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0bc12bcb RV |
1 | /* |
2 | * Copyright © 2014 Intel Corporation | |
3 | * | |
4 | * Permission is hereby granted, free of charge, to any person obtaining a | |
5 | * copy of this software and associated documentation files (the "Software"), | |
6 | * to deal in the Software without restriction, including without limitation | |
7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
8 | * and/or sell copies of the Software, and to permit persons to whom the | |
9 | * Software is furnished to do so, subject to the following conditions: | |
10 | * | |
11 | * The above copyright notice and this permission notice (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
21 | * DEALINGS IN THE SOFTWARE. | |
22 | */ | |
23 | ||
b2b89f55 RV |
24 | /** |
25 | * DOC: Panel Self Refresh (PSR/SRD) | |
26 | * | |
27 | * Since Haswell Display controller supports Panel Self-Refresh on display | |
28 | * panels witch have a remote frame buffer (RFB) implemented according to PSR | |
29 | * spec in eDP1.3. PSR feature allows the display to go to lower standby states | |
30 | * when system is idle but display is on as it eliminates display refresh | |
31 | * request to DDR memory completely as long as the frame buffer for that | |
32 | * display is unchanged. | |
33 | * | |
34 | * Panel Self Refresh must be supported by both Hardware (source) and | |
35 | * Panel (sink). | |
36 | * | |
37 | * PSR saves power by caching the framebuffer in the panel RFB, which allows us | |
38 | * to power down the link and memory controller. For DSI panels the same idea | |
39 | * is called "manual mode". | |
40 | * | |
41 | * The implementation uses the hardware-based PSR support which automatically | |
42 | * enters/exits self-refresh mode. The hardware takes care of sending the | |
43 | * required DP aux message and could even retrain the link (that part isn't | |
44 | * enabled yet though). The hardware also keeps track of any frontbuffer | |
45 | * changes to know when to exit self-refresh mode again. Unfortunately that | |
46 | * part doesn't work too well, hence why the i915 PSR support uses the | |
47 | * software frontbuffer tracking to make sure it doesn't miss a screen | |
48 | * update. For this integration intel_psr_invalidate() and intel_psr_flush() | |
49 | * get called by the frontbuffer tracking code. Note that because of locking | |
50 | * issues the self-refresh re-enable code is done from a work queue, which | |
51 | * must be correctly synchronized/cancelled when shutting down the pipe." | |
52 | */ | |
53 | ||
23ec9f52 JRS |
54 | #include <drm/drmP.h> |
55 | #include <drm/drm_atomic_helper.h> | |
0bc12bcb RV |
56 | |
57 | #include "intel_drv.h" | |
58 | #include "i915_drv.h" | |
59 | ||
c44301fc ML |
60 | static bool psr_global_enabled(u32 debug) |
61 | { | |
62 | switch (debug & I915_PSR_DEBUG_MODE_MASK) { | |
63 | case I915_PSR_DEBUG_DEFAULT: | |
64 | return i915_modparams.enable_psr; | |
65 | case I915_PSR_DEBUG_DISABLE: | |
66 | return false; | |
67 | default: | |
68 | return true; | |
69 | } | |
70 | } | |
71 | ||
2ac45bdd ML |
72 | static bool intel_psr2_enabled(struct drm_i915_private *dev_priv, |
73 | const struct intel_crtc_state *crtc_state) | |
74 | { | |
8228c42f MN |
75 | /* Cannot enable DSC and PSR2 simultaneously */ |
76 | WARN_ON(crtc_state->dsc_params.compression_enable && | |
77 | crtc_state->has_psr2); | |
78 | ||
2ac45bdd | 79 | switch (dev_priv->psr.debug & I915_PSR_DEBUG_MODE_MASK) { |
235ca26f | 80 | case I915_PSR_DEBUG_DISABLE: |
2ac45bdd ML |
81 | case I915_PSR_DEBUG_FORCE_PSR1: |
82 | return false; | |
235ca26f JRS |
83 | case I915_PSR_DEBUG_DEFAULT: |
84 | if (i915_modparams.enable_psr <= 0) | |
85 | return false; | |
2ac45bdd ML |
86 | default: |
87 | return crtc_state->has_psr2; | |
88 | } | |
89 | } | |
90 | ||
c0871805 ID |
91 | static int edp_psr_shift(enum transcoder cpu_transcoder) |
92 | { | |
93 | switch (cpu_transcoder) { | |
94 | case TRANSCODER_A: | |
95 | return EDP_PSR_TRANSCODER_A_SHIFT; | |
96 | case TRANSCODER_B: | |
97 | return EDP_PSR_TRANSCODER_B_SHIFT; | |
98 | case TRANSCODER_C: | |
99 | return EDP_PSR_TRANSCODER_C_SHIFT; | |
100 | default: | |
101 | MISSING_CASE(cpu_transcoder); | |
102 | /* fallthrough */ | |
103 | case TRANSCODER_EDP: | |
104 | return EDP_PSR_TRANSCODER_EDP_SHIFT; | |
105 | } | |
106 | } | |
107 | ||
1aeb1b5f | 108 | void intel_psr_irq_control(struct drm_i915_private *dev_priv, u32 debug) |
54fd3149 DP |
109 | { |
110 | u32 debug_mask, mask; | |
c0871805 ID |
111 | enum transcoder cpu_transcoder; |
112 | u32 transcoders = BIT(TRANSCODER_EDP); | |
54fd3149 | 113 | |
c0871805 ID |
114 | if (INTEL_GEN(dev_priv) >= 8) |
115 | transcoders |= BIT(TRANSCODER_A) | | |
116 | BIT(TRANSCODER_B) | | |
117 | BIT(TRANSCODER_C); | |
118 | ||
119 | debug_mask = 0; | |
120 | mask = 0; | |
121 | for_each_cpu_transcoder_masked(dev_priv, cpu_transcoder, transcoders) { | |
122 | int shift = edp_psr_shift(cpu_transcoder); | |
123 | ||
124 | mask |= EDP_PSR_ERROR(shift); | |
125 | debug_mask |= EDP_PSR_POST_EXIT(shift) | | |
126 | EDP_PSR_PRE_ENTRY(shift); | |
54fd3149 DP |
127 | } |
128 | ||
1aeb1b5f | 129 | if (debug & I915_PSR_DEBUG_IRQ) |
54fd3149 DP |
130 | mask |= debug_mask; |
131 | ||
54fd3149 DP |
132 | I915_WRITE(EDP_PSR_IMR, ~mask); |
133 | } | |
134 | ||
bc18b4df JRS |
135 | static void psr_event_print(u32 val, bool psr2_enabled) |
136 | { | |
137 | DRM_DEBUG_KMS("PSR exit events: 0x%x\n", val); | |
138 | if (val & PSR_EVENT_PSR2_WD_TIMER_EXPIRE) | |
139 | DRM_DEBUG_KMS("\tPSR2 watchdog timer expired\n"); | |
140 | if ((val & PSR_EVENT_PSR2_DISABLED) && psr2_enabled) | |
141 | DRM_DEBUG_KMS("\tPSR2 disabled\n"); | |
142 | if (val & PSR_EVENT_SU_DIRTY_FIFO_UNDERRUN) | |
143 | DRM_DEBUG_KMS("\tSU dirty FIFO underrun\n"); | |
144 | if (val & PSR_EVENT_SU_CRC_FIFO_UNDERRUN) | |
145 | DRM_DEBUG_KMS("\tSU CRC FIFO underrun\n"); | |
146 | if (val & PSR_EVENT_GRAPHICS_RESET) | |
147 | DRM_DEBUG_KMS("\tGraphics reset\n"); | |
148 | if (val & PSR_EVENT_PCH_INTERRUPT) | |
149 | DRM_DEBUG_KMS("\tPCH interrupt\n"); | |
150 | if (val & PSR_EVENT_MEMORY_UP) | |
151 | DRM_DEBUG_KMS("\tMemory up\n"); | |
152 | if (val & PSR_EVENT_FRONT_BUFFER_MODIFY) | |
153 | DRM_DEBUG_KMS("\tFront buffer modification\n"); | |
154 | if (val & PSR_EVENT_WD_TIMER_EXPIRE) | |
155 | DRM_DEBUG_KMS("\tPSR watchdog timer expired\n"); | |
156 | if (val & PSR_EVENT_PIPE_REGISTERS_UPDATE) | |
157 | DRM_DEBUG_KMS("\tPIPE registers updated\n"); | |
158 | if (val & PSR_EVENT_REGISTER_UPDATE) | |
159 | DRM_DEBUG_KMS("\tRegister updated\n"); | |
