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4e646495 JN |
1 | /* |
2 | * Copyright © 2013 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 | * Author: Jani Nikula <jani.nikula@intel.com> | |
24 | */ | |
25 | ||
26 | #include <drm/drmP.h> | |
c6f95f27 | 27 | #include <drm/drm_atomic_helper.h> |
4e646495 JN |
28 | #include <drm/drm_crtc.h> |
29 | #include <drm/drm_edid.h> | |
30 | #include <drm/i915_drm.h> | |
593e0622 | 31 | #include <drm/drm_panel.h> |
7e9804fd | 32 | #include <drm/drm_mipi_dsi.h> |
4e646495 | 33 | #include <linux/slab.h> |
fc45e821 | 34 | #include <linux/gpio/consumer.h> |
4e646495 JN |
35 | #include "i915_drv.h" |
36 | #include "intel_drv.h" | |
37 | #include "intel_dsi.h" | |
4e646495 | 38 | |
593e0622 JN |
39 | static const struct { |
40 | u16 panel_id; | |
41 | struct drm_panel * (*init)(struct intel_dsi *intel_dsi, u16 panel_id); | |
42 | } intel_dsi_drivers[] = { | |
2ab8b458 SK |
43 | { |
44 | .panel_id = MIPI_DSI_GENERIC_PANEL_ID, | |
593e0622 | 45 | .init = vbt_panel_init, |
2ab8b458 | 46 | }, |
4e646495 JN |
47 | }; |
48 | ||
7f6a6a4a | 49 | static void wait_for_dsi_fifo_empty(struct intel_dsi *intel_dsi, enum port port) |
3b1808bf JN |
50 | { |
51 | struct drm_encoder *encoder = &intel_dsi->base.base; | |
52 | struct drm_device *dev = encoder->dev; | |
53 | struct drm_i915_private *dev_priv = dev->dev_private; | |
3b1808bf JN |
54 | u32 mask; |
55 | ||
56 | mask = LP_CTRL_FIFO_EMPTY | HS_CTRL_FIFO_EMPTY | | |
57 | LP_DATA_FIFO_EMPTY | HS_DATA_FIFO_EMPTY; | |
58 | ||
59 | if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & mask) == mask, 100)) | |
60 | DRM_ERROR("DPI FIFOs are not empty\n"); | |
61 | } | |
62 | ||
f0f59a00 VS |
63 | static void write_data(struct drm_i915_private *dev_priv, |
64 | i915_reg_t reg, | |
7e9804fd JN |
65 | const u8 *data, u32 len) |
66 | { | |
67 | u32 i, j; | |
68 | ||
69 | for (i = 0; i < len; i += 4) { | |
70 | u32 val = 0; | |
71 | ||
72 | for (j = 0; j < min_t(u32, len - i, 4); j++) | |
73 | val |= *data++ << 8 * j; | |
74 | ||
75 | I915_WRITE(reg, val); | |
76 | } | |
77 | } | |
78 | ||
f0f59a00 VS |
79 | static void read_data(struct drm_i915_private *dev_priv, |
80 | i915_reg_t reg, | |
7e9804fd JN |
81 | u8 *data, u32 len) |
82 | { | |
83 | u32 i, j; | |
84 | ||
85 | for (i = 0; i < len; i += 4) { | |
86 | u32 val = I915_READ(reg); | |
87 | ||
88 | for (j = 0; j < min_t(u32, len - i, 4); j++) | |
89 | *data++ = val >> 8 * j; | |
90 | } | |
91 | } | |
92 | ||
93 | static ssize_t intel_dsi_host_transfer(struct mipi_dsi_host *host, | |
94 | const struct mipi_dsi_msg *msg) | |
95 | { | |
96 | struct intel_dsi_host *intel_dsi_host = to_intel_dsi_host(host); | |
97 | struct drm_device *dev = intel_dsi_host->intel_dsi->base.base.dev; | |
98 | struct drm_i915_private *dev_priv = dev->dev_private; | |
99 | enum port port = intel_dsi_host->port; | |
100 | struct mipi_dsi_packet packet; | |
101 | ssize_t ret; | |
102 | const u8 *header, *data; | |
f0f59a00 VS |
103 | i915_reg_t data_reg, ctrl_reg; |
104 | u32 data_mask, ctrl_mask; | |
7e9804fd JN |
105 | |
106 | ret = mipi_dsi_create_packet(&packet, msg); | |
107 | if (ret < 0) | |
108 | return ret; | |
109 | ||
110 | header = packet.header; | |
111 | data = packet.payload; | |
112 | ||
113 | if (msg->flags & MIPI_DSI_MSG_USE_LPM) { | |
114 | data_reg = MIPI_LP_GEN_DATA(port); | |
115 | data_mask = LP_DATA_FIFO_FULL; | |
116 | ctrl_reg = MIPI_LP_GEN_CTRL(port); | |
117 | ctrl_mask = LP_CTRL_FIFO_FULL; | |
118 | } else { | |
119 | data_reg = MIPI_HS_GEN_DATA(port); | |
120 | data_mask = HS_DATA_FIFO_FULL; | |
121 | ctrl_reg = MIPI_HS_GEN_CTRL(port); | |
122 | ctrl_mask = HS_CTRL_FIFO_FULL; | |
123 | } | |
124 | ||
125 | /* note: this is never true for reads */ | |
126 | if (packet.payload_length) { | |
127 | ||
128 | if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & data_mask) == 0, 50)) | |
129 | DRM_ERROR("Timeout waiting for HS/LP DATA FIFO !full\n"); | |
130 | ||
131 | write_data(dev_priv, data_reg, packet.payload, | |
132 | packet.payload_length); | |
133 | } | |
134 | ||
135 | if (msg->rx_len) { | |
136 | I915_WRITE(MIPI_INTR_STAT(port), GEN_READ_DATA_AVAIL); | |
137 | } | |
138 | ||
139 | if (wait_for((I915_READ(MIPI_GEN_FIFO_STAT(port)) & ctrl_mask) == 0, 50)) { | |
140 | DRM_ERROR("Timeout waiting for HS/LP CTRL FIFO !full\n"); | |
141 | } | |
142 | ||
143 | I915_WRITE(ctrl_reg, header[2] << 16 | header[1] << 8 | header[0]); | |
144 | ||
145 | /* ->rx_len is set only for reads */ | |
146 | if (msg->rx_len) { | |
147 | data_mask = GEN_READ_DATA_AVAIL; | |
148 | if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & data_mask) == data_mask, 50)) | |
149 | DRM_ERROR("Timeout waiting for read data.\n"); | |
150 | ||
151 | read_data(dev_priv, data_reg, msg->rx_buf, msg->rx_len); | |
152 | } | |
153 | ||
154 | /* XXX: fix for reads and writes */ | |
155 | return 4 + packet.payload_length; | |
156 | } | |
157 | ||
158 | static int intel_dsi_host_attach(struct mipi_dsi_host *host, | |
159 | struct mipi_dsi_device *dsi) | |
160 | { | |
161 | return 0; | |
162 | } | |
163 | ||
164 | static int intel_dsi_host_detach(struct mipi_dsi_host *host, | |
165 | struct mipi_dsi_device *dsi) | |
166 | { | |
167 | return 0; | |
168 | } | |
169 | ||
170 | static const struct mipi_dsi_host_ops intel_dsi_host_ops = { | |
171 | .attach = intel_dsi_host_attach, | |
172 | .detach = intel_dsi_host_detach, | |
173 | .transfer = intel_dsi_host_transfer, | |
174 | }; | |
175 | ||
176 | static struct intel_dsi_host *intel_dsi_host_init(struct intel_dsi *intel_dsi, | |
177 | enum port port) | |
178 | { | |
179 | struct intel_dsi_host *host; | |
180 | struct mipi_dsi_device *device; | |
181 | ||
182 | host = kzalloc(sizeof(*host), GFP_KERNEL); | |
183 | if (!host) | |
184 | return NULL; | |
185 | ||
186 | host->base.ops = &intel_dsi_host_ops; | |
187 | host->intel_dsi = intel_dsi; | |
188 | host->port = port; | |
189 | ||
190 | /* | |
191 | * We should call mipi_dsi_host_register(&host->base) here, but we don't | |
192 | * have a host->dev, and we don't have OF stuff either. So just use the | |
193 | * dsi framework as a library and hope for the best. Create the dsi | |
