[PATCH] drm/i915/selftests: Add RPS debug info for power test failure

[Sk Anirban]

Add debug logging to show RPS frequency configuration when the
live_rps_power selftest fails to conserve power at lower frequencies.
This helps diagnose frequency scaling issues by showing max_freq,
rp0_freq, and max_freq_softlimit values.

Closes: https://gitlab.freedesktop.org/drm/i915/kernel/-/issues/13774

Signed-off-by: Sk Anirban <sk.anirban at intel.com>
---
 drivers/gpu/drm/i915/gt/selftest_rps.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/selftest_rps.c b/drivers/gpu/drm/i915/gt/selftest_rps.c
index 73bc91c6ea07..4012213ab1b7 100644
--- a/drivers/gpu/drm/i915/gt/selftest_rps.c
+++ b/drivers/gpu/drm/i915/gt/selftest_rps.c
@@ -1216,6 +1216,11 @@ int live_rps_power(void *arg)
 		if (11 * min.power > 10 * max.power) {
 			pr_err("%s: did not conserve power when setting lower frequency!\n",
 			       engine->name);
+			pr_debug("%s: RPS Debug - max_freq:%u:%uMHz, rp0_freq:%u:%uMHz, max_freq_softlimit:%u:%uMHz\n",
+				 engine->name, rps->max_freq, intel_gpu_freq(rps, rps->max_freq),
+				 rps->rp0_freq, intel_gpu_freq(rps, rps->rp0_freq),
+				 rps->max_freq_softlimit, intel_gpu_freq(rps,
+				 rps->max_freq_softlimit));
 			err = -EINVAL;
 			break;
 		}
-- 
2.43.0