228 lines
6.8 KiB
C
228 lines
6.8 KiB
C
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// SPDX-License-Identifier: MIT
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/*
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* Copyright © 2020,2021 Intel Corporation
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*/
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#include "i915_drv.h"
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#include "intel_step.h"
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/*
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* Some platforms have unusual ways of mapping PCI revision ID to GT/display
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* steppings. E.g., in some cases a higher PCI revision may translate to a
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* lower stepping of the GT and/or display IP. This file provides lookup
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* tables to map the PCI revision into a standard set of stepping values that
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* can be compared numerically.
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*
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* Also note that some revisions/steppings may have been set aside as
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* placeholders but never materialized in real hardware; in those cases there
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* may be jumps in the revision IDs or stepping values in the tables below.
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*/
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/*
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* Some platforms always have the same stepping value for GT and display;
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* use a macro to define these to make it easier to identify the platforms
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* where the two steppings can deviate.
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*/
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#define COMMON_STEP(x) .gt_step = STEP_##x, .display_step = STEP_##x
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static const struct intel_step_info skl_revids[] = {
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[0x6] = { COMMON_STEP(G0) },
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[0x7] = { COMMON_STEP(H0) },
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[0x9] = { COMMON_STEP(J0) },
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[0xA] = { COMMON_STEP(I1) },
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};
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static const struct intel_step_info kbl_revids[] = {
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[1] = { .gt_step = STEP_B0, .display_step = STEP_B0 },
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[2] = { .gt_step = STEP_C0, .display_step = STEP_B0 },
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[3] = { .gt_step = STEP_D0, .display_step = STEP_B0 },
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[4] = { .gt_step = STEP_F0, .display_step = STEP_C0 },
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[5] = { .gt_step = STEP_C0, .display_step = STEP_B1 },
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[6] = { .gt_step = STEP_D1, .display_step = STEP_B1 },
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[7] = { .gt_step = STEP_G0, .display_step = STEP_C0 },
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};
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static const struct intel_step_info bxt_revids[] = {
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[0xA] = { COMMON_STEP(C0) },
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[0xB] = { COMMON_STEP(C0) },
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[0xC] = { COMMON_STEP(D0) },
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[0xD] = { COMMON_STEP(E0) },
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};
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static const struct intel_step_info glk_revids[] = {
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[3] = { COMMON_STEP(B0) },
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};
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static const struct intel_step_info icl_revids[] = {
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[7] = { COMMON_STEP(D0) },
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};
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static const struct intel_step_info jsl_ehl_revids[] = {
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[0] = { COMMON_STEP(A0) },
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[1] = { COMMON_STEP(B0) },
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};
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static const struct intel_step_info tgl_uy_revids[] = {
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[0] = { .gt_step = STEP_A0, .display_step = STEP_A0 },
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[1] = { .gt_step = STEP_B0, .display_step = STEP_C0 },
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[2] = { .gt_step = STEP_B1, .display_step = STEP_C0 },
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[3] = { .gt_step = STEP_C0, .display_step = STEP_D0 },
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};
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/* Same GT stepping between tgl_uy_revids and tgl_revids don't mean the same HW */
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static const struct intel_step_info tgl_revids[] = {
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[0] = { .gt_step = STEP_A0, .display_step = STEP_B0 },
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[1] = { .gt_step = STEP_B0, .display_step = STEP_D0 },
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};
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static const struct intel_step_info rkl_revids[] = {
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[0] = { COMMON_STEP(A0) },
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[1] = { COMMON_STEP(B0) },
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[4] = { COMMON_STEP(C0) },
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};
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static const struct intel_step_info dg1_revids[] = {
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[0] = { COMMON_STEP(A0) },
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[1] = { COMMON_STEP(B0) },
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};
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static const struct intel_step_info adls_revids[] = {
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[0x0] = { .gt_step = STEP_A0, .display_step = STEP_A0 },
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[0x1] = { .gt_step = STEP_A0, .display_step = STEP_A2 },
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[0x4] = { .gt_step = STEP_B0, .display_step = STEP_B0 },
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[0x8] = { .gt_step = STEP_C0, .display_step = STEP_B0 },
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[0xC] = { .gt_step = STEP_D0, .display_step = STEP_C0 },
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};
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static const struct intel_step_info adlp_revids[] = {
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[0x0] = { .gt_step = STEP_A0, .display_step = STEP_A0 },
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[0x4] = { .gt_step = STEP_B0, .display_step = STEP_B0 },
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[0x8] = { .gt_step = STEP_C0, .display_step = STEP_C0 },
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[0xC] = { .gt_step = STEP_C0, .display_step = STEP_D0 },
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};
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static const struct intel_step_info xehpsdv_revids[] = {
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[0x0] = { .gt_step = STEP_A0 },
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[0x1] = { .gt_step = STEP_A1 },
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[0x4] = { .gt_step = STEP_B0 },
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[0x8] = { .gt_step = STEP_C0 },
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};
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static const struct intel_step_info dg2_g10_revid_step_tbl[] = {
