drivers/gpu/drm/virtio/virtgpu_plane.c

   1 /*
   2  * Copyright (C) 2015 Red Hat, Inc.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  */
  25
  26 #include <drm/drm_atomic_helper.h>
  27 #include <drm/drm_fourcc.h>
  28 #include <drm/drm_plane_helper.h>
  29
  30 #include "virtgpu_drv.h"
  31
  32 static const uint32_t virtio_gpu_formats[] = {
  33         DRM_FORMAT_HOST_XRGB8888,
  34 };
  35
  36 static const uint32_t virtio_gpu_cursor_formats[] = {
  37         DRM_FORMAT_HOST_ARGB8888,
  38 };
  39
  40 uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc)
  41 {
  42         uint32_t format;
  43
  44         switch (drm_fourcc) {
  45         case DRM_FORMAT_XRGB8888:
  46                 format = VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM;
  47                 break;
  48         case DRM_FORMAT_ARGB8888:
  49                 format = VIRTIO_GPU_FORMAT_B8G8R8A8_UNORM;
  50                 break;
  51         case DRM_FORMAT_BGRX8888:
  52                 format = VIRTIO_GPU_FORMAT_X8R8G8B8_UNORM;
  53                 break;
  54         case DRM_FORMAT_BGRA8888:
  55                 format = VIRTIO_GPU_FORMAT_A8R8G8B8_UNORM;
  56                 break;
  57         default:
  58                 /*
  59                  * This should not happen, we handle everything listed
  60                  * in virtio_gpu_formats[].
  61                  */
  62                 format = 0;
  63                 break;
  64         }
  65         WARN_ON(format == 0);
  66         return format;
  67 }
  68
  69 static void virtio_gpu_plane_destroy(struct drm_plane *plane)
  70 {
  71         drm_plane_cleanup(plane);
  72         kfree(plane);
  73 }
  74
  75 static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
  76         .update_plane           = drm_atomic_helper_update_plane,
  77         .disable_plane          = drm_atomic_helper_disable_plane,
  78         .destroy                = virtio_gpu_plane_destroy,
  79         .reset                  = drm_atomic_helper_plane_reset,
  80         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
  81         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
  82 };
  83
  84 static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
  85                                          struct drm_plane_state *state)
  86 {
  87         return 0;
  88 }
  89
  90 static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
  91                                             struct drm_plane_state *old_state)
  92 {
  93         struct drm_device *dev = plane->dev;
  94         struct virtio_gpu_device *vgdev = dev->dev_private;
  95         struct virtio_gpu_output *output = NULL;
  96         struct virtio_gpu_framebuffer *vgfb;
  97         struct virtio_gpu_object *bo;
  98         uint32_t handle;
  99
 100         if (plane->state->crtc)
 101                 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
 102         if (old_state->crtc)
 103                 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
 104         if (WARN_ON(!output))
 105                 return;
 106
 107         if (plane->state->fb && output->enabled) {
 108                 vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 109                 bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
 110                 handle = bo->hw_res_handle;
 111                 if (bo->dumb) {
 112                         virtio_gpu_cmd_transfer_to_host_2d
 113                                 (vgdev, bo, 0,
 114                                  cpu_to_le32(plane->state->src_w >> 16),
 115                                  cpu_to_le32(plane->state->src_h >> 16),
 116                                  cpu_to_le32(plane->state->src_x >> 16),
 117                                  cpu_to_le32(plane->state->src_y >> 16), NULL);
 118                 }
 119         } else {
 120                 handle = 0;
 121         }
 122
 123         DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n", handle,
 124                   plane->state->crtc_w, plane->state->crtc_h,
 125                   plane->state->crtc_x, plane->state->crtc_y,
 126                   plane->state->src_w >> 16,
 127                   plane->state->src_h >> 16,
 128                   plane->state->src_x >> 16,
 129                   plane->state->src_y >> 16);
 130         virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
 131                                    plane->state->src_w >> 16,
 132                                    plane->state->src_h >> 16,
 133                                    plane->state->src_x >> 16,
 134                                    plane->state->src_y >> 16);
 135         if (handle)
 136                 virtio_gpu_cmd_resource_flush(vgdev, handle,
 137                                               plane->state->src_x >> 16,
 138                                               plane->state->src_y >> 16,
 139                                               plane->state->src_w >> 16,
 140                                               plane->state->src_h >> 16);
 141 }
 142
 143 static int virtio_gpu_cursor_prepare_fb(struct drm_plane *plane,
 144                                         struct drm_plane_state *new_state)
 145 {
 146         struct drm_device *dev = plane->dev;
 147         struct virtio_gpu_device *vgdev = dev->dev_private;
 148         struct virtio_gpu_framebuffer *vgfb;
 149         struct virtio_gpu_object *bo;
 150
 151         if (!new_state->fb)
 152                 return 0;
 153
 154         vgfb = to_virtio_gpu_framebuffer(new_state->fb);
 155         bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
 156         if (bo && bo->dumb && (plane->state->fb != new_state->fb)) {
 157                 vgfb->fence = virtio_gpu_fence_alloc(vgdev);
 158                 if (!vgfb->fence)
 159                         return -ENOMEM;
 160         }
 161
 162         return 0;
 163 }
 164
 165 static void virtio_gpu_cursor_cleanup_fb(struct drm_plane *plane,
 166                                          struct drm_plane_state *old_state)
 167 {
