1 // SPDX-License-Identifier: MIT
3 * Copyright © 2020,2021 Intel Corporation
7 #include "intel_step.h"
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.
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.
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.
26 #define COMMON_STEP(x) .graphics_step = STEP_##x, .display_step = STEP_##x, .media_step = STEP_##x
27 #define COMMON_GT_MEDIA_STEP(x) .graphics_step = STEP_##x, .media_step = STEP_##x
29 static const struct intel_step_info skl_revids[] = {
30 [0x6] = { COMMON_STEP(G0) },
31 [0x7] = { COMMON_STEP(H0) },
32 [0x9] = { COMMON_STEP(J0) },
33 [0xA] = { COMMON_STEP(I1) },
36 static const struct intel_step_info kbl_revids[] = {
37 [1] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_B0 },
38 [2] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_B0 },
39 [3] = { COMMON_GT_MEDIA_STEP(D0), .display_step = STEP_B0 },
40 [4] = { COMMON_GT_MEDIA_STEP(F0), .display_step = STEP_C0 },
41 [5] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_B1 },
42 [6] = { COMMON_GT_MEDIA_STEP(D1), .display_step = STEP_B1 },
43 [7] = { COMMON_GT_MEDIA_STEP(G0), .display_step = STEP_C0 },
46 static const struct intel_step_info bxt_revids[] = {
47 [0xA] = { COMMON_STEP(C0) },
48 [0xB] = { COMMON_STEP(C0) },
49 [0xC] = { COMMON_STEP(D0) },
50 [0xD] = { COMMON_STEP(E0) },
53 static const struct intel_step_info glk_revids[] = {
54 [3] = { COMMON_STEP(B0) },
57 static const struct intel_step_info icl_revids[] = {
58 [7] = { COMMON_STEP(D0) },
61 static const struct intel_step_info jsl_ehl_revids[] = {
62 [0] = { COMMON_STEP(A0) },
63 [1] = { COMMON_STEP(B0) },
66 static const struct intel_step_info tgl_uy_revids[] = {
67 [0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A0 },
68 [1] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_C0 },
69 [2] = { COMMON_GT_MEDIA_STEP(B1), .display_step = STEP_C0 },
70 [3] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_D0 },
73 /* Same GT stepping between tgl_uy_revids and tgl_revids don't mean the same HW */
74 static const struct intel_step_info tgl_revids[] = {
75 [0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_B0 },
76 [1] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_D0 },
79 static const struct intel_step_info rkl_revids[] = {
80 [0] = { COMMON_STEP(A0) },
81 [1] = { COMMON_STEP(B0) },
82 [4] = { COMMON_STEP(C0) },
85 static const struct intel_step_info dg1_revids[] = {
86 [0] = { COMMON_STEP(A0) },
87 [1] = { COMMON_STEP(B0) },
90 static const struct intel_step_info adls_revids[] = {
91 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A0 },
92 [0x1] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A2 },
93 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_B0 },
94 [0x8] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_B0 },
95 [0xC] = { COMMON_GT_MEDIA_STEP(D0), .display_step = STEP_C0 },
98 static const struct intel_step_info adlp_revids[] = {
99 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A0 },
100 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_B0 },
101 [0x8] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_C0 },
102 [0xC] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_D0 },
105 static const struct intel_step_info dg2_g10_revid_step_tbl[] = {
106 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_A0 },
107 [0x1] = { COMMON_GT_MEDIA_STEP(A1), .display_step = STEP_A0 },
108 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_B0 },
109 [0x8] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_C0 },
112 static const struct intel_step_info dg2_g11_revid_step_tbl[] = {
113 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_B0 },
114 [0x4] = { COMMON_GT_MEDIA_STEP(B0), .display_step = STEP_C0 },
115 [0x5] = { COMMON_GT_MEDIA_STEP(B1), .display_step = STEP_C0 },
118 static const struct intel_step_info dg2_g12_revid_step_tbl[] = {
119 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_C0 },
120 [0x1] = { COMMON_GT_MEDIA_STEP(A1), .display_step = STEP_C0 },
123 static const struct intel_step_info adls_rpls_revids[] = {
