Commit | Line | Data |
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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 | 75 | static void intel_psr_write_vsc(struct intel_dp *intel_dp, |
436c6d4a | 76 | const struct edp_vsc_psr *vsc_psr) |
0bc12bcb RV |
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); | |
436c6d4a | 82 | enum transcoder cpu_transcoder = crtc->config->cpu_transcoder; |
f0f59a00 | 83 | i915_reg_t ctl_reg = HSW_TVIDEO_DIP_CTL(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 | ||
436c6d4a VS |
93 | for (i = 0; i < sizeof(*vsc_psr); i += 4) { |
94 | I915_WRITE(HSW_TVIDEO_DIP_VSC_DATA(cpu_transcoder, | |
95 | i >> 2), *data); | |
96 | data++; | |
0bc12bcb | 97 | } |
436c6d4a VS |
98 | for (; i < VIDEO_DIP_VSC_DATA_SIZE; i += 4) |
99 | I915_WRITE(HSW_TVIDEO_DIP_VSC_DATA(cpu_transcoder, | |
100 | i >> 2), 0); | |
0bc12bcb RV |
101 | |
102 | I915_WRITE(ctl_reg, VIDEO_DIP_ENABLE_VSC_HSW); | |
103 | POSTING_READ(ctl_reg); | |
104 | } | |
105 | ||
e2bbc343 RV |
106 | static void vlv_psr_setup_vsc(struct intel_dp *intel_dp) |
107 | { | |
108 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
109 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
110 | struct drm_i915_private *dev_priv = dev->dev_private; | |
111 | struct drm_crtc *crtc = intel_dig_port->base.base.crtc; | |
112 | enum pipe pipe = to_intel_crtc(crtc)->pipe; | |
113 | uint32_t val; | |
114 | ||
115 | /* VLV auto-generate VSC package as per EDP 1.3 spec, Table 3.10 */ | |
116 | val = I915_READ(VLV_VSCSDP(pipe)); | |
117 | val &= ~VLV_EDP_PSR_SDP_FREQ_MASK; | |
118 | val |= VLV_EDP_PSR_SDP_FREQ_EVFRAME; | |
119 | I915_WRITE(VLV_VSCSDP(pipe), val); | |
120 | } | |
121 | ||
474d1ec4 SJ |
122 | static void skl_psr_setup_su_vsc(struct intel_dp *intel_dp) |
123 | { | |
124 | struct edp_vsc_psr psr_vsc; | |
125 | ||
126 | /* Prepare VSC Header for SU as per EDP 1.4 spec, Table 6.11 */ | |
127 | memset(&psr_vsc, 0, sizeof(psr_vsc)); | |
128 | psr_vsc.sdp_header.HB0 = 0; | |
129 | psr_vsc.sdp_header.HB1 = 0x7; | |
130 | psr_vsc.sdp_header.HB2 = 0x3; | |
131 | psr_vsc.sdp_header.HB3 = 0xb; | |
132 | intel_psr_write_vsc(intel_dp, &psr_vsc); | |
133 | } | |
134 | ||
e2bbc343 | 135 | static void hsw_psr_setup_vsc(struct intel_dp *intel_dp) |
0bc12bcb RV |
136 | { |
137 | struct edp_vsc_psr psr_vsc; | |
138 | ||
139 | /* Prepare VSC packet as per EDP 1.3 spec, Table 3.10 */ | |
140 | memset(&psr_vsc, 0, sizeof(psr_vsc)); | |
141 | psr_vsc.sdp_header.HB0 = 0; | |
142 | psr_vsc.sdp_header.HB1 = 0x7; | |
143 | psr_vsc.sdp_header.HB2 = 0x2; | |
144 | psr_vsc.sdp_header.HB3 = 0x8; | |
145 | intel_psr_write_vsc(intel_dp, &psr_vsc); | |
146 | } | |
147 | ||
e2bbc343 RV |
148 | static void vlv_psr_enable_sink(struct intel_dp *intel_dp) |
149 | { | |
150 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, | |
670b90d2 | 151 | DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE); |
e2bbc343 RV |
152 | } |
153 | ||
f0f59a00 VS |
154 | static i915_reg_t psr_aux_ctl_reg(struct drm_i915_private *dev_priv, |
155 | enum port port) | |
1f38089c VS |
156 | { |
157 | if (INTEL_INFO(dev_priv)->gen >= 9) | |
158 | return DP_AUX_CH_CTL(port); | |
159 | else | |
160 | return EDP_PSR_AUX_CTL; | |
161 | } | |
162 | ||
f0f59a00 VS |
163 | static i915_reg_t psr_aux_data_reg(struct drm_i915_private *dev_priv, |
164 | enum port port, int index) | |
1f38089c VS |
165 | { |
166 | if (INTEL_INFO(dev_priv)->gen >= 9) | |
167 | return DP_AUX_CH_DATA(port, index); | |
168 | else | |
