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_framebuffer.h>
  10 #include <drm/drm_plane_helper.h>
  11 #include <drm/drm_modes.h>
  12
  13 #include "test-drm_modeset_common.h"
  14
  15 static void set_src(struct drm_plane_state *plane_state,
  16                     unsigned src_x, unsigned src_y,
  17                     unsigned src_w, unsigned src_h)
  18 {
  19         plane_state->src_x = src_x;
  20         plane_state->src_y = src_y;
  21         plane_state->src_w = src_w;
  22         plane_state->src_h = src_h;
  23 }
  24
  25 static bool check_src_eq(struct drm_plane_state *plane_state,
  26                          unsigned src_x, unsigned src_y,
  27                          unsigned src_w, unsigned src_h)
  28 {
  29         if (plane_state->src.x1 < 0) {
  30                 pr_err("src x coordinate %x should never be below 0.\n", plane_state->src.x1);
  31                 drm_rect_debug_print("src: ", &plane_state->src, true);
  32                 return false;
  33         }
  34         if (plane_state->src.y1 < 0) {
  35                 pr_err("src y coordinate %x should never be below 0.\n", plane_state->src.y1);
  36                 drm_rect_debug_print("src: ", &plane_state->src, true);
  37                 return false;
  38         }
  39
  40         if (plane_state->src.x1 != src_x ||
  41             plane_state->src.y1 != src_y ||
  42             drm_rect_width(&plane_state->src) != src_w ||
  43             drm_rect_height(&plane_state->src) != src_h) {
  44                 drm_rect_debug_print("src: ", &plane_state->src, true);
  45                 return false;
  46         }
  47
  48         return true;
  49 }
  50
  51 static void set_crtc(struct drm_plane_state *plane_state,
  52                      int crtc_x, int crtc_y,
  53                      unsigned crtc_w, unsigned crtc_h)
  54 {
  55         plane_state->crtc_x = crtc_x;
  56         plane_state->crtc_y = crtc_y;
  57         plane_state->crtc_w = crtc_w;
  58         plane_state->crtc_h = crtc_h;
  59 }
  60
  61 static bool check_crtc_eq(struct drm_plane_state *plane_state,
  62                           int crtc_x, int crtc_y,
  63                           unsigned crtc_w, unsigned crtc_h)
  64 {
  65         if (plane_state->dst.x1 != crtc_x ||
  66             plane_state->dst.y1 != crtc_y ||
  67             drm_rect_width(&plane_state->dst) != crtc_w ||
  68             drm_rect_height(&plane_state->dst) != crtc_h) {
  69                 drm_rect_debug_print("dst: ", &plane_state->dst, false);
  70
  71                 return false;
  72         }
  73
  74         return true;
  75 }
  76
  77 int igt_check_plane_state(void *ignored)
  78 {
  79         int ret;
  80
  81         static const struct drm_crtc_state crtc_state = {
  82                 .crtc = ZERO_SIZE_PTR,
  83                 .enable = true,
  84                 .active = true,
  85                 .mode = {
  86                         DRM_MODE("1024x768", 0, 65000, 1024, 1048,
  87                                 1184, 1344, 0, 768, 771, 777, 806, 0,
  88                                 DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC)
  89                 },
  90         };
  91         static struct drm_plane plane = {
  92                 .dev = NULL
  93         };
  94         static struct drm_framebuffer fb = {
  95                 .width = 2048,
  96                 .height = 2048
  97         };
  98         static struct drm_plane_state plane_state = {
  99                 .plane = &plane,
 100                 .crtc = ZERO_SIZE_PTR,
 101                 .fb = &fb,
 102                 .rotation = DRM_MODE_ROTATE_0
 103         };
 104
 105         /* Simple clipping, no scaling. */
 106         set_src(&plane_state, 0, 0, fb.width << 16, fb.height << 16);
 107         set_crtc(&plane_state, 0, 0, fb.width, fb.height);
 108         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 109                                                   DRM_PLANE_HELPER_NO_SCALING,
 110                                                   DRM_PLANE_HELPER_NO_SCALING,
 111                                                   false, false);
 112         FAIL(ret < 0, "Simple clipping check should pass\n");
 113         FAIL_ON(!plane_state.visible);
 114         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1024 << 16, 768 << 16));
 115         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 116
 117         /* Rotated clipping + reflection, no scaling. */
 118         plane_state.rotation = DRM_MODE_ROTATE_90 | DRM_MODE_REFLECT_X;
 119         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 120                                                   DRM_PLANE_HELPER_NO_SCALING,
 121                                                   DRM_PLANE_HELPER_NO_SCALING,
 122                                                   false, false);
 123         FAIL(ret < 0, "Rotated clipping check should pass\n");
 124         FAIL_ON(!plane_state.visible);
 125         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 768 << 16, 1024 << 16));
 126         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 127         plane_state.rotation = DRM_MODE_ROTATE_0;
 128
 129         /* Check whether positioning works correctly. */
 130         set_src(&plane_state, 0, 0, 1023 << 16, 767 << 16);
 131         set_crtc(&plane_state, 0, 0, 1023, 767);
 132         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 133                                                   DRM_PLANE_HELPER_NO_SCALING,