194 | * devices by ourselves here too. Need to be careful though, because we | |
195 | * don't initialize any of the driver model devices here. | |
196 | */ | |
197 | device = kzalloc(sizeof(*device), GFP_KERNEL); | |
198 | if (!device) { | |
199 | kfree(host); | |
200 | return NULL; | |
201 | } | |
202 | ||
203 | device->host = &host->base; | |
204 | host->device = device; | |
205 | ||
206 | return host; | |
207 | } | |
208 | ||
a2581a9e JN |
209 | /* |
210 | * send a video mode command | |
211 | * | |
212 | * XXX: commands with data in MIPI_DPI_DATA? | |
213 | */ | |
214 | static int dpi_send_cmd(struct intel_dsi *intel_dsi, u32 cmd, bool hs, | |
215 | enum port port) | |
216 | { | |
217 | struct drm_encoder *encoder = &intel_dsi->base.base; | |
218 | struct drm_device *dev = encoder->dev; | |
219 | struct drm_i915_private *dev_priv = dev->dev_private; | |
220 | u32 mask; | |
221 | ||
222 | /* XXX: pipe, hs */ | |
223 | if (hs) | |
224 | cmd &= ~DPI_LP_MODE; | |
225 | else | |
226 | cmd |= DPI_LP_MODE; | |
227 | ||
228 | /* clear bit */ | |
229 | I915_WRITE(MIPI_INTR_STAT(port), SPL_PKT_SENT_INTERRUPT); | |
230 | ||
231 | /* XXX: old code skips write if control unchanged */ | |
232 | if (cmd == I915_READ(MIPI_DPI_CONTROL(port))) | |
233 | DRM_ERROR("Same special packet %02x twice in a row.\n", cmd); | |
234 | ||
235 | I915_WRITE(MIPI_DPI_CONTROL(port), cmd); | |
236 | ||
237 | mask = SPL_PKT_SENT_INTERRUPT; | |
238 | if (wait_for((I915_READ(MIPI_INTR_STAT(port)) & mask) == mask, 100)) | |
239 | DRM_ERROR("Video mode command 0x%08x send failed.\n", cmd); | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
e9fe51c6 | 244 | static void band_gap_reset(struct drm_i915_private *dev_priv) |
4ce8c9a7 | 245 | { |
a580516d | 246 | mutex_lock(&dev_priv->sb_lock); |
4ce8c9a7 | 247 | |
e9fe51c6 SK |
248 | vlv_flisdsi_write(dev_priv, 0x08, 0x0001); |
249 | vlv_flisdsi_write(dev_priv, 0x0F, 0x0005); | |
250 | vlv_flisdsi_write(dev_priv, 0x0F, 0x0025); | |
251 | udelay(150); | |
252 | vlv_flisdsi_write(dev_priv, 0x0F, 0x0000); | |
253 | vlv_flisdsi_write(dev_priv, 0x08, 0x0000); | |
4ce8c9a7 | 254 | |
a580516d | 255 | mutex_unlock(&dev_priv->sb_lock); |
4ce8c9a7 SK |
256 | } |
257 | ||
4e646495 JN |
258 | static inline bool is_vid_mode(struct intel_dsi *intel_dsi) |
259 | { | |
dfba2e2d | 260 | return intel_dsi->operation_mode == INTEL_DSI_VIDEO_MODE; |
4e646495 JN |
261 | } |
262 | ||
263 | static inline bool is_cmd_mode(struct intel_dsi *intel_dsi) | |
264 | { | |
dfba2e2d | 265 | return intel_dsi->operation_mode == INTEL_DSI_COMMAND_MODE; |
4e646495 JN |
266 | } |
267 | ||
4e646495 | 268 | static bool intel_dsi_compute_config(struct intel_encoder *encoder, |
a65347ba | 269 | struct intel_crtc_state *pipe_config) |
4e646495 JN |
270 | { |
271 | struct intel_dsi *intel_dsi = container_of(encoder, struct intel_dsi, | |
272 | base); | |
273 | struct intel_connector *intel_connector = intel_dsi->attached_connector; | |
274 | struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; | |
a65347ba | 275 | struct drm_display_mode *adjusted_mode = &pipe_config->base.adjusted_mode; |
4e646495 JN |
276 | |
277 | DRM_DEBUG_KMS("\n"); | |
278 | ||
a65347ba JN |
279 | pipe_config->has_dsi_encoder = true; |
280 | ||
4e646495 JN |
281 | if (fixed_mode) |
282 | intel_fixed_panel_mode(fixed_mode, adjusted_mode); | |
283 | ||
f573de5a SK |
284 | /* DSI uses short packets for sync events, so clear mode flags for DSI */ |
285 | adjusted_mode->flags = 0; | |
286 | ||
4e646495 JN |
287 | return true; |
288 | } | |
289 | ||
37ab0810 | 290 | static void bxt_dsi_device_ready(struct intel_encoder *encoder) |
5505a244 | 291 | { |
37ab0810 | 292 | struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; |
5505a244 | 293 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
369602d3 | 294 | enum port port; |
37ab0810 | 295 | u32 val; |
5505a244 | 296 | |
37ab0810 | 297 | DRM_DEBUG_KMS("\n"); |
a9da9bce | 298 | |
37ab0810 | 299 | /* Exit Low power state in 4 steps*/ |
369602d3 | 300 | for_each_dsi_port(port, intel_dsi->ports) { |
5505a244 | 301 | |
37ab0810 SS |
302 | /* 1. Enable MIPI PHY transparent latch */ |
303 | val = I915_READ(BXT_MIPI_PORT_CTRL(port)); | |
304 | I915_WRITE(BXT_MIPI_PORT_CTRL(port), val | LP_OUTPUT_HOLD); | |
305 | usleep_range(2000, 2500); | |
306 | ||
307 | /* 2. Enter ULPS */ | |
308 | val = I915_READ(MIPI_DEVICE_READY(port)); | |
309 | val &= ~ULPS_STATE_MASK; | |
310 | val |= (ULPS_STATE_ENTER | DEVICE_READY); | |
311 | I915_WRITE(MIPI_DEVICE_READY(port), val); | |
312 | usleep_range(2, 3); | |
313 | ||
314 | /* 3. Exit ULPS */ | |
315 | val = I915_READ(MIPI_DEVICE_READY(port)); | |
316 | val &= ~ULPS_STATE_MASK; | |
317 | val |= (ULPS_STATE_EXIT | DEVICE_READY); | |
318 | I915_WRITE(MIPI_DEVICE_READY(port), val); | |
319 | usleep_range(1000, 1500); | |
5505a244 | 320 | |
37ab0810 SS |
321 | /* Clear ULPS and set device ready */ |
322 | val = I915_READ(MIPI_DEVICE_READY(port)); | |
323 | val &= ~ULPS_STATE_MASK; | |
324 | val |= DEVICE_READY; | |
325 | I915_WRITE(MIPI_DEVICE_READY(port), val); | |
369602d3 | 326 | } |
5505a244 GS |
327 | } |
328 | ||
37ab0810 | 329 | static void vlv_dsi_device_ready(struct intel_encoder *encoder) |
4e646495 | 330 | { |
1dbd7cb2 | 331 | struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; |
24ee0e64 GS |
332 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
333 | enum port port; | |
1dbd7cb2 SK |
334 | u32 val; |
335 | ||
4e646495 | 336 | DRM_DEBUG_KMS("\n"); |
4e646495 | 337 | |
a580516d | 338 | mutex_lock(&dev_priv->sb_lock); |
2095f9fc SK |
339 | /* program rcomp for compliance, reduce from 50 ohms to 45 ohms |
340 | * needed everytime after power gate */ | |
341 | vlv_flisdsi_write(dev_priv, 0x04, 0x0004); | |
a580516d | 342 | mutex_unlock(&dev_priv->sb_lock); |
2095f9fc SK |
343 | |
344 | /* bandgap reset is needed after everytime we do power gate */ | |
345 | band_gap_reset(dev_priv); | |
346 | ||
24ee0e64 | 347 | for_each_dsi_port(port, intel_dsi->ports) { |
aceb365c | 348 | |
24ee0e64 GS |
349 | I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_ENTER); |
350 | usleep_range(2500, 3000); | |
aceb365c | 351 | |
bf344e80 GS |
352 | /* Enable MIPI PHY transparent latch |
353 | * Common bit for both MIPI Port A & MIPI Port C | |
