Re: [igt-dev] [PATCH i-g-t v4] tests/kms_atomic: add test to validate immutable zpos

["Sharma, Swati2" <swati2.sharma@intel.com>]

On 25-Mar-20 1:15 PM, Peres, Martin wrote:
> On 2020-03-17 09:19, Swati Sharma wrote:
>> i915 implements immutable zpos property whereas the existing test
>> case is written to validate mutable zpos.
>>
>> Added a new sub-test to validate immutable zpos. Test validates
>> the reported zpos property of plane by making sure only higher
>> zpos plane covers the lower zpos one (lower plane covers full screen,
>> upper plane covers half screen).
>>
>> Only two planes at a time are tested in increasing fashion to avoid
>> combinatorial explosion. By transitive property,
>> if (p1, z1) < (p2, z2) and (p2, z2) < (p3, z3) then (p1, z1) < (p3, z3)
>>
>> where p and z denotes planes and zpos
>>
>> v2: -Removed intel only checks [Martin]
>>      -Used XRGB8888 pixel format as used in other IGTs
>>      -Added documentation [Martin]
>>      -Removed skip, instead continue if plane doesn't support zpos [Martin]
>>      -Sorted planes in increasing order of zpos [Martin]
>> v3: -Fix description [Martin]
>>      -Avoid sorting [Ankit]
>> v4: -Change in commit message [Ankit]
>>      -Few minor changes [Ankit]
>>
>> Issue: https://gitlab.freedesktop.org/drm/intel/issues/404
>> Signed-off-by: Swati Sharma <swati2.sharma@intel.com>
>> Reviewed-by: Martin Peres <martin.peres@linux.intel.com>
>> Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>
>> ---
>>   tests/kms_atomic.c | 160 ++++++++++++++++++++++++++++++++++++++++++---
>>   1 file changed, 150 insertions(+), 10 deletions(-)
>>
>> diff --git a/tests/kms_atomic.c b/tests/kms_atomic.c
>> index 8462d128..4cb34d6d 100644
>> --- a/tests/kms_atomic.c
>> +++ b/tests/kms_atomic.c
>> @@ -121,7 +121,7 @@ static void plane_check_current_state(igt_plane_t *plane, const uint64_t *values
>>   }
>>   
>>   static void plane_commit(igt_plane_t *plane, enum igt_commit_style s,
>> -                                enum kms_atomic_check_relax relax)
>> +                         enum kms_atomic_check_relax relax)
>>   {
>>   	igt_display_commit2(plane->pipe->display, s);
>>   	plane_check_current_state(plane, plane->values, relax);
>> @@ -277,9 +277,9 @@ static uint32_t plane_get_igt_format(igt_plane_t *plane)
>>   }
>>   
>>   static void
>> -plane_primary_overlay_zpos(igt_pipe_t *pipe, igt_output_t *output,
>> -			   igt_plane_t *primary, igt_plane_t *overlay,
>> -			   uint32_t format_primary, uint32_t format_overlay)
>> +plane_primary_overlay_mutable_zpos(igt_pipe_t *pipe, igt_output_t *output,
>> +			           igt_plane_t *primary, igt_plane_t *overlay,
>> +			           uint32_t format_primary, uint32_t format_overlay)
>>   {
>>   	struct igt_fb fb_primary, fb_overlay;
>>   	drmModeModeInfo *mode = igt_output_get_mode(output);
>> @@ -320,7 +320,7 @@ plane_primary_overlay_zpos(igt_pipe_t *pipe, igt_output_t *output,
>>   	igt_plane_set_prop_value(overlay, IGT_PLANE_ZPOS, 1);
>>   
>>   	igt_info("Committing with overlay on top, it has a hole "\
>> -		  "through which the primary should be seen\n");
>> +		 "through which the primary should be seen\n");
>>   	plane_commit(primary, COMMIT_ATOMIC, ATOMIC_RELAX_NONE);
>>   
>>   	igt_assert_eq_u64(igt_plane_get_prop(primary, IGT_PLANE_ZPOS), 0);
>> @@ -346,7 +346,7 @@ plane_primary_overlay_zpos(igt_pipe_t *pipe, igt_output_t *output,
