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drm/selftests: Add drm_rect selftests

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Add selftests for drm_rect. A few basic ones for clipped and unclipped
cases, and a few special ones for specific bugs we had in the code.

I'm too lazy to think of more corner cases to check at this time.
Maybe later.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191122175623.13565-5-ville.syrjala@linux.intel.com
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Benjamin Gaignard <benjamin.gaignard@st.com>
This commit is contained in:
Ville Syrjälä 2019-11-22 19:56:23 +02:00
parent 2020af2dbf
commit 30218eb77d
5 changed files with 238 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/gpu/drm/selftests/Makefile
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@ -1,6 +1,7 @@
# SPDX-License-Identifier: GPL-2.0-only
test-drm_modeset-y := test-drm_modeset_common.o test-drm_plane_helper.o \
test-drm_format.o test-drm_framebuffer.o \
test-drm_damage_helper.o test-drm_dp_mst_helper.o
test-drm_damage_helper.o test-drm_dp_mst_helper.o \
test-drm_rect.o
obj-$(CONFIG_DRM_DEBUG_SELFTEST) += test-drm_mm.o test-drm_modeset.o test-drm_cmdline_parser.o

4
drivers/gpu/drm/selftests/drm_modeset_selftests.h
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@ -6,6 +6,10 @@
*
* Tests are executed in order by igt/drm_selftests_helper
*/
selftest(drm_rect_clip_scaled_div_by_zero, igt_drm_rect_clip_scaled_div_by_zero)
selftest(drm_rect_clip_scaled_not_clipped, igt_drm_rect_clip_scaled_not_clipped)
selftest(drm_rect_clip_scaled_clipped, igt_drm_rect_clip_scaled_clipped)
selftest(drm_rect_clip_scaled_signed_vs_unsigned, igt_drm_rect_clip_scaled_signed_vs_unsigned)
selftest(check_plane_state, igt_check_plane_state)
selftest(check_drm_format_block_width, igt_check_drm_format_block_width)
selftest(check_drm_format_block_height, igt_check_drm_format_block_height)

7
drivers/gpu/drm/selftests/test-drm_modeset_common.h
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@ -3,6 +3,9 @@
#ifndef __TEST_DRM_MODESET_COMMON_H__
#define __TEST_DRM_MODESET_COMMON_H__
#include <linux/errno.h>
#include <linux/printk.h>
#define FAIL(test, msg, ...) \
do { \
if (test) { \
@ -13,6 +16,10 @@
#define FAIL_ON(x) FAIL((x), "%s", "FAIL_ON(" __stringify(x) ")\n")
int igt_drm_rect_clip_scaled_div_by_zero(void *ignored);
int igt_drm_rect_clip_scaled_not_clipped(void *ignored);
int igt_drm_rect_clip_scaled_clipped(void *ignored);
int igt_drm_rect_clip_scaled_signed_vs_unsigned(void *ignored);
int igt_check_plane_state(void *ignored);
int igt_check_drm_format_block_width(void *ignored);
int igt_check_drm_format_block_height(void *ignored);

