linux-kernel - Re: TI: X15 the connected SSD is not detected on Linux next 20221006 tag

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Message-ID: <ca8d3fff-0365-24d9-fd53-5799ac34f336@opensource.wdc.com>
Date:   Fri, 14 Oct 2022 09:22:34 +0900
From:   Damien Le Moal <damien.lemoal@...nsource.wdc.com>
To:     Anders Roxell <anders.roxell@...aro.org>,
        Naresh Kamboju <naresh.kamboju@...aro.org>,
        Sergey.Semin@...kalelectronics.ru
Cc:     open list <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        regressions@...ts.linux.dev,
        "open list:LIBATA SUBSYSTEM (Serial and Parallel ATA drivers)" 
        <linux-ide@...r.kernel.org>, lkft-triage@...ts.linaro.org,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        Niklas Cassel <niklas.cassel@....com>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: TI: X15 the connected SSD is not detected on Linux next 20221006
 tag

On 10/14/22 07:07, Anders Roxell wrote:
[...]
>> 8)
>>> If reverting these patches restores the eSATA port on this board, then you need
>>> to fix the defconfig for that board.
>>
>> OTOH,
>> Anders, enabled the new config CONFIG_AHCI_DWC=y  and tried but the
>> device failed to boot.
> 
> I thought it would work with enabling CONFIG_AHCI_DWC=y, but it didn't...

As mentioned in my previous reply to Naresh, this is a new driver added in
6.1. Your board was working before so this should not be the driver needed
for it.

> However, reverting patch 33629d35090f ("ata: ahci: Add DWC AHCI SATA
> controller support")
> from next-20221013 was a success, kernel booted  and the 'mkfs.ext4' cmd was
> successful.

Which is very strange... There is only one hunk in that commit that could
be considered suspicious:

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index 9b56490ecbc3..8f5572a9f8f1 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -80,9 +80,7 @@ static SIMPLE_DEV_PM_OPS(ahci_pm_ops, ahci_platform_suspend,
 static const struct of_device_id ahci_of_match[] = {
        { .compatible = "generic-ahci", },
        /* Keep the following compatibles for device tree compatibility */
-       { .compatible = "snps,spear-ahci", },
        { .compatible = "ibm,476gtr-ahci", },
-       { .compatible = "snps,dwc-ahci", },
        { .compatible = "hisilicon,hisi-ahci", },
        { .compatible = "cavium,octeon-7130-ahci", },
        { /* sentinel */ }

Is your board using one of these compatible string ?

Serge ?
Any idea ?

-- 
Damien Le Moal
Western Digital Research