1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (c) 2016 Allwinnertech Co., Ltd. 4 * Copyright (C) 2017-2018 Bootlin 5 * 6 * Maxime Ripard <maxime.ripard@bootlin.com> 7 */ 8 9 #include <linux/clk.h> 10 #include <linux/component.h> 11 #include <linux/crc-ccitt.h> 12 #include <linux/module.h> 13 #include <linux/of_address.h> 14 #include <linux/phy/phy-mipi-dphy.h> 15 #include <linux/phy/phy.h> 16 #include <linux/platform_device.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/regmap.h> 19 #include <linux/regulator/consumer.h> 20 #include <linux/reset.h> 21 #include <linux/slab.h> 22 23 #include <drm/drm_atomic_helper.h> 24 #include <drm/drm_mipi_dsi.h> 25 #include <drm/drm_panel.h> 26 #include <drm/drm_print.h> 27 #include <drm/drm_probe_helper.h> 28 29 #include "sun4i_crtc.h" 30 #include "sun4i_drv.h" 31 #include "sun4i_tcon.h" 32 #include "sun6i_mipi_dsi.h" 33 34 #include <video/mipi_display.h> 35 36 #define SUN6I_DSI_CTL_REG 0x000 37 #define SUN6I_DSI_CTL_EN BIT(0) 38 39 #define SUN6I_DSI_BASIC_CTL_REG 0x00c 40 #define SUN6I_DSI_BASIC_CTL_TRAIL_INV(n) (((n) & 0xf) << 4) 41 #define SUN6I_DSI_BASIC_CTL_TRAIL_FILL BIT(3) 42 #define SUN6I_DSI_BASIC_CTL_HBP_DIS BIT(2) 43 #define SUN6I_DSI_BASIC_CTL_HSA_HSE_DIS BIT(1) 44 #define SUN6I_DSI_BASIC_CTL_VIDEO_BURST BIT(0) 45 46 #define SUN6I_DSI_BASIC_CTL0_REG 0x010 47 #define SUN6I_DSI_BASIC_CTL0_HS_EOTP_EN BIT(18) 48 #define SUN6I_DSI_BASIC_CTL0_CRC_EN BIT(17) 49 #define SUN6I_DSI_BASIC_CTL0_ECC_EN BIT(16) 50 #define SUN6I_DSI_BASIC_CTL0_INST_ST BIT(0) 51 52 #define SUN6I_DSI_BASIC_CTL1_REG 0x014 53 #define SUN6I_DSI_BASIC_CTL1_VIDEO_ST_DELAY(n) (((n) & 0x1fff) << 4) 54 #define SUN6I_DSI_BASIC_CTL1_VIDEO_FILL BIT(2) 55 #define SUN6I_DSI_BASIC_CTL1_VIDEO_PRECISION BIT(1) 56 #define SUN6I_DSI_BASIC_CTL1_VIDEO_MODE BIT(0) 57 58 #define SUN6I_DSI_BASIC_SIZE0_REG 0x018 59 #define SUN6I_DSI_BASIC_SIZE0_VBP(n) (((n) & 0xfff) << 16) 60 #define SUN6I_DSI_BASIC_SIZE0_VSA(n) ((n) & 0xfff) 61 62 #define SUN6I_DSI_BASIC_SIZE1_REG 0x01c 63 #define SUN6I_DSI_BASIC_SIZE1_VT(n) (((n) & 0xfff) << 16) 64 #define SUN6I_DSI_BASIC_SIZE1_VACT(n) ((n) & 0xfff) 65 66 #define SUN6I_DSI_INST_FUNC_REG(n) (0x020 + (n) * 0x04) 67 #define SUN6I_DSI_INST_FUNC_INST_MODE(n) (((n) & 0xf) << 28) 68 #define SUN6I_DSI_INST_FUNC_ESCAPE_ENTRY(n) (((n) & 0xf) << 24) 69 #define SUN6I_DSI_INST_FUNC_TRANS_PACKET(n) (((n) & 0xf) << 20) 70 #define SUN6I_DSI_INST_FUNC_LANE_CEN BIT(4) 71 #define SUN6I_DSI_INST_FUNC_LANE_DEN(n) ((n) & 0xf) 72 73 #define SUN6I_DSI_INST_LOOP_SEL_REG 0x040 74 75 #define SUN6I_DSI_INST_LOOP_NUM_REG(n) (0x044 + (n) * 0x10) 76 #define SUN6I_DSI_INST_LOOP_NUM_N1(n) (((n) & 0xfff) << 16) 77 #define SUN6I_DSI_INST_LOOP_NUM_N0(n) ((n) & 0xfff) 78 79 #define SUN6I_DSI_INST_JUMP_SEL_REG 0x048 80 81 #define SUN6I_DSI_INST_JUMP_CFG_REG(n) (0x04c + (n) * 0x04) 82 #define SUN6I_DSI_INST_JUMP_CFG_TO(n) (((n) & 0xf) << 20) 83 #define SUN6I_DSI_INST_JUMP_CFG_POINT(n) (((n) & 0xf) << 16) 84 #define SUN6I_DSI_INST_JUMP_CFG_NUM(n) ((n) & 0xffff) 85 86 #define SUN6I_DSI_TRANS_START_REG 0x060 87 88 #define SUN6I_DSI_TRANS_ZERO_REG 0x078 89 90 #define SUN6I_DSI_TCON_DRQ_REG 0x07c 91 #define SUN6I_DSI_TCON_DRQ_ENABLE_MODE BIT(28) 92 #define SUN6I_DSI_TCON_DRQ_SET(n) ((n) & 0x3ff) 93 94 #define SUN6I_DSI_PIXEL_CTL0_REG 0x080 95 #define SUN6I_DSI_PIXEL_CTL0_PD_PLUG_DISABLE BIT(16) 96 #define SUN6I_DSI_PIXEL_CTL0_FORMAT(n) ((n) & 0xf) 97 98 #define SUN6I_DSI_PIXEL_CTL1_REG 0x084 99 100 #define SUN6I_DSI_PIXEL_PH_REG 0x090 101 #define SUN6I_DSI_PIXEL_PH_ECC(n) (((n) & 0xff) << 24) 102 #define SUN6I_DSI_PIXEL_PH_WC(n) (((n) & 0xffff) << 8) 103 #define SUN6I_DSI_PIXEL_PH_VC(n) (((n) & 3) << 6) 104 #define SUN6I_DSI_PIXEL_PH_DT(n) ((n) & 0x3f) 105 106 #define SUN6I_DSI_PIXEL_PF0_REG 0x098 107 #define SUN6I_DSI_PIXEL_PF0_CRC_FORCE(n) ((n) & 0xffff) 108 109 #define SUN6I_DSI_PIXEL_PF1_REG 0x09c 110 #define SUN6I_DSI_PIXEL_PF1_CRC_INIT_LINEN(n) (((n) & 0xffff) << 16) 111 #define SUN6I_DSI_PIXEL_PF1_CRC_INIT_LINE0(n) ((n) & 0xffff) 112 113 #define SUN6I_DSI_SYNC_HSS_REG 0x0b0 114 115 #define SUN6I_DSI_SYNC_HSE_REG 0x0b4 116 117 #define SUN6I_DSI_SYNC_VSS_REG 0x0b8 118 119 #define SUN6I_DSI_SYNC_VSE_REG 0x0bc 120 121 #define SUN6I_DSI_BLK_HSA0_REG 0x0c0 122 123 #define SUN6I_DSI_BLK_HSA1_REG 0x0c4 124 #define SUN6I_DSI_BLK_PF(n) (((n) & 0xffff) << 16) 125 #define SUN6I_DSI_BLK_PD(n) ((n) & 0xff) 126 127 #define SUN6I_DSI_BLK_HBP0_REG 0x0c8 128 129 #define SUN6I_DSI_BLK_HBP1_REG 0x0cc 130 131 #define SUN6I_DSI_BLK_HFP0_REG 0x0d0 132 133 #define SUN6I_DSI_BLK_HFP1_REG 0x0d4 134 135 #define SUN6I_DSI_BLK_HBLK0_REG 0x0e0 136 137 #define SUN6I_DSI_BLK_HBLK1_REG 0x0e4 138 139 #define SUN6I_DSI_BLK_VBLK0_REG 0x0e8 140 141 #define SUN6I_DSI_BLK_VBLK1_REG 0x0ec 142 143 #define SUN6I_DSI_BURST_LINE_REG 0x0f0 144 #define SUN6I_DSI_BURST_LINE_SYNC_POINT(n) (((n) & 0xffff) << 16) 145 #define SUN6I_DSI_BURST_LINE_NUM(n) ((n) & 0xffff) 146 147 #define SUN6I_DSI_BURST_DRQ_REG 0x0f4 148 #define SUN6I_DSI_BURST_DRQ_EDGE1(n) (((n) & 0xffff) << 16) 149 #define SUN6I_DSI_BURST_DRQ_EDGE0(n) ((n) & 0xffff) 150 151 #define SUN6I_DSI_CMD_CTL_REG 0x200 152 #define SUN6I_DSI_CMD_CTL_RX_OVERFLOW BIT(26) 153 #define SUN6I_DSI_CMD_CTL_RX_FLAG BIT(25) 154 #define SUN6I_DSI_CMD_CTL_TX_FLAG BIT(9) 155 156 #define SUN6I_DSI_CMD_RX_REG(n) (0x240 + (n) * 0x04) 157 158 #define SUN6I_DSI_DEBUG_DATA_REG 0x2f8 159 160 #define SUN6I_DSI_CMD_TX_REG(n) (0x300 + (n) * 0x04) 161 162 #define SUN6I_DSI_SYNC_POINT 40 163 164 enum sun6i_dsi_start_inst { 165 DSI_START_LPRX, 166 DSI_START_LPTX, 167 DSI_START_HSC, 168 DSI_START_HSD, 169 }; 170 171 enum sun6i_dsi_inst_id { 172 DSI_INST_ID_LP11 = 0, 173 DSI_INST_ID_TBA, 174 DSI_INST_ID_HSC, 175 DSI_INST_ID_HSD, 176 DSI_INST_ID_LPDT, 177 DSI_INST_ID_HSCEXIT, 178 DSI_INST_ID_NOP, 179 DSI_INST_ID_DLY, 180 DSI_INST_ID_END = 15, 181 }; 182 183 enum sun6i_dsi_inst_mode { 184 DSI_INST_MODE_STOP = 0, 185 DSI_INST_MODE_TBA, 186 DSI_INST_MODE_HS, 187 DSI_INST_MODE_ESCAPE, 188 DSI_INST_MODE_HSCEXIT, 189 DSI_INST_MODE_NOP, 190 }; 191 192 enum sun6i_dsi_inst_escape { 193 DSI_INST_ESCA_LPDT = 0, 194 DSI_INST_ESCA_ULPS, 195 DSI_INST_ESCA_UN1, 196 DSI_INST_ESCA_UN2, 197 DSI_INST_ESCA_RESET, 198 DSI_INST_ESCA_UN3, 199 DSI_INST_ESCA_UN4, 200 DSI_INST_ESCA_UN5, 201 }; 202 203 enum sun6i_dsi_inst_packet { 204 DSI_INST_PACK_PIXEL = 0, 205 DSI_INST_PACK_COMMAND, 206 }; 207 208 static const u32 sun6i_dsi_ecc_array[] = { 209 [0] = (BIT(0) | BIT(1) | BIT(2) | BIT(4) | BIT(5) | BIT(7) | BIT(10) | 210 BIT(11) | BIT(13) | BIT(16) | BIT(20) | BIT(21) | BIT(22) | 211 BIT(23)), 212 [1] = (BIT(0) | BIT(1) | BIT(3) | BIT(4) | BIT(6) | BIT(8) | BIT(10) | 213 BIT(12) | BIT(14) | BIT(17) | BIT(20) | BIT(21) | BIT(22) | 214 BIT(23)), 215 [2] = (BIT(0) | BIT(2) | BIT(3) | BIT(5) | BIT(6) | BIT(9) | BIT(11) | 216 BIT(12) | BIT(15) | BIT(18) | BIT(20) | BIT(21) | BIT(22)), 217 [3] = (BIT(1) | BIT(2) | BIT(3) | BIT(7) | BIT(8) | BIT(9) | BIT(13) | 218 BIT(14) | BIT(15) | BIT(19) | BIT(20) | BIT(21) | BIT(23)), 219 [4] = (BIT(4) | BIT(5) | BIT(6) | BIT(7) | BIT(8) | BIT(9) | BIT(16) | 220 BIT(17) | BIT(18) | BIT(19) | BIT(20) | BIT(22) | BIT(23)), 221 [5] = (BIT(10) | BIT(11) | BIT(12) | BIT(13) | BIT(14) | BIT(15) | 222 BIT(16) | BIT(17) | BIT(18) | BIT(19) | BIT(21) | BIT(22) | 223 BIT(23)), 224 }; 225 226 static u32 sun6i_dsi_ecc_compute(unsigned int data) 227 { 228 int i; 229 u8 ecc = 0; 230 231 for (i = 0; i < ARRAY_SIZE(sun6i_dsi_ecc_array); i++) { 232 u32 field = sun6i_dsi_ecc_array[i]; 233 bool init = false; 234 u8 val = 0; 235 int j; 236 237 for (j = 0; j < 24; j++) { 238 if (!(BIT(j) & field)) 239 continue; 240 241 if (!init) { 242 val = (BIT(j) & data) ? 1 : 0; 243 init = true; 244 } else { 245 val ^= (BIT(j) & data) ? 1 : 0; 246 } 247 } 248 249 ecc |= val << i; 250 } 251 252 return ecc; 253 } 254 255 static u16 sun6i_dsi_crc_compute(u8 const *buffer, size_t len) 256 { 257 return crc_ccitt(0xffff, buffer, len); 258 } 259 260 static u16 sun6i_dsi_crc_repeat(u8 pd, u8 *buffer, size_t len) 261 { 262 memset(buffer, pd, len); 263 264 return sun6i_dsi_crc_compute(buffer, len); 265 } 266 267 static u32 sun6i_dsi_build_sync_pkt(u8 dt, u8 vc, u8 d0, u8 d1) 268 { 269 u32 val = dt & 0x3f; 270 271 val |= (vc & 3) << 6; 272 val |= (d0 & 0xff) << 8; 273 val |= (d1 & 0xff) << 16; 274 val |= sun6i_dsi_ecc_compute(val) << 24; 275 276 return val; 277 } 278 279 static u32 sun6i_dsi_build_blk0_pkt(u8 vc, u16 wc) 280 { 281 return sun6i_dsi_build_sync_pkt(MIPI_DSI_BLANKING_PACKET, vc, 282 wc & 0xff, wc >> 8); 283 } 284 285 static u32 sun6i_dsi_build_blk1_pkt(u16 pd, u8 *buffer, size_t len) 286 { 287 u32 val = SUN6I_DSI_BLK_PD(pd); 288 289 return val | SUN6I_DSI_BLK_PF(sun6i_dsi_crc_repeat(pd, buffer, len)); 290 } 291 292 static void sun6i_dsi_inst_abort(struct sun6i_dsi *dsi) 293 { 294 regmap_update_bits(dsi->regs, SUN6I_DSI_BASIC_CTL0_REG, 295 SUN6I_DSI_BASIC_CTL0_INST_ST, 0); 296 } 297 298 static void sun6i_dsi_inst_commit(struct sun6i_dsi *dsi) 299 { 300 regmap_update_bits(dsi->regs, SUN6I_DSI_BASIC_CTL0_REG, 301 SUN6I_DSI_BASIC_CTL0_INST_ST, 302 SUN6I_DSI_BASIC_CTL0_INST_ST); 303 } 304 305 static int sun6i_dsi_inst_wait_for_completion(struct sun6i_dsi *dsi) 306 { 307 u32 val; 308 309 return regmap_read_poll_timeout(dsi->regs, SUN6I_DSI_BASIC_CTL0_REG, 310 val, 311 !