[PATCH] drm/i915: Let's avoid even early init if SLPC is used.

[Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>]

SLPC has its own waiboost variables and lock mechanism.
No need for these extra stuff, in special no need for the
timer.

v2: At early stages we can't use uc's 'uses' function, but the
    'wants' ones in order to make those decisions.

Cc: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
---
 drivers/gpu/drm/i915/gt/intel_rps.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/intel_rps.c b/drivers/gpu/drm/i915/gt/intel_rps.c
index 28b399fa1abe..f0c75f088c88 100644
--- a/drivers/gpu/drm/i915/gt/intel_rps.c
+++ b/drivers/gpu/drm/i915/gt/intel_rps.c
@@ -57,6 +57,13 @@ static bool rps_uses_slpc(struct intel_rps *rps)
 	return intel_uc_uses_guc_slpc(&gt->uc);
 }
 
+static bool rps_wants_slpc(struct intel_rps *rps)
+{
+	struct intel_gt *gt = rps_to_gt(rps);
+
+	return intel_uc_wants_guc_slpc(&gt->uc);
+}
+
 static u32 rps_pm_sanitize_mask(struct intel_rps *rps, u32 mask)
 {
 	return mask & ~rps->pm_intrmsk_mbz;
@@ -1955,6 +1962,9 @@ void gen5_rps_irq_handler(struct intel_rps *rps)
 
 void intel_rps_init_early(struct intel_rps *rps)
 {
+	if (rps_wants_slpc(rps))
+		return;
+
 	mutex_init(&rps->lock);
 	mutex_init(&rps->power.mutex);
 
-- 
2.37.2