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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Test cases for the drm_framebuffer functions
4 *
5 * Copyright (c) 2022 Maíra Canal <[email protected]>
6 */
7
8#include <kunit/device.h>
9#include <kunit/test.h>
10
11#include <drm/drm_device.h>
12#include <drm/drm_drv.h>
13#include <drm/drm_mode.h>
14#include <drm/drm_framebuffer.h>
15#include <drm/drm_fourcc.h>
16#include <drm/drm_kunit_helpers.h>
17#include <drm/drm_print.h>
18
19#include "../drm_crtc_internal.h"
20
21#define MIN_WIDTH 4
22#define MAX_WIDTH 4096
23#define MIN_HEIGHT 4
24#define MAX_HEIGHT 4096
25
26#define DRM_MODE_FB_INVALID BIT(2)
27
28struct drm_framebuffer_test {
29 int buffer_created;
30 struct drm_mode_fb_cmd2 cmd;
31 const char *name;
32};
33
34static const struct drm_framebuffer_test drm_framebuffer_create_cases[] = {
35{ .buffer_created = 1, .name = "ABGR8888 normal sizes",
36 .cmd = { .width = 600, .height = 600, .pixel_format = DRM_FORMAT_ABGR8888,
37 .handles = { 1, 0, 0 }, .pitches = { 4 * 600, 0, 0 },
38 }
39},
40{ .buffer_created = 1, .name = "ABGR8888 max sizes",
41 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
42 .handles = { 1, 0, 0 }, .pitches = { 4 * MAX_WIDTH, 0, 0 },
43 }
44},
45{ .buffer_created = 1, .name = "ABGR8888 pitch greater than min required",
46 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
47 .handles = { 1, 0, 0 }, .pitches = { 4 * MAX_WIDTH + 1, 0, 0 },
48 }
49},
50{ .buffer_created = 0, .name = "ABGR8888 pitch less than min required",
51 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
52 .handles = { 1, 0, 0 }, .pitches = { 4 * MAX_WIDTH - 1, 0, 0 },
53 }
54},
55{ .buffer_created = 0, .name = "ABGR8888 Invalid width",
56 .cmd = { .width = MAX_WIDTH + 1, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
57 .handles = { 1, 0, 0 }, .pitches = { 4 * (MAX_WIDTH + 1), 0, 0 },
58 }
59},
60{ .buffer_created = 0, .name = "ABGR8888 Invalid buffer handle",
61 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
62 .handles = { 0, 0, 0 }, .pitches = { 4 * MAX_WIDTH, 0, 0 },
63 }
64},
65{ .buffer_created = 0, .name = "No pixel format",
66 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = 0,
67 .handles = { 1, 0, 0 }, .pitches = { 4 * MAX_WIDTH, 0, 0 },
68 }
69},
70{ .buffer_created = 0, .name = "ABGR8888 Width 0",
71 .cmd = { .width = 0, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
72 .handles = { 1, 0, 0 }, .pitches = { 4 * MAX_WIDTH, 0, 0 },
73 }
74},
75{ .buffer_created = 0, .name = "ABGR8888 Height 0",
76 .cmd = { .width = MAX_WIDTH, .height = 0, .pixel_format = DRM_FORMAT_ABGR8888,
77 .handles = { 1, 0, 0 }, .pitches = { 4 * MAX_WIDTH, 0, 0 },
78 }
79},
80{ .buffer_created = 0, .name = "ABGR8888 Out of bound height * pitch combination",
81 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
82 .handles = { 1, 0, 0 }, .offsets = { UINT_MAX - 1, 0, 0 },
83 .pitches = { 4 * MAX_WIDTH, 0, 0 },
84 }
85},
86{ .buffer_created = 1, .name = "ABGR8888 Large buffer offset",
87 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
88 .handles = { 1, 0, 0 }, .offsets = { UINT_MAX / 2, 0, 0 },
89 .pitches = { 4 * MAX_WIDTH, 0, 0 },
90 }
91},
92
93/*
94 * All entries in members that represents per-plane values (@modifier, @handles,
95 * @pitches and @offsets) must be zero when unused.