(val & SUN6I_DSI_BASIC_CTL0_INST_ST), 312 100, 5000); 313 } 314 315 static void sun6i_dsi_inst_setup(struct sun6i_dsi *dsi, 316 enum sun6i_dsi_inst_id id, 317 enum sun6i_dsi_inst_mode mode, 318 bool clock, u8 data, 319 enum sun6i_dsi_inst_packet packet, 320 enum sun6i_dsi_inst_escape escape) 321 { 322 regmap_write(dsi->regs, SUN6I_DSI_INST_FUNC_REG(id), 323 SUN6I_DSI_INST_FUNC_INST_MODE(mode) | 324 SUN6I_DSI_INST_FUNC_ESCAPE_ENTRY(escape) | 325 SUN6I_DSI_INST_FUNC_TRANS_PACKET(packet) | 326 (clock ? SUN6I_DSI_INST_FUNC_LANE_CEN : 0) | 327 SUN6I_DSI_INST_FUNC_LANE_DEN(data)); 328 } 329 330 static void sun6i_dsi_inst_init(struct sun6i_dsi *dsi, 331 struct mipi_dsi_device *device) 332 { 333 u8 lanes_mask = GENMASK(device->lanes - 1, 0); 334 335 sun6i_dsi_inst_setup(dsi, DSI_INST_ID_LP11, DSI_INST_MODE_STOP, 336 true, lanes_mask, 0, 0); 337 338 sun6i_dsi_inst_setup(dsi, DSI_INST_ID_TBA, DSI_INST_MODE_TBA, 339 false, 1, 0, 0); 340 341 sun6i_dsi_inst_setup(dsi, DSI_INST_ID_HSC, DSI_INST_MODE_HS, 342 true, 0, DSI_INST_PACK_PIXEL, 0); 343 344 sun6i_dsi_inst_setup(dsi, DSI_INST_ID_HSD, DSI_INST_MODE_HS, 345 false, lanes_mask, DSI_INST_PACK_PIXEL, 0); 346 347 sun6i_dsi_inst_setup(dsi, DSI_INST_ID_LPDT, DSI_INST_MODE_ESCAPE, 348 false, 1, DSI_INST_PACK_COMMAND, 349 DSI_INST_ESCA_LPDT); 350 351 sun6i_dsi_inst_setup(dsi, DSI_INST_ID_HSCEXIT, DSI_INST_MODE_HSCEXIT, 352 true, 0, 0, 0); 353 354 sun6i_dsi_inst_setup(dsi, DSI_INST_ID_NOP, DSI_INST_MODE_STOP, 355 false, lanes_mask, 0, 0); 356 357 sun6i_dsi_inst_setup(dsi, DSI_INST_ID_DLY, DSI_INST_MODE_NOP, 358 true, lanes_mask, 0, 0); 359 360 regmap_write(dsi->regs, SUN6I_DSI_INST_JUMP_CFG_REG(0), 361 SUN6I_DSI_INST_JUMP_CFG_POINT(DSI_INST_ID_NOP) | 362 SUN6I_DSI_INST_JUMP_CFG_TO(DSI_INST_ID_HSCEXIT) | 363 SUN6I_DSI_INST_JUMP_CFG_NUM(1)); 364 }; 365 366 static u16 sun6i_dsi_get_video_start_delay(struct sun6i_dsi *dsi, 367 struct drm_display_mode *mode) 368 { 369 u16 delay = mode->vtotal - (mode->vsync_start - mode->vdisplay) + 1; 370 371 if (delay > mode->vtotal) 372 delay = delay % mode->vtotal; 373 374 return max_t(u16, delay, 1); 375 } 376 377 static u16 sun6i_dsi_get_line_num(struct sun6i_dsi *dsi, 378 struct drm_display_mode *mode) 379 { 380 struct mipi_dsi_device *device = dsi->device; 381 unsigned int Bpp = mipi_dsi_pixel_format_to_bpp(device->format) / 8; 382 383 return mode->htotal * Bpp / device->lanes; 384 } 385 386 static u16 sun6i_dsi_get_drq_edge0(struct sun6i_dsi *dsi, 387 struct drm_display_mode *mode, 388 u16 line_num, u16 edge1) 389 { 390 u16 edge0 = edge1; 391 392 edge0 += (mode->hdisplay + 40) * SUN6I_DSI_TCON_DIV / 8; 393 394 if (edge0 > line_num) 395 return edge0 - line_num; 396 397 return 1; 398 } 399 400 static u16 sun6i_dsi_get_drq_edge1(struct sun6i_dsi *dsi, 401 struct drm_display_mode *mode, 402 u16 line_num) 403 { 404 struct mipi_dsi_device *device = dsi->device; 405 unsigned int Bpp = mipi_dsi_pixel_format_to_bpp(device->format) / 8; 406 unsigned int hbp = mode->htotal - mode->hsync_end; 407 u16 edge1; 408 409 edge1 = SUN6I_DSI_SYNC_POINT; 410 edge1 += (mode->hdisplay + hbp + 20) * Bpp / device->lanes; 411 412 if (edge1 > line_num) 413 return line_num; 414 415 return edge1; 416 } 417 418 static void sun6i_dsi_setup_burst(struct sun6i_dsi *dsi, 419 struct drm_display_mode *mode) 420 { 421 struct mipi_dsi_device *device = dsi->device; 422 u32 val = 0; 423 424 if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) { 425 u16 line_num = sun6i_dsi_get_line_num(dsi, mode); 426 u16 edge0, edge1; 427 428 edge1 = sun6i_dsi_get_drq_edge1(dsi, mode, line_num); 429 edge0 = sun6i_dsi_get_drq_edge0(dsi, mode, line_num, edge1); 430 431 regmap_write(dsi->regs, SUN6I_DSI_BURST_DRQ_REG, 432 SUN6I_DSI_BURST_DRQ_EDGE0(edge0) | 433 SUN6I_DSI_BURST_DRQ_EDGE1(edge1)); 434 435 regmap_write(dsi->regs, SUN6I_DSI_BURST_LINE_REG, 436 SUN6I_DSI_BURST_LINE_NUM(line_num) | 437 SUN6I_DSI_BURST_LINE_SYNC_POINT(SUN6I_DSI_SYNC_POINT)); 438 439 val = SUN6I_DSI_TCON_DRQ_ENABLE_MODE; 440 } else if ((mode->hsync_start - mode->hdisplay) > 20) { 441 /* Maaaaaagic */ 442 u16 drq = (mode->hsync_start - mode->hdisplay) - 20; 443 444 drq *= mipi_dsi_pixel_format_to_bpp(device->format); 445 drq /= 32; 446 447 val = (SUN6I_DSI_TCON_DRQ_ENABLE_MODE | 448 SUN6I_DSI_TCON_DRQ_SET(drq)); 449 } 450 451 regmap_write(dsi->regs, SUN6I_DSI_TCON_DRQ_REG, val); 452 } 453 454 static void sun6i_dsi_setup_inst_loop(struct sun6i_dsi *dsi, 455 struct drm_display_mode *mode) 456 { 457 struct mipi_dsi_device *device = dsi->device; 458 u16 delay = 50 - 1; 459 460 if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) { 461 u32 hsync_porch = (mode->htotal - mode->hdisplay) * 150; 462 463 delay = (hsync_porch / ((mode->clock / 1000) * 8)); 464 delay -= 50; 465 } 466 467 regmap_write(dsi->regs, SUN6I_DSI_INST_LOOP_SEL_REG, 468 2 << (4 * DSI_INST_ID_LP11) | 469 3 << (4 * DSI_INST_ID_DLY)); 470 471 regmap_write(dsi->regs, SUN6I_DSI_INST_LOOP_NUM_REG(0), 472 SUN6I_DSI_INST_LOOP_NUM_N0(50 - 1) | 473 SUN6I_DSI_INST_LOOP_NUM_N1(delay)); 474 regmap_write(dsi->regs, SUN6I_DSI_INST_LOOP_NUM_REG(1), 475 SUN6I_DSI_INST_LOOP_NUM_N0(50 - 1) | 476 SUN6I_DSI_INST_LOOP_NUM_N1(delay)); 477 } 478 479 static void sun6i_dsi_setup_format(struct sun6i_dsi *dsi, 480 struct drm_display_mode *mode) 481 { 482 struct mipi_dsi_device *device = dsi->device; 483 u32 val = SUN6I_DSI_PIXEL_PH_VC(device->channel); 484 u8 dt, fmt; 485 u16 wc; 486 487 /* 488 * TODO: The format defines are only valid in video mode and 489 * change in command mode. 490 */ 491 switch (device->format) { 492 case MIPI_DSI_FMT_RGB888: 493 dt = MIPI_DSI_PACKED_PIXEL_STREAM_24; 494 fmt = 8; 495 break; 496 case MIPI_DSI_FMT_RGB666: 497 dt = MIPI_DSI_PIXEL_STREAM_3BYTE_18; 498 fmt = 9; 499 break; 500 case MIPI_DSI_FMT_RGB666_PACKED: 501 dt = MIPI_DSI_PACKED_PIXEL_STREAM_18; 502 fmt = 10; 503 break; 504 case MIPI_DSI_FMT_RGB565: 505 dt = MIPI_DSI_PACKED_PIXEL_STREAM_16; 506 fmt = 11; 507 break; 508 default: 509 return; 510 } 511 val |= SUN6I_DSI_PIXEL_PH_DT(dt); 512 513 wc = mode->hdisplay * mipi_dsi_pixel_format_to_bpp(device->format) / 8; 514 val |= SUN6I_DSI_PIXEL_PH_WC(wc); 515 val |= SUN6I_DSI_PIXEL_PH_ECC(sun6i_dsi_ecc_compute(val)); 516 517 regmap_write(dsi->regs, SUN6I_DSI_PIXEL_PH_REG, val); 518 519 regmap_write(dsi->regs, SUN6I_DSI_PIXEL_PF0_REG, 520 SUN6I_DSI_PIXEL_PF0_CRC_FORCE(0xffff)); 521 522 regmap_write(dsi->regs, SUN6I_DSI_PIXEL_PF1_REG, 523 SUN6I_DSI_PIXEL_PF1_CRC_INIT_LINE0(0xffff) | 524 SUN6I_DSI_PIXEL_PF1_CRC_INIT_LINEN(0xffff)); 525 526 regmap_write(dsi->regs, SUN6I_DSI_PIXEL_CTL0_REG, 527 SUN6I_DSI_PIXEL_CTL0_PD_PLUG_DISABLE | 528 SUN6I_DSI_PIXEL_CTL0_FORMAT(fmt)); 529 } 530 531 static void sun6i_dsi_setup_timings(struct sun6i_dsi *dsi, 532 struct drm_display_mode *mode) 533 { 534 struct mipi_dsi_device *device = dsi->device; 535 unsigned int Bpp = mipi_dsi_pixel_format_to_bpp(device->format) / 8; 536 u16 hbp = 0, hfp = 0, hsa = 0, hblk = 0, vblk = 0; 537 u32 basic_ctl = 0; 538 size_t bytes; 539 u8 *buffer; 540 541 /* Do all timing calculations up front to allocate buffer space */ 542 543 if (device->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) { 544 hblk = mode->hdisplay * Bpp; 545 basic_ctl = SUN6I_DSI_BASIC_CTL_VIDEO_BURST | 546 SUN6I_DSI_BASIC_CTL_HSA_HSE_DIS | 547 SUN6I_DSI_BASIC_CTL_HBP_DIS; 548 549 if (device->lanes == 4) 550 basic_ctl |= SUN6I_DSI_BASIC_CTL_TRAIL_FILL | 551 SUN6I_DSI_BASIC_CTL_TRAIL_INV(0xc); 552 } else { 553 /* 554 * A sync period is composed of a blanking packet (4 555 * bytes + payload + 2 bytes) and a sync event packet 556 * (4 bytes). Its minimal size is therefore 10 bytes 557 */ 558 #define HSA_PACKET_OVERHEAD 10 559 hsa = max((unsigned int)HSA_PACKET_OVERHEAD, 560 (mode->hsync_end - mode->hsync_start) * Bpp - HSA_PACKET_OVERHEAD); 561 562 /* 563 * The backporch is set using a blanking packet (4 564 * bytes + payload + 2 bytes). Its minimal size is 565 * therefore 6 bytes 566 */ 567 #define HBP_PACKET_OVERHEAD 6 568 hbp = max((unsigned int)HBP_PACKET_OVERHEAD, 569 (mode->htotal - mode->hsync_end) * Bpp - HBP_PACKET_OVERHEAD); 570 571 /* 572 * The frontporch is set using a sync event (4 bytes) 573 * and two blanking packets (each one is 4 bytes + 574 * payload + 2 bytes). Its minimal size is therefore 575 * 16 bytes 576 */ 577 #define HFP_PACKET_OVERHEAD 16 578 hfp = max((unsigned int)HFP_PACKET_OVERHEAD, 579 (mode->hsync_start - mode->hdisplay) * Bpp - HFP_PACKET_OVERHEAD); 580 581 /* 582 * The blanking is set using a sync event (4 bytes) 583 * and a blanking packet (4 bytes + payload + 2 584 * bytes). Its minimal size is therefore 10 bytes. 585 */ 586 #define HBLK_PACKET_OVERHEAD 10 587 hblk = max((unsigned int)HBLK_PACKET_OVERHEAD, 588 (mode->htotal - (mode->hsync_end - mode->hsync_start)) * Bpp - 589 HBLK_PACKET_OVERHEAD); 590 591 /* 592 * And I'm not entirely sure what vblk is about. The driver in 593 * Allwinner BSP is using a rather convoluted calculation 594 * there only for 4 lanes. However, using 0 (the !4 lanes 595 * case) even with a 4 lanes screen seems to work... 596 */ 597 vblk = 0; 598 } 599 600 /* How many bytes do we need to send all payloads? */ 601 bytes = max_t(size_t, max(max(hfp, hblk), max(hsa, hbp)), vblk); 602 buffer = kmalloc(bytes, GFP_KERNEL); 603 if (WARN_ON(!buffer)) 604 return; 605 606 regmap_write(dsi->regs, SUN6I_DSI_BASIC_CTL_REG, basic_ctl); 