[10/12] drm/xe/pm: D3Cold target state

[Poosa, Karthik]

On 01-04-2025 21:02, Anshuman Gupta wrote:
> Trade-off D3Cold target state based upon current vram usage.
> If vram usage is greater than vram_d3cold_threshold and GPU
> is VRSR capable target D3Cold state is D3Cold-VRSR
> otherwise target state is D3Cold-Off.
>
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
> ---
>   drivers/gpu/drm/xe/xe_pm.c | 14 ++++++++++++++
>   1 file changed, 14 insertions(+)
>
> diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c
> index d4149a2eace7..5db9313ae269 100644
> --- a/drivers/gpu/drm/xe/xe_pm.c
> +++ b/drivers/gpu/drm/xe/xe_pm.c
> @@ -148,6 +148,14 @@ static void xe_rpm_lockmap_release(const struct xe_device *xe)
>   			 &xe_pm_runtime_d3cold_map);
>   }
>   
> +static void xe_pm_suspend_prepare(struct xe_device *xe)
> +{
> +	if (pm_suspend_target_state == PM_SUSPEND_TO_IDLE)
> +		xe_pm_d3cold_allowed_toggle(xe);
> +	else
> +		xe->d3cold.target_state = XE_D3COLD_OFF;
> +}
> +
>   /**
>    * xe_pm_suspend - Helper for System suspend, i.e. S0->S3 / S0->S2idle
>    * @xe: xe device instance
> @@ -163,6 +171,8 @@ int xe_pm_suspend(struct xe_device *xe)
>   	drm_dbg(&xe->drm, "Suspending device\n");
>   	trace_xe_pm_suspend(xe, __builtin_return_address(0));
>   
> +	xe_pm_suspend_prepare(xe);
> +
>   	err = xe_pxp_pm_suspend(xe->pxp);
>   	if (err)
>   		goto err;
> @@ -927,10 +937,14 @@ void xe_pm_d3cold_target_state_toggle(struct xe_device *xe)
>   
>   	if (total_vram_used_mb < xe->d3cold.vram_threshold)
>   		xe->d3cold.target_state = XE_D3COLD_OFF;
> +	else if (xe->d3cold.vrsr_capable)
> +		xe->d3cold.target_state = XE_D3COLD_VRSR;
>   	else
>   		xe->d3cold.target_state = XE_D3HOT;
>   
>   	mutex_unlock(&xe->d3cold.lock);
> +
> +	drm_dbg(&xe->drm, "Xe d3cold target state %d\n", xe->d3cold.allowed);
the variable should be xe->d3cold.target_state
>   }
>   
>   /**