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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 | ||
0bc12bcb RV |
54 | #include <drm/drmP.h> |
55 | ||
56 | #include "intel_drv.h" | |
57 | #include "i915_drv.h" | |
58 | ||
59 | static bool is_edp_psr(struct intel_dp *intel_dp) | |
60 | { | |
61 | return intel_dp->psr_dpcd[0] & DP_PSR_IS_SUPPORTED; | |
62 | } | |
63 | ||
e2bbc343 RV |
64 | static bool vlv_is_psr_active_on_pipe(struct drm_device *dev, int pipe) |
65 | { | |
66 | struct drm_i915_private *dev_priv = dev->dev_private; | |
67 | uint32_t val; | |
68 | ||
69 | val = I915_READ(VLV_PSRSTAT(pipe)) & | |
70 | VLV_EDP_PSR_CURR_STATE_MASK; | |
71 | return (val == VLV_EDP_PSR_ACTIVE_NORFB_UP) || | |
72 | (val == VLV_EDP_PSR_ACTIVE_SF_UPDATE); | |
73 | } | |
74 | ||
0bc12bcb RV |
75 | static void intel_psr_write_vsc(struct intel_dp *intel_dp, |
76 | struct edp_vsc_psr *vsc_psr) | |
77 | { | |
78 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
79 | struct drm_device *dev = dig_port->base.base.dev; | |
80 | struct drm_i915_private *dev_priv = dev->dev_private; | |
81 | struct intel_crtc *crtc = to_intel_crtc(dig_port->base.base.crtc); | |
6e3c9717 ACO |
82 | u32 ctl_reg = HSW_TVIDEO_DIP_CTL(crtc->config->cpu_transcoder); |
83 | u32 data_reg = HSW_TVIDEO_DIP_VSC_DATA(crtc->config->cpu_transcoder); | |
0bc12bcb RV |
84 | uint32_t *data = (uint32_t *) vsc_psr; |
85 | unsigned int i; | |
86 | ||
87 | /* As per BSPec (Pipe Video Data Island Packet), we need to disable | |
88 | the video DIP being updated before program video DIP data buffer | |
89 | registers for DIP being updated. */ | |
90 | I915_WRITE(ctl_reg, 0); | |
91 | POSTING_READ(ctl_reg); | |
92 | ||
93 | for (i = 0; i < VIDEO_DIP_VSC_DATA_SIZE; i += 4) { | |
94 | if (i < sizeof(struct edp_vsc_psr)) | |
95 | I915_WRITE(data_reg + i, *data++); | |
96 | else | |
97 | I915_WRITE(data_reg + i, 0); | |
98 | } | |
99 | ||
100 | I915_WRITE(ctl_reg, VIDEO_DIP_ENABLE_VSC_HSW); | |
101 | POSTING_READ(ctl_reg); | |
102 | } | |
103 | ||
e2bbc343 RV |
104 | static void vlv_psr_setup_vsc(struct intel_dp *intel_dp) |
105 | { | |
106 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
107 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
108 | struct drm_i915_private *dev_priv = dev->dev_private; | |
109 | struct drm_crtc *crtc = intel_dig_port->base.base.crtc; | |
110 | enum pipe pipe = to_intel_crtc(crtc)->pipe; | |
111 | uint32_t val; | |
112 | ||
113 | /* VLV auto-generate VSC package as per EDP 1.3 spec, Table 3.10 */ | |
114 | val = I915_READ(VLV_VSCSDP(pipe)); | |
115 | val &= ~VLV_EDP_PSR_SDP_FREQ_MASK; | |
116 | val |= VLV_EDP_PSR_SDP_FREQ_EVFRAME; | |
117 | I915_WRITE(VLV_VSCSDP(pipe), val); | |
118 | } | |
119 | ||
474d1ec4 SJ |
120 | static void skl_psr_setup_su_vsc(struct intel_dp *intel_dp) |
121 | { | |
122 | struct edp_vsc_psr psr_vsc; | |
123 | ||
124 | /* Prepare VSC Header for SU as per EDP 1.4 spec, Table 6.11 */ | |
125 | memset(&psr_vsc, 0, sizeof(psr_vsc)); | |
126 | psr_vsc.sdp_header.HB0 = 0; | |
127 | psr_vsc.sdp_header.HB1 = 0x7; | |
128 | psr_vsc.sdp_header.HB2 = 0x3; | |
129 | psr_vsc.sdp_header.HB3 = 0xb; | |
130 | intel_psr_write_vsc(intel_dp, &psr_vsc); | |
131 | } | |
132 | ||
e2bbc343 | 133 | static void hsw_psr_setup_vsc(struct intel_dp *intel_dp) |
0bc12bcb RV |
134 | { |
135 | struct edp_vsc_psr psr_vsc; | |
136 | ||
137 | /* Prepare VSC packet as per EDP 1.3 spec, Table 3.10 */ | |
138 | memset(&psr_vsc, 0, sizeof(psr_vsc)); | |
