1 /* 2 * Copyright 2021 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: AMD 23 * 24 */ 25 26 #include "reg_helper.h" 27 #include "core_types.h" 28 #include "dcn32_dccg.h" 29 30 #define TO_DCN_DCCG(dccg)\ 31 container_of(dccg, struct dcn_dccg, base) 32 33 #define REG(reg) \ 34 (dccg_dcn->regs->reg) 35 36 #undef FN 37 #define FN(reg_name, field_name) \ 38 dccg_dcn->dccg_shift->field_name, dccg_dcn->dccg_mask->field_name 39 40 #define CTX \ 41 dccg_dcn->base.ctx 42 #define DC_LOGGER \ 43 dccg->ctx->logger 44 45 static void dccg32_get_pixel_rate_div( 46 struct dccg *dccg, 47 uint32_t otg_inst, 48 enum pixel_rate_div *k1, 49 enum pixel_rate_div *k2) 50 { 51 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 52 uint32_t val_k1 = PIXEL_RATE_DIV_NA, val_k2 = PIXEL_RATE_DIV_NA; 53 54 *k1 = PIXEL_RATE_DIV_NA; 55 *k2 = PIXEL_RATE_DIV_NA; 56 57 switch (otg_inst) { 58 case 0: 59 REG_GET_2(OTG_PIXEL_RATE_DIV, 60 OTG0_PIXEL_RATE_DIVK1, &val_k1, 61 OTG0_PIXEL_RATE_DIVK2, &val_k2); 62 break; 63 case 1: 64 REG_GET_2(OTG_PIXEL_RATE_DIV, 65 OTG1_PIXEL_RATE_DIVK1, &val_k1, 66 OTG1_PIXEL_RATE_DIVK2, &val_k2); 67 break; 68 case 2: 69 REG_GET_2(OTG_PIXEL_RATE_DIV, 70 OTG2_PIXEL_RATE_DIVK1, &val_k1, 71 OTG2_PIXEL_RATE_DIVK2, &val_k2); 72 break; 73 case 3: 74 REG_GET_2(OTG_PIXEL_RATE_DIV, 75 OTG3_PIXEL_RATE_DIVK1, &val_k1, 76 OTG3_PIXEL_RATE_DIVK2, &val_k2); 77 break; 78 default: 79 BREAK_TO_DEBUGGER(); 80 return; 81 } 82 83 *k1 = (enum pixel_rate_div)val_k1; 84 *k2 = (enum pixel_rate_div)val_k2; 85 } 86 87 static void dccg32_set_pixel_rate_div( 88 struct dccg *dccg, 89 uint32_t otg_inst, 90 enum pixel_rate_div k1, 91 enum pixel_rate_div k2) 92 { 93 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 94 95 enum pixel_rate_div cur_k1 = PIXEL_RATE_DIV_NA, cur_k2 = PIXEL_RATE_DIV_NA; 96 97 // Don't program 0xF into the register field. Not valid since 98 // K1 / K2 field is only 1 / 2 bits wide 99 if (k1 == PIXEL_RATE_DIV_NA || k2 == PIXEL_RATE_DIV_NA) { 100 BREAK_TO_DEBUGGER(); 101 return; 102 } 103 104 dccg32_get_pixel_rate_div(dccg, otg_inst, &cur_k1, &cur_k2); 105 if (k1 == cur_k1 && k2 == cur_k2) 106 return; 107 108 switch (otg_inst) { 109 case 0: 110 REG_UPDATE_2(OTG_PIXEL_RATE_DIV, 111 OTG0_PIXEL_RATE_DIVK1, k1, 112 OTG0_PIXEL_RATE_DIVK2, k2); 113 break; 114 case 1: 115 REG_UPDATE_2(OTG_PIXEL_RATE_DIV, 116 OTG1_PIXEL_RATE_DIVK1, k1, 117 OTG1_PIXEL_RATE_DIVK2, k2); 118 break; 119 case 2: 120 REG_UPDATE_2(OTG_PIXEL_RATE_DIV, 121 OTG2_PIXEL_RATE_DIVK1, k1, 122 OTG2_PIXEL_RATE_DIVK2, k2); 123 break; 124 case 3: 125 REG_UPDATE_2(OTG_PIXEL_RATE_DIV, 126 OTG3_PIXEL_RATE_DIVK1, k1, 127 OTG3_PIXEL_RATE_DIVK2, k2); 128 break; 129 default: 130 BREAK_TO_DEBUGGER(); 131 return; 132 } 133 } 134 135 static void dccg32_set_dtbclk_p_src( 136 struct dccg *dccg, 137 enum streamclk_source src, 138 uint32_t otg_inst) 139 { 140 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 141 142 uint32_t p_src_sel = 0; /* selects dprefclk */ 143 if (src == DTBCLK0) 144 p_src_sel = 2; /* selects dtbclk0 */ 145 146 switch (otg_inst) { 147 case 0: 148 