[Bug 76490] Hang during boot when DPM is on (R9 270X)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=76490

--- Comment #118 from Alex Deucher <alexdeucher at gmail.com> ---
(In reply to Daniel Exner from comment #117)
> (In reply to Alex Deucher from comment #116)
> > Created attachment 126814 [details] [review] [review]
> > possible fix
> > 
> > Does this patch help?
> 
> I applied the patch on Kernel 4.8.0-rc8-00771-g8ab293e: result is a stable
> system as before, so at least it didn't introduce a regression.
> 
> Then I disabled the override for my card below:
> 
> diff --git a/drivers/gpu/drm/radeon/si_dpm.c
> b/drivers/gpu/drm/radeon/si_dpm.c
> index e6abc09..bcaa675 100644
> --- a/drivers/gpu/drm/radeon/si_dpm.c
> +++ b/drivers/gpu/drm/radeon/si_dpm.c
> @@ -2924,7 +2924,6 @@ struct si_dpm_quirk {
>  /* cards with dpm stability problems */
>  static struct si_dpm_quirk si_dpm_quirk_list[] = {
>         /* PITCAIRN - https://bugs.freedesktop.org/show_bug.cgi?id=76490 */
> -       { PCI_VENDOR_ID_ATI, 0x6810, 0x1462, 0x3036, 0, 120000 },
>         { PCI_VENDOR_ID_ATI, 0x6811, 0x174b, 0xe271, 0, 120000 },
>         { PCI_VENDOR_ID_ATI, 0x6811, 0x174b, 0x2015, 0, 120000 },
>         { PCI_VENDOR_ID_ATI, 0x6810, 0x174b, 0xe271, 85000, 90000 },
> 
> Result is the same as without your patch: black screen and non responsive
> system.

Ok.

> 
> Should I also revert "drm/radeon: load different smc firmware on some SI
> variants"?

No.

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