1 /* $NetBSD: intel_display_power.h,v 1.2 2021/12/18 23:45:29 riastradh Exp $ */
2
3 /* SPDX-License-Identifier: MIT */
4 /*
5 * Copyright © 2019 Intel Corporation
6 */
7
8 #ifndef __INTEL_DISPLAY_POWER_H__
9 #define __INTEL_DISPLAY_POWER_H__
10
11 #include "intel_display.h"
12 #include "intel_runtime_pm.h"
13 #include "i915_reg.h"
14
15 struct drm_i915_private;
16 struct intel_encoder;
17
18 enum intel_display_power_domain {
19 POWER_DOMAIN_DISPLAY_CORE,
20 POWER_DOMAIN_PIPE_A,
21 POWER_DOMAIN_PIPE_B,
22 POWER_DOMAIN_PIPE_C,
23 POWER_DOMAIN_PIPE_D,
24 POWER_DOMAIN_PIPE_A_PANEL_FITTER,
25 POWER_DOMAIN_PIPE_B_PANEL_FITTER,
26 POWER_DOMAIN_PIPE_C_PANEL_FITTER,
27 POWER_DOMAIN_PIPE_D_PANEL_FITTER,
28 POWER_DOMAIN_TRANSCODER_A,
29 POWER_DOMAIN_TRANSCODER_B,
30 POWER_DOMAIN_TRANSCODER_C,
31 POWER_DOMAIN_TRANSCODER_D,
32 POWER_DOMAIN_TRANSCODER_EDP,
33 /* VDSC/joining for eDP/DSI transcoder (ICL) or pipe A (TGL) */
34 POWER_DOMAIN_TRANSCODER_VDSC_PW2,
35 POWER_DOMAIN_TRANSCODER_DSI_A,
36 POWER_DOMAIN_TRANSCODER_DSI_C,
37 POWER_DOMAIN_PORT_DDI_A_LANES,
38 POWER_DOMAIN_PORT_DDI_B_LANES,
39 POWER_DOMAIN_PORT_DDI_C_LANES,
40 POWER_DOMAIN_PORT_DDI_D_LANES,
41 POWER_DOMAIN_PORT_DDI_E_LANES,
42 POWER_DOMAIN_PORT_DDI_F_LANES,
43 POWER_DOMAIN_PORT_DDI_G_LANES,
44 POWER_DOMAIN_PORT_DDI_H_LANES,
45 POWER_DOMAIN_PORT_DDI_I_LANES,
46 POWER_DOMAIN_PORT_DDI_A_IO,
47 POWER_DOMAIN_PORT_DDI_B_IO,
48 POWER_DOMAIN_PORT_DDI_C_IO,
49 POWER_DOMAIN_PORT_DDI_D_IO,
50 POWER_DOMAIN_PORT_DDI_E_IO,
51 POWER_DOMAIN_PORT_DDI_F_IO,
52 POWER_DOMAIN_PORT_DDI_G_IO,
53 POWER_DOMAIN_PORT_DDI_H_IO,
54 POWER_DOMAIN_PORT_DDI_I_IO,
55 POWER_DOMAIN_PORT_DSI,
56 POWER_DOMAIN_PORT_CRT,
57 POWER_DOMAIN_PORT_OTHER,
58 POWER_DOMAIN_VGA,
59 POWER_DOMAIN_AUDIO,
60 POWER_DOMAIN_AUX_A,
61 POWER_DOMAIN_AUX_B,
62 POWER_DOMAIN_AUX_C,
63 POWER_DOMAIN_AUX_D,
64 POWER_DOMAIN_AUX_E,
65 POWER_DOMAIN_AUX_F,
66 POWER_DOMAIN_AUX_G,
67 POWER_DOMAIN_AUX_H,
68 POWER_DOMAIN_AUX_I,
69 POWER_DOMAIN_AUX_IO_A,
70 POWER_DOMAIN_AUX_C_TBT,
71 POWER_DOMAIN_AUX_D_TBT,
72 POWER_DOMAIN_AUX_E_TBT,
73 POWER_DOMAIN_AUX_F_TBT,
74 POWER_DOMAIN_AUX_G_TBT,
75 POWER_DOMAIN_AUX_H_TBT,
76 POWER_DOMAIN_AUX_I_TBT,
77 POWER_DOMAIN_GMBUS,
78 POWER_DOMAIN_MODESET,
79 POWER_DOMAIN_GT_IRQ,
80 POWER_DOMAIN_DPLL_DC_OFF,
81 POWER_DOMAIN_INIT,
82
83 POWER_DOMAIN_NUM,
84 };
85
86 /*
87 * i915_power_well_id:
88 *
89 * IDs used to look up power wells. Power wells accessed directly bypassing
90 * the power domains framework must be assigned a unique ID. The rest of power
91 * wells must be assigned DISP_PW_ID_NONE.
