1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * camss-vfe-170.c 4 * 5 * Qualcomm MSM Camera Subsystem - VFE (Video Front End) Module v170 6 * 7 * Copyright (C) 2020-2021 Linaro Ltd. 8 */ 9 10 #include <linux/delay.h> 11 #include <linux/interrupt.h> 12 #include <linux/io.h> 13 #include <linux/iopoll.h> 14 15 #include "camss.h" 16 #include "camss-vfe.h" 17 18 #define VFE_HW_VERSION (0x000) 19 20 #define VFE_GLOBAL_RESET_CMD (0x018) 21 #define GLOBAL_RESET_CMD_CORE BIT(0) 22 #define GLOBAL_RESET_CMD_CAMIF BIT(1) 23 #define GLOBAL_RESET_CMD_BUS BIT(2) 24 #define GLOBAL_RESET_CMD_BUS_BDG BIT(3) 25 #define GLOBAL_RESET_CMD_REGISTER BIT(4) 26 #define GLOBAL_RESET_CMD_PM BIT(5) 27 #define GLOBAL_RESET_CMD_BUS_MISR BIT(6) 28 #define GLOBAL_RESET_CMD_TESTGEN BIT(7) 29 #define GLOBAL_RESET_CMD_DSP BIT(8) 30 #define GLOBAL_RESET_CMD_IDLE_CGC BIT(9) 31 #define GLOBAL_RESET_CMD_RDI0 BIT(10) 32 #define GLOBAL_RESET_CMD_RDI1 BIT(11) 33 #define GLOBAL_RESET_CMD_RDI2 BIT(12) 34 #define GLOBAL_RESET_CMD_RDI3 BIT(13) 35 #define GLOBAL_RESET_CMD_VFE_DOMAIN BIT(30) 36 #define GLOBAL_RESET_CMD_RESET_BYPASS BIT(31) 37 38 #define VFE_CORE_CFG (0x050) 39 #define CFG_PIXEL_PATTERN_YCBYCR (0x4) 40 #define CFG_PIXEL_PATTERN_YCRYCB (0x5) 41 #define CFG_PIXEL_PATTERN_CBYCRY (0x6) 42 #define CFG_PIXEL_PATTERN_CRYCBY (0x7) 43 #define CFG_COMPOSITE_REG_UPDATE_EN BIT(4) 44 45 #define VFE_IRQ_CMD (0x058) 46 #define CMD_GLOBAL_CLEAR BIT(0) 47 48 #define VFE_IRQ_MASK_0 (0x05c) 49 #define MASK_0_CAMIF_SOF BIT(0) 50 #define MASK_0_CAMIF_EOF BIT(1) 51 #define MASK_0_RDI_REG_UPDATE(n) BIT((n) + 5) 52 #define MASK_0_IMAGE_MASTER_n_PING_PONG(n) BIT((n) + 8) 53 #define MASK_0_IMAGE_COMPOSITE_DONE_n(n) BIT((n) + 25) 54 #define MASK_0_RESET_ACK BIT(31) 55 56 #define VFE_IRQ_MASK_1 (0x060) 57 #define MASK_1_CAMIF_ERROR BIT(0) 58 #define MASK_1_VIOLATION BIT(7) 59 #define MASK_1_BUS_BDG_HALT_ACK BIT(8) 60 #define MASK_1_IMAGE_MASTER_n_BUS_OVERFLOW(n) BIT((n) + 9) 61 #define MASK_1_RDI_SOF(n) BIT((n) + 29) 62 63 #define VFE_IRQ_CLEAR_0 (0x064) 64 #define VFE_IRQ_CLEAR_1 (0x068) 65 66 #define VFE_IRQ_STATUS_0 (0x06c) 67 #define STATUS_0_CAMIF_SOF BIT(0) 68 #define STATUS_0_RDI_REG_UPDATE(n) BIT((n) + 5) 69 #define STATUS_0_IMAGE_MASTER_PING_PONG(n) BIT((n) + 8) 70 #define STATUS_0_IMAGE_COMPOSITE_DONE(n) BIT((n) + 25) 71 #define STATUS_0_RESET_ACK BIT(31) 72 73 #define VFE_IRQ_STATUS_1 (0x070) 74 #define STATUS_1_VIOLATION BIT(7) 75 #define STATUS_1_BUS_BDG_HALT_ACK BIT(8) 76 #define STATUS_1_RDI_SOF(n) BIT((n) + 27) 77 78 #define VFE_VIOLATION_STATUS (0x07c) 79 80 #define VFE_CAMIF_CMD (0x478) 81 #define CMD_CLEAR_CAMIF_STATUS BIT(2) 82 83 #define VFE_CAMIF_CFG (0x47c) 84 #define CFG_VSYNC_SYNC_EDGE (0) 85 #define VSYNC_ACTIVE_HIGH (0) 86 #define VSYNC_ACTIVE_LOW (1) 87 #define CFG_HSYNC_SYNC_EDGE (1) 88 #define HSYNC_ACTIVE_HIGH (0) 89 #define HSYNC_ACTIVE_LOW (1) 90 #define CFG_VFE_SUBSAMPLE_ENABLE BIT(4) 91 #define CFG_BUS_SUBSAMPLE_ENABLE BIT(5) 92 #define CFG_VFE_OUTPUT_EN BIT(6) 93 #define CFG_BUS_OUTPUT_EN BIT(7) 94 #define CFG_BINNING_EN BIT(9) 95 #define CFG_FRAME_BASED_EN BIT(10) 96 #define CFG_RAW_CROP_EN BIT(22) 97 98 #define VFE_REG_UPDATE_CMD (0x4ac) 99 #define REG_UPDATE_RDI(n) BIT(1 + (n)) 100 101 #define VFE_BUS_IRQ_MASK(n) (0x2044 + (n) * 4) 102 #define VFE_BUS_IRQ_CLEAR(n) (0x2050 + (n) * 4) 103 #define VFE_BUS_IRQ_STATUS(n) (0x205c + (n) * 4) 104 #define STATUS0_COMP_RESET_DONE BIT(0) 105 #define STATUS0_COMP_REG_UPDATE0_DONE BIT(1) 106 #define STATUS0_COMP_REG_UPDATE1_DONE BIT(2) 107 #define STATUS0_COMP_REG_UPDATE2_DONE BIT(3) 108 #define STATUS0_COMP_REG_UPDATE3_DONE BIT(4) 109 #define STATUS0_COMP_REG_UPDATE_DONE(n) BIT((n) + 1) 110 #define STATUS0_COMP0_BUF_DONE BIT(5) 111 #define STATUS0_COMP1_BUF_DONE BIT(6) 112 #define STATUS0_COMP2_BUF_DONE BIT(7) 113 #define STATUS0_COMP3_BUF_DONE BIT(8) 114 #define STATUS0_COMP4_BUF_DONE BIT(9) 115 #define STATUS0_COMP5_BUF_DONE BIT(10) 116 #define STATUS0_COMP_BUF_DONE(n) BIT((n) + 5) 117 #define STATUS0_COMP_ERROR BIT(11) 118 #define STATUS0_COMP_OVERWRITE BIT(12) 119 #define STATUS0_OVERFLOW BIT(13) 120 #define STATUS0_VIOLATION BIT(14) 121 /* WM_CLIENT_BUF_DONE defined for buffers 0:19 */ 122 #define STATUS1_WM_CLIENT_BUF_DONE(n) BIT(n) 123 #define STATUS1_EARLY_DONE BIT(24) 124 #define STATUS2_DUAL_COMP0_BUF_DONE BIT(0) 125 #define STATUS2_DUAL_COMP1_BUF_DONE BIT(1) 126 #define STATUS2_DUAL_COMP2_BUF_DONE BIT(2) 127 #define STATUS2_DUAL_COMP3_BUF_DONE BIT(3) 128 #define STATUS2_DUAL_COMP4_BUF_DONE BIT(4) 129 #define STATUS2_DUAL_COMP5_BUF_DONE BIT(5) 130 #define STATUS2_DUAL_COMP_BUF_DONE(n) BIT(n) 131 #define STATUS2_DUAL_COMP_ERROR BIT(6) 132 #define STATUS2_DUAL_COMP_OVERWRITE BIT(7) 133 134 #define VFE_BUS_IRQ_CLEAR_GLOBAL (0x2068) 135 136 #define VFE_BUS_WM_DEBUG_STATUS_CFG (0x226c) 137 #define DEBUG_STATUS_CFG_STATUS0(n) BIT(n) 138 #define DEBUG_STATUS_CFG_STATUS1(n) BIT(8 + (n)) 139 140 #define VFE_BUS_WM_ADDR_SYNC_FRAME_HEADER (0x2080) 141 142 #define VFE_BUS_WM_ADDR_SYNC_NO_SYNC (0x2084) 143 #define BUS_VER2_MAX_CLIENTS (24) 144 #define WM_ADDR_NO_SYNC_DEFAULT_VAL \ 145 ((1 << BUS_VER2_MAX_CLIENTS) - 1) 146 147 #define VFE_BUS_WM_CGC_OVERRIDE (0x200c) 148 #define WM_CGC_OVERRIDE_ALL (0xFFFFF) 149 150 #define VFE_BUS_WM_TEST_BUS_CTRL (0x211c) 151 152 #define VFE_BUS_WM_STATUS0(n) (0x2200 + (n) * 0x100) 153 #define VFE_BUS_WM_STATUS1(n) (0x2204 + (n) * 0x100) 154 #define VFE_BUS_WM_CFG(n) (0x2208 + (n) * 0x100) 155 #define WM_CFG_EN (0) 156 #define WM_CFG_MODE (1) 157 #define MODE_QCOM_PLAIN (0) 158 #define MODE_MIPI_RAW (1) 159 #define WM_CFG_VIRTUALFRAME (2) 160 #define VFE_BUS_WM_HEADER_ADDR(n) (0x220c + (n) * 0x100) 161 #define VFE_BUS_WM_HEADER_CFG(n) (0x2210 + (n) * 0x100) 162 #define VFE_BUS_WM_IMAGE_ADDR(n) (0x2214 + (n) * 0x100) 163 #define VFE_BUS_WM_IMAGE_ADDR_OFFSET(n) (0x2218 + (n) * 