[Intel-gfx] [PATCH i-g-t] tests/kms: increase max threshold time for edid read

[Clint Taylor]

On 08/08/2017 12:51 AM, Lofstedt, Marta wrote:
> Thanks Clinton!
>
> If you add:
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100047
>
> You have my Rb.
> /Marta

Thanks Marta,
     However I'm going to extend the functionality to read the EDID 
block size like Daniel suggested. During testing today of the new edid 
size read SKL passed and IVB failed. This may be a result of an actual 
HDMI port vs LSPCON. More testing is required before I have a actual 
working test.

-Clint
>
>> -----Original Message-----
>> From: Intel-gfx [mailto:intel-gfx-bounces at lists.freedesktop.org] On Behalf
>> Of clinton.a.taylor at intel.com
>> Sent: Friday, August 4, 2017 9:23 PM
>> To: intel-gfx at lists.freedesktop.org
>> Subject: [Intel-gfx] [PATCH i-g-t] tests/kms: increase max threshold time for
>> edid read
>>
>> From: Clint Taylor <clinton.a.taylor at intel.com>
>>
>> Current 50ms max threshold timing for an EDID read is very close to the
>> actual time for a 2 block HDMI EDID read of 48ms. Any delay like a clock
>> stretch by the EDID eeprom will cause this test to fail. A 4 block HDMI EDID
>> read takes approximately 88ms under nominal conditions, making the max
>> threshold 95ms will allow this test to pass regardless of monitor attached.
>>
>> Signed-off-by: Clint Taylor <clinton.a.taylor at intel.com>
>> ---
>>   tests/kms_sysfs_edid_timing.c | 6 +++---
>>   1 file changed, 3 insertions(+), 3 deletions(-)
>>
>> diff --git a/tests/kms_sysfs_edid_timing.c b/tests/kms_sysfs_edid_timing.c
>> index 1201388..b45e080 100644
>> --- a/tests/kms_sysfs_edid_timing.c
>> +++ b/tests/kms_sysfs_edid_timing.c
>> @@ -27,14 +27,14 @@
>>   #include <sys/stat.h>
>>
>>   #define THRESHOLD_PER_CONNECTOR	10
>> -#define THRESHOLD_TOTAL		50
>> +#define THRESHOLD_TOTAL		95
>>   #define CHECK_TIMES		15
>>
>>   IGT_TEST_DESCRIPTION("This check the time we take to read the content of
>> all "
>>   		     "the possible connectors. Without the edid -
>> ENXIO patch "
>>
>> "(http://permalink.gmane.org/gmane.comp.video.dri.devel/62083),"
>> -		     "we sometimes take a *really* long time. "
>> -		     "So let's just check for some reasonable
>> timing here");
>> +		     "we sometimes take a *really* long time. So
>> let's just "
>> +		     "check an approximate HDMI 4 block edid
>> read timing here");
>>
>>
>>   igt_simple_main
>> --
>> 1.9.1
>>
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