160 | if (val & PSR_EVENT_HDCP_ENABLE) | |
161 | DRM_DEBUG_KMS("\tHDCP enabled\n"); | |
162 | if (val & PSR_EVENT_KVMR_SESSION_ENABLE) | |
163 | DRM_DEBUG_KMS("\tKVMR session enabled\n"); | |
164 | if (val & PSR_EVENT_VBI_ENABLE) | |
165 | DRM_DEBUG_KMS("\tVBI enabled\n"); | |
166 | if (val & PSR_EVENT_LPSP_MODE_EXIT) | |
167 | DRM_DEBUG_KMS("\tLPSP mode exited\n"); | |
168 | if ((val & PSR_EVENT_PSR_DISABLE) && !psr2_enabled) | |
169 | DRM_DEBUG_KMS("\tPSR disabled\n"); | |
170 | } | |
171 | ||
54fd3149 DP |
172 | void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir) |
173 | { | |
174 | u32 transcoders = BIT(TRANSCODER_EDP); | |
175 | enum transcoder cpu_transcoder; | |
3f983e54 | 176 | ktime_t time_ns = ktime_get(); |
183b8e67 | 177 | u32 mask = 0; |
54fd3149 DP |
178 | |
179 | if (INTEL_GEN(dev_priv) >= 8) | |
180 | transcoders |= BIT(TRANSCODER_A) | | |
181 | BIT(TRANSCODER_B) | | |
182 | BIT(TRANSCODER_C); | |
183 | ||
184 | for_each_cpu_transcoder_masked(dev_priv, cpu_transcoder, transcoders) { | |
c0871805 ID |
185 | int shift = edp_psr_shift(cpu_transcoder); |
186 | ||
183b8e67 JRS |
187 | if (psr_iir & EDP_PSR_ERROR(shift)) { |
188 | DRM_WARN("[transcoder %s] PSR aux error\n", | |
189 | transcoder_name(cpu_transcoder)); | |
190 | ||
191 | dev_priv->psr.irq_aux_error = true; | |
192 | ||
193 | /* | |
194 | * If this interruption is not masked it will keep | |
195 | * interrupting so fast that it prevents the scheduled | |
196 | * work to run. | |
197 | * Also after a PSR error, we don't want to arm PSR | |
198 | * again so we don't care about unmask the interruption | |
199 | * or unset irq_aux_error. | |
200 | */ | |
201 | mask |= EDP_PSR_ERROR(shift); | |
202 | } | |
54fd3149 | 203 | |
c0871805 | 204 | if (psr_iir & EDP_PSR_PRE_ENTRY(shift)) { |
3f983e54 | 205 | dev_priv->psr.last_entry_attempt = time_ns; |
54fd3149 DP |
206 | DRM_DEBUG_KMS("[transcoder %s] PSR entry attempt in 2 vblanks\n", |
207 | transcoder_name(cpu_transcoder)); | |
3f983e54 | 208 | } |
54fd3149 | 209 | |
c0871805 | 210 | if (psr_iir & EDP_PSR_POST_EXIT(shift)) { |
3f983e54 | 211 | dev_priv->psr.last_exit = time_ns; |
54fd3149 DP |
212 | DRM_DEBUG_KMS("[transcoder %s] PSR exit completed\n", |
213 | transcoder_name(cpu_transcoder)); | |
bc18b4df JRS |
214 | |
215 | if (INTEL_GEN(dev_priv) >= 9) { | |
216 | u32 val = I915_READ(PSR_EVENT(cpu_transcoder)); | |
217 | bool psr2_enabled = dev_priv->psr.psr2_enabled; | |
218 | ||
219 | I915_WRITE(PSR_EVENT(cpu_transcoder), val); | |
220 | psr_event_print(val, psr2_enabled); | |
221 | } | |
3f983e54 | 222 | } |
54fd3149 | 223 | } |
183b8e67 JRS |
224 | |
225 | if (mask) { | |
226 | mask |= I915_READ(EDP_PSR_IMR); | |
227 | I915_WRITE(EDP_PSR_IMR, mask); | |
228 | ||
229 | schedule_work(&dev_priv->psr.work); | |
230 | } | |
54fd3149 DP |
231 | } |
232 | ||
77fe36ff DP |
233 | static bool intel_dp_get_colorimetry_status(struct intel_dp *intel_dp) |
234 | { | |
739f3abd | 235 | u8 dprx = 0; |
77fe36ff DP |
236 | |
237 | if (drm_dp_dpcd_readb(&intel_dp->aux, DP_DPRX_FEATURE_ENUMERATION_LIST, | |
238 | &dprx) != 1) | |
239 | return false; | |
240 | return dprx & DP_VSC_SDP_EXT_FOR_COLORIMETRY_SUPPORTED; | |
241 | } | |
242 | ||
243 | static bool intel_dp_get_alpm_status(struct intel_dp *intel_dp) | |
244 | { | |
739f3abd | 245 | u8 alpm_caps = 0; |
77fe36ff DP |
246 | |
247 | if (drm_dp_dpcd_readb(&intel_dp->aux, DP_RECEIVER_ALPM_CAP, | |
248 | &alpm_caps) != 1) | |
249 | return false; | |
250 | return alpm_caps & DP_ALPM_CAP; | |
251 | } | |
252 | ||
26e5378d JRS |
253 | static u8 intel_dp_get_sink_sync_latency(struct intel_dp *intel_dp) |
254 | { | |
264ff016 | 255 | u8 val = 8; /* assume the worst if we can't read the value */ |
26e5378d JRS |
256 | |
257 | if (drm_dp_dpcd_readb(&intel_dp->aux, | |
258 | DP_SYNCHRONIZATION_LATENCY_IN_SINK, &val) == 1) | |
259 | val &= DP_MAX_RESYNC_FRAME_COUNT_MASK; | |
260 | else | |
264ff016 | 261 | DRM_DEBUG_KMS("Unable to get sink synchronization latency, assuming 8 frames\n"); |
26e5378d JRS |
262 | return val; |
263 | } | |
264 | ||
8c0d2c29 JRS |
265 | static u16 intel_dp_get_su_x_granulartiy(struct intel_dp *intel_dp) |
266 | { | |
267 | u16 val; | |
268 | ssize_t r; | |
269 | ||
270 | /* | |
271 | * Returning the default X granularity if granularity not required or | |
272 | * if DPCD read fails | |
273 | */ | |
274 | if (!(intel_dp->psr_dpcd[1] & DP_PSR2_SU_GRANULARITY_REQUIRED)) | |
275 | return 4; | |
276 | ||
277 | r = drm_dp_dpcd_read(&intel_dp->aux, DP_PSR2_SU_X_GRANULARITY, &val, 2); | |
278 | if (r != 2) | |
279 | DRM_DEBUG_KMS("Unable to read DP_PSR2_SU_X_GRANULARITY\n"); | |
280 | ||
281 | /* | |
282 | * Spec says that if the value read is 0 the default granularity should | |
283 | * be used instead. | |
284 | */ | |
285 | if (r != 2 || val == 0) | |
286 | val = 4; | |
287 | ||
288 | return val; | |
289 | } | |
290 | ||
77fe36ff DP |
291 | void intel_psr_init_dpcd(struct intel_dp *intel_dp) |
292 | { | |
293 | struct drm_i915_private *dev_priv = | |
294 | to_i915(dp_to_dig_port(intel_dp)->base.base.dev); | |
295 | ||
296 | drm_dp_dpcd_read(&intel_dp->aux, DP_PSR_SUPPORT, intel_dp->psr_dpcd, | |
297 | sizeof(intel_dp->psr_dpcd)); | |
298 | ||
8cf6da7e DP |
299 | if (!intel_dp->psr_dpcd[0]) |
300 | return; | |
8cf6da7e DP |
301 | DRM_DEBUG_KMS("eDP panel supports PSR version %x\n", |
302 | intel_dp->psr_dpcd[0]); | |
84bb2916 | 303 | |
7c5c641a JRS |
304 | if (drm_dp_has_quirk(&intel_dp->desc, DP_DPCD_QUIRK_NO_PSR)) { |
305 | DRM_DEBUG_KMS("PSR support not currently available for this panel\n"); | |
306 | return; | |
307 | } | |
308 | ||
84bb2916 DP |
309 | if (!(intel_dp->edp_dpcd[1] & DP_EDP_SET_POWER_CAP)) { |
310 | DRM_DEBUG_KMS("Panel lacks power state control, PSR cannot be enabled\n"); | |
311 | return; | |
312 | } | |
7c5c641a | 313 | |
8cf6da7e | 314 | dev_priv->psr.sink_support = true; |
a3db1428 DP |
315 | dev_priv->psr.sink_sync_latency = |
316 | intel_dp_get_sink_sync_latency(intel_dp); | |
77fe36ff | 317 | |
c44301fc ML |
318 | WARN_ON(dev_priv->psr.dp); |
319 | dev_priv->psr.dp = intel_dp; | |
320 | ||
77fe36ff | 321 | if (INTEL_GEN(dev_priv) >= 9 && |
aee3bac0 | 322 | (intel_dp->psr_dpcd[0] == DP_PSR2_WITH_Y_COORD_IS_SUPPORTED)) { |
97c9de66 DP |
323 | bool y_req = intel_dp->psr_dpcd[1] & |
324 | DP_PSR2_SU_Y_COORDINATE_REQUIRED; | |
325 | bool alpm = intel_dp_get_alpm_status(intel_dp); | |
326 | ||
aee3bac0 JRS |
327 | /* |
328 | * All panels that supports PSR version 03h (PSR2 + | |
329 | * Y-coordinate) can handle Y-coordinates in VSC but we are | |
330 | * only sure that it is going to be used when required by the | |