96 */
97{ .buffer_created = 0, .name = "ABGR8888 Buffer offset for inexistent plane",
98 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
99 .handles = { 1, 0, 0 }, .offsets = { UINT_MAX / 2, UINT_MAX / 2, 0 },
100 .pitches = { 4 * MAX_WIDTH, 0, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
101 }
102},
103
104{ .buffer_created = 0, .name = "ABGR8888 Invalid flag",
105 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
106 .handles = { 1, 0, 0 }, .offsets = { UINT_MAX / 2, 0, 0 },
107 .pitches = { 4 * MAX_WIDTH, 0, 0 }, .flags = DRM_MODE_FB_INVALID,
108 }
109},
110{ .buffer_created = 1, .name = "ABGR8888 Set DRM_MODE_FB_MODIFIERS without modifiers",
111 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
112 .handles = { 1, 0, 0 }, .offsets = { UINT_MAX / 2, 0, 0 },
113 .pitches = { 4 * MAX_WIDTH, 0, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
114 }
115},
116{ .buffer_created = 1, .name = "ABGR8888 Valid buffer modifier",
117 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
118 .handles = { 1, 0, 0 }, .offsets = { UINT_MAX / 2, 0, 0 },
119 .pitches = { 4 * MAX_WIDTH, 0, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
120 .modifier = { AFBC_FORMAT_MOD_YTR, 0, 0 },
121 }
122},
123{ .buffer_created = 0,
124 .name = "ABGR8888 Invalid buffer modifier(DRM_FORMAT_MOD_SAMSUNG_64_32_TILE)",
125 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
126 .handles = { 1, 0, 0 }, .offsets = { UINT_MAX / 2, 0, 0 },
127 .pitches = { 4 * MAX_WIDTH, 0, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
128 .modifier = { DRM_FORMAT_MOD_SAMSUNG_64_32_TILE, 0, 0 },
129 }
130},
131{ .buffer_created = 1, .name = "ABGR8888 Extra pitches without DRM_MODE_FB_MODIFIERS",
132 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
133 .handles = { 1, 0, 0 }, .offsets = { UINT_MAX / 2, 0, 0 },
134 .pitches = { 4 * MAX_WIDTH, 4 * MAX_WIDTH, 0 },
135 }
136},
137{ .buffer_created = 0, .name = "ABGR8888 Extra pitches with DRM_MODE_FB_MODIFIERS",
138 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_ABGR8888,
139 .handles = { 1, 0, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
140 .pitches = { 4 * MAX_WIDTH, 4 * MAX_WIDTH, 0 },
141 }
142},
143{ .buffer_created = 1, .name = "NV12 Normal sizes",
144 .cmd = { .width = 600, .height = 600, .pixel_format = DRM_FORMAT_NV12,
145 .handles = { 1, 1, 0 }, .pitches = { 600, 600, 0 },
146 }
147},
148{ .buffer_created = 1, .name = "NV12 Max sizes",
149 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_NV12,
150 .handles = { 1, 1, 0 }, .pitches = { MAX_WIDTH, MAX_WIDTH, 0 },
151 }
152},
153{ .buffer_created = 0, .name = "NV12 Invalid pitch",
154 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_NV12,
155 .handles = { 1, 1, 0 }, .pitches = { MAX_WIDTH, MAX_WIDTH - 1, 0 },
156 }
157},
158{ .buffer_created = 0, .name = "NV12 Invalid modifier/missing DRM_MODE_FB_MODIFIERS flag",
159 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_NV12,
160 .handles = { 1, 1, 0 }, .modifier = { DRM_FORMAT_MOD_SAMSUNG_64_32_TILE, 0, 0 },
161 .pitches = { MAX_WIDTH, MAX_WIDTH, 0 },
162 }
163},
164{ .buffer_created = 0, .name = "NV12 different modifier per-plane",
165 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_NV12,
166 .handles = { 1, 1, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
167 .modifier = { DRM_FORMAT_MOD_SAMSUNG_64_32_TILE, 0, 0 },
168 .pitches = { MAX_WIDTH, MAX_WIDTH, 0 },
169 }
170},
171{ .buffer_created = 1, .name = "NV12 with DRM_FORMAT_MOD_SAMSUNG_64_32_TILE",
172 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_NV12,
173 .handles = { 1, 1, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
