Subject: [PATCH v7 01/10] ARM: davinci: move private EDMA API to arm/common

From: [email-masked] (Matt Porter)
Date: Mon, 4 Mar 2013 17:05:35 -0500

On Sat, Feb 09, 2013 at 09:35:53PM +0530, Sekhar Nori wrote:
> Hi Matt,
> 
> This version introduces build/bisect issues.

Ok, see later comment which addresses this...

> On 2/1/2013 11:52 PM, Matt Porter wrote:
> > Move mach-davinci/dma.c to common/edma.c so it can be used
> > by OMAP (specifically AM33xx) as well.
> > 
> > Signed-off-by: Matt Porter <[email-masked]>
> > Acked-by: Sekhar Nori <[email-masked]>
> 
> > diff --git a/arch/arm/mach-davinci/dma.c b/arch/arm/common/edma.c
> 
> > @@ -25,7 +25,7 @@
> >  #include <linux/io.h>
> >  #include <linux/slab.h>
> >  
> > -#include <mach/edma.h>
> > +#include <linux/platform_data/edma.h>
> 
> >  /*-----------------------------------------------------------------------*/
> > +static int edma_of_read_u32_to_s8_array(const struct device_node *np,
> > +					 const char *propname, s8 *out_values,
> > +					 size_t sz)
> > +{
> > +	int ret;
> > +
> > +	ret = of_property_read_u8_array(np, propname, out_values, sz);
> 
> This needs <linux/of.h> to be included in this file.
> 
> > +static int edma_xbar_event_map(struct device *dev,
> > +			       struct device_node *node,
> > +			       struct edma_soc_info *pdata, int len)
> > +{
> > +	int ret = 0;
> > +	int i;
> > +	struct resource res;
> > +	void *xbar;
> > +	const s16 (*xbar_chans)[2];
> > +	u32 shift, offset, mux;
> > +
> > +	xbar_chans = devm_kzalloc(dev,
> > +				  len/sizeof(s16) + 2*sizeof(s16),
> > +				  GFP_KERNEL);
> > +	if (!xbar_chans)
> > +		return -ENOMEM;
> > +
> > +	ret = of_address_to_resource(node, 1, &res);
> 
> of_address_to_resource() needs <linux/of_address.h>
> 
> > +	if (IS_ERR_VALUE(ret))
> 
> This needs <linux/err.h>
> 
> > +		return -EIO;
> > +
> > +	xbar = devm_ioremap(dev, res.start, resource_size(&res));
> > +	if (!xbar)
> > +		return -ENOMEM;
> > +
> > +	ret = edma_of_read_u32_to_s16_array(node,
> > +					    "ti,edma-xbar-event-map",
> > +					    (s16 *)xbar_chans,
> > +					    len/sizeof(u32));
> > +	if (IS_ERR_VALUE(ret))
> > +		return -EIO;
> > +
> > +	for (i = 0; xbar_chans[i][0] != -1; i++) {
> > +		shift = (xbar_chans[i][1] % 4) * 8;
> > +		offset = xbar_chans[i][1] >> 2;
> > +		offset <<= 2;
> > +		mux = readl((void *)((u32)xbar + offset));
> > +		mux &= ~(0xff << shift);
> > +		mux |= xbar_chans[i][0] << shift;
> > +		writel(mux, (void *)((u32)xbar + offset));
> > +	}
> > +
> > +	pdata->xbar_chans = xbar_chans;
> 
> There is no member xbar_chans ATM. It seems to be introduced in 03/10.
> 
> > +
> > +static struct of_dma_filter_info edma_filter_info = {
> 
> of_dma_filter_info needs <linux/of_dma.h>.
> 
> > +	.filter_fn = edma_filter_fn,
> 
> edma_filter_fn needs <linux/edma.h>
> 
> BTW, I am not sure if you really intended to introduce EDMA DT support
> in this patch. I thought 1/10 was supposed to just move EDMA private API
> to a common place. If you really want to introduce DT support as well,
> that should be noted in the description. I think it is better done in a
> later patch.

This was a complete fubared rebase for this patch. As you noticed, I
got hunks from 3/10 in there and the bisect test didn't run so it was
missed. I've got this fixed up for v8 which address all these comments
that stem from that issue.

> > diff --git a/sound/soc/davinci/davinci-sffsdr.c b/sound/soc/davinci/davinci-sffsdr.c
> 
> > @@ -17,6 +17,7 @@
> >  #include <linux/timer.h>
> >  #include <linux/interrupt.h>
> >  #include <linux/platform_device.h>
> > +#include <linux/platform_data/edma.h>
> >  #include <linux/gpio.h>
> >  #include <sound/core.h>
> >  #include <sound/pcm.h>
> > @@ -28,12 +29,14 @@
> >  #include <asm/plat-sffsdr/sffsdr-fpga.h>
> >  #endif
> >  
> > -#include <mach/edma.h>
> >  
> >  #include "../codecs/pcm3008.h"
> >  #include "davinci-pcm.h"
> >  #include "davinci-i2s.h"
> >  
> > +#define DAVINCI_DMA_MCBSP_TX	2
> > +#define DAVINCI_DMA_MCBSP_RX	3
> > +
> >  /*
> >   * CLKX and CLKR are the inputs for the Sample Rate Generator.
> >   * FSX and FSR are outputs, driven by the sample Rate Generator.
> > @@ -124,7 +127,7 @@ static struct resource sffsdr_snd_resources[] = {
> >  
> >  static struct evm_snd_platform_data sffsdr_snd_data = {
> >  	.tx_dma_ch	= DAVINCI_DMA_MCBSP_TX,
> > -	.rx_dma_ch	= DAVINCI_DMA_MCBSP_RX,
> 
> > +	.rx_dma_ch	= DAVINCI_DMA_MCBAP_RX,
> 
> Typo here. Should be DAVINCI_DMA_MCBSP_RX. Unfortunately
> davinci-sffsdr.c seems to be broken already.

Ok, fixed..definitely shouldn't break it more.

-Matt