331 | * panel. This way panel is capable to do selective update | |
332 | * without a aux frame sync. | |
333 | * | |
334 | * To support PSR version 02h and PSR version 03h without | |
335 | * Y-coordinate requirement panels we would need to enable | |
336 | * GTC first. | |
337 | */ | |
97c9de66 | 338 | dev_priv->psr.sink_psr2_support = y_req && alpm; |
8cf6da7e DP |
339 | DRM_DEBUG_KMS("PSR2 %ssupported\n", |
340 | dev_priv->psr.sink_psr2_support ? "" : "not "); | |
77fe36ff | 341 | |
95f28d2e | 342 | if (dev_priv->psr.sink_psr2_support) { |
77fe36ff DP |
343 | dev_priv->psr.colorimetry_support = |
344 | intel_dp_get_colorimetry_status(intel_dp); | |
8c0d2c29 JRS |
345 | dev_priv->psr.su_x_granularity = |
346 | intel_dp_get_su_x_granulartiy(intel_dp); | |
77fe36ff DP |
347 | } |
348 | } | |
349 | } | |
350 | ||
cf5d862d RV |
351 | static void intel_psr_setup_vsc(struct intel_dp *intel_dp, |
352 | const struct intel_crtc_state *crtc_state) | |
474d1ec4 | 353 | { |
97da2ef4 | 354 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); |
1895759e | 355 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
d2419ffc | 356 | struct edp_vsc_psr psr_vsc; |
474d1ec4 | 357 | |
95f28d2e | 358 | if (dev_priv->psr.psr2_enabled) { |
2ce4df87 RV |
359 | /* Prepare VSC Header for SU as per EDP 1.4 spec, Table 6.11 */ |
360 | memset(&psr_vsc, 0, sizeof(psr_vsc)); | |
361 | psr_vsc.sdp_header.HB0 = 0; | |
362 | psr_vsc.sdp_header.HB1 = 0x7; | |
aee3bac0 | 363 | if (dev_priv->psr.colorimetry_support) { |
2ce4df87 RV |
364 | psr_vsc.sdp_header.HB2 = 0x5; |
365 | psr_vsc.sdp_header.HB3 = 0x13; | |
aee3bac0 | 366 | } else { |
2ce4df87 RV |
367 | psr_vsc.sdp_header.HB2 = 0x4; |
368 | psr_vsc.sdp_header.HB3 = 0xe; | |
2ce4df87 | 369 | } |
97da2ef4 | 370 | } else { |
2ce4df87 RV |
371 | /* Prepare VSC packet as per EDP 1.3 spec, Table 3.10 */ |
372 | memset(&psr_vsc, 0, sizeof(psr_vsc)); | |
373 | psr_vsc.sdp_header.HB0 = 0; | |
374 | psr_vsc.sdp_header.HB1 = 0x7; | |
375 | psr_vsc.sdp_header.HB2 = 0x2; | |
376 | psr_vsc.sdp_header.HB3 = 0x8; | |
97da2ef4 NV |
377 | } |
378 | ||
790ea70c VS |
379 | intel_dig_port->write_infoframe(&intel_dig_port->base, |
380 | crtc_state, | |
1d776538 | 381 | DP_SDP_VSC, &psr_vsc, sizeof(psr_vsc)); |
474d1ec4 SJ |
382 | } |
383 | ||
b90eed08 | 384 | static void hsw_psr_setup_aux(struct intel_dp *intel_dp) |
0bc12bcb | 385 | { |
1895759e | 386 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
d544e918 DP |
387 | u32 aux_clock_divider, aux_ctl; |
388 | int i; | |
739f3abd | 389 | static const u8 aux_msg[] = { |
0bc12bcb RV |
390 | [0] = DP_AUX_NATIVE_WRITE << 4, |
391 | [1] = DP_SET_POWER >> 8, | |
392 | [2] = DP_SET_POWER & 0xff, | |
393 | [3] = 1 - 1, | |
394 | [4] = DP_SET_POWER_D0, | |
395 | }; | |
d544e918 DP |
396 | u32 psr_aux_mask = EDP_PSR_AUX_CTL_TIME_OUT_MASK | |
397 | EDP_PSR_AUX_CTL_MESSAGE_SIZE_MASK | | |
398 | EDP_PSR_AUX_CTL_PRECHARGE_2US_MASK | | |
399 | EDP_PSR_AUX_CTL_BIT_CLOCK_2X_MASK; | |
0bc12bcb RV |
400 | |
401 | BUILD_BUG_ON(sizeof(aux_msg) > 20); | |
b90eed08 | 402 | for (i = 0; i < sizeof(aux_msg); i += 4) |
d544e918 | 403 | I915_WRITE(EDP_PSR_AUX_DATA(i >> 2), |
b90eed08 DP |
404 | intel_dp_pack_aux(&aux_msg[i], sizeof(aux_msg) - i)); |
405 | ||
d544e918 DP |
406 | aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, 0); |
407 | ||
408 | /* Start with bits set for DDI_AUX_CTL register */ | |
8a29c778 | 409 | aux_ctl = intel_dp->get_aux_send_ctl(intel_dp, sizeof(aux_msg), |
b90eed08 | 410 | aux_clock_divider); |
d544e918 DP |
411 | |
412 | /* Select only valid bits for SRD_AUX_CTL */ | |
413 | aux_ctl &= psr_aux_mask; | |
414 | I915_WRITE(EDP_PSR_AUX_CTL, aux_ctl); | |
b90eed08 DP |
415 | } |
416 | ||
cf5d862d | 417 | static void intel_psr_enable_sink(struct intel_dp *intel_dp) |
b90eed08 | 418 | { |
1895759e | 419 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
4df4925b | 420 | u8 dpcd_val = DP_PSR_ENABLE; |
b90eed08 | 421 | |
340c93c0 | 422 | /* Enable ALPM at sink for psr2 */ |
97c9de66 DP |
423 | if (dev_priv->psr.psr2_enabled) { |
424 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_RECEIVER_ALPM_CONFIG, | |
425 | DP_ALPM_ENABLE); | |
98751b8c | 426 | dpcd_val |= DP_PSR_ENABLE_PSR2 | DP_PSR_IRQ_HPD_WITH_CRC_ERRORS; |
60cae442 JRS |
427 | } else { |
428 | if (dev_priv->psr.link_standby) | |
429 | dpcd_val |= DP_PSR_MAIN_LINK_ACTIVE; | |
de570946 JRS |
430 | |
431 | if (INTEL_GEN(dev_priv) >= 8) | |
432 | dpcd_val |= DP_PSR_CRC_VERIFICATION; | |
97c9de66 DP |
433 | } |
434 | ||
4df4925b | 435 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, dpcd_val); |
6f32ea7e | 436 | |
d544e918 | 437 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, DP_SET_POWER_D0); |
0bc12bcb RV |
438 | } |
439 | ||
ed63d24b | 440 | static void hsw_activate_psr1(struct intel_dp *intel_dp) |
0bc12bcb | 441 | { |
1895759e | 442 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
a3db1428 DP |
443 | u32 max_sleep_time = 0x1f; |
444 | u32 val = EDP_PSR_ENABLE; | |
474d1ec4 | 445 | |
a3db1428 DP |
446 | /* Let's use 6 as the minimum to cover all known cases including the |
447 | * off-by-one issue that HW has in some cases. | |
d44b4dcb | 448 | */ |
a3db1428 | 449 | int idle_frames = max(6, dev_priv->vbt.psr.idle_frames); |
50db1390 | 450 | |
a3db1428 DP |
451 | /* sink_sync_latency of 8 means source has to wait for more than 8 |
452 | * frames, we'll go with 9 frames for now | |
453 | */ | |
454 | idle_frames = max(idle_frames, dev_priv->psr.sink_sync_latency + 1); | |
50db1390 | 455 | val |= idle_frames << EDP_PSR_IDLE_FRAME_SHIFT; |
7370c68d | 456 | |
a3db1428 | 457 | val |= max_sleep_time << EDP_PSR_MAX_SLEEP_TIME_SHIFT; |
772c2a51 | 458 | if (IS_HASWELL(dev_priv)) |
7370c68d | 459 | val |= EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES; |
0bc12bcb | 460 | |
60e5ffe3 RV |
461 | if (dev_priv->psr.link_standby) |
462 | val |= EDP_PSR_LINK_STANDBY; | |
463 | ||
77312ae8 VN |
464 | if (dev_priv->vbt.psr.tp1_wakeup_time_us == 0) |
465 | val |= EDP_PSR_TP1_TIME_0us; | |
466 | else if (dev_priv->vbt.psr.tp1_wakeup_time_us <= 100) | |
50db1390 | 467 | val |= EDP_PSR_TP1_TIME_100us; |
77312ae8 VN |
468 | else if (dev_priv->vbt.psr.tp1_wakeup_time_us <= 500) |
469 | val |= EDP_PSR_TP1_TIME_500us; | |
50db1390 | 470 | else |
77312ae8 | 471 | val |= EDP_PSR_TP1_TIME_2500us; |
50db1390 | 472 | |
77312ae8 VN |
473 | if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us == 0) |
474 | val |= EDP_PSR_TP2_TP3_TIME_0us; | |
475 | else if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us <= 100) | |
50db1390 | 476 | val |= EDP_PSR_TP2_TP3_TIME_100us; |
