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1/*
2 * Copyright (c) 2015, The Linux Foundation. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License version 2 and
6 * only version 2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#include <linux/clk.h>
15#include <linux/delay.h>
16#include <linux/err.h>
17#include <linux/gpio.h>
18#include <linux/gpio/consumer.h>
19#include <linux/interrupt.h>
20#include <linux/of_device.h>
21#include <linux/of_gpio.h>
22#include <linux/of_irq.h>
23#include <linux/pinctrl/consumer.h>
24#include <linux/of_graph.h>
25#include <linux/regulator/consumer.h>
26#include <linux/spinlock.h>
27#include <linux/mfd/syscon.h>
28#include <linux/regmap.h>
29#include <video/mipi_display.h>
30
31#include "dsi.h"
32#include "dsi.xml.h"
33#include "sfpb.xml.h"
34#include "dsi_cfg.h"
35
36static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor)
37{
38 u32 ver;
39
40 if (!major || !minor)
41 return -EINVAL;
42
43 /*
44 * From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0
45 * makes all other registers 4-byte shifted down.
46 *
47 * In order to identify between DSI6G(v3) and beyond, and DSIv2 and
48 * older, we read the DSI_VERSION register without any shift(offset
49 * 0x1f0). In the case of DSIv2, this hast to be a non-zero value. In
50 * the case of DSI6G, this has to be zero (the offset points to a
51 * scratch register which we never touch)
52 */
53
54 ver = msm_readl(base + REG_DSI_VERSION);
55 if (ver) {
56 /* older dsi host, there is no register shift */
57 ver = FIELD(ver, DSI_VERSION_MAJOR);
58 if (ver <= MSM_DSI_VER_MAJOR_V2) {
59 /* old versions */
60 *major = ver;
61 *minor = 0;
62 return 0;
63 } else {
64 return -EINVAL;
65 }
66 } else {
67 /*
68 * newer host, offset 0 has 6G_HW_VERSION, the rest of the
69 * registers are shifted down, read DSI_VERSION again with
70 * the shifted offset
71 */
72 ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION);
73 ver = FIELD(ver, DSI_VERSION_MAJOR);
74 if (ver == MSM_DSI_VER_MAJOR_6G) {
75 /* 6G version */
76 *major = ver;
77 *minor = msm_readl(base + REG_DSI_6G_HW_VERSION);
78 return 0;
79 } else {
80 return -EINVAL;
81 }
82 }
83}
84
85#define DSI_ERR_STATE_ACK 0x0000
86#define DSI_ERR_STATE_TIMEOUT 0x0001
87#define DSI_ERR_STATE_DLN0_PHY 0x0002
88#define DSI_ERR_STATE_FIFO 0x0004
89#define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW 0x0008
90#define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010
91#define DSI_ERR_STATE_PLL_UNLOCKED 0x0020
92
93#define DSI_CLK_CTRL_ENABLE_CLKS \
94 (DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \
95 DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \
96 DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \
97 DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK)
98
99struct msm_dsi_host {
100 struct mipi_dsi_host base;
101
102 struct platform_device *pdev;
103 struct drm_device *dev;
104
105 int id;
106
107 void __iomem *ctrl_base;
108 struct regulator_bulk_data supplies[DSI_DEV_REGULATOR_MAX];
109
110 struct clk *bus_clks[DSI_BUS_CLK_MAX];
111
112 struct clk *byte_clk;
113 struct clk *esc_clk;
114 struct clk *pixel_clk;
115 struct clk *byte_clk_src;
116 struct clk *pixel_clk_src;
117
118 u32 byte_clk_rate;
119 u32 esc_clk_rate;
120
121 /* DSI v2 specific clocks */
122 struct clk *src_clk;
123 struct clk *esc_clk_src;
124 struct clk *dsi_clk_src;
125
126 u32 src_clk_rate;
127
128 struct gpio_desc *disp_en_gpio;
129 struct gpio_desc *te_gpio;
130
131 const struct msm_dsi_cfg_handler *cfg_hnd;
132
133 struct completion dma_comp;
134 struct completion video_comp;
135 struct mutex dev_mutex;
136 struct mutex cmd_mutex;
137 struct mutex clk_mutex;
138 spinlock_t intr_lock; /* Protect interrupt ctrl register */
139
140 u32 err_work_state;
141 struct work_struct err_work;
142 struct workqueue_struct *workqueue;
143
144 /* DSI 6G TX buffer*/
145 struct drm_gem_object *tx_gem_obj;
146
147 /* DSI v2 TX buffer */
148 void *tx_buf;
149 dma_addr_t tx_buf_paddr;
150
151 int tx_size;
152
153 u8 *rx_buf;
154
155 struct regmap *sfpb;
156
157 struct drm_display_mode *mode;
158
159 /* connected device info */
160 struct device_node *device_node;
161 unsigned int channel;
162 unsigned int lanes;
163 enum mipi_dsi_pixel_format format;
164 unsigned long mode_flags;
165
166 /* lane data parsed via DT */
167 int dlane_swap;
168 int num_data_lanes;
169
170 u32 dma_cmd_ctrl_restore;
171
172 bool registered;
173 bool power_on;
174 int irq;
175};
176
177static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt)
178{
179 switch (fmt) {
180 case MIPI_DSI_FMT_RGB565: return 16;
181 case MIPI_DSI_FMT_RGB666_PACKED: return 18;
182 case MIPI_DSI_FMT_RGB666:
183 case MIPI_DSI_FMT_RGB888:
184 default: return 24;
185 }
186}
187
188static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg)
189{
190 return msm_readl(msm_host->ctrl_base + reg);
191}
192static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data)
193{
194 msm_writel(data, msm_host->ctrl_base + reg);
195}
196
197static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host);
198static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host);
199
200static const struct msm_dsi_cfg_handler *dsi_get_config(
201 struct msm_dsi_host *msm_host)
202{
203 const struct msm_dsi_cfg_handler *cfg_hnd = NULL;
204 struct device *dev = &msm_host->pdev->dev;
205 struct regulator *gdsc_reg;
206 struct clk *ahb_clk;
207 int ret;
208 u32 major = 0, minor = 0;
209
210 gdsc_reg = regulator_get(dev, "gdsc");
211 if (IS_ERR(gdsc_reg)) {
212 pr_err("%s: cannot get gdsc\n", __func__);
213 goto exit;
214 }
215
216 ahb_clk = clk_get(dev, "iface_clk");
217 if (IS_ERR(ahb_clk)) {
218 pr_err("%s: cannot get interface clock\n", __func__);
219 goto put_gdsc;
220 }
221
222 ret = regulator_enable(gdsc_reg);
223 if (ret) {
224 pr_err("%s: unable to enable gdsc\n", __func__);
225 goto put_clk;
226 }
227
228 ret = clk_prepare_enable(ahb_clk);
229 if (ret) {
230 pr_err("%s: unable to enable ahb_clk\n", __func__);
231 goto disable_gdsc;
232 }
233
234 ret = dsi_get_version(msm_host->ctrl_base, &major, &minor);
235 if (ret) {
236 pr_err("%s: Invalid version\n", __func__);
237 goto disable_clks;
238 }
239
240 cfg_hnd = msm_dsi_cfg_get(major, minor);
241
242 DBG("%s: Version %x:%x\n", __func__, major, minor);
243
244disable_clks:
245 clk_disable_unprepare(ahb_clk);
246disable_gdsc:
247 regulator_disable(gdsc_reg);
248put_clk:
249 clk_put(ahb_clk);
250put_gdsc:
251 regulator_put(gdsc_reg);
252exit:
253 return cfg_hnd;
254}
255
256static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host)
257{
258 return container_of(host, struct msm_dsi_host, base);
259}
260
261static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host)
262{
263 struct regulator_bulk_data *s = msm_host->supplies;
264 const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
265 int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
266 int i;
267
268 DBG("");
269 for (i = num - 1; i >= 0; i--)
270 if (regs[i].disable_load >= 0)
271 regulator_set_load(s[i].consumer,
272 regs[i].disable_load);
273
274 regulator_bulk_disable(num, s);
275}
276
277static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host)
278{
