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