77312ae8 VN |
477 | else if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us <= 500) |
478 | val |= EDP_PSR_TP2_TP3_TIME_500us; | |
50db1390 | 479 | else |
77312ae8 | 480 | val |= EDP_PSR_TP2_TP3_TIME_2500us; |
50db1390 DV |
481 | |
482 | if (intel_dp_source_supports_hbr2(intel_dp) && | |
483 | drm_dp_tps3_supported(intel_dp->dpcd)) | |
484 | val |= EDP_PSR_TP1_TP3_SEL; | |
485 | else | |
486 | val |= EDP_PSR_TP1_TP2_SEL; | |
487 | ||
00c8f194 JRS |
488 | if (INTEL_GEN(dev_priv) >= 8) |
489 | val |= EDP_PSR_CRC_ENABLE; | |
490 | ||
912d6412 | 491 | val |= I915_READ(EDP_PSR_CTL) & EDP_PSR_RESTORE_PSR_ACTIVE_CTX_MASK; |
50db1390 | 492 | I915_WRITE(EDP_PSR_CTL, val); |
3fcb0ca1 | 493 | } |
50db1390 | 494 | |
ed63d24b | 495 | static void hsw_activate_psr2(struct intel_dp *intel_dp) |
3fcb0ca1 | 496 | { |
1895759e | 497 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
a3db1428 DP |
498 | u32 val; |
499 | ||
500 | /* Let's use 6 as the minimum to cover all known cases including the | |
501 | * off-by-one issue that HW has in some cases. | |
3fcb0ca1 | 502 | */ |
a3db1428 DP |
503 | int idle_frames = max(6, dev_priv->vbt.psr.idle_frames); |
504 | ||
505 | idle_frames = max(idle_frames, dev_priv->psr.sink_sync_latency + 1); | |
506 | val = idle_frames << EDP_PSR2_IDLE_FRAME_SHIFT; | |
50db1390 | 507 | |
5e87325f | 508 | val |= EDP_PSR2_ENABLE | EDP_SU_TRACK_ENABLE; |
2a34b005 JRS |
509 | if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) |
510 | val |= EDP_Y_COORDINATE_ENABLE; | |
977da084 | 511 | |
26e5378d | 512 | val |= EDP_PSR2_FRAME_BEFORE_SU(dev_priv->psr.sink_sync_latency + 1); |
50db1390 | 513 | |
77312ae8 VN |
514 | if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us >= 0 && |
515 | dev_priv->vbt.psr.tp2_tp3_wakeup_time_us <= 50) | |
516 | val |= EDP_PSR2_TP2_TIME_50us; | |
517 | else if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us <= 100) | |
518 | val |= EDP_PSR2_TP2_TIME_100us; | |
519 | else if (dev_priv->vbt.psr.tp2_tp3_wakeup_time_us <= 500) | |
520 | val |= EDP_PSR2_TP2_TIME_500us; | |
50db1390 | 521 | else |
77312ae8 | 522 | val |= EDP_PSR2_TP2_TIME_2500us; |
474d1ec4 | 523 | |
50db1390 | 524 | I915_WRITE(EDP_PSR2_CTL, val); |
0bc12bcb RV |
525 | } |
526 | ||
c4932d79 RV |
527 | static bool intel_psr2_config_valid(struct intel_dp *intel_dp, |
528 | struct intel_crtc_state *crtc_state) | |
529 | { | |
1895759e | 530 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
c90c275c DP |
531 | int crtc_hdisplay = crtc_state->base.adjusted_mode.crtc_hdisplay; |
532 | int crtc_vdisplay = crtc_state->base.adjusted_mode.crtc_vdisplay; | |
533 | int psr_max_h = 0, psr_max_v = 0; | |
c4932d79 | 534 | |
95f28d2e | 535 | if (!dev_priv->psr.sink_psr2_support) |
c4932d79 RV |
536 | return false; |
537 | ||
8228c42f MN |
538 | /* |
539 | * DSC and PSR2 cannot be enabled simultaneously. If a requested | |
540 | * resolution requires DSC to be enabled, priority is given to DSC | |
541 | * over PSR2. | |
542 | */ | |
543 | if (crtc_state->dsc_params.compression_enable) { | |
544 | DRM_DEBUG_KMS("PSR2 cannot be enabled since DSC is enabled\n"); | |
545 | return false; | |
546 | } | |
547 | ||
c90c275c DP |
548 | if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) { |
549 | psr_max_h = 4096; | |
550 | psr_max_v = 2304; | |
cf819eff | 551 | } else if (IS_GEN(dev_priv, 9)) { |
c90c275c DP |
552 | psr_max_h = 3640; |
553 | psr_max_v = 2304; | |
554 | } | |
555 | ||
556 | if (crtc_hdisplay > psr_max_h || crtc_vdisplay > psr_max_v) { | |
557 | DRM_DEBUG_KMS("PSR2 not enabled, resolution %dx%d > max supported %dx%d\n", | |
558 | crtc_hdisplay, crtc_vdisplay, | |
559 | psr_max_h, psr_max_v); | |
c4932d79 RV |
560 | return false; |
561 | } | |
562 | ||
bef5e5b3 JRS |
563 | /* |
564 | * HW sends SU blocks of size four scan lines, which means the starting | |
565 | * X coordinate and Y granularity requirements will always be met. We | |
8c0d2c29 JRS |
566 | * only need to validate the SU block width is a multiple of |
567 | * x granularity. | |
bef5e5b3 | 568 | */ |
8c0d2c29 JRS |
569 | if (crtc_hdisplay % dev_priv->psr.su_x_granularity) { |
570 | DRM_DEBUG_KMS("PSR2 not enabled, hdisplay(%d) not multiple of %d\n", | |
571 | crtc_hdisplay, dev_priv->psr.su_x_granularity); | |
bef5e5b3 JRS |
572 | return false; |
573 | } | |
574 | ||
618cf883 JRS |
575 | if (crtc_state->crc_enabled) { |
576 | DRM_DEBUG_KMS("PSR2 not enabled because it would inhibit pipe CRC calculation\n"); | |
577 | return false; | |
578 | } | |
579 | ||
c4932d79 RV |
580 | return true; |
581 | } | |
582 | ||
4d90f2d5 VS |
583 | void intel_psr_compute_config(struct intel_dp *intel_dp, |
584 | struct intel_crtc_state *crtc_state) | |
0bc12bcb RV |
585 | { |
586 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
1895759e | 587 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
dfd2e9ab | 588 | const struct drm_display_mode *adjusted_mode = |
4d90f2d5 | 589 | &crtc_state->base.adjusted_mode; |
dfd2e9ab | 590 | int psr_setup_time; |
0bc12bcb | 591 | |
4371d896 | 592 | if (!CAN_PSR(dev_priv)) |
4d90f2d5 VS |
593 | return; |
594 | ||
c44301fc | 595 | if (intel_dp != dev_priv->psr.dp) |
4d90f2d5 | 596 | return; |
0bc12bcb | 597 | |
dc9b5a0c RV |
598 | /* |
599 | * HSW spec explicitly says PSR is tied to port A. | |
600 | * BDW+ platforms with DDI implementation of PSR have different | |
601 | * PSR registers per transcoder and we only implement transcoder EDP | |
602 | * ones. Since by Display design transcoder EDP is tied to port A | |
603 | * we can safely escape based on the port A. | |
604 | */ | |
ce3508fd | 605 | if (dig_port->base.port != PORT_A) { |
dc9b5a0c | 606 | DRM_DEBUG_KMS("PSR condition failed: Port not supported\n"); |
4d90f2d5 | 607 | return; |
0bc12bcb RV |
608 | } |
609 | ||
50a12d8f JRS |
610 | if (dev_priv->psr.sink_not_reliable) { |
611 | DRM_DEBUG_KMS("PSR sink implementation is not reliable\n"); | |
612 | return; | |
613 | } | |
614 | ||
772c2a51 | 615 | if (IS_HASWELL(dev_priv) && |
dfd2e9ab | 616 | adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) { |
0bc12bcb | 617 | DRM_DEBUG_KMS("PSR condition failed: Interlaced is Enabled\n"); |
4d90f2d5 | 618 | return; |
0bc12bcb RV |
619 | } |
620 | ||
dfd2e9ab VS |
621 | psr_setup_time = drm_dp_psr_setup_time(intel_dp->psr_dpcd); |
622 | if (psr_setup_time < 0) { | |
623 | DRM_DEBUG_KMS("PSR condition failed: Invalid PSR setup time (0x%02x)\n", | |
624 | intel_dp->psr_dpcd[1]); | |
4d90f2d5 | 625 | return; |
dfd2e9ab VS |
626 | } |
627 | ||
628 | if (intel_usecs_to_scanlines(adjusted_mode, psr_setup_time) > | |