279 struct regulator_bulk_data *s = msm_host->supplies;
280 const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
281 int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
282 int ret, i;
283
284 DBG("");
285 for (i = 0; i < num; i++) {
286 if (regs[i].enable_load >= 0) {
287 ret = regulator_set_load(s[i].consumer,
288 regs[i].enable_load);
289 if (ret < 0) {
290 pr_err("regulator %d set op mode failed, %d\n",
291 i, ret);
292 goto fail;
293 }
294 }
295 }
296
297 ret = regulator_bulk_enable(num, s);
298 if (ret < 0) {
299 pr_err("regulator enable failed, %d\n", ret);
300 goto fail;
301 }
302
303 return 0;
304
305fail:
306 for (i--; i >= 0; i--)
307 regulator_set_load(s[i].consumer, regs[i].disable_load);
308 return ret;
309}
310
311static int dsi_regulator_init(struct msm_dsi_host *msm_host)
312{
313 struct regulator_bulk_data *s = msm_host->supplies;
314 const struct dsi_reg_entry *regs = msm_host->cfg_hnd->cfg->reg_cfg.regs;
315 int num = msm_host->cfg_hnd->cfg->reg_cfg.num;
316 int i, ret;
317
318 for (i = 0; i < num; i++)
319 s[i].supply = regs[i].name;
320
321 ret = devm_regulator_bulk_get(&msm_host->pdev->dev, num, s);
322 if (ret < 0) {
323 pr_err("%s: failed to init regulator, ret=%d\n",
324 __func__, ret);
325 return ret;
326 }
327
328 for (i = 0; i < num; i++) {
329 if (regulator_can_change_voltage(s[i].consumer)) {
330 ret = regulator_set_voltage(s[i].consumer,
331 regs[i].min_voltage, regs[i].max_voltage);
332 if (ret < 0) {
333 pr_err("regulator %d set voltage failed, %d\n",
334 i, ret);
335 return ret;
336 }
337 }
338 }
339
340 return 0;
341}
342
343static int dsi_clk_init(struct msm_dsi_host *msm_host)
344{
345 struct device *dev = &msm_host->pdev->dev;
346 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
347 const struct msm_dsi_config *cfg = cfg_hnd->cfg;
348 int i, ret = 0;
349
350 /* get bus clocks */
351 for (i = 0; i < cfg->num_bus_clks; i++) {
352 msm_host->bus_clks[i] = devm_clk_get(dev,
353 cfg->bus_clk_names[i]);
354 if (IS_ERR(msm_host->bus_clks[i])) {
355 ret = PTR_ERR(msm_host->bus_clks[i]);
356 pr_err("%s: Unable to get %s, ret = %d\n",
357 __func__, cfg->bus_clk_names[i], ret);
358 goto exit;
359 }
360 }
361
362 /* get link and source clocks */
363 msm_host->byte_clk = devm_clk_get(dev, "byte_clk");
364 if (IS_ERR(msm_host->byte_clk)) {
365 ret = PTR_ERR(msm_host->byte_clk);
366 pr_err("%s: can't find dsi_byte_clk. ret=%d\n",
367 __func__, ret);
368 msm_host->byte_clk = NULL;
369 goto exit;
370 }
371
372 msm_host->pixel_clk = devm_clk_get(dev, "pixel_clk");
373 if (IS_ERR(msm_host->pixel_clk)) {
374 ret = PTR_ERR(msm_host->pixel_clk);
375 pr_err("%s: can't find dsi_pixel_clk. ret=%d\n",
376 __func__, ret);
377 msm_host->pixel_clk = NULL;
378 goto exit;
379 }
380
381 msm_host->esc_clk = devm_clk_get(dev, "core_clk");
382 if (IS_ERR(msm_host->esc_clk)) {
383 ret = PTR_ERR(msm_host->esc_clk);
384 pr_err("%s: can't find dsi_esc_clk. ret=%d\n",
385 __func__, ret);
386 msm_host->esc_clk = NULL;
387 goto exit;
388 }
389
390 msm_host->byte_clk_src = clk_get_parent(msm_host->byte_clk);
391 if (!msm_host->byte_clk_src) {
392 ret = -ENODEV;
393 pr_err("%s: can't find byte_clk_src. ret=%d\n", __func__, ret);
394 goto exit;
395 }
396
397 msm_host->pixel_clk_src = clk_get_parent(msm_host->pixel_clk);
398 if (!msm_host->pixel_clk_src) {
399 ret = -ENODEV;
400 pr_err("%s: can't find pixel_clk_src. ret=%d\n", __func__, ret);
401 goto exit;
402 }
403
404 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_V2) {
405 msm_host->src_clk = devm_clk_get(dev, "src_clk");
406 if (IS_ERR(msm_host->src_clk)) {
407 ret = PTR_ERR(msm_host->src_clk);
408 pr_err("%s: can't find dsi_src_clk. ret=%d\n",
409 __func__, ret);
410 msm_host->src_clk = NULL;
411 goto exit;
412 }
413
414 msm_host->esc_clk_src = clk_get_parent(msm_host->esc_clk);
415 if (!msm_host->esc_clk_src) {
416 ret = -ENODEV;
417 pr_err("%s: can't get esc_clk_src. ret=%d\n",
418 __func__, ret);
419 goto exit;
420 }
421
422 msm_host->dsi_clk_src = clk_get_parent(msm_host->src_clk);
423 if (!msm_host->dsi_clk_src) {
424 ret = -ENODEV;
425 pr_err("%s: can't get dsi_clk_src. ret=%d\n",
426 __func__, ret);
427 }
428 }
429exit:
430 return ret;
431}
432
433static int dsi_bus_clk_enable(struct msm_dsi_host *msm_host)
434{
435 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
436 int i, ret;
437
438 DBG("id=%d", msm_host->id);
439
440 for (i = 0; i < cfg->num_bus_clks; i++) {
441 ret = clk_prepare_enable(msm_host->bus_clks[i]);
442 if (ret) {
443 pr_err("%s: failed to enable bus clock %d ret %d\n",
444 __func__, i, ret);
445 goto err;
446 }
447 }
448
449 return 0;
450err:
451 for (; i > 0; i--)
452 clk_disable_unprepare(msm_host->bus_clks[i]);
453
454 return ret;
455}
456
457static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host)
458{
459 const struct msm_dsi_config *cfg = msm_host->cfg_hnd->cfg;
460 int i;
461
462 DBG("");
463
464 for (i = cfg->num_bus_clks - 1; i >= 0; i--)
465 clk_disable_unprepare(msm_host->bus_clks[i]);
466}
467
468static int dsi_link_clk_enable_6g(struct msm_dsi_host *msm_host)
469{
470 int ret;
471
472 DBG("Set clk rates: pclk=%d, byteclk=%d",
473 msm_host->mode->clock, msm_host->byte_clk_rate);
474
475 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
476 if (ret) {
477 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
478 goto error;
479 }
480
481 ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000);
482 if (ret) {
483 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
484 goto error;
485 }
486
487 ret = clk_prepare_enable(msm_host->esc_clk);
488 if (ret) {
489 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
490 goto error;
491 }
492
493 ret = clk_prepare_enable(msm_host->byte_clk);
494 if (ret) {
495 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
496 goto byte_clk_err;
497 }
498
499 ret = clk_prepare_enable(msm_host->pixel_clk);
500 if (ret) {
501 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
502 goto pixel_clk_err;
503 }
504
505 return 0;
506
507pixel_clk_err:
508 clk_disable_unprepare(msm_host->byte_clk);
509byte_clk_err:
510 clk_disable_unprepare(msm_host->esc_clk);
511error:
512 return ret;
513}
514
515static int dsi_link_clk_enable_v2(struct msm_dsi_host *msm_host)
516{
517 int ret;
518
519 DBG("Set clk rates: pclk=%d, byteclk=%d, esc_clk=%d, dsi_src_clk=%d",
520 msm_host->mode->clock, msm_host->byte_clk_rate,
521 msm_host->esc_clk_rate, msm_host->src_clk_rate);
522
523 ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate);
524 if (ret) {
525 pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret);
526 goto error;
527 }
528
529 ret = clk_set_rate(msm_host->esc_clk, msm_host->esc_clk_rate);
530 if (ret) {
531 pr_err("%s: Failed to set rate esc clk, %d\n", __func__, ret);
532 goto error;
533 }
534
535 ret = clk_set_rate(msm_host->src_clk, msm_host->src_clk_rate);
536 if (ret) {
537 pr_err("%s: Failed to set rate src clk, %d\n", __func__, ret);
538 goto error;
539 }
540
541 ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000);
542 if (ret) {
543 pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret);
544 goto error;
545 }
546
547 ret = clk_prepare_enable(msm_host->byte_clk);
548 if (ret) {
