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 "virtgpu_drv.h"
  27 #include <drm/drm_plane_helper.h>
  28 #include <drm/drm_atomic_helper.h>
  29
  30 static const uint32_t virtio_gpu_formats[] = {
  31         DRM_FORMAT_XRGB8888,
  32         DRM_FORMAT_ARGB8888,
  33         DRM_FORMAT_BGRX8888,
  34         DRM_FORMAT_BGRA8888,
  35         DRM_FORMAT_RGBX8888,
  36         DRM_FORMAT_RGBA8888,
  37         DRM_FORMAT_XBGR8888,
  38         DRM_FORMAT_ABGR8888,
  39 };
  40
  41 static const uint32_t virtio_gpu_cursor_formats[] = {
  42         DRM_FORMAT_ARGB8888,
  43 };
  44
  45 static void virtio_gpu_plane_destroy(struct drm_plane *plane)
  46 {
  47         kfree(plane);
  48 }
  49
  50 static const struct drm_plane_funcs virtio_gpu_plane_funcs = {
  51         .update_plane           = drm_atomic_helper_update_plane,
  52         .disable_plane          = drm_atomic_helper_disable_plane,
  53         .destroy                = virtio_gpu_plane_destroy,
  54         .reset                  = drm_atomic_helper_plane_reset,
  55         .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
  56         .atomic_destroy_state   = drm_atomic_helper_plane_destroy_state,
  57 };
  58
  59 static int virtio_gpu_plane_atomic_check(struct drm_plane *plane,
  60                                          struct drm_plane_state *state)
  61 {
  62         return 0;
  63 }
  64
  65 static void virtio_gpu_primary_plane_update(struct drm_plane *plane,
  66                                             struct drm_plane_state *old_state)
  67 {
  68         struct drm_device *dev = plane->dev;
  69         struct virtio_gpu_device *vgdev = dev->dev_private;
  70         struct virtio_gpu_output *output = NULL;
  71         struct virtio_gpu_framebuffer *vgfb;
  72         struct virtio_gpu_object *bo;
  73         uint32_t handle;
  74
  75         if (plane->state->crtc)
  76                 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
  77         if (old_state->crtc)
  78                 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
  79         if (WARN_ON(!output))
  80                 return;
  81
  82         if (plane->state->fb) {
  83                 vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
  84                 bo = gem_to_virtio_gpu_obj(vgfb->obj);
  85                 handle = bo->hw_res_handle;
  86                 if (bo->dumb) {
  87                         virtio_gpu_cmd_transfer_to_host_2d
  88                                 (vgdev, handle, 0,
  89                                  cpu_to_le32(plane->state->src_w >> 16),
  90                                  cpu_to_le32(plane->state->src_h >> 16),
  91                                  plane->state->src_x >> 16,
  92                                  plane->state->src_y >> 16, NULL);
  93                 }
  94         } else {
  95                 handle = 0;
  96         }
  97
  98         DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d, src %dx%d+%d+%d\n", handle,
  99                   plane->state->crtc_w, plane->state->crtc_h,
 100                   plane->state->crtc_x, plane->state->crtc_y,
 101                   plane->state->src_w >> 16,
 102                   plane->state->src_h >> 16,
 103                   plane->state->src_x >> 16,
 104                   plane->state->src_y >> 16);
 105         virtio_gpu_cmd_set_scanout(vgdev, output->index, handle,
 106                                    plane->state->src_w >> 16,
 107                                    plane->state->src_h >> 16,
 108                                    plane->state->src_x >> 16,
 109                                    plane->state->src_y >> 16);
 110         virtio_gpu_cmd_resource_flush(vgdev, handle,
 111                                       plane->state->src_x >> 16,
 112                                       plane->state->src_y >> 16,
 113                                       plane->state->src_w >> 16,
 114                                       plane->state->src_h >> 16);
 115 }
 116
 117 static void virtio_gpu_cursor_plane_update(struct drm_plane *plane,
 118                                            struct drm_plane_state *old_state)
 119 {
 120         struct drm_device *dev = plane->dev;
 121         struct virtio_gpu_device *vgdev = dev->dev_private;
 122         struct virtio_gpu_output *output = NULL;
 123         struct virtio_gpu_framebuffer *vgfb;
 124         struct virtio_gpu_fence *fence = NULL;
 125         struct virtio_gpu_object *bo = NULL;
 126         uint32_t handle;
 127         int ret = 0;
 128
 129         if (plane->state->crtc)
 130                 output = drm_crtc_to_virtio_gpu_output(plane->state->crtc);
 131         if (old_state->crtc)
 132                 output = drm_crtc_to_virtio_gpu_output(old_state->crtc);