169 | return EDP_PSR_AUX_DATA(index); | |
170 | } | |
171 | ||
e2bbc343 | 172 | static void hsw_psr_enable_sink(struct intel_dp *intel_dp) |
0bc12bcb RV |
173 | { |
174 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
175 | struct drm_device *dev = dig_port->base.base.dev; | |
176 | struct drm_i915_private *dev_priv = dev->dev_private; | |
177 | uint32_t aux_clock_divider; | |
f0f59a00 | 178 | i915_reg_t aux_ctl_reg; |
0bc12bcb | 179 | int precharge = 0x3; |
0bc12bcb RV |
180 | static const uint8_t aux_msg[] = { |
181 | [0] = DP_AUX_NATIVE_WRITE << 4, | |
182 | [1] = DP_SET_POWER >> 8, | |
183 | [2] = DP_SET_POWER & 0xff, | |
184 | [3] = 1 - 1, | |
185 | [4] = DP_SET_POWER_D0, | |
186 | }; | |
750a951f | 187 | enum port port = dig_port->port; |
0bc12bcb RV |
188 | int i; |
189 | ||
190 | BUILD_BUG_ON(sizeof(aux_msg) > 20); | |
191 | ||
192 | aux_clock_divider = intel_dp->get_aux_clock_divider(intel_dp, 0); | |
193 | ||
474d1ec4 SJ |
194 | /* Enable AUX frame sync at sink */ |
195 | if (dev_priv->psr.aux_frame_sync) | |
196 | drm_dp_dpcd_writeb(&intel_dp->aux, | |
197 | DP_SINK_DEVICE_AUX_FRAME_SYNC_CONF, | |
198 | DP_AUX_FRAME_SYNC_ENABLE); | |
199 | ||
1f38089c | 200 | aux_ctl_reg = psr_aux_ctl_reg(dev_priv, port); |
e3d99845 | 201 | |
0bc12bcb RV |
202 | /* Setup AUX registers */ |
203 | for (i = 0; i < sizeof(aux_msg); i += 4) | |
1f38089c | 204 | I915_WRITE(psr_aux_data_reg(dev_priv, port, i >> 2), |
0bc12bcb RV |
205 | intel_dp_pack_aux(&aux_msg[i], sizeof(aux_msg) - i)); |
206 | ||
e3d99845 SJ |
207 | if (INTEL_INFO(dev)->gen >= 9) { |
208 | uint32_t val; | |
209 | ||
210 | val = I915_READ(aux_ctl_reg); | |
211 | val &= ~DP_AUX_CH_CTL_TIME_OUT_MASK; | |
212 | val |= DP_AUX_CH_CTL_TIME_OUT_1600us; | |
213 | val &= ~DP_AUX_CH_CTL_MESSAGE_SIZE_MASK; | |
214 | val |= (sizeof(aux_msg) << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); | |
474d1ec4 | 215 | /* Use hardcoded data values for PSR, frame sync and GTC */ |
e3d99845 | 216 | val &= ~DP_AUX_CH_CTL_PSR_DATA_AUX_REG_SKL; |
474d1ec4 SJ |
217 | val &= ~DP_AUX_CH_CTL_FS_DATA_AUX_REG_SKL; |
218 | val &= ~DP_AUX_CH_CTL_GTC_DATA_AUX_REG_SKL; | |
e3d99845 SJ |
219 | I915_WRITE(aux_ctl_reg, val); |
220 | } else { | |
221 | I915_WRITE(aux_ctl_reg, | |
0bc12bcb RV |
222 | DP_AUX_CH_CTL_TIME_OUT_400us | |
223 | (sizeof(aux_msg) << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | | |
224 | (precharge << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | | |
225 | (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT)); | |
e3d99845 | 226 | } |
89251b17 RV |
227 | |
228 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, DP_PSR_ENABLE); | |
0bc12bcb RV |
229 | } |
230 | ||
e2bbc343 RV |
231 | static void vlv_psr_enable_source(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 | /* Transition from PSR_state 0 to PSR_state 1, i.e. PSR Inactive */ | |
240 | I915_WRITE(VLV_PSRCTL(pipe), | |
241 | VLV_EDP_PSR_MODE_SW_TIMER | | |
242 | VLV_EDP_PSR_SRC_TRANSMITTER_STATE | | |
243 | VLV_EDP_PSR_ENABLE); | |
244 | } | |
245 | ||
995d3047 RV |
246 | static void vlv_psr_activate(struct intel_dp *intel_dp) |
247 | { | |
248 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
249 | struct drm_device *dev = dig_port->base.base.dev; | |
250 | struct drm_i915_private *dev_priv = dev->dev_private; | |
251 | struct drm_crtc *crtc = dig_port->base.base.crtc; | |
252 | enum pipe pipe = to_intel_crtc(crtc)->pipe; | |
253 | ||
254 | /* Let's do the transition from PSR_state 1 to PSR_state 2 | |
