add AM33XX MMC support

Thu Mar 7 11:02:36 EST 2013

On Thu, Mar 07, 2013 at 03:50:01PM +0000, Vaibhav Hiremath wrote:
> 
> > -----Original Message-----
> > From: Matt Porter [mailto:ohiomdp at gmail.com] On Behalf Of Porter, Matt
> > Sent: Thursday, March 07, 2013 8:34 PM
> > To: Hiremath, Vaibhav
> > Cc: Chris Ball; Russell King; Krishnamoorthy, Balaji T; Devicetree
> > Discuss; Linux MMC List; Linux Kernel Mailing List; Linux OMAP List;
> > Linux ARM Kernel List
> > Subject: Re: [PATCH 2/2] ARM: dts: add AM33XX MMC support
> > 
> > On Thu, Mar 07, 2013 at 02:59:42PM +0000, Vaibhav Hiremath wrote:
> > >
> > > > -----Original Message-----
> > > > From: Hiremath, Vaibhav
> > > > Sent: Thursday, March 07, 2013 8:24 PM
> > > > To: Porter, Matt
> > > > Cc: Linux OMAP List; Russell King; Krishnamoorthy, Balaji T;
> > Devicetree
> > > > Discuss; Linux MMC List; Linux Kernel Mailing List; Chris Ball;
> > Linux
> > > > ARM Kernel List
> > > > Subject: RE: [PATCH 2/2] ARM: dts: add AM33XX MMC support
> > > >
> > > > > -----Original Message-----
> > > > > From: Matt Porter [mailto:ohiomdp at gmail.com] On Behalf Of Porter,
> > > > Matt
> > > > > Sent: Thursday, March 07, 2013 8:17 PM
> > > > > To: Hiremath, Vaibhav
> > > > > Cc: Linux OMAP List; Russell King; Krishnamoorthy, Balaji T;
> > > > Devicetree
> > > > > Discuss; Linux MMC List; Linux Kernel Mailing List; Chris Ball;
> > Linux
> > > > > ARM Kernel List
> > > > > Subject: Re: [PATCH 2/2] ARM: dts: add AM33XX MMC support
> > > > >
> > > > > On Thu, Mar 07, 2013 at 02:39:55PM +0000, Vaibhav Hiremath wrote:
> > > > > >
> > > > > > > -----Original Message-----
> > > > > > > From: Matt Porter [mailto:ohiomdp at gmail.com] On Behalf Of
> > Porter,
> > > > > Matt
> > > > > > > Sent: Thursday, March 07, 2013 7:43 PM
> > > > > > > To: Hiremath, Vaibhav
> > > > > > > Cc: Krishnamoorthy, Balaji T; Chris Ball; Cousson, Benoit;
> > Tony
> > > > > > > Lindgren; Russell King; Devicetree Discuss; Linux ARM Kernel
> > > > List;
> > > > > > > Linux OMAP List; Linux Kernel Mailing List; Linux MMC List
> > > > > > > Subject: Re: [PATCH 2/2] ARM: dts: add AM33XX MMC support
> > > > > > >
> > > > > > > On Thu, Mar 07, 2013 at 05:29:24AM +0000, Vaibhav Hiremath
> > wrote:
> > > > > > > > > -----Original Message-----
> > > > > > > > > From: linux-omap-owner at vger.kernel.org [mailto:linux-
> > omap-
> > > > > > > > > owner at vger.kernel.org] On Behalf Of Porter, Matt
> > > > > > > > > Sent: Thursday, March 07, 2013 9:47 AM
> > > > > > > > > To: Krishnamoorthy, Balaji T; Chris Ball; Cousson,
> > Benoit;
> > > > Tony
> > > > > > > > > Lindgren; Russell King
> > > > > > > > > Cc: Devicetree Discuss; Linux ARM Kernel List; Linux OMAP
> > > > List;
> > > > > > > Linux
> > > > > > > > > Kernel Mailing List; Linux MMC List
> > > > > > > > > Subject: [PATCH 2/2] ARM: dts: add AM33XX MMC support
> > > > > > > > >
> > > <snip>
> > > >
> > > > I believe you meant "CONFIG_TI_EDMA" right?
> > > >
> > > > Yes, I just enabled it and the result is still same.
> > > >
> > > >
> > > >
