From:   Bough Chen <haibo.chen@nxp.com>
To:     Jesse Taube <mr.bossman075@gmail.com>,
        dl-linux-imx <linux-imx@nxp.com>
CC:     "mturquette@baylibre.com" <mturquette@baylibre.com>,
        "sboyd@kernel.org" <sboyd@kernel.org>,
        "robh+dt@kernel.org" <robh+dt@kernel.org>,
        "shawnguo@kernel.org" <shawnguo@kernel.org>,
        "s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
        "kernel@pengutronix.de" <kernel@pengutronix.de>,
        "festevam@gmail.com" <festevam@gmail.com>,
        "ulf.hansson@linaro.org" <ulf.hansson@linaro.org>,
        Aisheng Dong <aisheng.dong@nxp.com>,
        "stefan@agner.ch" <stefan@agner.ch>,
        "linus.walleij@linaro.org" <linus.walleij@linaro.org>,
        "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
        "arnd@arndb.de" <arnd@arndb.de>, "olof@lixom.net" <olof@lixom.net>,
        "soc@kernel.org" <soc@kernel.org>,
        "linux@armlinux.org.uk" <linux@armlinux.org.uk>,
        Abel Vesa <abel.vesa@nxp.com>,
        "adrian.hunter@intel.com" <adrian.hunter@intel.com>,
        "jirislaby@kernel.org" <jirislaby@kernel.org>,
        "giulio.benetti@benettiengineering.com" 
        <giulio.benetti@benettiengineering.com>,
        "nobuhiro1.iwamatsu@toshiba.co.jp" <nobuhiro1.iwamatsu@toshiba.co.jp>,
        "linux-clk@vger.kernel.org" <linux-clk@vger.kernel.org>,
        "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
        "linux-arm-kernel@lists.infradead.org" 
        <linux-arm-kernel@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
        "linux-gpio@vger.kernel.org" <linux-gpio@vger.kernel.org>,
        "linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>
Subject: RE: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support for
 i.MXRT series
Thread-Topic: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support for
 i.MXRT series
Thread-Index: AQHX0D0AJ7FLhc5hlkSFa85u3j6wJ6vxDoKwgB+BOoCAABHEUA==
Date:   Tue, 23 Nov 2021 04:31:49 +0000
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References: <20211102225701.98944-1-Mr.Bossman075@gmail.com>
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> -----Original Message-----
> From: Jesse Taube [mailto:mr.bossman075@gmail.com]
> Sent: 2021=E5=B9=B411=E6=9C=8823=E6=97=A5 11:14
> To: Bough Chen <haibo.chen@nxp.com>; dl-linux-imx <linux-imx@nxp.com>
> Cc: mturquette@baylibre.com; sboyd@kernel.org; robh+dt@kernel.org;
> shawnguo@kernel.org; s.hauer@pengutronix.de; kernel@pengutronix.de;
> festevam@gmail.com; ulf.hansson@linaro.org; Aisheng Dong
> <aisheng.dong@nxp.com>; stefan@agner.ch; linus.walleij@linaro.org;
> gregkh@linuxfoundation.org; arnd@arndb.de; olof@lixom.net;
> soc@kernel.org; linux@armlinux.org.uk; Abel Vesa <abel.vesa@nxp.com>;
> adrian.hunter@intel.com; jirislaby@kernel.org;
> giulio.benetti@benettiengineering.com; =
nobuhiro1.iwamatsu@toshiba.co.jp;
> linux-clk@vger.kernel.org; devicetree@vger.kernel.org;
> linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
> linux-mmc@vger.kernel.org; linux-gpio@vger.kernel.org;
> linux-serial@vger.kernel.org
> Subject: Re: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support =
for
> i.MXRT series
>=20
>=20
>=20
> On 11/2/21 22:19, Bough Chen wrote:
> >> -----Original Message-----
> >> From: Jesse Taube [mailto:mr.bossman075@gmail.com]
> >> Sent: 2021=E5=B9=B411=E6=9C=883=E6=97=A5 6:57
> >> To: dl-linux-imx <linux-imx@nxp.com>
> >> Cc: mturquette@baylibre.com; sboyd@kernel.org; robh+dt@kernel.org;
> >> shawnguo@kernel.org; s.hauer@pengutronix.de; kernel@pengutronix.de;
> >> festevam@gmail.com; ulf.hansson@linaro.org; Aisheng Dong
> >> <aisheng.dong@nxp.com>; stefan@agner.ch; linus.walleij@linaro.org;
> >> gregkh@linuxfoundation.org; arnd@arndb.de; olof@lixom.net;
> >> soc@kernel.org; linux@armlinux.org.uk; Abel Vesa =
<abel.vesa@nxp.com>;
> >> adrian.hunter@intel.com; jirislaby@kernel.org;
> >> giulio.benetti@benettiengineering.com;
> >> nobuhiro1.iwamatsu@toshiba.co.jp; Mr.Bossman075@gmail.com;
> >> linux-clk@vger.kernel.org; devicetree@vger.kernel.org;
> >> linux-arm-kernel@lists.infradead.org;
> >> linux-kernel@vger.kernel.org; linux-mmc@vger.kernel.org;
> >> linux-gpio@vger.kernel.org; linux-serial@vger.kernel.org; Jesse =
Taube
> >> <mr.bossman075@gmail.com>
> >> Subject: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support =
for
> > i.MXRT
> >> series
> >>
> >> From: Jesse Taube <mr.bossman075@gmail.com>
> >>
> >> Add support for i.MXRT1050's sdhc.
> >>
> >> Cc: Giulio Benetti <giulio.benetti@benettiengineering.com>
> >> Signed-off-by: Jesse Taube <Mr.Bossman075@gmail.com>---
> >> V1->V2:
> >> * Nothing done
> >> ---
> >>   drivers/mmc/host/sdhci-esdhc-imx.c | 7 +++++++
> >>   1 file changed, 7 insertions(+)
> >>
> >> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c
> >> b/drivers/mmc/host/sdhci-esdhc-imx.c
> >> index afaf33707d46..c852a6df5611 100644
> >> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> >> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> >> @@ -305,6 +305,12 @@ static struct esdhc_soc_data =
usdhc_imx7ulp_data
> =3D {
> >>   			| ESDHC_FLAG_PMQOS | ESDHC_FLAG_HS400
> >>   			| ESDHC_FLAG_STATE_LOST_IN_LPMODE,
> >>   };
> >> +static struct esdhc_soc_data usdhc_imxrt_data =3D {
> >> +	.flags =3D ESDHC_FLAG_USDHC | ESDHC_FLAG_MAN_TUNING
> >> +			| ESDHC_FLAG_HS200 | ESDHC_FLAG_ERR004536
> >> +			| ESDHC_FLAG_BROKEN_AUTO_CMD23,
> >> +};
> >> +
> >
> > Hi Jesse,
> > 	I have few question here.
> > 	Why only use manual tuning here? Does this usdhc don't support
> > standard tuning? or meet any issue when use standard tuning?
> No std tuning works, so does cmd23, i changed it to use them.

