[Intel-gfx] [PATCH 1/4] drm/i915: fix guest virtual PCH detection on non-PCH systems

[Jani Nikula]

On Thu, 31 May 2018, Lucas De Marchi <lucas.de.marchi at gmail.com> wrote:
> On Thu, May 31, 2018 at 02:56:21PM +0300, Jani Nikula wrote:
>> Virtualized non-PCH systems such as Broxton or Geminilake should use
>> PCH_NONE to indicate no PCH rather than PCH_NOP. The latter is a
>> specific case to indicate a PCH system without south display.
>
> Then let's go ahead and document it?

Please avoid sending suggestion patches in-reply-to existing
series. This confused patchwork and screwed up CI for the series, which
was already a resend just to get CI. :(

I'm resending the series, with your documentation patch added, but I'm
keeping the extra explanatory text in the last patch. I think it's
warranted.

BR,
Jani.


>
> -------------
> Subject: [PATCH] drm/i915: document PCH_NOP
>
> There's a difference between PCH_NONE and PCH_NOP: the former means we
> don't have a PCH while in the latter we do, but it doesn't have the
> south display.
>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
> ---
>  drivers/gpu/drm/i915/i915_drv.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
> index 72150f89f200..aa395a898258 100644
> --- a/drivers/gpu/drm/i915/i915_drv.h
> +++ b/drivers/gpu/drm/i915/i915_drv.h
> @@ -631,7 +631,7 @@ enum intel_pch {
>  	PCH_KBP,        /* Kaby Lake PCH */
>  	PCH_CNP,        /* Cannon Lake PCH */
>  	PCH_ICP,	/* Ice Lake PCH */
> -	PCH_NOP,
> +	PCH_NOP,	/* PCH without south display */
>  };
>  
>  enum intel_sbi_destination {

-- 
Jani Nikula, Intel Open Source Graphics Center