linux-kernel - Re: [PATCH 3/3] net: stmmac: dwmac-rk: Use DELAY

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Message-ID: <8323ba9aba1155004bcd201b4fd7b2fa@manjaro.org>
Date: Thu, 06 Mar 2025 22:33:23 +0100
From: Dragan Simic <dsimic@...jaro.org>
To: Jonas Karlman <jonas@...boo.se>
Cc: Heiko Stuebner <heiko@...ech.de>, Andrew Lunn <andrew+netdev@...n.ch>,
 "David S . Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, Maxime Coquelin <mcoquelin.stm32@...il.com>, Alexandre
 Torgue <alexandre.torgue@...s.st.com>, David Wu <david.wu@...k-chips.com>,
 Sebastian Reichel <sebastian.reichel@...labora.com>, netdev@...r.kernel.org,
 linux-rockchip@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH 3/3] net: stmmac: dwmac-rk: Use DELAY_ENABLE macro for
 RK3588

Hello Jonas,

On 2025-03-06 21:38, Jonas Karlman wrote:
> Support for Rockchip RK3588 GMAC was added without use of the
> DELAY_ENABLE macro to assist with enable/disable use of MAC rx/tx 
> delay.
> 
> Change to use a variant of the DELAY_ENABLE macro to help disable MAC
> delay when RGMII_ID/RXID/TXID is used.
> 
> Fixes: 2f2b60a0ec28 ("net: ethernet: stmmac: dwmac-rk: Add gmac
> support for rk3588")
> Signed-off-by: Jonas Karlman <jonas@...boo.se>
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> index 37eb86e4e325..79db81d68afd 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-rk.c
> @@ -91,6 +91,10 @@ struct rk_priv_data {
>  	(((tx) ? soc##_GMAC_TXCLK_DLY_ENABLE : soc##_GMAC_TXCLK_DLY_DISABLE) 
> | \
>  	 ((rx) ? soc##_GMAC_RXCLK_DLY_ENABLE : soc##_GMAC_RXCLK_DLY_DISABLE))
> 
> +#define DELAY_ENABLE_BY_ID(soc, tx, rx, id) \
> +	(((tx) ? soc##_GMAC_TXCLK_DLY_ENABLE(id) : 
> soc##_GMAC_TXCLK_DLY_DISABLE(id)) | \
> +	 ((rx) ? soc##_GMAC_RXCLK_DLY_ENABLE(id) : 
> soc##_GMAC_RXCLK_DLY_DISABLE(id)))
> +
>  #define PX30_GRF_GMAC_CON1		0x0904
> 
>  /* PX30_GRF_GMAC_CON1 */
> @@ -1322,8 +1326,7 @@ static void rk3588_set_to_rgmii(struct
> rk_priv_data *bsp_priv,
>  		     RK3588_GMAC_CLK_RGMII_MODE(id));
> 
>  	regmap_write(bsp_priv->grf, RK3588_GRF_GMAC_CON7,
> -		     RK3588_GMAC_RXCLK_DLY_ENABLE(id) |
> -		     RK3588_GMAC_TXCLK_DLY_ENABLE(id));
> +		     DELAY_ENABLE_BY_ID(RK3588, tx_delay, rx_delay, id));
> 
>  	regmap_write(bsp_priv->grf, offset_con,
>  		     RK3588_GMAC_CLK_RX_DL_CFG(rx_delay) |

Thanks for this patch...  It's looking good to me, and good job
spotting this issue!  Please, free to include:

Reviewed-by: Dragan Simic <dsimic@...jaro.org>