> > > > [root at arago /]# dmesg | grep -ir mmc
> > > > [    0.506844] vmmc: 1800 <--> 3300 mV at 3300 mV
> > > > [    0.506970] vmmc: supplied by vbat
> > > > [root at arago /]#
> > > > [root at arago /]#
> > > > [root at arago /]# dmesg | grep -ir dma
> > > > [    0.217063] DMA: preallocated 256 KiB pool for atomic coherent
> > > > allocations
> > > > [    0.236321] platform 49000000.edma: alias fck already exists
> > > > [    0.236360] platform 49000000.edma: alias fck already exists
> > > > [    0.236381] platform 49000000.edma: alias fck already exists
> > > > [    0.370705] edma-dma-engine edma-dma-engine.0: TI EDMA DMA
> > engine
> > > > driver
> > > > [    0.445156] omap-dma-engine omap-dma-engine: OMAP DMA engine
> > driver
> > > > [root at arago /]#
> > > > [root at arago /]#
> > > >
> > > >
> > > I have applied below patches from your recent post
> > >
> > >
> > > [2/2] ARM: dts: add AM33XX MMC support
> > > [1/2] mmc: omap_hsmmc: set max_segs based on dma engine limits
> > > [v4,3/3] mmc: davinci: get SG segment limits with
> > dma_get_slave_sg_limits()
> > > [v4,2/3] dma: edma: add device_slave_sg_limits() support
> > > [v4,1/3] dmaengine: add dma_get_slave_sg_limits()
> > > [v9,9/9] ARM: dts: add AM33XX SPI DMA support
> > > [v9,8/9] spi: omap2-mcspi: add generic DMA request support to the DT
> > binding
> > > [v9,7/9] spi: omap2-mcspi: convert to
> > dma_request_slave_channel_compat()
> > > [v9,6/9] ARM: dts: add AM33XX EDMA support
> > > [v9,5/9] dmaengine: edma: Add TI EDMA device tree binding
> > > [v9,4/9] dmaengine: edma: enable build for AM33XX
> > > [v9,3/9] ARM: edma: add AM33XX support to the private EDMA API
> > > [v9,2/9] ARM: edma: remove unused transfer controller handlers
> > > [v9,1/9] ARM: davinci: move private EDMA API to arm/common
> > > [v3,2/2] mmc: omap_hsmmc: add generic DMA request support to the DT
> > binding
> > > [v3,1/2] mmc: omap_hsmmc: convert to
> > dma_request_slave_channel_compat()
> > >
> > >
> > >
> > > Am I missing anything here?
> > 
> > Yes, you missed the
> > http://www.spinics.net/lists/arm-kernel/msg227886.html dependency
> > mentioned first in the cover letter.
> > 
> 
> Matt, I manually edited the file with above patch and result is still the same.
> Can you point me to branch where you have tested MMC code?

git://github.com/ohporter/linux.git edma-dmaengine-am33xx-mmc-v1

omap2plus_defconfig + CONFIG_TI_EDMA

I just doublechecked MMC rootfs on bone and evmsk as it's the standard
smoke test. My EVM is intermittent now so trying to coax it to power up
to reverify.

-Matt

> diff --git a/arch/arm/common/edma.c b/arch/arm/common/edma.c
> index 8c3b1fa..e68ac38 100644
> --- a/arch/arm/common/edma.c
> +++ b/arch/arm/common/edma.c
> @@ -730,6 +730,9 @@ EXPORT_SYMBOL(edma_free_channel);
>   */
>  int edma_alloc_slot(unsigned ctlr, int slot)
>  {
> +       if (!edma_cc[ctlr])
> +               return -EINVAL;
> +
>         if (slot >= 0)
>                 slot = EDMA_CHAN_SLOT(slot);
> 
> Thanks,
> Vaibhav
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