[Intel-gfx] [PATCH 4/5] drm/i915/mtl: Synchronize i915/BIOS on C6 enabling

[Radhakrishna Sripada]

On Thu, Apr 20, 2023 at 01:05:27PM -0700, Umesh Nerlige Ramappa wrote:
> On Thu, Mar 16, 2023 at 01:25:48PM -0700, Radhakrishna Sripada wrote:
> > From: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
> > 
> > If BIOS enables/disables C6, i915 should do the same. Also, retain
> > this value across driver reloads. This is needed only for MTL as
> > of now due to an existing bug in OA which needs C6 disabled for
> > it to function. BIOS behavior is also different across platforms
> > in terms of how C6 is enabled.
> > 
> > v2: Review comments (Umesh)
> > v3: Cache the C6 enable value for all MTL. The OA WA is needed only
> > for A/B step, but we don't need to check for that here.
> > v4: Rename to mtl_check_bios_c6_setup()
> > 
> > Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
> > Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada at intel.com>
> 
> This one's already pushed with the MTL OA series.
Thank you for the update. Skipped this patch in the latest rev at [1].

[1] https://patchwork.freedesktop.org/series/115292/#rev3

- Radhakrishna Sripada
> 
> Regards,
> Umesh