174 .modifier = { DRM_FORMAT_MOD_SAMSUNG_64_32_TILE,
175 DRM_FORMAT_MOD_SAMSUNG_64_32_TILE, 0 },
176 .pitches = { MAX_WIDTH, MAX_WIDTH, 0 },
177 }
178},
179{ .buffer_created = 0, .name = "NV12 Valid modifiers without DRM_MODE_FB_MODIFIERS",
180 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_NV12,
181 .handles = { 1, 1, 0 }, .modifier = { DRM_FORMAT_MOD_SAMSUNG_64_32_TILE,
182 DRM_FORMAT_MOD_SAMSUNG_64_32_TILE, 0 },
183 .pitches = { MAX_WIDTH, MAX_WIDTH, 0 },
184 }
185},
186{ .buffer_created = 0, .name = "NV12 Modifier for inexistent plane",
187 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_NV12,
188 .handles = { 1, 1, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
189 .modifier = { DRM_FORMAT_MOD_SAMSUNG_64_32_TILE, DRM_FORMAT_MOD_SAMSUNG_64_32_TILE,
190 DRM_FORMAT_MOD_SAMSUNG_64_32_TILE },
191 .pitches = { MAX_WIDTH, MAX_WIDTH, 0 },
192 }
193},
194{ .buffer_created = 0, .name = "NV12 Handle for inexistent plane",
195 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_NV12,
196 .handles = { 1, 1, 1 }, .flags = DRM_MODE_FB_MODIFIERS,
197 .pitches = { MAX_WIDTH, MAX_WIDTH, 0 },
198 }
199},
200{ .buffer_created = 1, .name = "NV12 Handle for inexistent plane without DRM_MODE_FB_MODIFIERS",
201 .cmd = { .width = 600, .height = 600, .pixel_format = DRM_FORMAT_NV12,
202 .handles = { 1, 1, 1 }, .pitches = { 600, 600, 600 },
203 }
204},
205{ .buffer_created = 1, .name = "YVU420 DRM_MODE_FB_MODIFIERS set without modifier",
206 .cmd = { .width = 600, .height = 600, .pixel_format = DRM_FORMAT_YVU420,
207 .handles = { 1, 1, 1 }, .flags = DRM_MODE_FB_MODIFIERS,
208 .pitches = { 600, 300, 300 },
209 }
210},
211{ .buffer_created = 1, .name = "YVU420 Normal sizes",
212 .cmd = { .width = 600, .height = 600, .pixel_format = DRM_FORMAT_YVU420,
213 .handles = { 1, 1, 1 }, .pitches = { 600, 300, 300 },
214 }
215},
216{ .buffer_created = 1, .name = "YVU420 Max sizes",
217 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
218 .handles = { 1, 1, 1 }, .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2),
219 DIV_ROUND_UP(MAX_WIDTH, 2) },
220 }
221},
222{ .buffer_created = 0, .name = "YVU420 Invalid pitch",
223 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
224 .handles = { 1, 1, 1 }, .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2) - 1,
225 DIV_ROUND_UP(MAX_WIDTH, 2) },
226 }
227},
228{ .buffer_created = 1, .name = "YVU420 Different pitches",
229 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
230 .handles = { 1, 1, 1 }, .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2) + 1,
231 DIV_ROUND_UP(MAX_WIDTH, 2) + 7 },
232 }
233},
234{ .buffer_created = 1, .name = "YVU420 Different buffer offsets/pitches",
235 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
236 .handles = { 1, 1, 1 }, .offsets = { MAX_WIDTH, MAX_WIDTH +
237 MAX_WIDTH * MAX_HEIGHT, MAX_WIDTH + 2 * MAX_WIDTH * MAX_HEIGHT },
238 .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2) + 1,
239 DIV_ROUND_UP(MAX_WIDTH, 2) + 7 },
240 }
241},
242{ .buffer_created = 0,
243 .name = "YVU420 Modifier set just for plane 0, without DRM_MODE_FB_MODIFIERS",
244 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
245 .handles = { 1, 1, 1 }, .modifier = { AFBC_FORMAT_MOD_SPARSE, 0, 0 },
246 .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2), DIV_ROUND_UP(MAX_WIDTH, 2) },
247 }
248},
249{ .buffer_created = 0,
250 .name = "YVU420 Modifier set just for planes 0, 1, without DRM_MODE_FB_MODIFIERS",
251 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
252 .handles = { 1, 1, 1 },
253 .modifier = { AFBC_FORMAT_MOD_SPARSE, AFBC_FORMAT_MOD_SPARSE, 0 },