629 | adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vdisplay - 1) { | |
630 | DRM_DEBUG_KMS("PSR condition failed: PSR setup time (%d us) too long\n", | |
631 | psr_setup_time); | |
4d90f2d5 VS |
632 | return; |
633 | } | |
634 | ||
4d90f2d5 | 635 | crtc_state->has_psr = true; |
c4932d79 | 636 | crtc_state->has_psr2 = intel_psr2_config_valid(intel_dp, crtc_state); |
0bc12bcb RV |
637 | } |
638 | ||
e2bbc343 | 639 | static void intel_psr_activate(struct intel_dp *intel_dp) |
0bc12bcb | 640 | { |
1895759e | 641 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
0bc12bcb | 642 | |
bcc233b2 | 643 | if (INTEL_GEN(dev_priv) >= 9) |
3fcb0ca1 | 644 | WARN_ON(I915_READ(EDP_PSR2_CTL) & EDP_PSR2_ENABLE); |
bcc233b2 | 645 | WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE); |
0bc12bcb RV |
646 | WARN_ON(dev_priv->psr.active); |
647 | lockdep_assert_held(&dev_priv->psr.lock); | |
648 | ||
cf5d862d RV |
649 | /* psr1 and psr2 are mutually exclusive.*/ |
650 | if (dev_priv->psr.psr2_enabled) | |
651 | hsw_activate_psr2(intel_dp); | |
652 | else | |
653 | hsw_activate_psr1(intel_dp); | |
654 | ||
0bc12bcb RV |
655 | dev_priv->psr.active = true; |
656 | } | |
657 | ||
8f19b401 ID |
658 | static i915_reg_t gen9_chicken_trans_reg(struct drm_i915_private *dev_priv, |
659 | enum transcoder cpu_transcoder) | |
660 | { | |
661 | static const i915_reg_t regs[] = { | |
662 | [TRANSCODER_A] = CHICKEN_TRANS_A, | |
663 | [TRANSCODER_B] = CHICKEN_TRANS_B, | |
664 | [TRANSCODER_C] = CHICKEN_TRANS_C, | |
665 | [TRANSCODER_EDP] = CHICKEN_TRANS_EDP, | |
666 | }; | |
667 | ||
668 | WARN_ON(INTEL_GEN(dev_priv) < 9); | |
669 | ||
670 | if (WARN_ON(cpu_transcoder >= ARRAY_SIZE(regs) || | |
671 | !regs[cpu_transcoder].reg)) | |
672 | cpu_transcoder = TRANSCODER_A; | |
673 | ||
674 | return regs[cpu_transcoder]; | |
675 | } | |
676 | ||
cf5d862d RV |
677 | static void intel_psr_enable_source(struct intel_dp *intel_dp, |
678 | const struct intel_crtc_state *crtc_state) | |
4d1fa22f | 679 | { |
1895759e | 680 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
4d1fa22f | 681 | enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; |
fc6ff9dc | 682 | u32 mask; |
4d1fa22f | 683 | |
d544e918 DP |
684 | /* Only HSW and BDW have PSR AUX registers that need to be setup. SKL+ |
685 | * use hardcoded values PSR AUX transactions | |
686 | */ | |
687 | if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) | |
688 | hsw_psr_setup_aux(intel_dp); | |
689 | ||
cf819eff | 690 | if (dev_priv->psr.psr2_enabled && (IS_GEN(dev_priv, 9) && |
d15f9cdd | 691 | !IS_GEMINILAKE(dev_priv))) { |
8f19b401 ID |
692 | i915_reg_t reg = gen9_chicken_trans_reg(dev_priv, |
693 | cpu_transcoder); | |
694 | u32 chicken = I915_READ(reg); | |
5e87325f | 695 | |
d15f9cdd JRS |
696 | chicken |= PSR2_VSC_ENABLE_PROG_HEADER | |
697 | PSR2_ADD_VERTICAL_LINE_COUNT; | |
8f19b401 | 698 | I915_WRITE(reg, chicken); |
4d1fa22f | 699 | } |
bf80928f JRS |
700 | |
701 | /* | |
702 | * Per Spec: Avoid continuous PSR exit by masking MEMUP and HPD also | |
703 | * mask LPSP to avoid dependency on other drivers that might block | |
704 | * runtime_pm besides preventing other hw tracking issues now we | |
705 | * can rely on frontbuffer tracking. | |
706 | */ | |
fc6ff9dc JRS |
707 | mask = EDP_PSR_DEBUG_MASK_MEMUP | |
708 | EDP_PSR_DEBUG_MASK_HPD | | |
709 | EDP_PSR_DEBUG_MASK_LPSP | | |
710 | EDP_PSR_DEBUG_MASK_MAX_SLEEP; | |
711 | ||
712 | if (INTEL_GEN(dev_priv) < 11) | |
713 | mask |= EDP_PSR_DEBUG_MASK_DISP_REG_WRITE; | |
714 | ||
715 | I915_WRITE(EDP_PSR_DEBUG, mask); | |
4d1fa22f RV |
716 | } |
717 | ||
c44301fc ML |
718 | static void intel_psr_enable_locked(struct drm_i915_private *dev_priv, |
719 | const struct intel_crtc_state *crtc_state) | |
720 | { | |
721 | struct intel_dp *intel_dp = dev_priv->psr.dp; | |
722 | ||
23ec9f52 JRS |
723 | WARN_ON(dev_priv->psr.enabled); |
724 | ||
725 | dev_priv->psr.psr2_enabled = intel_psr2_enabled(dev_priv, crtc_state); | |
726 | dev_priv->psr.busy_frontbuffer_bits = 0; | |
727 | dev_priv->psr.pipe = to_intel_crtc(crtc_state->base.crtc)->pipe; | |
c44301fc ML |
728 | |
729 | DRM_DEBUG_KMS("Enabling PSR%s\n", | |
730 | dev_priv->psr.psr2_enabled ? "2" : "1"); | |
731 | intel_psr_setup_vsc(intel_dp, crtc_state); | |
732 | intel_psr_enable_sink(intel_dp); | |
733 | intel_psr_enable_source(intel_dp, crtc_state); | |
734 | dev_priv->psr.enabled = true; | |
735 | ||
736 | intel_psr_activate(intel_dp); | |
737 | } | |
738 | ||
b2b89f55 RV |
739 | /** |
740 | * intel_psr_enable - Enable PSR | |
741 | * @intel_dp: Intel DP | |
d2419ffc | 742 | * @crtc_state: new CRTC state |
b2b89f55 RV |
743 | * |
744 | * This function can only be called after the pipe is fully trained and enabled. | |
745 | */ | |
d2419ffc VS |
746 | void intel_psr_enable(struct intel_dp *intel_dp, |
747 | const struct intel_crtc_state *crtc_state) | |
0bc12bcb | 748 | { |
1895759e | 749 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
0bc12bcb | 750 | |
4d90f2d5 | 751 | if (!crtc_state->has_psr) |
0bc12bcb | 752 | return; |
0bc12bcb | 753 | |
c9ef291a DP |
754 | if (WARN_ON(!CAN_PSR(dev_priv))) |
755 | return; | |
756 | ||
da83ef85 | 757 | WARN_ON(dev_priv->drrs.dp); |
c44301fc | 758 | |
0bc12bcb | 759 | mutex_lock(&dev_priv->psr.lock); |
23ec9f52 JRS |
760 | |
761 | if (!psr_global_enabled(dev_priv->psr.debug)) { | |
762 | DRM_DEBUG_KMS("PSR disabled by flag\n"); | |
0bc12bcb RV |
763 | goto unlock; |
764 | } | |
765 | ||
23ec9f52 | 766 | intel_psr_enable_locked(dev_priv, crtc_state); |
d0ac896a | 767 | |
0bc12bcb RV |
768 | unlock: |
769 | mutex_unlock(&dev_priv->psr.lock); | |
770 | } | |
771 | ||
26f9ec9a JRS |
772 | static void intel_psr_exit(struct drm_i915_private *dev_priv) |
773 | { | |
774 | u32 val; | |
775 | ||
b2fc2252 JRS |
776 | if (!dev_priv->psr.active) { |
777 | if (INTEL_GEN(dev_priv) >= 9) | |
778 | WARN_ON(I915_READ(EDP_PSR2_CTL) & EDP_PSR2_ENABLE); | |
779 | WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE); | |
26f9ec9a | 780 | return; |
b2fc2252 | 781 | } |
26f9ec9a JRS |
782 | |
783 | if (dev_priv->psr.psr2_enabled) { | |
784 | val = I915_READ(EDP_PSR2_CTL); | |
785 | WARN_ON(!(val & EDP_PSR2_ENABLE)); | |
786 | I915_WRITE(EDP_PSR2_CTL, val & ~EDP_PSR2_ENABLE); | |
787 | } else { | |
788 | val = I915_READ(EDP_PSR_CTL); | |
789 | WARN_ON(!(val & EDP_PSR_ENABLE)); | |
790 | I915_WRITE(EDP_PSR_CTL, val & ~EDP_PSR_ENABLE); | |
791 | } | |
792 | dev_priv->psr.active = false; | |
793 | } | |
794 | ||
2ee936e3 | 795 | static void intel_psr_disable_locked(struct intel_dp *intel_dp) |
e2bbc343 | 796 | { |
