linux-kernel - Re: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support for i.MXRT series

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Date:   Mon, 22 Nov 2021 22:13:37 -0500
From:   Jesse Taube <mr.bossman075@...il.com>
To:     Bough Chen <haibo.chen@....com>, dl-linux-imx <linux-imx@....com>
Cc:     "mturquette@...libre.com" <mturquette@...libre.com>,
        "sboyd@...nel.org" <sboyd@...nel.org>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
        Aisheng Dong <aisheng.dong@....com>,
        "stefan@...er.ch" <stefan@...er.ch>,
        "linus.walleij@...aro.org" <linus.walleij@...aro.org>,
        "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
        "arnd@...db.de" <arnd@...db.de>, "olof@...om.net" <olof@...om.net>,
        "soc@...nel.org" <soc@...nel.org>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        Abel Vesa <abel.vesa@....com>,
        "adrian.hunter@...el.com" <adrian.hunter@...el.com>,
        "jirislaby@...nel.org" <jirislaby@...nel.org>,
        "giulio.benetti@...ettiengineering.com" 
        <giulio.benetti@...ettiengineering.com>,
        "nobuhiro1.iwamatsu@...hiba.co.jp" <nobuhiro1.iwamatsu@...hiba.co.jp>,
        "linux-clk@...r.kernel.org" <linux-clk@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-serial@...r.kernel.org" <linux-serial@...r.kernel.org>
Subject: Re: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support for
 i.MXRT series



On 11/2/21 22:19, Bough Chen wrote:
>> -----Original Message-----
>> From: Jesse Taube [mailto:mr.bossman075@...il.com]
>> Sent: 2021年11月3日 6:57
>> To: dl-linux-imx <linux-imx@....com>
>> Cc: mturquette@...libre.com; sboyd@...nel.org; robh+dt@...nel.org;
>> shawnguo@...nel.org; s.hauer@...gutronix.de; kernel@...gutronix.de;
>> festevam@...il.com; ulf.hansson@...aro.org; Aisheng Dong
>> <aisheng.dong@....com>; stefan@...er.ch; linus.walleij@...aro.org;
>> gregkh@...uxfoundation.org; arnd@...db.de; olof@...om.net;
>> soc@...nel.org; linux@...linux.org.uk; Abel Vesa <abel.vesa@....com>;
>> adrian.hunter@...el.com; jirislaby@...nel.org;
>> giulio.benetti@...ettiengineering.com; nobuhiro1.iwamatsu@...hiba.co.jp;
>> Mr.Bossman075@...il.com; linux-clk@...r.kernel.org;
>> devicetree@...r.kernel.org; linux-arm-kernel@...ts.infradead.org;
>> linux-kernel@...r.kernel.org; linux-mmc@...r.kernel.org;
>> linux-gpio@...r.kernel.org; linux-serial@...r.kernel.org; Jesse Taube
>> <mr.bossman075@...il.com>
>> Subject: [PATCH v2 11/13] mmc: sdhci-esdhc-imx: Add sdhc support for
> i.MXRT
>> series
>>
>> From: Jesse Taube <mr.bossman075@...il.com>
>>
>> Add support for i.MXRT1050's sdhc.
>>
>> Cc: Giulio Benetti <giulio.benetti@...ettiengineering.com>
>> Signed-off-by: Jesse Taube <Mr.Bossman075@...il.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 = {
>>   			| ESDHC_FLAG_PMQOS | ESDHC_FLAG_HS400
>>   			| ESDHC_FLAG_STATE_LOST_IN_LPMODE,
>>   };
>> +static struct esdhc_soc_data usdhc_imxrt_data = {
>> +	.flags = 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.
> 	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.
> 	
> 
> Best Regards
> Haibo Chen
>>
>>   static struct esdhc_soc_data usdhc_imx8qxp_data = {
>>   	.flags = ESDHC_FLAG_USDHC | ESDHC_FLAG_STD_TUNING @@ -357,6
>> +363,7 @@ static const struct of_device_id imx_esdhc_dt_ids[] = {
>>   	{ .compatible = "fsl,imx7ulp-usdhc", .data = &usdhc_imx7ulp_data, },
>>   	{ .compatible = "fsl,imx8qxp-usdhc", .data = &usdhc_imx8qxp_data, },
>>   	{ .compatible = "fsl,imx8mm-usdhc", .data = &usdhc_imx8mm_data, },
>> +	{ .compatible = "fsl,imxrt-usdhc", .data = &usdhc_imxrt_data, },
>>   	{ .compatible = "nxp,s32g2-usdhc", .data = &usdhc_s32g2_data, },
>>   	{ /* sentinel */ }
>>   };
>> --
>> 2.33.1
>