254 .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2), DIV_ROUND_UP(MAX_WIDTH, 2) },
255 }
256},
257{ .buffer_created = 0,
258 .name = "YVU420 Modifier set just for plane 0, 1, with DRM_MODE_FB_MODIFIERS",
259 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
260 .handles = { 1, 1, 1 }, .flags = DRM_MODE_FB_MODIFIERS,
261 .modifier = { AFBC_FORMAT_MOD_SPARSE, AFBC_FORMAT_MOD_SPARSE, 0 },
262 .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2), DIV_ROUND_UP(MAX_WIDTH, 2) },
263 }
264},
265{ .buffer_created = 1, .name = "YVU420 Valid modifier",
266 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
267 .handles = { 1, 1, 1 }, .flags = DRM_MODE_FB_MODIFIERS,
268 .modifier = { AFBC_FORMAT_MOD_SPARSE, AFBC_FORMAT_MOD_SPARSE,
269 AFBC_FORMAT_MOD_SPARSE },
270 .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2), DIV_ROUND_UP(MAX_WIDTH, 2) },
271 }
272},
273{ .buffer_created = 0, .name = "YVU420 Different modifiers per plane",
274 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
275 .handles = { 1, 1, 1 }, .flags = DRM_MODE_FB_MODIFIERS,
276 .modifier = { AFBC_FORMAT_MOD_SPARSE, AFBC_FORMAT_MOD_SPARSE | AFBC_FORMAT_MOD_YTR,
277 AFBC_FORMAT_MOD_SPARSE },
278 .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2), DIV_ROUND_UP(MAX_WIDTH, 2) },
279 }
280},
281{ .buffer_created = 0, .name = "YVU420 Modifier for inexistent plane",
282 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YVU420,
283 .handles = { 1, 1, 1 }, .flags = DRM_MODE_FB_MODIFIERS,
284 .modifier = { AFBC_FORMAT_MOD_SPARSE, AFBC_FORMAT_MOD_SPARSE,
285 AFBC_FORMAT_MOD_SPARSE, AFBC_FORMAT_MOD_SPARSE },
286 .pitches = { MAX_WIDTH, DIV_ROUND_UP(MAX_WIDTH, 2), DIV_ROUND_UP(MAX_WIDTH, 2) },
287 }
288},
289{ .buffer_created = 0, .name = "YUV420_10BIT Invalid modifier(DRM_FORMAT_MOD_LINEAR)",
290 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_YUV420_10BIT,
291 .handles = { 1, 0, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
292 .modifier = { DRM_FORMAT_MOD_LINEAR, 0, 0 },
293 .pitches = { MAX_WIDTH, 0, 0 },
294 }
295},
296{ .buffer_created = 1, .name = "X0L2 Normal sizes",
297 .cmd = { .width = 600, .height = 600, .pixel_format = DRM_FORMAT_X0L2,
298 .handles = { 1, 0, 0 }, .pitches = { 1200, 0, 0 }
299 }
300},
301{ .buffer_created = 1, .name = "X0L2 Max sizes",
302 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_X0L2,
303 .handles = { 1, 0, 0 }, .pitches = { 2 * MAX_WIDTH, 0, 0 }
304 }
305},
306{ .buffer_created = 0, .name = "X0L2 Invalid pitch",
307 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_X0L2,
308 .handles = { 1, 0, 0 }, .pitches = { 2 * MAX_WIDTH - 1, 0, 0 }
309 }
310},
311{ .buffer_created = 1, .name = "X0L2 Pitch greater than minimum required",
312 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_X0L2,
313 .handles = { 1, 0, 0 }, .pitches = { 2 * MAX_WIDTH + 1, 0, 0 }
314 }
315},
316{ .buffer_created = 0, .name = "X0L2 Handle for inexistent plane",
317 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_X0L2,
318 .handles = { 1, 1, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
319 .pitches = { 2 * MAX_WIDTH + 1, 0, 0 }
320 }
321},
322{ .buffer_created = 1,
323 .name = "X0L2 Offset for inexistent plane, without DRM_MODE_FB_MODIFIERS set",
324 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_X0L2,
325 .handles = { 1, 0, 0 }, .offsets = { 0, 0, 3 },
326 .pitches = { 2 * MAX_WIDTH + 1, 0, 0 }
327 }
328},
329{ .buffer_created = 0, .name = "X0L2 Modifier without DRM_MODE_FB_MODIFIERS set",
330 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_X0L2,
331 .handles = { 1, 0, 0 }, .pitches = { 2 * MAX_WIDTH + 1, 0, 0 },