1895759e | 797 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
b2fc2252 JRS |
798 | i915_reg_t psr_status; |
799 | u32 psr_status_mask; | |
0bc12bcb | 800 | |
2ee936e3 JRS |
801 | lockdep_assert_held(&dev_priv->psr.lock); |
802 | ||
803 | if (!dev_priv->psr.enabled) | |
804 | return; | |
805 | ||
806 | DRM_DEBUG_KMS("Disabling PSR%s\n", | |
807 | dev_priv->psr.psr2_enabled ? "2" : "1"); | |
808 | ||
b2fc2252 | 809 | intel_psr_exit(dev_priv); |
77affa31 | 810 | |
b2fc2252 JRS |
811 | if (dev_priv->psr.psr2_enabled) { |
812 | psr_status = EDP_PSR2_STATUS; | |
813 | psr_status_mask = EDP_PSR2_STATUS_STATE_MASK; | |
0bc12bcb | 814 | } else { |
b2fc2252 JRS |
815 | psr_status = EDP_PSR_STATUS; |
816 | psr_status_mask = EDP_PSR_STATUS_STATE_MASK; | |
0bc12bcb | 817 | } |
b2fc2252 JRS |
818 | |
819 | /* Wait till PSR is idle */ | |
820 | if (intel_wait_for_register(dev_priv, psr_status, psr_status_mask, 0, | |
821 | 2000)) | |
822 | DRM_ERROR("Timed out waiting PSR idle state\n"); | |
cc3054ff JRS |
823 | |
824 | /* Disable PSR on Sink */ | |
825 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, 0); | |
826 | ||
c44301fc | 827 | dev_priv->psr.enabled = false; |
cc3054ff JRS |
828 | } |
829 | ||
e2bbc343 RV |
830 | /** |
831 | * intel_psr_disable - Disable PSR | |
832 | * @intel_dp: Intel DP | |
d2419ffc | 833 | * @old_crtc_state: old CRTC state |
e2bbc343 RV |
834 | * |
835 | * This function needs to be called before disabling pipe. | |
836 | */ | |
d2419ffc VS |
837 | void intel_psr_disable(struct intel_dp *intel_dp, |
838 | const struct intel_crtc_state *old_crtc_state) | |
e2bbc343 | 839 | { |
1895759e | 840 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
e2bbc343 | 841 | |
4d90f2d5 | 842 | if (!old_crtc_state->has_psr) |
0f328da6 RV |
843 | return; |
844 | ||
c9ef291a DP |
845 | if (WARN_ON(!CAN_PSR(dev_priv))) |
846 | return; | |
847 | ||
e2bbc343 | 848 | mutex_lock(&dev_priv->psr.lock); |
c44301fc | 849 | |
cc3054ff | 850 | intel_psr_disable_locked(intel_dp); |
c44301fc | 851 | |
0bc12bcb | 852 | mutex_unlock(&dev_priv->psr.lock); |
98fa2aec | 853 | cancel_work_sync(&dev_priv->psr.work); |
0bc12bcb RV |
854 | } |
855 | ||
23ec9f52 JRS |
856 | /** |
857 | * intel_psr_update - Update PSR state | |
858 | * @intel_dp: Intel DP | |
859 | * @crtc_state: new CRTC state | |
860 | * | |
861 | * This functions will update PSR states, disabling, enabling or switching PSR | |
862 | * version when executing fastsets. For full modeset, intel_psr_disable() and | |
863 | * intel_psr_enable() should be called instead. | |
864 | */ | |
865 | void intel_psr_update(struct intel_dp *intel_dp, | |
866 | const struct intel_crtc_state *crtc_state) | |
867 | { | |
868 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); | |
869 | struct i915_psr *psr = &dev_priv->psr; | |
870 | bool enable, psr2_enable; | |
871 | ||
872 | if (!CAN_PSR(dev_priv) || READ_ONCE(psr->dp) != intel_dp) | |
873 | return; | |
874 | ||
875 | mutex_lock(&dev_priv->psr.lock); | |
876 | ||
877 | enable = crtc_state->has_psr && psr_global_enabled(psr->debug); | |
878 | psr2_enable = intel_psr2_enabled(dev_priv, crtc_state); | |
879 | ||
880 | if (enable == psr->enabled && psr2_enable == psr->psr2_enabled) | |
881 | goto unlock; | |
882 | ||
883 | if (psr->enabled) { | |
884 | if (!enable || psr2_enable != psr->psr2_enabled) | |
885 | intel_psr_disable_locked(intel_dp); | |
886 | } | |
887 | ||
888 | if (enable) { | |
889 | if (!psr->enabled || psr2_enable != psr->psr2_enabled) | |
890 | intel_psr_enable_locked(dev_priv, crtc_state); | |
891 | } | |
892 | ||
893 | unlock: | |
894 | mutex_unlock(&dev_priv->psr.lock); | |
895 | } | |
896 | ||
65df9c79 DP |
897 | /** |
898 | * intel_psr_wait_for_idle - wait for PSR1 to idle | |
899 | * @new_crtc_state: new CRTC state | |
900 | * @out_value: PSR status in case of failure | |
901 | * | |
902 | * This function is expected to be called from pipe_update_start() where it is | |
903 | * not expected to race with PSR enable or disable. | |
904 | * | |
905 | * Returns: 0 on success or -ETIMEOUT if PSR status does not idle. | |
906 | */ | |
63ec132d DP |
907 | int intel_psr_wait_for_idle(const struct intel_crtc_state *new_crtc_state, |
908 | u32 *out_value) | |
c43dbcbb | 909 | { |
c3d43361 TV |
910 | struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->base.crtc); |
911 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); | |
c43dbcbb | 912 | |
c44301fc | 913 | if (!dev_priv->psr.enabled || !new_crtc_state->has_psr) |
c3d43361 TV |
914 | return 0; |
915 | ||
fd255f6e DP |
916 | /* FIXME: Update this for PSR2 if we need to wait for idle */ |
917 | if (READ_ONCE(dev_priv->psr.psr2_enabled)) | |
918 | return 0; | |
c43dbcbb TV |
919 | |
920 | /* | |
65df9c79 DP |
921 | * From bspec: Panel Self Refresh (BDW+) |
922 | * Max. time for PSR to idle = Inverse of the refresh rate + 6 ms of | |
923 | * exit training time + 1.5 ms of aux channel handshake. 50 ms is | |
924 | * defensive enough to cover everything. | |
c43dbcbb | 925 | */ |
63ec132d | 926 | |
fd255f6e DP |
927 | return __intel_wait_for_register(dev_priv, EDP_PSR_STATUS, |
928 | EDP_PSR_STATUS_STATE_MASK, | |
63ec132d DP |
929 | EDP_PSR_STATUS_STATE_IDLE, 2, 50, |
930 | out_value); | |
c43dbcbb TV |
931 | } |
932 | ||
933 | static bool __psr_wait_for_idle_locked(struct drm_i915_private *dev_priv) | |
0bc12bcb | 934 | { |
daeb725e CW |
935 | i915_reg_t reg; |
936 | u32 mask; | |
937 | int err; | |
938 | ||
c44301fc | 939 | if (!dev_priv->psr.enabled) |
daeb725e | 940 | return false; |
0bc12bcb | 941 | |
ce3508fd DP |
942 | if (dev_priv->psr.psr2_enabled) { |
943 | reg = EDP_PSR2_STATUS; | |
944 | mask = EDP_PSR2_STATUS_STATE_MASK; | |
995d3047 | 945 | } else { |
ce3508fd DP |
946 | reg = EDP_PSR_STATUS; |
947 | mask = EDP_PSR_STATUS_STATE_MASK; | |
0bc12bcb | 948 | } |
daeb725e CW |
949 | |
950 | mutex_unlock(&dev_priv->psr.lock); | |
951 | ||
952 | err = intel_wait_for_register(dev_priv, reg, mask, 0, 50); | |
953 | if (err) | |
954 | DRM_ERROR("Timed out waiting for PSR Idle for re-enable\n"); | |
955 | ||
956 | /* After the unlocked wait, verify that PSR is still wanted! */ | |
0bc12bcb | 957 | mutex_lock(&dev_priv->psr.lock); |
daeb725e CW |
958 | return err == 0 && dev_priv->psr.enabled; |
959 | } | |
0bc12bcb | 960 | |
23ec9f52 | 961 | static int intel_psr_fastset_force(struct drm_i915_private *dev_priv) |
2ac45bdd | 962 | { |
23ec9f52 JRS |
963 | struct drm_device *dev = &dev_priv->drm; |
964 | struct drm_modeset_acquire_ctx ctx; | |
965 | struct drm_atomic_state *state; | |
966 | struct drm_crtc *crtc; | |
967 | int err; | |
2ac45bdd | 968 | |