255 | * that is PSR transition to active - static frame transmission. | |
256 | * Then Hardware is responsible for the transition to PSR_state 3 | |
257 | * that is PSR active - no Remote Frame Buffer (RFB) update. | |
258 | */ | |
259 | I915_WRITE(VLV_PSRCTL(pipe), I915_READ(VLV_PSRCTL(pipe)) | | |
260 | VLV_EDP_PSR_ACTIVE_ENTRY); | |
261 | } | |
262 | ||
e2bbc343 | 263 | static void hsw_psr_enable_source(struct intel_dp *intel_dp) |
0bc12bcb RV |
264 | { |
265 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
266 | struct drm_device *dev = dig_port->base.base.dev; | |
267 | struct drm_i915_private *dev_priv = dev->dev_private; | |
474d1ec4 | 268 | |
0bc12bcb | 269 | uint32_t max_sleep_time = 0x1f; |
dfaf37ba RV |
270 | /* |
271 | * Let's respect VBT in case VBT asks a higher idle_frame value. | |
272 | * Let's use 6 as the minimum to cover all known cases including | |
273 | * the off-by-one issue that HW has in some cases. Also there are | |
274 | * cases where sink should be able to train | |
275 | * with the 5 or 6 idle patterns. | |
d44b4dcb | 276 | */ |
dfaf37ba | 277 | uint32_t idle_frames = max(6, dev_priv->vbt.psr.idle_frames); |
0bc12bcb RV |
278 | uint32_t val = 0x0; |
279 | const uint32_t link_entry_time = EDP_PSR_MIN_LINK_ENTRY_TIME_8_LINES; | |
0bc12bcb | 280 | |
443a389f | 281 | I915_WRITE(EDP_PSR_CTL, val | |
0bc12bcb RV |
282 | (IS_BROADWELL(dev) ? 0 : link_entry_time) | |
283 | max_sleep_time << EDP_PSR_MAX_SLEEP_TIME_SHIFT | | |
284 | idle_frames << EDP_PSR_IDLE_FRAME_SHIFT | | |
285 | EDP_PSR_ENABLE); | |
474d1ec4 SJ |
286 | |
287 | if (dev_priv->psr.psr2_support) | |
288 | I915_WRITE(EDP_PSR2_CTL, EDP_PSR2_ENABLE | | |
289 | EDP_SU_TRACK_ENABLE | EDP_PSR2_TP2_TIME_100); | |
0bc12bcb RV |
290 | } |
291 | ||
292 | static bool intel_psr_match_conditions(struct intel_dp *intel_dp) | |
293 | { | |
294 | struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp); | |
295 | struct drm_device *dev = dig_port->base.base.dev; | |
296 | struct drm_i915_private *dev_priv = dev->dev_private; | |
297 | struct drm_crtc *crtc = dig_port->base.base.crtc; | |
298 | struct intel_crtc *intel_crtc = to_intel_crtc(crtc); | |
299 | ||
300 | lockdep_assert_held(&dev_priv->psr.lock); | |
301 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); | |
302 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); | |
303 | ||
304 | dev_priv->psr.source_ok = false; | |
305 | ||
306 | if (IS_HASWELL(dev) && dig_port->port != PORT_A) { | |
307 | DRM_DEBUG_KMS("HSW ties PSR to DDI A (eDP)\n"); | |
308 | return false; | |
309 | } | |
310 | ||
311 | if (!i915.enable_psr) { | |
312 | DRM_DEBUG_KMS("PSR disable by flag\n"); | |
313 | return false; | |
314 | } | |
315 | ||
c8e68b7e | 316 | if (IS_HASWELL(dev) && |
6e3c9717 | 317 | I915_READ(HSW_STEREO_3D_CTL(intel_crtc->config->cpu_transcoder)) & |
c8e68b7e | 318 | S3D_ENABLE) { |
0bc12bcb RV |
319 | DRM_DEBUG_KMS("PSR condition failed: Stereo 3D is Enabled\n"); |
320 | return false; | |
321 | } | |
322 | ||
c8e68b7e | 323 | if (IS_HASWELL(dev) && |
6e3c9717 | 324 | intel_crtc->config->base.adjusted_mode.flags & DRM_MODE_FLAG_INTERLACE) { |
0bc12bcb RV |
325 | DRM_DEBUG_KMS("PSR condition failed: Interlaced is Enabled\n"); |
326 | return false; | |
327 | } | |
328 | ||
89251b17 RV |
329 | if (!IS_VALLEYVIEW(dev) && ((dev_priv->vbt.psr.full_link) || |
330 | (dig_port->port != PORT_A))) { | |
331 | DRM_DEBUG_KMS("PSR condition failed: Link Standby requested/needed but not supported on this platform\n"); | |