223
drivers/gpu/drm/selftests/test-drm_rect.c Normal file
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@ -0,0 +1,223 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Test cases for the drm_rect functions
*/
#define pr_fmt(fmt) "drm_rect: " fmt
#include <linux/limits.h>
#include <drm/drm_rect.h>
#include "test-drm_modeset_common.h"
int igt_drm_rect_clip_scaled_div_by_zero(void *ignored)
{
struct drm_rect src, dst, clip;
bool visible;
/*
* Make sure we don't divide by zero when dst
* width/height is zero and dst and clip do not intersect.
*/
drm_rect_init(&src, 0, 0, 0, 0);
drm_rect_init(&dst, 0, 0, 0, 0);
drm_rect_init(&clip, 1, 1, 1, 1);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(visible, "Destination not be visible\n");
FAIL(drm_rect_visible(&src), "Source should not be visible\n");
drm_rect_init(&src, 0, 0, 0, 0);
drm_rect_init(&dst, 3, 3, 0, 0);
drm_rect_init(&clip, 1, 1, 1, 1);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(visible, "Destination not be visible\n");
FAIL(drm_rect_visible(&src), "Source should not be visible\n");
return 0;
}
int igt_drm_rect_clip_scaled_not_clipped(void *ignored)
{
struct drm_rect src, dst, clip;
bool visible;
/* 1:1 scaling */
drm_rect_init(&src, 0, 0, 1 << 16, 1 << 16);
drm_rect_init(&dst, 0, 0, 1, 1);
drm_rect_init(&clip, 0, 0, 1, 1);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(src.x1 != 0 || src.x2 != 1 << 16 ||
src.y1 != 0 || src.y2 != 1 << 16,
"Source badly clipped\n");
FAIL(dst.x1 != 0 || dst.x2 != 1 ||
dst.y1 != 0 || dst.y2 != 1,
"Destination badly clipped\n");
FAIL(!visible, "Destination should be visible\n");
FAIL(!drm_rect_visible(&src), "Source should be visible\n");
/* 2:1 scaling */
drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
drm_rect_init(&dst, 0, 0, 1, 1);
drm_rect_init(&clip, 0, 0, 1, 1);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(src.x1 != 0 || src.x2 != 2 << 16 ||
src.y1 != 0 || src.y2 != 2 << 16,
"Source badly clipped\n");
FAIL(dst.x1 != 0 || dst.x2 != 1 ||
dst.y1 != 0 || dst.y2 != 1,
"Destination badly clipped\n");
FAIL(!visible, "Destination should be visible\n");
FAIL(!drm_rect_visible(&src), "Source should be visible\n");
/* 1:2 scaling */
drm_rect_init(&src, 0, 0, 1 << 16, 1 << 16);
drm_rect_init(&dst, 0, 0, 2, 2);
drm_rect_init(&clip, 0, 0, 2, 2);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(src.x1 != 0 || src.x2 != 1 << 16 ||
src.y1 != 0 || src.y2 != 1 << 16,
"Source badly clipped\n");
FAIL(dst.x1 != 0 || dst.x2 != 2 ||
dst.y1 != 0 || dst.y2 != 2,
"Destination badly clipped\n");
FAIL(!visible, "Destination should be visible\n");
FAIL(!drm_rect_visible(&src), "Source should be visible\n");
return 0;
}
int igt_drm_rect_clip_scaled_clipped(void *ignored)
{
struct drm_rect src, dst, clip;
bool visible;
/* 1:1 scaling top/left clip */
drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
drm_rect_init(&dst, 0, 0, 2, 2);
drm_rect_init(&clip, 0, 0, 1, 1);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(src.x1 != 0 || src.x2 != 1 << 16 ||
src.y1 != 0 || src.y2 != 1 << 16,
"Source badly clipped\n");
FAIL(dst.x1 != 0 || dst.x2 != 1 ||
dst.y1 != 0 || dst.y2 != 1,
"Destination badly clipped\n");
FAIL(!visible, "Destination should be visible\n");
FAIL(!drm_rect_visible(&src), "Source should be visible\n");
/* 1:1 scaling bottom/right clip */
drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