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[0x0] = { .gt_step = STEP_A0, .display_step = STEP_A0 },
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[0x1] = { .gt_step = STEP_A1, .display_step = STEP_A0 },
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[0x4] = { .gt_step = STEP_B0, .display_step = STEP_B0 },
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[0x8] = { .gt_step = STEP_C0, .display_step = STEP_C0 },
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};
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static const struct intel_step_info dg2_g11_revid_step_tbl[] = {
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[0x0] = { .gt_step = STEP_A0, .display_step = STEP_B0 },
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[0x4] = { .gt_step = STEP_B0, .display_step = STEP_C0 },
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[0x5] = { .gt_step = STEP_B1, .display_step = STEP_C0 },
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};
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void intel_step_init(struct drm_i915_private *i915)
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{
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const struct intel_step_info *revids = NULL;
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int size = 0;
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int revid = INTEL_REVID(i915);
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struct intel_step_info step = {};
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if (IS_DG2_G10(i915)) {
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revids = dg2_g10_revid_step_tbl;
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size = ARRAY_SIZE(dg2_g10_revid_step_tbl);
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} else if (IS_DG2_G11(i915)) {
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revids = dg2_g11_revid_step_tbl;
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size = ARRAY_SIZE(dg2_g11_revid_step_tbl);
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} else if (IS_XEHPSDV(i915)) {
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revids = xehpsdv_revids;
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size = ARRAY_SIZE(xehpsdv_revids);
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} else if (IS_ALDERLAKE_P(i915)) {
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revids = adlp_revids;
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size = ARRAY_SIZE(adlp_revids);
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} else if (IS_ALDERLAKE_S(i915)) {
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revids = adls_revids;
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size = ARRAY_SIZE(adls_revids);
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} else if (IS_DG1(i915)) {
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revids = dg1_revids;
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size = ARRAY_SIZE(dg1_revids);
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} else if (IS_ROCKETLAKE(i915)) {
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revids = rkl_revids;
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size = ARRAY_SIZE(rkl_revids);
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} else if (IS_TGL_U(i915) || IS_TGL_Y(i915)) {
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revids = tgl_uy_revids;
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size = ARRAY_SIZE(tgl_uy_revids);
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} else if (IS_TIGERLAKE(i915)) {
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revids = tgl_revids;
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size = ARRAY_SIZE(tgl_revids);
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} else if (IS_JSL_EHL(i915)) {
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revids = jsl_ehl_revids;
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size = ARRAY_SIZE(jsl_ehl_revids);
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} else if (IS_ICELAKE(i915)) {
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revids = icl_revids;
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size = ARRAY_SIZE(icl_revids);
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} else if (IS_GEMINILAKE(i915)) {
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revids = glk_revids;
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size = ARRAY_SIZE(glk_revids);
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} else if (IS_BROXTON(i915)) {
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revids = bxt_revids;
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size = ARRAY_SIZE(bxt_revids);
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} else if (IS_KABYLAKE(i915)) {
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revids = kbl_revids;
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size = ARRAY_SIZE(kbl_revids);
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} else if (IS_SKYLAKE(i915)) {
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revids = skl_revids;
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size = ARRAY_SIZE(skl_revids);
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}
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/* Not using the stepping scheme for the platform yet. */
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if (!revids)
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return;
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if (revid < size && revids[revid].gt_step != STEP_NONE) {
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step = revids[revid];
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} else {
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drm_warn(&i915->drm, "Unknown revid 0x%02x\n", revid);
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/*
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* If we hit a gap in the revid array, use the information for
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* the next revid.
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*
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* This may be wrong in all sorts of ways, especially if the
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* steppings in the array are not monotonically increasing, but
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* it's better than defaulting to 0.
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*/
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while (revid < size && revids[revid].gt_step == STEP_NONE)
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revid++;
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if (revid < size) {
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drm_dbg(&i915->drm, "Using steppings for revid 0x%02x\n",
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revid);
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step = revids[revid];
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} else {
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drm_dbg(&i915->drm, "Using future steppings\n");
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step.gt_step = STEP_FUTURE;
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step.display_step = STEP_FUTURE;
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}
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}
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if (drm_WARN_ON(&i915->drm, step.gt_step == STEP_NONE))
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return;
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RUNTIME_INFO(i915)->step = step;
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}
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#define STEP_NAME_CASE(name) \
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case STEP_##name: \
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return #name;
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const char *intel_step_name(enum intel_step step)
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{
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switch (step) {
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STEP_NAME_LIST(STEP_NAME_CASE);
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default:
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return "**";
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}
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}
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