0x100) 164 #define VFE_BUS_WM_BUFFER_WIDTH_CFG(n) (0x221c + (n) * 0x100) 165 #define WM_BUFFER_DEFAULT_WIDTH (0xFF01) 166 167 #define VFE_BUS_WM_BUFFER_HEIGHT_CFG(n) (0x2220 + (n) * 0x100) 168 #define VFE_BUS_WM_PACKER_CFG(n) (0x2224 + (n) * 0x100) 169 170 #define VFE_BUS_WM_STRIDE(n) (0x2228 + (n) * 0x100) 171 #define WM_STRIDE_DEFAULT_STRIDE (0xFF01) 172 173 #define VFE_BUS_WM_IRQ_SUBSAMPLE_PERIOD(n) (0x2248 + (n) * 0x100) 174 #define VFE_BUS_WM_IRQ_SUBSAMPLE_PATTERN(n) (0x224c + (n) * 0x100) 175 #define VFE_BUS_WM_FRAMEDROP_PERIOD(n) (0x2250 + (n) * 0x100) 176 #define VFE_BUS_WM_FRAMEDROP_PATTERN(n) (0x2254 + (n) * 0x100) 177 #define VFE_BUS_WM_FRAME_INC(n) (0x2258 + (n) * 0x100) 178 #define VFE_BUS_WM_BURST_LIMIT(n) (0x225c + (n) * 0x100) 179 180 static u32 vfe_hw_version(struct vfe_device *vfe) 181 { 182 u32 hw_version = readl_relaxed(vfe->base + VFE_HW_VERSION); 183 184 u32 gen = (hw_version >> 28) & 0xF; 185 u32 rev = (hw_version >> 16) & 0xFFF; 186 u32 step = hw_version & 0xFFFF; 187 188 dev_dbg(vfe->camss->dev, "VFE HW Version = %u.%u.%u\n", 189 gen, rev, step); 190 191 return hw_version; 192 } 193 194 static inline void vfe_reg_set(struct vfe_device *vfe, u32 reg, u32 set_bits) 195 { 196 u32 bits = readl_relaxed(vfe->base + reg); 197 198 writel_relaxed(bits | set_bits, vfe->base + reg); 199 } 200 201 static void vfe_global_reset(struct vfe_device *vfe) 202 { 203 u32 reset_bits = GLOBAL_RESET_CMD_CORE | 204 GLOBAL_RESET_CMD_CAMIF | 205 GLOBAL_RESET_CMD_BUS | 206 GLOBAL_RESET_CMD_BUS_BDG | 207 GLOBAL_RESET_CMD_REGISTER | 208 GLOBAL_RESET_CMD_TESTGEN | 209 GLOBAL_RESET_CMD_DSP | 210 GLOBAL_RESET_CMD_IDLE_CGC | 211 GLOBAL_RESET_CMD_RDI0 | 212 GLOBAL_RESET_CMD_RDI1 | 213 GLOBAL_RESET_CMD_RDI2; 214 215 writel_relaxed(BIT(31), vfe->base + VFE_IRQ_MASK_0); 216 217 /* Make sure IRQ mask has been written before resetting */ 218 wmb(); 219 220 writel_relaxed(reset_bits, vfe->base + VFE_GLOBAL_RESET_CMD); 221 } 222 223 static void vfe_wm_start(struct vfe_device *vfe, u8 wm, struct vfe_line *line) 224 { 225 u32 val; 226 227 /*Set Debug Registers*/ 228 val = DEBUG_STATUS_CFG_STATUS0(1) | 229 DEBUG_STATUS_CFG_STATUS0(7); 230 writel_relaxed(val, vfe->base + VFE_BUS_WM_DEBUG_STATUS_CFG); 231 232 /* BUS_WM_INPUT_IF_ADDR_SYNC_FRAME_HEADER */ 233 writel_relaxed(0, vfe->base + VFE_BUS_WM_ADDR_SYNC_FRAME_HEADER); 234 235 /* no clock gating at bus input */ 236 val = WM_CGC_OVERRIDE_ALL; 237 writel_relaxed(val, vfe->base + VFE_BUS_WM_CGC_OVERRIDE); 238 239 writel_relaxed(0x0, vfe->base + VFE_BUS_WM_TEST_BUS_CTRL); 240 241 /* if addr_no_sync has default value then config the addr no sync reg */ 242 val = WM_ADDR_NO_SYNC_DEFAULT_VAL; 243 writel_relaxed(val, vfe->base + VFE_BUS_WM_ADDR_SYNC_NO_SYNC); 244 245 writel_relaxed(0xf, vfe->base + VFE_BUS_WM_BURST_LIMIT(wm)); 246 247 val = WM_BUFFER_DEFAULT_WIDTH; 248 writel_relaxed(val, vfe->base + VFE_BUS_WM_BUFFER_WIDTH_CFG(wm)); 249 250 val = 0; 251 writel_relaxed(val, vfe->base + VFE_BUS_WM_BUFFER_HEIGHT_CFG(wm)); 252 253 val = 0; 254 writel_relaxed(val, vfe->base + VFE_BUS_WM_PACKER_CFG(wm)); // XXX 1 for PLAIN8? 