332 .modifier = { AFBC_FORMAT_MOD_SPARSE, 0, 0 },
333 }
334},
335{ .buffer_created = 1, .name = "X0L2 Valid modifier",
336 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT, .pixel_format = DRM_FORMAT_X0L2,
337 .handles = { 1, 0, 0 }, .pitches = { 2 * MAX_WIDTH + 1, 0, 0 },
338 .modifier = { AFBC_FORMAT_MOD_SPARSE, 0, 0 }, .flags = DRM_MODE_FB_MODIFIERS,
339 }
340},
341{ .buffer_created = 0, .name = "X0L2 Modifier for inexistent plane",
342 .cmd = { .width = MAX_WIDTH, .height = MAX_HEIGHT,
343 .pixel_format = DRM_FORMAT_X0L2, .handles = { 1, 0, 0 },
344 .pitches = { 2 * MAX_WIDTH + 1, 0, 0 },
345 .modifier = { AFBC_FORMAT_MOD_SPARSE, AFBC_FORMAT_MOD_SPARSE, 0 },
346 .flags = DRM_MODE_FB_MODIFIERS,
347 }
348},
349};
350
351/*
352 * This struct is intended to provide a way to mocked functions communicate
353 * with the outer test when it can't be achieved by using its return value. In
354 * this way, the functions that receive the mocked drm_device, for example, can
355 * grab a reference to this and actually return something to be used on some
356 * expectation.
357 */
358struct drm_framebuffer_test_priv {
359 struct drm_device dev;
360 bool buffer_created;
361 bool buffer_freed;
362};
363
364static struct drm_framebuffer *fb_create_mock(struct drm_device *dev,
365 struct drm_file *file_priv,
366 const struct drm_format_info *info,
367 const struct drm_mode_fb_cmd2 *mode_cmd)
368{
369 struct drm_framebuffer_test_priv *priv = container_of(dev, typeof(*priv), dev);
370
371 priv->buffer_created = true;
372 return ERR_PTR(-EINVAL);
373}
374
375static struct drm_mode_config_funcs mock_config_funcs = {
376 .fb_create = fb_create_mock,
377};
378
379static int drm_framebuffer_test_init(struct kunit *test)
380{
381 struct device *parent;
382 struct drm_framebuffer_test_priv *priv;
383 struct drm_device *dev;
384
385 parent = drm_kunit_helper_alloc_device(test);
386 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent);
387
388 priv = drm_kunit_helper_alloc_drm_device(test, parent, typeof(*priv),
389 dev, 0);
390 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, priv);
391 dev = &priv->dev;
392
393 dev->mode_config.min_width = MIN_WIDTH;
394 dev->mode_config.max_width = MAX_WIDTH;
395 dev->mode_config.min_height = MIN_HEIGHT;
396 dev->mode_config.max_height = MAX_HEIGHT;
397 dev->mode_config.funcs = &mock_config_funcs;
398
399 test->priv = priv;
400 return 0;
401}
402
403static void drm_test_framebuffer_create(struct kunit *test)
404{
405 const struct drm_framebuffer_test *params = test->param_value;
406 struct drm_framebuffer_test_priv *priv = test->priv;
407 struct drm_device *dev = &priv->dev;
408
409 priv->buffer_created = false;
410 drm_internal_framebuffer_create(dev, &params->cmd, NULL);
411 KUNIT_EXPECT_EQ(test, params->buffer_created, priv->buffer_created);
412}
413
414static void drm_framebuffer_test_to_desc(const struct drm_framebuffer_test *t, char *desc)
415{
416 strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
417}
418
419KUNIT_ARRAY_PARAM(drm_framebuffer_create, drm_framebuffer_create_cases,
420 drm_framebuffer_test_to_desc);
421
422/* Tries to create a framebuffer with modifiers without drm_device supporting it */
423static void drm_test_framebuffer_modifiers_not_supported(struct kunit *test)
424{
425 struct drm_framebuffer_test_priv *priv = test->priv;
426 struct drm_device *dev = &priv->dev;
427 struct drm_framebuffer *fb;
428
429 /* A valid cmd with modifier */
430 struct drm_mode_fb_cmd2 cmd = {
431 .width = MAX_WIDTH, .height = MAX_HEIGHT,
432 .pixel_format = DRM_FORMAT_ABGR8888, .handles = { 1, 0, 0 },