92 */
93 enum i915_power_well_id {
94 DISP_PW_ID_NONE,
95
96 VLV_DISP_PW_DISP2D,
97 BXT_DISP_PW_DPIO_CMN_A,
98 VLV_DISP_PW_DPIO_CMN_BC,
99 GLK_DISP_PW_DPIO_CMN_C,
100 CHV_DISP_PW_DPIO_CMN_D,
101 HSW_DISP_PW_GLOBAL,
102 SKL_DISP_PW_MISC_IO,
103 SKL_DISP_PW_1,
104 SKL_DISP_PW_2,
105 SKL_DISP_DC_OFF,
106 };
107
108 #define POWER_DOMAIN_PIPE(pipe) ((pipe) + POWER_DOMAIN_PIPE_A)
109 #define POWER_DOMAIN_PIPE_PANEL_FITTER(pipe) \
110 ((pipe) + POWER_DOMAIN_PIPE_A_PANEL_FITTER)
111 #define POWER_DOMAIN_TRANSCODER(tran) \
112 ((tran) == TRANSCODER_EDP ? POWER_DOMAIN_TRANSCODER_EDP : \
113 (tran) + POWER_DOMAIN_TRANSCODER_A)
114
115 struct i915_power_well;
116
117 struct i915_power_well_ops {
118 /*
119 * Synchronize the well's hw state to match the current sw state, for
120 * example enable/disable it based on the current refcount. Called
121 * during driver init and resume time, possibly after first calling
122 * the enable/disable handlers.
123 */
124 void (*sync_hw)(struct drm_i915_private *dev_priv,
125 struct i915_power_well *power_well);
126 /*
127 * Enable the well and resources that depend on it (for example
128 * interrupts located on the well). Called after the 0->1 refcount
129 * transition.
130 */
131 void (*enable)(struct drm_i915_private *dev_priv,
132 struct i915_power_well *power_well);
133 /*
134 * Disable the well and resources that depend on it. Called after
135 * the 1->0 refcount transition.
136 */
137 void (*disable)(struct drm_i915_private *dev_priv,
138 struct i915_power_well *power_well);
139 /* Returns the hw enabled state. */
140 bool (*is_enabled)(struct drm_i915_private *dev_priv,
141 struct i915_power_well *power_well);
142 };
143
144 struct i915_power_well_regs {
145 i915_reg_t bios;
146 i915_reg_t driver;
147 i915_reg_t kvmr;
148 i915_reg_t debug;
149 };
150
151 /* Power well structure for haswell */
152 struct i915_power_well_desc {
153 const char *name;
154 bool always_on;
155 u64 domains;
156 /* unique identifier for this power well */
157 enum i915_power_well_id id;
158 /*
159 * Arbitraty data associated with this power well. Platform and power
160 * well specific.
161 */
162 union {
163 struct {
164 /*
165 * request/status flag index in the PUNIT power well
166 * control/status registers.
167 */
168 u8 idx;
169 } vlv;
170 struct {
171 enum dpio_phy phy;
172 } bxt;
173 struct {
174 const struct i915_power_well_regs *regs;
175 /*
176 * request/status flag index in the power well
177 * constrol/status registers.
178 */
179 u8 idx;
180 /* Mask of pipes whose IRQ logic is backed by the pw */
181 u8 irq_pipe_mask;
182 /* The pw is backing the VGA functionality */
183 bool has_vga:1;
184 bool has_fuses:1;
185 /*
186 * The pw is for an ICL+ TypeC PHY port in
187 * Thunderbolt mode.
188 */
189 bool is_tc_tbt:1;
190 } hsw;
191 };
192 const struct i915_power_well_ops *ops;
193 };
194
195 struct i915_power_well {
196 const struct i915_power_well_desc *desc;
197 /* power well enable/disable usage count */
198 int count;
199 /* cached hw enabled state */
200 bool hw_enabled;
201 };
202
203 struct i915_power_domains {
204 /*
205 * Power wells needed for initialization at driver init and suspend
206 * time are on. They are kept on until after the first modeset.
