[igt-dev] [PATCH i-g-t] tests/kms_plane_multiple: Before going testing check how many planes are allowed

[Juha-Pekka Heikkila]

On 3.4.2019 11.38, Daniel Vetter wrote:
> On Tue, Apr 02, 2019 at 05:42:30PM +0300, Juha-Pekka Heikkila wrote:
>> Before start testing try out how many planes kernel will allow
>> simultaneously to be used.
> 
> This isn't enough, kernel might have other limits than just total number
> of planes. In the future this might depend upon where they are actually
> placed, how big, and all that stuff.

I think that sound like new subtest for this test. This test does 
randomize placing of planes already though.

> 
> Also, we need to randomize which planes we pick, so needs an
> igt_permute_array somewhere to avoid always using the same first planes.

that sound like good idea, I'll include it into v2.

> -Daniel
> 
>>
>> Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
>> ---
>>   tests/kms_plane_multiple.c | 32 ++++++++++++++++++++++++++------
>>   1 file changed, 26 insertions(+), 6 deletions(-)
>>
>> diff --git a/tests/kms_plane_multiple.c b/tests/kms_plane_multiple.c
>> index bfaeede..5107d9d 100644
>> --- a/tests/kms_plane_multiple.c
>> +++ b/tests/kms_plane_multiple.c
>> @@ -260,7 +260,9 @@ test_plane_position_with_output(data_t *data, enum pipe pipe,
>>   {
>>   	color_t blue  = { 0.0f, 0.0f, 1.0f };
>>   	igt_crc_t crc;
>> +	igt_plane_t *plane;
>>   	int i;
>> +	int err, c = 0;
>>   	int iterations = opt.iterations < 1 ? 1 : opt.iterations;
>>   	bool loop_forever;
>>   	char info[256];
>> @@ -274,17 +276,35 @@ test_plane_position_with_output(data_t *data, enum pipe pipe,
>>   			iterations, iterations > 1 ? "iterations" : "iteration");
>>   	}
>>   
>> -	igt_info("Testing connector %s using pipe %s with %d planes %s with seed %d\n",
>> -		 igt_output_name(output), kmstest_pipe_name(pipe), n_planes,
>> -		 info, opt.seed);
>> -
>>   	test_init(data, pipe, n_planes);
>>   
>>   	test_grab_crc(data, output, pipe, &blue, tiling);
>>   
>> +	/*
>> +	 * Find out how many planes are allowed simultaneously
>> +	 */
>> +	do {
>> +		c++;
>> +		prepare_planes(data, pipe, &blue, tiling, c, output);
>> +		err = igt_display_try_commit2(&data->display, COMMIT_ATOMIC);
>> +	} while (!err && c < n_planes);
>> +
>> +	if(err)
>> +		c--;
>> +
>> +	/*
>> +	 * clean up failed state.
>> +	 */
>> +	for_each_plane_on_pipe(&data->display, pipe, plane)
>> +		igt_plane_set_fb(plane, NULL);
>> +
>> +	igt_info("Testing connector %s using pipe %s with %d planes %s with seed %d\n",
>> +		 igt_output_name(output), kmstest_pipe_name(pipe), c,
>> +		 info, opt.seed);
>> +
>>   	i = 0;
>> -	while (i < iterations || loop_forever) {
>> -		prepare_planes(data, pipe, &blue, tiling, n_planes, output);
>> +	while ((i < iterations || loop_forever) && c > 0) {
>> +		prepare_planes(data, pipe, &blue, tiling, c, output);
>>   
>>   		igt_display_commit2(&data->display, COMMIT_ATOMIC);
>>   
>> -- 
>> 2.7.4
>>
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>