549 pr_err("%s: Failed to enable dsi byte clk\n", __func__);
550 goto error;
551 }
552
553 ret = clk_prepare_enable(msm_host->esc_clk);
554 if (ret) {
555 pr_err("%s: Failed to enable dsi esc clk\n", __func__);
556 goto esc_clk_err;
557 }
558
559 ret = clk_prepare_enable(msm_host->src_clk);
560 if (ret) {
561 pr_err("%s: Failed to enable dsi src clk\n", __func__);
562 goto src_clk_err;
563 }
564
565 ret = clk_prepare_enable(msm_host->pixel_clk);
566 if (ret) {
567 pr_err("%s: Failed to enable dsi pixel clk\n", __func__);
568 goto pixel_clk_err;
569 }
570
571 return 0;
572
573pixel_clk_err:
574 clk_disable_unprepare(msm_host->src_clk);
575src_clk_err:
576 clk_disable_unprepare(msm_host->esc_clk);
577esc_clk_err:
578 clk_disable_unprepare(msm_host->byte_clk);
579error:
580 return ret;
581}
582
583static int dsi_link_clk_enable(struct msm_dsi_host *msm_host)
584{
585 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
586
587 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G)
588 return dsi_link_clk_enable_6g(msm_host);
589 else
590 return dsi_link_clk_enable_v2(msm_host);
591}
592
593static void dsi_link_clk_disable(struct msm_dsi_host *msm_host)
594{
595 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
596
597 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
598 clk_disable_unprepare(msm_host->esc_clk);
599 clk_disable_unprepare(msm_host->pixel_clk);
600 clk_disable_unprepare(msm_host->byte_clk);
601 } else {
602 clk_disable_unprepare(msm_host->pixel_clk);
603 clk_disable_unprepare(msm_host->src_clk);
604 clk_disable_unprepare(msm_host->esc_clk);
605 clk_disable_unprepare(msm_host->byte_clk);
606 }
607}
608
609static int dsi_clk_ctrl(struct msm_dsi_host *msm_host, bool enable)
610{
611 int ret = 0;
612
613 mutex_lock(&msm_host->clk_mutex);
614 if (enable) {
615 ret = dsi_bus_clk_enable(msm_host);
616 if (ret) {
617 pr_err("%s: Can not enable bus clk, %d\n",
618 __func__, ret);
619 goto unlock_ret;
620 }
621 ret = dsi_link_clk_enable(msm_host);
622 if (ret) {
623 pr_err("%s: Can not enable link clk, %d\n",
624 __func__, ret);
625 dsi_bus_clk_disable(msm_host);
626 goto unlock_ret;
627 }
628 } else {
629 dsi_link_clk_disable(msm_host);
630 dsi_bus_clk_disable(msm_host);
631 }
632
633unlock_ret:
634 mutex_unlock(&msm_host->clk_mutex);
635 return ret;
636}
637
638static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host)
639{
640 struct drm_display_mode *mode = msm_host->mode;
641 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
642 u8 lanes = msm_host->lanes;
643 u32 bpp = dsi_get_bpp(msm_host->format);
644 u32 pclk_rate;
645
646 if (!mode) {
647 pr_err("%s: mode not set\n", __func__);
648 return -EINVAL;
649 }
650
651 pclk_rate = mode->clock * 1000;
652 if (lanes > 0) {
653 msm_host->byte_clk_rate = (pclk_rate * bpp) / (8 * lanes);
654 } else {
655 pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__);
656 msm_host->byte_clk_rate = (pclk_rate * bpp) / 8;
657 }
658
659 DBG("pclk=%d, bclk=%d", pclk_rate, msm_host->byte_clk_rate);
660
661 msm_host->esc_clk_rate = clk_get_rate(msm_host->esc_clk);
662
663 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_V2) {
664 unsigned int esc_mhz, esc_div;
665 unsigned long byte_mhz;
666
667 msm_host->src_clk_rate = (pclk_rate * bpp) / 8;
668
669 /*
670 * esc clock is byte clock followed by a 4 bit divider,
671 * we need to find an escape clock frequency within the
672 * mipi DSI spec range within the maximum divider limit
673 * We iterate here between an escape clock frequencey
674 * between 20 Mhz to 5 Mhz and pick up the first one
675 * that can be supported by our divider
676 */
677
678 byte_mhz = msm_host->byte_clk_rate / 1000000;
679
680 for (esc_mhz = 20; esc_mhz >= 5; esc_mhz--) {
681 esc_div = DIV_ROUND_UP(byte_mhz, esc_mhz);
682
683 /*
684 * TODO: Ideally, we shouldn't know what sort of divider
685 * is available in mmss_cc, we're just assuming that
686 * it'll always be a 4 bit divider. Need to come up with
687 * a better way here.
688 */
689 if (esc_div >= 1 && esc_div <= 16)
690 break;
691 }
692
693 if (esc_mhz < 5)
694 return -EINVAL;
695
696 msm_host->esc_clk_rate = msm_host->byte_clk_rate / esc_div;
697
698 DBG("esc=%d, src=%d", msm_host->esc_clk_rate,
699 msm_host->src_clk_rate);
700 }
701
702 return 0;
703}
704
705static void dsi_phy_sw_reset(struct msm_dsi_host *msm_host)
706{
707 DBG("");
708 dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET);
709 /* Make sure fully reset */
710 wmb();
711 udelay(1000);
712 dsi_write(msm_host, REG_DSI_PHY_RESET, 0);
713 udelay(100);
714}
715
716static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable)
717{
718 u32 intr;
719 unsigned long flags;
720
721 spin_lock_irqsave(&msm_host->intr_lock, flags);
722 intr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
723
724 if (enable)
725 intr |= mask;
726 else
727 intr &= ~mask;
728
729 DBG("intr=%x enable=%d", intr, enable);
730
731 dsi_write(msm_host, REG_DSI_INTR_CTRL, intr);
732 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
733}
734
735static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags)
736{
737 if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST)
738 return BURST_MODE;
739 else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)
740 return NON_BURST_SYNCH_PULSE;
741
742 return NON_BURST_SYNCH_EVENT;
743}
744
745static inline enum dsi_vid_dst_format dsi_get_vid_fmt(
746 const enum mipi_dsi_pixel_format mipi_fmt)
747{
748 switch (mipi_fmt) {
749 case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888;
750 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE;
751 case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666;
752 case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565;
753 default: return VID_DST_FORMAT_RGB888;
754 }
755}
756
757static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt(
758 const enum mipi_dsi_pixel_format mipi_fmt)
759{
760 switch (mipi_fmt) {
761 case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888;
762 case MIPI_DSI_FMT_RGB666_PACKED:
763 case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666;
764 case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565;
765 default: return CMD_DST_FORMAT_RGB888;
766 }
767}
768
769static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable,
770 u32 clk_pre, u32 clk_post)
771{
772 u32 flags = msm_host->mode_flags;
773 enum mipi_dsi_pixel_format mipi_fmt = msm_host->format;
774 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
775 u32 data = 0;
776
777 if (!enable) {
778 dsi_write(msm_host, REG_DSI_CTRL, 0);
779 return;
780 }
781
782 if (flags & MIPI_DSI_MODE_VIDEO) {
783 if (flags & MIPI_DSI_MODE_VIDEO_HSE)
784 data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE;
785 if (flags & MIPI_DSI_MODE_VIDEO_HFP)
786 data |= DSI_VID_CFG0_HFP_POWER_STOP;
787 if (flags & MIPI_DSI_MODE_VIDEO_HBP)
788 data |= DSI_VID_CFG0_HBP_POWER_STOP;
789 if (flags & MIPI_DSI_MODE_VIDEO_HSA)
790 data |= DSI_VID_CFG0_HSA_POWER_STOP;
791 /* Always set low power stop mode for BLLP
792 * to let command engine send packets
793 */
794 data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP |
795 DSI_VID_CFG0_BLLP_POWER_STOP;
796 data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags));