>>   	igt_put_cairo_ctx(pipe->display->drm_fd, &fb_primary, cr);
>>   
>>   	igt_info("Committing with a hole in the primary through "\
>> -		  "which the underlay should be seen\n");
>> +		 "which the underlay should be seen\n");
>>   	plane_commit(primary, COMMIT_ATOMIC, ATOMIC_RELAX_NONE);
>>   
>>   	/* reset it back to initial state */
>> @@ -358,6 +358,136 @@ plane_primary_overlay_zpos(igt_pipe_t *pipe, igt_output_t *output,
>>   	igt_assert_eq_u64(igt_plane_get_prop(overlay, IGT_PLANE_ZPOS), 1);
>>   }
>>   
>> +static void
>> +plane_immutable_zpos(igt_display_t *display, igt_pipe_t *pipe,
>> +		     igt_output_t *output)
>> +{
>> +	cairo_t *cr;
>> +	struct igt_fb fb_ref;
>> +	igt_plane_t *primary;
>> +	drmModeModeInfo *mode;
>> +	igt_pipe_crc_t *pipe_crc;
>> +	igt_crc_t ref_crc, new_crc;
>> +	int n_planes = pipe->n_planes;
>> +	igt_plane_t *plane_ptr[n_planes];
>> +	uint32_t w_lower, h_lower, w_upper, h_upper;
>> +
>> +	igt_require(n_planes >= 2);
>> +
>> +	mode = igt_output_get_mode(output);
>> +	primary = igt_pipe_get_plane_type(pipe, DRM_PLANE_TYPE_PRIMARY);
>> +
>> +	/* for lower plane */
>> +	w_lower = mode->hdisplay;
>> +	h_lower = mode->vdisplay;
>> +
>> +	/* for upper plane */
>> +	w_upper = mode->hdisplay / 2;
>> +	h_upper = mode->vdisplay / 2;
>> +
>> +	igt_create_color_fb(display->drm_fd,
>> +			    w_lower, h_lower,
>> +			    DRM_FORMAT_XRGB8888,
>> +			    I915_TILING_NONE,
>> +			    0.0, 0.0, 0.0, &fb_ref);
>> +
>> +	/* create reference image */
>> +	cr = igt_get_cairo_ctx(display->drm_fd, &fb_ref);
>> +	igt_assert(cairo_status(cr) == 0);
>> +	igt_paint_color(cr, 0, 0, w_lower, h_lower, 0.0, 0.0, 1.0);
>> +	igt_paint_color(cr, w_upper / 2, h_upper / 2, w_upper, h_upper, 1.0, 1.0, 0.0);
>> +	igt_put_cairo_ctx(display->drm_fd, &fb_ref, cr);
>> +	igt_plane_set_fb(primary, &fb_ref);
>> +	igt_display_commit2(display, COMMIT_ATOMIC);
>> +
>> +	/* create the pipe_crc object for this pipe */
>> +	pipe_crc = igt_pipe_crc_new(pipe->display->drm_fd, pipe->pipe,
>> +				    INTEL_PIPE_CRC_SOURCE_AUTO);
>> +
>> +	/* get reference crc */
>> +	igt_pipe_crc_start(pipe_crc);
>> +	igt_pipe_crc_get_current(display->drm_fd, pipe_crc, &ref_crc);
>> +
>> +	igt_plane_set_fb(primary, NULL);
>> +
>> +	for (int k = 0; k < n_planes; k++) {
>> +		int zpos;
>> +		igt_plane_t *temp;
>> +
>> +		temp = &display->pipes[pipe->pipe].planes[k];
>> +
>> +		if (!igt_plane_has_prop(temp, IGT_PLANE_ZPOS))
>> +			continue;
>> +
>> +		assert(zpos < n_planes);
> 
> I'll assume you get this fixed, as suggested by Petri (unspecified zpos
> and igt_assert_lt).
> 
Done in v5.
>> +
>> +		zpos = igt_plane_get_prop(temp, IGT_PLANE_ZPOS);
>> +		plane_ptr[zpos] = temp;
>> +	}
>> +
>> +	/*
>> +	 * checking only pairs of plane in increasing fashion
>> +	 * to avoid combinatorial explosion
>> +	 */
>> +	for (int i = 0; i < n_planes - 1; i++) {
>> +		int fb_id_lower, fb_id_upper;
>> +		struct igt_fb fb_lower, fb_upper;
>> +		igt_plane_t *plane_lower, *plane_upper;
>> +
>> +		if (plane_ptr[i] != NULL)
>> +			plane_lower = plane_ptr[i];
>> +		else
>> +			continue;
>> +
>> +		while (i  < (n_planes - 1)) {
>> +			if (plane_ptr[i + 1] != NULL) {
>> +				plane_upper = plane_ptr[i + 1];
>> +				break;
>> +			} else {
>> +				i++;
>> +				continue;
>> +			}
>> +		}
>> +
>> +		if (i == (n_planes - 1))
>> +			break;
> 
> This should be impossible to reach given that the for loop is i <
> n_planes - 1
> 
> You can drop this.

