[PATCH 6/7] PCI: imx6: Fix link start operation

[Marek Vasut]

Dear Marek Vasut,

> This patch first forces the link into Gen1 mode before starting up
> the link and only after the link is up requests the link to start
> negotiating possible Gen2 mode operation. This is because without
> such sequence, some PCIe switches are not detected at all.

[...]

> +	/* Make sure link training is finished as well! */
> +	if (count)
> +		ret = imx6_pcie_wait_for_link(pp);
> +	else
> +		ret = -EINVAL;
> 
> +	if (ret) {
> +		dev_err(pp->dev, "Failed to bring link up!\n");
> +	} else {
> +		tmp = readl(pp->dbi_base + 0x80);
> +		dev_err(pp->dev, "Link up, Gen=%i\n", (tmp >> 16) & 0xf);

Hm meh, this dev_err() shouldn't be here of course. But I'd be interested if you 
people now get stable Gen2 link up properly all the time. Please test. Thanks!

[...]
Best regards,
Marek Vasut