linux-kernel - RE: [PATCH 2/2] mmc: core: MMC_CAP2_HS200_1_8V_SDR with mmc-hs400-1

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Date:   Sun, 29 Nov 2020 12:29:54 +0000
From:   Avri Altman <Avri.Altman@....com>
To:     Chris Ruehl <chris.ruehl@...ys.com.hk>
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>,
        Matthias Schiffer <matthias.schiffer@...tq-group.com>,
        Seungwon Jeon <tgih.jun@...sung.com>,
        Chris Ball <chris@...ntf.net>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 2/2] mmc: core: MMC_CAP2_HS200_1_8V_SDR with
 mmc-hs400-1_8v

> 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>