1 // SPDX-License-Identifier: MIT
3 * Copyright 2019 Intel Corporation.
7 #include "i915_utils.h"
10 /* Map PCH device id to PCH type, or PCH_NONE if unknown. */
12 intel_pch_type(const struct drm_i915_private *dev_priv, unsigned short id)
15 case INTEL_PCH_IBX_DEVICE_ID_TYPE:
16 drm_dbg_kms(&dev_priv->drm, "Found Ibex Peak PCH\n");
17 drm_WARN_ON(&dev_priv->drm, GRAPHICS_VER(dev_priv) != 5);
19 case INTEL_PCH_CPT_DEVICE_ID_TYPE:
20 drm_dbg_kms(&dev_priv->drm, "Found CougarPoint PCH\n");
21 drm_WARN_ON(&dev_priv->drm,
22 GRAPHICS_VER(dev_priv) != 6 && !IS_IVYBRIDGE(dev_priv));
24 case INTEL_PCH_PPT_DEVICE_ID_TYPE:
25 drm_dbg_kms(&dev_priv->drm, "Found PantherPoint PCH\n");
26 drm_WARN_ON(&dev_priv->drm,
27 GRAPHICS_VER(dev_priv) != 6 && !IS_IVYBRIDGE(dev_priv));
28 /* PPT is CPT compatible */
30 case INTEL_PCH_LPT_DEVICE_ID_TYPE:
31 drm_dbg_kms(&dev_priv->drm, "Found LynxPoint PCH\n");
32 drm_WARN_ON(&dev_priv->drm,
33 !IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
34 drm_WARN_ON(&dev_priv->drm,
35 IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv));
37 case INTEL_PCH_LPT_LP_DEVICE_ID_TYPE:
38 drm_dbg_kms(&dev_priv->drm, "Found LynxPoint LP PCH\n");
39 drm_WARN_ON(&dev_priv->drm,
40 !IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
41 drm_WARN_ON(&dev_priv->drm,
42 !IS_HSW_ULT(dev_priv) && !IS_BDW_ULT(dev_priv));
44 case INTEL_PCH_WPT_DEVICE_ID_TYPE:
45 drm_dbg_kms(&dev_priv->drm, "Found WildcatPoint PCH\n");
46 drm_WARN_ON(&dev_priv->drm,
47 !IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
48 drm_WARN_ON(&dev_priv->drm,
49 IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv));
50 /* WPT is LPT compatible */
52 case INTEL_PCH_WPT_LP_DEVICE_ID_TYPE:
53 drm_dbg_kms(&dev_priv->drm, "Found WildcatPoint LP PCH\n");
54 drm_WARN_ON(&dev_priv->drm,
55 !IS_HASWELL(dev_priv) && !IS_BROADWELL(dev_priv));
56 drm_WARN_ON(&dev_priv->drm,
57 !IS_HSW_ULT(dev_priv) && !IS_BDW_ULT(dev_priv));
58 /* WPT is LPT compatible */
60 case INTEL_PCH_SPT_DEVICE_ID_TYPE:
61 drm_dbg_kms(&dev_priv->drm, "Found SunrisePoint PCH\n");
62 drm_WARN_ON(&dev_priv->drm,
63 !IS_SKYLAKE(dev_priv) && !IS_KABYLAKE(dev_priv));
65 case INTEL_PCH_SPT_LP_DEVICE_ID_TYPE:
66 drm_dbg_kms(&dev_priv->drm, "Found SunrisePoint LP PCH\n");
67 drm_WARN_ON(&dev_priv->drm,
68 !IS_SKYLAKE(dev_priv) &&
69 !IS_KABYLAKE(dev_priv) &&
70 !IS_COFFEELAKE(dev_priv) &&
71 !IS_COMETLAKE(dev_priv));
73 case INTEL_PCH_KBP_DEVICE_ID_TYPE:
74 drm_dbg_kms(&dev_priv->drm, "Found Kaby Lake PCH (KBP)\n");
75 drm_WARN_ON(&dev_priv->drm,
76 !IS_SKYLAKE(dev_priv) &&
77 !IS_KABYLAKE(dev_priv) &&
78 !IS_COFFEELAKE(dev_priv) &&
79 !IS_COMETLAKE(dev_priv));
80 /* KBP is SPT compatible */
