1 // SPDX-License-Identifier: GPL-2.0+ 2 3 #include <linux/iosys-map.h> 4 5 #include <drm/drm_atomic.h> 6 #include <drm/drm_atomic_helper.h> 7 #include <drm/drm_blend.h> 8 #include <drm/drm_fourcc.h> 9 #include <drm/drm_gem_atomic_helper.h> 10 #include <drm/drm_gem_framebuffer_helper.h> 11 12 #include "vkms_drv.h" 13 #include "vkms_formats.h" 14 15 static const u32 vkms_formats[] = { 16 DRM_FORMAT_ARGB8888, 17 DRM_FORMAT_XRGB8888, 18 DRM_FORMAT_XRGB16161616, 19 DRM_FORMAT_ARGB16161616, 20 DRM_FORMAT_RGB565 21 }; 22 23 static struct drm_plane_state * 24 vkms_plane_duplicate_state(struct drm_plane *plane) 25 { 26 struct vkms_plane_state *vkms_state; 27 struct vkms_frame_info *frame_info; 28 29 vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL); 30 if (!vkms_state) 31 return NULL; 32 33 frame_info = kzalloc(sizeof(*frame_info), GFP_KERNEL); 34 if (!frame_info) { 35 DRM_DEBUG_KMS("Couldn't allocate frame_info\n"); 36 kfree(vkms_state); 37 return NULL; 38 } 39 40 vkms_state->frame_info = frame_info; 41 42 __drm_gem_duplicate_shadow_plane_state(plane, &vkms_state->base); 43 44 return &vkms_state->base.base; 45 } 46 47 static void vkms_plane_destroy_state(struct drm_plane *plane, 48 struct drm_plane_state *old_state) 49 { 50 struct vkms_plane_state *vkms_state = to_vkms_plane_state(old_state); 51 struct drm_crtc *crtc = vkms_state->base.base.crtc; 52 53 if (crtc && vkms_state->frame_info->fb) { 54 /* dropping the reference we acquired in 55 * vkms_primary_plane_update() 56 */ 57 if (drm_framebuffer_read_refcount(vkms_state->frame_info->fb)) 58 drm_framebuffer_put(vkms_state->frame_info->fb); 59 } 60 61 kfree(vkms_state->frame_info); 62 vkms_state->frame_info = NULL; 63 64 __drm_gem_destroy_shadow_plane_state(&vkms_state->base); 65 kfree(vkms_state); 66 } 67 68 static void vkms_plane_reset(struct drm_plane *plane) 69 { 70 struct vkms_plane_state *vkms_state; 71 72 if (plane->state) { 73 vkms_plane_destroy_state(plane, plane->state); 74 plane->state = NULL; /* must be set to NULL here */ 75 } 76 77 vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL); 78 if (!vkms_state) { 79 DRM_ERROR("Cannot allocate vkms_plane_state\n"); 80 return; 81 } 82 83 __drm_gem_reset_shadow_plane(plane, &vkms_state->base); 84 } 85 86 static const struct drm_plane_funcs vkms_plane_funcs = { 87 .update_plane = drm_atomic_helper_update_plane, 88 .disable_plane = drm_atomic_helper_disable_plane, 89 .reset = vkms_plane_reset, 90 .atomic_duplicate_state = vkms_plane_duplicate_state, 91 .atomic_destroy_state = vkms_plane_destroy_state, 92 }; 93 94 static void vkms_plane_atomic_update(struct drm_plane *plane, 95 struct drm_atomic_state *state) 96 { 97 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 98 plane); 99 struct vkms_plane_state *vkms_plane_state; 100 struct drm_shadow_plane_state *shadow_plane_state; 101 struct drm_framebuffer *fb = new_state->fb; 102 struct vkms_frame_info *frame_info; 103 u32 fmt; 104 105 if (!new_state->crtc || !fb) 106 return; 107 108 fmt = fb->format->format; 109 vkms_plane_state = to_vkms_plane_state(new_state); 110 shadow_plane_state = &vkms_plane_state->base; 111 112 frame_info = vkms_plane_state->frame_info; 113 memcpy(&frame_info->src, &new_state->src, sizeof(struct