[PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to detect card

[PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to detect card

[Yangbo Lu]

Enable interrupt mode to detect card instead of polling mode
for P1020/P4080/P5020/P5040/T1040 by removing the quirk
SDHCI_QUIRK_BROKEN_CARD_DETECTION. This could improve data
transferring performance and avoid the call trace caused by
polling card status sometime.

Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com>
---
 drivers/mmc/host/sdhci-pltfm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
index c5b01d6..62f4049 100644
--- a/drivers/mmc/host/sdhci-pltfm.c
+++ b/drivers/mmc/host/sdhci-pltfm.c
@@ -102,6 +102,13 @@ void sdhci_get_of_property(struct platform_device *pdev)
 		    of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
 			host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
 
+		if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
+			of_device_is_compatible(np, "fsl,p5020-esdhc") ||
+			of_device_is_compatible(np, "fsl,p4080-esdhc") ||
+			of_device_is_compatible(np, "fsl,p1020-esdhc") ||
+			of_device_is_compatible(np, "fsl,t1040-esdhc"))
+			host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
+
 		clk = of_get_property(np, "clock-frequency", &size);
 		if (clk && size == sizeof(*clk) && *clk)
 			pltfm_host->clock = be32_to_cpup(clk);
-- 
2.1.0.27.g96db324

Re: [PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to detect card

[Scott Wood]

On Wed, 2015-05-13 at 16:20 +0800, Yangbo Lu wrote:
> Enable interrupt mode to detect card instead of polling mode
> for P1020/P4080/P5020/P5040/T1040 by removing the quirk
> SDHCI_QUIRK_BROKEN_CARD_DETECTION. This could improve data
> transferring performance and avoid the call trace caused by
> polling card status sometime.
> 
> Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com>
> ---
>  drivers/mmc/host/sdhci-pltfm.c | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/drivers/mmc/host/sdhci-pltfm.c b/drivers/mmc/host/sdhci-pltfm.c
> index c5b01d6..62f4049 100644
> --- a/drivers/mmc/host/sdhci-pltfm.c
> +++ b/drivers/mmc/host/sdhci-pltfm.c
> @@ -102,6 +102,13 @@ void sdhci_get_of_property(struct platform_device *pdev)
>  		    of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
>  			host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
>  
> +		if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
> +			of_device_is_compatible(np, "fsl,p5020-esdhc") ||
> +			of_device_is_compatible(np, "fsl,p4080-esdhc") ||
> +			of_device_is_compatible(np, "fsl,p1020-esdhc") ||
> +			of_device_is_compatible(np, "fsl,t1040-esdhc"))
> +			host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;

Please don't line up continuation lines with the if-body.  All of the
"of_device_is_compatibles" should start in the same column.

Given that you need to modify the device tree for this, why not just use
SVR?

-Scott

Re: [PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to detect card

[Scott Wood]

On Thu, 2015-05-14 at 01:29 -0500, Lu Yangbo-B47093 wrote:
> 
> 
> > -----Original Message-----
> > From: Wood Scott-B07421
> > Sent: Thursday, May 14, 2015 12:37 AM
> > To: Lu Yangbo-B47093
> > Cc: linuxppc-dev@lists.ozlabs.org; linux-kernel@vger.kernel.org
> > Subject: Re: [PATCH 2/2] mmc: sdhci-pltfm: enable interrupt mode to
> > detect card
> > 
> > On Wed, 2015-05-13 at 16:20 +0800, Yangbo Lu wrote:
> > > Enable interrupt mode to detect card instead of polling mode for
> > > P1020/P4080/P5020/P5040/T1040 by removing the quirk
> > > SDHCI_QUIRK_BROKEN_CARD_DETECTION. This could improve data
> > > transferring performance and avoid the call trace caused by polling
> > > card status sometime.
> > >
> > > Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com>
> > > ---
> > >  drivers/mmc/host/sdhci-pltfm.c | 7 +++++++
> > >  1 file changed, 7 insertions(+)
> > >
> > > diff --git a/drivers/mmc/host/sdhci-pltfm.c
> > > b/drivers/mmc/host/sdhci-pltfm.c index c5b01d6..62f4049 100644
> > > --- a/drivers/mmc/host/sdhci-pltfm.c
> > > +++ b/drivers/mmc/host/sdhci-pltfm.c
> > > @@ -102,6 +102,13 @@ void sdhci_get_of_property(struct platform_device
> > *pdev)
> > >  		    of_device_is_compatible(np, "fsl,mpc8536-esdhc"))
> > >  			host->quirks |= SDHCI_QUIRK_BROKEN_TIMEOUT_VAL;
> > >
> > > +		if (of_device_is_compatible(np, "fsl,p5040-esdhc") ||
> > > +			of_device_is_compatible(np, "fsl,p5020-esdhc") ||
> > > +			of_device_is_compatible(np, "fsl,p4080-esdhc") ||
> > > +			of_device_is_compatible(np, "fsl,p1020-esdhc") ||
> > > +			of_device_is_compatible(np, "fsl,t1040-esdhc"))
> > > +			host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
> > 
> > Please don't line up continuation lines with the if-body.  All of the
> > "of_device_is_compatibles" should start in the same column.
> Ok, thanks.
> > 
> > Given that you need to modify the device tree for this, why not just use
> > SVR?
> The drivers/mmc/host/sdhci-pltfm.c is not only used by freescale platform. So we couldn’t to use SVR here.
> Thanks. 

I'm sure there'd be ways of rearranging it to make it work, but OK.

Please send these patches to the MMC list and maintainer (and CC me).  I
can ACK the first one or apply it separately.

-Scott