1 // SPDX-License-Identifier: GPL-2.0-only 2 /* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved. 3 */ 4 5 #define pr_fmt(fmt) "[drm:%s:%d] " fmt, __func__, __LINE__ 6 7 #include <linux/debugfs.h> 8 #include <linux/delay.h> 9 10 #include "dpu_vbif.h" 11 #include "dpu_hw_vbif.h" 12 #include "dpu_trace.h" 13 14 /** 15 * _dpu_vbif_wait_for_xin_halt - wait for the xin to halt 16 * @vbif: Pointer to hardware vbif driver 17 * @xin_id: Client interface identifier 18 * @return: 0 if success; error code otherwise 19 */ 20 static int _dpu_vbif_wait_for_xin_halt(struct dpu_hw_vbif *vbif, u32 xin_id) 21 { 22 ktime_t timeout; 23 bool status; 24 int rc; 25 26 if (!vbif || !vbif->cap || !vbif->ops.get_halt_ctrl) { 27 DPU_ERROR("invalid arguments vbif %d\n", vbif != NULL); 28 return -EINVAL; 29 } 30 31 timeout = ktime_add_us(ktime_get(), vbif->cap->xin_halt_timeout); 32 for (;;) { 33 status = vbif->ops.get_halt_ctrl(vbif, xin_id); 34 if (status) 35 break; 36 if (ktime_compare_safe(ktime_get(), timeout) > 0) { 37 status = vbif->ops.get_halt_ctrl(vbif, xin_id); 38 break; 39 } 40 usleep_range(501, 1000); 41 } 42 43 if (!status) { 44 rc = -ETIMEDOUT; 45 DPU_ERROR("VBIF %d client %d not halting. TIMEDOUT.\n", 46 vbif->idx - VBIF_0, xin_id); 47 } else { 48 rc = 0; 49 DPU_DEBUG("VBIF %d client %d is halted\n", 50 vbif->idx - VBIF_0, xin_id); 51 } 52 53 return rc; 54 } 55 56 /** 57 * _dpu_vbif_apply_dynamic_ot_limit - determine OT based on usecase parameters 58 * @vbif: Pointer to hardware vbif driver 59 * @ot_lim: Pointer to OT limit to be modified 60 * @params: Pointer to usecase parameters 61 */ 62 static void _dpu_vbif_apply_dynamic_ot_limit(struct dpu_hw_vbif *vbif, 63 u32 *ot_lim, struct dpu_vbif_set_ot_params *params) 64 { 65 u64 pps; 66 const struct dpu_vbif_dynamic_ot_tbl *tbl; 67 u32 i; 68 69 if (!vbif || !(vbif->cap->features & BIT(DPU_VBIF_QOS_OTLIM))) 70 return; 71 72 /* Dynamic OT setting done only for WFD */ 73 if (!params->is_wfd) 74 return; 75 76 pps = params->frame_rate; 77 pps *= params->width; 78 pps *= params->height; 79 80 tbl = params->rd ? &vbif->cap->dynamic_ot_rd_tbl : 81 &vbif->cap->dynamic_ot_wr_tbl; 82 83 for (i = 0; i < tbl->count; i++) { 84 if (pps <= tbl->cfg[i].pps) { 85 *ot_lim = tbl->cfg[i].ot_limit; 86 break; 87 } 88 } 89 90 DPU_DEBUG("vbif:%d xin:%d w:%d h:%d fps:%d pps:%llu ot:%u\n", 91 vbif->idx - VBIF_0, params->xin_id, 92 params->width, params->height, params->frame_rate, 93 pps, *ot_lim); 94 } 95 96 /** 97 * _dpu_vbif_get_ot_limit - get OT based on usecase & configuration parameters 98 * @vbif: Pointer to hardware vbif driver 99 * @params: Pointer to usecase parameters 100 * @return: OT limit 101 */ 102 static u32 _dpu_vbif_get_ot_limit(struct dpu_hw_vbif *vbif, 103 struct dpu_vbif_set_ot_params *params) 104 { 105 u32 ot_lim = 0; 106 u32 val; 107 108 if (!vbif || !vbif->cap) { 109 DPU_ERROR("invalid arguments vbif %d\n", vbif != NULL); 110 return -EINVAL; 111 } 112 113 if (vbif->cap->default_ot_wr_limit && !params->rd) 114 ot_lim = vbif->cap->default_ot_wr_limit; 115 else if (vbif->cap->default_ot_rd_limit && params->rd) 116 ot_lim = vbif->cap->default_ot_rd_limit; 117 118 /* 119 * If default ot is not set from dt/catalog, 120 * then do not configure it. 121 */ 