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 static 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
  24 static 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
  50 static 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
  60 static 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
  76 int igt_check_plane_state(void *ignored)
  77 {
  78         int ret;
  79
  80         static 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         static struct drm_plane plane = {
  91                 .dev = NULL
  92         };
  93         static struct drm_framebuffer fb = {
  94                 .width = 2048,
  95                 .height = 2048
  96         };
  97         static struct drm_plane_state plane_state = {
  98                 .plane = &plane,
  99                 .crtc = ZERO_SIZE_PTR,
 100                 .fb = &fb,
 101                 .rotation = DRM_MODE_ROTATE_0
 102         };
 103
 104         /* Simple clipping, no scaling. */
 105         set_src(&plane_state, 0, 0, fb.width << 16, fb.height << 16);
 106         set_crtc(&plane_state, 0, 0, fb.width, fb.height);
 107         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 108                                                   DRM_PLANE_HELPER_NO_SCALING,
 109                                                   DRM_PLANE_HELPER_NO_SCALING,
 110                                                   false, false);
 111         FAIL(ret < 0, "Simple clipping check should pass\n");
 112         FAIL_ON(!plane_state.visible);
 113         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1024 << 16, 768 << 16));
 114         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 115
 116         /* Rotated clipping + reflection, no scaling. */
 117         plane_state.rotation = DRM_MODE_ROTATE_90 | DRM_MODE_REFLECT_X;
 118         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 119                                                   DRM_PLANE_HELPER_NO_SCALING,
 120                                                   DRM_PLANE_HELPER_NO_SCALING,
 121                                                   false, false);
 122         FAIL(ret < 0, "Rotated clipping check should pass\n");
 123         FAIL_ON(!plane_state.visible);
 124         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 768 << 16, 1024 << 16));
 125         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 126         plane_state.rotation = DRM_MODE_ROTATE_0;
 127
 128         /* Check whether positioning works correctly. */
 129         set_src(&plane_state, 0, 0, 1023 << 16, 767 << 16);
 130         set_crtc(&plane_state, 0, 0, 1023, 767);
 131         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 132                                                   DRM_PLANE_HELPER_NO_SCALING,
 133                                                   DRM_PLANE_HELPER_NO_SCALING,
 134                                                   false, false);
 135         FAIL(!ret, "Should not be able to position on the crtc with can_position=false\n");
 136
 137         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 138                                                   DRM_PLANE_HELPER_NO_SCALING,
 139                                                   DRM_PLANE_HELPER_NO_SCALING,
 140                                                   true, false);
 141         FAIL(ret < 0, "Simple positioning should work\n");
 142         FAIL_ON(!plane_state.visible);
 143         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 1023 << 16, 767 << 16));
 144         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1023, 767));
 145
 146         /* Simple scaling tests. */
 147         set_src(&plane_state, 0, 0, 512 << 16, 384 << 16);
 148         set_crtc(&plane_state, 0, 0, 1024, 768);
 149         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 150                                                   0x8001,
 151                                                   DRM_PLANE_HELPER_NO_SCALING,
 152                                                   false, false);
 153         FAIL(!ret, "Upscaling out of range should fail.\n");
 154         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 155                                                   0x8000,
 156                                                   DRM_PLANE_HELPER_NO_SCALING,
 157                                                   false, false);
 158         FAIL(ret < 0, "Upscaling exactly 2x should work\n");
 159         FAIL_ON(!plane_state.visible);
 160         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 512 << 16, 384 << 16));
 161         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 162
 163         set_src(&plane_state, 0, 0, 2048 << 16, 1536 << 16);
 164         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 165                                                   DRM_PLANE_HELPER_NO_SCALING,
 166                                                   0x1ffff, false, false);
 167         FAIL(!ret, "Downscaling out of range should fail.\n");
 168         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 169                                                   DRM_PLANE_HELPER_NO_SCALING,
 170                                                   0x20000, false, false);
 171         FAIL(ret < 0, "Should succeed with exact scaling limit\n");
 172         FAIL_ON(!plane_state.visible);
 173         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2048 << 16, 1536 << 16));
 174         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 175
 176         /* Testing rounding errors. */
 177         set_src(&plane_state, 0, 0, 0x40001, 0x40001);
 178         set_crtc(&plane_state, 1022, 766, 4, 4);
 179         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 180                                                   DRM_PLANE_HELPER_NO_SCALING,
 181                                                   0x10001,
 182                                                   true, false);
 183         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 184         FAIL_ON(!plane_state.visible);
 185         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
 186         FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));
 187
 188         set_src(&plane_state, 0x20001, 0x20001, 0x4040001, 0x3040001);
 189         set_crtc(&plane_state, -2, -2, 1028, 772);
 190         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 191                                                   DRM_PLANE_HELPER_NO_SCALING,
 192                                                   0x10001,
 193                                                   false, false);
 194         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 195         FAIL_ON(!plane_state.visible);
 196         FAIL_ON(!check_src_eq(&plane_state, 0x40002, 0x40002, 1024 << 16, 768 << 16));
 197         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 198
 199         set_src(&plane_state, 0, 0, 0x3ffff, 0x3ffff);
 200         set_crtc(&plane_state, 1022, 766, 4, 4);
 201         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 202                                                   0xffff,
 203                                                   DRM_PLANE_HELPER_NO_SCALING,
 204                                                   true, false);
 205         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 206         FAIL_ON(!plane_state.visible);
 207         /* Should not be rounded to 0x20001, which would be upscaling. */
 208         FAIL_ON(!check_src_eq(&plane_state, 0, 0, 2 << 16, 2 << 16));
 209         FAIL_ON(!check_crtc_eq(&plane_state, 1022, 766, 2, 2));
 210
 211         set_src(&plane_state, 0x1ffff, 0x1ffff, 0x403ffff, 0x303ffff);
 212         set_crtc(&plane_state, -2, -2, 1028, 772);
 213         ret = drm_atomic_helper_check_plane_state(&plane_state, &crtc_state,
 214                                                   0xffff,
 215                                                   DRM_PLANE_HELPER_NO_SCALING,
 216                                                   false, false);
 217         FAIL(ret < 0, "Should succeed by clipping to exact multiple");
 218         FAIL_ON(!plane_state.visible);
 219         FAIL_ON(!check_src_eq(&plane_state, 0x3fffe, 0x3fffe, 1024 << 16, 768 << 16));
 220         FAIL_ON(!check_crtc_eq(&plane_state, 0, 0, 1024, 768));
 221
 222         return 0;
 223 }