drivers/gpu/drm/selftests/test-drm_plane_helper.c

   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
  14 #define TESTS "drm_plane_helper_selftests.h"
  15 #include "drm_selftest.h"
  16
  17 static void set_src(struct drm_plane_state *plane_state,
  18                     unsigned src_x, unsigned src_y,
  19                     unsigned src_w, unsigned src_h)
  20 {
  21         plane_state->src_x = src_x;
  22         plane_state->src_y = src_y;
  23         plane_state->src_w = src_w;
  24         plane_state->src_h = src_h;
  25 }
  26
  27 static bool check_src_eq(struct drm_plane_state *plane_state,
  28                          unsigned src_x, unsigned src_y,
  29                          unsigned src_w, unsigned src_h)
  30 {
  31         if (plane_state->src.x1 < 0) {
  32                 pr_err("src x coordinate %x should never be below 0.\n", plane_state->src.x1);
  33                 drm_rect_debug_print("src: ", &plane_state->src, true);
  34                 return false;
  35         }
  36         if (plane_state->src.y1 < 0) {
  37                 pr_err("src y coordinate %x should never be below 0.\n", plane_state->src.y1);
  38                 drm_rect_debug_print("src: ", &plane_state->src, true);
  39                 return false;
  40         }
  41
  42         if (plane_state->src.x1 != src_x ||
  43             plane_state->src.y1 != src_y ||
  44             drm_rect_width(&plane_state->src) != src_w ||
  45             drm_rect_height(&plane_state->src) != src_h) {
  46                 drm_rect_debug_print("src: ", &plane_state->src, true);
  47                 return false;
  48         }
  49
  50         return true;
  51 }
  52
  53 static void set_crtc(struct drm_plane_state *plane_state,
  54                      int crtc_x, int crtc_y,
  55                      unsigned crtc_w, unsigned crtc_h)
  56 {
  57         plane_state->crtc_x = crtc_x;
  58         plane_state->crtc_y = crtc_y;
  59         plane_state->crtc_w = crtc_w;
  60         plane_state->crtc_h = crtc_h;
  61 }
  62
  63 static bool check_crtc_eq(struct drm_plane_state *plane_state,
  64                           int crtc_x, int crtc_y,
  65                           unsigned crtc_w, unsigned crtc_h)
  66 {
  67         if (plane_state->dst.x1 != crtc_x ||
  68             plane_state->dst.y1 != crtc_y ||
  69             drm_rect_width(&plane_state->dst) != crtc_w ||
  70             drm_rect_height(&plane_state->dst) != crtc_h) {
  71                 drm_rect_debug_print("dst: ", &plane_state->dst, false);
  72
  73                 return false;
  74         }
  75
  76         return true;
  77 }
  78
  79 static int igt_check_plane_state(void *ignored)
  80 {
  81         int ret;
  82
  83         const struct drm_crtc_state crtc_state = {
  84                 .crtc = ZERO_SIZE_PTR,
  85                 .enable = true,
  86                 .active = true,
  87                 .mode = {
  88                         DRM_MODE("1024x768", 0, 65000, 1024, 1048,
  89                                 1184, 1344, 0, 768, 771, 777, 806, 0,
  90                                 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
  91                 },
  92         };
  93         struct drm_framebuffer fb = {
  94                 .width = 2048,
  95                 .height = 2048
  96         };
  97         struct drm_plane_state plane_state = {
  98                 .crtc = ZERO_SIZE_PTR,
  99                 .fb = &fb,
 100                 .rotation = DRM_MODE_ROTATE_0
 101         };
 102
 103         /* Simple clipping, no scaling. */
 104         set_src(&plane_state, 0, 0, fb.width << 16, fb.height << 16);
 105         set_crtc(&plane_state, 0, 0, fb.width, fb.height);
 106         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 107                                                   DRM_PLANE_HELPER_NO_SCALING,
 108                                                   DRM_PLANE_HELPER_NO_SCALING,
 109                                                   false, false);
 110         FAIL(ret < 0, "Simple clipping check should pass\n");
 111         FAIL_ON(!plane_state.visible);
 112         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1024 << 16, 768 << 16));
 113         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 114
 115         /* Rotated clipping + reflection, no scaling. */
 116         plane_state.rotation = DRM_MODE_ROTATE_90 | DRM_MODE_REFLECT_X;
 117         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 118                                                   DRM_PLANE_HELPER_NO_SCALING,
 119                                                   DRM_PLANE_HELPER_NO_SCALING,
 120                                                   false, false);
 121         FAIL(ret < 0, "Rotated clipping check should pass\n");
 122         FAIL_ON(!plane_state.visible);
 123         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 768 << 16, 1024 << 16));
 124         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 125         plane_state.rotation = DRM_MODE_ROTATE_0;
 126
 127         /* Check whether positioning works correctly. */
 128         set_src(&plane_state, 0, 0, 1023 << 16, 767 << 16);
 129         set_crtc(&plane_state, 0, 0, 1023, 767);
 130         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 131                                                   DRM_PLANE_HELPER_NO_SCALING,
 132                                                   DRM_PLANE_HELPER_NO_SCALING,
 133                                                   false, false);
 134         FAIL(!ret, "Should not be able to position on the crtc with can_position=false\n");
