[PATCH v2 17/17] drm/i915/xe3lpd: Use DMC wakelock by default

[Luca Coelho]

On Wed, 2024-11-06 at 18:50 -0300, Gustavo Sousa wrote:
> Although Bspec doesn't explicitly mentions that, as of Xe3_LPD, using
> DMC wakelock is the officially recommended way of accessing registers
> that would be off during DC5/DC6 and the legacy method (where the DMC
> intercepts MMIO to wake up the hardware) is to be avoided.
> 
> As such, update the driver to use the DMC wakelock by default starting
> with Xe3_LPD. Since the feature is somewhat new to the driver, also
> allow disabling it via a module parameter for debugging purposes.
> 
> For that, make the existing parameter allow values -1 (per-chip
> default), 0 (disabled) and 1 (enabled), similarly to what is done for
> other parameters.
> 
> v2:
>   - Describe -1 in the same area where 0 and 1 are described. (Luca)
> 
> Cc: Luca Coelho <luciano.coelho at intel.com>
> Signed-off-by: Gustavo Sousa <gustavo.sousa at intel.com>
> ---
> 

Reviewed-by: Luca Coelho <luciano.coelho at intel.com>

--
Cheers,
Luca.