23ec9f52 JRS |
969 | state = drm_atomic_state_alloc(dev); |
970 | if (!state) | |
971 | return -ENOMEM; | |
2ac45bdd | 972 | |
23ec9f52 JRS |
973 | drm_modeset_acquire_init(&ctx, DRM_MODESET_ACQUIRE_INTERRUPTIBLE); |
974 | state->acquire_ctx = &ctx; | |
975 | ||
976 | retry: | |
977 | drm_for_each_crtc(crtc, dev) { | |
978 | struct drm_crtc_state *crtc_state; | |
979 | struct intel_crtc_state *intel_crtc_state; | |
980 | ||
981 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
982 | if (IS_ERR(crtc_state)) { | |
983 | err = PTR_ERR(crtc_state); | |
984 | goto error; | |
985 | } | |
986 | ||
987 | intel_crtc_state = to_intel_crtc_state(crtc_state); | |
988 | ||
458e0977 | 989 | if (crtc_state->active && intel_crtc_state->has_psr) { |
23ec9f52 JRS |
990 | /* Mark mode as changed to trigger a pipe->update() */ |
991 | crtc_state->mode_changed = true; | |
992 | break; | |
993 | } | |
994 | } | |
995 | ||
996 | err = drm_atomic_commit(state); | |
2ac45bdd | 997 | |
23ec9f52 JRS |
998 | error: |
999 | if (err == -EDEADLK) { | |
1000 | drm_atomic_state_clear(state); | |
1001 | err = drm_modeset_backoff(&ctx); | |
1002 | if (!err) | |
1003 | goto retry; | |
1004 | } | |
1005 | ||
1006 | drm_modeset_drop_locks(&ctx); | |
1007 | drm_modeset_acquire_fini(&ctx); | |
1008 | drm_atomic_state_put(state); | |
1009 | ||
1010 | return err; | |
2ac45bdd ML |
1011 | } |
1012 | ||
23ec9f52 | 1013 | int intel_psr_debug_set(struct drm_i915_private *dev_priv, u64 val) |
c44301fc | 1014 | { |
23ec9f52 JRS |
1015 | const u32 mode = val & I915_PSR_DEBUG_MODE_MASK; |
1016 | u32 old_mode; | |
c44301fc | 1017 | int ret; |
c44301fc ML |
1018 | |
1019 | if (val & ~(I915_PSR_DEBUG_IRQ | I915_PSR_DEBUG_MODE_MASK) || | |
2ac45bdd | 1020 | mode > I915_PSR_DEBUG_FORCE_PSR1) { |
c44301fc ML |
1021 | DRM_DEBUG_KMS("Invalid debug mask %llx\n", val); |
1022 | return -EINVAL; | |
1023 | } | |
1024 | ||
c44301fc ML |
1025 | ret = mutex_lock_interruptible(&dev_priv->psr.lock); |
1026 | if (ret) | |
1027 | return ret; | |
1028 | ||
23ec9f52 | 1029 | old_mode = dev_priv->psr.debug & I915_PSR_DEBUG_MODE_MASK; |
c44301fc | 1030 | dev_priv->psr.debug = val; |
1aeb1b5f | 1031 | intel_psr_irq_control(dev_priv, dev_priv->psr.debug); |
c44301fc | 1032 | |
c44301fc | 1033 | mutex_unlock(&dev_priv->psr.lock); |
23ec9f52 JRS |
1034 | |
1035 | if (old_mode != mode) | |
1036 | ret = intel_psr_fastset_force(dev_priv); | |
1037 | ||
c44301fc ML |
1038 | return ret; |
1039 | } | |
1040 | ||
183b8e67 JRS |
1041 | static void intel_psr_handle_irq(struct drm_i915_private *dev_priv) |
1042 | { | |
1043 | struct i915_psr *psr = &dev_priv->psr; | |
1044 | ||
1045 | intel_psr_disable_locked(psr->dp); | |
1046 | psr->sink_not_reliable = true; | |
1047 | /* let's make sure that sink is awaken */ | |
1048 | drm_dp_dpcd_writeb(&psr->dp->aux, DP_SET_POWER, DP_SET_POWER_D0); | |
1049 | } | |
1050 | ||
daeb725e CW |
1051 | static void intel_psr_work(struct work_struct *work) |
1052 | { | |
1053 | struct drm_i915_private *dev_priv = | |
5422b37c | 1054 | container_of(work, typeof(*dev_priv), psr.work); |
daeb725e CW |
1055 | |
1056 | mutex_lock(&dev_priv->psr.lock); | |
1057 | ||
5422b37c RV |
1058 | if (!dev_priv->psr.enabled) |
1059 | goto unlock; | |
1060 | ||
183b8e67 JRS |
1061 | if (READ_ONCE(dev_priv->psr.irq_aux_error)) |
1062 | intel_psr_handle_irq(dev_priv); | |
1063 | ||
daeb725e CW |
1064 | /* |
1065 | * We have to make sure PSR is ready for re-enable | |
1066 | * otherwise it keeps disabled until next full enable/disable cycle. | |
1067 | * PSR might take some time to get fully disabled | |
1068 | * and be ready for re-enable. | |
1069 | */ | |
c43dbcbb | 1070 | if (!__psr_wait_for_idle_locked(dev_priv)) |
0bc12bcb RV |
1071 | goto unlock; |
1072 | ||
1073 | /* | |
1074 | * The delayed work can race with an invalidate hence we need to | |
1075 | * recheck. Since psr_flush first clears this and then reschedules we | |
1076 | * won't ever miss a flush when bailing out here. | |
1077 | */ | |
c12e0643 | 1078 | if (dev_priv->psr.busy_frontbuffer_bits || dev_priv->psr.active) |
0bc12bcb RV |
1079 | goto unlock; |
1080 | ||
c44301fc | 1081 | intel_psr_activate(dev_priv->psr.dp); |
0bc12bcb RV |
1082 | unlock: |
1083 | mutex_unlock(&dev_priv->psr.lock); | |
1084 | } | |
1085 | ||
b2b89f55 RV |
1086 | /** |
1087 | * intel_psr_invalidate - Invalidade PSR | |
5748b6a1 | 1088 | * @dev_priv: i915 device |
b2b89f55 | 1089 | * @frontbuffer_bits: frontbuffer plane tracking bits |
5baf63cc | 1090 | * @origin: which operation caused the invalidate |
b2b89f55 RV |
1091 | * |
1092 | * Since the hardware frontbuffer tracking has gaps we need to integrate | |
1093 | * with the software frontbuffer tracking. This function gets called every | |
1094 | * time frontbuffer rendering starts and a buffer gets dirtied. PSR must be | |
1095 | * disabled if the frontbuffer mask contains a buffer relevant to PSR. | |
1096 | * | |
1097 | * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits." | |
1098 | */ | |
5748b6a1 | 1099 | void intel_psr_invalidate(struct drm_i915_private *dev_priv, |
5baf63cc | 1100 | unsigned frontbuffer_bits, enum fb_op_origin origin) |
0bc12bcb | 1101 | { |
4371d896 | 1102 | if (!CAN_PSR(dev_priv)) |
0f328da6 RV |
1103 | return; |
1104 | ||
ce3508fd | 1105 | if (origin == ORIGIN_FLIP) |
5baf63cc RV |
1106 | return; |
1107 | ||
0bc12bcb RV |
1108 | mutex_lock(&dev_priv->psr.lock); |
1109 | if (!dev_priv->psr.enabled) { | |
1110 | mutex_unlock(&dev_priv->psr.lock); | |
1111 | return; | |
1112 | } | |
1113 | ||
f0ad62a6 | 1114 | frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(dev_priv->psr.pipe); |
0bc12bcb | 1115 | dev_priv->psr.busy_frontbuffer_bits |= frontbuffer_bits; |
ec76d629 DV |
1116 | |
1117 | if (frontbuffer_bits) | |
5748b6a1 | 1118 | intel_psr_exit(dev_priv); |
ec76d629 | 1119 | |
0bc12bcb RV |
1120 | mutex_unlock(&dev_priv->psr.lock); |
1121 | } | |
1122 | ||
b2b89f55 RV |
1123 | /** |
1124 | * intel_psr_flush - Flush PSR | |
5748b6a1 | 1125 | * @dev_priv: i915 device |
b2b89f55 | 1126 | * @frontbuffer_bits: frontbuffer plane tracking bits |
169de131 | 1127 | * @origin: which operation caused the flush |
b2b89f55 RV |
1128 | * |
1129 | * Since the hardware frontbuffer tracking has gaps we need to integrate | |
1130 | * with the software frontbuffer tracking. This function gets called every | |
1131 | * time frontbuffer rendering has completed and flushed out to memory. PSR | |
1132 | * can be enabled again if no other frontbuffer relevant to PSR is dirty. | |
1133 | * | |
1134 | * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits. | |