82 case INTEL_PCH_CNP_DEVICE_ID_TYPE:
83 drm_dbg_kms(&dev_priv->drm, "Found Cannon Lake PCH (CNP)\n");
84 drm_WARN_ON(&dev_priv->drm,
85 !IS_COFFEELAKE(dev_priv) &&
86 !IS_COMETLAKE(dev_priv));
88 case INTEL_PCH_CNP_LP_DEVICE_ID_TYPE:
89 drm_dbg_kms(&dev_priv->drm,
90 "Found Cannon Lake LP PCH (CNP-LP)\n");
91 drm_WARN_ON(&dev_priv->drm,
92 !IS_COFFEELAKE(dev_priv) &&
93 !IS_COMETLAKE(dev_priv));
95 case INTEL_PCH_CMP_DEVICE_ID_TYPE:
96 case INTEL_PCH_CMP2_DEVICE_ID_TYPE:
97 drm_dbg_kms(&dev_priv->drm, "Found Comet Lake PCH (CMP)\n");
98 drm_WARN_ON(&dev_priv->drm,
99 !IS_COFFEELAKE(dev_priv) &&
100 !IS_COMETLAKE(dev_priv) &&
101 !IS_ROCKETLAKE(dev_priv));
102 /* CMP is CNP compatible */
104 case INTEL_PCH_CMP_V_DEVICE_ID_TYPE:
105 drm_dbg_kms(&dev_priv->drm, "Found Comet Lake V PCH (CMP-V)\n");
106 drm_WARN_ON(&dev_priv->drm,
107 !IS_COFFEELAKE(dev_priv) &&
108 !IS_COMETLAKE(dev_priv));
109 /* CMP-V is based on KBP, which is SPT compatible */
111 case INTEL_PCH_ICP_DEVICE_ID_TYPE:
112 case INTEL_PCH_ICP2_DEVICE_ID_TYPE:
113 drm_dbg_kms(&dev_priv->drm, "Found Ice Lake PCH\n");
114 drm_WARN_ON(&dev_priv->drm, !IS_ICELAKE(dev_priv));
116 case INTEL_PCH_MCC_DEVICE_ID_TYPE:
117 drm_dbg_kms(&dev_priv->drm, "Found Mule Creek Canyon PCH\n");
118 drm_WARN_ON(&dev_priv->drm, !IS_JSL_EHL(dev_priv));
119 /* MCC is TGP compatible */
121 case INTEL_PCH_TGP_DEVICE_ID_TYPE:
122 case INTEL_PCH_TGP2_DEVICE_ID_TYPE:
123 drm_dbg_kms(&dev_priv->drm, "Found Tiger Lake LP PCH\n");
124 drm_WARN_ON(&dev_priv->drm, !IS_TIGERLAKE(dev_priv) &&
125 !IS_ROCKETLAKE(dev_priv) &&
126 !IS_GEN9_BC(dev_priv));
128 case INTEL_PCH_JSP_DEVICE_ID_TYPE:
129 drm_dbg_kms(&dev_priv->drm, "Found Jasper Lake PCH\n");
130 drm_WARN_ON(&dev_priv->drm, !IS_JSL_EHL(dev_priv));
131 /* JSP is ICP compatible */
133 case INTEL_PCH_ADP_DEVICE_ID_TYPE:
134 case INTEL_PCH_ADP2_DEVICE_ID_TYPE:
135 case INTEL_PCH_ADP3_DEVICE_ID_TYPE:
136 case INTEL_PCH_ADP4_DEVICE_ID_TYPE:
137 drm_dbg_kms(&dev_priv->drm, "Found Alder Lake PCH\n");
138 drm_WARN_ON(&dev_priv->drm, !IS_ALDERLAKE_S(dev_priv) &&
139 !IS_ALDERLAKE_P(dev_priv));
146 static bool intel_is_virt_pch(unsigned short id,
147 unsigned short svendor, unsigned short sdevice)
149 return (id == INTEL_PCH_P2X_DEVICE_ID_TYPE ||
150 id == INTEL_PCH_P3X_DEVICE_ID_TYPE ||
151 (id == INTEL_PCH_QEMU_DEVICE_ID_TYPE &&
152 svendor == PCI_SUBVENDOR_ID_REDHAT_QUMRANET &&
153 sdevice == PCI_SUBDEVICE_ID_QEMU));
157 intel_virt_detect_pch(const struct drm_i915_private *dev_priv,
158 unsigned short *pch_id, enum intel_pch *pch_type)
160 unsigned short id = 0;
163 * In a virtualized passthrough environment we can be in a
164 * setup where the ISA bridge is not able to be passed through.
