1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright 2022 Advanced Micro Devices, Inc. 4 * 5 * Permission is hereby granted, free of charge, to any person obtaining a 6 * copy of this software and associated documentation files (the "Software"), 7 * to deal in the Software without restriction, including without limitation 8 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 9 * and/or sell copies of the Software, and to permit persons to whom the 10 * Software is furnished to do so, subject to the following conditions: 11 * 12 * The above copyright notice and this permission notice shall be included in 13 * all copies or substantial portions of the Software. 14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 18 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 19 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 20 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 21 * OTHER DEALINGS IN THE SOFTWARE. 22 * 23 * Authors: AMD 24 * 25 */ 26 27 #include "reg_helper.h" 28 #include "core_types.h" 29 30 #include "dcn31/dcn31_dccg.h" 31 #include "dcn314_dccg.h" 32 33 #define TO_DCN_DCCG(dccg)\ 34 container_of(dccg, struct dcn_dccg, base) 35 36 #define REG(reg) \ 37 (dccg_dcn->regs->reg) 38 39 #undef FN 40 #define FN(reg_name, field_name) \ 41 dccg_dcn->dccg_shift->field_name, dccg_dcn->dccg_mask->field_name 42 43 #define CTX \ 44 dccg_dcn->base.ctx 45 #define DC_LOGGER \ 46 dccg->ctx->logger 47 48 static void dccg314_get_pixel_rate_div( 49 struct dccg *dccg, 50 uint32_t otg_inst, 51 enum pixel_rate_div *k1, 52 enum pixel_rate_div *k2) 53 { 54 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 55 uint32_t val_k1 = PIXEL_RATE_DIV_NA, val_k2 = PIXEL_RATE_DIV_NA; 56 57 *k1 = PIXEL_RATE_DIV_NA; 58 *k2 = PIXEL_RATE_DIV_NA; 59 60 switch (otg_inst) { 61 case 0: 62 REG_GET_2(OTG_PIXEL_RATE_DIV, 63 OTG0_PIXEL_RATE_DIVK1, &val_k1, 64 OTG0_PIXEL_RATE_DIVK2, &val_k2); 65 break; 66 case 1: 67 REG_GET_2(OTG_PIXEL_RATE_DIV, 68 OTG1_PIXEL_RATE_DIVK1, &val_k1, 69 OTG1_PIXEL_RATE_DIVK2, &val_k2); 70 break; 71 case 2: 72 REG_GET_2(OTG_PIXEL_RATE_DIV, 73 OTG2_PIXEL_RATE_DIVK1, &val_k1, 74 OTG2_PIXEL_RATE_DIVK2, &val_k2); 75 break; 76 case 3: 77 REG_GET_2(OTG_PIXEL_RATE_DIV, 78 OTG3_PIXEL_RATE_DIVK1, &val_k1, 79 OTG3_PIXEL_RATE_DIVK2, &val_k2); 80 break; 81 default: 82 BREAK_TO_DEBUGGER(); 83 return; 84 } 85 86 *k1 = (enum pixel_rate_div)val_k1; 87 *k2 = (enum pixel_rate_div)val_k2; 88 } 89 90 static void dccg314_set_pixel_rate_div( 91 struct dccg *dccg, 92 uint32_t otg_inst, 93 enum pixel_rate_div k1, 94 enum pixel_rate_div k2) 95 { 96 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 97 enum pixel_rate_div cur_k1 = PIXEL_RATE_DIV_NA, cur_k2 = PIXEL_RATE_DIV_NA; 98 99 // Don't program 0xF into the register field. Not valid since 100 // K1 / K2 field is only 1 / 2 bits wide 101 if (k1 == PIXEL_RATE_DIV_NA || k2 == PIXEL_RATE_DIV_NA) { 102 BREAK_TO_DEBUGGER(); 103 return; 104 } 105 106 dccg314_get_pixel_rate_div(dccg, otg_inst, &cur_k1, &cur_k2); 107 if (k1 == cur_k1 && k2 == cur_k2) 108 return; 109 110 switch (otg_inst) { 111 case 0: 112 REG_UPDATE_2(OTG_PIXEL_RATE_DIV, 113 OTG0_PIXEL_RATE_DIVK1, k1, 114 OTG0_PIXEL_RATE_DIVK2, k2); 115 break; 116 case 1: 117 REG_UPDATE_2(OTG_PIXEL_RATE_DIV, 118 OTG1_PIXEL_RATE_DIVK1, k1, 119 OTG1_PIXEL_RATE_DIVK2, k2); 120 break; 121 case 2: 122 REG_UPDATE_2(OTG_PIXEL_RATE_DIV, 123 OTG2_PIXEL_RATE_DIVK1, k1, 124 