607 608 regmap_write(dsi->regs, SUN6I_DSI_SYNC_HSS_REG, 609 sun6i_dsi_build_sync_pkt(MIPI_DSI_H_SYNC_START, 610 device->channel, 611 0, 0)); 612 613 regmap_write(dsi->regs, SUN6I_DSI_SYNC_HSE_REG, 614 sun6i_dsi_build_sync_pkt(MIPI_DSI_H_SYNC_END, 615 device->channel, 616 0, 0)); 617 618 regmap_write(dsi->regs, SUN6I_DSI_SYNC_VSS_REG, 619 sun6i_dsi_build_sync_pkt(MIPI_DSI_V_SYNC_START, 620 device->channel, 621 0, 0)); 622 623 regmap_write(dsi->regs, SUN6I_DSI_SYNC_VSE_REG, 624 sun6i_dsi_build_sync_pkt(MIPI_DSI_V_SYNC_END, 625 device->channel, 626 0, 0)); 627 628 regmap_write(dsi->regs, SUN6I_DSI_BASIC_SIZE0_REG, 629 SUN6I_DSI_BASIC_SIZE0_VSA(mode->vsync_end - 630 mode->vsync_start) | 631 SUN6I_DSI_BASIC_SIZE0_VBP(mode->vtotal - 632 mode->vsync_end)); 633 634 regmap_write(dsi->regs, SUN6I_DSI_BASIC_SIZE1_REG, 635 SUN6I_DSI_BASIC_SIZE1_VACT(mode->vdisplay) | 636 SUN6I_DSI_BASIC_SIZE1_VT(mode->vtotal)); 637 638 /* sync */ 639 regmap_write(dsi->regs, SUN6I_DSI_BLK_HSA0_REG, 640 sun6i_dsi_build_blk0_pkt(device->channel, hsa)); 641 regmap_write(dsi->regs, SUN6I_DSI_BLK_HSA1_REG, 642 sun6i_dsi_build_blk1_pkt(0, buffer, hsa)); 643 644 /* backporch */ 645 regmap_write(dsi->regs, SUN6I_DSI_BLK_HBP0_REG, 646 sun6i_dsi_build_blk0_pkt(device->channel, hbp)); 647 regmap_write(dsi->regs, SUN6I_DSI_BLK_HBP1_REG, 648 sun6i_dsi_build_blk1_pkt(0, buffer, hbp)); 649 650 /* frontporch */ 651 regmap_write(dsi->regs, SUN6I_DSI_BLK_HFP0_REG, 652 sun6i_dsi_build_blk0_pkt(device->channel, hfp)); 653 regmap_write(dsi->regs, SUN6I_DSI_BLK_HFP1_REG, 654 sun6i_dsi_build_blk1_pkt(0, buffer, hfp)); 655 656 /* hblk */ 657 regmap_write(dsi->regs, SUN6I_DSI_BLK_HBLK0_REG, 658 sun6i_dsi_build_blk0_pkt(device->channel, hblk)); 659 regmap_write(dsi->regs, SUN6I_DSI_BLK_HBLK1_REG, 660 sun6i_dsi_build_blk1_pkt(0, buffer, hblk)); 661 662 /* vblk */ 663 regmap_write(dsi->regs, SUN6I_DSI_BLK_VBLK0_REG, 664 sun6i_dsi_build_blk0_pkt(device->channel, vblk)); 665 regmap_write(dsi->regs, SUN6I_DSI_BLK_VBLK1_REG, 666 sun6i_dsi_build_blk1_pkt(0, buffer, vblk)); 667 668 kfree(buffer); 669 } 670 671 static int sun6i_dsi_start(struct sun6i_dsi *dsi, 672 enum sun6i_dsi_start_inst func) 673 { 674 switch (func) { 675 case DSI_START_LPTX: 676 regmap_write(dsi->regs, SUN6I_DSI_INST_JUMP_SEL_REG, 677 DSI_INST_ID_LPDT << (4 * DSI_INST_ID_LP11) | 678 DSI_INST_ID_END << (4 * DSI_INST_ID_LPDT)); 679 break; 680 case DSI_START_LPRX: 681 regmap_write(dsi->regs, SUN6I_DSI_INST_JUMP_SEL_REG, 682 DSI_INST_ID_LPDT << (4 * DSI_INST_ID_LP11) | 683 DSI_INST_ID_DLY << (4 * DSI_INST_ID_LPDT) | 684 DSI_INST_ID_TBA << (4 * DSI_INST_ID_DLY) | 685 DSI_INST_ID_END << (4 * DSI_INST_ID_TBA)); 686 break; 687 case DSI_START_HSC: 688 regmap_write(dsi->regs, SUN6I_DSI_INST_JUMP_SEL_REG, 689 DSI_INST_ID_HSC << (4 * DSI_INST_ID_LP11) | 690 DSI_INST_ID_END << (4 * DSI_INST_ID_HSC)); 691 break; 692 case DSI_START_HSD: 693 regmap_write(dsi->regs, SUN6I_DSI_INST_JUMP_SEL_REG, 694 DSI_INST_ID_NOP << (4 * DSI_INST_ID_LP11) | 695 DSI_INST_ID_HSD << (4 * DSI_INST_ID_NOP) | 696 DSI_INST_ID_DLY << (4 * DSI_INST_ID_HSD) | 697 DSI_INST_ID_NOP << (4 * DSI_INST_ID_DLY) | 698 DSI_INST_ID_END << (4 * DSI_INST_ID_HSCEXIT)); 699 break; 700 default: 701 regmap_write(dsi->regs, SUN6I_DSI_INST_JUMP_SEL_REG, 702 DSI_INST_ID_END << (4 * DSI_INST_ID_LP11)); 703 break; 704 } 705 706 sun6i_dsi_inst_abort(dsi); 707 sun6i_dsi_inst_commit(dsi); 708 709 if (func == DSI_START_HSC) 710 regmap_write_bits(dsi->regs, 711 SUN6I_DSI_INST_FUNC_REG(DSI_INST_ID_LP11), 712 SUN6I_DSI_INST_FUNC_LANE_CEN, 0); 713 714 return 0; 715 } 716 717 static void sun6i_dsi_encoder_enable(struct drm_encoder *encoder) 718 { 719 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; 720 struct sun6i_dsi *dsi = encoder_to_sun6i_dsi(encoder); 721 struct mipi_dsi_device *device = dsi->device; 722 union phy_configure_opts opts = { 0 }; 723 struct phy_configure_opts_mipi_dphy *cfg = &opts.mipi_dphy; 724 u16 delay; 725 726 DRM_DEBUG_DRIVER("Enabling DSI output\n"); 727 728 pm_runtime_get_sync(dsi->dev); 729 730 delay = sun6i_dsi_get_video_start_delay(dsi, mode); 731 regmap_write(dsi->regs, SUN6I_DSI_BASIC_CTL1_REG, 732 SUN6I_DSI_BASIC_CTL1_VIDEO_ST_DELAY(delay) | 733 SUN6I_DSI_BASIC_CTL1_VIDEO_FILL | 734 SUN6I_DSI_BASIC_CTL1_VIDEO_PRECISION | 735 SUN6I_DSI_BASIC_CTL1_VIDEO_MODE); 736 737 sun6i_dsi_setup_burst(dsi, mode); 738 sun6i_dsi_setup_inst_loop(dsi, mode); 739 sun6i_dsi_setup_format(dsi, mode); 740 sun6i_dsi_setup_timings(dsi, mode); 741 742 phy_init(dsi->dphy); 743 744 phy_mipi_dphy_get_default_config(mode->clock * 1000, 745 mipi_dsi_pixel_format_to_bpp(device->format), 746 device->lanes, cfg); 747 748 phy_set_mode(dsi->dphy, PHY_MODE_MIPI_DPHY); 749 phy_configure(dsi->dphy, &opts); 750 phy_power_on(dsi->dphy); 751 752 if (!IS_ERR(dsi->panel)) 753 drm_panel_prepare(dsi->panel); 754 755 /* 756 * FIXME: This should be moved after the switch to HS mode. 757 * 758 * Unfortunately, once in HS mode, it seems like we're not 759 * able to send DCS commands anymore, which would prevent any 760 * panel to send any DCS command as part as their enable 761 * method, which is quite common. 