Re: [PATCH i-g-t v4 4/6] tests/kms_ccs: Test case where the CCS buffer was not provided

["Ville Syrjälä" <ville.syrjala@linux.intel.com>]

On Tue, Oct 03, 2017 at 09:35:33AM -0700, Ben Widawsky wrote:
> On 17-09-27 15:34:17, Gabriel Krisman Bertazi wrote:
> >Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.co.uk>
> >---
> > tests/kms_ccs.c | 37 +++++++++++++++++++++++++++----------
> > 1 file changed, 27 insertions(+), 10 deletions(-)
> >
> >diff --git a/tests/kms_ccs.c b/tests/kms_ccs.c
> >index 73025a1e019f..35dfcca6be14 100644
> >--- a/tests/kms_ccs.c
> >+++ b/tests/kms_ccs.c
> >@@ -33,8 +33,12 @@ enum test_flags {
> > 	TEST_ROTATE_180			= 1 << 2,
> > 	TEST_BAD_PIXEL_FORMAT		= 1 << 3,
> > 	TEST_BAD_ROTATION_90		= 1 << 4,
> >+	TEST_NO_AUX_BUFFER		= 1 << 5,
> > };
> >
> >+#define TEST_FAIL_ON_ADDFB2 \
> >+	(TEST_BAD_PIXEL_FORMAT | TEST_NO_AUX_BUFFER)
> >+
> 
> Adding the define confuses things more than it helps IMO.
> 
> > enum test_fb_flags {
> > 	FB_COMPRESSED			= 1 << 0,
> > 	FB_HAS_PLANE			= 1 << 1,
> >@@ -315,22 +319,29 @@ static void generate_fb(data_t *data, struct igt_fb *fb,
> > 		 */
> > 		int ccs_width = ALIGN(width * 4, 32) / 32;
> > 		int ccs_height = ALIGN(height, 16) / 16;
> >-		f.pitches[1] = ALIGN(ccs_width * 1, 128);
> >-		f.modifier[1] = modifier;
> 
> I think the case you're trying to test should have the modifier set for plane1,
> just no handle, size or whatever. If you don't do this, I'm not sure what you're
> actually testing.

Hmm. I suppose we migth end up testing bad stride here. I can't
recall exactly in which order the kernel checks these. So just
setting 'handle[1] = 0' might be what we want to test here.
And then we may want a 'pitches[1] = 0' test as well in the bad stride
tests.

> 
> >-		f.offsets[1] = size[0];
> >-		size[1] = f.pitches[1] * ALIGN(ccs_height, 32);
> >+		int ccs_pitches = ALIGN(ccs_width * 1, 128);
> >+		int ccs_offsets = size[0];
> >+
> >+		size[1] = ccs_pitches * ALIGN(ccs_height, 32);
> >
> > 		f.handles[0] = gem_create(data->drm_fd, size[0] + size[1]);
> >-		f.handles[1] = f.handles[0];
> >-		render_ccs(data, f.handles[1], f.offsets[1], size[1],
> >-			   height, f.pitches[1]);
> >+
> >+		if (!(data->flags & TEST_NO_AUX_BUFFER)) {
> >+			f.modifier[1] = modifier;
> >+			f.handles[1] = f.handles[0];
> >+			f.pitches[1] = ccs_pitches;
> >+			f.offsets[1] = ccs_offsets;
> >+
> >+			render_ccs(data, f.handles[1], f.offsets[1], size[1],
> >+				   height, f.pitches[1]);
> >+		}
> > 	} else
> > 		f.handles[0] = gem_create(data->drm_fd, size[0]);
> >
> > 	render_fb(data, f.handles[0], size[0], fb_flags, height, f.pitches[0]);
> >
> > 	ret = drmIoctl(data->drm_fd, LOCAL_DRM_IOCTL_MODE_ADDFB2, &f);
> >-	if (data->flags & TEST_BAD_PIXEL_FORMAT) {
> >+	if (data->flags & TEST_FAIL_ON_ADDFB2) {
> > 		igt_assert_eq(ret, -1);
> > 		igt_assert_eq(errno, EINVAL);
> > 		return;
> >@@ -379,7 +390,7 @@ static void try_config(data_t *data, enum test_fb_flags fb_flags)
> > 			    drm_mode->vdisplay, fb_flags);
> > 	}
> >
> >-	if (data->flags & TEST_BAD_PIXEL_FORMAT)
> >+	if (data->flags & TEST_FAIL_ON_ADDFB2)
> > 		return;
> >
> > 	igt_plane_set_position(primary, 0, 0);
> >@@ -446,7 +457,8 @@ static void test_output(data_t *data)
> > 	}
> >
> > 	if (data->flags & TEST_BAD_PIXEL_FORMAT ||
> >-	    data->flags & TEST_BAD_ROTATION_90) {
> >+	    data->flags & TEST_BAD_ROTATION_90 ||
> >+	    data->flags & TEST_NO_AUX_BUFFER) {
> > 		try_config(data, fb_flags | FB_COMPRESSED);
> > 	}
> >
> >@@ -515,6 +527,11 @@ igt_main
> > 		}
> >
> > 		data.plane = NULL;
> >+
> >+		data.flags = TEST_NO_AUX_BUFFER;
> >+		igt_subtest_f("pipe-%s-missing-ccs-buffer", pipe_name)
> >+			test_output(&data);
> >+
> > 	}
> >
> > 	igt_fixture
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-- 
Ville Syrjälä
Intel OTC
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