 133         if (WARN_ON(!output))
 134                 return;
 135
 136         if (plane->state->fb) {
 137                 vgfb = to_virtio_gpu_framebuffer(plane->state->fb);
 138                 bo = gem_to_virtio_gpu_obj(vgfb->obj);
 139                 handle = bo->hw_res_handle;
 140         } else {
 141                 handle = 0;
 142         }
 143
 144         if (bo && bo->dumb && (plane->state->fb != old_state->fb)) {
 145                 /* new cursor -- update & wait */
 146                 virtio_gpu_cmd_transfer_to_host_2d
 147                         (vgdev, handle, 0,
 148                          cpu_to_le32(plane->state->crtc_w),
 149                          cpu_to_le32(plane->state->crtc_h),
 150                          0, 0, &fence);
 151                 ret = virtio_gpu_object_reserve(bo, false);
 152                 if (!ret) {
 153                         reservation_object_add_excl_fence(bo->tbo.resv,
 154                                                           &fence->f);
 155                         fence_put(&fence->f);
 156                         fence = NULL;
 157                         virtio_gpu_object_unreserve(bo);
 158                         virtio_gpu_object_wait(bo, false);
 159                 }
 160         }
 161
 162         if (plane->state->fb != old_state->fb) {
 163                 DRM_DEBUG("update, handle %d, pos +%d+%d, hot %d,%d\n", handle,
 164                           plane->state->crtc_x,
 165                           plane->state->crtc_y,
 166                           plane->state->fb ? plane->state->fb->hot_x : 0,
 167                           plane->state->fb ? plane->state->fb->hot_y : 0);
 168                 output->cursor.hdr.type =
 169                         cpu_to_le32(VIRTIO_GPU_CMD_UPDATE_CURSOR);
 170                 output->cursor.resource_id = cpu_to_le32(handle);
 171                 if (plane->state->fb) {
 172                         output->cursor.hot_x =
 173                                 cpu_to_le32(plane->state->fb->hot_x);
 174                         output->cursor.hot_y =
 175                                 cpu_to_le32(plane->state->fb->hot_y);
 176                 } else {
 177                         output->cursor.hot_x = cpu_to_le32(0);
 178                         output->cursor.hot_y = cpu_to_le32(0);
 179                 }
 180         } else {
 181                 DRM_DEBUG("move +%d+%d\n",
 182                           plane->state->crtc_x,
 183                           plane->state->crtc_y);
 184                 output->cursor.hdr.type =
 185                         cpu_to_le32(VIRTIO_GPU_CMD_MOVE_CURSOR);
 186         }
 187         output->cursor.pos.x = cpu_to_le32(plane->state->crtc_x);
 188         output->cursor.pos.y = cpu_to_le32(plane->state->crtc_y);
 189         virtio_gpu_cursor_ping(vgdev, output);
 190 }
 191
 192 static const struct drm_plane_helper_funcs virtio_gpu_primary_helper_funcs = {
 193         .atomic_check           = virtio_gpu_plane_atomic_check,
 194         .atomic_update          = virtio_gpu_primary_plane_update,
 195 };
 196
 197 static const struct drm_plane_helper_funcs virtio_gpu_cursor_helper_funcs = {
 198         .atomic_check           = virtio_gpu_plane_atomic_check,
 199         .atomic_update          = virtio_gpu_cursor_plane_update,
 200 };
 201
 202 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev,
 203                                         enum drm_plane_type type,
 204                                         int index)
 205 {
 206         struct drm_device *dev = vgdev->ddev;
 207         const struct drm_plane_helper_funcs *funcs;
 208         struct drm_plane *plane;
 209         const uint32_t *formats;
 210         int ret, nformats;
 211
 212         plane = kzalloc(sizeof(*plane), GFP_KERNEL);
 213         if (!plane)
 214                 return ERR_PTR(-ENOMEM);
 215
 216         if (type == DRM_PLANE_TYPE_CURSOR) {
 217                 formats = virtio_gpu_cursor_formats;
 218                 nformats = ARRAY_SIZE(virtio_gpu_cursor_formats);
 219                 funcs = &virtio_gpu_cursor_helper_funcs;
 220         } else {
 221                 formats = virtio_gpu_formats;
 222                 nformats = ARRAY_SIZE(virtio_gpu_formats);
 223                 funcs = &virtio_gpu_primary_helper_funcs;
 224         }
 225         ret = drm_universal_plane_init(dev, plane, 1 << index,
 226                                        &virtio_gpu_plane_funcs,
 227                                        formats, nformats,
 228                                        type, NULL);
 229         if (ret)
 230                 goto err_plane_init;
 231
 232         drm_plane_helper_add(plane, funcs);
 233         return plane;
 234
 235 err_plane_init:
 236         kfree(plane);
 237         return ERR_PTR(ret);
 238 }