139 | psr_vsc.sdp_header.HB0 = 0; | |
140 | psr_vsc.sdp_header.HB1 = 0x7; | |
141 | psr_vsc.sdp_header.HB2 = 0x2; | |
142 | psr_vsc.sdp_header.HB3 = 0x8; | |
143 | intel_psr_write_vsc(intel_dp, &psr_vsc); | |
144 | } | |
145 | ||
e2bbc343 RV |
146 | static void vlv_psr_enable_sink(struct intel_dp *intel_dp) |
147 | { | |
148 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, | |
670b90d2 | 149 | DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE); |
e2bbc343 RV |
150 | } |
151 | ||
152 | static void hsw_psr_enable_sink(struct intel_dp *intel_dp) | |
0bc12bcb RV |
153 | { |
154 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
155 | struct drm_device *dev = dig_port->base.base.dev; | |
156 | struct drm_i915_private *dev_priv = dev->dev_private; | |
157 | uint32_t aux_clock_divider; | |
e3d99845 | 158 | uint32_t aux_data_reg, aux_ctl_reg; |
0bc12bcb | 159 | int precharge = 0x3; |
0bc12bcb RV |
160 | static const uint8_t aux_msg[] = { |
161 | [0] = DP_AUX_NATIVE_WRITE << 4, | |
162 | [1] = DP_SET_POWER >> 8, | |
163 | [2] = DP_SET_POWER & 0xff, | |
164 | [3] = 1 - 1, | |
165 | [4] = DP_SET_POWER_D0, | |
166 | }; | |
167 | int i; | |
168 | ||
169 | BUILD_BUG_ON(sizeof(aux_msg) > 20); | |
170 | ||
171 | aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, 0); | |
172 | ||
89251b17 RV |
173 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, |
174 | DP_PSR_ENABLE & ~DP_PSR_MAIN_LINK_ACTIVE); | |
0bc12bcb | 175 | |
474d1ec4 SJ |
176 | /* Enable AUX frame sync at sink */ |
177 | if (dev_priv->psr.aux_frame_sync) | |
178 | drm_dp_dpcd_writeb(&intel_dp->aux, | |
179 | DP_SINK_DEVICE_AUX_FRAME_SYNC_CONF, | |
180 | DP_AUX_FRAME_SYNC_ENABLE); | |
181 | ||
e3d99845 SJ |
182 | aux_data_reg = (INTEL_INFO(dev)->gen >= 9) ? |
183 | DPA_AUX_CH_DATA1 : EDP_PSR_AUX_DATA1(dev); | |
184 | aux_ctl_reg = (INTEL_INFO(dev)->gen >= 9) ? | |
185 | DPA_AUX_CH_CTL : EDP_PSR_AUX_CTL(dev); | |
186 | ||
0bc12bcb RV |
187 | /* Setup AUX registers */ |
188 | for (i = 0; i < sizeof(aux_msg); i += 4) | |
e3d99845 | 189 | I915_WRITE(aux_data_reg + i, |
0bc12bcb RV |
190 | intel_dp_pack_aux(&aux_msg[i], sizeof(aux_msg) - i)); |
191 | ||
e3d99845 SJ |
192 | if (INTEL_INFO(dev)->gen >= 9) { |
193 | uint32_t val; | |
194 | ||
195 | val = I915_READ(aux_ctl_reg); | |
196 | val &= ~DP_AUX_CH_CTL_TIME_OUT_MASK; | |
197 | val |= DP_AUX_CH_CTL_TIME_OUT_1600us; | |
198 | val &= ~DP_AUX_CH_CTL_MESSAGE_SIZE_MASK; | |
199 | val |= (sizeof(aux_msg) << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
474d1ec4 | 200 | /* Use hardcoded data values for PSR, frame sync and GTC */ |
e3d99845 | 201 | val &= ~DP_AUX_CH_CTL_PSR_DATA_AUX_REG_SKL; |
474d1ec4 SJ |
202 | val &= ~DP_AUX_CH_CTL_FS_DATA_AUX_REG_SKL; |
203 | val &= ~DP_AUX_CH_CTL_GTC_DATA_AUX_REG_SKL; | |
e3d99845 SJ |
204 | I915_WRITE(aux_ctl_reg, val); |
205 | } else { | |
206 | I915_WRITE(aux_ctl_reg, | |
0bc12bcb RV |
207 | DP_AUX_CH_CTL_TIME_OUT_400us | |
208 | (sizeof(aux_msg) << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
209 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
210 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT)); | |
e3d99845 | 211 | } |
89251b17 RV |
212 | |
213 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, DP_PSR_ENABLE); | |
0bc12bcb RV |
214 | } |
215 | ||
e2bbc343 RV |
216 | static void vlv_psr_enable_source(struct intel_dp *intel_dp) |
217 | { | |
218 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
219 | struct drm_device *dev = dig_port->base.base.dev; | |