433 .offsets = { UINT_MAX / 2, 0, 0 }, .pitches = { 4 * MAX_WIDTH, 0, 0 },
434 .flags = DRM_MODE_FB_MODIFIERS,
435 };
436
437 priv->buffer_created = false;
438 dev->mode_config.fb_modifiers_not_supported = 1;
439
440 fb = drm_internal_framebuffer_create(dev, &cmd, NULL);
441 KUNIT_EXPECT_EQ(test, priv->buffer_created, false);
442 KUNIT_EXPECT_EQ(test, PTR_ERR(fb), -EINVAL);
443}
444
445/* Parameters for testing drm_framebuffer_check_src_coords function */
446struct drm_framebuffer_check_src_coords_case {
447 const char *name;
448 const int expect;
449 const unsigned int fb_size;
450 const uint32_t src_x;
451 const uint32_t src_y;
452
453 /* Deltas to be applied on source */
454 const uint32_t dsrc_w;
455 const uint32_t dsrc_h;
456};
457
458static const struct drm_framebuffer_check_src_coords_case
459drm_framebuffer_check_src_coords_cases[] = {
460 { .name = "Success: source fits into fb",
461 .expect = 0,
462 },
463 { .name = "Fail: overflowing fb with x-axis coordinate",
464 .expect = -ENOSPC, .src_x = 1, .fb_size = UINT_MAX,
465 },
466 { .name = "Fail: overflowing fb with y-axis coordinate",
467 .expect = -ENOSPC, .src_y = 1, .fb_size = UINT_MAX,
468 },
469 { .name = "Fail: overflowing fb with source width",
470 .expect = -ENOSPC, .dsrc_w = 1, .fb_size = UINT_MAX - 1,
471 },
472 { .name = "Fail: overflowing fb with source height",
473 .expect = -ENOSPC, .dsrc_h = 1, .fb_size = UINT_MAX - 1,
474 },
475};
476
477static void drm_test_framebuffer_check_src_coords(struct kunit *test)
478{
479 const struct drm_framebuffer_check_src_coords_case *params = test->param_value;
480 const uint32_t src_x = params->src_x;
481 const uint32_t src_y = params->src_y;
482 const uint32_t src_w = (params->fb_size << 16) + params->dsrc_w;
483 const uint32_t src_h = (params->fb_size << 16) + params->dsrc_h;
484 const struct drm_framebuffer fb = {
485 .width = params->fb_size,
486 .height = params->fb_size
487 };
488 int ret;
489
490 ret = drm_framebuffer_check_src_coords(src_x, src_y, src_w, src_h, &fb);
491 KUNIT_EXPECT_EQ(test, ret, params->expect);
492}
493
494static void
495check_src_coords_test_to_desc(const struct drm_framebuffer_check_src_coords_case *t,
496 char *desc)
497{
498 strscpy(desc, t->name, KUNIT_PARAM_DESC_SIZE);
499}
500
501KUNIT_ARRAY_PARAM(check_src_coords, drm_framebuffer_check_src_coords_cases,
502 check_src_coords_test_to_desc);
503
504/*
505 * Test if drm_framebuffer_cleanup() really pops out the framebuffer object
506 * from device's fb_list and decrement the number of framebuffers for that
507 * device, which is the only things it does.
508 */
509static void drm_test_framebuffer_cleanup(struct kunit *test)
510{
511 struct drm_framebuffer_test_priv *priv = test->priv;
512 struct drm_device *dev = &priv->dev;
513 struct list_head *fb_list = &dev->mode_config.fb_list;
514 struct drm_format_info format = { };
515 struct drm_framebuffer fb1 = { .dev = dev, .format = &format };
516 struct drm_framebuffer fb2 = { .dev = dev, .format = &format };
517
518 /* This will result on [fb_list] -> fb2 -> fb1 */
519 drm_framebuffer_init(dev, &fb1, NULL);
520 drm_framebuffer_init(dev, &fb2, NULL);
521
522 drm_framebuffer_cleanup(&fb1);
523
524 /* Now fb2 is the only one element on fb_list */
525 KUNIT_ASSERT_TRUE(test, list_is_singular(&fb2.head));
526 KUNIT_ASSERT_EQ(test, dev->mode_config.num_fb, 1);
527
528 drm_framebuffer_cleanup(&fb2);
529
530 /* Now fb_list is empty */
531 KUNIT_ASSERT_TRUE(test, list_empty(fb_list));
532 KUNIT_ASSERT_EQ(test, dev->mode_config.num_fb, 0);
533}
534
535/*
536 * Initialize a framebuffer, lookup its id and test if the returned reference
537 * matches.