354 | * No similar bit in MIPI Port C reg | |
355 | */ | |
4ba7d93a | 356 | val = I915_READ(MIPI_PORT_CTRL(PORT_A)); |
bf344e80 | 357 | I915_WRITE(MIPI_PORT_CTRL(PORT_A), val | LP_OUTPUT_HOLD); |
24ee0e64 | 358 | usleep_range(1000, 1500); |
aceb365c | 359 | |
24ee0e64 GS |
360 | I915_WRITE(MIPI_DEVICE_READY(port), ULPS_STATE_EXIT); |
361 | usleep_range(2500, 3000); | |
362 | ||
363 | I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY); | |
364 | usleep_range(2500, 3000); | |
365 | } | |
1dbd7cb2 | 366 | } |
1dbd7cb2 | 367 | |
37ab0810 SS |
368 | static void intel_dsi_device_ready(struct intel_encoder *encoder) |
369 | { | |
370 | struct drm_device *dev = encoder->base.dev; | |
371 | ||
666a4537 | 372 | if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) |
37ab0810 SS |
373 | vlv_dsi_device_ready(encoder); |
374 | else if (IS_BROXTON(dev)) | |
375 | bxt_dsi_device_ready(encoder); | |
376 | } | |
377 | ||
378 | static void intel_dsi_port_enable(struct intel_encoder *encoder) | |
379 | { | |
380 | struct drm_device *dev = encoder->base.dev; | |
381 | struct drm_i915_private *dev_priv = dev->dev_private; | |
382 | struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); | |
383 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); | |
384 | enum port port; | |
37ab0810 SS |
385 | |
386 | if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) { | |
f0f59a00 VS |
387 | u32 temp; |
388 | ||
37ab0810 SS |
389 | temp = I915_READ(VLV_CHICKEN_3); |
390 | temp &= ~PIXEL_OVERLAP_CNT_MASK | | |
391 | intel_dsi->pixel_overlap << | |
392 | PIXEL_OVERLAP_CNT_SHIFT; | |
393 | I915_WRITE(VLV_CHICKEN_3, temp); | |
394 | } | |
395 | ||
396 | for_each_dsi_port(port, intel_dsi->ports) { | |
f0f59a00 VS |
397 | i915_reg_t port_ctrl = IS_BROXTON(dev) ? |
398 | BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port); | |
399 | u32 temp; | |
37ab0810 SS |
400 | |
401 | temp = I915_READ(port_ctrl); | |
402 | ||
403 | temp &= ~LANE_CONFIGURATION_MASK; | |
404 | temp &= ~DUAL_LINK_MODE_MASK; | |
405 | ||
406 | if (intel_dsi->ports == ((1 << PORT_A) | (1 << PORT_C))) { | |
407 | temp |= (intel_dsi->dual_link - 1) | |
408 | << DUAL_LINK_MODE_SHIFT; | |
409 | temp |= intel_crtc->pipe ? | |
410 | LANE_CONFIGURATION_DUAL_LINK_B : | |
411 | LANE_CONFIGURATION_DUAL_LINK_A; | |
412 | } | |
413 | /* assert ip_tg_enable signal */ | |
414 | I915_WRITE(port_ctrl, temp | DPI_ENABLE); | |
415 | POSTING_READ(port_ctrl); | |
416 | } | |
417 | } | |
418 | ||
419 | static void intel_dsi_port_disable(struct intel_encoder *encoder) | |
420 | { | |
421 | struct drm_device *dev = encoder->base.dev; | |
422 | struct drm_i915_private *dev_priv = dev->dev_private; | |
423 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); | |
424 | enum port port; | |
37ab0810 SS |
425 | |
426 | for_each_dsi_port(port, intel_dsi->ports) { | |
f0f59a00 VS |
427 | i915_reg_t port_ctrl = IS_BROXTON(dev) ? |
428 | BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port); | |
429 | u32 temp; | |
430 | ||
37ab0810 | 431 | /* de-assert ip_tg_enable signal */ |
b389a45c SS |
432 | temp = I915_READ(port_ctrl); |
433 | I915_WRITE(port_ctrl, temp & ~DPI_ENABLE); | |
434 | POSTING_READ(port_ctrl); | |
37ab0810 SS |
435 | } |
436 | } | |
437 | ||
1dbd7cb2 SK |
438 | static void intel_dsi_enable(struct intel_encoder *encoder) |
439 | { | |
440 | struct drm_device *dev = encoder->base.dev; | |
441 | struct drm_i915_private *dev_priv = dev->dev_private; | |
1dbd7cb2 | 442 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
4934b656 | 443 | enum port port; |
1dbd7cb2 SK |
444 | |
445 | DRM_DEBUG_KMS("\n"); | |
b9f5e07d | 446 | |
4934b656 JN |
447 | if (is_cmd_mode(intel_dsi)) { |
448 | for_each_dsi_port(port, intel_dsi->ports) | |
449 | I915_WRITE(MIPI_MAX_RETURN_PKT_SIZE(port), 8 * 4); | |
450 | } else { | |
4e646495 | 451 | msleep(20); /* XXX */ |
f03e4179 | 452 | for_each_dsi_port(port, intel_dsi->ports) |
a2581a9e | 453 | dpi_send_cmd(intel_dsi, TURN_ON, false, port); |
4e646495 JN |
454 | msleep(100); |
455 | ||
593e0622 | 456 | drm_panel_enable(intel_dsi->panel); |
2634fd7f | 457 | |
7f6a6a4a JN |
458 | for_each_dsi_port(port, intel_dsi->ports) |
459 | wait_for_dsi_fifo_empty(intel_dsi, port); | |
1381308b | 460 | |
5505a244 | 461 | intel_dsi_port_enable(encoder); |
4e646495 | 462 | } |
b029e66f SK |
463 | |
464 | intel_panel_enable_backlight(intel_dsi->attached_connector); | |
2634fd7f SK |
465 | } |
466 | ||
e3488e75 JN |
467 | static void intel_dsi_prepare(struct intel_encoder *intel_encoder); |
468 | ||
2634fd7f SK |
469 | static void intel_dsi_pre_enable(struct intel_encoder *encoder) |
470 | { | |
20e5bf66 SK |
471 | struct drm_device *dev = encoder->base.dev; |
472 | struct drm_i915_private *dev_priv = dev->dev_private; | |
2634fd7f | 473 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
20e5bf66 SK |
474 | struct intel_crtc *intel_crtc = to_intel_crtc(encoder->base.crtc); |
475 | enum pipe pipe = intel_crtc->pipe; | |
7f6a6a4a | 476 | enum port port; |
20e5bf66 | 477 | u32 tmp; |
2634fd7f SK |
478 | |
479 | DRM_DEBUG_KMS("\n"); | |
480 | ||
e3488e75 JN |
481 | intel_dsi_prepare(encoder); |
482 | intel_enable_dsi_pll(encoder); | |
483 | ||
fc45e821 SK |
484 | /* Panel Enable over CRC PMIC */ |
485 | if (intel_dsi->gpio_panel) | |
486 | gpiod_set_value_cansleep(intel_dsi->gpio_panel, 1); | |
487 | ||
488 | msleep(intel_dsi->panel_on_delay); | |
489 | ||
666a4537 | 490 | if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) { |
37ab0810 SS |
491 | /* |
492 | * Disable DPOunit clock gating, can stall pipe | |
493 | * and we need DPLL REFA always enabled | |
494 | */ | |
495 | tmp = I915_READ(DPLL(pipe)); | |
496 | tmp |= DPLL_REF_CLK_ENABLE_VLV; | |
497 | I915_WRITE(DPLL(pipe), tmp); | |
498 | ||
499 | /* update the hw state for DPLL */ | |
500 | intel_crtc->config->dpll_hw_state.dpll = | |
501 | DPLL_INTEGRATED_REF_CLK_VLV | | |
502 | DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS; | |
503 | ||
504 | tmp = I915_READ(DSPCLK_GATE_D); | |
505 | tmp |= DPOUNIT_CLOCK_GATE_DISABLE; | |
506 | I915_WRITE(DSPCLK_GATE_D, tmp); | |
507 | } | |
2634fd7f SK |
508 | |
509 | /* put device in ready state */ | |
510 | intel_dsi_device_ready(encoder); | |