drm_rect_init(&dst, 0, 0, 2, 2);
drm_rect_init(&clip, 1, 1, 1, 1);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(src.x1 != 1 << 16 || src.x2 != 2 << 16 ||
src.y1 != 1 << 16 || src.y2 != 2 << 16,
"Source badly clipped\n");
FAIL(dst.x1 != 1 || dst.x2 != 2 ||
dst.y1 != 1 || dst.y2 != 2,
"Destination badly clipped\n");
FAIL(!visible, "Destination should be visible\n");
FAIL(!drm_rect_visible(&src), "Source should be visible\n");
/* 2:1 scaling top/left clip */
drm_rect_init(&src, 0, 0, 4 << 16, 4 << 16);
drm_rect_init(&dst, 0, 0, 2, 2);
drm_rect_init(&clip, 0, 0, 1, 1);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(src.x1 != 0 || src.x2 != 2 << 16 ||
src.y1 != 0 || src.y2 != 2 << 16,
"Source badly clipped\n");
FAIL(dst.x1 != 0 || dst.x2 != 1 ||
dst.y1 != 0 || dst.y2 != 1,
"Destination badly clipped\n");
FAIL(!visible, "Destination should be visible\n");
FAIL(!drm_rect_visible(&src), "Source should be visible\n");
/* 2:1 scaling bottom/right clip */
drm_rect_init(&src, 0, 0, 4 << 16, 4 << 16);
drm_rect_init(&dst, 0, 0, 2, 2);
drm_rect_init(&clip, 1, 1, 1, 1);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(src.x1 != 2 << 16 || src.x2 != 4 << 16 ||
src.y1 != 2 << 16 || src.y2 != 4 << 16,
"Source badly clipped\n");
FAIL(dst.x1 != 1 || dst.x2 != 2 ||
dst.y1 != 1 || dst.y2 != 2,
"Destination badly clipped\n");
FAIL(!visible, "Destination should be visible\n");
FAIL(!drm_rect_visible(&src), "Source should be visible\n");
/* 1:2 scaling top/left clip */
drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
drm_rect_init(&dst, 0, 0, 4, 4);
drm_rect_init(&clip, 0, 0, 2, 2);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(src.x1 != 0 || src.x2 != 1 << 16 ||
src.y1 != 0 || src.y2 != 1 << 16,
"Source badly clipped\n");
FAIL(dst.x1 != 0 || dst.x2 != 2 ||
dst.y1 != 0 || dst.y2 != 2,
"Destination badly clipped\n");
FAIL(!visible, "Destination should be visible\n");
FAIL(!drm_rect_visible(&src), "Source should be visible\n");
/* 1:2 scaling bottom/right clip */
drm_rect_init(&src, 0, 0, 2 << 16, 2 << 16);
drm_rect_init(&dst, 0, 0, 4, 4);
drm_rect_init(&clip, 2, 2, 2, 2);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(src.x1 != 1 << 16 || src.x2 != 2 << 16 ||
src.y1 != 1 << 16 || src.y2 != 2 << 16,
"Source badly clipped\n");
FAIL(dst.x1 != 2 || dst.x2 != 4 ||
dst.y1 != 2 || dst.y2 != 4,
"Destination badly clipped\n");
FAIL(!visible, "Destination should be visible\n");
FAIL(!drm_rect_visible(&src), "Source should be visible\n");
return 0;
}
int igt_drm_rect_clip_scaled_signed_vs_unsigned(void *ignored)
{
struct drm_rect src, dst, clip;
bool visible;
/*
* 'clip.x2 - dst.x1 >= dst width' could result a negative
* src rectangle width which is no longer expected by the
* code as it's using unsigned types. This could lead to
* the clipped source rectangle appering visible when it
* should have been fully clipped. Make sure both rectangles
* end up invisible.
*/
drm_rect_init(&src, 0, 0, INT_MAX, INT_MAX);
drm_rect_init(&dst, 0, 0, 2, 2);
drm_rect_init(&clip, 3, 3, 1, 1);
visible = drm_rect_clip_scaled(&src, &dst, &clip);
FAIL(visible, "Destination should not be visible\n");
FAIL(drm_rect_visible(&src), "Source should not be visible\n");
return 0;
}

2
include/drm/drm_rect.h
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@ -24,6 +24,8 @@
#ifndef DRM_RECT_H
#define DRM_RECT_H
#include <linux/types.h>
/**
* DOC: rect utils
*