332 | return false; | |
333 | } | |
334 | ||
0bc12bcb RV |
335 | dev_priv->psr.source_ok = true; |
336 | return true; | |
337 | } | |
338 | ||
e2bbc343 | 339 | static void intel_psr_activate(struct intel_dp *intel_dp) |
0bc12bcb RV |
340 | { |
341 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
342 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
343 | struct drm_i915_private *dev_priv = dev->dev_private; | |
344 | ||
443a389f | 345 | WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE); |
0bc12bcb RV |
346 | WARN_ON(dev_priv->psr.active); |
347 | lockdep_assert_held(&dev_priv->psr.lock); | |
348 | ||
995d3047 RV |
349 | /* Enable/Re-enable PSR on the host */ |
350 | if (HAS_DDI(dev)) | |
351 | /* On HSW+ after we enable PSR on source it will activate it | |
352 | * as soon as it match configure idle_frame count. So | |
353 | * we just actually enable it here on activation time. | |
354 | */ | |
355 | hsw_psr_enable_source(intel_dp); | |
356 | else | |
357 | vlv_psr_activate(intel_dp); | |
358 | ||
0bc12bcb RV |
359 | dev_priv->psr.active = true; |
360 | } | |
361 | ||
b2b89f55 RV |
362 | /** |
363 | * intel_psr_enable - Enable PSR | |
364 | * @intel_dp: Intel DP | |
365 | * | |
366 | * This function can only be called after the pipe is fully trained and enabled. | |
367 | */ | |
0bc12bcb RV |
368 | void intel_psr_enable(struct intel_dp *intel_dp) |
369 | { | |
370 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
371 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
372 | struct drm_i915_private *dev_priv = dev->dev_private; | |
474d1ec4 | 373 | struct intel_crtc *crtc = to_intel_crtc(intel_dig_port->base.base.crtc); |
0bc12bcb RV |
374 | |
375 | if (!HAS_PSR(dev)) { | |
376 | DRM_DEBUG_KMS("PSR not supported on this platform\n"); | |
377 | return; | |
378 | } | |
379 | ||
380 | if (!is_edp_psr(intel_dp)) { | |
381 | DRM_DEBUG_KMS("PSR not supported by this panel\n"); | |
382 | return; | |
383 | } | |
384 | ||
385 | mutex_lock(&dev_priv->psr.lock); | |
386 | if (dev_priv->psr.enabled) { | |
387 | DRM_DEBUG_KMS("PSR already in use\n"); | |
388 | goto unlock; | |
389 | } | |
390 | ||
391 | if (!intel_psr_match_conditions(intel_dp)) | |
392 | goto unlock; | |
393 | ||
394 | dev_priv->psr.busy_frontbuffer_bits = 0; | |
395 | ||
e2bbc343 RV |
396 | if (HAS_DDI(dev)) { |
397 | hsw_psr_setup_vsc(intel_dp); | |
0bc12bcb | 398 | |
474d1ec4 SJ |
399 | if (dev_priv->psr.psr2_support) { |
400 | /* PSR2 is restricted to work with panel resolutions upto 3200x2000 */ | |
401 | if (crtc->config->pipe_src_w > 3200 || | |
402 | crtc->config->pipe_src_h > 2000) | |
403 | dev_priv->psr.psr2_support = false; | |
404 | else | |
405 | skl_psr_setup_su_vsc(intel_dp); | |
406 | } | |
407 | ||
bb929cbc RV |
408 | /* |
409 | * Per Spec: Avoid continuous PSR exit by masking MEMUP and HPD. | |
410 | * Also mask LPSP to avoid dependency on other drivers that | |
411 | * might block runtime_pm besides preventing other hw tracking | |
412 | * issues now we can rely on frontbuffer tracking. | |
413 | */ | |
443a389f | 414 | I915_WRITE(EDP_PSR_DEBUG_CTL, EDP_PSR_DEBUG_MASK_MEMUP | |
bb929cbc | 415 | EDP_PSR_DEBUG_MASK_HPD | EDP_PSR_DEBUG_MASK_LPSP); |
0bc12bcb | 416 | |
e2bbc343 RV |
417 | /* Enable PSR on the panel */ |
418 | hsw_psr_enable_sink(intel_dp); | |
e3d99845 SJ |
419 | |
420 | if (INTEL_INFO(dev)->gen >= 9) | |
421 | intel_psr_activate(intel_dp); | |
e2bbc343 RV |
422 | } else { |