220 | struct drm_i915_private *dev_priv = dev->dev_private; | |
221 | struct drm_crtc *crtc = dig_port->base.base.crtc; | |
222 | enum pipe pipe = to_intel_crtc(crtc)->pipe; | |
223 | ||
224 | /* Transition from PSR_state 0 to PSR_state 1, i.e. PSR Inactive */ | |
225 | I915_WRITE(VLV_PSRCTL(pipe), | |
226 | VLV_EDP_PSR_MODE_SW_TIMER | | |
227 | VLV_EDP_PSR_SRC_TRANSMITTER_STATE | | |
228 | VLV_EDP_PSR_ENABLE); | |
229 | } | |
230 | ||
995d3047 RV |
231 | static void vlv_psr_activate(struct intel_dp *intel_dp) |
232 | { | |
233 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
234 | struct drm_device *dev = dig_port->base.base.dev; | |
235 | struct drm_i915_private *dev_priv = dev->dev_private; | |
236 | struct drm_crtc *crtc = dig_port->base.base.crtc; | |
237 | enum pipe pipe = to_intel_crtc(crtc)->pipe; | |
238 | ||
239 | /* Let's do the transition from PSR_state 1 to PSR_state 2 | |
240 | * that is PSR transition to active - static frame transmission. | |
241 | * Then Hardware is responsible for the transition to PSR_state 3 | |
242 | * that is PSR active - no Remote Frame Buffer (RFB) update. | |
243 | */ | |
244 | I915_WRITE(VLV_PSRCTL(pipe), I915_READ(VLV_PSRCTL(pipe)) | | |
245 | VLV_EDP_PSR_ACTIVE_ENTRY); | |
246 | } | |
247 | ||
e2bbc343 | 248 | static void hsw_psr_enable_source(struct intel_dp *intel_dp) |
0bc12bcb RV |
249 | { |
250 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
251 | struct drm_device *dev = dig_port->base.base.dev; | |
252 | struct drm_i915_private *dev_priv = dev->dev_private; | |
474d1ec4 | 253 | |
0bc12bcb | 254 | uint32_t max_sleep_time = 0x1f; |
d44b4dcb RV |
255 | /* Lately it was identified that depending on panel idle frame count |
256 | * calculated at HW can be off by 1. So let's use what came | |
257 | * from VBT + 1 and at minimum 2 to be on the safe side. | |
258 | */ | |
259 | uint32_t idle_frames = dev_priv->vbt.psr.idle_frames ? | |
260 | dev_priv->vbt.psr.idle_frames + 1 : 2; | |
0bc12bcb RV |
261 | uint32_t val = 0x0; |
262 | const uint32_t link_entry_time = EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES; | |
0bc12bcb | 263 | |
3301d409 RV |
264 | if (intel_dp->psr_dpcd[1] & DP_PSR_NO_TRAIN_ON_EXIT) { |
265 | /* It doesn't mean we shouldn't send TPS patters, so let's | |
266 | send the minimal TP1 possible and skip TP2. */ | |
267 | val |= EDP_PSR_TP1_TIME_100us; | |
0bc12bcb | 268 | val |= EDP_PSR_TP2_TP3_TIME_0us; |
0bc12bcb | 269 | val |= EDP_PSR_SKIP_AUX_EXIT; |
3301d409 RV |
270 | /* Sink should be able to train with the 5 or 6 idle patterns */ |
271 | idle_frames += 4; | |
cff5190c | 272 | } |
0bc12bcb RV |
273 | |
274 | I915_WRITE(EDP_PSR_CTL(dev), val | | |
275 | (IS_BROADWELL(dev) ? 0 : link_entry_time) | | |
276 | max_sleep_time << EDP_PSR_MAX_SLEEP_TIME_SHIFT | | |
277 | idle_frames << EDP_PSR_IDLE_FRAME_SHIFT | | |
278 | EDP_PSR_ENABLE); | |
474d1ec4 SJ |
279 | |
280 | if (dev_priv->psr.psr2_support) | |
281 | I915_WRITE(EDP_PSR2_CTL, EDP_PSR2_ENABLE | | |
282 | EDP_SU_TRACK_ENABLE | EDP_PSR2_TP2_TIME_100); | |
0bc12bcb RV |
283 | } |
284 | ||
285 | static bool intel_psr_match_conditions(struct intel_dp *intel_dp) | |
286 | { | |
287 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
288 | struct drm_device *dev = dig_port->base.base.dev; | |
289 | struct drm_i915_private *dev_priv = dev->dev_private; | |
290 | struct drm_crtc *crtc = dig_port->base.base.crtc; | |
291 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
292 | ||
293 | lockdep_assert_held(&dev_priv->psr.lock); | |
