1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (c) 2015 MediaTek Inc. 4 * Author: CK Hu <ck.hu@mediatek.com> 5 */ 6 7 #include <drm/drm_atomic.h> 8 #include <drm/drm_atomic_helper.h> 9 #include <drm/drm_atomic_uapi.h> 10 #include <drm/drm_fourcc.h> 11 #include <drm/drm_gem_atomic_helper.h> 12 #include <drm/drm_plane_helper.h> 13 14 #include "mtk_drm_crtc.h" 15 #include "mtk_drm_ddp_comp.h" 16 #include "mtk_drm_drv.h" 17 #include "mtk_drm_gem.h" 18 #include "mtk_drm_plane.h" 19 20 static const u32 formats[] = { 21 DRM_FORMAT_XRGB8888, 22 DRM_FORMAT_ARGB8888, 23 DRM_FORMAT_BGRX8888, 24 DRM_FORMAT_BGRA8888, 25 DRM_FORMAT_ABGR8888, 26 DRM_FORMAT_XBGR8888, 27 DRM_FORMAT_RGB888, 28 DRM_FORMAT_BGR888, 29 DRM_FORMAT_RGB565, 30 DRM_FORMAT_UYVY, 31 DRM_FORMAT_YUYV, 32 }; 33 34 static void mtk_plane_reset(struct drm_plane *plane) 35 { 36 struct mtk_plane_state *state; 37 38 if (plane->state) { 39 __drm_atomic_helper_plane_destroy_state(plane->state); 40 41 state = to_mtk_plane_state(plane->state); 42 memset(state, 0, sizeof(*state)); 43 } else { 44 state = kzalloc(sizeof(*state), GFP_KERNEL); 45 if (!state) 46 return; 47 plane->state = &state->base; 48 } 49 50 state->base.plane = plane; 51 state->pending.format = DRM_FORMAT_RGB565; 52 } 53 54 static struct drm_plane_state *mtk_plane_duplicate_state(struct drm_plane *plane) 55 { 56 struct mtk_plane_state *old_state = to_mtk_plane_state(plane->state); 57 struct mtk_plane_state *state; 58 59 state = kzalloc(sizeof(*state), GFP_KERNEL); 60 if (!state) 61 return NULL; 62 63 __drm_atomic_helper_plane_duplicate_state(plane, &state->base); 64 65 WARN_ON(state->base.plane != plane); 66 67 state->pending = old_state->pending; 68 69 return &state->base; 70 } 71 72 static void mtk_drm_plane_destroy_state(struct drm_plane *plane, 73 struct drm_plane_state *state) 74 { 75 __drm_atomic_helper_plane_destroy_state(state); 76 kfree(to_mtk_plane_state(state)); 77 } 78 79 static int mtk_plane_atomic_async_check(struct drm_plane *plane, 80 struct drm_atomic_state *state) 81 { 82 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, 83 plane); 84 struct drm_crtc_state *crtc_state; 85 int ret; 86 87 if (plane != new_plane_state->crtc->cursor) 88 return -EINVAL; 89 90 if (!plane->state) 91 return -EINVAL; 92 93 if (!plane->state->fb) 94 return -EINVAL; 95 96 ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane, 97 to_mtk_plane_state(new_plane_state)); 98 if (ret) 99 return ret; 100 101 if (state) 102 crtc_state = drm_atomic_get_existing_crtc_state(state, 103 new_plane_state->crtc); 104 else /* Special case for asynchronous cursor updates. */ 105 crtc_state = new_plane_state->crtc->state; 106 107 return drm_atomic_helper_check_plane_state(plane->state, crtc_state, 108 DRM_PLANE_HELPER_NO_SCALING, 109 DRM_PLANE_HELPER_NO_SCALING, 110 true, true); 111 } 112 113 static void mtk_plane_update_new_state(struct drm_plane_state *new_state, 114 struct mtk_plane_state *mtk_plane_state) 115 { 116 struct drm_framebuffer *fb = new_state->fb; 117 struct drm_gem_object *gem; 118 struct mtk_drm_gem_obj *mtk_gem; 119 unsigned int pitch, format; 120 dma_addr_t addr; 121 122 gem = fb->obj[0]; 123 mtk_gem = to_mtk_gem_obj(gem); 124 addr = mtk_gem->dma_addr; 125 pitch = fb->pitches[0]; 126 format = fb->format->format; 127 128 addr += (new_state->src.x1 >> 16) * fb->format->cpp[0]; 129 addr += (new_state->src.y1 >> 16) * pitch; 130 131 mtk_plane_state->pending.enable = true; 132 mtk_plane_state->pending.pitch = pitch; 133 mtk_plane_state->pending.format = format; 134 mtk_plane_state->pending.addr = addr; 135 mtk_plane_state->pending.x = new_state->dst.x1; 136 mtk_plane_state->pending.y = new_state->dst.y1; 137 mtk_plane_state->pending.width = drm_rect_width(&new_state->dst); 138 mtk_plane_state->pending.height = drm_rect_height(&new_state->dst); 139 mtk_plane_state->pending.rotation = new_state->rotation; 140 } 141 142 static void mtk_plane_atomic_async_update(struct drm_plane *plane, 143 struct drm_atomic_state *state) 144 { 145 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 