122 if (ot_lim == 0) 123 goto exit; 124 125 /* Modify the limits if the target and the use case requires it */ 126 _dpu_vbif_apply_dynamic_ot_limit(vbif, &ot_lim, params); 127 128 if (vbif && vbif->ops.get_limit_conf) { 129 val = vbif->ops.get_limit_conf(vbif, 130 params->xin_id, params->rd); 131 if (val == ot_lim) 132 ot_lim = 0; 133 } 134 135 exit: 136 DPU_DEBUG("vbif:%d xin:%d ot_lim:%d\n", 137 vbif->idx - VBIF_0, params->xin_id, ot_lim); 138 return ot_lim; 139 } 140 141 /** 142 * dpu_vbif_set_ot_limit - set OT based on usecase & configuration parameters 143 * @dpu_kms: DPU handler 144 * @params: Pointer to usecase parameters 145 * 146 * Note this function would block waiting for bus halt. 147 */ 148 void dpu_vbif_set_ot_limit(struct dpu_kms *dpu_kms, 149 struct dpu_vbif_set_ot_params *params) 150 { 151 struct dpu_hw_vbif *vbif = NULL; 152 struct dpu_hw_mdp *mdp; 153 bool forced_on = false; 154 u32 ot_lim; 155 int ret, i; 156 157 mdp = dpu_kms->hw_mdp; 158 159 for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) { 160 if (dpu_kms->hw_vbif[i] && 161 dpu_kms->hw_vbif[i]->idx == params->vbif_idx) 162 vbif = dpu_kms->hw_vbif[i]; 163 } 164 165 if (!vbif || !mdp) { 166 DPU_DEBUG("invalid arguments vbif %d mdp %d\n", 167 vbif != NULL, mdp != NULL); 168 return; 169 } 170 171 if (!mdp->ops.setup_clk_force_ctrl || 172 !vbif->ops.set_limit_conf || 173 !vbif->ops.set_halt_ctrl) 174 return; 175 176 /* set write_gather_en for all write clients */ 177 if (vbif->ops.set_write_gather_en && !params->rd) 178 vbif->ops.set_write_gather_en(vbif, params->xin_id); 179 180 ot_lim = _dpu_vbif_get_ot_limit(vbif, params) & 0xFF; 181 182 if (ot_lim == 0) 183 return; 184 185 trace_dpu_perf_set_ot(params->num, params->xin_id, ot_lim, 186 params->vbif_idx); 187 188 forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, true); 189 190 vbif->ops.set_limit_conf(vbif, params->xin_id, params->rd, ot_lim); 191 192 vbif->ops.set_halt_ctrl(vbif, params->xin_id, true); 193 194 ret = _dpu_vbif_wait_for_xin_halt(vbif, params->xin_id); 195 if (ret) 196 trace_dpu_vbif_wait_xin_halt_fail(vbif->idx, params->xin_id); 197 198 vbif->ops.set_halt_ctrl(vbif, params->xin_id, false); 199 200 if (forced_on) 201 mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, false); 202 } 203 204 void dpu_vbif_set_qos_remap(struct dpu_kms *dpu_kms, 205 struct dpu_vbif_set_qos_params *params) 206 { 207 struct dpu_hw_vbif *vbif = NULL; 208 struct dpu_hw_mdp *mdp; 209 bool forced_on = false; 210 const struct dpu_vbif_qos_tbl *qos_tbl; 211 int i; 212 213 if (!params || !dpu_kms->hw_mdp) { 214 DPU_ERROR("invalid arguments\n"); 215 return; 216 } 217 mdp = dpu_kms->hw_mdp; 218 219 for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) { 220 if (dpu_kms->hw_vbif[i] && 221 dpu_kms->hw_vbif[i]->idx == params->vbif_idx) { 222 vbif = dpu_kms->hw_vbif[i]; 223 break; 224 } 225 } 226 227 if (!vbif || !vbif->cap) { 228 DPU_ERROR("invalid vbif %d\n", params->vbif_idx); 229 return; 230 } 231 232 if (!vbif->ops.set_qos_remap || !mdp->ops.setup_clk_force_ctrl) { 233 DPU_DEBUG("qos remap not supported\n"); 234 return; 235 } 236 237 qos_tbl = params->is_rt ? &vbif->cap->qos_rt_tbl : 238 &vbif->cap->qos_nrt_tbl; 239 240 if (!qos_tbl->npriority_lvl || !qos_tbl->priority_lvl) { 241 DPU_DEBUG("qos tbl not defined\n"); 242 return; 243 } 244 245 forced_on = mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, true); 246 247 for (i = 0; i < qos_tbl->npriority_lvl; i++) { 248 DPU_DEBUG("vbif:%d xin:%d lvl:%d/%d\n", 249 params->vbif_idx, params->xin_id, i, 250 qos_tbl->priority_lvl[i]); 251 vbif->ops.set_qos_remap(vbif, params->xin_id, i, 252 qos_tbl->priority_lvl[i]); 253 } 254 255 if (forced_on) 256 mdp->ops.setup_clk_force_ctrl(mdp, params->clk_ctrl, false); 257 } 258 259 void dpu_vbif_clear_errors(struct dpu_kms *dpu_kms) 260 { 261 struct dpu_hw_vbif *vbif; 262 u32 i, pnd, src; 263 264 for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) { 265 vbif = dpu_kms->hw_vbif[i]; 266 if (vbif && vbif->ops.clear_errors) { 267 vbif->ops.clear_errors(vbif, &pnd, &src); 268 if (pnd || src) { 269 DRM_DEBUG_KMS("VBIF %d: pnd 0x%X, src 0x%X\n", 270 vbif->idx - VBIF_0, pnd, src); 271 } 272 } 273 } 274 } 275 276 void dpu_vbif_init_memtypes(struct dpu_kms *dpu_kms) 277 { 278 struct dpu_hw_vbif *vbif; 279 int i, j; 280 281 for (i = 0; i < ARRAY_SIZE(dpu_kms->hw_vbif); i++) { 282 vbif = dpu_kms->hw_vbif[i]; 283 if (vbif && vbif->cap && vbif->ops.set_mem_type) { 284 for (j = 0; j < vbif->cap->memtype_count; j++) 285 vbif->ops.set_mem_type( 286 vbif, j, vbif->cap->memtype[j]); 287 } 288 } 289 } 290 291 #ifdef CONFIG_DEBUG_FS 292 293 void dpu_debugfs_vbif_init(struct dpu_kms *dpu_kms, struct dentry *debugfs_root) 294 { 295 char vbif_name[32]; 296 struct dentry *entry, *debugfs_vbif; 297 int i, j; 298 299 entry = debugfs_create_dir("vbif", debugfs_root); 300 301 for (i = 0; i < dpu_kms->catalog->vbif_count; i++) { 302 const struct dpu_vbif_cfg *vbif = &dpu_kms->catalog->vbif[i]; 303 304 snprintf(vbif_name, sizeof(vbif_name), "%d", vbif->id); 305 306 debugfs_vbif = debugfs_create_dir(vbif_name, entry); 307 308 debugfs_create_u32("features", 0600, debugfs_vbif, 309 (u32 *)&vbif->features); 310 311 debugfs_create_u32("xin_halt_timeout", 0400, debugfs_vbif, 312 (u32 *)&vbif->xin_halt_timeout); 313 314 debugfs_create_u32("default_rd_ot_limit", 0400, debugfs_vbif, 315 (u32 *)&vbif->default_ot_rd_limit); 316 317 debugfs_create_u32("default_wr_ot_limit", 0400, debugfs_vbif, 318 (u32 *)&vbif->default_ot_wr_limit); 319 320 for (j = 0; j < vbif->dynamic_ot_rd_tbl.count; j++) { 321 const struct dpu_vbif_dynamic_ot_cfg *cfg = 322 &vbif->dynamic_ot_rd_tbl.cfg[j]; 323 324 snprintf(vbif_name, sizeof(vbif_name), 325 "dynamic_ot_rd_%d_pps", j); 326 debugfs_create_u64(vbif_name, 0400, debugfs_vbif, 327 (u64 *)&cfg->pps); 328 snprintf(vbif_name, sizeof(vbif_name), 329 "dynamic_ot_rd_%d_ot_limit", j); 330 debugfs_create_u32(vbif_name, 0400, debugfs_vbif, 331 (u32 *)&cfg->ot_limit); 332 } 333 334 for (j = 0; j < vbif->dynamic_ot_wr_tbl.count; j++) { 335 const struct dpu_vbif_dynamic_ot_cfg *cfg = 336 &vbif->dynamic_ot_wr_tbl.cfg[j]; 337 338 snprintf(vbif_name, sizeof(vbif_name), 339 "dynamic_ot_wr_%d_pps", j); 340 debugfs_create_u64(vbif_name, 0400, debugfs_vbif, 341 (u64 *)&cfg->pps); 342 snprintf(vbif_name, sizeof(vbif_name), 343 "dynamic_ot_wr_%d_ot_limit", j); 344 debugfs_create_u32(vbif_name, 0400, debugfs_vbif, 345 (u32 *)&cfg->ot_limit); 346 } 347 } 348 } 349 #endif 350