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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Test cases for the drm_plane_helper functions
4 */
5
6#define pr_fmt(fmt) "drm_plane_helper: " fmt
7
8#include <drm/drm_atomic_helper.h>
9#include <drm/drm_plane_helper.h>
10#include <drm/drm_modes.h>
11
12#include "test-drm_modeset_common.h"
13
14static void set_src(struct drm_plane_state *plane_state,
15 unsigned src_x, unsigned src_y,
16 unsigned src_w, unsigned src_h)
17{
18 plane_state->src_x = src_x;
19 plane_state->src_y = src_y;
20 plane_state->src_w = src_w;
21 plane_state->src_h = src_h;
22}
23
24static bool check_src_eq(struct drm_plane_state *plane_state,
25 unsigned src_x, unsigned src_y,
26 unsigned src_w, unsigned src_h)
27{
28 if (plane_state->src.x1 < 0) {
29 pr_err("src x coordinate %x should never be below 0.\n", plane_state->src.x1);
30 drm_rect_debug_print("src: ", &plane_state->src, true);
31 return false;
32 }
33 if (plane_state->src.y1 < 0) {
34 pr_err("src y coordinate %x should never be below 0.\n", plane_state->src.y1);
35 drm_rect_debug_print("src: ", &plane_state->src, true);
36 return false;
37 }
38
39 if (plane_state->src.x1 != src_x ||
40 plane_state->src.y1 != src_y ||
41 drm_rect_width(&plane_state->src) != src_w ||
42 drm_rect_height(&plane_state->src) != src_h) {
43 drm_rect_debug_print("src: ", &plane_state->src, true);
44 return false;
45 }
46
47 return true;
48}
49
50static void set_crtc(struct drm_plane_state *plane_state,
51 int crtc_x, int crtc_y,
52 unsigned crtc_w, unsigned crtc_h)
53{
54 plane_state->crtc_x = crtc_x;
55 plane_state->crtc_y = crtc_y;
56 plane_state->crtc_w = crtc_w;
57 plane_state->crtc_h = crtc_h;
58}
59
60static bool check_crtc_eq(struct drm_plane_state *plane_state,
61 int crtc_x, int crtc_y,
62 unsigned crtc_w, unsigned crtc_h)
63{
64 if (plane_state->dst.x1 != crtc_x ||
65 plane_state->dst.y1 != crtc_y ||
66 drm_rect_width(&plane_state->dst) != crtc_w ||
67 drm_rect_height(&plane_state->dst) != crtc_h) {
68 drm_rect_debug_print("dst: ", &plane_state->dst, false);
69
70 return false;
71 }
72
73 return true;
74}
75
76int igt_check_plane_state(void *ignored)
77{
78 int ret;
79
80 const struct drm_crtc_state crtc_state = {
81 .crtc = ZERO_SIZE_PTR,
82 .enable = true,
83 .active = true,
84 .mode = {
85 DRM_MODE("1024x768", 0, 65000, 1024, 1048,
86 1184, 1344, 0, 768, 771, 777, 806, 0,
87 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
88 },
89 };
90 struct drm_framebuffer fb = {
91 .width = 2048,
92 .height = 2048
93 };
94 struct drm_plane_state plane_state = {
95 .crtc = ZERO_SIZE_PTR,
96 .fb = &fb,
97 .rotation = DRM_MODE_ROTATE_0
98 };
99
100 /* Simple clipping, no scaling. */
101 set_src(&plane_state, 0, 0, fb.width << 16, fb.height << 16);
102 set_crtc(&plane_state, 0, 0, fb.width, fb.height);
103 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
104 DRM_PLANE_HELPER_NO_SCALING,
105 DRM_PLANE_HELPER_NO_SCALING,
106 false, false);
107 FAIL(ret < 0, "Simple clipping check should pass\n");
108 FAIL_ON(!plane_state.visible);
109 FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1024 << 16, 768 << 16));
110 FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
111
112 /* Rotated clipping + reflection, no scaling. */
113 plane_state.rotation = DRM_MODE_ROTATE_90 | DRM_MODE_REFLECT_X;
114 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
115 DRM_PLANE_HELPER_NO_SCALING,
116 DRM_PLANE_HELPER_NO_SCALING,
117 false, false);
118 FAIL(ret < 0, "Rotated clipping check should pass\n");
119 FAIL_ON(!plane_state.visible);
120 FAIL_ON(!check_src_eq(&plane_state, 0, 0, 768 << 16, 1024 << 16));
121 FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
122 plane_state.rotation = DRM_MODE_ROTATE_0;
123
124 /* Check whether positioning works correctly. */
125 set_src(&plane_state, 0, 0, 1023 << 16, 767 << 16);
126 set_crtc(&plane_state, 0, 0, 1023, 767);
