1 /* 2 * Copyright © 2012-2016 Intel Corporation 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 (including the next 12 * paragraph) shall be included in all copies or substantial portions of the 13 * 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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS 21 * IN THE SOFTWARE. 22 * 23 */ 24 25 #ifndef _INTEL_DPLL_MGR_H_ 26 #define _INTEL_DPLL_MGR_H_ 27 28 #include <linux/types.h> 29 30 #include "intel_display.h" 31 #include "intel_wakeref.h" 32 33 /*FIXME: Move this to a more appropriate place. */ 34 #define abs_diff(a, b) ({ \ 35 typeof(a) __a = (a); \ 36 typeof(b) __b = (b); \ 37 (void) (&__a == &__b); \ 38 __a > __b ? (__a - __b) : (__b - __a); }) 39 40 struct drm_device; 41 struct drm_i915_private; 42 struct intel_atomic_state; 43 struct intel_crtc; 44 struct intel_crtc_state; 45 struct intel_encoder; 46 struct intel_shared_dpll; 47 48 /** 49 * enum intel_dpll_id - possible DPLL ids 50 * 51 * Enumeration of possible IDs for a DPLL. Real shared dpll ids must be >= 0. 52 */ 53 enum intel_dpll_id { 54 /** 55 * @DPLL_ID_PRIVATE: non-shared dpll in use 56 */ 57 DPLL_ID_PRIVATE = -1, 58 59 /** 60 * @DPLL_ID_PCH_PLL_A: DPLL A in ILK, SNB and IVB 61 */ 62 DPLL_ID_PCH_PLL_A = 0, 63 /** 64 * @DPLL_ID_PCH_PLL_B: DPLL B in ILK, SNB and IVB 65 */ 66 DPLL_ID_PCH_PLL_B = 1, 67 68 69 /** 70 * @DPLL_ID_WRPLL1: HSW and BDW WRPLL1 71 */ 72 DPLL_ID_WRPLL1 = 0, 73 /** 74 * @DPLL_ID_WRPLL2: HSW and BDW WRPLL2 75 */ 76 DPLL_ID_WRPLL2 = 1, 77 /** 78 * @DPLL_ID_SPLL: HSW and BDW SPLL 79 */ 80 DPLL_ID_SPLL = 2, 81 /** 82 * @DPLL_ID_LCPLL_810: HSW and BDW 0.81 GHz LCPLL 83 */ 84 DPLL_ID_LCPLL_810 = 3, 85 /** 86 * @DPLL_ID_LCPLL_1350: HSW and BDW 1.35 GHz LCPLL 87 */ 88 DPLL_ID_LCPLL_1350 = 4, 89 /** 90 * @DPLL_ID_LCPLL_2700: HSW and BDW 2.7 GHz LCPLL 91 */ 92 DPLL_ID_LCPLL_2700 = 5, 93 94 95 /** 96 * @DPLL_ID_SKL_DPLL0: SKL and later DPLL0 97 */ 98 DPLL_ID_SKL_DPLL0 = 0, 99 /** 100 * @DPLL_ID_SKL_DPLL1: SKL and later DPLL1 101 */ 102 DPLL_ID_SKL_DPLL1 = 1, 103 /** 104 * @DPLL_ID_SKL_DPLL2: SKL and later DPLL2 105 */ 106 DPLL_ID_SKL_DPLL2 = 2, 107 /** 108 * @DPLL_ID_SKL_DPLL3: SKL and later DPLL3 109 */ 110 DPLL_ID_SKL_DPLL3 = 3, 111 112 113 /** 114 * @DPLL_ID_ICL_DPLL0: ICL/TGL combo PHY DPLL0 115 */ 116 DPLL_ID_ICL_DPLL0 = 0, 117 /** 118 * @DPLL_ID_ICL_DPLL1: ICL/TGL combo PHY DPLL1 119 */ 120 DPLL_ID_ICL_DPLL1 = 1, 121 /** 122 * @DPLL_ID_EHL_DPLL4: EHL combo PHY DPLL4 123 */ 124 DPLL_ID_EHL_DPLL4 = 2, 125 /** 126 * @DPLL_ID_ICL_TBTPLL: ICL/TGL TBT PLL 127 */ 128 DPLL_ID_ICL_TBTPLL = 2, 129 /** 130 * @DPLL_ID_ICL_MGPLL1: ICL MG PLL 1 port 1 (C), 131 * TGL TC PLL 1 port 1 (TC1) 132 */ 133 DPLL_ID_ICL_MGPLL1 = 3, 134 /** 135 * @DPLL_ID_ICL_MGPLL2: ICL MG PLL 1 port 2 (D) 136 * TGL TC PLL 1 port 2 (TC2) 137 */ 138 DPLL_ID_ICL_MGPLL2 = 4, 139 /** 140 * @DPLL_ID_ICL_MGPLL3: ICL MG PLL 1 port 3 (E) 141 * TGL TC PLL 1 port 3 (TC3) 142 */ 143 DPLL_ID_ICL_MGPLL3 = 5, 144 /** 145 * @DPLL_ID_ICL_MGPLL4: ICL MG PLL 1 port 4 (F) 146 * TGL TC PLL 1 port 4 (TC4) 147 */ 148 DPLL_ID_ICL_MGPLL4 = 6, 149 /** 150 * @DPLL_ID_TGL_MGPLL5: TGL TC PLL port 5 (TC5) 151 */ 152 DPLL_ID_TGL_MGPLL5 = 7, 153 /** 154 * @DPLL_ID_TGL_MGPLL6: TGL TC PLL port 6 (TC6) 155 */ 156 DPLL_ID_TGL_MGPLL6 = 8, 157 }; 158 159 #define I915_NUM_PLLS 9 160 161 enum icl_port_dpll_id { 162 ICL_PORT_DPLL_DEFAULT, 163 ICL_PORT_DPLL_MG_PHY, 164 165 ICL_PORT_DPLL_COUNT, 166 }; 167 168 struct