797 data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt));
798 data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel);
799 dsi_write(msm_host, REG_DSI_VID_CFG0, data);
800
801 /* Do not swap RGB colors */
802 data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB);
803 dsi_write(msm_host, REG_DSI_VID_CFG1, 0);
804 } else {
805 /* Do not swap RGB colors */
806 data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB);
807 data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt));
808 dsi_write(msm_host, REG_DSI_CMD_CFG0, data);
809
810 data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) |
811 DSI_CMD_CFG1_WR_MEM_CONTINUE(
812 MIPI_DCS_WRITE_MEMORY_CONTINUE);
813 /* Always insert DCS command */
814 data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND;
815 dsi_write(msm_host, REG_DSI_CMD_CFG1, data);
816 }
817
818 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL,
819 DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER |
820 DSI_CMD_DMA_CTRL_LOW_POWER);
821
822 data = 0;
823 /* Always assume dedicated TE pin */
824 data |= DSI_TRIG_CTRL_TE;
825 data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE);
826 data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW);
827 data |= DSI_TRIG_CTRL_STREAM(msm_host->channel);
828 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
829 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_2))
830 data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME;
831 dsi_write(msm_host, REG_DSI_TRIG_CTRL, data);
832
833 data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(clk_post) |
834 DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(clk_pre);
835 dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data);
836
837 data = 0;
838 if (!(flags & MIPI_DSI_MODE_EOT_PACKET))
839 data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND;
840 dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data);
841
842 /* allow only ack-err-status to generate interrupt */
843 dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0);
844
845 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
846
847 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
848
849 data = DSI_CTRL_CLK_EN;
850
851 DBG("lane number=%d", msm_host->lanes);
852 data |= ((DSI_CTRL_LANE0 << msm_host->lanes) - DSI_CTRL_LANE0);
853
854 dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL,
855 DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(msm_host->dlane_swap));
856
857 if (!(flags & MIPI_DSI_CLOCK_NON_CONTINUOUS))
858 dsi_write(msm_host, REG_DSI_LANE_CTRL,
859 DSI_LANE_CTRL_CLKLN_HS_FORCE_REQUEST);
860
861 data |= DSI_CTRL_ENABLE;
862
863 dsi_write(msm_host, REG_DSI_CTRL, data);
864}
865
866static void dsi_timing_setup(struct msm_dsi_host *msm_host)
867{
868 struct drm_display_mode *mode = msm_host->mode;
869 u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */
870 u32 h_total = mode->htotal;
871 u32 v_total = mode->vtotal;
872 u32 hs_end = mode->hsync_end - mode->hsync_start;
873 u32 vs_end = mode->vsync_end - mode->vsync_start;
874 u32 ha_start = h_total - mode->hsync_start;
875 u32 ha_end = ha_start + mode->hdisplay;
876 u32 va_start = v_total - mode->vsync_start;
877 u32 va_end = va_start + mode->vdisplay;
878 u32 wc;
879
880 DBG("");
881
882 if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) {
883 dsi_write(msm_host, REG_DSI_ACTIVE_H,
884 DSI_ACTIVE_H_START(ha_start) |
885 DSI_ACTIVE_H_END(ha_end));
886 dsi_write(msm_host, REG_DSI_ACTIVE_V,
887 DSI_ACTIVE_V_START(va_start) |
888 DSI_ACTIVE_V_END(va_end));
889 dsi_write(msm_host, REG_DSI_TOTAL,
890 DSI_TOTAL_H_TOTAL(h_total - 1) |
891 DSI_TOTAL_V_TOTAL(v_total - 1));
892
893 dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC,
894 DSI_ACTIVE_HSYNC_START(hs_start) |
895 DSI_ACTIVE_HSYNC_END(hs_end));
896 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0);
897 dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS,
898 DSI_ACTIVE_VSYNC_VPOS_START(vs_start) |
899 DSI_ACTIVE_VSYNC_VPOS_END(vs_end));
900 } else { /* command mode */
901 /* image data and 1 byte write_memory_start cmd */
902 wc = mode->hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1;
903
904 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_CTRL,
905 DSI_CMD_MDP_STREAM_CTRL_WORD_COUNT(wc) |
906 DSI_CMD_MDP_STREAM_CTRL_VIRTUAL_CHANNEL(
907 msm_host->channel) |
908 DSI_CMD_MDP_STREAM_CTRL_DATA_TYPE(
909 MIPI_DSI_DCS_LONG_WRITE));
910
911 dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_TOTAL,
912 DSI_CMD_MDP_STREAM_TOTAL_H_TOTAL(mode->hdisplay) |
913 DSI_CMD_MDP_STREAM_TOTAL_V_TOTAL(mode->vdisplay));
914 }
915}
916
917static void dsi_sw_reset(struct msm_dsi_host *msm_host)
918{
919 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
920 wmb(); /* clocks need to be enabled before reset */
921
922 dsi_write(msm_host, REG_DSI_RESET, 1);
923 wmb(); /* make sure reset happen */
924 dsi_write(msm_host, REG_DSI_RESET, 0);
925}
926
927static void dsi_op_mode_config(struct msm_dsi_host *msm_host,
928 bool video_mode, bool enable)
929{
930 u32 dsi_ctrl;
931
932 dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL);
933
934 if (!enable) {
935 dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN |
936 DSI_CTRL_CMD_MODE_EN);
937 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE |
938 DSI_IRQ_MASK_VIDEO_DONE, 0);
939 } else {
940 if (video_mode) {
941 dsi_ctrl |= DSI_CTRL_VID_MODE_EN;
942 } else { /* command mode */
943 dsi_ctrl |= DSI_CTRL_CMD_MODE_EN;
944 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1);
945 }
946 dsi_ctrl |= DSI_CTRL_ENABLE;
947 }
948
949 dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl);
950}
951
952static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
953{
954 u32 data;
955
956 data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL);
957
958 if (mode == 0)
959 data &= ~DSI_CMD_DMA_CTRL_LOW_POWER;
960 else
961 data |= DSI_CMD_DMA_CTRL_LOW_POWER;
962
963 dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data);
964}
965
966static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
967{
968 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
969
970 reinit_completion(&msm_host->video_comp);
971
972 wait_for_completion_timeout(&msm_host->video_comp,
973 msecs_to_jiffies(70));
974
975 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
976}
977
978static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host)
979{
980 if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO))
981 return;
982
983 if (msm_host->power_on) {
984 dsi_wait4video_done(msm_host);
985 /* delay 4 ms to skip BLLP */
986 usleep_range(2000, 4000);
987 }
988}
989
990/* dsi_cmd */
991static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size)
992{
993 struct drm_device *dev = msm_host->dev;
994 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
995 int ret;
996 u32 iova;
997
998 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
999 mutex_lock(&dev->struct_mutex);
1000 msm_host->tx_gem_obj = msm_gem_new(dev, size, MSM_BO_UNCACHED);
1001 if (IS_ERR(msm_host->tx_gem_obj)) {
1002 ret = PTR_ERR(msm_host->tx_gem_obj);
1003 pr_err("%s: failed to allocate gem, %d\n",
1004 __func__, ret);
1005 msm_host->tx_gem_obj = NULL;
