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

[Belgaumkar, Vinay]

On 6/26/2023 8:17 PM, Dixit, Ashutosh wrote:
> On Mon, 26 Jun 2023 19:12:18 -0700, Vinay Belgaumkar wrote:
>> 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)));
> Maybe just add at the end of the previous guc_warn?

Its already too long a line. If I try adding on the next line checkpatch 
complains about splitting double quotes.

Thanks,

Vinay.

>
>>   	} 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
>>