762 * 763 * I haven't seen any artifact due to that sub-optimal 764 * ordering on the panels I've tested it with, so I guess this 765 * will do for now, until that IP is better understood. 766 */ 767 if (!IS_ERR(dsi->panel)) 768 drm_panel_enable(dsi->panel); 769 770 sun6i_dsi_start(dsi, DSI_START_HSC); 771 772 udelay(1000); 773 774 sun6i_dsi_start(dsi, DSI_START_HSD); 775 } 776 777 static void sun6i_dsi_encoder_disable(struct drm_encoder *encoder) 778 { 779 struct sun6i_dsi *dsi = encoder_to_sun6i_dsi(encoder); 780 781 DRM_DEBUG_DRIVER("Disabling DSI output\n"); 782 783 if (!IS_ERR(dsi->panel)) { 784 drm_panel_disable(dsi->panel); 785 drm_panel_unprepare(dsi->panel); 786 } 787 788 phy_power_off(dsi->dphy); 789 phy_exit(dsi->dphy); 790 791 pm_runtime_put(dsi->dev); 792 } 793 794 static int sun6i_dsi_get_modes(struct drm_connector *connector) 795 { 796 struct sun6i_dsi *dsi = connector_to_sun6i_dsi(connector); 797 798 return drm_panel_get_modes(dsi->panel); 799 } 800 801 static struct drm_connector_helper_funcs sun6i_dsi_connector_helper_funcs = { 802 .get_modes = sun6i_dsi_get_modes, 803 }; 804 805 static enum drm_connector_status 806 sun6i_dsi_connector_detect(struct drm_connector *connector, bool force) 807 { 808 return connector_status_connected; 809 } 810 811 static const struct drm_connector_funcs sun6i_dsi_connector_funcs = { 812 .detect = sun6i_dsi_connector_detect, 813 .fill_modes = drm_helper_probe_single_connector_modes, 814 .destroy = drm_connector_cleanup, 815 .reset = drm_atomic_helper_connector_reset, 816 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 817 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 818 }; 819 820 static const struct drm_encoder_helper_funcs sun6i_dsi_enc_helper_funcs = { 821 .disable = sun6i_dsi_encoder_disable, 822 .enable = sun6i_dsi_encoder_enable, 823 }; 824 825 static const struct drm_encoder_funcs sun6i_dsi_enc_funcs = { 826 .destroy = drm_encoder_cleanup, 827 }; 828 829 static u32 sun6i_dsi_dcs_build_pkt_hdr(struct sun6i_dsi *dsi, 830 const struct mipi_dsi_msg *msg) 831 { 832 u32 pkt = msg->type; 833 834 if (msg->type == MIPI_DSI_DCS_LONG_WRITE) { 835 pkt |= ((msg->tx_len) & 0xffff) << 8; 836 pkt |= (((msg->tx_len) >> 8) & 0xffff) << 16; 837 } else { 838 pkt |= (((u8 *)msg->tx_buf)[0] << 8); 839 if (msg->tx_len > 1) 840 pkt |= (((u8 *)msg->tx_buf)[1] << 16); 841 } 842 843 pkt |= sun6i_dsi_ecc_compute(pkt) << 24; 844 845 return pkt; 846 } 847 848 static int sun6i_dsi_dcs_write_short(struct sun6i_dsi *dsi, 849 const struct mipi_dsi_msg *msg) 850 { 851 regmap_write(dsi->regs, SUN6I_DSI_CMD_TX_REG(0), 852 sun6i_dsi_dcs_build_pkt_hdr(dsi, msg)); 853 regmap_write_bits(dsi->regs, SUN6I_DSI_CMD_CTL_REG, 854 0xff, (4 - 1)); 855 856 sun6i_dsi_start(dsi, DSI_START_LPTX); 857 858 return msg->tx_len; 859 } 860 861 static int sun6i_dsi_dcs_write_long(struct sun6i_dsi *dsi, 862 const struct mipi_dsi_msg *msg) 863 { 864 int ret, len = 0; 865 u8 *bounce; 866 u16 crc; 867 868 regmap_write(dsi->regs, SUN6I_DSI_CMD_TX_REG(0), 869 sun6i_dsi_dcs_build_pkt_hdr(dsi, msg)); 870 871 bounce = kzalloc(msg->tx_len + sizeof(crc), GFP_KERNEL); 872 if (!bounce) 873 return -ENOMEM; 874 875 memcpy(bounce, msg->tx_buf, msg->tx_len); 876 len += msg->tx_len; 877 878 crc = sun6i_dsi_crc_compute(bounce, msg->tx_len); 879 memcpy((u8 *)bounce + msg->tx_len, &crc, sizeof(crc)); 880 len += sizeof(crc); 881 882 regmap_bulk_write(dsi->regs, SUN6I_DSI_CMD_TX_REG(1), bounce, len); 883 regmap_write(dsi->regs, SUN6I_DSI_CMD_CTL_REG, len + 4 - 1); 884 kfree(bounce); 885 886 sun6i_dsi_start(dsi, DSI_START_LPTX); 887 888 ret = sun6i_dsi_inst_wait_for_completion(dsi); 889 if (ret < 0) { 890 sun6i_dsi_inst_abort(dsi); 891 return ret; 892 } 893 894 /* 895 * TODO: There's some bits (reg 0x200, bits 8/9) that 896 * apparently can be used to check whether the data have been 897 * sent, but I couldn't get it to work reliably. 