1006 mutex_unlock(&dev->struct_mutex);
1007 return ret;
1008 }
1009
1010 ret = msm_gem_get_iova_locked(msm_host->tx_gem_obj, 0, &iova);
1011 mutex_unlock(&dev->struct_mutex);
1012 if (ret) {
1013 pr_err("%s: failed to get iova, %d\n", __func__, ret);
1014 return ret;
1015 }
1016
1017 if (iova & 0x07) {
1018 pr_err("%s: buf NOT 8 bytes aligned\n", __func__);
1019 return -EINVAL;
1020 }
1021
1022 msm_host->tx_size = msm_host->tx_gem_obj->size;
1023 } else {
1024 msm_host->tx_buf = dma_alloc_coherent(dev->dev, size,
1025 &msm_host->tx_buf_paddr, GFP_KERNEL);
1026 if (!msm_host->tx_buf) {
1027 ret = -ENOMEM;
1028 pr_err("%s: failed to allocate tx buf, %d\n",
1029 __func__, ret);
1030 return ret;
1031 }
1032
1033 msm_host->tx_size = size;
1034 }
1035
1036 return 0;
1037}
1038
1039static void dsi_tx_buf_free(struct msm_dsi_host *msm_host)
1040{
1041 struct drm_device *dev = msm_host->dev;
1042
1043 if (msm_host->tx_gem_obj) {
1044 msm_gem_put_iova(msm_host->tx_gem_obj, 0);
1045 mutex_lock(&dev->struct_mutex);
1046 msm_gem_free_object(msm_host->tx_gem_obj);
1047 msm_host->tx_gem_obj = NULL;
1048 mutex_unlock(&dev->struct_mutex);
1049 }
1050
1051 if (msm_host->tx_buf)
1052 dma_free_coherent(dev->dev, msm_host->tx_size, msm_host->tx_buf,
1053 msm_host->tx_buf_paddr);
1054}
1055
1056/*
1057 * prepare cmd buffer to be txed
1058 */
1059static int dsi_cmd_dma_add(struct msm_dsi_host *msm_host,
1060 const struct mipi_dsi_msg *msg)
1061{
1062 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1063 struct mipi_dsi_packet packet;
1064 int len;
1065 int ret;
1066 u8 *data;
1067
1068 ret = mipi_dsi_create_packet(&packet, msg);
1069 if (ret) {
1070 pr_err("%s: create packet failed, %d\n", __func__, ret);
1071 return ret;
1072 }
1073 len = (packet.size + 3) & (~0x3);
1074
1075 if (len > msm_host->tx_size) {
1076 pr_err("%s: packet size is too big\n", __func__);
1077 return -EINVAL;
1078 }
1079
1080 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
1081 data = msm_gem_vaddr(msm_host->tx_gem_obj);
1082 if (IS_ERR(data)) {
1083 ret = PTR_ERR(data);
1084 pr_err("%s: get vaddr failed, %d\n", __func__, ret);
1085 return ret;
1086 }
1087 } else {
1088 data = msm_host->tx_buf;
1089 }
1090
1091 /* MSM specific command format in memory */
1092 data[0] = packet.header[1];
1093 data[1] = packet.header[2];
1094 data[2] = packet.header[0];
1095 data[3] = BIT(7); /* Last packet */
1096 if (mipi_dsi_packet_format_is_long(msg->type))
1097 data[3] |= BIT(6);
1098 if (msg->rx_buf && msg->rx_len)
1099 data[3] |= BIT(5);
1100
1101 /* Long packet */
1102 if (packet.payload && packet.payload_length)
1103 memcpy(data + 4, packet.payload, packet.payload_length);
1104
1105 /* Append 0xff to the end */
1106 if (packet.size < len)
1107 memset(data + packet.size, 0xff, len - packet.size);
1108
1109 return len;
1110}
1111
1112/*
1113 * dsi_short_read1_resp: 1 parameter
1114 */
1115static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1116{
1117 u8 *data = msg->rx_buf;
1118 if (data && (msg->rx_len >= 1)) {
1119 *data = buf[1]; /* strip out dcs type */
1120 return 1;
1121 } else {
1122 pr_err("%s: read data does not match with rx_buf len %zu\n",
1123 __func__, msg->rx_len);
1124 return -EINVAL;
1125 }
1126}
1127
1128/*
1129 * dsi_short_read2_resp: 2 parameter
1130 */
1131static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1132{
1133 u8 *data = msg->rx_buf;
1134 if (data && (msg->rx_len >= 2)) {
1135 data[0] = buf[1]; /* strip out dcs type */
1136 data[1] = buf[2];
1137 return 2;
1138 } else {
1139 pr_err("%s: read data does not match with rx_buf len %zu\n",
1140 __func__, msg->rx_len);
1141 return -EINVAL;
1142 }
1143}
1144
1145static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg)
1146{
1147 /* strip out 4 byte dcs header */
1148 if (msg->rx_buf && msg->rx_len)
1149 memcpy(msg->rx_buf, buf + 4, msg->rx_len);
1150
1151 return msg->rx_len;
1152}
1153
1154static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len)
1155{
1156 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1157 int ret;
1158 u32 dma_base;
1159 bool triggered;
1160
1161 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) {
1162 ret = msm_gem_get_iova(msm_host->tx_gem_obj, 0, &dma_base);
1163 if (ret) {
1164 pr_err("%s: failed to get iova: %d\n", __func__, ret);
1165 return ret;
1166 }
1167 } else {
1168 dma_base = msm_host->tx_buf_paddr;
1169 }
1170
1171 reinit_completion(&msm_host->dma_comp);
1172
1173 dsi_wait4video_eng_busy(msm_host);
1174
1175 triggered = msm_dsi_manager_cmd_xfer_trigger(
1176 msm_host->id, dma_base, len);
1177 if (triggered) {
1178 ret = wait_for_completion_timeout(&msm_host->dma_comp,
1179 msecs_to_jiffies(200));
1180 DBG("ret=%d", ret);
1181 if (ret == 0)
1182 ret = -ETIMEDOUT;
1183 else
1184 ret = len;
1185 } else
1186 ret = len;
1187
1188 return ret;
1189}
1190
1191static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host,
1192 u8 *buf, int rx_byte, int pkt_size)
1193{
1194 u32 *lp, *temp, data;
1195 int i, j = 0, cnt;
1196 u32 read_cnt;
1197 u8 reg[16];
1198 int repeated_bytes = 0;
1199 int buf_offset = buf - msm_host->rx_buf;
1200
1201 lp = (u32 *)buf;
1202 temp = (u32 *)reg;
1203 cnt = (rx_byte + 3) >> 2;
1204 if (cnt > 4)
1205 cnt = 4; /* 4 x 32 bits registers only */
1206
1207 if (rx_byte == 4)
1208 read_cnt = 4;
1209 else
1210 read_cnt = pkt_size + 6;
1211
1212 /*
1213 * In case of multiple reads from the panel, after the first read, there
1214 * is possibility that there are some bytes in the payload repeating in
1215 * the RDBK_DATA registers. Since we read all the parameters from the
1216 * panel right from the first byte for every pass. We need to skip the
1217 * repeating bytes and then append the new parameters to the rx buffer.
1218 */
1219 if (read_cnt > 16) {
1220 int bytes_shifted;
1221 /* Any data more than 16 bytes will be shifted out.
1222 * The temp read buffer should already contain these bytes.
1223 * The remaining bytes in read buffer are the repeated bytes.
1224 */
1225 bytes_shifted = read_cnt - 16;
1226 repeated_bytes = buf_offset - bytes_shifted;
1227 }
1228
1229 for (i = cnt - 1; i >= 0; i--) {
1230 data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i));
1231 *temp++ = ntohl(data); /* to host byte order */
1232 DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data));
1233 }
1234
1235 for (i = repeated_bytes; i < 16; i++)
1236 buf[j++] = reg[i];
1237
1238 return j;
1239}
1240
1241static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host,
1242 const struct mipi_dsi_msg *msg)
1243{
1244 int len, ret;
1245 int bllp_len = msm_host->mode->hdisplay *
1246 dsi_get_bpp(msm_host->format) / 8;
1247
1248 len = dsi_cmd_dma_add(msm_host, msg);
1249 if (!len) {
1250 pr_err("%s: failed to add cmd type = 0x%x\n",
1251 __func__, msg->type);
1252 return -EINVAL;
1253 }
1254
1255 /* for video mode, do not send cmds more than
1256 * one pixel line, since it only transmit it
1257 * during BLLP.
1258 */
1259 /* TODO: if the command is sent in LP mode, the bit rate is only
1260 * half of esc clk rate. In this case, if the video is already
1261 * actively streaming, we need to check more carefully if the
1262 * command can be fit into one BLLP.