4e646495 | 511 | |
593e0622 | 512 | drm_panel_prepare(intel_dsi->panel); |
20e5bf66 | 513 | |
7f6a6a4a JN |
514 | for_each_dsi_port(port, intel_dsi->ports) |
515 | wait_for_dsi_fifo_empty(intel_dsi, port); | |
1381308b | 516 | |
2634fd7f SK |
517 | /* Enable port in pre-enable phase itself because as per hw team |
518 | * recommendation, port should be enabled befor plane & pipe */ | |
519 | intel_dsi_enable(encoder); | |
520 | } | |
521 | ||
522 | static void intel_dsi_enable_nop(struct intel_encoder *encoder) | |
523 | { | |
524 | DRM_DEBUG_KMS("\n"); | |
525 | ||
526 | /* for DSI port enable has to be done before pipe | |
527 | * and plane enable, so port enable is done in | |
528 | * pre_enable phase itself unlike other encoders | |
529 | */ | |
4e646495 JN |
530 | } |
531 | ||
c315faf8 ID |
532 | static void intel_dsi_pre_disable(struct intel_encoder *encoder) |
533 | { | |
534 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); | |
f03e4179 | 535 | enum port port; |
c315faf8 ID |
536 | |
537 | DRM_DEBUG_KMS("\n"); | |
538 | ||
b029e66f SK |
539 | intel_panel_disable_backlight(intel_dsi->attached_connector); |
540 | ||
c315faf8 ID |
541 | if (is_vid_mode(intel_dsi)) { |
542 | /* Send Shutdown command to the panel in LP mode */ | |
f03e4179 | 543 | for_each_dsi_port(port, intel_dsi->ports) |
a2581a9e | 544 | dpi_send_cmd(intel_dsi, SHUTDOWN, false, port); |
c315faf8 ID |
545 | msleep(10); |
546 | } | |
547 | } | |
548 | ||
4e646495 JN |
549 | static void intel_dsi_disable(struct intel_encoder *encoder) |
550 | { | |
1dbd7cb2 SK |
551 | struct drm_device *dev = encoder->base.dev; |
552 | struct drm_i915_private *dev_priv = dev->dev_private; | |
4e646495 | 553 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
384f02a2 | 554 | enum port port; |
4e646495 JN |
555 | u32 temp; |
556 | ||
557 | DRM_DEBUG_KMS("\n"); | |
558 | ||
4e646495 | 559 | if (is_vid_mode(intel_dsi)) { |
7f6a6a4a JN |
560 | for_each_dsi_port(port, intel_dsi->ports) |
561 | wait_for_dsi_fifo_empty(intel_dsi, port); | |
1381308b | 562 | |
5505a244 | 563 | intel_dsi_port_disable(encoder); |
4e646495 JN |
564 | msleep(2); |
565 | } | |
566 | ||
384f02a2 GS |
567 | for_each_dsi_port(port, intel_dsi->ports) { |
568 | /* Panel commands can be sent when clock is in LP11 */ | |
569 | I915_WRITE(MIPI_DEVICE_READY(port), 0x0); | |
339023ec | 570 | |
b389a45c | 571 | intel_dsi_reset_clocks(encoder, port); |
384f02a2 | 572 | I915_WRITE(MIPI_EOT_DISABLE(port), CLOCKSTOP); |
339023ec | 573 | |
384f02a2 GS |
574 | temp = I915_READ(MIPI_DSI_FUNC_PRG(port)); |
575 | temp &= ~VID_MODE_FORMAT_MASK; | |
576 | I915_WRITE(MIPI_DSI_FUNC_PRG(port), temp); | |
339023ec | 577 | |
384f02a2 GS |
578 | I915_WRITE(MIPI_DEVICE_READY(port), 0x1); |
579 | } | |
1dbd7cb2 SK |
580 | /* if disable packets are sent before sending shutdown packet then in |
581 | * some next enable sequence send turn on packet error is observed */ | |
593e0622 | 582 | drm_panel_disable(intel_dsi->panel); |
1381308b | 583 | |
7f6a6a4a JN |
584 | for_each_dsi_port(port, intel_dsi->ports) |
585 | wait_for_dsi_fifo_empty(intel_dsi, port); | |
4e646495 JN |
586 | } |
587 | ||
1dbd7cb2 | 588 | static void intel_dsi_clear_device_ready(struct intel_encoder *encoder) |
4e646495 | 589 | { |
b389a45c | 590 | struct drm_device *dev = encoder->base.dev; |
1dbd7cb2 | 591 | struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; |
384f02a2 GS |
592 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
593 | enum port port; | |
1dbd7cb2 | 594 | |
4e646495 | 595 | DRM_DEBUG_KMS("\n"); |
384f02a2 | 596 | for_each_dsi_port(port, intel_dsi->ports) { |
f0f59a00 VS |
597 | /* Common bit for both MIPI Port A & MIPI Port C on VLV/CHV */ |
598 | i915_reg_t port_ctrl = IS_BROXTON(dev) ? | |
599 | BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(PORT_A); | |
600 | u32 val; | |
be4fc046 | 601 | |
384f02a2 GS |
602 | I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY | |
603 | ULPS_STATE_ENTER); | |
604 | usleep_range(2000, 2500); | |
605 | ||
606 | I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY | | |
607 | ULPS_STATE_EXIT); | |
608 | usleep_range(2000, 2500); | |
609 | ||
610 | I915_WRITE(MIPI_DEVICE_READY(port), DEVICE_READY | | |
611 | ULPS_STATE_ENTER); | |
612 | usleep_range(2000, 2500); | |
613 | ||
614 | /* Wait till Clock lanes are in LP-00 state for MIPI Port A | |
615 | * only. MIPI Port C has no similar bit for checking | |
616 | */ | |
b389a45c SS |
617 | if (wait_for(((I915_READ(port_ctrl) & AFE_LATCHOUT) |
618 | == 0x00000), 30)) | |
384f02a2 GS |
619 | DRM_ERROR("DSI LP not going Low\n"); |
620 | ||
b389a45c SS |
621 | /* Disable MIPI PHY transparent latch */ |
622 | val = I915_READ(port_ctrl); | |
623 | I915_WRITE(port_ctrl, val & ~LP_OUTPUT_HOLD); | |
384f02a2 GS |
624 | usleep_range(1000, 1500); |
625 | ||
626 | I915_WRITE(MIPI_DEVICE_READY(port), 0x00); | |
627 | usleep_range(2000, 2500); | |
628 | } | |
1dbd7cb2 | 629 | |
fe88fc68 | 630 | intel_disable_dsi_pll(encoder); |
4e646495 | 631 | } |
20e5bf66 | 632 | |
1dbd7cb2 SK |
633 | static void intel_dsi_post_disable(struct intel_encoder *encoder) |
634 | { | |
20e5bf66 | 635 | struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; |
1dbd7cb2 | 636 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
20e5bf66 | 637 | u32 val; |
1dbd7cb2 SK |
638 | |
639 | DRM_DEBUG_KMS("\n"); | |
640 | ||
c315faf8 ID |
641 | intel_dsi_disable(encoder); |
642 | ||
1dbd7cb2 SK |
643 | intel_dsi_clear_device_ready(encoder); |
644 | ||
20e5bf66 SK |
645 | val = I915_READ(DSPCLK_GATE_D); |
646 | val &= ~DPOUNIT_CLOCK_GATE_DISABLE; | |
647 | I915_WRITE(DSPCLK_GATE_D, val); | |
648 | ||
593e0622 | 649 | drm_panel_unprepare(intel_dsi->panel); |
df38e655 SK |
650 | |
651 | msleep(intel_dsi->panel_off_delay); | |
652 | msleep(intel_dsi->panel_pwr_cycle_delay); | |
fc45e821 SK |
653 | |
654 | /* Panel Disable over CRC PMIC */ | |
655 | if (intel_dsi->gpio_panel) | |
656 | gpiod_set_value_cansleep(intel_dsi->gpio_panel, 0); | |
1dbd7cb2 | 657 | } |
4e646495 JN |
658 | |
659 | static bool intel_dsi_get_hw_state(struct intel_encoder *encoder, | |
660 | enum pipe *pipe) | |
661 | { | |
662 | struct drm_i915_private *dev_priv = encoder->base.dev->dev_private; | |
