1 // SPDX-License-Identifier: MIT 2 /* 3 * Copyright © 2020,2021 Intel Corporation 4 */ 5 6 #include <drm/drm_print.h> 7 8 #include "i915_drv.h" 9 #include "intel_step.h" 10 11 /* 12 * Some platforms have unusual ways of mapping PCI revision ID to GT/display 13 * steppings. E.g., in some cases a higher PCI revision may translate to a 14 * lower stepping of the GT and/or display IP. This file provides lookup 15 * tables to map the PCI revision into a standard set of stepping values that 16 * can be compared numerically. 17 * 18 * Also note that some revisions/steppings may have been set aside as 19 * placeholders but never materialized in real hardware; in those cases there 20 * may be jumps in the revision IDs or stepping values in the tables below. 21 */ 22 23 /* 24 * Some platforms always have the same stepping value for GT and display; 25 * use a macro to define these to make it easier to identify the platforms 26 * where the two steppings can deviate. 27 */ 28 #define COMMON_STEP(x) .graphics_step = STEP_##x, .media_step = STEP_##x 29 30 static const struct intel_step_info skl_revids[] = { 31 [0x6] = { COMMON_STEP(G0) }, 32 [0x7] = { COMMON_STEP(H0) }, 33 [0x9] = { COMMON_STEP(J0) }, 34 [0xA] = { COMMON_STEP(I1) }, 35 }; 36 37 static const struct intel_step_info kbl_revids[] = { 38 [1] = { COMMON_STEP(B0) }, 39 [2] = { COMMON_STEP(C0) }, 40 [3] = { COMMON_STEP(D0) }, 41 [4] = { COMMON_STEP(F0) }, 42 [5] = { COMMON_STEP(C0) }, 43 [6] = { COMMON_STEP(D1) }, 44 [7] = { COMMON_STEP(G0) }, 45 }; 46 47 static const struct intel_step_info bxt_revids[] = { 48 [0xA] = { COMMON_STEP(C0) }, 49 [0xB] = { COMMON_STEP(C0) }, 50 [0xC] = { COMMON_STEP(D0) }, 51 [0xD] = { COMMON_STEP(E0) }, 52 }; 53 54 static const struct intel_step_info glk_revids[] = { 55 [3] = { COMMON_STEP(B0) }, 56 }; 57 58 static const struct intel_step_info icl_revids[] = { 59 [7] = { COMMON_STEP(D0) }, 60 }; 61 62 static const struct intel_step_info jsl_ehl_revids[] = { 63 [0] = { COMMON_STEP(A0) }, 64 [1] = { COMMON_STEP(B0) }, 65 }; 66 67 static const struct intel_step_info tgl_uy_revids[] = { 68 [0] = { COMMON_STEP(A0) }, 69 [1] = { COMMON_STEP(B0) }, 70 [2] = { COMMON_STEP(B1) }, 71 [3] = { COMMON_STEP(C0) }, 72 }; 73 74 /* Same GT stepping between tgl_uy_revids and tgl_revids don't mean the same HW */ 75 static const struct intel_step_info tgl_revids[] = { 76 [0] = { COMMON_STEP(A0) }, 77 [1] = { COMMON_STEP(B0) }, 78 }; 79 80 static const struct intel_step_info rkl_revids[] = { 81 [0] = { COMMON_STEP(A0) }, 82 [1] = { COMMON_STEP(B0) }, 83 [4] = { COMMON_STEP(C0) }, 84 }; 85 86 static const struct intel_step_info dg1_revids[] = { 87 [0] = { COMMON_STEP(A0) }, 88 [1] = { COMMON_STEP(B0) }, 89 }; 90 91 static const struct intel_step_info adls_revids[] = { 92 [0x0] = { COMMON_STEP(A0) }, 93 [0x1] = { COMMON_STEP(A0) }, 94 [0x4] = { COMMON_STEP(B0) }, 95 [0x8] = { COMMON_STEP(C0) }, 96 [0xC] = { COMMON_STEP(D0) }, 97 }; 98 99 static const struct intel_step_info adlp_revids[] = { 100 [0x0] = { COMMON_STEP(A0) }, 101 [0x4] = { COMMON_STEP(B0) }, 102 [0x8] = { COMMON_STEP(C0) }, 103 [0xC] = { COMMON_STEP(C0) }, 104 }; 105 106 static const struct intel_step_info dg2_g10_revid_step_tbl[] = { 107 [0x0] = { COMMON_STEP(A0) }, 108 [0x1] = { COMMON_STEP(A1) }, 109 [0x4] = { COMMON_STEP(B0) }, 110 [0x8] = { COMMON_STEP(C0) }, 111 }; 112 113 static const struct intel_step_info dg2_g11_revid_step_tbl[] = { 114 [0x0] = { COMMON_STEP(A0) }, 115 [0x4] = { COMMON_STEP(B0) }, 116 [0x5] = { COMMON_STEP(B1) }, 117 }; 118 119 static const struct intel_step_info dg2_g12_revid_step_tbl[] = { 120 [0x0] = { COMMON_STEP(A0) }, 121 [0x1] = { COMMON_STEP(A1) }, 122 }; 123 124 static const struct intel_step_info adls_rpls_revids[] = { 125 [0x4] = { COMMON_STEP(D0) }, 126 [0xC] = { COMMON_STEP(D0) }, 127 }; 128 129 static const struct intel_step_info adlp_rplp_revids[] = { 130 [0x4] = { COMMON_STEP(C0) }, 131 }; 132 133 static const struct intel_step_info