1263 */
1264 if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) {
1265 pr_err("%s: cmd cannot fit into BLLP period, len=%d\n",
1266 __func__, len);
1267 return -EINVAL;
1268 }
1269
1270 ret = dsi_cmd_dma_tx(msm_host, len);
1271 if (ret < len) {
1272 pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d\n",
1273 __func__, msg->type, (*(u8 *)(msg->tx_buf)), len);
1274 return -ECOMM;
1275 }
1276
1277 return len;
1278}
1279
1280static void dsi_sw_reset_restore(struct msm_dsi_host *msm_host)
1281{
1282 u32 data0, data1;
1283
1284 data0 = dsi_read(msm_host, REG_DSI_CTRL);
1285 data1 = data0;
1286 data1 &= ~DSI_CTRL_ENABLE;
1287 dsi_write(msm_host, REG_DSI_CTRL, data1);
1288 /*
1289 * dsi controller need to be disabled before
1290 * clocks turned on
1291 */
1292 wmb();
1293
1294 dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS);
1295 wmb(); /* make sure clocks enabled */
1296
1297 /* dsi controller can only be reset while clocks are running */
1298 dsi_write(msm_host, REG_DSI_RESET, 1);
1299 wmb(); /* make sure reset happen */
1300 dsi_write(msm_host, REG_DSI_RESET, 0);
1301 wmb(); /* controller out of reset */
1302 dsi_write(msm_host, REG_DSI_CTRL, data0);
1303 wmb(); /* make sure dsi controller enabled again */
1304}
1305
1306static void dsi_err_worker(struct work_struct *work)
1307{
1308 struct msm_dsi_host *msm_host =
1309 container_of(work, struct msm_dsi_host, err_work);
1310 u32 status = msm_host->err_work_state;
1311
1312 pr_err_ratelimited("%s: status=%x\n", __func__, status);
1313 if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW)
1314 dsi_sw_reset_restore(msm_host);
1315
1316 /* It is safe to clear here because error irq is disabled. */
1317 msm_host->err_work_state = 0;
1318
1319 /* enable dsi error interrupt */
1320 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1);
1321}
1322
1323static void dsi_ack_err_status(struct msm_dsi_host *msm_host)
1324{
1325 u32 status;
1326
1327 status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS);
1328
1329 if (status) {
1330 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status);
1331 /* Writing of an extra 0 needed to clear error bits */
1332 dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0);
1333 msm_host->err_work_state |= DSI_ERR_STATE_ACK;
1334 }
1335}
1336
1337static void dsi_timeout_status(struct msm_dsi_host *msm_host)
1338{
1339 u32 status;
1340
1341 status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS);
1342
1343 if (status) {
1344 dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status);
1345 msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT;
1346 }
1347}
1348
1349static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host)
1350{
1351 u32 status;
1352
1353 status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR);
1354
1355 if (status & (DSI_DLN0_PHY_ERR_DLN0_ERR_ESC |
1356 DSI_DLN0_PHY_ERR_DLN0_ERR_SYNC_ESC |
1357 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTROL |
1358 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP0 |
1359 DSI_DLN0_PHY_ERR_DLN0_ERR_CONTENTION_LP1)) {
1360 dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status);
1361 msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY;
1362 }
1363}
1364
1365static void dsi_fifo_status(struct msm_dsi_host *msm_host)
1366{
1367 u32 status;
1368
1369 status = dsi_read(msm_host, REG_DSI_FIFO_STATUS);
1370
1371 /* fifo underflow, overflow */
1372 if (status) {
1373 dsi_write(msm_host, REG_DSI_FIFO_STATUS, status);
1374 msm_host->err_work_state |= DSI_ERR_STATE_FIFO;
1375 if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW)
1376 msm_host->err_work_state |=
1377 DSI_ERR_STATE_MDP_FIFO_UNDERFLOW;
1378 }
1379}
1380
1381static void dsi_status(struct msm_dsi_host *msm_host)
1382{
1383 u32 status;
1384
1385 status = dsi_read(msm_host, REG_DSI_STATUS0);
1386
1387 if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) {
1388 dsi_write(msm_host, REG_DSI_STATUS0, status);
1389 msm_host->err_work_state |=
1390 DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION;
1391 }
1392}
1393
1394static void dsi_clk_status(struct msm_dsi_host *msm_host)
1395{
1396 u32 status;
1397
1398 status = dsi_read(msm_host, REG_DSI_CLK_STATUS);
1399
1400 if (status & DSI_CLK_STATUS_PLL_UNLOCKED) {
1401 dsi_write(msm_host, REG_DSI_CLK_STATUS, status);
1402 msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED;
1403 }
1404}
1405
1406static void dsi_error(struct msm_dsi_host *msm_host)
1407{
1408 /* disable dsi error interrupt */
1409 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0);
1410
1411 dsi_clk_status(msm_host);
1412 dsi_fifo_status(msm_host);
1413 dsi_ack_err_status(msm_host);
1414 dsi_timeout_status(msm_host);
1415 dsi_status(msm_host);
1416 dsi_dln0_phy_err(msm_host);
1417
1418 queue_work(msm_host->workqueue, &msm_host->err_work);
1419}
1420
1421static irqreturn_t dsi_host_irq(int irq, void *ptr)
1422{
1423 struct msm_dsi_host *msm_host = ptr;
1424 u32 isr;
1425 unsigned long flags;
1426
1427 if (!msm_host->ctrl_base)
1428 return IRQ_HANDLED;
1429
1430 spin_lock_irqsave(&msm_host->intr_lock, flags);
1431 isr = dsi_read(msm_host, REG_DSI_INTR_CTRL);
1432 dsi_write(msm_host, REG_DSI_INTR_CTRL, isr);
1433 spin_unlock_irqrestore(&msm_host->intr_lock, flags);
1434
1435 DBG("isr=0x%x, id=%d", isr, msm_host->id);
1436
1437 if (isr & DSI_IRQ_ERROR)
1438 dsi_error(msm_host);
1439
1440 if (isr & DSI_IRQ_VIDEO_DONE)
1441 complete(&msm_host->video_comp);
1442
1443 if (isr & DSI_IRQ_CMD_DMA_DONE)
1444 complete(&msm_host->dma_comp);
1445
1446 return IRQ_HANDLED;
1447}
1448
1449static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host,
1450 struct device *panel_device)
1451{
1452 msm_host->disp_en_gpio = devm_gpiod_get_optional(panel_device,
1453 "disp-enable",
1454 GPIOD_OUT_LOW);
1455 if (IS_ERR(msm_host->disp_en_gpio)) {
1456 DBG("cannot get disp-enable-gpios %ld",
1457 PTR_ERR(msm_host->disp_en_gpio));
1458 return PTR_ERR(msm_host->disp_en_gpio);
1459 }
1460
1461 msm_host->te_gpio = devm_gpiod_get_optional(panel_device, "disp-te",
1462 GPIOD_IN);
1463 if (IS_ERR(msm_host->te_gpio)) {
1464 DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio));
1465 return PTR_ERR(msm_host->te_gpio);
1466 }
1467
1468 return 0;
1469}
1470
1471static int dsi_host_attach(struct mipi_dsi_host *host,
1472 struct mipi_dsi_device *dsi)
1473{
1474 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1475 int ret;
1476
1477 if (dsi->lanes > msm_host->num_data_lanes)
1478 return -EINVAL;
1479
1480 msm_host->channel = dsi->channel;
1481 msm_host->lanes = dsi->lanes;
1482 msm_host->format = dsi->format;
1483 msm_host->mode_flags = dsi->mode_flags;
1484
1485 /* Some gpios defined in panel DT need to be controlled by host */
1486 ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev);
1487 if (ret)
1488 return ret;
1489
1490 DBG("id=%d", msm_host->id);
1491 if (msm_host->dev)
1492 drm_helper_hpd_irq_event(msm_host->dev);
1493
1494 return 0;
1495}
1496
1497static int dsi_host_detach(struct mipi_dsi_host *host,
1498 struct mipi_dsi_device *dsi)
1499{
1500 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1501
1502 msm_host->device_node = NULL;
1503
1504 DBG("id=%d", msm_host->id);
1505 if (msm_host->dev)
1506 drm_helper_hpd_irq_event(msm_host->dev);
1507
1508 return 0;
1509}
1510
1511static ssize_t dsi_host_transfer(struct mipi_dsi_host *host,
1512 const struct mipi_dsi_msg *msg)
1513{
1514 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1515 int ret;
1516
1517 if (!msg || !msm_host->power_on)
1518 return -EINVAL;
1519
1520 mutex_lock(&msm_host->cmd_mutex);
1521 ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg);
1522 mutex_unlock(&msm_host->cmd_mutex);
1523
1524 return ret;
1525}
1526
1527static struct mipi_dsi_host_ops dsi_host_ops = {
1528 .attach = dsi_host_attach,
1529 .detach = dsi_host_detach,
1530 .transfer = dsi_host_transfer,
1531};
1532
1533/*
1534 * List of supported physical to logical lane mappings.