Okay.

> > 	Please also double check why not use ADMA in default? Any issue
> > found?
> Yes this is the output with ADMA:
> [0.00] mmc0: Unable to allocate ADMA buffers - falling back to =
standard DMA
> NOTE: I did not look into why this occurs.

If you config enough space for CMA or DMA pool, I think =
dma_alloc_corherent() should not meet issue.
ADMA descriptor do not large than one page(4KB). This is not big. Seems =
strange.

Please double check this. If this is really a limitation on imxRT, I'm =
okay to use SDMA as default.

Best Regards
Haibo chen
> >
> >
> > Best Regards
> > Haibo Chen
> >>
> >>   static struct esdhc_soc_data usdhc_imx8qxp_data =3D {
> >>   	.flags =3D ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING @@
> -357,6
> >> +363,7 @@ static const struct of_device_id imx_esdhc_dt_ids[] =3D {
> >>   	{ .compatible =3D "fsl,imx7ulp-usdhc", .data =3D =
&usdhc_imx7ulp_data, },
> >>   	{ .compatible =3D "fsl,imx8qxp-usdhc", .data =3D
> &usdhc_imx8qxp_data, },
> >>   	{ .compatible =3D "fsl,imx8mm-usdhc", .data =3D
> &usdhc_imx8mm_data, },
> >> +	{ .compatible =3D "fsl,imxrt-usdhc", .data =3D &usdhc_imxrt_data, =
},
> >>   	{ .compatible =3D "nxp,s32g2-usdhc", .data =3D =
&usdhc_s32g2_data, },
> >>   	{ /* sentinel */ }
> >>   };
> >> --
> >> 2.33.1
> >

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