adlp_n_revids[] = { 134 [0x0] = { COMMON_STEP(A0) }, 135 }; 136 137 static u8 gmd_to_intel_step(struct drm_i915_private *i915, 138 struct intel_ip_version *gmd) 139 { 140 u8 step = gmd->step + STEP_A0; 141 142 if (step >= STEP_FUTURE) { 143 drm_dbg(&i915->drm, "Using future steppings\n"); 144 return STEP_FUTURE; 145 } 146 147 return step; 148 } 149 150 void intel_step_init(struct drm_i915_private *i915) 151 { 152 const struct intel_step_info *revids = NULL; 153 int size = 0; 154 int revid = INTEL_REVID(i915); 155 struct intel_step_info step = {}; 156 157 if (HAS_GMD_ID(i915)) { 158 step.graphics_step = gmd_to_intel_step(i915, 159 &RUNTIME_INFO(i915)->graphics.ip); 160 step.media_step = gmd_to_intel_step(i915, 161 &RUNTIME_INFO(i915)->media.ip); 162 163 RUNTIME_INFO(i915)->step = step; 164 165 return; 166 } 167 168 if (IS_DG2_G10(i915)) { 169 revids = dg2_g10_revid_step_tbl; 170 size = ARRAY_SIZE(dg2_g10_revid_step_tbl); 171 } else if (IS_DG2_G11(i915)) { 172 revids = dg2_g11_revid_step_tbl; 173 size = ARRAY_SIZE(dg2_g11_revid_step_tbl); 174 } else if (IS_DG2_G12(i915)) { 175 revids = dg2_g12_revid_step_tbl; 176 size = ARRAY_SIZE(dg2_g12_revid_step_tbl); 177 } else if (IS_ALDERLAKE_P_N(i915)) { 178 revids = adlp_n_revids; 179 size = ARRAY_SIZE(adlp_n_revids); 180 } else if (IS_RAPTORLAKE_P(i915)) { 181 revids = adlp_rplp_revids; 182 size = ARRAY_SIZE(adlp_rplp_revids); 183 } else if (IS_ALDERLAKE_P(i915)) { 184 revids = adlp_revids; 185 size = ARRAY_SIZE(adlp_revids); 186 } else if (IS_RAPTORLAKE_S(i915)) { 187 revids = adls_rpls_revids; 188 size = ARRAY_SIZE(adls_rpls_revids); 189 } else if (IS_ALDERLAKE_S(i915)) { 190 revids = adls_revids; 191 size = ARRAY_SIZE(adls_revids); 192 } else if (IS_DG1(i915)) { 193 revids = dg1_revids; 194 size = ARRAY_SIZE(dg1_revids); 195 } else if (IS_ROCKETLAKE(i915)) { 196 revids = rkl_revids; 197 size = ARRAY_SIZE(rkl_revids); 198 } else if (IS_TIGERLAKE_UY(i915)) { 199 revids = tgl_uy_revids; 200 size = ARRAY_SIZE(tgl_uy_revids); 201 } else if (IS_TIGERLAKE(i915)) { 202 revids = tgl_revids; 203 size = ARRAY_SIZE(tgl_revids); 204 } else if (IS_JASPERLAKE(i915) || IS_ELKHARTLAKE(i915)) { 205 revids = jsl_ehl_revids; 206 size = ARRAY_SIZE(jsl_ehl_revids); 207 } else if (IS_ICELAKE(i915)) { 208 revids = icl_revids; 209 size = ARRAY_SIZE(icl_revids); 210 } else if (IS_GEMINILAKE(i915)) { 211 revids = glk_revids; 212 size = ARRAY_SIZE(glk_revids); 213 } else if (IS_BROXTON(i915)) { 214 revids = bxt_revids; 215 size = ARRAY_SIZE(bxt_revids); 216 } else if (IS_KABYLAKE(i915)) { 217 revids = kbl_revids; 218 size = ARRAY_SIZE(kbl_revids); 219 } else if (IS_SKYLAKE(i915)) { 220 revids = skl_revids; 221 size = ARRAY_SIZE(skl_revids); 222 } 223 224 /* Not using the stepping scheme for the platform yet. */ 225 if (!revids) 226 return; 227 228 if (revid < size && revids[revid].graphics_step != STEP_NONE) { 229 step = revids[revid]; 230 } else { 231 drm_warn(&i915->drm, "Unknown revid 0x%02x\n", revid); 232 233 /* 234 * If we hit a gap in the revid array, use the information for 235 * the next revid. 236 * 237 * This may be wrong in all sorts of ways, especially if the 238 * steppings in the array are not monotonically increasing, but 239 * it's better than defaulting to 0. 240 */ 241 while (revid < size && revids[revid].graphics_step == STEP_NONE) 242 revid++; 243 244 if (revid < size) { 245 drm_dbg(&i915->drm, "Using steppings for revid 0x%02x\n", 246 revid); 247 step = revids[revid]; 248 } else { 249 drm_dbg(&i915->drm, "Using future steppings\n"); 250 step.graphics_step = STEP_FUTURE; 251 } 252 } 253 254 if (drm_WARN_ON(&i915->drm, step.graphics_step == STEP_NONE)) 255 return; 256 257 RUNTIME_INFO(i915)->step = step; 258 } 259 260 #define STEP_NAME_CASE(name) \ 261 case STEP_##name: \ 262 return #name; 263 264 const char *intel_step_name(enum intel_step step) 265 { 266 switch (step) { 267 STEP_NAME_LIST(STEP_NAME_CASE); 268 269 default: 270 return "**"; 271 } 272 } 273