if (src == REFCLK) 149 REG_UPDATE(DTBCLK_P_CNTL, 150 DTBCLK_P0_EN, 0); 151 else 152 REG_UPDATE_2(DTBCLK_P_CNTL, 153 DTBCLK_P0_SRC_SEL, p_src_sel, 154 DTBCLK_P0_EN, 1); 155 break; 156 case 1: 157 if (src == REFCLK) 158 REG_UPDATE(DTBCLK_P_CNTL, 159 DTBCLK_P1_EN, 0); 160 else 161 REG_UPDATE_2(DTBCLK_P_CNTL, 162 DTBCLK_P1_SRC_SEL, p_src_sel, 163 DTBCLK_P1_EN, 1); 164 break; 165 case 2: 166 if (src == REFCLK) 167 REG_UPDATE(DTBCLK_P_CNTL, 168 DTBCLK_P2_EN, 0); 169 else 170 REG_UPDATE_2(DTBCLK_P_CNTL, 171 DTBCLK_P2_SRC_SEL, p_src_sel, 172 DTBCLK_P2_EN, 1); 173 break; 174 case 3: 175 if (src == REFCLK) 176 REG_UPDATE(DTBCLK_P_CNTL, 177 DTBCLK_P3_EN, 0); 178 else 179 REG_UPDATE_2(DTBCLK_P_CNTL, 180 DTBCLK_P3_SRC_SEL, p_src_sel, 181 DTBCLK_P3_EN, 1); 182 break; 183 default: 184 BREAK_TO_DEBUGGER(); 185 return; 186 } 187 188 } 189 190 /* Controls the generation of pixel valid for OTG in (OTG -> HPO case) */ 191 static void dccg32_set_dtbclk_dto( 192 struct dccg *dccg, 193 const struct dtbclk_dto_params *params) 194 { 195 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 196 /* DTO Output Rate / Pixel Rate = 1/4 */ 197 int req_dtbclk_khz = params->pixclk_khz / 4; 198 199 if (params->ref_dtbclk_khz && req_dtbclk_khz) { 200 uint32_t modulo, phase; 201 202 // phase / modulo = dtbclk / dtbclk ref 203 modulo = params->ref_dtbclk_khz * 1000; 204 phase = req_dtbclk_khz * 1000; 205 206 REG_WRITE(DTBCLK_DTO_MODULO[params->otg_inst], modulo); 207 REG_WRITE(DTBCLK_DTO_PHASE[params->otg_inst], phase); 208 209 REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst], 210 DTBCLK_DTO_ENABLE[params->otg_inst], 1); 211 212 REG_WAIT(OTG_PIXEL_RATE_CNTL[params->otg_inst], 213 DTBCLKDTO_ENABLE_STATUS[params->otg_inst], 1, 214 1, 100); 215 216 /* program OTG_PIXEL_RATE_DIV for DIVK1 and DIVK2 fields */ 217 dccg32_set_pixel_rate_div(dccg, params->otg_inst, PIXEL_RATE_DIV_BY_1, PIXEL_RATE_DIV_BY_1); 218 219 /* The recommended programming sequence to enable DTBCLK DTO to generate 220 * valid pixel HPO DPSTREAM ENCODER, specifies that DTO source select should 221 * be set only after DTO is enabled 222 */ 223 REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst], 224 PIPE_DTO_SRC_SEL[params->otg_inst], 2); 225 } else { 226 REG_UPDATE_2(OTG_PIXEL_RATE_CNTL[params->otg_inst], 227 DTBCLK_DTO_ENABLE[params->otg_inst], 0, 228 PIPE_DTO_SRC_SEL[params->otg_inst], 1); 229 if (params->is_hdmi) 230 REG_UPDATE(OTG_PIXEL_RATE_CNTL[params->otg_inst], 231 PIPE_DTO_SRC_SEL[params->otg_inst], 0); 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 dccg32_set_valid_pixel_rate( 239 struct dccg *dccg, 240 int ref_dtbclk_khz, 241 int otg_inst, 242 int pixclk_khz) 243 { 244 struct dtbclk_dto_params dto_params = {0}; 245 246 dto_params.ref_dtbclk_khz = ref_dtbclk_khz; 247 dto_params.otg_inst = otg_inst; 248 dto_params.pixclk_khz = pixclk_khz; 249 dto_params.is_hdmi = true; 250 251 dccg32_set_dtbclk_dto(dccg, &dto_params); 252 } 253 254 static void dccg32_get_dccg_ref_freq(struct dccg *dccg, 255 unsigned int xtalin_freq_inKhz, 256 unsigned int *dccg_ref_freq_inKhz) 