intel_dpll_hw_state { 169 /* i9xx, pch plls */ 170 u32 dpll; 171 u32 dpll_md; 172 u32 fp0; 173 u32 fp1; 174 175 /* hsw, bdw */ 176 u32 wrpll; 177 u32 spll; 178 179 /* skl */ 180 /* 181 * DPLL_CTRL1 has 6 bits for each each this DPLL. We store those in 182 * lower part of ctrl1 and they get shifted into position when writing 183 * the register. This allows us to easily compare the state to share 184 * the DPLL. 185 */ 186 u32 ctrl1; 187 /* HDMI only, 0 when used for DP */ 188 u32 cfgcr1, cfgcr2; 189 190 /* cnl */ 191 u32 cfgcr0; 192 /* CNL also uses cfgcr1 */ 193 194 /* bxt */ 195 u32 ebb0, ebb4, pll0, pll1, pll2, pll3, pll6, pll8, pll9, pll10, pcsdw12; 196 197 /* 198 * ICL uses the following, already defined: 199 * u32 cfgcr0, cfgcr1; 200 */ 201 u32 mg_refclkin_ctl; 202 u32 mg_clktop2_coreclkctl1; 203 u32 mg_clktop2_hsclkctl; 204 u32 mg_pll_div0; 205 u32 mg_pll_div1; 206 u32 mg_pll_lf; 207 u32 mg_pll_frac_lock; 208 u32 mg_pll_ssc; 209 u32 mg_pll_bias; 210 u32 mg_pll_tdc_coldst_bias; 211 u32 mg_pll_bias_mask; 212 u32 mg_pll_tdc_coldst_bias_mask; 213 }; 214 215 /** 216 * struct intel_shared_dpll_state - hold the DPLL atomic state 217 * 218 * This structure holds an atomic state for the DPLL, that can represent 219 * either its current state (in struct &intel_shared_dpll) or a desired 220 * future state which would be applied by an atomic mode set (stored in 221 * a struct &intel_atomic_state). 222 * 223 * See also intel_reserve_shared_dplls() and intel_release_shared_dplls(). 224 */ 225 struct intel_shared_dpll_state { 226 /** 227 * @crtc_mask: mask of CRTC using this DPLL, active or not 228 */ 229 unsigned crtc_mask; 230 231 /** 232 * @hw_state: hardware configuration for the DPLL stored in 233 * struct &intel_dpll_hw_state. 234 */ 235 struct intel_dpll_hw_state hw_state; 236 }; 237 238 /** 239 * struct intel_shared_dpll_funcs - platform specific hooks for managing DPLLs 240 */ 241 struct intel_shared_dpll_funcs { 242 /** 243 * @prepare: 244 * 245 * Optional hook to perform operations prior to enabling the PLL. 246 * Called from intel_prepare_shared_dpll() function unless the PLL 247 * is already enabled. 248 */ 249 void (*prepare)(struct drm_i915_private *dev_priv, 250 struct intel_shared_dpll *pll); 251 252 /** 253 * @enable: 254 * 255 * Hook for enabling the pll, called from intel_enable_shared_dpll() 256 * if the pll is not already enabled. 257 */ 258 void (*enable)(struct drm_i915_private *dev_priv, 259 struct intel_shared_dpll *pll); 260 261 /** 262 * @disable: 263 * 264 * Hook for disabling the pll, called from intel_disable_shared_dpll() 265 * only when it is safe to disable the pll, i.e., there are no more 266 * tracked users for it. 267 */ 268 void (*disable)(struct drm_i915_private *dev_priv, 269 struct intel_shared_dpll *pll); 270 271 /** 272 * @get_hw_state: 273 * 274 * Hook for reading the values currently programmed to the DPLL 275 * registers. This is used for initial hw state readout and state 276 * verification after a mode set. 277 */ 278 bool (*get_hw_state)(struct drm_i915_private *dev_priv, 279 struct intel_shared_dpll *pll, 280 struct intel_dpll_hw_state *hw_state); 281 282 /** 283 * @get_freq: 284 * 285 * Hook for calculating the pll's output frequency based on its 286 * current state. 