Re: [PATCH] PCI: stop spamming info in quirk_nvidia_hda

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On Thu, Mar 16, 2023 at 03:31:22PM +0100, Karol Herbst wrote:
> Users kept complaining about those messages and it's a little spammy on
> prime systems so turn it into a debug print.

What is a "prime system"?

I'm a little surprised that users would really care about the message.
But I do see comments like these:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1836308/comments/15
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2002206
that suggest the message happens frequently, maybe if we're resuming
the controller after runtime suspend?

Maybe this should be a pci_info_once() sort of thing?  I think there's
some value in knowing that we're changing the BIOS configuration
outside the purview of a driver, since I assume BIOS had some reason
for hiding the HDA controller.

> Cc: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> Cc: Lukas Wunner <lukas@xxxxxxxxx>
> Cc: linux-pci@xxxxxxxxxxxxxxx
> Cc: nouveau@xxxxxxxxxxxxxxxxxxxxx
> Fixes: b516ea586d71 ("PCI: Enable NVIDIA HDA controllers")
> Signed-off-by: Karol Herbst <kherbst@xxxxxxxxxx>
> ---
>  drivers/pci/quirks.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 44cab813bf951..b10c77bbe4716 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -5549,7 +5549,7 @@ static void quirk_nvidia_hda(struct pci_dev *gpu)
>  	if (val & BIT(25))
>  		return;
>  
> -	pci_info(gpu, "Enabling HDA controller\n");
> +	pci_dbg(gpu, "Enabling HDA controller\n");
>  	pci_write_config_dword(gpu, 0x488, val | BIT(25));
>  
>  	/* The GPU becomes a multi-function device when the HDA is enabled */
> -- 
> 2.39.2
> 



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