c0beefd2 GS |
663 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); |
664 | struct drm_device *dev = encoder->base.dev; | |
6d129bea | 665 | enum intel_display_power_domain power_domain; |
e7d7cad0 | 666 | enum port port; |
4e646495 JN |
667 | |
668 | DRM_DEBUG_KMS("\n"); | |
669 | ||
6d129bea | 670 | power_domain = intel_display_port_power_domain(encoder); |
f458ebbc | 671 | if (!intel_display_power_is_enabled(dev_priv, power_domain)) |
6d129bea ID |
672 | return false; |
673 | ||
4e646495 | 674 | /* XXX: this only works for one DSI output */ |
c0beefd2 | 675 | for_each_dsi_port(port, intel_dsi->ports) { |
f0f59a00 VS |
676 | i915_reg_t ctrl_reg = IS_BROXTON(dev) ? |
677 | BXT_MIPI_PORT_CTRL(port) : MIPI_PORT_CTRL(port); | |
678 | u32 dpi_enabled, func; | |
679 | ||
e7d7cad0 | 680 | func = I915_READ(MIPI_DSI_FUNC_PRG(port)); |
baeac68a | 681 | dpi_enabled = I915_READ(ctrl_reg) & DPI_ENABLE; |
c0beefd2 GS |
682 | |
683 | /* Due to some hardware limitations on BYT, MIPI Port C DPI | |
684 | * Enable bit does not get set. To check whether DSI Port C | |
685 | * was enabled in BIOS, check the Pipe B enable bit | |
686 | */ | |
666a4537 | 687 | if (IS_VALLEYVIEW(dev) && port == PORT_C) |
c0beefd2 GS |
688 | dpi_enabled = I915_READ(PIPECONF(PIPE_B)) & |
689 | PIPECONF_ENABLE; | |
4e646495 | 690 | |
c0beefd2 | 691 | if (dpi_enabled || (func & CMD_MODE_DATA_WIDTH_MASK)) { |
e7d7cad0 | 692 | if (I915_READ(MIPI_DEVICE_READY(port)) & DEVICE_READY) { |
c0beefd2 | 693 | *pipe = port == PORT_A ? PIPE_A : PIPE_B; |
4e646495 JN |
694 | return true; |
695 | } | |
696 | } | |
697 | } | |
698 | ||
699 | return false; | |
700 | } | |
701 | ||
702 | static void intel_dsi_get_config(struct intel_encoder *encoder, | |
5cec258b | 703 | struct intel_crtc_state *pipe_config) |
4e646495 | 704 | { |
ce0c9821 | 705 | u32 pclk = 0; |
4e646495 JN |
706 | DRM_DEBUG_KMS("\n"); |
707 | ||
a65347ba JN |
708 | pipe_config->has_dsi_encoder = true; |
709 | ||
f573de5a SK |
710 | /* |
711 | * DPLL_MD is not used in case of DSI, reading will get some default value | |
712 | * set dpll_md = 0 | |
713 | */ | |
714 | pipe_config->dpll_hw_state.dpll_md = 0; | |
715 | ||
ce0c9821 SS |
716 | if (IS_BROXTON(encoder->base.dev)) |
717 | pclk = bxt_get_dsi_pclk(encoder, pipe_config->pipe_bpp); | |
666a4537 WB |
718 | else if (IS_VALLEYVIEW(encoder->base.dev) || |
719 | IS_CHERRYVIEW(encoder->base.dev)) | |
ce0c9821 SS |
720 | pclk = vlv_get_dsi_pclk(encoder, pipe_config->pipe_bpp); |
721 | ||
f573de5a SK |
722 | if (!pclk) |
723 | return; | |
724 | ||
2d112de7 | 725 | pipe_config->base.adjusted_mode.crtc_clock = pclk; |
f573de5a | 726 | pipe_config->port_clock = pclk; |
4e646495 JN |
727 | } |
728 | ||
c19de8eb DL |
729 | static enum drm_mode_status |
730 | intel_dsi_mode_valid(struct drm_connector *connector, | |
731 | struct drm_display_mode *mode) | |
4e646495 JN |
732 | { |
733 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
734 | struct drm_display_mode *fixed_mode = intel_connector->panel.fixed_mode; | |
759a1e98 | 735 | int max_dotclk = to_i915(connector->dev)->max_dotclk_freq; |
4e646495 JN |
736 | |
737 | DRM_DEBUG_KMS("\n"); | |
738 | ||
739 | if (mode->flags & DRM_MODE_FLAG_DBLSCAN) { | |
740 | DRM_DEBUG_KMS("MODE_NO_DBLESCAN\n"); | |
741 | return MODE_NO_DBLESCAN; | |
742 | } | |
743 | ||
744 | if (fixed_mode) { | |
745 | if (mode->hdisplay > fixed_mode->hdisplay) | |
746 | return MODE_PANEL; | |
747 | if (mode->vdisplay > fixed_mode->vdisplay) | |
748 | return MODE_PANEL; | |
759a1e98 MK |
749 | if (fixed_mode->clock > max_dotclk) |
750 | return MODE_CLOCK_HIGH; | |
4e646495 JN |
751 | } |
752 | ||
36d21f4c | 753 | return MODE_OK; |
4e646495 JN |
754 | } |
755 | ||
756 | /* return txclkesc cycles in terms of divider and duration in us */ | |
757 | static u16 txclkesc(u32 divider, unsigned int us) | |
758 | { | |
759 | switch (divider) { | |
760 | case ESCAPE_CLOCK_DIVIDER_1: | |
761 | default: | |
762 | return 20 * us; | |
763 | case ESCAPE_CLOCK_DIVIDER_2: | |
764 | return 10 * us; | |
765 | case ESCAPE_CLOCK_DIVIDER_4: | |
766 | return 5 * us; | |
767 | } | |
768 | } | |
769 | ||
770 | /* return pixels in terms of txbyteclkhs */ | |
7f0c8605 SK |
771 | static u16 txbyteclkhs(u16 pixels, int bpp, int lane_count, |
772 | u16 burst_mode_ratio) | |
4e646495 | 773 | { |
7f0c8605 | 774 | return DIV_ROUND_UP(DIV_ROUND_UP(pixels * bpp * burst_mode_ratio, |
7f3de833 | 775 | 8 * 100), lane_count); |
4e646495 JN |
776 | } |
777 | ||
778 | static void set_dsi_timings(struct drm_encoder *encoder, | |
5e7234c9 | 779 | const struct drm_display_mode *adjusted_mode) |
4e646495 JN |
780 | { |
781 | struct drm_device *dev = encoder->dev; | |
782 | struct drm_i915_private *dev_priv = dev->dev_private; | |
783 | struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc); | |
784 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); | |
aa102d28 | 785 | enum port port; |
6e3c9717 | 786 | unsigned int bpp = intel_crtc->config->pipe_bpp; |
4e646495 JN |
787 | unsigned int lane_count = intel_dsi->lane_count; |
788 | ||
789 | u16 hactive, hfp, hsync, hbp, vfp, vsync, vbp; | |
790 | ||
aad941d5 VS |
791 | hactive = adjusted_mode->crtc_hdisplay; |
792 | hfp = adjusted_mode->crtc_hsync_start - adjusted_mode->crtc_hdisplay; | |
793 | hsync = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start; | |
794 | hbp = adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end; | |
4e646495 | 795 | |
aa102d28 GS |
796 | if (intel_dsi->dual_link) { |
797 | hactive /= 2; | |
798 | if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) | |
799 | hactive += intel_dsi->pixel_overlap; | |
800 | hfp /= 2; | |
801 | hsync /= 2; | |
802 | hbp /= 2; | |
803 | } | |
804 | ||
aad941d5 VS |
805 | vfp = adjusted_mode->crtc_vsync_start - adjusted_mode->crtc_vdisplay; |
806 | vsync = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start; | |
807 | vbp = adjusted_mode->crtc_vtotal - adjusted_mode->crtc_vsync_end; | |
4e646495 JN |
808 | |
809 | /* horizontal values are in terms of high speed byte clock */ | |
7f0c8605 | 810 | hactive = txbyteclkhs(hactive, bpp, lane_count, |
7f3de833 | 811 | intel_dsi->burst_mode_ratio); |
7f0c8605 SK |
