summaryrefslogtreecommitdiff
path: root/tests/kms_dither.c
blob: 8e18dc834c9849c36262a3e99bf76470208ce4f2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
/*
 * Copyright © 2020 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *     Bhanuprakash Modem <bhanuprakash.modem@intel.com>
 *
 */

#include "igt.h"
#include <fcntl.h>
#include <termios.h>
#include <unistd.h>

IGT_TEST_DESCRIPTION("Test Dithering block status");

/* Connector BPC */
#define IGT_CONNECTOR_BPC_6		6
#define IGT_CONNECTOR_BPC_8		8
#define IGT_CONNECTOR_BPC_10		10

/* Framebuffer BPC */
#define IGT_FRAME_BUFFER_BPC_8		8
#define IGT_FRAME_BUFFER_BPC_10		10
#define IGT_FRAME_BUFFER_BPC_16		16

/* Common test data. */
typedef struct data {
	igt_display_t display;
	igt_plane_t *primary;
	igt_output_t *output;
	igt_pipe_t *pipe;
	drmModeModeInfo *mode;
	enum pipe pipe_id;
	int drm_fd;
	igt_fb_t fb;
} data_t;

typedef struct {
	unsigned int bpc;
	unsigned int dither;
} dither_status_t;

/* Prepare test data. */
static void prepare_test(data_t *data, igt_output_t *output, enum pipe pipe)
{
	igt_display_t *display = &data->display;

	data->pipe_id = pipe;
	data->pipe = &data->display.pipes[data->pipe_id];
	igt_assert(data->pipe);

	igt_display_reset(display);

	data->output = output;
	igt_assert(data->output);

	data->mode = igt_output_get_mode(data->output);
	igt_assert(data->mode);

	data->primary =
		igt_pipe_get_plane_type(data->pipe, DRM_PLANE_TYPE_PRIMARY);

	igt_output_set_pipe(data->output, data->pipe_id);
}

/* Returns the current state of dithering from the crtc debugfs. */
static dither_status_t get_dither_state(data_t *data)
{
	char buf[512], tmp[5];
	char *start_loc;
	int dir, res;
	dither_status_t status;

	dir = igt_debugfs_dir(data->drm_fd);
	igt_assert(dir >= 0);

	igt_require_intel(data->drm_fd);

	res = igt_debugfs_simple_read(dir, "i915_display_info", buf, sizeof(buf));
	igt_require(res > 0);
	close(dir);

	igt_assert(start_loc = strstr(buf, ", bpp="));
	igt_assert_eq(sscanf(start_loc, ", bpp=%u", &status.bpc), 1);
	status.bpc /= 3;

	igt_assert(start_loc = strstr(buf, ", dither="));
	igt_assert_eq(sscanf(start_loc, ", dither=%s", tmp), 1);
	status.dither = !strcmp(tmp, "yes,");

	return status;
}

static void test_dithering(data_t *data, enum pipe pipe,
			   igt_output_t *output,
			   int fb_bpc, int fb_format,
			   int output_bpc)
{
	igt_display_t *display = &data->display;
	dither_status_t status;
	int bpc, ret;

	igt_info("Dithering test execution on %s PIPE_%s\n",
			output->name, kmstest_pipe_name(pipe));
	prepare_test(data, output, pipe);

	igt_assert(igt_create_fb(data->drm_fd, data->mode->hdisplay,
				 data->mode->vdisplay, fb_format,
				 DRM_FORMAT_MOD_LINEAR, &data->fb));
	igt_plane_set_fb(data->primary, &data->fb);
	igt_plane_set_size(data->primary, data->mode->hdisplay, data->mode->vdisplay);

	bpc = igt_output_get_prop(output, IGT_CONNECTOR_MAX_BPC);
	igt_output_set_prop_value(data->output, IGT_CONNECTOR_MAX_BPC, output_bpc);

	if (display->is_atomic)
		ret = igt_display_try_commit_atomic(display,
					DRM_MODE_ATOMIC_TEST_ONLY |
					DRM_MODE_ATOMIC_ALLOW_MODESET,
					NULL);
	else
		ret = igt_display_try_commit2(display, COMMIT_LEGACY);

	igt_require_f(!ret, "%s don't support %d-bpc\n",
				output->name, output_bpc);

	igt_display_commit2(display, display->is_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY);

