Re: [PATCH] igt/kms_addfb_basic: New subtest to check for fb modifier and tiling mode mismatch

[Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>]

On 07/10/15 22:07, Vivek Kasireddy wrote:
>
> Hi Tvrtko,
>
> On Wed, 7 Oct 2015 15:07:30 +0100
> Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> wrote:
>
>>
>> Hi,
>>
>> On 07/10/15 03:35, Vivek Kasireddy wrote:
>>> This new subtest will validate a Y-tiled object's tiling mode
>>> against its associated fb modifier.
>>>
>>> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
>>> Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
>>> ---
>>>    tests/kms_addfb_basic.c | 9 +++++++++
>>>    1 file changed, 9 insertions(+)
>>>
>>> diff --git a/tests/kms_addfb_basic.c b/tests/kms_addfb_basic.c
>>> index d466e4d..7ca1add 100644
>>> --- a/tests/kms_addfb_basic.c
>>> +++ b/tests/kms_addfb_basic.c
>>> @@ -373,6 +373,15 @@ static void addfb25_ytile(int fd, int gen)
>>>    		f.handles[0] = gem_bo;
>>>    	}
>>>
>>> +	igt_subtest("addfb25-Y-tiled-X-modifier-mismatch") {
>>> +		igt_require(gen >= 9);
>>> +		igt_require_fb_modifiers(fd);
>>> +		gem_set_tiling(fd, gem_bo, I915_TILING_Y, 1024*4);
>>> +
>>> +		f.modifier[0] = LOCAL_I915_FORMAT_MOD_X_TILED;
>>> +		igt_assert(drmIoctl(fd,
>>> LOCAL_DRM_IOCTL_MODE_ADDFB2, &f) < 0 && errno == EINVAL);
>>> +	}
>>> +
>>>    	igt_subtest("addfb25-Y-tiled") {
>>>    		igt_require_fb_modifiers(fd);
>>>
>>
>> Wasn't the original WARN triggered by Y tiled object and Y fb
>> modifier?
>
> Creating a new fb using a Y-tiled object and Y/X fb modifier will not
> trigger the original WARN. It'll be triggered only if the fb is going
> to be pinned -- and flipped. I am not sure how to get that WARN to be
> triggered with the existing suite of igt tests.

Ah yes, you would need to attempt display it, not even necessarily flip 
it. I am sure there are tests which do that. :) I know from recent 
activity kms_rotation_crc for example creates a Y tiled FB and displays 
it. So maybe borrow some code to start with from there.

Regards,

Tvrtko
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