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

[Tvrtko Ursulin]

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 343a50188c5e..c02b7104d11e 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);
+}
+
 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