423 | vlv_psr_setup_vsc(intel_dp); | |
424 | ||
425 | /* Enable PSR on the panel */ | |
426 | vlv_psr_enable_sink(intel_dp); | |
427 | ||
428 | /* On HSW+ enable_source also means go to PSR entry/active | |
429 | * state as soon as idle_frame achieved and here would be | |
430 | * to soon. However on VLV enable_source just enable PSR | |
431 | * but let it on inactive state. So we might do this prior | |
432 | * to active transition, i.e. here. | |
433 | */ | |
434 | vlv_psr_enable_source(intel_dp); | |
435 | } | |
0bc12bcb | 436 | |
d0ac896a RV |
437 | /* |
438 | * FIXME: Activation should happen immediately since this function | |
439 | * is just called after pipe is fully trained and enabled. | |
440 | * However on every platform we face issues when first activation | |
441 | * follows a modeset so quickly. | |
442 | * - On VLV/CHV we get bank screen on first activation | |
443 | * - On HSW/BDW we get a recoverable frozen screen until next | |
444 | * exit-activate sequence. | |
445 | */ | |
446 | if (INTEL_INFO(dev)->gen < 9) | |
447 | schedule_delayed_work(&dev_priv->psr.work, | |
448 | msecs_to_jiffies(intel_dp->panel_power_cycle_delay * 5)); | |
449 | ||
0bc12bcb RV |
450 | dev_priv->psr.enabled = intel_dp; |
451 | unlock: | |
452 | mutex_unlock(&dev_priv->psr.lock); | |
453 | } | |
454 | ||
e2bbc343 | 455 | static void vlv_psr_disable(struct intel_dp *intel_dp) |
0bc12bcb RV |
456 | { |
457 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
458 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
459 | struct drm_i915_private *dev_priv = dev->dev_private; | |
e2bbc343 RV |
460 | struct intel_crtc *intel_crtc = |
461 | to_intel_crtc(intel_dig_port->base.base.crtc); | |
462 | uint32_t val; | |
0bc12bcb | 463 | |
e2bbc343 RV |
464 | if (dev_priv->psr.active) { |
465 | /* Put VLV PSR back to PSR_state 0 that is PSR Disabled. */ | |
466 | if (wait_for((I915_READ(VLV_PSRSTAT(intel_crtc->pipe)) & | |
467 | VLV_EDP_PSR_IN_TRANS) == 0, 1)) | |
468 | WARN(1, "PSR transition took longer than expected\n"); | |
469 | ||
470 | val = I915_READ(VLV_PSRCTL(intel_crtc->pipe)); | |
471 | val &= ~VLV_EDP_PSR_ACTIVE_ENTRY; | |
472 | val &= ~VLV_EDP_PSR_ENABLE; | |
473 | val &= ~VLV_EDP_PSR_MODE_MASK; | |
474 | I915_WRITE(VLV_PSRCTL(intel_crtc->pipe), val); | |
475 | ||
476 | dev_priv->psr.active = false; | |
477 | } else { | |
478 | WARN_ON(vlv_is_psr_active_on_pipe(dev, intel_crtc->pipe)); | |
0bc12bcb | 479 | } |
e2bbc343 RV |
480 | } |
481 | ||
482 | static void hsw_psr_disable(struct intel_dp *intel_dp) | |
483 | { | |
484 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
485 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
486 | struct drm_i915_private *dev_priv = dev->dev_private; | |
0bc12bcb RV |
487 | |
488 | if (dev_priv->psr.active) { | |
443a389f VS |
489 | I915_WRITE(EDP_PSR_CTL, |
490 | I915_READ(EDP_PSR_CTL) & ~EDP_PSR_ENABLE); | |
0bc12bcb RV |
491 | |
492 | /* Wait till PSR is idle */ | |
443a389f | 493 | if (_wait_for((I915_READ(EDP_PSR_STATUS_CTL) & |
0bc12bcb RV |
494 | EDP_PSR_STATUS_STATE_MASK) == 0, 2000, 10)) |
495 | DRM_ERROR("Timed out waiting for PSR Idle State\n"); | |
496 | ||
497 | dev_priv->psr.active = false; | |
498 | } else { | |
443a389f | 499 | WARN_ON(I915_READ(EDP_PSR_CTL) & EDP_PSR_ENABLE); |
0bc12bcb | 500 | } |
e2bbc343 RV |
501 | } |
502 | ||
503 | /** | |
504 | * intel_psr_disable - Disable PSR | |
505 | * @intel_dp: Intel DP | |
506 | * | |
507 | * This function needs to be called before disabling pipe. | |