294 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); | |
295 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); | |
296 | ||
297 | dev_priv->psr.source_ok = false; | |
298 | ||
299 | if (IS_HASWELL(dev) && dig_port->port != PORT_A) { | |
300 | DRM_DEBUG_KMS("HSW ties PSR to DDI A (eDP)\n"); | |
301 | return false; | |
302 | } | |
303 | ||
304 | if (!i915.enable_psr) { | |
305 | DRM_DEBUG_KMS("PSR disable by flag\n"); | |
306 | return false; | |
307 | } | |
308 | ||
c8e68b7e | 309 | if (IS_HASWELL(dev) && |
6e3c9717 | 310 | I915_READ(HSW_STEREO_3D_CTL(intel_crtc->config->cpu_transcoder)) & |
c8e68b7e | 311 | S3D_ENABLE) { |
0bc12bcb RV |
312 | DRM_DEBUG_KMS("PSR condition failed: Stereo 3D is Enabled\n"); |
313 | return false; | |
314 | } | |
315 | ||
c8e68b7e | 316 | if (IS_HASWELL(dev) && |
6e3c9717 | 317 | intel_crtc->config->base.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) { |
0bc12bcb RV |
318 | DRM_DEBUG_KMS("PSR condition failed: Interlaced is Enabled\n"); |
319 | return false; | |
320 | } | |
321 | ||
89251b17 RV |
322 | if (!IS_VALLEYVIEW(dev) && ((dev_priv->vbt.psr.full_link) || |
323 | (dig_port->port != PORT_A))) { | |
324 | DRM_DEBUG_KMS("PSR condition failed: Link Standby requested/needed but not supported on this platform\n"); | |
325 | return false; | |
326 | } | |
327 | ||
0bc12bcb RV |
328 | dev_priv->psr.source_ok = true; |
329 | return true; | |
330 | } | |
331 | ||
e2bbc343 | 332 | static void intel_psr_activate(struct intel_dp *intel_dp) |
0bc12bcb RV |
333 | { |
334 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
335 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
336 | struct drm_i915_private *dev_priv = dev->dev_private; | |
337 | ||
338 | WARN_ON(I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE); | |
339 | WARN_ON(dev_priv->psr.active); | |
340 | lockdep_assert_held(&dev_priv->psr.lock); | |
341 | ||
995d3047 RV |
342 | /* Enable/Re-enable PSR on the host */ |
343 | if (HAS_DDI(dev)) | |
344 | /* On HSW+ after we enable PSR on source it will activate it | |
345 | * as soon as it match configure idle_frame count. So | |
346 | * we just actually enable it here on activation time. | |
347 | */ | |
348 | hsw_psr_enable_source(intel_dp); | |
349 | else | |
350 | vlv_psr_activate(intel_dp); | |
351 | ||
0bc12bcb RV |
352 | dev_priv->psr.active = true; |
353 | } | |
354 | ||
b2b89f55 RV |
355 | /** |
356 | * intel_psr_enable - Enable PSR | |
357 | * @intel_dp: Intel DP | |
358 | * | |
359 | * This function can only be called after the pipe is fully trained and enabled. | |
360 | */ | |
0bc12bcb RV |
361 | void intel_psr_enable(struct intel_dp *intel_dp) |
362 | { | |
363 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
364 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
365 | struct drm_i915_private *dev_priv = dev->dev_private; | |
474d1ec4 | 366 | struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc); |
0bc12bcb RV |
367 | |
368 | if (!HAS_PSR(dev)) { | |
369 | DRM_DEBUG_KMS("PSR not supported on this platform\n"); | |
370 | return; | |
371 | } | |
372 | ||
373 | if (!is_edp_psr(intel_dp)) { | |
374 | DRM_DEBUG_KMS("PSR not supported by this panel\n"); | |
375 | return; | |
376 | } | |
377 | ||
378 | mutex_lock(&dev_priv->psr.lock); | |
379 | if (dev_priv->psr.enabled) { | |
380 | DRM_DEBUG_KMS("PSR already in use\n"); | |
381 | goto unlock; | |
382 | } | |
383 | ||
384 | if (!intel_psr_match_conditions(intel_dp)) | |
385 | goto unlock; | |