1535 * For example, the 2nd entry represents the following mapping:
1536 *
1537 * "3012": Logic 3->Phys 0; Logic 0->Phys 1; Logic 1->Phys 2; Logic 2->Phys 3;
1538 */
1539static const int supported_data_lane_swaps[][4] = {
1540 { 0, 1, 2, 3 },
1541 { 3, 0, 1, 2 },
1542 { 2, 3, 0, 1 },
1543 { 1, 2, 3, 0 },
1544 { 0, 3, 2, 1 },
1545 { 1, 0, 3, 2 },
1546 { 2, 1, 0, 3 },
1547 { 3, 2, 1, 0 },
1548};
1549
1550static int dsi_host_parse_lane_data(struct msm_dsi_host *msm_host,
1551 struct device_node *ep)
1552{
1553 struct device *dev = &msm_host->pdev->dev;
1554 struct property *prop;
1555 u32 lane_map[4];
1556 int ret, i, len, num_lanes;
1557
1558 prop = of_find_property(ep, "qcom,data-lane-map", &len);
1559 if (!prop) {
1560 dev_dbg(dev, "failed to find data lane mapping\n");
1561 return -EINVAL;
1562 }
1563
1564 num_lanes = len / sizeof(u32);
1565
1566 if (num_lanes < 1 || num_lanes > 4) {
1567 dev_err(dev, "bad number of data lanes\n");
1568 return -EINVAL;
1569 }
1570
1571 msm_host->num_data_lanes = num_lanes;
1572
1573 ret = of_property_read_u32_array(ep, "qcom,data-lane-map", lane_map,
1574 num_lanes);
1575 if (ret) {
1576 dev_err(dev, "failed to read lane data\n");
1577 return ret;
1578 }
1579
1580 /*
1581 * compare DT specified physical-logical lane mappings with the ones
1582 * supported by hardware
1583 */
1584 for (i = 0; i < ARRAY_SIZE(supported_data_lane_swaps); i++) {
1585 const int *swap = supported_data_lane_swaps[i];
1586 int j;
1587
1588 for (j = 0; j < num_lanes; j++) {
1589 if (swap[j] != lane_map[j])
1590 break;
1591 }
1592
1593 if (j == num_lanes) {
1594 msm_host->dlane_swap = i;
1595 return 0;
1596 }
1597 }
1598
1599 return -EINVAL;
1600}
1601
1602static int dsi_host_parse_dt(struct msm_dsi_host *msm_host)
1603{
1604 struct device *dev = &msm_host->pdev->dev;
1605 struct device_node *np = dev->of_node;
1606 struct device_node *endpoint, *device_node;
1607 int ret;
1608
1609 ret = of_property_read_u32(np, "qcom,dsi-host-index", &msm_host->id);
1610 if (ret) {
1611 dev_err(dev, "%s: host index not specified, ret=%d\n",
1612 __func__, ret);
1613 return ret;
1614 }
1615
1616 /*
1617 * Get the first endpoint node. In our case, dsi has one output port
1618 * to which the panel is connected. Don't return an error if a port
1619 * isn't defined. It's possible that there is nothing connected to
1620 * the dsi output.
1621 */
1622 endpoint = of_graph_get_next_endpoint(np, NULL);
1623 if (!endpoint) {
1624 dev_dbg(dev, "%s: no endpoint\n", __func__);
1625 return 0;
1626 }
1627
1628 ret = dsi_host_parse_lane_data(msm_host, endpoint);
1629 if (ret) {
1630 dev_err(dev, "%s: invalid lane configuration %d\n",
1631 __func__, ret);
1632 goto err;
1633 }
1634
1635 /* Get panel node from the output port's endpoint data */
1636 device_node = of_graph_get_remote_port_parent(endpoint);
1637 if (!device_node) {
1638 dev_err(dev, "%s: no valid device\n", __func__);
1639 ret = -ENODEV;
1640 goto err;
1641 }
1642
1643 msm_host->device_node = device_node;
1644
1645 if (of_property_read_bool(np, "syscon-sfpb")) {
1646 msm_host->sfpb = syscon_regmap_lookup_by_phandle(np,
1647 "syscon-sfpb");
1648 if (IS_ERR(msm_host->sfpb)) {
1649 dev_err(dev, "%s: failed to get sfpb regmap\n",
1650 __func__);
1651 ret = PTR_ERR(msm_host->sfpb);
1652 }
1653 }
1654
1655 of_node_put(device_node);
1656
1657err:
1658 of_node_put(endpoint);
1659
1660 return ret;
1661}
1662
1663int msm_dsi_host_init(struct msm_dsi *msm_dsi)
1664{
1665 struct msm_dsi_host *msm_host = NULL;
1666 struct platform_device *pdev = msm_dsi->pdev;
1667 int ret;
1668
1669 msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL);
1670 if (!msm_host) {
1671 pr_err("%s: FAILED: cannot alloc dsi host\n",
1672 __func__);
1673 ret = -ENOMEM;
1674 goto fail;
1675 }
1676
1677 msm_host->pdev = pdev;
1678
1679 ret = dsi_host_parse_dt(msm_host);
1680 if (ret) {
1681 pr_err("%s: failed to parse dt\n", __func__);
1682 goto fail;
1683 }
1684
1685 msm_host->ctrl_base = msm_ioremap(pdev, "dsi_ctrl", "DSI CTRL");
1686 if (IS_ERR(msm_host->ctrl_base)) {
1687 pr_err("%s: unable to map Dsi ctrl base\n", __func__);
1688 ret = PTR_ERR(msm_host->ctrl_base);
1689 goto fail;
1690 }
1691
1692 msm_host->cfg_hnd = dsi_get_config(msm_host);
1693 if (!msm_host->cfg_hnd) {
1694 ret = -EINVAL;
1695 pr_err("%s: get config failed\n", __func__);
1696 goto fail;
1697 }
1698
1699 /* fixup base address by io offset */
1700 msm_host->ctrl_base += msm_host->cfg_hnd->cfg->io_offset;
1701
1702 ret = dsi_regulator_init(msm_host);
1703 if (ret) {
1704 pr_err("%s: regulator init failed\n", __func__);
1705 goto fail;
1706 }
1707
1708 ret = dsi_clk_init(msm_host);
1709 if (ret) {
1710 pr_err("%s: unable to initialize dsi clks\n", __func__);
1711 goto fail;
1712 }
1713
1714 msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL);
1715 if (!msm_host->rx_buf) {
1716 pr_err("%s: alloc rx temp buf failed\n", __func__);
1717 goto fail;
1718 }
1719
1720 init_completion(&msm_host->dma_comp);
1721 init_completion(&msm_host->video_comp);
1722 mutex_init(&msm_host->dev_mutex);
1723 mutex_init(&msm_host->cmd_mutex);
1724 mutex_init(&msm_host->clk_mutex);
1725 spin_lock_init(&msm_host->intr_lock);
1726
1727 /* setup workqueue */
1728 msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0);
1729 INIT_WORK(&msm_host->err_work, dsi_err_worker);
1730
1731 msm_dsi->host = &msm_host->base;
1732 msm_dsi->id = msm_host->id;
1733
1734 DBG("Dsi Host %d initialized", msm_host->id);
1735 return 0;
1736
1737fail:
1738 return ret;
1739}
1740
1741void msm_dsi_host_destroy(struct mipi_dsi_host *host)
1742{
1743 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1744
1745 DBG("");
1746 dsi_tx_buf_free(msm_host);
1747 if (msm_host->workqueue) {
1748 flush_workqueue(msm_host->workqueue);
1749 destroy_workqueue(msm_host->workqueue);
1750 msm_host->workqueue = NULL;
1751 }
1752
1753 mutex_destroy(&msm_host->clk_mutex);
1754 mutex_destroy(&msm_host->cmd_mutex);
1755 mutex_destroy(&msm_host->dev_mutex);
1756}
1757
1758int msm_dsi_host_modeset_init(struct mipi_dsi_host *host,
1759 struct drm_device *dev)
1760{
1761 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1762 struct platform_device *pdev = msm_host->pdev;
1763 int ret;
1764
1765 msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
1766 if (msm_host->irq < 0) {
1767 ret = msm_host->irq;
1768 dev_err(dev->dev, "failed to get irq: %d\n", ret);
1769 return ret;
1770 }
1771
1772 ret = devm_request_irq(&pdev->dev, msm_host->irq,
1773 dsi_host_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
1774 "dsi_isr", msm_host);
1775 if (ret < 0) {
1776 dev_err(&pdev->dev, "failed to request IRQ%u: %d\n",
1777 msm_host->irq, ret);
1778 return ret;
1779 }
1780
1781 msm_host->dev = dev;
1782 ret = dsi_tx_buf_alloc(msm_host, SZ_4K);
1783 if (ret) {
1784 pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret);
1785 return ret;
1786 }
1787
1788 return 0;
1789}
1790
1791int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer)
1792{
1793 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1794 int ret;
1795
1796 /* Register mipi dsi host */
1797 if (!msm_host->registered) {
1798 host->dev = &msm_host->pdev->dev;
1799 host->ops = &dsi_host_ops;
1800 ret = mipi_dsi_host_register(host);
1801 if (ret)
1802 return ret;
1803
1804 msm_host->registered = true;
1805
1806 /* If the panel driver has not been probed after host register,
1807 * we should defer the host's probe.