1135 | */ | |
5748b6a1 | 1136 | void intel_psr_flush(struct drm_i915_private *dev_priv, |
169de131 | 1137 | unsigned frontbuffer_bits, enum fb_op_origin origin) |
0bc12bcb | 1138 | { |
4371d896 | 1139 | if (!CAN_PSR(dev_priv)) |
0f328da6 RV |
1140 | return; |
1141 | ||
ce3508fd | 1142 | if (origin == ORIGIN_FLIP) |
5baf63cc RV |
1143 | return; |
1144 | ||
0bc12bcb RV |
1145 | mutex_lock(&dev_priv->psr.lock); |
1146 | if (!dev_priv->psr.enabled) { | |
1147 | mutex_unlock(&dev_priv->psr.lock); | |
1148 | return; | |
1149 | } | |
1150 | ||
f0ad62a6 | 1151 | frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(dev_priv->psr.pipe); |
0bc12bcb RV |
1152 | dev_priv->psr.busy_frontbuffer_bits &= ~frontbuffer_bits; |
1153 | ||
921ec285 | 1154 | /* By definition flush = invalidate + flush */ |
caa1fd66 | 1155 | if (frontbuffer_bits) { |
66231d14 JRS |
1156 | /* |
1157 | * Display WA #0884: all | |
1158 | * This documented WA for bxt can be safely applied | |
1159 | * broadly so we can force HW tracking to exit PSR | |
1160 | * instead of disabling and re-enabling. | |
1161 | * Workaround tells us to write 0 to CUR_SURFLIVE_A, | |
1162 | * but it makes more sense write to the current active | |
1163 | * pipe. | |
1164 | */ | |
f0ad62a6 | 1165 | I915_WRITE(CURSURFLIVE(dev_priv->psr.pipe), 0); |
caa1fd66 | 1166 | } |
995d3047 | 1167 | |
0bc12bcb | 1168 | if (!dev_priv->psr.active && !dev_priv->psr.busy_frontbuffer_bits) |
5422b37c | 1169 | schedule_work(&dev_priv->psr.work); |
0bc12bcb RV |
1170 | mutex_unlock(&dev_priv->psr.lock); |
1171 | } | |
1172 | ||
b2b89f55 RV |
1173 | /** |
1174 | * intel_psr_init - Init basic PSR work and mutex. | |
93de056b | 1175 | * @dev_priv: i915 device private |
b2b89f55 RV |
1176 | * |
1177 | * This function is called only once at driver load to initialize basic | |
1178 | * PSR stuff. | |
1179 | */ | |
c39055b0 | 1180 | void intel_psr_init(struct drm_i915_private *dev_priv) |
0bc12bcb | 1181 | { |
888bf84d JRS |
1182 | u32 val; |
1183 | ||
0f328da6 RV |
1184 | if (!HAS_PSR(dev_priv)) |
1185 | return; | |
1186 | ||
443a389f VS |
1187 | dev_priv->psr_mmio_base = IS_HASWELL(dev_priv) ? |
1188 | HSW_EDP_PSR_BASE : BDW_EDP_PSR_BASE; | |
1189 | ||
c9ef291a DP |
1190 | if (!dev_priv->psr.sink_support) |
1191 | return; | |
1192 | ||
598c6cfe DP |
1193 | if (i915_modparams.enable_psr == -1) |
1194 | if (INTEL_GEN(dev_priv) < 9 || !dev_priv->vbt.psr.enable) | |
1195 | i915_modparams.enable_psr = 0; | |
d94d6e87 | 1196 | |
888bf84d JRS |
1197 | /* |
1198 | * If a PSR error happened and the driver is reloaded, the EDP_PSR_IIR | |
1199 | * will still keep the error set even after the reset done in the | |
1200 | * irq_preinstall and irq_uninstall hooks. | |
1201 | * And enabling in this situation cause the screen to freeze in the | |
1202 | * first time that PSR HW tries to activate so lets keep PSR disabled | |
1203 | * to avoid any rendering problems. | |
1204 | */ | |
1205 | val = I915_READ(EDP_PSR_IIR); | |
1206 | val &= EDP_PSR_ERROR(edp_psr_shift(TRANSCODER_EDP)); | |
1207 | if (val) { | |
1208 | DRM_DEBUG_KMS("PSR interruption error set\n"); | |
1209 | dev_priv->psr.sink_not_reliable = true; | |
1210 | return; | |
1211 | } | |
1212 | ||
65f61b42 | 1213 | /* Set link_standby x link_off defaults */ |
8652744b | 1214 | if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) |
60e5ffe3 RV |
1215 | /* HSW and BDW require workarounds that we don't implement. */ |
1216 | dev_priv->psr.link_standby = false; | |
60e5ffe3 RV |
1217 | else |
1218 | /* For new platforms let's respect VBT back again */ | |
1219 | dev_priv->psr.link_standby = dev_priv->vbt.psr.full_link; | |
1220 | ||
5422b37c | 1221 | INIT_WORK(&dev_priv->psr.work, intel_psr_work); |
0bc12bcb RV |
1222 | mutex_init(&dev_priv->psr.lock); |
1223 | } | |
cc3054ff JRS |
1224 | |
1225 | void intel_psr_short_pulse(struct intel_dp *intel_dp) | |
1226 | { | |
1895759e | 1227 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); |
cc3054ff JRS |
1228 | struct i915_psr *psr = &dev_priv->psr; |
1229 | u8 val; | |
93bf76ed | 1230 | const u8 errors = DP_PSR_RFB_STORAGE_ERROR | |
00c8f194 JRS |
1231 | DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR | |
1232 | DP_PSR_LINK_CRC_ERROR; | |
cc3054ff JRS |
1233 | |
1234 | if (!CAN_PSR(dev_priv) || !intel_dp_is_edp(intel_dp)) | |
1235 | return; | |
1236 | ||
1237 | mutex_lock(&psr->lock); | |
1238 | ||
c44301fc | 1239 | if (!psr->enabled || psr->dp != intel_dp) |
cc3054ff JRS |
1240 | goto exit; |
1241 | ||
1242 | if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_STATUS, &val) != 1) { | |
1243 | DRM_ERROR("PSR_STATUS dpcd read failed\n"); | |
1244 | goto exit; | |
1245 | } | |
1246 | ||
1247 | if ((val & DP_PSR_SINK_STATE_MASK) == DP_PSR_SINK_INTERNAL_ERROR) { | |
1248 | DRM_DEBUG_KMS("PSR sink internal error, disabling PSR\n"); | |
1249 | intel_psr_disable_locked(intel_dp); | |
50a12d8f | 1250 | psr->sink_not_reliable = true; |
cc3054ff JRS |
1251 | } |
1252 | ||
93bf76ed JRS |
1253 | if (drm_dp_dpcd_readb(&intel_dp->aux, DP_PSR_ERROR_STATUS, &val) != 1) { |
1254 | DRM_ERROR("PSR_ERROR_STATUS dpcd read failed\n"); | |
1255 | goto exit; | |
1256 | } | |
1257 | ||
1258 | if (val & DP_PSR_RFB_STORAGE_ERROR) | |
1259 | DRM_DEBUG_KMS("PSR RFB storage error, disabling PSR\n"); | |
1260 | if (val & DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR) | |
1261 | DRM_DEBUG_KMS("PSR VSC SDP uncorrectable error, disabling PSR\n"); | |
00c8f194 JRS |
1262 | if (val & DP_PSR_LINK_CRC_ERROR) |
1263 | DRM_ERROR("PSR Link CRC error, disabling PSR\n"); | |
93bf76ed JRS |
1264 | |
1265 | if (val & ~errors) | |
1266 | DRM_ERROR("PSR_ERROR_STATUS unhandled errors %x\n", | |
1267 | val & ~errors); | |
50a12d8f | 1268 | if (val & errors) { |
93bf76ed | 1269 | intel_psr_disable_locked(intel_dp); |
50a12d8f JRS |
1270 | psr->sink_not_reliable = true; |
1271 | } | |
93bf76ed JRS |
1272 | /* clear status register */ |
1273 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_ERROR_STATUS, val); | |
cc3054ff JRS |
1274 | exit: |
1275 | mutex_unlock(&psr->lock); | |
1276 | } | |
2f8e7ea9 JRS |
1277 | |
1278 | bool intel_psr_enabled(struct intel_dp *intel_dp) | |
1279 | { | |
1280 | struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); | |
1281 | bool ret; | |
1282 | ||
1283 | if (!CAN_PSR(dev_priv) || !intel_dp_is_edp(intel_dp)) | |
1284 | return false; | |
1285 | ||
1286 | mutex_lock(&dev_priv->psr.lock); | |
1287 | ret = (dev_priv->psr.dp == intel_dp && dev_priv->psr.enabled); | |
1288 | mutex_unlock(&dev_priv->psr.lock); | |
1289 | ||
1290 | return ret; | |
1291 | } |