127 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
128 DRM_PLANE_HELPER_NO_SCALING,
129 DRM_PLANE_HELPER_NO_SCALING,
130 false, false);
131 FAIL(!ret, "Should not be able to position on the crtc with can_position=false\n");
132
133 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
134 DRM_PLANE_HELPER_NO_SCALING,
135 DRM_PLANE_HELPER_NO_SCALING,
136 true, false);
137 FAIL(ret < 0, "Simple positioning should work\n");
138 FAIL_ON(!plane_state.visible);
139 FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1023 << 16, 767 << 16));
140 FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1023, 767));
141
142 /* Simple scaling tests. */
143 set_src(&plane_state, 0, 0, 512 << 16, 384 << 16);
144 set_crtc(&plane_state, 0, 0, 1024, 768);
145 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
146 0x8001,
147 DRM_PLANE_HELPER_NO_SCALING,
148 false, false);
149 FAIL(!ret, "Upscaling out of range should fail.\n");
150 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
151 0x8000,
152 DRM_PLANE_HELPER_NO_SCALING,
153 false, false);
154 FAIL(ret < 0, "Upscaling exactly 2x should work\n");
155 FAIL_ON(!plane_state.visible);
156 FAIL_ON(!check_src_eq(&plane_state, 0, 0, 512 << 16, 384 << 16));
157 FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
158
159 set_src(&plane_state, 0, 0, 2048 << 16, 1536 << 16);
160 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
161 DRM_PLANE_HELPER_NO_SCALING,
162 0x1ffff, false, false);
163 FAIL(!ret, "Downscaling out of range should fail.\n");
164 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
165 DRM_PLANE_HELPER_NO_SCALING,
166 0x20000, false, false);
167 FAIL(ret < 0, "Should succeed with exact scaling limit\n");
168 FAIL_ON(!plane_state.visible);
169 FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2048 << 16, 1536 << 16));
170 FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
171
172 /* Testing rounding errors. */
173 set_src(&plane_state, 0, 0, 0x40001, 0x40001);
174 set_crtc(&plane_state, 1022, 766, 4, 4);
175 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
176 DRM_PLANE_HELPER_NO_SCALING,
177 0x10001,
178 true, false);
179 FAIL(ret < 0, "Should succeed by clipping to exact multiple");
180 FAIL_ON(!plane_state.visible);
181 FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
182 FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));
183
184 set_src(&plane_state, 0x20001, 0x20001, 0x4040001, 0x3040001);
185 set_crtc(&plane_state, -2, -2, 1028, 772);
186 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
187 DRM_PLANE_HELPER_NO_SCALING,
188 0x10001,
189 false, false);
190 FAIL(ret < 0, "Should succeed by clipping to exact multiple");
191 FAIL_ON(!plane_state.visible);
192 FAIL_ON(!check_src_eq(&plane_state, 0x40002, 0x40002, 1024 << 16, 768 << 16));
193 FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
194
195 set_src(&plane_state, 0, 0, 0x3ffff, 0x3ffff);
196 set_crtc(&plane_state, 1022, 766, 4, 4);
197 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
198 0xffff,
199 DRM_PLANE_HELPER_NO_SCALING,
200 true, false);
201 FAIL(ret < 0, "Should succeed by clipping to exact multiple");
202 FAIL_ON(!plane_state.visible);
203 /* Should not be rounded to 0x20001, which would be upscaling. */
204 FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
205 FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));
206
207 set_src(&plane_state, 0x1ffff, 0x1ffff, 0x403ffff, 0x303ffff);
208 set_crtc(&plane_state, -2, -2, 1028, 772);
209 ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
210 0xffff,
211 DRM_PLANE_HELPER_NO_SCALING,
212 false, false);
213 FAIL(ret < 0, "Should succeed by clipping to exact multiple");
214 FAIL_ON(!plane_state.visible);
215 FAIL_ON(!check_src_eq(&plane_state, 0x3fffe, 0x3fffe, 1024 << 16, 768 << 16));
216 FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
217
218 return 0;
219}