	/*
	 * Check the status of Dithering block:
	 *
	 * Preserve the result & compute later (after clean-up).
	 * If fb_bpc is greater than output_bpc, Dithering should be enabled
	 * Else disabled
	 */
	status = get_dither_state(data);

	igt_info("FB BPC:%d, Panel BPC:%d, Pipe BPC:%d, Expected Dither:%s, Actual result:%s\n",
		  fb_bpc, output_bpc, status.bpc,
		  (fb_bpc > output_bpc) ? "Enable": "Disable",
		  status.dither ? "Enable": "Disable");

       /*
	* We must update the Connector max_bpc property back
	* Otherwise, previously updated value will stay forever and
	* may cause the failures for next/other subtests.
	*/
	igt_output_set_prop_value(data->output, IGT_CONNECTOR_MAX_BPC, bpc);
	igt_plane_set_fb(data->primary, NULL);
	igt_output_set_pipe(output, PIPE_NONE);
	igt_display_commit2(display, display->is_atomic ? COMMIT_ATOMIC : COMMIT_LEGACY);
	igt_remove_fb(data->drm_fd, &data->fb);

	/* Check if crtc bpc is updated with requested one. */
	igt_require_f((status.bpc == output_bpc),
			"%s can support max %u-bpc, but requested %d-bpc\n",
				output->name, status.bpc, output_bpc);

	/* Compute the result. */
	if (fb_bpc > output_bpc)
		igt_assert_f(status.dither, "(fb_%dbpc > output_%dbpc): Dither should be enabled\n",
				fb_bpc, output_bpc);
	else
		igt_assert_f(!status.dither, "(fb_%dbpc <= output_%dbpc): Dither should be disabled\n",
				fb_bpc, output_bpc);

	return;
}

/* Returns true if an output supports max bpc property. */
static bool is_supported(igt_output_t *output)
{
        return igt_output_has_prop(output, IGT_CONNECTOR_MAX_BPC) &&
		igt_output_get_prop(output, IGT_CONNECTOR_MAX_BPC);
}

static void
run_dither_test(data_t *data, int fb_bpc, int fb_format, int output_bpc)
{
	igt_output_t *output;
	igt_display_t *display = &data->display;

	for_each_connected_output(display, output) {
		enum pipe pipe;

		if (!is_supported(output))
			continue;

		for_each_pipe(display, pipe) {
			if (igt_pipe_connector_valid(pipe, output)) {
				igt_dynamic_f("%s-pipe-%s", output->name, kmstest_pipe_name(pipe))
					test_dithering(data, pipe, output, fb_bpc,
							fb_format, output_bpc);

				/* One pipe is enough */
				break;
			}
		}
	}
}

igt_main
{
	struct {
		int fb_bpc;
		int format;
		int output_bpc;
	} tests[] = {
		{ IGT_FRAME_BUFFER_BPC_8, DRM_FORMAT_XRGB8888, IGT_CONNECTOR_BPC_6 },
		{ IGT_FRAME_BUFFER_BPC_8, DRM_FORMAT_XRGB8888, IGT_CONNECTOR_BPC_8 },
	};
	int i;
	data_t data = { 0 };

	igt_fixture {
		data.drm_fd = drm_open_driver_master(DRIVER_ANY);
		kmstest_set_vt_graphics_mode();

		igt_display_require(&data.display, data.drm_fd);
		igt_display_require_output(&data.display);
	}

	for (i = 0; i < ARRAY_SIZE(tests); i++) {
		igt_describe_f("Framebuffer BPC:%d, Panel BPC:%d, Expected Dither:%s\n",
			       tests[i].fb_bpc, tests[i].output_bpc,
			       (tests[i].fb_bpc > tests[i].output_bpc) ?
							"Enable": "Disable");

		igt_subtest_with_dynamic_f("FB-%dBPC-Vs-Panel-%dBPC",
				tests[i].fb_bpc, tests[i].output_bpc)
			run_dither_test(&data,
					tests[i].fb_bpc,
					tests[i].format,
					tests[i].output_bpc);
	}

	igt_fixture {
		igt_display_fini(&data.display);
	}
}