OTG2_PIXEL_RATE_DIVK2, k2); 125 break; 126 case 3: 127 REG_UPDATE_2(OTG_PIXEL_RATE_DIV, 128 OTG3_PIXEL_RATE_DIVK1, k1, 129 OTG3_PIXEL_RATE_DIVK2, k2); 130 break; 131 default: 132 BREAK_TO_DEBUGGER(); 133 return; 134 } 135 } 136 137 static void dccg314_set_dtbclk_p_src( 138 struct dccg *dccg, 139 enum streamclk_source src, 140 uint32_t otg_inst) 141 { 142 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 143 144 uint32_t p_src_sel = 0; /* selects dprefclk */ 145 146 if (src == DTBCLK0) 147 p_src_sel = 2; /* selects dtbclk0 */ 148 149 switch (otg_inst) { 150 case 0: 151 if (src == REFCLK) 152 REG_UPDATE(DTBCLK_P_CNTL, 153 DTBCLK_P0_EN, 0); 154 else 155 REG_UPDATE_2(DTBCLK_P_CNTL, 156 DTBCLK_P0_SRC_SEL, p_src_sel, 157 DTBCLK_P0_EN, 1); 158 break; 159 case 1: 160 if (src == REFCLK) 161 REG_UPDATE(DTBCLK_P_CNTL, 162 DTBCLK_P1_EN, 0); 163 else 164 REG_UPDATE_2(DTBCLK_P_CNTL, 165 DTBCLK_P1_SRC_SEL, p_src_sel, 166 DTBCLK_P1_EN, 1); 167 break; 168 case 2: 169 if (src == REFCLK) 170 REG_UPDATE(DTBCLK_P_CNTL, 171 DTBCLK_P2_EN, 0); 172 else 173 REG_UPDATE_2(DTBCLK_P_CNTL, 174 DTBCLK_P2_SRC_SEL, p_src_sel, 175 DTBCLK_P2_EN, 1); 176 break; 177 case 3: 178 if (src == REFCLK) 179 REG_UPDATE(DTBCLK_P_CNTL, 180 DTBCLK_P3_EN, 0); 181 else 182 REG_UPDATE_2(DTBCLK_P_CNTL, 183 DTBCLK_P3_SRC_SEL, p_src_sel, 184 DTBCLK_P3_EN, 1); 185 break; 186 default: 187 BREAK_TO_DEBUGGER(); 188 return; 189 } 190 191 } 192 193 /* Controls the generation of pixel valid for OTG in (OTG -> HPO case) */ 194 static void dccg314_set_dtbclk_dto( 195 struct dccg *dccg, 196 const struct dtbclk_dto_params *params) 197 { 198 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 199 /* DTO Output Rate / Pixel Rate = 1/4 */ 200 int req_dtbclk_khz = params->pixclk_khz / 4; 201 202 if (params->ref_dtbclk_khz && req_dtbclk_khz) { 203 uint32_t modulo, phase; 204 205 // phase / modulo = dtbclk / dtbclk ref 206 modulo = params->ref_dtbclk_khz * 1000; 207 phase = req_dtbclk_khz * 1000; 208 209 REG_WRITE(DTBCLK_DTO_MODULO[params->otg_inst], modulo); 210 REG_WRITE(DTBCLK_DTO_PHASE[params->otg_inst], phase); 211 212 REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst], 213 DTBCLK_DTO_ENABLE[params->otg_inst], 1); 214 215 REG_WAIT(OTG_PIXEL_RATE_CNTL[params->otg_inst], 216 DTBCLKDTO_ENABLE_STATUS[params->otg_inst], 1, 217 1, 100); 218 219 /* program OTG_PIXEL_RATE_DIV for DIVK1 and DIVK2 fields */ 220 dccg314_set_pixel_rate_div(dccg, params->otg_inst, PIXEL_RATE_DIV_BY_1, PIXEL_RATE_DIV_BY_1); 221 222 /* The recommended programming sequence to enable DTBCLK DTO to generate 223 * valid pixel HPO DPSTREAM ENCODER, specifies that DTO source select should 224 * be set only after DTO is enabled 225 */ 226 REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst], 227 PIPE_DTO_SRC_SEL[params->otg_inst], 2); 228 } else { 229 REG_UPDATE_2(OTG_PIXEL_RATE_CNTL[params->otg_inst], 230 DTBCLK_DTO_ENABLE[params->otg_inst], 0, 231 PIPE_DTO_SRC_SEL[params->otg_inst], 1); 232 233 REG_WRITE(DTBCLK_DTO_MODULO[params->otg_inst], 0); 234 REG_WRITE(DTBCLK_DTO_PHASE[params->otg_inst], 0); 235 } 236 } 237 238 static void dccg314_set_dpstreamclk( 239 struct dccg *dccg, 240 enum streamclk_source src, 241 int otg_inst, 242 int dp_hpo_inst) 243 { 244 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 245 246 /* set the dtbclk_p source */ 247 dccg314_set_dtbclk_p_src(dccg, src, otg_inst); 248 249 /* enabled to select one of the DTBCLKs for pipe */ 250 switch (dp_hpo_inst) { 251 case 0: 252 REG_UPDATE_2(DPSTREAMCLK_CNTL, 253 DPSTREAMCLK0_EN, (src == REFCLK) ? 