538 */
539static void drm_test_framebuffer_lookup(struct kunit *test)
540{
541 struct drm_framebuffer_test_priv *priv = test->priv;
542 struct drm_device *dev = &priv->dev;
543 struct drm_format_info format = { };
544 struct drm_framebuffer expected_fb = { .dev = dev, .format = &format };
545 struct drm_framebuffer *returned_fb;
546 uint32_t id = 0;
547 int ret;
548
549 ret = drm_framebuffer_init(dev, &expected_fb, NULL);
550 KUNIT_ASSERT_EQ(test, ret, 0);
551 id = expected_fb.base.id;
552
553 /* Looking for expected_fb */
554 returned_fb = drm_framebuffer_lookup(dev, NULL, id);
555 KUNIT_EXPECT_PTR_EQ(test, returned_fb, &expected_fb);
556 drm_framebuffer_put(returned_fb);
557
558 drm_framebuffer_cleanup(&expected_fb);
559}
560
561/* Try to lookup an id that is not linked to a framebuffer */
562static void drm_test_framebuffer_lookup_inexistent(struct kunit *test)
563{
564 struct drm_framebuffer_test_priv *priv = test->priv;
565 struct drm_device *dev = &priv->dev;
566 struct drm_framebuffer *fb;
567 uint32_t id = 0;
568
569 /* Looking for an inexistent framebuffer */
570 fb = drm_framebuffer_lookup(dev, NULL, id);
571 KUNIT_EXPECT_NULL(test, fb);
572}
573
574/*
575 * Test if drm_framebuffer_init initializes the framebuffer successfully,
576 * asserting that its modeset object struct and its refcount are correctly
577 * set and that strictly one framebuffer is initialized.
578 */
579static void drm_test_framebuffer_init(struct kunit *test)
580{
581 struct drm_framebuffer_test_priv *priv = test->priv;
582 struct drm_device *dev = &priv->dev;
583 struct drm_format_info format = { };
584 struct drm_framebuffer fb1 = { .dev = dev, .format = &format };
585 struct drm_framebuffer_funcs funcs = { };
586 int ret;
587
588 ret = drm_framebuffer_init(dev, &fb1, &funcs);
589 KUNIT_ASSERT_EQ(test, ret, 0);
590
591 /* Check if fb->funcs is actually set to the drm_framebuffer_funcs passed on */
592 KUNIT_EXPECT_PTR_EQ(test, fb1.funcs, &funcs);
593
594 /* The fb->comm must be set to the current running process */
595 KUNIT_EXPECT_STREQ(test, fb1.comm, current->comm);
596
597 /* The fb->base must be successfully initialized */
598 KUNIT_EXPECT_NE(test, fb1.base.id, 0);
599 KUNIT_EXPECT_EQ(test, fb1.base.type, DRM_MODE_OBJECT_FB);
600 KUNIT_EXPECT_EQ(test, kref_read(&fb1.base.refcount), 1);
601 KUNIT_EXPECT_PTR_EQ(test, fb1.base.free_cb, &drm_framebuffer_free);
602
603 /* There must be just that one fb initialized */
604 KUNIT_EXPECT_EQ(test, dev->mode_config.num_fb, 1);
605 KUNIT_EXPECT_PTR_EQ(test, dev->mode_config.fb_list.prev, &fb1.head);
606 KUNIT_EXPECT_PTR_EQ(test, dev->mode_config.fb_list.next, &fb1.head);
607
608 drm_framebuffer_cleanup(&fb1);
609}
610
611/* Try to init a framebuffer without setting its format */
612static void drm_test_framebuffer_init_bad_format(struct kunit *test)
613{
614 struct drm_framebuffer_test_priv *priv = test->priv;
615 struct drm_device *dev = &priv->dev;
616 struct drm_framebuffer fb1 = { .dev = dev, .format = NULL };
617 struct drm_framebuffer_funcs funcs = { };
618 int ret;
619
620 /* Fails if fb.format isn't set */
621 ret = drm_framebuffer_init(dev, &fb1, &funcs);
622 KUNIT_EXPECT_EQ(test, ret, -EINVAL);
623}
624
625/*
626 * Test calling drm_framebuffer_init() passing a framebuffer linked to a
627 * different drm_device parent from the one passed on the first argument, which
628 * must fail.