898 */ 899 return msg->tx_len; 900 } 901 902 static int sun6i_dsi_dcs_read(struct sun6i_dsi *dsi, 903 const struct mipi_dsi_msg *msg) 904 { 905 u32 val; 906 int ret; 907 u8 byte0; 908 909 regmap_write(dsi->regs, SUN6I_DSI_CMD_TX_REG(0), 910 sun6i_dsi_dcs_build_pkt_hdr(dsi, msg)); 911 regmap_write(dsi->regs, SUN6I_DSI_CMD_CTL_REG, 912 (4 - 1)); 913 914 sun6i_dsi_start(dsi, DSI_START_LPRX); 915 916 ret = sun6i_dsi_inst_wait_for_completion(dsi); 917 if (ret < 0) { 918 sun6i_dsi_inst_abort(dsi); 919 return ret; 920 } 921 922 /* 923 * TODO: There's some bits (reg 0x200, bits 24/25) that 924 * apparently can be used to check whether the data have been 925 * received, but I couldn't get it to work reliably. 926 */ 927 regmap_read(dsi->regs, SUN6I_DSI_CMD_CTL_REG, &val); 928 if (val & SUN6I_DSI_CMD_CTL_RX_OVERFLOW) 929 return -EIO; 930 931 regmap_read(dsi->regs, SUN6I_DSI_CMD_RX_REG(0), &val); 932 byte0 = val & 0xff; 933 if (byte0 == MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT) 934 return -EIO; 935 936 ((u8 *)msg->rx_buf)[0] = (val >> 8); 937 938 return 1; 939 } 940 941 static int sun6i_dsi_attach(struct mipi_dsi_host *host, 942 struct mipi_dsi_device *device) 943 { 944 struct sun6i_dsi *dsi = host_to_sun6i_dsi(host); 945 946 dsi->device = device; 947 dsi->panel = of_drm_find_panel(device->dev.of_node); 948 if (IS_ERR(dsi->panel)) 949 return PTR_ERR(dsi->panel); 950 951 dev_info(host->dev, "Attached device %s\n", device->name); 952 953 return 0; 954 } 955 956 static int sun6i_dsi_detach(struct mipi_dsi_host *host, 957 struct mipi_dsi_device *device) 958 { 959 struct sun6i_dsi *dsi = host_to_sun6i_dsi(host); 960 961 dsi->panel = NULL; 962 dsi->device = NULL; 963 964 return 0; 965 } 966 967 static ssize_t sun6i_dsi_transfer(struct mipi_dsi_host *host, 968 const struct mipi_dsi_msg *msg) 969 { 970 struct sun6i_dsi *dsi = host_to_sun6i_dsi(host); 971 int ret; 972 973 ret = sun6i_dsi_inst_wait_for_completion(dsi); 974 if (ret < 0) 975 sun6i_dsi_inst_abort(dsi); 976 977 regmap_write(dsi->regs, SUN6I_DSI_CMD_CTL_REG, 978 SUN6I_DSI_CMD_CTL_RX_OVERFLOW | 979 SUN6I_DSI_CMD_CTL_RX_FLAG | 980 SUN6I_DSI_CMD_CTL_TX_FLAG); 981 982 switch (msg->type) { 983 case MIPI_DSI_DCS_SHORT_WRITE: 984 case MIPI_DSI_DCS_SHORT_WRITE_PARAM: 985 case MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM: 986 ret = sun6i_dsi_dcs_write_short(dsi, msg); 987 break; 988 989 case MIPI_DSI_DCS_LONG_WRITE: 990 ret = sun6i_dsi_dcs_write_long(dsi, msg); 991 break; 992 993 case MIPI_DSI_DCS_READ: 994 if (msg->rx_len == 1) { 995 ret = sun6i_dsi_dcs_read(dsi, msg); 996 break; 997 } 998 /* Else, fall through */ 999 1000 default: 1001 ret = -EINVAL; 1002 } 1003 1004 return ret; 1005 } 1006 1007 static const struct mipi_dsi_host_ops sun6i_dsi_host_ops = { 1008 .attach = sun6i_dsi_attach, 1009 .detach = sun6i_dsi_detach, 1010 .transfer = sun6i_dsi_transfer, 1011 }; 1012 1013 static const struct regmap_config sun6i_dsi_regmap_config = { 1014 .reg_bits = 32, 1015 .val_bits = 32, 1016 .reg_stride = 4, 1017 .max_register = SUN6I_DSI_CMD_TX_REG(255), 1018 .name = "mipi-dsi", 1019 }; 1020 1021 static int sun6i_dsi_bind(struct device *dev, struct device *master, 1022 void *data) 1023 { 1024 struct drm_device *drm = data; 1025 struct sun4i_drv *drv = drm->dev_private; 1026 struct sun6i_dsi *dsi = dev_get_drvdata(dev); 1027 int ret; 1028 1029 if (!dsi->panel) 1030 return -EPROBE_DEFER; 1031 1032 dsi->drv = drv; 1033 1034 drm_encoder_helper_add(&dsi->encoder, 1035 &sun6i_dsi_enc_helper_funcs); 1036 ret = drm_encoder_init(drm, 1037 &dsi->encoder, 1038 &sun6i_dsi_enc_funcs, 1039 DRM_MODE_ENCODER_DSI, 1040 NULL); 1041 if (ret) { 1042 dev_err(dsi->dev, "Couldn't initialise the DSI encoder\n"); 1043 return ret; 1044 } 1045 dsi->encoder.possible_crtcs = BIT(0); 1046 1047 drm_connector_helper_add(&dsi->connector, 1048 &sun6i_dsi_connector_helper_funcs); 1049 ret = drm_connector_init(drm, &dsi->connector, 1050 &sun6i_dsi_connector_funcs, 1051 DRM_MODE_CONNECTOR_DSI); 1052 if (ret) { 1053 dev_err(dsi->dev, 1054 "Couldn't initialise the DSI connector\n"); 1055 goto err_cleanup_connector; 1056 } 1057 1058 drm_connector_attach_encoder(&dsi->connector, &dsi->encoder); 1059 drm_panel_attach(dsi->panel, &dsi->connector); 1060 1061 return 0; 1062 1063 err_cleanup_connector: 1064 drm_encoder_cleanup(&dsi->encoder); 1065 return ret; 1066 } 1067 1068 static void sun6i_dsi_unbind(struct device *dev, struct device *master, 1069 void *data) 1070 { 1071 struct sun6i_dsi *dsi = dev_get_drvdata(dev); 1072 1073 drm_panel_detach(dsi->panel); 1074 } 1075 1076 static const struct component_ops sun6i_dsi_ops = { 1077 .bind = sun6i_dsi_bind, 1078 .unbind = sun6i_dsi_unbind, 1079 }; 1080 1081 static int sun6i_dsi_probe(struct platform_device *pdev) 1082 { 1083 struct device *dev = &pdev->dev; 1084 struct sun6i_dsi *dsi; 1085 struct resource *res; 1086 void __iomem *base; 1087 int ret; 1088 1089 dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); 