Re: [PATCH net-next v3 2/2] net: stmmac: qcom-ethqos: enable SGMII loopback during DMA reset on sa8775p-ride-r3

[Andrew Lunn]

On Wed, Jul 03, 2024 at 08:14:59PM +0200, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>
> 
> On sa8775p-ride-r3 the RX clocks from the AQR115C PHY are not available at
> the time of the DMA reset. We can however extract the RX clock from the
> internal SERDES block. Once the link is up, we can revert to the
> previous state.
> 
> The AQR115C PHY doesn't support in-band signalling so we can count on
> getting the link up notification and safely reuse existing callbacks
> which are already used by another HW quirk workaround which enables the
> functional clock to avoid a DMA reset due to timeout.
> 
> Only enable loopback on revision 3 of the board - check the phy_mode to
> make sure.
> 
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxx>

Reviewed-by: Andrew Lunn <andrew@xxxxxxx>

    Andrew