[Intel-gfx] [RFC 3/4] drm/i915: Add helpers for managing rps thresholds

[Rodrigo Vivi]

On Fri, Apr 28, 2023 at 09:14:56AM +0100, Tvrtko Ursulin wrote:
> From: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> 
> In preparation for exposing via sysfs add helpers for managing rps
> thresholds.
> 
> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> ---
>  drivers/gpu/drm/i915/gt/intel_rps.c | 36 +++++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/gt/intel_rps.h |  4 ++++
>  2 files changed, 40 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
> index a39eee444849..a5a7315f5ace 100644
> --- a/drivers/gpu/drm/i915/gt/intel_rps.c
> +++ b/drivers/gpu/drm/i915/gt/intel_rps.c
> @@ -2573,6 +2573,42 @@ int intel_rps_set_min_frequency(struct intel_rps *rps, u32 val)
>  		return set_min_freq(rps, val);
>  }
>  
> +u8 intel_rps_get_up_threshold(struct intel_rps *rps)
> +{
> +	return rps->power.up_threshold;
> +}
> +
> +static int rps_set_threshold(struct intel_rps *rps, u8 *threshold, u8 val)
> +{
> +	int ret;
> +
> +	if (val > 100)
> +		return -EINVAL;
> +
> +	ret = mutex_lock_interruptible(&rps->lock);
> +	if (ret)
> +		return ret;
> +	*threshold = val;
> +	mutex_unlock(&rps->lock);
> +
> +	return 0;
> +}
> +
> +int intel_rps_set_up_threshold(struct intel_rps *rps, u8 threshold)
> +{
> +	return rps_set_threshold(rps, &rps->power.up_threshold, threshold);
> +}
> +
> +u8 intel_rps_get_down_threshold(struct intel_rps *rps)
> +{
> +	return rps->power.down_threshold;
> +}
> +
> +int intel_rps_set_down_threshold(struct intel_rps *rps, u8 threshold)
> +{
> +	return rps_set_threshold(rps, &rps->power.down_threshold, threshold);
> +}
> +

Isn't this breaking compilation with the unused functions?

>  static void intel_rps_set_manual(struct intel_rps *rps, bool enable)
>  {
>  	struct intel_uncore *uncore = rps_to_uncore(rps);
> diff --git a/drivers/gpu/drm/i915/gt/intel_rps.h b/drivers/gpu/drm/i915/gt/intel_rps.h
> index a3fa987aa91f..92fb01f5a452 100644
> --- a/drivers/gpu/drm/i915/gt/intel_rps.h
> +++ b/drivers/gpu/drm/i915/gt/intel_rps.h
> @@ -37,6 +37,10 @@ void intel_rps_mark_interactive(struct intel_rps *rps, bool interactive);
>  
>  int intel_gpu_freq(struct intel_rps *rps, int val);
>  int intel_freq_opcode(struct intel_rps *rps, int val);
> +u8 intel_rps_get_up_threshold(struct intel_rps *rps);
> +int intel_rps_set_up_threshold(struct intel_rps *rps, u8 threshold);
> +u8 intel_rps_get_down_threshold(struct intel_rps *rps);
> +int intel_rps_set_down_threshold(struct intel_rps *rps, u8 threshold);
>  u32 intel_rps_read_actual_frequency(struct intel_rps *rps);
>  u32 intel_rps_read_actual_frequency_fw(struct intel_rps *rps);
>  u32 intel_rps_get_requested_frequency(struct intel_rps *rps);
> -- 
> 2.37.2
>