0 : 1, 254 DPSTREAMCLK0_SRC_SEL, otg_inst); 255 break; 256 case 1: 257 REG_UPDATE_2(DPSTREAMCLK_CNTL, 258 DPSTREAMCLK1_EN, (src == REFCLK) ? 0 : 1, 259 DPSTREAMCLK1_SRC_SEL, otg_inst); 260 break; 261 case 2: 262 REG_UPDATE_2(DPSTREAMCLK_CNTL, 263 DPSTREAMCLK2_EN, (src == REFCLK) ? 0 : 1, 264 DPSTREAMCLK2_SRC_SEL, otg_inst); 265 break; 266 case 3: 267 REG_UPDATE_2(DPSTREAMCLK_CNTL, 268 DPSTREAMCLK3_EN, (src == REFCLK) ? 0 : 1, 269 DPSTREAMCLK3_SRC_SEL, otg_inst); 270 break; 271 default: 272 BREAK_TO_DEBUGGER(); 273 return; 274 } 275 } 276 277 static void dccg314_set_valid_pixel_rate( 278 struct dccg *dccg, 279 int ref_dtbclk_khz, 280 int otg_inst, 281 int pixclk_khz) 282 { 283 struct dtbclk_dto_params dto_params = {0}; 284 285 dto_params.ref_dtbclk_khz = ref_dtbclk_khz; 286 dto_params.otg_inst = otg_inst; 287 dto_params.pixclk_khz = pixclk_khz; 288 289 dccg314_set_dtbclk_dto(dccg, &dto_params); 290 } 291 292 static void dccg314_dpp_root_clock_control( 293 struct dccg *dccg, 294 unsigned int dpp_inst, 295 bool clock_on) 296 { 297 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 298 299 if (clock_on) { 300 /* turn off the DTO and leave phase/modulo at max */ 301 REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_ENABLE[dpp_inst], 0); 302 REG_SET_2(DPPCLK_DTO_PARAM[dpp_inst], 0, 303 DPPCLK0_DTO_PHASE, 0xFF, 304 DPPCLK0_DTO_MODULO, 0xFF); 305 } else { 306 /* turn on the DTO to generate a 0hz clock */ 307 REG_UPDATE(DPPCLK_DTO_CTRL, DPPCLK_DTO_ENABLE[dpp_inst], 1); 308 REG_SET_2(DPPCLK_DTO_PARAM[dpp_inst], 0, 309 DPPCLK0_DTO_PHASE, 0, 310 DPPCLK0_DTO_MODULO, 1); 311 } 312 } 313 314 static const struct dccg_funcs dccg314_funcs = { 315 .update_dpp_dto = dccg31_update_dpp_dto, 316 .dpp_root_clock_control = dccg314_dpp_root_clock_control, 317 .get_dccg_ref_freq = dccg31_get_dccg_ref_freq, 318 .dccg_init = dccg31_init, 319 .set_dpstreamclk = dccg314_set_dpstreamclk, 320 .enable_symclk32_se = dccg31_enable_symclk32_se, 321 .disable_symclk32_se = dccg31_disable_symclk32_se, 322 .enable_symclk32_le = dccg31_enable_symclk32_le, 323 .disable_symclk32_le = dccg31_disable_symclk32_le, 324 .set_physymclk = dccg31_set_physymclk, 325 .set_dtbclk_dto = dccg314_set_dtbclk_dto, 326 .set_audio_dtbclk_dto = dccg31_set_audio_dtbclk_dto, 327 .set_fifo_errdet_ovr_en = dccg2_set_fifo_errdet_ovr_en, 328 .otg_add_pixel = dccg31_otg_add_pixel, 329 .otg_drop_pixel = dccg31_otg_drop_pixel, 330 .set_dispclk_change_mode = dccg31_set_dispclk_change_mode, 331 .disable_dsc = dccg31_disable_dscclk, 332 .enable_dsc = dccg31_enable_dscclk, 333 .set_pixel_rate_div = dccg314_set_pixel_rate_div, 334 .set_valid_pixel_rate = dccg314_set_valid_pixel_rate, 335 }; 336 337 struct dccg *dccg314_create( 338 struct dc_context *ctx, 339 const struct dccg_registers *regs, 340 const struct dccg_shift *dccg_shift, 341 const struct dccg_mask *dccg_mask) 342 { 343 struct dcn_dccg *dccg_dcn = kzalloc(sizeof(*dccg_dcn), GFP_KERNEL); 344 struct dccg *base; 345 346 if (dccg_dcn == NULL) { 347 BREAK_TO_DEBUGGER(); 348 return NULL; 349 } 350 351 base = &dccg_dcn->base; 352 base->ctx = ctx; 353 base->funcs = &dccg314_funcs; 354 355 dccg_dcn->regs = regs; 356 dccg_dcn->dccg_shift = dccg_shift; 357 dccg_dcn->dccg_mask = dccg_mask; 358 359 return &dccg_dcn->base; 360 } 361