124 [0x4] = { COMMON_GT_MEDIA_STEP(D0), .display_step = STEP_D0 },
125 [0xC] = { COMMON_GT_MEDIA_STEP(D0), .display_step = STEP_C0 },
128 static const struct intel_step_info adlp_rplp_revids[] = {
129 [0x4] = { COMMON_GT_MEDIA_STEP(C0), .display_step = STEP_E0 },
132 static const struct intel_step_info adlp_n_revids[] = {
133 [0x0] = { COMMON_GT_MEDIA_STEP(A0), .display_step = STEP_D0 },
136 static u8 gmd_to_intel_step(struct drm_i915_private *i915,
137 struct intel_ip_version *gmd)
139 u8 step = gmd->step + STEP_A0;
141 if (step >= STEP_FUTURE) {
142 drm_dbg(&i915->drm, "Using future steppings\n");
149 void intel_step_init(struct drm_i915_private *i915)
151 const struct intel_step_info *revids = NULL;
153 int revid = INTEL_REVID(i915);
154 struct intel_step_info step = {};
156 if (HAS_GMD_ID(i915)) {
157 step.graphics_step = gmd_to_intel_step(i915,
158 &RUNTIME_INFO(i915)->graphics.ip);
159 step.media_step = gmd_to_intel_step(i915,
160 &RUNTIME_INFO(i915)->media.ip);
161 step.display_step = STEP_A0 + DISPLAY_RUNTIME_INFO(i915)->ip.step;
162 if (step.display_step >= STEP_FUTURE) {
163 drm_dbg(&i915->drm, "Using future display steppings\n");
164 step.display_step = STEP_FUTURE;
167 RUNTIME_INFO(i915)->step = step;
172 if (IS_DG2_G10(i915)) {
173 revids = dg2_g10_revid_step_tbl;
174 size = ARRAY_SIZE(dg2_g10_revid_step_tbl);
175 } else if (IS_DG2_G11(i915)) {
176 revids = dg2_g11_revid_step_tbl;
177 size = ARRAY_SIZE(dg2_g11_revid_step_tbl);
178 } else if (IS_DG2_G12(i915)) {
179 revids = dg2_g12_revid_step_tbl;
180 size = ARRAY_SIZE(dg2_g12_revid_step_tbl);
181 } else if (IS_ALDERLAKE_P_N(i915)) {
182 revids = adlp_n_revids;
183 size = ARRAY_SIZE(adlp_n_revids);
184 } else if (IS_RAPTORLAKE_P(i915)) {
185 revids = adlp_rplp_revids;
186 size = ARRAY_SIZE(adlp_rplp_revids);
187 } else if (IS_ALDERLAKE_P(i915)) {
188 revids = adlp_revids;
189 size = ARRAY_SIZE(adlp_revids);
190 } else if (IS_RAPTORLAKE_S(i915)) {
191 revids = adls_rpls_revids;
192 size = ARRAY_SIZE(adls_rpls_revids);
193 } else if (IS_ALDERLAKE_S(i915)) {
194 revids = adls_revids;
195 size = ARRAY_SIZE(adls_revids);
196 } else if (IS_DG1(i915)) {
198 size = ARRAY_SIZE(dg1_revids);
199 } else if (IS_ROCKETLAKE(i915)) {
201 size = ARRAY_SIZE(rkl_revids);
202 } else if (IS_TIGERLAKE_UY(i915)) {
203 revids = tgl_uy_revids;
204 size = ARRAY_SIZE(tgl_uy_revids);
205 } else if (IS_TIGERLAKE(i915)) {
207 size = ARRAY_SIZE(tgl_revids);
208 } else if (IS_JASPERLAKE(i915) || IS_ELKHARTLAKE(i915)) {
209 revids = jsl_ehl_revids;
210 size = ARRAY_SIZE(jsl_ehl_revids);
211 } else if (IS_ICELAKE(i915)) {
213 size = ARRAY_SIZE(icl_revids);
214 } else if (IS_GEMINILAKE(i915)) {
216 size = ARRAY_SIZE(glk_revids);
217 } else if (IS_BROXTON(i915)) {
219 size = ARRAY_SIZE(bxt_revids);
220 } else if (IS_KABYLAKE(i915)) {
222 size = ARRAY_SIZE(kbl_revids);
223 } else if (IS_SKYLAKE(i915)) {
225 size = ARRAY_SIZE(skl_revids);
228 /* Not using the stepping scheme for the platform yet. */
232 if (revid < size && revids[revid].graphics_step != STEP_NONE) {
233 step = revids[revid];
235 drm_warn(&i915->drm, "Unknown revid 0x%02x\n", revid);
238 * If we hit a gap in the revid array, use the information for
241 * This may be wrong in all sorts of ways, especially if the
242 * steppings in the array are not monotonically increasing, but
243 * it's better than defaulting to 0.
245 while (revid < size && revids[revid].graphics_step == STEP_NONE)
249 drm_dbg(&i915->drm, "Using steppings for revid 0x%02x\n",
251 step = revids[revid];
253 drm_dbg(&i915->drm, "Using future steppings\n");
254 step.graphics_step = STEP_FUTURE;
255 step.display_step = STEP_FUTURE;
259 if (drm_WARN_ON(&i915->drm, step.graphics_step == STEP_NONE))
262 RUNTIME_INFO(i915)->step = step;
265 #define STEP_NAME_CASE(name) \
269 const char *intel_step_name(enum intel_step step)
272 STEP_NAME_LIST(STEP_NAME_CASE);
279 const char *intel_display_step_name(struct drm_i915_private *i915)
281 return intel_step_name(RUNTIME_INFO(i915)->step.display_step);