 135
 136         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 137                                                   DRM_PLANE_HELPER_NO_SCALING,
 138                                                   DRM_PLANE_HELPER_NO_SCALING,
 139                                                   true, false);
 140         FAIL(ret < 0, "Simple positioning should work\n");
 141         FAIL_ON(!plane_state.visible);
 142         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1023 << 16, 767 << 16));
 143         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1023, 767));
 144
 145         /* Simple scaling tests. */
 146         set_src(&plane_state, 0, 0, 512 << 16, 384 << 16);
 147         set_crtc(&plane_state, 0, 0, 1024, 768);
 148         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 149                                                   0x8001,
 150                                                   DRM_PLANE_HELPER_NO_SCALING,
 151                                                   false, false);
 152         FAIL(!ret, "Upscaling out of range should fail.\n");
 153         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 154                                                   0x8000,
 155                                                   DRM_PLANE_HELPER_NO_SCALING,
 156                                                   false, false);
 157         FAIL(ret < 0, "Upscaling exactly 2x should work\n");
 158         FAIL_ON(!plane_state.visible);
 159         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 512 << 16, 384 << 16));
 160         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 161
 162         set_src(&plane_state, 0, 0, 2048 << 16, 1536 << 16);
 163         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 164                                                   DRM_PLANE_HELPER_NO_SCALING,
 165                                                   0x1ffff, false, false);
 166         FAIL(!ret, "Downscaling out of range should fail.\n");
 167         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 168                                                   DRM_PLANE_HELPER_NO_SCALING,
 169                                                   0x20000, false, false);
 170         FAIL(ret < 0, "Should succeed with exact scaling limit\n");
 171         FAIL_ON(!plane_state.visible);
 172         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2048 << 16, 1536 << 16));
 173         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 174
 175         /* Testing rounding errors. */
 176         set_src(&plane_state, 0, 0, 0x40001, 0x40001);
 177         set_crtc(&plane_state, 1022, 766, 4, 4);
 178         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 179                                                   DRM_PLANE_HELPER_NO_SCALING,
 180                                                   0x10001,
 181                                                   true, false);
 182         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 183         FAIL_ON(!plane_state.visible);
 184         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
 185         FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));
 186
 187         set_src(&plane_state, 0x20001, 0x20001, 0x4040001, 0x3040001);
 188         set_crtc(&plane_state, -2, -2, 1028, 772);
 189         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 190                                                   DRM_PLANE_HELPER_NO_SCALING,
 191                                                   0x10001,
 192                                                   false, false);
 193         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 194         FAIL_ON(!plane_state.visible);
 195         FAIL_ON(!check_src_eq(&plane_state, 0x40002, 0x40002, 1024 << 16, 768 << 16));
 196         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 197
 198         set_src(&plane_state, 0, 0, 0x3ffff, 0x3ffff);
 199         set_crtc(&plane_state, 1022, 766, 4, 4);
 200         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 201                                                   0xffff,
 202                                                   DRM_PLANE_HELPER_NO_SCALING,
 203                                                   true, false);
 204         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 205         FAIL_ON(!plane_state.visible);
 206         /* Should not be rounded to 0x20001, which would be upscaling. */
 207         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
 208         FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));
 209
 210         set_src(&plane_state, 0x1ffff, 0x1ffff, 0x403ffff, 0x303ffff);
 211         set_crtc(&plane_state, -2, -2, 1028, 772);
 212         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 213                                                   0xffff,
 214                                                   DRM_PLANE_HELPER_NO_SCALING,
 215                                                   false, false);
 216         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 217         FAIL_ON(!plane_state.visible);
 218         FAIL_ON(!check_src_eq(&plane_state, 0x3fffe, 0x3fffe, 1024 << 16, 768 << 16));
 219         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 220
 221         return 0;
 222 }
 223
 224 #include "drm_selftest.c"
 225
 226 /**
 227  * test_drm_plane_helper - Run drm plane helper selftests.
 228  */
 229 int test_drm_plane_helper(void)
 230 {
 231         int err;
 232
 233         err = run_selftests(selftests, ARRAY_SIZE(selftests), NULL);
 234
 235         return err > 0 ? 0 : err;
 236 }