255 256 /* Configure stride for RDIs */ 257 val = WM_STRIDE_DEFAULT_STRIDE; 258 writel_relaxed(val, vfe->base + VFE_BUS_WM_STRIDE(wm)); 259 260 /* Enable WM */ 261 val = 1 << WM_CFG_EN | 262 MODE_MIPI_RAW << WM_CFG_MODE; 263 writel_relaxed(val, vfe->base + VFE_BUS_WM_CFG(wm)); 264 } 265 266 static void vfe_wm_stop(struct vfe_device *vfe, u8 wm) 267 { 268 /* Disable WM */ 269 writel_relaxed(0, vfe->base + VFE_BUS_WM_CFG(wm)); 270 } 271 272 static void vfe_wm_update(struct vfe_device *vfe, u8 wm, u32 addr, 273 struct vfe_line *line) 274 { 275 struct v4l2_pix_format_mplane *pix = 276 &line->video_out.active_fmt.fmt.pix_mp; 277 u32 stride = pix->plane_fmt[0].bytesperline; 278 279 writel_relaxed(addr, vfe->base + VFE_BUS_WM_IMAGE_ADDR(wm)); 280 writel_relaxed(stride * pix->height, vfe->base + VFE_BUS_WM_FRAME_INC(wm)); 281 } 282 283 static void vfe_reg_update(struct vfe_device *vfe, enum vfe_line_id line_id) 284 { 285 vfe->reg_update |= REG_UPDATE_RDI(line_id); 286 287 /* Enforce ordering between previous reg writes and reg update */ 288 wmb(); 289 290 writel_relaxed(vfe->reg_update, vfe->base + VFE_REG_UPDATE_CMD); 291 292 /* Enforce ordering between reg update and subsequent reg writes */ 293 wmb(); 294 } 295 296 static inline void vfe_reg_update_clear(struct vfe_device *vfe, 297 enum vfe_line_id line_id) 298 { 299 vfe->reg_update &= ~REG_UPDATE_RDI(line_id); 300 } 301 302 static void vfe_enable_irq_common(struct vfe_device *vfe) 303 { 304 vfe_reg_set(vfe, VFE_IRQ_MASK_0, ~0u); 305 vfe_reg_set(vfe, VFE_IRQ_MASK_1, ~0u); 306 307 writel_relaxed(~0u, vfe->base + VFE_BUS_IRQ_MASK(0)); 308 writel_relaxed(~0u, vfe->base + VFE_BUS_IRQ_MASK(1)); 309 writel_relaxed(~0u, vfe->base + VFE_BUS_IRQ_MASK(2)); 310 } 311 312 static void vfe_isr_halt_ack(struct vfe_device *vfe) 313 { 314 complete(&vfe->halt_complete); 315 } 316 317 static void vfe_isr_read(struct vfe_device *vfe, u32 *status0, u32 *status1) 318 { 319 *status0 = readl_relaxed(vfe->base + VFE_IRQ_STATUS_0); 320 *status1 = readl_relaxed(vfe->base + VFE_IRQ_STATUS_1); 321 322 writel_relaxed(*status0, vfe->base + VFE_IRQ_CLEAR_0); 323 writel_relaxed(*status1, vfe->base + VFE_IRQ_CLEAR_1); 324 325 /* Enforce ordering between IRQ Clear and Global IRQ Clear */ 326 wmb(); 327 writel_relaxed(CMD_GLOBAL_CLEAR, vfe->base + VFE_IRQ_CMD); 328 } 329 330 static void vfe_violation_read(struct vfe_device *vfe) 331 { 332 u32 violation = readl_relaxed(vfe->base + VFE_VIOLATION_STATUS); 333 334 pr_err_ratelimited("VFE: violation = 0x%08x\n", violation); 335 } 336 337 /* 338 * vfe_isr - VFE module interrupt handler 339 * @irq: Interrupt line 340 * @dev: VFE device 341 * 342 * Return IRQ_HANDLED on success 343 */ 344 static irqreturn_t vfe_isr(int irq, void *dev) 345 { 346 struct vfe_device *vfe = dev; 347 u32 status0, status1, vfe_bus_status[3]; 348 int i, wm; 349 350 status0 = readl_relaxed(vfe->base + VFE_IRQ_STATUS_0); 351 status1 = readl_relaxed(vfe->base + VFE_IRQ_STATUS_1); 352 353 writel_relaxed(status0, vfe->base + VFE_IRQ_CLEAR_0); 354 writel_relaxed(status1, vfe->base + VFE_IRQ_CLEAR_1); 355 356 for (i = VFE_LINE_RDI0; i <= VFE_LINE_RDI2; i++) { 357 vfe_bus_status[i] = readl_relaxed(vfe->base + VFE_BUS_IRQ_STATUS(i)); 358 writel_relaxed(vfe_bus_status[i], vfe->base + VFE_BUS_IRQ_CLEAR(i)); 359 } 360 361 /* Enforce ordering between IRQ reading and interpretation */ 362 wmb(); 363 364 writel_relaxed(CMD_GLOBAL_CLEAR, vfe->base + VFE_IRQ_CMD); 365 writel_relaxed(1, vfe->base + VFE_BUS_IRQ_CLEAR_GLOBAL); 366 367 if (status0 & STATUS_0_RESET_ACK) 368 vfe->isr_ops.reset_ack(vfe); 369 370 for (i = VFE_LINE_RDI0; i <= VFE_LINE_RDI2; i++) 371 if (status0 & STATUS_0_RDI_REG_UPDATE(i)) 372 vfe->isr_ops.reg_update(vfe, i); 373 374 for (i = VFE_LINE_RDI0; i <= VFE_LINE_RDI2; i++) 375 if (status0 & STATUS_1_RDI_SOF(i)) 376 vfe->isr_ops.sof(vfe, i); 377 378 for (i = 0; i < MSM_VFE_COMPOSITE_IRQ_NUM; i++) 379 if (vfe_bus_status[0] & STATUS0_COMP_BUF_DONE(i)) 380 vfe->isr_ops.comp_done(vfe, i); 381 382 for (wm = 0; wm < MSM_VFE_IMAGE_MASTERS_NUM; wm++) 383 if (status0 & BIT(9)) 384 if (vfe_bus_status[1] & STATUS1_WM_CLIENT_BUF_DONE(wm)) 385 vfe->isr_ops.wm_done(vfe, wm); 386 387 return IRQ_HANDLED; 388 } 389 390 /* 391 * vfe_halt - Trigger halt on VFE module and wait to complete 392 * @vfe: VFE device 393 * 394 * Return 0 on success or a negative error code otherwise 395 */ 396 static int vfe_halt(struct vfe_device *vfe) 397 { 398 /* rely on vfe_disable_output() to stop the VFE */ 399 return 0; 400 } 401 402 static int vfe_get_output(struct vfe_line *line) 403 { 404 struct vfe_device *vfe = to_vfe(line); 405 struct vfe_output *output; 406 unsigned long flags; 407 int wm_idx; 408 409 spin_lock_irqsave(&vfe->output_lock, flags); 410 411 output = &line->output; 412 if (output->state != VFE_OUTPUT_OFF) { 413 dev_err(vfe->camss->dev, "Output is running\n"); 414 goto error; 415 } 416 417 output->wm_num = 1; 418 419 wm_idx = vfe_reserve_wm(vfe, line->id); 420 if (wm_idx < 0) { 421 dev_err(vfe->camss->dev, "Can not reserve wm\n"); 422 goto error_get_wm; 423 } 424 output->wm_idx[0] = wm_idx; 425 426 output->drop_update_idx = 0; 427 428 spin_unlock_irqrestore(&vfe->output_lock, flags); 429 430 return 0; 431 432 error_get_wm: 433 vfe_release_wm(vfe, output->wm_idx[0]); 434 output->state = VFE_OUTPUT_OFF; 435 error: 436 spin_unlock_irqrestore(&vfe->output_lock, flags); 437 438 return -EINVAL; 439 } 440 441 static int vfe_enable_output(struct vfe_line *line) 442 { 443 struct vfe_device *vfe = to_vfe(line); 444 struct vfe_output *output = &line->output; 445 const struct vfe_hw_ops *ops = vfe->ops; 446 struct media_entity *sensor; 447 unsigned long