[Intel-gfx] [PATCH] drm/i915/guc: Dump perf_limit_reasons for debug

[Vinay Belgaumkar]

GuC load takes longer sometimes due to GT frequency not ramping up.
Add perf_limit_reasons to the existing warn print to see if frequency
is being throttled.

Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar at intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
index 364d0d546ec8..73911536a8e7 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_fw.c
@@ -254,6 +254,8 @@ static int guc_wait_ucode(struct intel_guc *guc)
 		guc_warn(guc, "excessive init time: %lldms! [freq = %dMHz, before = %dMHz, status = 0x%08X, count = %d, ret = %d]\n",
 			 delta_ms, intel_rps_read_actual_frequency(&uncore->gt->rps),
 			 before_freq, status, count, ret);
+		guc_warn(guc, "perf limit reasons = 0x%08X\n",
+			 intel_uncore_read(uncore, intel_gt_perf_limit_reasons_reg(gt)));
 	} else {
 		guc_dbg(guc, "init took %lldms, freq = %dMHz, before = %dMHz, status = 0x%08X, count = %d, ret = %d\n",
 			delta_ms, intel_rps_read_actual_frequency(&uncore->gt->rps),
-- 
2.38.1