508 | */ | |
509 | void intel_psr_disable(struct intel_dp *intel_dp) | |
510 | { | |
511 | struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp); | |
512 | struct drm_device *dev = intel_dig_port->base.base.dev; | |
513 | struct drm_i915_private *dev_priv = dev->dev_private; | |
514 | ||
515 | mutex_lock(&dev_priv->psr.lock); | |
516 | if (!dev_priv->psr.enabled) { | |
517 | mutex_unlock(&dev_priv->psr.lock); | |
518 | return; | |
519 | } | |
520 | ||
b6e4d534 | 521 | /* Disable PSR on Source */ |
e2bbc343 RV |
522 | if (HAS_DDI(dev)) |
523 | hsw_psr_disable(intel_dp); | |
524 | else | |
525 | vlv_psr_disable(intel_dp); | |
0bc12bcb | 526 | |
b6e4d534 RV |
527 | /* Disable PSR on Sink */ |
528 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_EN_CFG, 0); | |
529 | ||
0bc12bcb RV |
530 | dev_priv->psr.enabled = NULL; |
531 | mutex_unlock(&dev_priv->psr.lock); | |
532 | ||
533 | cancel_delayed_work_sync(&dev_priv->psr.work); | |
534 | } | |
535 | ||
536 | static void intel_psr_work(struct work_struct *work) | |
537 | { | |
538 | struct drm_i915_private *dev_priv = | |
539 | container_of(work, typeof(*dev_priv), psr.work.work); | |
540 | struct intel_dp *intel_dp = dev_priv->psr.enabled; | |
995d3047 RV |
541 | struct drm_crtc *crtc = dp_to_dig_port(intel_dp)->base.base.crtc; |
542 | enum pipe pipe = to_intel_crtc(crtc)->pipe; | |
0bc12bcb RV |
543 | |
544 | /* We have to make sure PSR is ready for re-enable | |
545 | * otherwise it keeps disabled until next full enable/disable cycle. | |
546 | * PSR might take some time to get fully disabled | |
547 | * and be ready for re-enable. | |
548 | */ | |
995d3047 | 549 | if (HAS_DDI(dev_priv->dev)) { |
443a389f | 550 | if (wait_for((I915_READ(EDP_PSR_STATUS_CTL) & |
995d3047 RV |
551 | EDP_PSR_STATUS_STATE_MASK) == 0, 50)) { |
552 | DRM_ERROR("Timed out waiting for PSR Idle for re-enable\n"); | |
553 | return; | |
554 | } | |
555 | } else { | |
556 | if (wait_for((I915_READ(VLV_PSRSTAT(pipe)) & | |
557 | VLV_EDP_PSR_IN_TRANS) == 0, 1)) { | |
558 | DRM_ERROR("Timed out waiting for PSR Idle for re-enable\n"); | |
559 | return; | |
560 | } | |
0bc12bcb | 561 | } |
0bc12bcb RV |
562 | mutex_lock(&dev_priv->psr.lock); |
563 | intel_dp = dev_priv->psr.enabled; | |
564 | ||
565 | if (!intel_dp) | |
566 | goto unlock; | |
567 | ||
568 | /* | |
569 | * The delayed work can race with an invalidate hence we need to | |
570 | * recheck. Since psr_flush first clears this and then reschedules we | |
571 | * won't ever miss a flush when bailing out here. | |
572 | */ | |
573 | if (dev_priv->psr.busy_frontbuffer_bits) | |
574 | goto unlock; | |
575 | ||
e2bbc343 | 576 | intel_psr_activate(intel_dp); |
0bc12bcb RV |
577 | unlock: |
578 | mutex_unlock(&dev_priv->psr.lock); | |
579 | } | |
580 | ||
581 | static void intel_psr_exit(struct drm_device *dev) | |
582 | { | |
583 | struct drm_i915_private *dev_priv = dev->dev_private; | |
995d3047 RV |
584 | struct intel_dp *intel_dp = dev_priv->psr.enabled; |
585 | struct drm_crtc *crtc = dp_to_dig_port(intel_dp)->base.base.crtc; | |
586 | enum pipe pipe = to_intel_crtc(crtc)->pipe; | |
587 | u32 val; | |
0bc12bcb | 588 | |
995d3047 RV |
589 | if (!dev_priv->psr.active) |
590 | return; | |
591 | ||
592 | if (HAS_DDI(dev)) { | |
443a389f | 593 | val = I915_READ(EDP_PSR_CTL); |
0bc12bcb RV |
594 | |
595 | WARN_ON(!(val & EDP_PSR_ENABLE)); | |
596 | ||
443a389f | 597 | I915_WRITE(EDP_PSR_CTL, val & ~EDP_PSR_ENABLE); |
995d3047 RV |
598 | } else { |
