[igt-dev] [PATCH i-g-t] tests/kms_psr2_su: Print the SU blocks mismatches

[Souza, Jose]

On Tue, 2020-02-25 at 09:30 +0530, Anshuman Gupta wrote:
> On 2020-02-25 at 04:47:47 +0530, Souza, Jose wrote:
> > On Mon, 2020-02-24 at 10:48 +0530, Anshuman Gupta wrote:
> > > On 2020-01-23 at 11:00:29 -0800, José Roberto de Souza wrote:
> > > > This will help us debug failures in this test.
> > > > 
> > > > Signed-off-by: José Roberto de Souza <jose.souza at intel.com>
> > > > ---
> > > >  tests/kms_psr2_su.c | 7 +++++--
> > > >  1 file changed, 5 insertions(+), 2 deletions(-)
> > > > 
> > > > diff --git a/tests/kms_psr2_su.c b/tests/kms_psr2_su.c
> > > > index f2244b29..9f40c735 100644
> > > > --- a/tests/kms_psr2_su.c
> > > > +++ b/tests/kms_psr2_su.c
> > > > @@ -183,9 +183,13 @@ static bool update_screen_and_test(data_t
> > > > *data)
> > > >  		igt_assert_f(data->op, "Operation not
> > > > handled\n");
> > > >  	}
> > > >  
> > > > -	if (psr2_wait_su(data->debugfs_fd, &su_blocks))
> > > > +	if (psr2_wait_su(data->debugfs_fd, &su_blocks)) {
> > > >  		ret = su_blocks == EXPECTED_NUM_SU_BLOCKS;
> > > >  
> > > > +		if (!ret)
> > > > +			igt_debug("Not matching SU blocks read:
> > > > %u\n",
> > > > su_blocks);
> > > AFAIU this will print the SU block for 0th frame, and looks like
> > > this test also interested only in 0th frame, i am just curious
> > > here
> > > to know the 
> > > use case of SU block for last 8 frames.
> > 
> > 0th frame?
> I referred PSR2_SU_BLOCK_STR_LOOKUP "PSR2 SU blocks:\n0\t" , as 0th
> frame.
> Frame:  PSR2 SU blocks:
> 0       0
> 1       0
> ---------
> 7       0
> What are the use of other 7 frames.

Was used to debug PSR2 during development, we could see how many
selective update blocks each of the past 8 had by just reading 3
registers. Anyways psr2_wait_su() only cares about the last frame.

> Thanks,
> Anshuman Gupta.
> > It waits up to 40mili to also handle 30hz panels, 1000/30=33mili.
> > The SU blocks should be kept set until next flip or frontbuffer
> > modification.
> > 
> > > > +	}
> > > > +
> > > >  	return ret;
> > > >  }
> > > >  
> > > > @@ -206,7 +210,6 @@ static void run(data_t *data)
> > > >  			result = update_screen_and_test(data);
> > > >  	}
> > > >  
> > > > -	igt_debug("Screen changes: %u\n", data-
> > > > >screen_changes);
> > > IMHO this seems unrealted to this patch considering its commit
> > > log,
> > > could u please
> > > add some description about removal of this log.
> > 
> > Will add, it is removing this useless debug message I probably
> > tought
> > that screen_changes would have the information that I'm adding in
> > the
> > block added in the patch.
> > 
> > > Thanks,
> > > Anshuman Gupta.
> > > >  	igt_assert_f(result,
> > > >  		     "No matching selective update blocks read
> > > > from
> > > > debugfs\n");
> > > >  }
> > > > -- 
> > > > 2.25.0
> > > > 
> > > > _______________________________________________
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