flags; 448 unsigned int frame_skip = 0; 449 unsigned int i; 450 451 sensor = camss_find_sensor(&line->subdev.entity); 452 if (sensor) { 453 struct v4l2_subdev *subdev = media_entity_to_v4l2_subdev(sensor); 454 455 v4l2_subdev_call(subdev, sensor, g_skip_frames, &frame_skip); 456 /* Max frame skip is 29 frames */ 457 if (frame_skip > VFE_FRAME_DROP_VAL - 1) 458 frame_skip = VFE_FRAME_DROP_VAL - 1; 459 } 460 461 spin_lock_irqsave(&vfe->output_lock, flags); 462 463 ops->reg_update_clear(vfe, line->id); 464 465 if (output->state != VFE_OUTPUT_OFF) { 466 dev_err(vfe->camss->dev, "Output is not in reserved state %d\n", 467 output->state); 468 spin_unlock_irqrestore(&vfe->output_lock, flags); 469 return -EINVAL; 470 } 471 472 WARN_ON(output->gen2.active_num); 473 474 output->state = VFE_OUTPUT_ON; 475 476 output->sequence = 0; 477 output->wait_reg_update = 0; 478 reinit_completion(&output->reg_update); 479 480 vfe_wm_start(vfe, output->wm_idx[0], line); 481 482 for (i = 0; i < 2; i++) { 483 output->buf[i] = vfe_buf_get_pending(output); 484 if (!output->buf[i]) 485 break; 486 output->gen2.active_num++; 487 vfe_wm_update(vfe, output->wm_idx[0], output->buf[i]->addr[0], line); 488 } 489 490 ops->reg_update(vfe, line->id); 491 492 spin_unlock_irqrestore(&vfe->output_lock, flags); 493 494 return 0; 495 } 496 497 static int vfe_disable_output(struct vfe_line *line) 498 { 499 struct vfe_device *vfe = to_vfe(line); 500 struct vfe_output *output = &line->output; 501 unsigned long flags; 502 unsigned int i; 503 bool done; 504 int timeout = 0; 505 506 do { 507 spin_lock_irqsave(&vfe->output_lock, flags); 508 done = !output->gen2.active_num; 509 spin_unlock_irqrestore(&vfe->output_lock, flags); 510 usleep_range(10000, 20000); 511 512 if (timeout++ == 100) { 513 dev_err(vfe->camss->dev, "VFE idle timeout - resetting\n"); 514 vfe_reset(vfe); 515 output->gen2.active_num = 0; 516 return 0; 517 } 518 } while (!done); 519 520 spin_lock_irqsave(&vfe->output_lock, flags); 521 for (i = 0; i < output->wm_num; i++) 522 vfe_wm_stop(vfe, output->wm_idx[i]); 523 spin_unlock_irqrestore(&vfe->output_lock, flags); 524 525 return 0; 526 } 527 528 /* 529 * vfe_enable - Enable streaming on VFE line 530 * @line: VFE line 531 * 532 * Return 0 on success or a negative error code otherwise 533 */ 534 static int vfe_enable(struct vfe_line *line) 535 { 536 struct vfe_device *vfe = to_vfe(line); 537 int ret; 538 539 mutex_lock(&vfe->stream_lock); 540 541 if (!vfe->stream_count) 542 vfe_enable_irq_common(vfe); 543 544 vfe->stream_count++; 545 546 mutex_unlock(&vfe->stream_lock); 547 548 ret = vfe_get_output(line); 549 if (ret < 0) 550 goto error_get_output; 551 552 ret = vfe_enable_output(line); 553 if (ret < 0) 554 goto error_enable_output; 555 556 vfe->was_streaming = 1; 557 558 return 0; 559 560 error_enable_output: 561 vfe_put_output(line); 562 563 error_get_output: 564 mutex_lock(&vfe->stream_lock); 565 566 