 168         struct virtio_gpu_framebuffer *vgfb;
 169
 170         if (!plane->state->fb)
 171                 return;
 172
 173         vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 174         if (vgfb->fence) {
 175                 dma_fence_put(&vgfb->fence->f);
 176                 vgfb->fence = NULL;
 177         }
 178 }
 179
 180 static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
 181                                            struct drm_plane_state *old_state)
 182 {
 183         struct drm_device *dev = plane->dev;
 184         struct virtio_gpu_device *vgdev = dev->dev_private;
 185         struct virtio_gpu_output *output = NULL;
 186         struct virtio_gpu_framebuffer *vgfb;
 187         struct virtio_gpu_object *bo = NULL;
 188         uint32_t handle;
 189         int ret = 0;
 190
 191         if (plane->state->crtc)
 192                 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
 193         if (old_state->crtc)
 194                 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
 195         if (WARN_ON(!output))
 196                 return;
 197
 198         if (plane->state->fb) {
 199                 vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 200                 bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]);
 201                 handle = bo->hw_res_handle;
 202         } else {
 203                 handle = 0;
 204         }
 205
 206         if (bo && bo->dumb && (plane->state->fb != old_state->fb)) {
 207                 /* new cursor -- update & wait */
 208                 virtio_gpu_cmd_transfer_to_host_2d
 209                         (vgdev, bo, 0,
 210                          cpu_to_le32(plane->state->crtc_w),
 211                          cpu_to_le32(plane->state->crtc_h),
 212                          0, 0, vgfb->fence);
 213                 ret = virtio_gpu_object_reserve(bo, false);
 214                 if (!ret) {
 215                         dma_resv_add_excl_fence(bo->tbo.base.resv,
 216                                                           &vgfb->fence->f);
 217                         dma_fence_put(&vgfb->fence->f);
 218                         vgfb->fence = NULL;
 219                         virtio_gpu_object_unreserve(bo);
 220                         virtio_gpu_object_wait(bo, false);
 221                 }
 222         }
 223
 224         if (plane->state->fb != old_state->fb) {
 225                 DRM_DEBUG("update, handle %d, pos +%d+%d, hot %d,%d\n", handle,
 226                           plane->state->crtc_x,
 227                           plane->state->crtc_y,
 228                           plane->state->fb ? plane->state->fb->hot_x : 0,
 229                           plane->state->fb ? plane->state->fb->hot_y : 0);
 230                 output->cursor.hdr.type =
 231                         cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
 232                 output->cursor.resource_id = cpu_to_le32(handle);
 233                 if (plane->state->fb) {
 234                         output->cursor.hot_x =
 235                                 cpu_to_le32(plane->state->fb->hot_x);
 236                         output->cursor.hot_y =
 237                                 cpu_to_le32(plane->state->fb->hot_y);
 238                 } else {
 239                         output->cursor.hot_x = cpu_to_le32(0);
 240                         output->cursor.hot_y = cpu_to_le32(0);
 241                 }
 242         } else {
 243                 DRM_DEBUG("move +%d+%d\n",
 244                           plane->state->crtc_x,
 245                           plane->state->crtc_y);
 246                 output->cursor.hdr.type =
 247                         cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
 248         }
 249         output->cursor.pos.x = cpu_to_le32(plane->state->crtc_x);
 250         output->cursor.pos.y = cpu_to_le32(plane->state->crtc_y);
 251         virtio_gpu_cursor_ping(vgdev, output);
 252 }
 253
 254 static const struct drm_plane_helper_funcs virtio_gpu_primary_helper_funcs = {
 255         .atomic_check           = virtio_gpu_plane_atomic_check,
 256         .atomic_update          = virtio_gpu_primary_plane_update,
 257 };
 258
 259 static const struct drm_plane_helper_funcs virtio_gpu_cursor_helper_funcs = {
 260         .prepare_fb             = virtio_gpu_cursor_prepare_fb,
 261         .cleanup_fb             = virtio_gpu_cursor_cleanup_fb,
 262         .atomic_check           = virtio_gpu_plane_atomic_check,
 263         .atomic_update          = virtio_gpu_cursor_plane_update,
 264 };
 265
 266 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
 267                                         enum drm_plane_type type,
 268                                         int index)
 269 {
 270         struct drm_device *dev = vgdev->ddev;
 271         const struct drm_plane_helper_funcs *funcs;
 272         struct drm_plane *plane;
 273         const uint32_t *formats;
 274         int ret, nformats;
 275
 276         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 277         if (!plane)
 278                 return ERR_PTR(-ENOMEM);
 279
 280         if (type == DRM_PLANE_TYPE_CURSOR) {
 281                 formats = virtio_gpu_cursor_formats;
 282                 nformats = ARRAY_SIZE(virtio_gpu_cursor_formats);
 283                 funcs = &virtio_gpu_cursor_helper_funcs;
 284         } else {
 285                 formats = virtio_gpu_formats;
 286                 nformats = ARRAY_SIZE(virtio_gpu_formats);
 287                 funcs = &virtio_gpu_primary_helper_funcs;
 288         }
 289         ret = drm_universal_plane_init(dev, plane, 1 << index,
 290                                        &virtio_gpu_plane_funcs,
 291                                        formats, nformats,
 292                                        NULL, type, NULL);
 293         if (ret)
 294                 goto err_plane_init;
 295
 296         drm_plane_helper_add(plane, funcs);
 297         return plane;
 298
 299 err_plane_init:
 300         kfree(plane);
 301         return ERR_PTR(ret);
 302 }