linux-kernel - RE: [PATCH v1 1/1] dmaengine: fsl-edma: optimize edma driver for imx8QM

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Message-ID:
 <AS4PR04MB9386E7A6EB263F6AC6819278E1052@AS4PR04MB9386.eurprd04.prod.outlook.com>
Date: Thu, 11 Apr 2024 02:45:53 +0000
From: Joy Zou <joy.zou@....com>
To: Frank Li <frank.li@....com>
CC: Peng Fan <peng.fan@....com>, "vkoul@...nel.org" <vkoul@...nel.org>,
	"imx@...ts.linux.dev" <imx@...ts.linux.dev>, "dmaengine@...r.kernel.org"
	<dmaengine@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v1 1/1] dmaengine: fsl-edma: optimize edma driver for
 imx8QM


> -----Original Message-----
> From: Frank Li <frank.li@....com>
> Sent: 2024年4月11日 10:41
> To: Joy Zou <joy.zou@....com>
> Cc: Peng Fan <peng.fan@....com>; vkoul@...nel.org; imx@...ts.linux.dev;
> dmaengine@...r.kernel.org; linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v1 1/1] dmaengine: fsl-edma: optimize edma driver for
> imx8QM
> 
> On Thu, Apr 11, 2024 at 10:44:17AM +0800, Joy Zou wrote:
> > The eDMA hardware issue only exist imx8QM A0. A0 never mass
> production.
> > So remove the workaround safely.
> >
> > Signed-off-by: Joy Zou <joy.zou@....com>
> > ---
> >  drivers/dma/fsl-edma-common.c | 16 ++++------------
> >  drivers/dma/fsl-edma-main.c   |  8 --------
> >  2 files changed, 4 insertions(+), 20 deletions(-)
> >
> > diff --git a/drivers/dma/fsl-edma-common.c
> > b/drivers/dma/fsl-edma-common.c index f9144b015439..ed93e01282d5
> > 100644
> > --- a/drivers/dma/fsl-edma-common.c
> > +++ b/drivers/dma/fsl-edma-common.c
> > @@ -75,18 +75,10 @@ static void fsl_edma3_enable_request(struct
> > fsl_edma_chan *fsl_chan)
> >
> >  	flags = fsl_edma_drvflags(fsl_chan);
> >  	val = edma_readl_chreg(fsl_chan, ch_sbr);
> > -	/* Remote/local swapped wrongly on iMX8 QM Audio edma */
> > -	if (flags & FSL_EDMA_DRV_QUIRK_SWAPPED) {
> > -		if (!fsl_chan->is_rxchan)
> > -			val |= EDMA_V3_CH_SBR_RD;
> > -		else
> > -			val |= EDMA_V3_CH_SBR_WR;
> > -	} else {
> > -		if (fsl_chan->is_rxchan)
> > -			val |= EDMA_V3_CH_SBR_RD;
> > -		else
> > -			val |= EDMA_V3_CH_SBR_WR;
> > -	}
> > +	if (fsl_chan->is_rxchan)
> > +		val |= EDMA_V3_CH_SBR_RD;
> > +	else
> > +		val |= EDMA_V3_CH_SBR_WR;
> >
> >  	if (fsl_chan->is_remote)
> >  		val &= ~(EDMA_V3_CH_SBR_RD | EDMA_V3_CH_SBR_WR); diff --git
> > a/drivers/dma/fsl-edma-main.c b/drivers/dma/fsl-edma-main.c index
> > 755a3dc3b0a7..b06fa147d6ba 100644
> > --- a/drivers/dma/fsl-edma-main.c
> > +++ b/drivers/dma/fsl-edma-main.c
> > @@ -349,13 +349,6 @@ static struct fsl_edma_drvdata imx8qm_data = {
> >  	.setup_irq = fsl_edma3_irq_init,
> >  };
> >
> > -static struct fsl_edma_drvdata imx8qm_audio_data = {
> > -	.flags = FSL_EDMA_DRV_QUIRK_SWAPPED | FSL_EDMA_DRV_HAS_PD |
> FSL_EDMA_DRV_EDMA3,
> > -	.chreg_space_sz = 0x10000,
> > -	.chreg_off = 0x10000,
> > -	.setup_irq = fsl_edma3_irq_init,
> > -};
> > -
> >  static struct fsl_edma_drvdata imx8ulp_data = {
> >  	.flags = FSL_EDMA_DRV_HAS_CHMUX | FSL_EDMA_DRV_HAS_CHCLK |
> FSL_EDMA_DRV_HAS_DMACLK |
> >  		 FSL_EDMA_DRV_EDMA3,
> > @@ -397,7 +390,6 @@ static const struct of_device_id fsl_edma_dt_ids[] =
> {
> >  	{ .compatible = "fsl,ls1028a-edma", .data = &ls1028a_data},
> >  	{ .compatible = "fsl,imx7ulp-edma", .data = &imx7ulp_data},
> >  	{ .compatible = "fsl,imx8qm-edma", .data = &imx8qm_data},
> > -	{ .compatible = "fsl,imx8qm-adma", .data = &imx8qm_audio_data},
> 
> Please update binding doc also.
Thanks for your comments!
Yeah, will add bindings update on next version.
BR
Joy Zou
> 
> Frank Li
> 
> >  	{ .compatible = "fsl,imx8ulp-edma", .data = &imx8ulp_data},
> >  	{ .compatible = "fsl,imx93-edma3", .data = &imx93_data3},
> >  	{ .compatible = "fsl,imx93-edma4", .data = &imx93_data4},
> > --
> > 2.37.1
> >