1 /* $NetBSD: virtgpu_plane.c,v 1.2 2018/08/27 04:58:37 riastradh Exp $ */ 2 3 /* 4 * Copyright (C) 2015 Red Hat, Inc. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining 8 * a copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sublicense, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial 17 * portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 22 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 23 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 */ 27 28 #include <sys/cdefs.h> 29 __KERNEL_RCSID(0, "$NetBSD: virtgpu_plane.c,v 1.2 2018/08/27 04:58:37 riastradh Exp $"); 30 31 #include "virtgpu_drv.h" 32 #include <drm/drm_plane_helper.h> 33 #include <drm/drm_atomic_helper.h> 34 35 static const uint32_t virtio_gpu_formats[] = { 36 DRM_FORMAT_XRGB8888, 37 DRM_FORMAT_ARGB8888, 38 DRM_FORMAT_BGRX8888, 39 DRM_FORMAT_BGRA8888, 40 DRM_FORMAT_RGBX8888, 41 DRM_FORMAT_RGBA8888, 42 DRM_FORMAT_XBGR8888, 43 DRM_FORMAT_ABGR8888, 44 }; 45 46 static void virtio_gpu_plane_destroy(struct drm_plane *plane) 47 { 48 kfree(plane); 49 } 50 51 static const struct drm_plane_funcs virtio_gpu_plane_funcs = { 52 .update_plane = drm_atomic_helper_update_plane, 53 .disable_plane = drm_atomic_helper_disable_plane, 54 .destroy = virtio_gpu_plane_destroy, 55 .reset = drm_atomic_helper_plane_reset, 56 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, 57 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, 58 }; 59 60 static int virtio_gpu_plane_atomic_check(struct drm_plane *plane, 61 struct drm_plane_state *state) 62 { 63 return 0; 64 } 65 66 static void virtio_gpu_plane_atomic_update(struct drm_plane *plane, 67 struct drm_plane_state *old_state) 68 { 69 struct drm_device *dev = plane->dev; 70 struct virtio_gpu_device *vgdev = dev->dev_private; 71 struct virtio_gpu_output *output = drm_crtc_to_virtio_gpu_output(plane->crtc); 72 struct virtio_gpu_framebuffer *vgfb; 73 struct virtio_gpu_object *bo; 74 uint32_t handle; 75 76 if (plane->fb) { 77 vgfb = to_virtio_gpu_framebuffer(plane->fb); 78 bo = gem_to_virtio_gpu_obj(vgfb->obj); 79 handle = bo->hw_res_handle; 80 } else { 81 handle = 0; 82 } 83 84 DRM_DEBUG("handle 0x%x, crtc %dx%d+%d+%d\n", handle, 85 plane->state->crtc_w, plane->state->crtc_h, 86 plane->state->crtc_x, plane->state->crtc_y); 87 virtio_gpu_cmd_set_scanout(vgdev, output->index, handle, 88 plane->state->crtc_w, 89 plane->state->crtc_h, 90 plane->state->crtc_x, 91 plane->state->crtc_y); 92 } 93 94 95 static const struct drm_plane_helper_funcs virtio_gpu_plane_helper_funcs = { 96 .atomic_check = virtio_gpu_plane_atomic_check, 97 .atomic_update = virtio_gpu_plane_atomic_update, 98 }; 99 100 struct drm_plane *virtio_gpu_plane_init(struct virtio_gpu_device *vgdev, 101 int index) 102 { 103 struct drm_device *dev = vgdev->ddev; 104 struct drm_plane *plane; 105 int ret; 106 107 plane = kzalloc(sizeof(*plane), GFP_KERNEL); 108 if (!plane) 109 return ERR_PTR(-ENOMEM); 110 111 ret = drm_universal_plane_init(dev, plane, 1 << index, 112 &virtio_gpu_plane_funcs, 113 virtio_gpu_formats, 114 ARRAY_SIZE(virtio_gpu_formats), 115 DRM_PLANE_TYPE_PRIMARY); 116 if (ret) 117 goto err_plane_init; 118 119 drm_plane_helper_add(plane, &virtio_gpu_plane_helper_funcs); 120 return plane; 121 122 err_plane_init: 123 kfree(plane); 124 return ERR_PTR(ret); 125 } 126