812 | hfp = txbyteclkhs(hfp, bpp, lane_count, intel_dsi->burst_mode_ratio); |
813 | hsync = txbyteclkhs(hsync, bpp, lane_count, | |
7f3de833 | 814 | intel_dsi->burst_mode_ratio); |
7f0c8605 | 815 | hbp = txbyteclkhs(hbp, bpp, lane_count, intel_dsi->burst_mode_ratio); |
4e646495 | 816 | |
aa102d28 | 817 | for_each_dsi_port(port, intel_dsi->ports) { |
d2e08c0f SS |
818 | if (IS_BROXTON(dev)) { |
819 | /* | |
820 | * Program hdisplay and vdisplay on MIPI transcoder. | |
821 | * This is different from calculated hactive and | |
822 | * vactive, as they are calculated per channel basis, | |
823 | * whereas these values should be based on resolution. | |
824 | */ | |
825 | I915_WRITE(BXT_MIPI_TRANS_HACTIVE(port), | |
aad941d5 | 826 | adjusted_mode->crtc_hdisplay); |
d2e08c0f | 827 | I915_WRITE(BXT_MIPI_TRANS_VACTIVE(port), |
aad941d5 | 828 | adjusted_mode->crtc_vdisplay); |
d2e08c0f | 829 | I915_WRITE(BXT_MIPI_TRANS_VTOTAL(port), |
aad941d5 | 830 | adjusted_mode->crtc_vtotal); |
d2e08c0f SS |
831 | } |
832 | ||
aa102d28 GS |
833 | I915_WRITE(MIPI_HACTIVE_AREA_COUNT(port), hactive); |
834 | I915_WRITE(MIPI_HFP_COUNT(port), hfp); | |
835 | ||
836 | /* meaningful for video mode non-burst sync pulse mode only, | |
837 | * can be zero for non-burst sync events and burst modes */ | |
838 | I915_WRITE(MIPI_HSYNC_PADDING_COUNT(port), hsync); | |
839 | I915_WRITE(MIPI_HBP_COUNT(port), hbp); | |
840 | ||
841 | /* vertical values are in terms of lines */ | |
842 | I915_WRITE(MIPI_VFP_COUNT(port), vfp); | |
843 | I915_WRITE(MIPI_VSYNC_PADDING_COUNT(port), vsync); | |
844 | I915_WRITE(MIPI_VBP_COUNT(port), vbp); | |
845 | } | |
4e646495 JN |
846 | } |
847 | ||
07e4fb9e | 848 | static void intel_dsi_prepare(struct intel_encoder *intel_encoder) |
4e646495 JN |
849 | { |
850 | struct drm_encoder *encoder = &intel_encoder->base; | |
851 | struct drm_device *dev = encoder->dev; | |
852 | struct drm_i915_private *dev_priv = dev->dev_private; | |
853 | struct intel_crtc *intel_crtc = to_intel_crtc(encoder->crtc); | |
854 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); | |
7c5f93b0 | 855 | const struct drm_display_mode *adjusted_mode = &intel_crtc->config->base.adjusted_mode; |
24ee0e64 | 856 | enum port port; |
6e3c9717 | 857 | unsigned int bpp = intel_crtc->config->pipe_bpp; |
4e646495 | 858 | u32 val, tmp; |
24ee0e64 | 859 | u16 mode_hdisplay; |
4e646495 | 860 | |
e7d7cad0 | 861 | DRM_DEBUG_KMS("pipe %c\n", pipe_name(intel_crtc->pipe)); |
4e646495 | 862 | |
aad941d5 | 863 | mode_hdisplay = adjusted_mode->crtc_hdisplay; |
4e646495 | 864 | |
24ee0e64 GS |
865 | if (intel_dsi->dual_link) { |
866 | mode_hdisplay /= 2; | |
867 | if (intel_dsi->dual_link == DSI_DUAL_LINK_FRONT_BACK) | |
868 | mode_hdisplay += intel_dsi->pixel_overlap; | |
869 | } | |
4e646495 | 870 | |
24ee0e64 | 871 | for_each_dsi_port(port, intel_dsi->ports) { |
666a4537 | 872 | if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) { |
d2e08c0f SS |
873 | /* |
874 | * escape clock divider, 20MHz, shared for A and C. | |
875 | * device ready must be off when doing this! txclkesc? | |
876 | */ | |
877 | tmp = I915_READ(MIPI_CTRL(PORT_A)); | |
878 | tmp &= ~ESCAPE_CLOCK_DIVIDER_MASK; | |
879 | I915_WRITE(MIPI_CTRL(PORT_A), tmp | | |
880 | ESCAPE_CLOCK_DIVIDER_1); | |
881 | ||
882 | /* read request priority is per pipe */ | |
883 | tmp = I915_READ(MIPI_CTRL(port)); | |
884 | tmp &= ~READ_REQUEST_PRIORITY_MASK; | |
885 | I915_WRITE(MIPI_CTRL(port), tmp | | |
886 | READ_REQUEST_PRIORITY_HIGH); | |
887 | } else if (IS_BROXTON(dev)) { | |
888 | /* | |
889 | * FIXME: | |
890 | * BXT can connect any PIPE to any MIPI port. | |
891 | * Select the pipe based on the MIPI port read from | |
892 | * VBT for now. Pick PIPE A for MIPI port A and C | |
893 | * for port C. | |
894 | */ | |
895 | tmp = I915_READ(MIPI_CTRL(port)); | |
896 | tmp &= ~BXT_PIPE_SELECT_MASK; | |
897 | ||
898 | if (port == PORT_A) | |
899 | tmp |= BXT_PIPE_SELECT_A; | |
900 | else if (port == PORT_C) | |
901 | tmp |= BXT_PIPE_SELECT_C; | |
902 | ||
903 | I915_WRITE(MIPI_CTRL(port), tmp); | |
904 | } | |
24ee0e64 GS |
905 | |
906 | /* XXX: why here, why like this? handling in irq handler?! */ | |
907 | I915_WRITE(MIPI_INTR_STAT(port), 0xffffffff); | |
908 | I915_WRITE(MIPI_INTR_EN(port), 0xffffffff); | |
909 | ||
910 | I915_WRITE(MIPI_DPHY_PARAM(port), intel_dsi->dphy_reg); | |
911 | ||
912 | I915_WRITE(MIPI_DPI_RESOLUTION(port), | |
aad941d5 | 913 | adjusted_mode->crtc_vdisplay << VERTICAL_ADDRESS_SHIFT | |
24ee0e64 GS |
914 | mode_hdisplay << HORIZONTAL_ADDRESS_SHIFT); |
915 | } | |
4e646495 JN |
916 | |
917 | set_dsi_timings(encoder, adjusted_mode); | |
918 | ||
919 | val = intel_dsi->lane_count << DATA_LANES_PRG_REG_SHIFT; | |
920 | if (is_cmd_mode(intel_dsi)) { | |
921 | val |= intel_dsi->channel << CMD_MODE_CHANNEL_NUMBER_SHIFT; | |
922 | val |= CMD_MODE_DATA_WIDTH_8_BIT; /* XXX */ | |
923 | } else { | |
924 | val |= intel_dsi->channel << VID_MODE_CHANNEL_NUMBER_SHIFT; | |
925 | ||
926 | /* XXX: cross-check bpp vs. pixel format? */ | |
927 | val |= intel_dsi->pixel_format; | |
928 | } | |
4e646495 | 929 | |
24ee0e64 GS |
930 | tmp = 0; |
931 | if (intel_dsi->eotp_pkt == 0) | |
932 | tmp |= EOT_DISABLE; | |
933 | if (intel_dsi->clock_stop) | |
934 | tmp |= CLOCKSTOP; | |
4e646495 | 935 | |
24ee0e64 GS |
936 | for_each_dsi_port(port, intel_dsi->ports) { |
937 | I915_WRITE(MIPI_DSI_FUNC_PRG(port), val); | |
938 | ||
939 | /* timeouts for recovery. one frame IIUC. if counter expires, | |
940 | * EOT and stop state. */ | |
941 | ||
942 | /* | |
943 | * In burst mode, value greater than one DPI line Time in byte | |
944 | * clock (txbyteclkhs) To timeout this timer 1+ of the above | |
945 | * said value is recommended. | |
946 | * | |
947 | * In non-burst mode, Value greater than one DPI frame time in | |
948 | * byte clock(txbyteclkhs) To timeout this timer 1+ of the above | |
949 | * said value is recommended. | |
950 | * | |
951 | * In DBI only mode, value greater than one DBI frame time in | |
952 | * byte clock(txbyteclkhs) To timeout this timer 1+ of the above | |
953 | * said value is recommended. | |
954 | */ | |
4e646495 | 955 | |
24ee0e64 GS |
956 | if (is_vid_mode(intel_dsi) && |