599 | val = I915_READ(VLV_PSRCTL(pipe)); | |
600 | ||
601 | /* Here we do the transition from PSR_state 3 to PSR_state 5 | |
602 | * directly once PSR State 4 that is active with single frame | |
603 | * update can be skipped. PSR_state 5 that is PSR exit then | |
604 | * Hardware is responsible to transition back to PSR_state 1 | |
605 | * that is PSR inactive. Same state after | |
606 | * vlv_edp_psr_enable_source. | |
607 | */ | |
608 | val &= ~VLV_EDP_PSR_ACTIVE_ENTRY; | |
609 | I915_WRITE(VLV_PSRCTL(pipe), val); | |
610 | ||
611 | /* Send AUX wake up - Spec says after transitioning to PSR | |
612 | * active we have to send AUX wake up by writing 01h in DPCD | |
613 | * 600h of sink device. | |
614 | * XXX: This might slow down the transition, but without this | |
615 | * HW doesn't complete the transition to PSR_state 1 and we | |
616 | * never get the screen updated. | |
617 | */ | |
618 | drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER, | |
619 | DP_SET_POWER_D0); | |
0bc12bcb RV |
620 | } |
621 | ||
995d3047 | 622 | dev_priv->psr.active = false; |
0bc12bcb RV |
623 | } |
624 | ||
c7240c3b RV |
625 | /** |
626 | * intel_psr_single_frame_update - Single Frame Update | |
627 | * @dev: DRM device | |
20c8838b | 628 | * @frontbuffer_bits: frontbuffer plane tracking bits |
c7240c3b RV |
629 | * |
630 | * Some platforms support a single frame update feature that is used to | |
631 | * send and update only one frame on Remote Frame Buffer. | |
632 | * So far it is only implemented for Valleyview and Cherryview because | |
633 | * hardware requires this to be done before a page flip. | |
634 | */ | |
20c8838b DV |
635 | void intel_psr_single_frame_update(struct drm_device *dev, |
636 | unsigned frontbuffer_bits) | |
c7240c3b RV |
637 | { |
638 | struct drm_i915_private *dev_priv = dev->dev_private; | |
639 | struct drm_crtc *crtc; | |
640 | enum pipe pipe; | |
641 | u32 val; | |
642 | ||
643 | /* | |
644 | * Single frame update is already supported on BDW+ but it requires | |
645 | * many W/A and it isn't really needed. | |
646 | */ | |
647 | if (!IS_VALLEYVIEW(dev)) | |
648 | return; | |
649 | ||
650 | mutex_lock(&dev_priv->psr.lock); | |
651 | if (!dev_priv->psr.enabled) { | |
652 | mutex_unlock(&dev_priv->psr.lock); | |
653 | return; | |
654 | } | |
655 | ||
656 | crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; | |
657 | pipe = to_intel_crtc(crtc)->pipe; | |
c7240c3b | 658 | |
20c8838b DV |
659 | if (frontbuffer_bits & INTEL_FRONTBUFFER_ALL_MASK(pipe)) { |
660 | val = I915_READ(VLV_PSRCTL(pipe)); | |
c7240c3b | 661 | |
20c8838b DV |
662 | /* |
663 | * We need to set this bit before writing registers for a flip. | |
664 | * This bit will be self-clear when it gets to the PSR active state. | |
665 | */ | |
666 | I915_WRITE(VLV_PSRCTL(pipe), val | VLV_EDP_PSR_SINGLE_FRAME_UPDATE); | |
667 | } | |
c7240c3b RV |
668 | mutex_unlock(&dev_priv->psr.lock); |
669 | } | |
670 | ||
b2b89f55 RV |
671 | /** |
672 | * intel_psr_invalidate - Invalidade PSR | |
673 | * @dev: DRM device | |
674 | * @frontbuffer_bits: frontbuffer plane tracking bits | |
675 | * | |
676 | * Since the hardware frontbuffer tracking has gaps we need to integrate | |
677 | * with the software frontbuffer tracking. This function gets called every | |
678 | * time frontbuffer rendering starts and a buffer gets dirtied. PSR must be | |
679 | * disabled if the frontbuffer mask contains a buffer relevant to PSR. | |
680 | * | |
681 | * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits." | |
