Re: [PATCH] igt/kms_rotation_crc: Add a subtest to validate Y-tiled obj + Y fb modifier

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

On 20/10/15 02:14, Vivek Kasireddy wrote:
> Hi Tvrtko,
>
> On Mon, 19 Oct 2015 11:20:05 +0100
> Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com> wrote:
>
>>
>> Hi,
>>
>> On 17/10/15 03:47, Vivek Kasireddy wrote:
>>> The main goal of this subtest is to verify whether flipping a
>>> framebuffer with a Y fb modifier (90/270 degree rotation) and
>>> an associated Y-tiled object works or not.
>>>
>>> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
>>> Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com>
>>> ---
>>>    tests/kms_rotation_crc.c | 83
>>> ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 83
>>> insertions(+)
>>>
>>> diff --git a/tests/kms_rotation_crc.c b/tests/kms_rotation_crc.c
>>> index cc9847e..bb9aecb 100644
>>> --- a/tests/kms_rotation_crc.c
>>> +++ b/tests/kms_rotation_crc.c
>>> @@ -264,6 +264,83 @@ static void test_plane_rotation(data_t *data,
>>> enum igt_plane plane_type) igt_require_f(valid_tests, "no valid
>>> crtc/connector combinations found\n"); }
>>>
>>> +static void test_plane_rotation_ytiled_obj(data_t *data, enum
>>> igt_plane plane_type) +{
>>> +	igt_display_t *display = &data->display;
>>> +	uint64_t tiling = LOCAL_I915_FORMAT_MOD_Y_TILED;
>>> +	uint32_t format = DRM_FORMAT_XRGB8888;
>>> +	int bpp = igt_drm_format_to_bpp(format);
>>> +	enum igt_commit_style commit = COMMIT_LEGACY;
>>> +	int fd = data->gfx_fd;
>>> +	int valid_tests = 0;
>>> +	igt_output_t *output;
>>> +	int ret;
>>> +
>>> +	if (plane_type == IGT_PLANE_PRIMARY || plane_type ==
>>> IGT_PLANE_CURSOR) {
>>> +		igt_require(data->display.has_universal_planes);
>>> +		commit = COMMIT_UNIVERSAL;
>>> +	}
>>> +
>>> +	for_each_connected_output(display, output) {
>>> +		igt_plane_t *plane;
>>> +		drmModeModeInfo *mode =
>>> igt_output_get_mode(output);
>>> +		unsigned int w = mode->hdisplay;
>>> +		unsigned int h = mode->vdisplay;
>>> +		unsigned int stride, size;
>>> +		uint32_t gem_handle;
>>> +
>>> +		for (stride = 512; stride < (w * bpp / 8); stride
>>> *= 2)
>>> +			;
>>> +		for (size = 1024*1024; size < stride * h; size *=
>>> 2)
>>> +			;
>>> +
>>> +		gem_handle = gem_create(fd, size);
>>> +		ret = __gem_set_tiling(fd, gem_handle,
>>> I915_TILING_Y, stride);
>>> +		igt_assert(ret == 0);
>>> +
>>> +		do_or_die(__kms_addfb(fd, gem_handle, w, h, stride,
>>> +			  format, tiling,
>>> LOCAL_DRM_MODE_FB_MODIFIERS,
>>> +			  &data->fb.fb_id));
>>> +
>>> +		data->fb.width = w;
>>> +		data->fb.height = h;
>>> +		data->fb.gem_handle = gem_handle;
>>> +		data->fb.stride = stride;
>>> +		data->fb.size = size;
>>> +		data->fb.tiling = tiling;
>>> +		data->fb.drm_format = format;
>>> +
>>> +		plane = igt_output_get_plane(output, plane_type);
>>> +		igt_require(igt_plane_supports_rotation(plane));
>>> +
>>> +		igt_plane_set_fb(plane, NULL);
>>> +		igt_display_commit(display);
>>> +
>>> +		igt_plane_set_rotation(plane, data->rotation);
>>> +		paint_squares(data, mode, IGT_ROTATION_0, plane);
>>> +		igt_plane_set_fb(plane, &data->fb);
>>> +
>>> +		drmModeObjectSetProperty(fd,
>>> plane->drm_plane->plane_id,
>>> +					 DRM_MODE_OBJECT_PLANE,
>>> +					 plane->rotation_property,
>>> +					 plane->rotation);
>>> +		ret = igt_display_try_commit2(display, commit);
>>> +		igt_assert(ret == 0);
>>
>> This manages to trigger the WARN? How come since paint_squares above
>> will have created the normal VMA?
>
> Yes, this does trigger the WARN regardless of whether paint_squares is
> called or not. I am going to have to find out why the normal VMA was
> not created when paint_squares was called. And, this subtest does not
> restore the console cleanly which is something I also have to fix.

Could be that normal VMA is not created in the Cairo rendering path for 
Y tiled buffers. Since the final rendering is done via a blit and if you 
have PPGTT that would do it I think.

If PPGTT is always true for gen9 then this could work.

Regards,

Tvrtko
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