957 | intel_dsi->video_mode_format == VIDEO_MODE_BURST) { | |
958 | I915_WRITE(MIPI_HS_TX_TIMEOUT(port), | |
aad941d5 | 959 | txbyteclkhs(adjusted_mode->crtc_htotal, bpp, |
124abe07 VS |
960 | intel_dsi->lane_count, |
961 | intel_dsi->burst_mode_ratio) + 1); | |
24ee0e64 GS |
962 | } else { |
963 | I915_WRITE(MIPI_HS_TX_TIMEOUT(port), | |
aad941d5 VS |
964 | txbyteclkhs(adjusted_mode->crtc_vtotal * |
965 | adjusted_mode->crtc_htotal, | |
124abe07 VS |
966 | bpp, intel_dsi->lane_count, |
967 | intel_dsi->burst_mode_ratio) + 1); | |
24ee0e64 GS |
968 | } |
969 | I915_WRITE(MIPI_LP_RX_TIMEOUT(port), intel_dsi->lp_rx_timeout); | |
970 | I915_WRITE(MIPI_TURN_AROUND_TIMEOUT(port), | |
971 | intel_dsi->turn_arnd_val); | |
972 | I915_WRITE(MIPI_DEVICE_RESET_TIMER(port), | |
973 | intel_dsi->rst_timer_val); | |
f1c79f16 | 974 | |
24ee0e64 | 975 | /* dphy stuff */ |
f1c79f16 | 976 | |
24ee0e64 GS |
977 | /* in terms of low power clock */ |
978 | I915_WRITE(MIPI_INIT_COUNT(port), | |
979 | txclkesc(intel_dsi->escape_clk_div, 100)); | |
4e646495 | 980 | |
d2e08c0f SS |
981 | if (IS_BROXTON(dev) && (!intel_dsi->dual_link)) { |
982 | /* | |
983 | * BXT spec says write MIPI_INIT_COUNT for | |
984 | * both the ports, even if only one is | |
985 | * getting used. So write the other port | |
986 | * if not in dual link mode. | |
987 | */ | |
988 | I915_WRITE(MIPI_INIT_COUNT(port == | |
989 | PORT_A ? PORT_C : PORT_A), | |
990 | intel_dsi->init_count); | |
991 | } | |
4e646495 | 992 | |
24ee0e64 | 993 | /* recovery disables */ |
87c54d0e | 994 | I915_WRITE(MIPI_EOT_DISABLE(port), tmp); |
cf4dbd2e | 995 | |
24ee0e64 GS |
996 | /* in terms of low power clock */ |
997 | I915_WRITE(MIPI_INIT_COUNT(port), intel_dsi->init_count); | |
4e646495 | 998 | |
24ee0e64 GS |
999 | /* in terms of txbyteclkhs. actual high to low switch + |
1000 | * MIPI_STOP_STATE_STALL * MIPI_LP_BYTECLK. | |
1001 | * | |
1002 | * XXX: write MIPI_STOP_STATE_STALL? | |
1003 | */ | |
1004 | I915_WRITE(MIPI_HIGH_LOW_SWITCH_COUNT(port), | |
1005 | intel_dsi->hs_to_lp_count); | |
1006 | ||
1007 | /* XXX: low power clock equivalence in terms of byte clock. | |
1008 | * the number of byte clocks occupied in one low power clock. | |
1009 | * based on txbyteclkhs and txclkesc. | |
1010 | * txclkesc time / txbyteclk time * (105 + MIPI_STOP_STATE_STALL | |
1011 | * ) / 105.??? | |
1012 | */ | |
1013 | I915_WRITE(MIPI_LP_BYTECLK(port), intel_dsi->lp_byte_clk); | |
1014 | ||
1015 | /* the bw essential for transmitting 16 long packets containing | |
1016 | * 252 bytes meant for dcs write memory command is programmed in | |
1017 | * this register in terms of byte clocks. based on dsi transfer | |
1018 | * rate and the number of lanes configured the time taken to | |
1019 | * transmit 16 long packets in a dsi stream varies. */ | |
1020 | I915_WRITE(MIPI_DBI_BW_CTRL(port), intel_dsi->bw_timer); | |
1021 | ||
1022 | I915_WRITE(MIPI_CLK_LANE_SWITCH_TIME_CNT(port), | |
1023 | intel_dsi->clk_lp_to_hs_count << LP_HS_SSW_CNT_SHIFT | | |
1024 | intel_dsi->clk_hs_to_lp_count << HS_LP_PWR_SW_CNT_SHIFT); | |
1025 | ||
1026 | if (is_vid_mode(intel_dsi)) | |
1027 | /* Some panels might have resolution which is not a | |
1028 | * multiple of 64 like 1366 x 768. Enable RANDOM | |
1029 | * resolution support for such panels by default */ | |
1030 | I915_WRITE(MIPI_VIDEO_MODE_FORMAT(port), | |
1031 | intel_dsi->video_frmt_cfg_bits | | |
1032 | intel_dsi->video_mode_format | | |
1033 | IP_TG_CONFIG | | |
1034 | RANDOM_DPI_DISPLAY_RESOLUTION); | |
1035 | } | |
4e646495 JN |
1036 | } |
1037 | ||
1038 | static enum drm_connector_status | |
1039 | intel_dsi_detect(struct drm_connector *connector, bool force) | |
1040 | { | |
36d21f4c | 1041 | return connector_status_connected; |
4e646495 JN |
1042 | } |
1043 | ||
1044 | static int intel_dsi_get_modes(struct drm_connector *connector) | |
1045 | { | |
1046 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
1047 | struct drm_display_mode *mode; | |
1048 | ||
1049 | DRM_DEBUG_KMS("\n"); | |
1050 | ||
1051 | if (!intel_connector->panel.fixed_mode) { | |
1052 | DRM_DEBUG_KMS("no fixed mode\n"); | |
1053 | return 0; | |
1054 | } | |
1055 | ||
1056 | mode = drm_mode_duplicate(connector->dev, | |
1057 | intel_connector->panel.fixed_mode); | |
1058 | if (!mode) { | |
1059 | DRM_DEBUG_KMS("drm_mode_duplicate failed\n"); | |
1060 | return 0; | |
1061 | } | |
1062 | ||
1063 | drm_mode_probed_add(connector, mode); | |
1064 | return 1; | |
1065 | } | |
1066 | ||
593e0622 | 1067 | static void intel_dsi_connector_destroy(struct drm_connector *connector) |
4e646495 JN |
1068 | { |
1069 | struct intel_connector *intel_connector = to_intel_connector(connector); | |
1070 | ||
1071 | DRM_DEBUG_KMS("\n"); | |
1072 | intel_panel_fini(&intel_connector->panel); | |
4e646495 JN |
1073 | drm_connector_cleanup(connector); |
1074 | kfree(connector); | |
1075 | } | |
1076 | ||
593e0622 JN |
1077 | static void intel_dsi_encoder_destroy(struct drm_encoder *encoder) |
1078 | { | |
1079 | struct intel_dsi *intel_dsi = enc_to_intel_dsi(encoder); | |
1080 | ||
1081 | if (intel_dsi->panel) { | |
1082 | drm_panel_detach(intel_dsi->panel); | |
1083 | /* XXX: Logically this call belongs in the panel driver. */ | |
1084 | drm_panel_remove(intel_dsi->panel); | |
1085 | } | |
fc45e821 SK |
1086 | |
1087 | /* dispose of the gpios */ | |
1088 | if (intel_dsi->gpio_panel) | |
1089 | gpiod_put(intel_dsi->gpio_panel); | |
1090 | ||
593e0622 JN |
1091 | intel_encoder_destroy(encoder); |
1092 | } | |
1093 | ||
4e646495 | 1094 | static const struct drm_encoder_funcs intel_dsi_funcs = { |
593e0622 | 1095 | .destroy = intel_dsi_encoder_destroy, |
4e646495 JN |
1096 | }; |
1097 | ||
1098 | static const struct drm_connector_helper_funcs intel_dsi_connector_helper_funcs = { | |
1099 | .get_modes = intel_dsi_get_modes, | |
1100 | .mode_valid = intel_dsi_mode_valid, | |
1101 | .best_encoder = intel_best_encoder, | |
1102 | }; | |
1103 | ||
1104 | static const struct drm_connector_funcs intel_dsi_connector_funcs = { | |
4d688a2a | 1105 | .dpms = drm_atomic_helper_connector_dpms, |
4e646495 | 1106 | .detect = intel_dsi_detect, |
593e0622 | 1107 | .destroy = intel_dsi_connector_destroy, |
4e646495 | 1108 | .fill_modes = drm_helper_probe_single_connector_modes, |