Done in v5.
>> +
>> +		if ((plane_lower->type == DRM_PLANE_TYPE_CURSOR) ||
>> +				(plane_upper->type == DRM_PLANE_TYPE_CURSOR))
>> +			continue;
>> +
>> +		fb_id_lower = igt_create_color_fb(display->drm_fd,
>> +						  w_lower, h_lower,
>> +						  DRM_FORMAT_XRGB8888,
>> +						  I915_TILING_NONE,
>> +						  0.0, 0.0, 1.0, &fb_lower);
>> +		igt_assert(fb_id_lower);
>> +
>> +		fb_id_upper = igt_create_color_fb(display->drm_fd,
>> +						  w_upper, h_upper,
>> +						  DRM_FORMAT_XRGB8888,
>> +						  I915_TILING_NONE,
>> +						  1.0, 1.0, 0.0, &fb_upper);
>> +		igt_assert(fb_id_upper);
>> +
>> +		igt_plane_set_position(plane_lower, 0, 0);
>> +		igt_plane_set_fb(plane_lower, &fb_lower);
>> +
>> +		igt_plane_set_position(plane_upper, w_upper / 2, h_upper / 2);
>> +		igt_plane_set_fb(plane_upper, &fb_upper);
>> +
>> +		igt_info("Committing with the plane[%d] underneath "\
>> +			 "plane[%d]\n", i, (i + 1));
>> +		igt_display_commit2(display, COMMIT_ATOMIC);
>> +		igt_pipe_crc_get_current(pipe->display->drm_fd, pipe_crc, &new_crc);
>> +
>> +		igt_assert_crc_equal(&ref_crc, &new_crc);
>> +
>> +		igt_plane_set_fb(plane_lower, NULL);
>> +		igt_plane_set_fb(plane_upper, NULL);
>> +	}
>> +}
>> +
>>   static void plane_overlay(igt_pipe_t *pipe, igt_output_t *output, igt_plane_t *plane)
>>   {
>>   	drmModeModeInfo *mode = igt_output_get_mode(output);
>> @@ -987,14 +1117,16 @@ igt_main
>>   		plane_primary(pipe_obj, primary, &fb);
>>   	}
>>   
>> -	igt_subtest("plane_primary_overlay_zpos") {
>> +	igt_describe("Verify that the overlay plane can cover the primary one (and "\
>> +		     "vice versa) by changing their zpos property.");
>> +	igt_subtest("plane_primary_overlay_mutable_zpos") {
>>   		uint32_t format_primary = DRM_FORMAT_ARGB8888;
>>   		uint32_t format_overlay = DRM_FORMAT_ARGB1555;
>>   
>>   		igt_plane_t *overlay =
>>   			igt_pipe_get_plane_type(pipe_obj, DRM_PLANE_TYPE_OVERLAY);
>> -
>>   		igt_require(overlay);
>> +
>>   		igt_require(igt_plane_has_prop(primary, IGT_PLANE_ZPOS));
>>   		igt_require(igt_plane_has_prop(overlay, IGT_PLANE_ZPOS));
>>   
>> @@ -1002,8 +1134,15 @@ igt_main
>>   		igt_require(igt_plane_has_format_mod(overlay, format_overlay, 0x0));
>>   
>>   		igt_output_set_pipe(output, pipe);
>> -		plane_primary_overlay_zpos(pipe_obj, output, primary, overlay,
>> -					   format_primary, format_overlay);
>> +		plane_primary_overlay_mutable_zpos(pipe_obj, output, primary, overlay,
>> +					           format_primary, format_overlay);
>> +	}
>> +
>> +	igt_describe("Verify the reported zpos property of planes by making sure "\
>> +		     "only higher zpos planes cover the lower zpos ones.");
> 
> With what you have right now, you are checking planes only 2 by 2, as
> opposed to keeping the planes under the "main" plane active, but with a
> different color, in order to check for non-linearity between planes'
> reported zpos. This would require really broken HW, but this is what the
> test is about :s
> 
> To save memory bandwidth, we could have a 2x2 red fb that would be used
> by all planes ;)
> 
> I am however OK with merging this now, as it is already a pretty good
> test! With the changes suggested by Petri, this patch is:
> 
> Reviewed-by: Martin Peres <martin.peres@linux.intel.com>

Thanks!
> 
>> +	igt_subtest("plane_immutable_zpos") {
>> +		igt_output_set_pipe(output, pipe);
>> +		plane_immutable_zpos(&display, pipe_obj, output);
>>   	}
>>   
>>   	igt_subtest("test_only") {
>> @@ -1011,6 +1150,7 @@ igt_main
>>   
>>   		test_only(pipe_obj, primary, output);
>>   	}
>> +
>>   	igt_subtest("plane_cursor_legacy") {
>>   		igt_plane_t *cursor =
>>   			igt_pipe_get_plane_type(pipe_obj, DRM_PLANE_TYPE_CURSOR);
>>
> 

-- 
~Swati Sharma
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