207 */
208 bool initializing;
209 bool display_core_suspended;
210 int power_well_count;
211
212 intel_wakeref_t wakeref;
213
214 struct mutex lock;
215 int domain_use_count[POWER_DOMAIN_NUM];
216
217 struct delayed_work async_put_work;
218 intel_wakeref_t async_put_wakeref;
219 u64 async_put_domains[2];
220
221 struct i915_power_well *power_wells;
222 };
223
224 #define for_each_power_domain(domain, mask) \
225 for ((domain) = 0; (domain) < POWER_DOMAIN_NUM; (domain)++) \
226 for_each_if(BIT_ULL(domain) & (mask))
227
228 #define for_each_power_well(__dev_priv, __power_well) \
229 for ((__power_well) = (__dev_priv)->power_domains.power_wells; \
230 (__power_well) - (__dev_priv)->power_domains.power_wells < \
231 (__dev_priv)->power_domains.power_well_count; \
232 (__power_well)++)
233
234 #define for_each_power_well_reverse(__dev_priv, __power_well) \
235 for ((__power_well) = (__dev_priv)->power_domains.power_wells + \
236 (__dev_priv)->power_domains.power_well_count - 1; \
237 (__power_well) - (__dev_priv)->power_domains.power_wells >= 0; \
238 (__power_well)--)
239
240 #define for_each_power_domain_well(__dev_priv, __power_well, __domain_mask) \
241 for_each_power_well(__dev_priv, __power_well) \
242 for_each_if((__power_well)->desc->domains & (__domain_mask))
243
244 #define for_each_power_domain_well_reverse(__dev_priv, __power_well, __domain_mask) \
245 for_each_power_well_reverse(__dev_priv, __power_well) \
246 for_each_if((__power_well)->desc->domains & (__domain_mask))
247
248 int intel_power_domains_init(struct drm_i915_private *dev_priv);
249 void intel_power_domains_cleanup(struct drm_i915_private *dev_priv);
250 void intel_power_domains_init_hw(struct drm_i915_private *dev_priv, bool resume);
251 void intel_power_domains_driver_remove(struct drm_i915_private *dev_priv);
252 void intel_power_domains_enable(struct drm_i915_private *dev_priv);
253 void intel_power_domains_disable(struct drm_i915_private *dev_priv);
254 void intel_power_domains_suspend(struct drm_i915_private *dev_priv,
255 enum i915_drm_suspend_mode);
256 void intel_power_domains_resume(struct drm_i915_private *dev_priv);
257
258 void intel_display_power_suspend_late(struct drm_i915_private *i915);
259 void intel_display_power_resume_early(struct drm_i915_private *i915);
260 void intel_display_power_suspend(struct drm_i915_private *i915);
261 void intel_display_power_resume(struct drm_i915_private *i915);
262 void intel_display_power_set_target_dc_state(struct drm_i915_private *dev_priv,
263 u32 state);
264
265 const char *
266 intel_display_power_domain_str(enum intel_display_power_domain domain);
267
268 bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
269 enum intel_display_power_domain domain);
270 bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
271 enum intel_display_power_domain domain);
272 intel_wakeref_t intel_display_power_get(struct drm_i915_private *dev_priv,
273 enum intel_display_power_domain domain);
274 intel_wakeref_t
275 intel_display_power_get_if_enabled(struct drm_i915_private *dev_priv,
276 enum intel_display_power_domain domain);
277 void intel_display_power_put_unchecked(struct drm_i915_private *dev_priv,
278 enum intel_display_power_domain domain);
279 void __intel_display_power_put_async(struct drm_i915_private *i915,
280 enum intel_display_power_domain domain,
281 intel_wakeref_t wakeref);
282 void intel_display_power_flush_work(struct drm_i915_private *i915);
283 #if IS_ENABLED(CONFIG_DRM_I915_DEBUG_RUNTIME_PM)
284 void intel_display_power_put(struct drm_i915_private *dev_priv,
285 enum intel_display_power_domain domain,
286 intel_wakeref_t wakeref);
287 static inline void
intel_display_power_put_async(struct drm_i915_private * i915,enum intel_display_power_domain domain,intel_wakeref_t wakeref)288 intel_display_power_put_async(struct drm_i915_private *i915,
289 enum intel_display_power_domain domain,
290 intel_wakeref_t wakeref)
291 {
292 __intel_display_power_put_async(i915, domain, wakeref);
293 }
294 #else
295 static inline void
intel_display_power_put(struct drm_i915_private * i915,enum intel_display_power_domain domain,intel_wakeref_t wakeref)296 intel_display_power_put(struct drm_i915_private *i915,
297 enum intel_display_power_domain domain,
298 intel_wakeref_t wakeref)
299 {
300 intel_display_power_put_unchecked(i915, domain);
301 }
302
303 static inline void
intel_display_power_put_async(struct drm_i915_private * i915,enum intel_display_power_domain domain,intel_wakeref_t wakeref)304 intel_display_power_put_async(struct drm_i915_private *i915,
305 enum intel_display_power_domain domain,
306 intel_wakeref_t wakeref)
307 {
308 __intel_display_power_put_async(i915, domain, -1);
309 }
310 #endif
311
312 #define with_intel_display_power(i915, domain, wf) \
313 for ((wf) = intel_display_power_get((i915), (domain)); (wf); \
314 intel_display_power_put_async((i915), (domain), (wf)), (wf) = 0)
315
316 void icl_dbuf_slices_update(struct drm_i915_private *dev_priv,
317 u8 req_slices);
318
319 void chv_phy_powergate_lanes(struct intel_encoder *encoder,
320 bool override, unsigned int mask);
321 bool chv_phy_powergate_ch(struct drm_i915_private *dev_priv, enum dpio_phy phy,
322 enum dpio_channel ch, bool override);
323
324 #endif /* __INTEL_DISPLAY_POWER_H__ */
325