386 | ||
387 | dev_priv->psr.busy_frontbuffer_bits = 0; | |
388 | ||
e2bbc343 RV |
389 | if (HAS_DDI(dev)) { |
390 | hsw_psr_setup_vsc(intel_dp); | |
0bc12bcb | 391 | |
474d1ec4 SJ |
392 | if (dev_priv->psr.psr2_support) { |
393 | /* PSR2 is restricted to work with panel resolutions upto 3200x2000 */ | |
394 | if (crtc->config->pipe_src_w > 3200 || | |
395 | crtc->config->pipe_src_h > 2000) | |
396 | dev_priv->psr.psr2_support = false; | |
397 | else | |
398 | skl_psr_setup_su_vsc(intel_dp); | |
399 | } | |
400 | ||
e2bbc343 RV |
401 | /* Avoid continuous PSR exit by masking memup and hpd */ |
402 | I915_WRITE(EDP_PSR_DEBUG_CTL(dev), EDP_PSR_DEBUG_MASK_MEMUP | | |
403 | EDP_PSR_DEBUG_MASK_HPD | EDP_PSR_DEBUG_MASK_LPSP); | |
0bc12bcb | 404 | |
e2bbc343 RV |
405 | /* Enable PSR on the panel */ |
406 | hsw_psr_enable_sink(intel_dp); | |
e3d99845 SJ |
407 | |
408 | if (INTEL_INFO(dev)->gen >= 9) | |
409 | intel_psr_activate(intel_dp); | |
e2bbc343 RV |
410 | } else { |
411 | vlv_psr_setup_vsc(intel_dp); | |
412 | ||
413 | /* Enable PSR on the panel */ | |
414 | vlv_psr_enable_sink(intel_dp); | |
415 | ||
416 | /* On HSW+ enable_source also means go to PSR entry/active | |
417 | * state as soon as idle_frame achieved and here would be | |
418 | * to soon. However on VLV enable_source just enable PSR | |
419 | * but let it on inactive state. So we might do this prior | |
420 | * to active transition, i.e. here. | |
421 | */ | |
422 | vlv_psr_enable_source(intel_dp); | |
423 | } | |
0bc12bcb RV |
424 | |
425 | dev_priv->psr.enabled = intel_dp; | |
426 | unlock: | |
427 | mutex_unlock(&dev_priv->psr.lock); | |
428 | } | |
429 | ||
e2bbc343 | 430 | static void vlv_psr_disable(struct intel_dp *intel_dp) |
0bc12bcb RV |
431 | { |
432 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
433 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
434 | struct drm_i915_private *dev_priv = dev->dev_private; | |
e2bbc343 RV |
435 | struct intel_crtc *intel_crtc = |
436 | to_intel_crtc(intel_dig_port->base.base.crtc); | |
437 | uint32_t val; | |
0bc12bcb | 438 | |
e2bbc343 RV |
439 | if (dev_priv->psr.active) { |
440 | /* Put VLV PSR back to PSR_state 0 that is PSR Disabled. */ | |
441 | if (wait_for((I915_READ(VLV_PSRSTAT(intel_crtc->pipe)) & | |
442 | VLV_EDP_PSR_IN_TRANS) == 0, 1)) | |
443 | WARN(1, "PSR transition took longer than expected\n"); | |
444 | ||
445 | val = I915_READ(VLV_PSRCTL(intel_crtc->pipe)); | |
446 | val &= ~VLV_EDP_PSR_ACTIVE_ENTRY; | |
447 | val &= ~VLV_EDP_PSR_ENABLE; | |
448 | val &= ~VLV_EDP_PSR_MODE_MASK; | |
449 | I915_WRITE(VLV_PSRCTL(intel_crtc->pipe), val); | |
450 | ||
451 | dev_priv->psr.active = false; | |
452 | } else { | |
453 | WARN_ON(vlv_is_psr_active_on_pipe(dev, intel_crtc->pipe)); | |
0bc12bcb | 454 | } |
e2bbc343 RV |
455 | } |
456 | ||
457 | static void hsw_psr_disable(struct intel_dp *intel_dp) | |
458 | { | |
459 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
460 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
461 | struct drm_i915_private *dev_priv = dev->dev_private; | |
0bc12bcb RV |
462 | |
463 | if (dev_priv->psr.active) { | |
464 | I915_WRITE(EDP_PSR_CTL(dev), | |
465 | I915_READ(EDP_PSR_CTL(dev)) & ~EDP_PSR_ENABLE); | |
466 | ||
467 | /* Wait till PSR is idle */ | |
468 | if (_wait_for((I915_READ(EDP_PSR_STATUS_CTL(dev)) & | |
469 | EDP_PSR_STATUS_STATE_MASK) == 0, 2000, 10)) | |
470 | DRM_ERROR("Timed out waiting for PSR Idle State\n"); | |
471 | ||
472 | dev_priv->psr.active = false; | |