1090 if (!dsi) 1091 return -ENOMEM; 1092 dev_set_drvdata(dev, dsi); 1093 dsi->dev = dev; 1094 dsi->host.ops = &sun6i_dsi_host_ops; 1095 dsi->host.dev = dev; 1096 1097 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1098 base = devm_ioremap_resource(dev, res); 1099 if (IS_ERR(base)) { 1100 dev_err(dev, "Couldn't map the DSI encoder registers\n"); 1101 return PTR_ERR(base); 1102 } 1103 1104 dsi->regulator = devm_regulator_get(dev, "vcc-dsi"); 1105 if (IS_ERR(dsi->regulator)) { 1106 dev_err(dev, "Couldn't get VCC-DSI supply\n"); 1107 return PTR_ERR(dsi->regulator); 1108 } 1109 1110 dsi->regs = devm_regmap_init_mmio_clk(dev, "bus", base, 1111 &sun6i_dsi_regmap_config); 1112 if (IS_ERR(dsi->regs)) { 1113 dev_err(dev, "Couldn't create the DSI encoder regmap\n"); 1114 return PTR_ERR(dsi->regs); 1115 } 1116 1117 dsi->reset = devm_reset_control_get_shared(dev, NULL); 1118 if (IS_ERR(dsi->reset)) { 1119 dev_err(dev, "Couldn't get our reset line\n"); 1120 return PTR_ERR(dsi->reset); 1121 } 1122 1123 dsi->mod_clk = devm_clk_get(dev, "mod"); 1124 if (IS_ERR(dsi->mod_clk)) { 1125 dev_err(dev, "Couldn't get the DSI mod clock\n"); 1126 return PTR_ERR(dsi->mod_clk); 1127 } 1128 1129 /* 1130 * In order to operate properly, that clock seems to be always 1131 * set to 297MHz. 1132 */ 1133 clk_set_rate_exclusive(dsi->mod_clk, 297000000); 1134 1135 dsi->dphy = devm_phy_get(dev, "dphy"); 1136 if (IS_ERR(dsi->dphy)) { 1137 dev_err(dev, "Couldn't get the MIPI D-PHY\n"); 1138 ret = PTR_ERR(dsi->dphy); 1139 goto err_unprotect_clk; 1140 } 1141 1142 pm_runtime_enable(dev); 1143 1144 ret = mipi_dsi_host_register(&dsi->host); 1145 if (ret) { 1146 dev_err(dev, "Couldn't register MIPI-DSI host\n"); 1147 goto err_pm_disable; 1148 } 1149 1150 ret = component_add(&pdev->dev, &sun6i_dsi_ops); 1151 if (ret) { 1152 dev_err(dev, "Couldn't register our component\n"); 1153 goto err_remove_dsi_host; 1154 } 1155 1156 return 0; 1157 1158 err_remove_dsi_host: 1159 mipi_dsi_host_unregister(&dsi->host); 1160 err_pm_disable: 1161 pm_runtime_disable(dev); 1162 err_unprotect_clk: 1163 clk_rate_exclusive_put(dsi->mod_clk); 1164 return ret; 1165 } 1166 1167 static int sun6i_dsi_remove(struct platform_device *pdev) 1168 { 1169 struct device *dev = &pdev->dev; 1170 struct sun6i_dsi *dsi = dev_get_drvdata(dev); 1171 1172 component_del(&pdev->dev, &sun6i_dsi_ops); 1173 mipi_dsi_host_unregister(&dsi->host); 1174 pm_runtime_disable(dev); 1175 clk_rate_exclusive_put(dsi->mod_clk); 1176 1177 return 0; 1178 } 1179 1180 static int __maybe_unused sun6i_dsi_runtime_resume(struct device *dev) 1181 { 1182 struct sun6i_dsi *dsi = dev_get_drvdata(dev); 1183 int err; 1184 1185 err = regulator_enable(dsi->regulator); 1186 if (err) { 1187 dev_err(dsi->dev, "failed to enable VCC-DSI supply: %d\n", err); 1188 return err; 1189 } 1190 1191 reset_control_deassert(dsi->reset); 1192 clk_prepare_enable(dsi->mod_clk); 1193 1194 /* 1195 * Enable the DSI block. 1196 * 1197 * Some part of it can only be done once we get a number of 1198 * lanes, see sun6i_dsi_inst_init 1199 */ 1200 regmap_write(dsi->regs, SUN6I_DSI_CTL_REG, SUN6I_DSI_CTL_EN); 1201 1202 regmap_write(dsi->regs, SUN6I_DSI_BASIC_CTL0_REG, 1203 SUN6I_DSI_BASIC_CTL0_ECC_EN | SUN6I_DSI_BASIC_CTL0_CRC_EN); 1204 1205 regmap_write(dsi->regs, SUN6I_DSI_TRANS_START_REG, 10); 1206 regmap_write(dsi->regs, SUN6I_DSI_TRANS_ZERO_REG, 0); 1207 1208 if (dsi->device) 1209 sun6i_dsi_inst_init(dsi, dsi->device); 1210 1211 regmap_write(dsi->regs, SUN6I_DSI_DEBUG_DATA_REG, 0xff); 1212 1213 return 0; 1214 } 1215 1216 static int __maybe_unused sun6i_dsi_runtime_suspend(struct device *dev) 1217 { 1218 struct sun6i_dsi *dsi = dev_get_drvdata(dev); 1219 1220 clk_disable_unprepare(dsi->mod_clk); 1221 reset_control_assert(dsi->reset); 1222 regulator_disable(dsi->regulator); 1223 1224 return 0; 1225 } 1226 1227 static const struct dev_pm_ops sun6i_dsi_pm_ops = { 1228 SET_RUNTIME_PM_OPS(sun6i_dsi_runtime_suspend, 1229 sun6i_dsi_runtime_resume, 1230 NULL) 1231 }; 1232 1233 static const struct of_device_id sun6i_dsi_of_table[] = { 1234 { .compatible = "allwinner,sun6i-a31-mipi-dsi" }, 1235 { } 1236 }; 1237 MODULE_DEVICE_TABLE(of, sun6i_dsi_of_table); 1238 1239 static struct platform_driver sun6i_dsi_platform_driver = { 1240 .probe = sun6i_dsi_probe, 1241 .remove = sun6i_dsi_remove, 1242 .driver = { 1243 .name = "sun6i-mipi-dsi", 1244 .of_match_table = sun6i_dsi_of_table, 1245 .pm = &sun6i_dsi_pm_ops, 1246 }, 1247 }; 1248 module_platform_driver(sun6i_dsi_platform_driver); 1249 1250 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>"); 1251 MODULE_DESCRIPTION("Allwinner A31 DSI Driver"); 1252 MODULE_LICENSE("GPL"); 1253