Most gen7 and gen8 platforms can't do plane scaling, so we need to
ensure the test doesn't try to do plane scaling on those platforms. The
legacy non-atomic subtest bakes these platform characteristics into the
test itself since legacy modesetting interfaces don't provide a way to
probe platform capabilities like atomic does.
Maarten previously tried to address this with commit 24c5e0778
("tests/kms_panel_fitting: Do not use scaling on gen7 and gen8, v2."),
but he augmented an existing test for gen9+pipeC which comes too late
since we've already turned on the plane at that point. We can fix this
by moving the test up higher; not only before we enable panel fitting,
but also before we turn on the sprite.
Note that this still isn't a great subtest since it's very
Intel-specific, despite being part of a generic KMS test that's intended
for all vendors. A future enhancement might be to try to probe the
platform capabilities with a TEST_ONLY atomic operation before using the
legacy interfaces to actually program them.
While touching the code, I also added some slight restructuring, added
additional comments, and broke up >80 char lines to add clarity to
what's going on.
Cc: Maarten Lankhorst <[email protected]>
Signed-off-by: Matt Roper <[email protected]>
---
tests/kms_panel_fitting.c | 24 +++++++++++++++++++-----
1 file changed, 19 insertions(+), 5 deletions(-)
diff --git a/tests/kms_panel_fitting.c b/tests/kms_panel_fitting.c
index 491e429f..a942294b 100644
--- a/tests/kms_panel_fitting.c
+++ b/tests/kms_panel_fitting.c
@@ -131,11 +131,10 @@ static void test_panel_fitting(data_t *d)
igt_fb_set_position(&d->fb2, d->plane2, 100, 100);
igt_fb_set_size(&d->fb2, d->plane2, d->fb2.width-200,
d->fb2.height-200);
igt_plane_set_position(d->plane2, 100, 100);
- igt_plane_set_size(d->plane2, mode->hdisplay-200,
mode->vdisplay-200);
- igt_display_commit2(display, COMMIT_UNIVERSAL);
/*
- * most of gen7 and all of gen8 doesn't support scaling at all.
+ * Most of gen7 and all of gen8 doesn't support plane scaling
+ * at all.
*
* gen9 pipe C has only 1 scaler shared with the crtc, which
* means pipe scaling can't work simultaneously with panel
@@ -144,9 +143,24 @@ static void test_panel_fitting(data_t *d)
* Since this is the legacy path, userspace has to know about
* the HW limitations, whereas atomic can ask.
*/
- if (IS_GEN8(devid) || (IS_GEN7(devid) && !IS_IVYBRIDGE(devid))
||
+ if (IS_GEN8(devid) ||
+ (IS_GEN7(devid) && !IS_IVYBRIDGE(devid)) ||
(IS_GEN9(devid) && pipe == PIPE_C))
- igt_plane_set_size(d->plane2, d->fb2.width-200,
d->fb2.height-200);
+ /* same as visible area of fb => no scaling */
+ igt_plane_set_size(d->plane2,
+ d->fb2.width-200,
+ d->fb2.height-200);
+ else
+ /*
+ * different than visible area of fb => plane scaling
+ * active
+ */
+ igt_plane_set_size(d->plane2,
+ mode->hdisplay-200,
+ mode->vdisplay-200);
+
+ /* Plane scaling active (if possible), pfit off */
+ igt_display_commit2(display, COMMIT_UNIVERSAL);
/* enable panel fitting along with sprite scaling */
mode->hdisplay = 1024;
--
2.20.1
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