drm_rect)); 114 memcpy(&frame_info->dst, &new_state->dst, sizeof(struct drm_rect)); 115 memcpy(&frame_info->rotated, &new_state->dst, sizeof(struct drm_rect)); 116 frame_info->fb = fb; 117 memcpy(&frame_info->map, &shadow_plane_state->data, sizeof(frame_info->map)); 118 drm_framebuffer_get(frame_info->fb); 119 frame_info->rotation = drm_rotation_simplify(new_state->rotation, DRM_MODE_ROTATE_0 | 120 DRM_MODE_ROTATE_90 | 121 DRM_MODE_ROTATE_270 | 122 DRM_MODE_REFLECT_X | 123 DRM_MODE_REFLECT_Y); 124 125 drm_rect_rotate(&frame_info->rotated, drm_rect_width(&frame_info->rotated), 126 drm_rect_height(&frame_info->rotated), frame_info->rotation); 127 128 frame_info->offset = fb->offsets[0]; 129 frame_info->pitch = fb->pitches[0]; 130 frame_info->cpp = fb->format->cpp[0]; 131 vkms_plane_state->pixel_read = get_pixel_conversion_function(fmt); 132 } 133 134 static int vkms_plane_atomic_check(struct drm_plane *plane, 135 struct drm_atomic_state *state) 136 { 137 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, 138 plane); 139 struct drm_crtc_state *crtc_state; 140 int ret; 141 142 if (!new_plane_state->fb || WARN_ON(!new_plane_state->crtc)) 143 return 0; 144 145 crtc_state = drm_atomic_get_crtc_state(state, 146 new_plane_state->crtc); 147 if (IS_ERR(crtc_state)) 148 return PTR_ERR(crtc_state); 149 150 ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state, 151 DRM_PLANE_NO_SCALING, 152 DRM_PLANE_NO_SCALING, 153 true, true); 154 if (ret != 0) 155 return ret; 156 157 return 0; 158 } 159 160 static int vkms_prepare_fb(struct drm_plane *plane, 161 struct drm_plane_state *state) 162 { 163 struct drm_shadow_plane_state *shadow_plane_state; 164 struct drm_framebuffer *fb = state->fb; 165 int ret; 166 167 if (!fb) 168 return 0; 169 170 shadow_plane_state = to_drm_shadow_plane_state(state); 171 172 ret = drm_gem_plane_helper_prepare_fb(plane, state); 173 if (ret) 174 return ret; 175 176 return drm_gem_fb_vmap(fb, shadow_plane_state->map, shadow_plane_state->data); 177 } 178 179 static void vkms_cleanup_fb(struct drm_plane *plane, 180 struct drm_plane_state *state) 181 { 182 struct drm_shadow_plane_state *shadow_plane_state; 183 struct drm_framebuffer *fb = state->fb; 184 185 if (!fb) 186 return; 187 188 shadow_plane_state = to_drm_shadow_plane_state(state); 189 190 drm_gem_fb_vunmap(fb, shadow_plane_state->map); 191 } 192 193 static const struct drm_plane_helper_funcs vkms_plane_helper_funcs = { 194 .atomic_update = vkms_plane_atomic_update, 195 .atomic_check = vkms_plane_atomic_check, 196 .prepare_fb = vkms_prepare_fb, 197 .cleanup_fb = vkms_cleanup_fb, 198 }; 199 200 struct vkms_plane *vkms_plane_init(struct vkms_device *vkmsdev, 201 enum drm_plane_type type, int index) 202 { 203 struct drm_device *dev = &vkmsdev->drm; 204 struct vkms_plane *plane; 205 206 plane = drmm_universal_plane_alloc(dev, struct vkms_plane, base, 1 << index, 207 &vkms_plane_funcs, 208 vkms_formats, ARRAY_SIZE(vkms_formats), 209 NULL, type, NULL); 210 if (IS_ERR(plane)) 211 return plane; 212 213 drm_plane_helper_add(&plane->base, &vkms_plane_helper_funcs); 214 215 drm_plane_create_rotation_property(&plane->base, DRM_MODE_ROTATE_0, 216 DRM_MODE_ROTATE_MASK | DRM_MODE_REFLECT_MASK); 217 218 return plane; 219 } 220