473 | } else { | |
474 | WARN_ON(I915_READ(EDP_PSR_CTL(dev)) & EDP_PSR_ENABLE); | |
475 | } | |
e2bbc343 RV |
476 | } |
477 | ||
478 | /** | |
479 | * intel_psr_disable - Disable PSR | |
480 | * @intel_dp: Intel DP | |
481 | * | |
482 | * This function needs to be called before disabling pipe. | |
483 | */ | |
484 | void intel_psr_disable(struct intel_dp *intel_dp) | |
485 | { | |
486 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
487 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
488 | struct drm_i915_private *dev_priv = dev->dev_private; | |
489 | ||
490 | mutex_lock(&dev_priv->psr.lock); | |
491 | if (!dev_priv->psr.enabled) { | |
492 | mutex_unlock(&dev_priv->psr.lock); | |
493 | return; | |
494 | } | |
495 | ||
496 | if (HAS_DDI(dev)) | |
497 | hsw_psr_disable(intel_dp); | |
498 | else | |
499 | vlv_psr_disable(intel_dp); | |
0bc12bcb RV |
500 | |
501 | dev_priv->psr.enabled = NULL; | |
502 | mutex_unlock(&dev_priv->psr.lock); | |
503 | ||
504 | cancel_delayed_work_sync(&dev_priv->psr.work); | |
505 | } | |
506 | ||
507 | static void intel_psr_work(struct work_struct *work) | |
508 | { | |
509 | struct drm_i915_private *dev_priv = | |
510 | container_of(work, typeof(*dev_priv), psr.work.work); | |
511 | struct intel_dp *intel_dp = dev_priv->psr.enabled; | |
995d3047 RV |
512 | struct drm_crtc *crtc = dp_to_dig_port(intel_dp)->base.base.crtc; |
513 | enum pipe pipe = to_intel_crtc(crtc)->pipe; | |
0bc12bcb RV |
514 | |
515 | /* We have to make sure PSR is ready for re-enable | |
516 | * otherwise it keeps disabled until next full enable/disable cycle. | |
517 | * PSR might take some time to get fully disabled | |
518 | * and be ready for re-enable. | |
519 | */ | |
995d3047 RV |
520 | if (HAS_DDI(dev_priv->dev)) { |
521 | if (wait_for((I915_READ(EDP_PSR_STATUS_CTL(dev_priv->dev)) & | |
522 | EDP_PSR_STATUS_STATE_MASK) == 0, 50)) { | |
523 | DRM_ERROR("Timed out waiting for PSR Idle for re-enable\n"); | |
524 | return; | |
525 | } | |
526 | } else { | |
527 | if (wait_for((I915_READ(VLV_PSRSTAT(pipe)) & | |
528 | VLV_EDP_PSR_IN_TRANS) == 0, 1)) { | |
529 | DRM_ERROR("Timed out waiting for PSR Idle for re-enable\n"); | |
530 | return; | |
531 | } | |
0bc12bcb | 532 | } |
0bc12bcb RV |
533 | mutex_lock(&dev_priv->psr.lock); |
534 | intel_dp = dev_priv->psr.enabled; | |
535 | ||
536 | if (!intel_dp) | |
537 | goto unlock; | |
538 | ||
539 | /* | |
540 | * The delayed work can race with an invalidate hence we need to | |
541 | * recheck. Since psr_flush first clears this and then reschedules we | |
542 | * won't ever miss a flush when bailing out here. | |
543 | */ | |
544 | if (dev_priv->psr.busy_frontbuffer_bits) | |
545 | goto unlock; | |
546 | ||
e2bbc343 | 547 | intel_psr_activate(intel_dp); |
0bc12bcb RV |
548 | unlock: |
549 | mutex_unlock(&dev_priv->psr.lock); | |
550 | } | |
551 | ||
552 | static void intel_psr_exit(struct drm_device *dev) | |
553 | { | |
554 | struct drm_i915_private *dev_priv = dev->dev_private; | |
995d3047 RV |
555 | struct intel_dp *intel_dp = dev_priv->psr.enabled; |
556 | struct drm_crtc *crtc = dp_to_dig_port(intel_dp)->base.base.crtc; | |
557 | enum pipe pipe = to_intel_crtc(crtc)->pipe; | |
558 | u32 val; | |
0bc12bcb | 559 | |
995d3047 RV |
560 | if (!dev_priv->psr.active) |
561 | return; | |
562 | ||
563 | if (HAS_DDI(dev)) { | |
564 | val = I915_READ(EDP_PSR_CTL(dev)); | |
0bc12bcb RV |
565 | |
566 | WARN_ON(!(val & EDP_PSR_ENABLE)); | |
567 | ||
568 | I915_WRITE(EDP_PSR_CTL(dev), val & ~EDP_PSR_ENABLE); | |