257 { 258 /* 259 * Assume refclk is sourced from xtalin 260 * expect 100MHz 261 */ 262 *dccg_ref_freq_inKhz = xtalin_freq_inKhz; 263 return; 264 } 265 266 static void dccg32_set_dpstreamclk( 267 struct dccg *dccg, 268 enum streamclk_source src, 269 int otg_inst, 270 int dp_hpo_inst) 271 { 272 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 273 274 /* set the dtbclk_p source */ 275 dccg32_set_dtbclk_p_src(dccg, src, otg_inst); 276 277 /* enabled to select one of the DTBCLKs for pipe */ 278 switch (otg_inst) 279 { 280 case 0: 281 REG_UPDATE_2(DPSTREAMCLK_CNTL, 282 DPSTREAMCLK0_EN, 283 (src == REFCLK) ? 0 : 1, DPSTREAMCLK0_SRC_SEL, otg_inst); 284 break; 285 case 1: 286 REG_UPDATE_2(DPSTREAMCLK_CNTL, DPSTREAMCLK1_EN, 287 (src == REFCLK) ? 0 : 1, DPSTREAMCLK1_SRC_SEL, otg_inst); 288 break; 289 case 2: 290 REG_UPDATE_2(DPSTREAMCLK_CNTL, DPSTREAMCLK2_EN, 291 (src == REFCLK) ? 0 : 1, DPSTREAMCLK2_SRC_SEL, otg_inst); 292 break; 293 case 3: 294 REG_UPDATE_2(DPSTREAMCLK_CNTL, DPSTREAMCLK3_EN, 295 (src == REFCLK) ? 0 : 1, DPSTREAMCLK3_SRC_SEL, otg_inst); 296 break; 297 default: 298 BREAK_TO_DEBUGGER(); 299 return; 300 } 301 } 302 303 static void dccg32_otg_add_pixel(struct dccg *dccg, 304 uint32_t otg_inst) 305 { 306 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 307 308 REG_UPDATE(OTG_PIXEL_RATE_CNTL[otg_inst], 309 OTG_ADD_PIXEL[otg_inst], 1); 310 } 311 312 static void dccg32_otg_drop_pixel(struct dccg *dccg, 313 uint32_t otg_inst) 314 { 315 struct dcn_dccg *dccg_dcn = TO_DCN_DCCG(dccg); 316 317 REG_UPDATE(OTG_PIXEL_RATE_CNTL[otg_inst], 318 OTG_DROP_PIXEL[otg_inst], 1); 319 } 320 321 static const struct dccg_funcs dccg32_funcs = { 322 .update_dpp_dto = dccg2_update_dpp_dto, 323 .get_dccg_ref_freq = dccg32_get_dccg_ref_freq, 324 .dccg_init = dccg31_init, 325 .set_dpstreamclk = dccg32_set_dpstreamclk, 326 .enable_symclk32_se = dccg31_enable_symclk32_se, 327 .disable_symclk32_se = dccg31_disable_symclk32_se, 328 .enable_symclk32_le = dccg31_enable_symclk32_le, 329 .disable_symclk32_le = dccg31_disable_symclk32_le, 330 .set_physymclk = dccg31_set_physymclk, 331 .set_dtbclk_dto = dccg32_set_dtbclk_dto, 332 .set_valid_pixel_rate = dccg32_set_valid_pixel_rate, 333 .set_fifo_errdet_ovr_en = dccg2_set_fifo_errdet_ovr_en, 334 .set_audio_dtbclk_dto = dccg31_set_audio_dtbclk_dto, 335 .otg_add_pixel = dccg32_otg_add_pixel, 336 .otg_drop_pixel = dccg32_otg_drop_pixel, 337 .set_pixel_rate_div = dccg32_set_pixel_rate_div, 338 }; 339 340 struct dccg *dccg32_create( 341 struct dc_context *ctx, 342 const struct dccg_registers *regs, 343 const struct dccg_shift *dccg_shift, 344 const struct dccg_mask *dccg_mask) 345 { 346 struct dcn_dccg *dccg_dcn = kzalloc(sizeof(*dccg_dcn), GFP_KERNEL); 347 struct dccg *base; 348 349 if (dccg_dcn == NULL) { 350 BREAK_TO_DEBUGGER(); 351 return NULL; 352 } 353 354 base = &dccg_dcn->base; 355 base->ctx = ctx; 356 base->funcs = &dccg32_funcs; 357 358 dccg_dcn->regs = regs; 359 dccg_dcn->dccg_shift = dccg_shift; 360 dccg_dcn->dccg_mask = dccg_mask; 361 362 return &dccg_dcn->base; 363 } 364