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Message-ID: <b8c85e4e-d426-a68b-2d3d-704fc7675963@microchip.com>
Date: Fri, 3 Feb 2023 11:23:29 +0000
From: <Claudiu.Beznea@...rochip.com>
To: <radhey.shyam.pandey@....com>, <Nicolas.Ferre@...rochip.com>,
<davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
<pabeni@...hat.com>, <andrew@...n.ch>
CC: <git@....com>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] net: macb: Perform zynqmp dynamic configuration only for
SGMII interface
On 02.02.2023 14:26, Radhey Shyam Pandey wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
>
> In zynqmp platforms where firmware supports dynamic SGMII configuration
> but has other non-SGMII ethernet devices, it fails them with no packets
> received at the RX interface.
>
> To fix this behaviour perform SGMII dynamic configuration only
> for the SGMII phy interface.
>
> Fixes: 32cee7818111 ("net: macb: Add zynqmp SGMII dynamic configuration support")
> Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@....com>
Reviewed-by: Claudiu Beznea <claudiu.beznea@...rochip.com>
> ---
> drivers/net/ethernet/cadence/macb_main.c | 31 ++++++++++++------------
> 1 file changed, 16 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
> index 72e42820713d..6cda31520c42 100644
> --- a/drivers/net/ethernet/cadence/macb_main.c
> +++ b/drivers/net/ethernet/cadence/macb_main.c
> @@ -4627,25 +4627,26 @@ static int init_reset_optional(struct platform_device *pdev)
> if (ret)
> return dev_err_probe(&pdev->dev, ret,
> "failed to init SGMII PHY\n");
> - }
>
> - ret = zynqmp_pm_is_function_supported(PM_IOCTL, IOCTL_SET_GEM_CONFIG);
> - if (!ret) {
> - u32 pm_info[2];
> + ret = zynqmp_pm_is_function_supported(PM_IOCTL, IOCTL_SET_GEM_CONFIG);
> + if (!ret) {
> + u32 pm_info[2];
> +
> + ret = of_property_read_u32_array(pdev->dev.of_node, "power-domains",
> + pm_info, ARRAY_SIZE(pm_info));
> + if (ret) {
> + dev_err(&pdev->dev, "Failed to read power management information\n");
> + goto err_out_phy_exit;
> + }
> + ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_FIXED, 0);
> + if (ret)
> + goto err_out_phy_exit;
>
> - ret = of_property_read_u32_array(pdev->dev.of_node, "power-domains",
> - pm_info, ARRAY_SIZE(pm_info));
> - if (ret) {
> - dev_err(&pdev->dev, "Failed to read power management information\n");
> - goto err_out_phy_exit;
> + ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_SGMII_MODE, 1);
> + if (ret)
> + goto err_out_phy_exit;
> }
> - ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_FIXED, 0);
> - if (ret)
> - goto err_out_phy_exit;
>
> - ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_SGMII_MODE, 1);
> - if (ret)
> - goto err_out_phy_exit;
> }
>
> /* Fully reset controller at hardware level if mapped in device tree */
> --
> 2.25.1
>
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