146 plane); 147 struct mtk_plane_state *new_plane_state = to_mtk_plane_state(plane->state); 148 149 plane->state->crtc_x = new_state->crtc_x; 150 plane->state->crtc_y = new_state->crtc_y; 151 plane->state->crtc_h = new_state->crtc_h; 152 plane->state->crtc_w = new_state->crtc_w; 153 plane->state->src_x = new_state->src_x; 154 plane->state->src_y = new_state->src_y; 155 plane->state->src_h = new_state->src_h; 156 plane->state->src_w = new_state->src_w; 157 swap(plane->state->fb, new_state->fb); 158 159 mtk_plane_update_new_state(new_state, new_plane_state); 160 wmb(); /* Make sure the above parameters are set before update */ 161 new_plane_state->pending.async_dirty = true; 162 mtk_drm_crtc_async_update(new_state->crtc, plane, state); 163 } 164 165 static const struct drm_plane_funcs mtk_plane_funcs = { 166 .update_plane = drm_atomic_helper_update_plane, 167 .disable_plane = drm_atomic_helper_disable_plane, 168 .destroy = drm_plane_cleanup, 169 .reset = mtk_plane_reset, 170 .atomic_duplicate_state = mtk_plane_duplicate_state, 171 .atomic_destroy_state = mtk_drm_plane_destroy_state, 172 }; 173 174 static int mtk_plane_atomic_check(struct drm_plane *plane, 175 struct drm_atomic_state *state) 176 { 177 struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, 178 plane); 179 struct drm_framebuffer *fb = new_plane_state->fb; 180 struct drm_crtc_state *crtc_state; 181 int ret; 182 183 if (!fb) 184 return 0; 185 186 if (WARN_ON(!new_plane_state->crtc)) 187 return 0; 188 189 ret = mtk_drm_crtc_plane_check(new_plane_state->crtc, plane, 190 to_mtk_plane_state(new_plane_state)); 191 if (ret) 192 return ret; 193 194 crtc_state = drm_atomic_get_crtc_state(state, 195 new_plane_state->crtc); 196 if (IS_ERR(crtc_state)) 197 return PTR_ERR(crtc_state); 198 199 return drm_atomic_helper_check_plane_state(new_plane_state, 200 crtc_state, 201 DRM_PLANE_HELPER_NO_SCALING, 202 DRM_PLANE_HELPER_NO_SCALING, 203 true, true); 204 } 205 206 static void mtk_plane_atomic_disable(struct drm_plane *plane, 207 struct drm_atomic_state *state) 208 { 209 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 210 plane); 211 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state); 212 mtk_plane_state->pending.enable = false; 213 wmb(); /* Make sure the above parameter is set before update */ 214 mtk_plane_state->pending.dirty = true; 215 } 216 217 static void mtk_plane_atomic_update(struct drm_plane *plane, 218 struct drm_atomic_state *state) 219 { 220 struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, 221 plane); 222 struct mtk_plane_state *mtk_plane_state = to_mtk_plane_state(new_state); 223 224 if (!new_state->crtc || WARN_ON(!new_state->fb)) 225 return; 226 227 if (!new_state->visible) { 228 mtk_plane_atomic_disable(plane, state); 229 return; 230 } 231 232 mtk_plane_update_new_state(new_state, mtk_plane_state); 233 wmb(); /* Make sure the above parameters are set before update */ 234 mtk_plane_state->pending.dirty = true; 235 } 236 237 static const struct drm_plane_helper_funcs mtk_plane_helper_funcs = { 238 .atomic_check = mtk_plane_atomic_check, 239 .atomic_update = mtk_plane_atomic_update, 240 .atomic_disable = mtk_plane_atomic_disable, 241 .atomic_async_update = mtk_plane_atomic_async_update, 242 .atomic_async_check = mtk_plane_atomic_async_check, 243 }; 244 245 int mtk_plane_init(struct drm_device *dev, struct drm_plane *plane, 246 unsigned long possible_crtcs, enum drm_plane_type type, 247 unsigned int supported_rotations) 248 { 249 int err; 250 251 err = drm_universal_plane_init(dev, plane, possible_crtcs, 252 &mtk_plane_funcs, formats, 253 ARRAY_SIZE(formats), NULL, type, NULL); 254 if (err) { 255 DRM_ERROR("failed to initialize plane\n"); 256 return err; 257 } 258 259 if (supported_rotations & ~DRM_MODE_ROTATE_0) { 260 err = drm_plane_create_rotation_property(plane, 261 DRM_MODE_ROTATE_0, 262 supported_rotations); 263 if (err) 264 DRM_INFO("Create rotation property failed\n"); 265 } 266 267 drm_plane_helper_add(plane, &mtk_plane_helper_funcs); 268 269 return 0; 270 } 271