682 | */ | |
0bc12bcb | 683 | void intel_psr_invalidate(struct drm_device *dev, |
20c8838b | 684 | unsigned frontbuffer_bits) |
0bc12bcb RV |
685 | { |
686 | struct drm_i915_private *dev_priv = dev->dev_private; | |
687 | struct drm_crtc *crtc; | |
688 | enum pipe pipe; | |
689 | ||
690 | mutex_lock(&dev_priv->psr.lock); | |
691 | if (!dev_priv->psr.enabled) { | |
692 | mutex_unlock(&dev_priv->psr.lock); | |
693 | return; | |
694 | } | |
695 | ||
696 | crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; | |
697 | pipe = to_intel_crtc(crtc)->pipe; | |
698 | ||
0bc12bcb | 699 | frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe); |
0bc12bcb | 700 | dev_priv->psr.busy_frontbuffer_bits |= frontbuffer_bits; |
ec76d629 DV |
701 | |
702 | if (frontbuffer_bits) | |
703 | intel_psr_exit(dev); | |
704 | ||
0bc12bcb RV |
705 | mutex_unlock(&dev_priv->psr.lock); |
706 | } | |
707 | ||
b2b89f55 RV |
708 | /** |
709 | * intel_psr_flush - Flush PSR | |
710 | * @dev: DRM device | |
711 | * @frontbuffer_bits: frontbuffer plane tracking bits | |
169de131 | 712 | * @origin: which operation caused the flush |
b2b89f55 RV |
713 | * |
714 | * Since the hardware frontbuffer tracking has gaps we need to integrate | |
715 | * with the software frontbuffer tracking. This function gets called every | |
716 | * time frontbuffer rendering has completed and flushed out to memory. PSR | |
717 | * can be enabled again if no other frontbuffer relevant to PSR is dirty. | |
718 | * | |
719 | * Dirty frontbuffers relevant to PSR are tracked in busy_frontbuffer_bits. | |
720 | */ | |
0bc12bcb | 721 | void intel_psr_flush(struct drm_device *dev, |
169de131 | 722 | unsigned frontbuffer_bits, enum fb_op_origin origin) |
0bc12bcb RV |
723 | { |
724 | struct drm_i915_private *dev_priv = dev->dev_private; | |
725 | struct drm_crtc *crtc; | |
726 | enum pipe pipe; | |
727 | ||
728 | mutex_lock(&dev_priv->psr.lock); | |
729 | if (!dev_priv->psr.enabled) { | |
730 | mutex_unlock(&dev_priv->psr.lock); | |
731 | return; | |
732 | } | |
733 | ||
734 | crtc = dp_to_dig_port(dev_priv->psr.enabled)->base.base.crtc; | |
735 | pipe = to_intel_crtc(crtc)->pipe; | |
ec76d629 DV |
736 | |
737 | frontbuffer_bits &= INTEL_FRONTBUFFER_ALL_MASK(pipe); | |
0bc12bcb RV |
738 | dev_priv->psr.busy_frontbuffer_bits &= ~frontbuffer_bits; |
739 | ||
921ec285 RV |
740 | /* By definition flush = invalidate + flush */ |
741 | if (frontbuffer_bits) | |
742 | intel_psr_exit(dev); | |
995d3047 | 743 | |
0bc12bcb | 744 | if (!dev_priv->psr.active && !dev_priv->psr.busy_frontbuffer_bits) |
d0ac896a RV |
745 | if (!work_busy(&dev_priv->psr.work.work)) |
746 | schedule_delayed_work(&dev_priv->psr.work, | |
20bb97fe | 747 | msecs_to_jiffies(100)); |
0bc12bcb RV |
748 | mutex_unlock(&dev_priv->psr.lock); |
749 | } | |
750 | ||
b2b89f55 RV |
751 | /** |
752 | * intel_psr_init - Init basic PSR work and mutex. | |
753 | * @dev: DRM device | |
754 | * | |
755 | * This function is called only once at driver load to initialize basic | |
756 | * PSR stuff. | |
757 | */ | |
0bc12bcb RV |
758 | void intel_psr_init(struct drm_device *dev) |
759 | { | |
760 | struct drm_i915_private *dev_priv = dev->dev_private; | |
761 | ||
443a389f VS |
762 | dev_priv->psr_mmio_base = IS_HASWELL(dev_priv) ? |
763 | HSW_EDP_PSR_BASE : BDW_EDP_PSR_BASE; | |
764 | ||
0bc12bcb RV |
765 | INIT_DELAYED_WORK(&dev_priv->psr.work, intel_psr_work); |
766 | mutex_init(&dev_priv->psr.lock); | |
767 | } |