linux-kernel - Re: [PATCH] mmc: core: MMC_CAP2_HS200_1_8V_SDR with mmc-hs400-1

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Date:   Tue, 1 Dec 2020 16:59:33 +0800
From:   Chris Ruehl <chris.ruehl@...ys.com.hk>
To:     Avri Altman <Avri.Altman@....com>
Cc:     Ulf Hansson <ulf.hansson@...aro.org>,
        Michał Mirosław <mirq-linux@...e.qmqm.pl>,
        "Gustavo A. R. Silva" <gustavoars@...nel.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Veerabhadrarao Badiganti <vbadigan@...eaurora.org>,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>,
        Chris Ball <chris@...ntf.net>,
        Seungwon Jeon <tgih.jun@...sung.com>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] mmc: core: MMC_CAP2_HS200_1_8V_SDR with mmc-hs400-1_8v

Hi,

I have to callback my patch,
The mmc.c logic needs the MMC_CAP2_HS200_1_8V_SDR in the current implementation.

If I want to precise use mmc-hs400-1_8v or mmc-hs200-1_8v have their
explicit code-path its needs a bigger effort.

On it.

@Avri Altman , I have to reject your ACK. :)

Chris


On 29/11/2020 8:28 pm, Avri Altman wrote:
>   
>> This patch remove the MMC_CAP2_HS200_1_8V_SDR capacity from
>> host->cap2 when the dt property mmc-hs400-1v8 set. It cause
>> error and occasionally hang on boot and reboot.
>> Board with this issue: rk3399 with SanDisk DG4008 eMMC.
>>
>> This patch did not change the mmc-hs400-1_2v host->cap2
>> added the MMC_CAP2_HS200_1_2V_SDR.
>>
>> Log shows a boot process with a HS400 5.1 capable SanDisk 8G
>> with mmc-hs400-1_8v dt property and the MMC_CAP2_HS200_1_8V_SDR
>> append to the host->cap2.
>>
>> [    1.775721] mmc1: CQHCI version 5.10
>> [    1.802342] mmc1: SDHCI controller on fe330000.sdhci [fe330000.sdhci]
>> using ADMA
>> [    2.007581] mmc1: mmc_select_hs200 failed, error -110
>> [    2.007589] mmc1: error -110 whilst initialising MMC card
>> [    2.413559] mmc1: mmc_select_hs200 failed, error -110
>> [    2.413562] mmc1: error -110 whilst initialising MMC card
>> [    3.183343] mmc1: Command Queue Engine enabled
>> [    3.183355] mmc1: new HS400 MMC card at address 0001
>> [    3.197163] mmcblk1: mmc1:0001 DG4008 7.28 GiB
>> [    3.197256] mmcblk1boot0: mmc1:0001 DG4008 partition 1 4.00 MiB
>> [    3.197360] mmcblk1boot1: mmc1:0001 DG4008 partition 2 4.00 MiB
>> [    3.197479] mmcblk1rpmb: mmc1:0001 DG4008 partition 3 4.00 MiB, chardev
>> (242:0)
>>
>> after patch applied
>> [    1.746691] mmc1: CQHCI version 5.10
>> [    1.773316] mmc1: SDHCI controller on fe330000.sdhci [fe330000.sdhci]
>> using ADMA
>> [    1.858410] mmc1: Command Queue Engine enabled
>> [    1.858418] mmc1: new HS400 MMC card at address 0001
>> [    1.858897] mmcblk1: mmc1:0001 DG4008 7.28 GiB
>> [    1.859002] mmcblk1boot0: mmc1:0001 DG4008 partition 1 4.00 MiB
>> [    1.859097] mmcblk1boot1: mmc1:0001 DG4008 partition 2 4.00 MiB
>> [    1.859182] mmcblk1rpmb: mmc1:0001 DG4008 partition 3 4.00 MiB, chardev
>> (242:0)
>>
>> Fixes: c373eb489b27b mmc: core: add DT bindings for eMMC HS400 1.8/1.2V
>>
>> Signed-off-by: Chris Ruehl <chris.ruehl@...ys.com.hk>
> Acked-by: Avri Altman <avri.altman@....com>
> 

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