287 */ 288 int (*get_freq)(struct drm_i915_private *i915, 289 const struct intel_shared_dpll *pll); 290 }; 291 292 /** 293 * struct dpll_info - display PLL platform specific info 294 */ 295 struct dpll_info { 296 /** 297 * @name: DPLL name; used for logging 298 */ 299 const char *name; 300 301 /** 302 * @funcs: platform specific hooks 303 */ 304 const struct intel_shared_dpll_funcs *funcs; 305 306 /** 307 * @id: unique indentifier for this DPLL; should match the index in the 308 * dev_priv->shared_dplls array 309 */ 310 enum intel_dpll_id id; 311 312 #define INTEL_DPLL_ALWAYS_ON (1 << 0) 313 /** 314 * @flags: 315 * 316 * INTEL_DPLL_ALWAYS_ON 317 * Inform the state checker that the DPLL is kept enabled even if 318 * not in use by any CRTC. 319 */ 320 u32 flags; 321 }; 322 323 /** 324 * struct intel_shared_dpll - display PLL with tracked state and users 325 */ 326 struct intel_shared_dpll { 327 /** 328 * @state: 329 * 330 * Store the state for the pll, including its hw state 331 * and CRTCs using it. 332 */ 333 struct intel_shared_dpll_state state; 334 335 /** 336 * @active_mask: mask of active CRTCs (i.e. DPMS on) using this DPLL 337 */ 338 unsigned active_mask; 339 340 /** 341 * @on: is the PLL actually active? Disabled during modeset 342 */ 343 bool on; 344 345 /** 346 * @info: platform specific info 347 */ 348 const struct dpll_info *info; 349 350 /** 351 * @wakeref: In some platforms a device-level runtime pm reference may 352 * need to be grabbed to disable DC states while this DPLL is enabled 353 */ 354 intel_wakeref_t wakeref; 355 }; 356 357 #define SKL_DPLL0 0 358 #define SKL_DPLL1 1 359 #define SKL_DPLL2 2 360 #define SKL_DPLL3 3 361 362 /* shared dpll functions */ 363 struct intel_shared_dpll * 364 intel_get_shared_dpll_by_id(struct drm_i915_private *dev_priv, 365 enum intel_dpll_id id); 366 enum intel_dpll_id 367 intel_get_shared_dpll_id(struct drm_i915_private *dev_priv, 368 struct intel_shared_dpll *pll); 369 void assert_shared_dpll(struct drm_i915_private *dev_priv, 370 struct intel_shared_dpll *pll, 371 bool state); 372 #define assert_shared_dpll_enabled(d, p) assert_shared_dpll(d, p, true) 373 #define assert_shared_dpll_disabled(d, p) assert_shared_dpll(d, p, false) 374 bool intel_reserve_shared_dplls(struct intel_atomic_state *state, 375 struct intel_crtc *crtc, 376 struct intel_encoder *encoder); 377 void intel_release_shared_dplls(struct intel_atomic_state *state, 378 struct intel_crtc *crtc); 379 void icl_set_active_port_dpll(struct intel_crtc_state *crtc_state, 380 enum icl_port_dpll_id port_dpll_id); 381 void intel_update_active_dpll(struct intel_atomic_state *state, 382 struct intel_crtc *crtc, 383 struct intel_encoder *encoder); 384 int intel_dpll_get_freq(struct drm_i915_private *i915, 385 const struct intel_shared_dpll *pll); 386 void intel_prepare_shared_dpll(const struct intel_crtc_state *crtc_state); 387 void intel_enable_shared_dpll(const struct intel_crtc_state *crtc_state); 388 void intel_disable_shared_dpll(const struct intel_crtc_state *crtc_state); 389 void intel_shared_dpll_swap_state(struct intel_atomic_state *state); 390 void intel_shared_dpll_init(struct drm_device *dev); 391 void intel_dpll_readout_hw_state(struct drm_i915_private *dev_priv); 392 void intel_dpll_sanitize_state(struct drm_i915_private *dev_priv); 393 394 void intel_dpll_dump_hw_state(struct drm_i915_private *dev_priv, 395 const struct intel_dpll_hw_state *hw_state); 396 enum intel_dpll_id icl_tc_port_to_pll_id(enum tc_port tc_port); 397 bool intel_dpll_is_combophy(enum intel_dpll_id id); 398 399 #endif /* _INTEL_DPLL_MGR_H_ */ 400