629 */
630static void drm_test_framebuffer_init_dev_mismatch(struct kunit *test)
631{
632 struct drm_framebuffer_test_priv *priv = test->priv;
633 struct drm_device *right_dev = &priv->dev;
634 struct drm_device *wrong_dev;
635 struct device *wrong_dev_parent;
636 struct drm_format_info format = { };
637 struct drm_framebuffer fb1 = { .dev = right_dev, .format = &format };
638 struct drm_framebuffer_funcs funcs = { };
639 int ret;
640
641 wrong_dev_parent = kunit_device_register(test, "drm-kunit-wrong-device-mock");
642 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, wrong_dev_parent);
643
644 wrong_dev = __drm_kunit_helper_alloc_drm_device(test, wrong_dev_parent,
645 sizeof(struct drm_device),
646 0, 0);
647 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, wrong_dev);
648
649 /* Fails if fb->dev doesn't point to the drm_device passed on first arg */
650 ret = drm_framebuffer_init(wrong_dev, &fb1, &funcs);
651 KUNIT_EXPECT_EQ(test, ret, -EINVAL);
652}
653
654static void destroy_free_mock(struct drm_framebuffer *fb)
655{
656 struct drm_framebuffer_test_priv *priv = container_of(fb->dev, typeof(*priv), dev);
657
658 priv->buffer_freed = true;
659}
660
661static struct drm_framebuffer_funcs framebuffer_funcs_free_mock = {
662 .destroy = destroy_free_mock,
663};
664
665/*
666 * In summary, the drm_framebuffer_free() function must implicitly call
667 * fb->funcs->destroy() and garantee that the framebufer object is unregistered
668 * from the drm_device idr pool.
669 */
670static void drm_test_framebuffer_free(struct kunit *test)
671{
672 struct drm_framebuffer_test_priv *priv = test->priv;
673 struct drm_device *dev = &priv->dev;
674 struct drm_mode_object *obj;
675 struct drm_framebuffer fb = {
676 .dev = dev,
677 .funcs = &framebuffer_funcs_free_mock,
678 };
679 int id, ret;
680
681 priv->buffer_freed = false;
682
683 /*
684 * Mock a framebuffer that was not unregistered at the moment of the
685 * drm_framebuffer_free() call.
686 */
687 ret = drm_mode_object_add(dev, &fb.base, DRM_MODE_OBJECT_FB);
688 KUNIT_ASSERT_EQ(test, ret, 0);
689 id = fb.base.id;
690
691 drm_framebuffer_free(&fb.base.refcount);
692
693 /* The framebuffer object must be unregistered */
694 obj = drm_mode_object_find(dev, NULL, id, DRM_MODE_OBJECT_FB);
695 KUNIT_EXPECT_PTR_EQ(test, obj, NULL);
696 KUNIT_EXPECT_EQ(test, fb.base.id, 0);
697
698 /* Test if fb->funcs->destroy() was called */
699 KUNIT_EXPECT_EQ(test, priv->buffer_freed, true);
700}
701
702static struct kunit_case drm_framebuffer_tests[] = {
703 KUNIT_CASE_PARAM(drm_test_framebuffer_check_src_coords, check_src_coords_gen_params),
704 KUNIT_CASE(drm_test_framebuffer_cleanup),
705 KUNIT_CASE_PARAM(drm_test_framebuffer_create, drm_framebuffer_create_gen_params),
706 KUNIT_CASE(drm_test_framebuffer_free),
707 KUNIT_CASE(drm_test_framebuffer_init),
708 KUNIT_CASE(drm_test_framebuffer_init_bad_format),
709 KUNIT_CASE(drm_test_framebuffer_init_dev_mismatch),
710 KUNIT_CASE(drm_test_framebuffer_lookup),
711 KUNIT_CASE(drm_test_framebuffer_lookup_inexistent),
712 KUNIT_CASE(drm_test_framebuffer_modifiers_not_supported),
713 { }
714};
715
716static struct kunit_suite drm_framebuffer_test_suite = {
717 .name = "drm_framebuffer",
718 .init = drm_framebuffer_test_init,
719 .test_cases = drm_framebuffer_tests,
720};
721
722kunit_test_suite(drm_framebuffer_test_suite);
723
724MODULE_DESCRIPTION("Test cases for the drm_framebuffer functions");
725MODULE_LICENSE("GPL");