vfe->stream_count--; 567 568 mutex_unlock(&vfe->stream_lock); 569 570 return ret; 571 } 572 573 /* 574 * vfe_disable - Disable streaming on VFE line 575 * @line: VFE line 576 * 577 * Return 0 on success or a negative error code otherwise 578 */ 579 static int vfe_disable(struct vfe_line *line) 580 { 581 struct vfe_device *vfe = to_vfe(line); 582 583 vfe_disable_output(line); 584 585 vfe_put_output(line); 586 587 mutex_lock(&vfe->stream_lock); 588 589 vfe->stream_count--; 590 591 mutex_unlock(&vfe->stream_lock); 592 593 return 0; 594 } 595 596 /* 597 * vfe_isr_sof - Process start of frame interrupt 598 * @vfe: VFE Device 599 * @line_id: VFE line 600 */ 601 static void vfe_isr_sof(struct vfe_device *vfe, enum vfe_line_id line_id) 602 { 603 /* nop */ 604 } 605 606 /* 607 * vfe_isr_reg_update - Process reg update interrupt 608 * @vfe: VFE Device 609 * @line_id: VFE line 610 */ 611 static void vfe_isr_reg_update(struct vfe_device *vfe, enum vfe_line_id line_id) 612 { 613 struct vfe_output *output; 614 unsigned long flags; 615 616 spin_lock_irqsave(&vfe->output_lock, flags); 617 vfe->ops->reg_update_clear(vfe, line_id); 618 619 output = &vfe->line[line_id].output; 620 621 if (output->wait_reg_update) { 622 output->wait_reg_update = 0; 623 complete(&output->reg_update); 624 } 625 626 spin_unlock_irqrestore(&vfe->output_lock, flags); 627 } 628 629 /* 630 * vfe_isr_wm_done - Process write master done interrupt 631 * @vfe: VFE Device 632 * @wm: Write master id 633 */ 634 static void vfe_isr_wm_done(struct vfe_device *vfe, u8 wm) 635 { 636 struct vfe_line *line = &vfe->line[vfe->wm_output_map[wm]]; 637 struct camss_buffer *ready_buf; 638 struct vfe_output *output; 639 unsigned long flags; 640 u32 index; 641 u64 ts = ktime_get_ns(); 642 643 spin_lock_irqsave(&vfe->output_lock, flags); 644 645 if (vfe->wm_output_map[wm] == VFE_LINE_NONE) { 646 dev_err_ratelimited(vfe->camss->dev, 647 "Received wm done for unmapped index\n"); 648 goto out_unlock; 649 } 650 output = &vfe->line[vfe->wm_output_map[wm]].output; 651 652 ready_buf = output->buf[0]; 653 if (!ready_buf) { 654 dev_err_ratelimited(vfe->camss->dev, 655 "Missing ready buf %d!\n", output->state); 656 goto out_unlock; 657 } 658 659 ready_buf->vb.vb2_buf.timestamp = ts; 660 ready_buf->vb.sequence = output->sequence++; 661 662 index = 0; 663 output->buf[0] = output->buf[1]; 664 if (output->buf[0]) 665 index = 1; 666 667 output->buf[index] = vfe_buf_get_pending(output); 668 669 if (output->buf[index]) 670 vfe_wm_update(vfe, output->wm_idx[0], output->buf[index]->addr[0], line); 671 else 672 output->gen2.active_num--; 673 674 spin_unlock_irqrestore(&vfe->output_lock, flags); 675 676 vb2_buffer_done(&ready_buf->vb.vb2_buf, VB2_BUF_STATE_DONE); 677 678 return; 679 680 out_unlock: 681 spin_unlock_irqrestore(&vfe->output_lock, flags); 682 } 683 684 /* 685 * vfe_pm_domain_off - Disable power domains specific to this VFE. 686 * @vfe: VFE Device 