995d3047 RV |
569 | } else { |
570 | val = I915_READ(VLV_PSRCTL(pipe)); | |
571 | ||
572 | /* Here we do the transition from PSR_state 3 to PSR_state 5 | |
573 | * directly once PSR State 4 that is active with single frame | |
574 | * update can be skipped. PSR_state 5 that is PSR exit then | |
575 | * Hardware is responsible to transition back to PSR_state 1 | |
576 | * that is PSR inactive. Same state after | |
577 | * vlv_edp_psr_enable_source. | |
578 | */ | |
579 | val &= ~VLV_EDP_PSR_ACTIVE_ENTRY; | |
580 | I915_WRITE(VLV_PSRCTL(pipe), val); | |
581 | ||
582 | /* Send AUX wake up - Spec says after transitioning to PSR | |
583 | * active we have to send AUX wake up by writing 01h in DPCD | |
584 | * 600h of sink device. | |
585 | * XXX: This might slow down the transition, but without this | |
586 | * HW doesn't complete the transition to PSR_state 1 and we | |
587 | * never get the screen updated. | |
588 | */ | |
589 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, | |
590 | DP_SET_POWER_D0); | |
0bc12bcb RV |
591 | } |
592 | ||
995d3047 | 593 | dev_priv->psr.active = false; |
0bc12bcb RV |
594 | } |
595 | ||
c7240c3b RV |
596 | /** |
597 | * intel_psr_single_frame_update - Single Frame Update | |
598 | * @dev: DRM device | |
599 | * | |
600 | * Some platforms support a single frame update feature that is used to | |
601 | * send and update only one frame on Remote Frame Buffer. | |
602 | * So far it is only implemented for Valleyview and Cherryview because | |
603 | * hardware requires this to be done before a page flip. | |
604 | */ | |
605 | void intel_psr_single_frame_update(struct drm_device *dev) | |
606 | { | |
607 | struct drm_i915_private *dev_priv = dev->dev_private; | |
608 | struct drm_crtc *crtc; | |
609 | enum pipe pipe; | |
610 | u32 val; | |
611 | ||
612 | /* | |
613 | * Single frame update is already supported on BDW+ but it requires | |
614 | * many W/A and it isn't really needed. | |
615 | */ | |
616 | if (!IS_VALLEYVIEW(dev)) | |
617 | return; | |
618 | ||
619 | mutex_lock(&dev_priv->psr.lock); | |
620 | if (!dev_priv->psr.enabled) { | |
621 | mutex_unlock(&dev_priv->psr.lock); | |
622 | return; | |
623 | } | |
624 | ||
625 | crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; | |
626 | pipe = to_intel_crtc(crtc)->pipe; | |
627 | val = I915_READ(VLV_PSRCTL(pipe)); | |
628 | ||
629 | /* | |
630 | * We need to set this bit before writing registers for a flip. | |
631 | * This bit will be self-clear when it gets to the PSR active state. | |
632 | */ | |
633 | I915_WRITE(VLV_PSRCTL(pipe), val | VLV_EDP_PSR_SINGLE_FRAME_UPDATE); | |
634 | ||
635 | mutex_unlock(&dev_priv->psr.lock); | |
636 | } | |
637 | ||
b2b89f55 RV |
638 | /** |
639 | * intel_psr_invalidate - Invalidade PSR | |
640 | * @dev: DRM device | |
641 | * @frontbuffer_bits: frontbuffer plane tracking bits | |
642 | * | |
643 | * Since the hardware frontbuffer tracking has gaps we need to integrate | |
644 | * with the software frontbuffer tracking. This function gets called every | |
645 | * time frontbuffer rendering starts and a buffer gets dirtied. PSR must be | |
646 | * disabled if the frontbuffer mask contains a buffer relevant to PSR. | |
647 | * | |
648 | * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits." | |
649 | */ | |
0bc12bcb RV |
650 | void intel_psr_invalidate(struct drm_device *dev, |
651 | unsigned frontbuffer_bits) | |
652 | { | |
653 | struct drm_i915_private *dev_priv = dev->dev_private; | |
