[PATCH v2] dmaengine: imx-sdma: Refine spba bus searching in probe

[Marco Felsch]

On 26-04-07, Shengjiu Wang wrote:
> There are multi spba-busses for i.MX8M* platforms, if only search for
> the first spba-bus in DT, the found spba-bus may not the real bus of
> audio devices, which cause issue for sdma p2p case, as the sdma p2p
> script presently does not deal with the transactions involving two devices
> connected to the AIPS bus.
> 
> Search the SDMA parent node first, which should be the AIPS bus, then
> search the child node whose compatible string is spba-bus under that AIPS
> bus for the above multi spba-busses case.

Sorry but I've to NACK this, I already fixed it in a more robust way by
checking the consumer sdma node.

Regards,
  Marco


> Fixes: 8391ecf465ec ("dmaengine: imx-sdma: Add device to device support")
> Signed-off-by: Shengjiu Wang <shengjiu.wang at nxp.com>
> ---
> changes in v2:
> - add fixes tag
> - use __free(device_node) for auto release.
> 
>  drivers/dma/imx-sdma.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index 3d527883776b..36368835a845 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -2364,7 +2364,9 @@ static int sdma_probe(struct platform_device *pdev)
>  			return dev_err_probe(&pdev->dev, ret,
>  					     "failed to register controller\n");
>  
> -		spba_bus = of_find_compatible_node(NULL, NULL, "fsl,spba-bus");
> +		struct device_node *sdma_parent_np __free(device_node) = of_get_parent(np);
> +
> +		spba_bus = of_get_compatible_child(sdma_parent_np, "fsl,spba-bus");
>  		ret = of_address_to_resource(spba_bus, 0, &spba_res);
>  		if (!ret) {
>  			sdma->spba_start_addr = spba_res.start;
> -- 
> 2.34.1
> 
> 
> 

-- 
#gernperDu 
#CallMeByMyFirstName

Pengutronix e.K.                           |                             |
Steuerwalder Str. 21                       | https://www.pengutronix.de/ |
31137 Hildesheim, Germany                  | Phone: +49-5121-206917-0    |
Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-9    |