687 */ 688 static void vfe_pm_domain_off(struct vfe_device *vfe) 689 { 690 struct camss *camss = vfe->camss; 691 692 if (vfe->id >= camss->vfe_num) 693 return; 694 695 device_link_del(camss->genpd_link[vfe->id]); 696 } 697 698 /* 699 * vfe_pm_domain_on - Enable power domains specific to this VFE. 700 * @vfe: VFE Device 701 */ 702 static int vfe_pm_domain_on(struct vfe_device *vfe) 703 { 704 struct camss *camss = vfe->camss; 705 enum vfe_line_id id = vfe->id; 706 707 if (id >= camss->vfe_num) 708 return 0; 709 710 camss->genpd_link[id] = device_link_add(camss->dev, camss->genpd[id], 711 DL_FLAG_STATELESS | 712 DL_FLAG_PM_RUNTIME | 713 DL_FLAG_RPM_ACTIVE); 714 if (!camss->genpd_link[id]) 715 return -EINVAL; 716 717 return 0; 718 } 719 720 /* 721 * vfe_queue_buffer - Add empty buffer 722 * @vid: Video device structure 723 * @buf: Buffer to be enqueued 724 * 725 * Add an empty buffer - depending on the current number of buffers it will be 726 * put in pending buffer queue or directly given to the hardware to be filled. 727 * 728 * Return 0 on success or a negative error code otherwise 729 */ 730 static int vfe_queue_buffer(struct camss_video *vid, 731 struct camss_buffer *buf) 732 { 733 struct vfe_line *line = container_of(vid, struct vfe_line, video_out); 734 struct vfe_device *vfe = to_vfe(line); 735 struct vfe_output *output; 736 unsigned long flags; 737 738 output = &line->output; 739 740 spin_lock_irqsave(&vfe->output_lock, flags); 741 742 if (output->state == VFE_OUTPUT_ON && output->gen2.active_num < 2) { 743 output->buf[output->gen2.active_num++] = buf; 744 vfe_wm_update(vfe, output->wm_idx[0], buf->addr[0], line); 745 } else { 746 vfe_buf_add_pending(output, buf); 747 } 748 749 spin_unlock_irqrestore(&vfe->output_lock, flags); 750 751 return 0; 752 } 753 754 static const struct vfe_isr_ops vfe_isr_ops_170 = { 755 .reset_ack = vfe_isr_reset_ack, 756 .halt_ack = vfe_isr_halt_ack, 757 .reg_update = vfe_isr_reg_update, 758 .sof = vfe_isr_sof, 759 .comp_done = vfe_isr_comp_done, 760 .wm_done = vfe_isr_wm_done, 761 }; 762 763 static const struct camss_video_ops vfe_video_ops_170 = { 764 .queue_buffer = vfe_queue_buffer, 765 .flush_buffers = vfe_flush_buffers, 766 }; 767 768 static void vfe_subdev_init(struct device *dev, struct vfe_device *vfe) 769 { 770 vfe->isr_ops = vfe_isr_ops_170; 771 vfe->video_ops = vfe_video_ops_170; 772 773 vfe->line_num = VFE_LINE_NUM_GEN2; 774 } 775 776 const struct vfe_hw_ops vfe_ops_170 = { 777 .global_reset = vfe_global_reset, 778 .hw_version = vfe_hw_version, 779 .isr_read = vfe_isr_read, 780 .isr = vfe_isr, 781 .pm_domain_off = vfe_pm_domain_off, 782 .pm_domain_on = vfe_pm_domain_on, 783 .reg_update_clear = vfe_reg_update_clear, 784 .reg_update = vfe_reg_update, 785 .subdev_init = vfe_subdev_init, 786 .vfe_disable = vfe_disable, 787 .vfe_enable = vfe_enable, 788 .vfe_halt = vfe_halt, 789 .violation_read = vfe_violation_read, 790 }; 791