165 * In this case, a south bridge can be emulated and we have to
166 * make an educated guess as to which PCH is really there.
169 if (IS_ALDERLAKE_S(dev_priv) || IS_ALDERLAKE_P(dev_priv))
170 id = INTEL_PCH_ADP_DEVICE_ID_TYPE;
171 else if (IS_TIGERLAKE(dev_priv) || IS_ROCKETLAKE(dev_priv))
172 id = INTEL_PCH_TGP_DEVICE_ID_TYPE;
173 else if (IS_JSL_EHL(dev_priv))
174 id = INTEL_PCH_MCC_DEVICE_ID_TYPE;
175 else if (IS_ICELAKE(dev_priv))
176 id = INTEL_PCH_ICP_DEVICE_ID_TYPE;
177 else if (IS_COFFEELAKE(dev_priv) ||
178 IS_COMETLAKE(dev_priv))
179 id = INTEL_PCH_CNP_DEVICE_ID_TYPE;
180 else if (IS_KABYLAKE(dev_priv) || IS_SKYLAKE(dev_priv))
181 id = INTEL_PCH_SPT_DEVICE_ID_TYPE;
182 else if (IS_HSW_ULT(dev_priv) || IS_BDW_ULT(dev_priv))
183 id = INTEL_PCH_LPT_LP_DEVICE_ID_TYPE;
184 else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv))
185 id = INTEL_PCH_LPT_DEVICE_ID_TYPE;
186 else if (GRAPHICS_VER(dev_priv) == 6 || IS_IVYBRIDGE(dev_priv))
187 id = INTEL_PCH_CPT_DEVICE_ID_TYPE;
188 else if (GRAPHICS_VER(dev_priv) == 5)
189 id = INTEL_PCH_IBX_DEVICE_ID_TYPE;
192 drm_dbg_kms(&dev_priv->drm, "Assuming PCH ID %04x\n", id);
194 drm_dbg_kms(&dev_priv->drm, "Assuming no PCH\n");
196 *pch_type = intel_pch_type(dev_priv, id);
198 /* Sanity check virtual PCH id */
199 if (drm_WARN_ON(&dev_priv->drm,
200 id && *pch_type == PCH_NONE))
206 void intel_detect_pch(struct drm_i915_private *dev_priv)
208 struct pci_dev *pch = NULL;
210 enum intel_pch pch_type;
212 /* DG1 has south engine display on the same PCI device */
213 if (IS_DG1(dev_priv)) {
214 dev_priv->pch_type = PCH_DG1;
216 } else if (IS_DG2(dev_priv)) {
217 dev_priv->pch_type = PCH_DG2;
222 * The reason to probe ISA bridge instead of Dev31:Fun0 is to
223 * make graphics device passthrough work easy for VMM, that only
224 * need to expose ISA bridge to let driver know the real hardware
225 * underneath. This is a requirement from virtualization team.
227 * In some virtualized environments (e.g. XEN), there is irrelevant
228 * ISA bridge in the system. To work reliably, we should scan trhough
229 * all the ISA bridge devices and check for the first match, instead
230 * of only checking the first one.
232 while ((pch = pci_get_class(PCI_CLASS_BRIDGE_ISA << 8, pch))) {
233 if (pch->vendor != PCI_VENDOR_ID_INTEL)
236 id = pch->device & INTEL_PCH_DEVICE_ID_MASK;
238 pch_type = intel_pch_type(dev_priv, id);
239 if (pch_type != PCH_NONE) {
240 dev_priv->pch_type = pch_type;
241 dev_priv->pch_id = id;
243 } else if (intel_is_virt_pch(id, pch->subsystem_vendor,
244 pch->subsystem_device)) {
245 intel_virt_detect_pch(dev_priv, &id, &pch_type);
246 dev_priv->pch_type = pch_type;
247 dev_priv->pch_id = id;
253 * Use PCH_NOP (PCH but no South Display) for PCH platforms without
256 if (pch && !HAS_DISPLAY(dev_priv)) {
257 drm_dbg_kms(&dev_priv->drm,
258 "Display disabled, reverting to NOP PCH\n");
259 dev_priv->pch_type = PCH_NOP;
260 dev_priv->pch_id = 0;
262 if (i915_run_as_guest() && HAS_DISPLAY(dev_priv)) {
263 intel_virt_detect_pch(dev_priv, &id, &pch_type);
264 dev_priv->pch_type = pch_type;
265 dev_priv->pch_id = id;
267 drm_dbg_kms(&dev_priv->drm, "No PCH found.\n");