 134                                                   DRM_PLANE_HELPER_NO_SCALING,
 135                                                   false, false);
 136         FAIL(!ret, "Should not be able to position on the crtc with can_position=false\n");
 137
 138         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 139                                                   DRM_PLANE_HELPER_NO_SCALING,
 140                                                   DRM_PLANE_HELPER_NO_SCALING,
 141                                                   true, false);
 142         FAIL(ret < 0, "Simple positioning should work\n");
 143         FAIL_ON(!plane_state.visible);
 144         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1023 << 16, 767 << 16));
 145         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1023, 767));
 146
 147         /* Simple scaling tests. */
 148         set_src(&plane_state, 0, 0, 512 << 16, 384 << 16);
 149         set_crtc(&plane_state, 0, 0, 1024, 768);
 150         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 151                                                   0x8001,
 152                                                   DRM_PLANE_HELPER_NO_SCALING,
 153                                                   false, false);
 154         FAIL(!ret, "Upscaling out of range should fail.\n");
 155         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 156                                                   0x8000,
 157                                                   DRM_PLANE_HELPER_NO_SCALING,
 158                                                   false, false);
 159         FAIL(ret < 0, "Upscaling exactly 2x should work\n");
 160         FAIL_ON(!plane_state.visible);
 161         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 512 << 16, 384 << 16));
 162         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 163
 164         set_src(&plane_state, 0, 0, 2048 << 16, 1536 << 16);
 165         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 166                                                   DRM_PLANE_HELPER_NO_SCALING,
 167                                                   0x1ffff, false, false);
 168         FAIL(!ret, "Downscaling out of range should fail.\n");
 169         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 170                                                   DRM_PLANE_HELPER_NO_SCALING,
 171                                                   0x20000, false, false);
 172         FAIL(ret < 0, "Should succeed with exact scaling limit\n");
 173         FAIL_ON(!plane_state.visible);
 174         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2048 << 16, 1536 << 16));
 175         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 176
 177         /* Testing rounding errors. */
 178         set_src(&plane_state, 0, 0, 0x40001, 0x40001);
 179         set_crtc(&plane_state, 1022, 766, 4, 4);
 180         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 181                                                   DRM_PLANE_HELPER_NO_SCALING,
 182                                                   0x10001,
 183                                                   true, false);
 184         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 185         FAIL_ON(!plane_state.visible);
 186         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
 187         FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));
 188
 189         set_src(&plane_state, 0x20001, 0x20001, 0x4040001, 0x3040001);
 190         set_crtc(&plane_state, -2, -2, 1028, 772);
 191         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 192                                                   DRM_PLANE_HELPER_NO_SCALING,
 193                                                   0x10001,
 194                                                   false, false);
 195         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 196         FAIL_ON(!plane_state.visible);
 197         FAIL_ON(!check_src_eq(&plane_state, 0x40002, 0x40002, 1024 << 16, 768 << 16));
 198         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 199
 200         set_src(&plane_state, 0, 0, 0x3ffff, 0x3ffff);
 201         set_crtc(&plane_state, 1022, 766, 4, 4);
 202         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 203                                                   0xffff,
 204                                                   DRM_PLANE_HELPER_NO_SCALING,
 205                                                   true, false);
 206         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 207         FAIL_ON(!plane_state.visible);
 208         /* Should not be rounded to 0x20001, which would be upscaling. */
 209         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
 210         FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));
 211
 212         set_src(&plane_state, 0x1ffff, 0x1ffff, 0x403ffff, 0x303ffff);
 213         set_crtc(&plane_state, -2, -2, 1028, 772);
 214         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 215                                                   0xffff,
 216                                                   DRM_PLANE_HELPER_NO_SCALING,
 217                                                   false, false);
 218         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 219         FAIL_ON(!plane_state.visible);
 220         FAIL_ON(!check_src_eq(&plane_state, 0x3fffe, 0x3fffe, 1024 << 16, 768 << 16));
 221         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 222
 223         return 0;
 224 }