linux-kernel - Re: [PATCH v2 3/9] PCI: rockchip: Assert PCI Configuration Enable bit after probe

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Message-ID: <f8db1d50-5771-44e0-cb39-64425966f35f@opensource.wdc.com>
Date:   Wed, 15 Feb 2023 08:58:16 +0900
From:   Damien Le Moal <damien.lemoal@...nsource.wdc.com>
To:     Rick Wertenbroek <rick.wertenbroek@...il.com>,
        alberto.dassatti@...g-vd.ch
Cc:     xxm@...k-chips.com, rick.wertenbroek@...g-vd.ch,
        stable@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jani Nikula <jani.nikula@...el.com>,
        Mikko Kovanen <mikko.kovanen@...amobile.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH v2 3/9] PCI: rockchip: Assert PCI Configuration Enable bit
 after probe

On 2/14/23 23:08, Rick Wertenbroek wrote:
> Assert PCI Configuration Enable bit after probe. When this bit is left to
> 0 in the endpoint mode, the RK3399 PCIe endpoint core will generate
> configuration request retry status (CRS) messages back to the root complex.
> Assert this bit after probe to allow the RK3399 PCIe endpoint core to reply
> to configuration requests from the root complex.
> This is documented in section 17.5.8.1.2 of the RK3399 TRM.
> 
> Fixes: cf590b078391 ("PCI: rockchip: Add EP driver for Rockchip PCIe controller")
> Cc: stable@...r.kernel.org
> Signed-off-by: Rick Wertenbroek <rick.wertenbroek@...il.com>

Reviewed-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>
Tested-by: Damien Le Moal <damien.lemoal@...nsource.wdc.com>

-- 
Damien Le Moal
Western Digital Research