654 | struct drm_crtc *crtc; | |
655 | enum pipe pipe; | |
656 | ||
657 | mutex_lock(&dev_priv->psr.lock); | |
658 | if (!dev_priv->psr.enabled) { | |
659 | mutex_unlock(&dev_priv->psr.lock); | |
660 | return; | |
661 | } | |
662 | ||
663 | crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; | |
664 | pipe = to_intel_crtc(crtc)->pipe; | |
665 | ||
666 | intel_psr_exit(dev); | |
667 | ||
668 | frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe); | |
669 | ||
670 | dev_priv->psr.busy_frontbuffer_bits |= frontbuffer_bits; | |
671 | mutex_unlock(&dev_priv->psr.lock); | |
672 | } | |
673 | ||
b2b89f55 RV |
674 | /** |
675 | * intel_psr_flush - Flush PSR | |
676 | * @dev: DRM device | |
677 | * @frontbuffer_bits: frontbuffer plane tracking bits | |
678 | * | |
679 | * Since the hardware frontbuffer tracking has gaps we need to integrate | |
680 | * with the software frontbuffer tracking. This function gets called every | |
681 | * time frontbuffer rendering has completed and flushed out to memory. PSR | |
682 | * can be enabled again if no other frontbuffer relevant to PSR is dirty. | |
683 | * | |
684 | * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits. | |
685 | */ | |
0bc12bcb RV |
686 | void intel_psr_flush(struct drm_device *dev, |
687 | unsigned frontbuffer_bits) | |
688 | { | |
689 | struct drm_i915_private *dev_priv = dev->dev_private; | |
690 | struct drm_crtc *crtc; | |
691 | enum pipe pipe; | |
692 | ||
693 | mutex_lock(&dev_priv->psr.lock); | |
694 | if (!dev_priv->psr.enabled) { | |
695 | mutex_unlock(&dev_priv->psr.lock); | |
696 | return; | |
697 | } | |
698 | ||
699 | crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; | |
700 | pipe = to_intel_crtc(crtc)->pipe; | |
701 | dev_priv->psr.busy_frontbuffer_bits &= ~frontbuffer_bits; | |
702 | ||
703 | /* | |
704 | * On Haswell sprite plane updates don't result in a psr invalidating | |
705 | * signal in the hardware. Which means we need to manually fake this in | |
706 | * software for all flushes, not just when we've seen a preceding | |
707 | * invalidation through frontbuffer rendering. | |
708 | */ | |
709 | if (IS_HASWELL(dev) && | |
710 | (frontbuffer_bits & INTEL_FRONTBUFFER_SPRITE(pipe))) | |
711 | intel_psr_exit(dev); | |
712 | ||
995d3047 RV |
713 | /* |
714 | * On Valleyview and Cherryview we don't use hardware tracking so | |
46c3fce6 | 715 | * any plane updates or cursor moves don't result in a PSR |
995d3047 RV |
716 | * invalidating. Which means we need to manually fake this in |
717 | * software for all flushes, not just when we've seen a preceding | |
718 | * invalidation through frontbuffer rendering. */ | |
46c3fce6 | 719 | if (!HAS_DDI(dev)) |
995d3047 RV |
720 | intel_psr_exit(dev); |
721 | ||
0bc12bcb RV |
722 | if (!dev_priv->psr.active && !dev_priv->psr.busy_frontbuffer_bits) |
723 | schedule_delayed_work(&dev_priv->psr.work, | |
724 | msecs_to_jiffies(100)); | |
725 | mutex_unlock(&dev_priv->psr.lock); | |
726 | } | |
727 | ||
b2b89f55 RV |
728 | /** |
729 | * intel_psr_init - Init basic PSR work and mutex. | |
730 | * @dev: DRM device | |
731 | * | |
732 | * This function is called only once at driver load to initialize basic | |
733 | * PSR stuff. | |
734 | */ | |
0bc12bcb RV |
735 | void intel_psr_init(struct drm_device *dev) |
736 | { | |
737 | struct drm_i915_private *dev_priv = dev->dev_private; | |
738 | ||
739 | INIT_DELAYED_WORK(&dev_priv->psr.work, intel_psr_work); | |
740 | mutex_init(&dev_priv->psr.lock); | |
741 | } |