2545e4a6 | 1109 | .atomic_get_property = intel_connector_atomic_get_property, |
c6f95f27 | 1110 | .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, |
98969725 | 1111 | .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, |
4e646495 JN |
1112 | }; |
1113 | ||
4328633d | 1114 | void intel_dsi_init(struct drm_device *dev) |
4e646495 JN |
1115 | { |
1116 | struct intel_dsi *intel_dsi; | |
1117 | struct intel_encoder *intel_encoder; | |
1118 | struct drm_encoder *encoder; | |
1119 | struct intel_connector *intel_connector; | |
1120 | struct drm_connector *connector; | |
593e0622 | 1121 | struct drm_display_mode *scan, *fixed_mode = NULL; |
b6fdd0f2 | 1122 | struct drm_i915_private *dev_priv = dev->dev_private; |
7e9804fd | 1123 | enum port port; |
4e646495 JN |
1124 | unsigned int i; |
1125 | ||
1126 | DRM_DEBUG_KMS("\n"); | |
1127 | ||
3e6bd011 SK |
1128 | /* There is no detection method for MIPI so rely on VBT */ |
1129 | if (!dev_priv->vbt.has_mipi) | |
4328633d | 1130 | return; |
3e6bd011 | 1131 | |
666a4537 | 1132 | if (IS_VALLEYVIEW(dev) || IS_CHERRYVIEW(dev)) { |
868d665b CJ |
1133 | dev_priv->mipi_mmio_base = VLV_MIPI_BASE; |
1134 | } else { | |
1135 | DRM_ERROR("Unsupported Mipi device to reg base"); | |
1136 | return; | |
1137 | } | |
3e6bd011 | 1138 | |
4e646495 JN |
1139 | intel_dsi = kzalloc(sizeof(*intel_dsi), GFP_KERNEL); |
1140 | if (!intel_dsi) | |
4328633d | 1141 | return; |
4e646495 | 1142 | |
08d9bc92 | 1143 | intel_connector = intel_connector_alloc(); |
4e646495 JN |
1144 | if (!intel_connector) { |
1145 | kfree(intel_dsi); | |
4328633d | 1146 | return; |
4e646495 JN |
1147 | } |
1148 | ||
1149 | intel_encoder = &intel_dsi->base; | |
1150 | encoder = &intel_encoder->base; | |
1151 | intel_dsi->attached_connector = intel_connector; | |
1152 | ||
1153 | connector = &intel_connector->base; | |
1154 | ||
1155 | drm_encoder_init(dev, encoder, &intel_dsi_funcs, DRM_MODE_ENCODER_DSI); | |
1156 | ||
4e646495 | 1157 | intel_encoder->compute_config = intel_dsi_compute_config; |
4e646495 | 1158 | intel_encoder->pre_enable = intel_dsi_pre_enable; |
2634fd7f | 1159 | intel_encoder->enable = intel_dsi_enable_nop; |
c315faf8 | 1160 | intel_encoder->disable = intel_dsi_pre_disable; |
4e646495 JN |
1161 | intel_encoder->post_disable = intel_dsi_post_disable; |
1162 | intel_encoder->get_hw_state = intel_dsi_get_hw_state; | |
1163 | intel_encoder->get_config = intel_dsi_get_config; | |
1164 | ||
1165 | intel_connector->get_hw_state = intel_connector_get_hw_state; | |
4932e2c3 | 1166 | intel_connector->unregister = intel_connector_unregister; |
4e646495 | 1167 | |
e7d7cad0 | 1168 | /* Pipe A maps to MIPI DSI port A, pipe B maps to MIPI DSI port C */ |
82425785 | 1169 | if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIA) { |
e7d7cad0 | 1170 | intel_encoder->crtc_mask = (1 << PIPE_A); |
17af40a8 JN |
1171 | intel_dsi->ports = (1 << PORT_A); |
1172 | } else if (dev_priv->vbt.dsi.port == DVO_PORT_MIPIC) { | |
e7d7cad0 | 1173 | intel_encoder->crtc_mask = (1 << PIPE_B); |
17af40a8 JN |
1174 | intel_dsi->ports = (1 << PORT_C); |
1175 | } | |
e7d7cad0 | 1176 | |
82425785 GS |
1177 | if (dev_priv->vbt.dsi.config->dual_link) |
1178 | intel_dsi->ports = ((1 << PORT_A) | (1 << PORT_C)); | |
1179 | ||
7e9804fd JN |
1180 | /* Create a DSI host (and a device) for each port. */ |
1181 | for_each_dsi_port(port, intel_dsi->ports) { | |
1182 | struct intel_dsi_host *host; | |
1183 | ||
1184 | host = intel_dsi_host_init(intel_dsi, port); | |
1185 | if (!host) | |
1186 | goto err; | |
1187 | ||
1188 | intel_dsi->dsi_hosts[port] = host; | |
1189 | } | |
1190 | ||
593e0622 JN |
1191 | for (i = 0; i < ARRAY_SIZE(intel_dsi_drivers); i++) { |
1192 | intel_dsi->panel = intel_dsi_drivers[i].init(intel_dsi, | |
1193 | intel_dsi_drivers[i].panel_id); | |
1194 | if (intel_dsi->panel) | |
4e646495 JN |
1195 | break; |
1196 | } | |
1197 | ||
593e0622 | 1198 | if (!intel_dsi->panel) { |
4e646495 JN |
1199 | DRM_DEBUG_KMS("no device found\n"); |
1200 | goto err; | |
1201 | } | |
1202 | ||
fc45e821 SK |
1203 | /* |
1204 | * In case of BYT with CRC PMIC, we need to use GPIO for | |
1205 | * Panel control. | |
1206 | */ | |
1207 | if (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC) { | |
1208 | intel_dsi->gpio_panel = | |
1209 | gpiod_get(dev->dev, "panel", GPIOD_OUT_HIGH); | |
1210 | ||
1211 | if (IS_ERR(intel_dsi->gpio_panel)) { | |
1212 | DRM_ERROR("Failed to own gpio for panel control\n"); | |
1213 | intel_dsi->gpio_panel = NULL; | |
1214 | } | |
1215 | } | |
1216 | ||
4e646495 | 1217 | intel_encoder->type = INTEL_OUTPUT_DSI; |
bc079e8b | 1218 | intel_encoder->cloneable = 0; |
4e646495 JN |
1219 | drm_connector_init(dev, connector, &intel_dsi_connector_funcs, |
1220 | DRM_MODE_CONNECTOR_DSI); | |
1221 | ||
1222 | drm_connector_helper_add(connector, &intel_dsi_connector_helper_funcs); | |
1223 | ||
1224 | connector->display_info.subpixel_order = SubPixelHorizontalRGB; /*XXX*/ | |
1225 | connector->interlace_allowed = false; | |
1226 | connector->doublescan_allowed = false; | |
1227 | ||
1228 | intel_connector_attach_encoder(intel_connector, intel_encoder); | |
1229 | ||
34ea3d38 | 1230 | drm_connector_register(connector); |
4e646495 | 1231 | |
593e0622 JN |
1232 | drm_panel_attach(intel_dsi->panel, connector); |
1233 | ||
1234 | mutex_lock(&dev->mode_config.mutex); | |
1235 | drm_panel_get_modes(intel_dsi->panel); | |
1236 | list_for_each_entry(scan, &connector->probed_modes, head) { | |
1237 | if ((scan->type & DRM_MODE_TYPE_PREFERRED)) { | |
1238 | fixed_mode = drm_mode_duplicate(dev, scan); | |
1239 | break; | |
1240 | } | |
1241 | } | |
1242 | mutex_unlock(&dev->mode_config.mutex); | |
1243 | ||
4e646495 JN |
1244 | if (!fixed_mode) { |
1245 | DRM_DEBUG_KMS("no fixed mode\n"); | |
1246 | goto err; | |
1247 | } | |
1248 | ||
4b6ed685 | 1249 | intel_panel_init(&intel_connector->panel, fixed_mode, NULL); |
b029e66f | 1250 | intel_panel_setup_backlight(connector, INVALID_PIPE); |
4e646495 | 1251 | |
4328633d | 1252 | return; |
4e646495 JN |
1253 | |
1254 | err: | |
1255 | drm_encoder_cleanup(&intel_encoder->base); | |
1256 | kfree(intel_dsi); | |
1257 | kfree(intel_connector); | |
4e646495 | 1258 | } |