1808 * It makes sure panel is connected when fbcon detects
1809 * connector status and gets the proper display mode to
1810 * create framebuffer.
1811 * Don't try to defer if there is nothing connected to the dsi
1812 * output
1813 */
1814 if (check_defer && msm_host->device_node) {
1815 if (!of_drm_find_panel(msm_host->device_node))
1816 if (!of_drm_find_bridge(msm_host->device_node))
1817 return -EPROBE_DEFER;
1818 }
1819 }
1820
1821 return 0;
1822}
1823
1824void msm_dsi_host_unregister(struct mipi_dsi_host *host)
1825{
1826 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1827
1828 if (msm_host->registered) {
1829 mipi_dsi_host_unregister(host);
1830 host->dev = NULL;
1831 host->ops = NULL;
1832 msm_host->registered = false;
1833 }
1834}
1835
1836int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host,
1837 const struct mipi_dsi_msg *msg)
1838{
1839 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1840
1841 /* TODO: make sure dsi_cmd_mdp is idle.
1842 * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME
1843 * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed.
1844 * How to handle the old versions? Wait for mdp cmd done?
1845 */
1846
1847 /*
1848 * mdss interrupt is generated in mdp core clock domain
1849 * mdp clock need to be enabled to receive dsi interrupt
1850 */
1851 dsi_clk_ctrl(msm_host, 1);
1852
1853 /* TODO: vote for bus bandwidth */
1854
1855 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
1856 dsi_set_tx_power_mode(0, msm_host);
1857
1858 msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL);
1859 dsi_write(msm_host, REG_DSI_CTRL,
1860 msm_host->dma_cmd_ctrl_restore |
1861 DSI_CTRL_CMD_MODE_EN |
1862 DSI_CTRL_ENABLE);
1863 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1);
1864
1865 return 0;
1866}
1867
1868void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host,
1869 const struct mipi_dsi_msg *msg)
1870{
1871 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1872
1873 dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0);
1874 dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore);
1875
1876 if (!(msg->flags & MIPI_DSI_MSG_USE_LPM))
1877 dsi_set_tx_power_mode(1, msm_host);
1878
1879 /* TODO: unvote for bus bandwidth */
1880
1881 dsi_clk_ctrl(msm_host, 0);
1882}
1883
1884int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host,
1885 const struct mipi_dsi_msg *msg)
1886{
1887 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1888
1889 return dsi_cmds2buf_tx(msm_host, msg);
1890}
1891
1892int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host,
1893 const struct mipi_dsi_msg *msg)
1894{
1895 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
1896 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
1897 int data_byte, rx_byte, dlen, end;
1898 int short_response, diff, pkt_size, ret = 0;
1899 char cmd;
1900 int rlen = msg->rx_len;
1901 u8 *buf;
1902
1903 if (rlen <= 2) {
1904 short_response = 1;
1905 pkt_size = rlen;
1906 rx_byte = 4;
1907 } else {
1908 short_response = 0;
1909 data_byte = 10; /* first read */
1910 if (rlen < data_byte)
1911 pkt_size = rlen;
1912 else
1913 pkt_size = data_byte;
1914 rx_byte = data_byte + 6; /* 4 header + 2 crc */
1915 }
1916
1917 buf = msm_host->rx_buf;
1918 end = 0;
1919 while (!end) {
1920 u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8};
1921 struct mipi_dsi_msg max_pkt_size_msg = {
1922 .channel = msg->channel,
1923 .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE,
1924 .tx_len = 2,
1925 .tx_buf = tx,
1926 };
1927
1928 DBG("rlen=%d pkt_size=%d rx_byte=%d",
1929 rlen, pkt_size, rx_byte);
1930
1931 ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg);
1932 if (ret < 2) {
1933 pr_err("%s: Set max pkt size failed, %d\n",
1934 __func__, ret);
1935 return -EINVAL;
1936 }
1937
1938 if ((cfg_hnd->major == MSM_DSI_VER_MAJOR_6G) &&
1939 (cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) {
1940 /* Clear the RDBK_DATA registers */
1941 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL,
1942 DSI_RDBK_DATA_CTRL_CLR);
1943 wmb(); /* make sure the RDBK registers are cleared */
1944 dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0);
1945 wmb(); /* release cleared status before transfer */
1946 }
1947
1948 ret = dsi_cmds2buf_tx(msm_host, msg);
1949 if (ret < msg->tx_len) {
1950 pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret);
1951 return ret;
1952 }
1953
1954 /*
1955 * once cmd_dma_done interrupt received,
1956 * return data from client is ready and stored
1957 * at RDBK_DATA register already
1958 * since rx fifo is 16 bytes, dcs header is kept at first loop,
1959 * after that dcs header lost during shift into registers
1960 */
1961 dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size);
1962
1963 if (dlen <= 0)
1964 return 0;
1965
1966 if (short_response)
1967 break;
1968
1969 if (rlen <= data_byte) {
1970 diff = data_byte - rlen;
1971 end = 1;
1972 } else {
1973 diff = 0;
1974 rlen -= data_byte;
1975 }
1976
1977 if (!end) {
1978 dlen -= 2; /* 2 crc */
1979 dlen -= diff;
1980 buf += dlen; /* next start position */
1981 data_byte = 14; /* NOT first read */
1982 if (rlen < data_byte)
1983 pkt_size += rlen;
1984 else
1985 pkt_size += data_byte;
1986 DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff);
1987 }
1988 }
1989
1990 /*
1991 * For single Long read, if the requested rlen < 10,
1992 * we need to shift the start position of rx
1993 * data buffer to skip the bytes which are not
1994 * updated.
1995 */
1996 if (pkt_size < 10 && !short_response)
1997 buf = msm_host->rx_buf + (10 - rlen);
1998 else
1999 buf = msm_host->rx_buf;
2000
2001 cmd = buf[0];
2002 switch (cmd) {
2003 case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT:
2004 pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__);
2005 ret = 0;
2006 break;
2007 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE:
2008 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE:
2009 ret = dsi_short_read1_resp(buf, msg);
2010 break;
2011 case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE:
2012 case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE:
2013 ret = dsi_short_read2_resp(buf, msg);
2014 break;
2015 case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE:
2016 case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE:
2017 ret = dsi_long_read_resp(buf, msg);
2018 break;
2019 default:
2020 pr_warn("%s:Invalid response cmd\n", __func__);
2021 ret = 0;
2022 }
2023
2024 return ret;
2025}
2026
2027void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 dma_base,
2028 u32 len)
2029{
2030 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2031
2032 dsi_write(msm_host, REG_DSI_DMA_BASE, dma_base);
2033 dsi_write(msm_host, REG_DSI_DMA_LEN, len);
2034 dsi_write(msm_host, REG_DSI_TRIG_DMA, 1);
2035
2036 /* Make sure trigger happens */
2037 wmb();
2038}
2039
2040int msm_dsi_host_set_src_pll(struct mipi_dsi_host *host,
2041 struct msm_dsi_pll *src_pll)
2042{
2043 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2044 const struct msm_dsi_cfg_handler *cfg_hnd = msm_host->cfg_hnd;
2045 struct clk *byte_clk_provider, *pixel_clk_provider;
2046 int ret;
2047
2048 ret = msm_dsi_pll_get_clk_provider(src_pll,
2049 &byte_clk_provider, &pixel_clk_provider);
2050 if (ret) {
2051 pr_info("%s: can't get provider from pll, don't set parent\n",
2052 __func__);
2053 return 0;
2054 }
2055
2056 ret = clk_set_parent(msm_host->byte_clk_src, byte_clk_provider);
2057 if (ret) {
2058 pr_err("%s: can't set parent to byte_clk_src. ret=%d\n",
2059 __func__, ret);
2060 goto exit;
2061 }
2062
2063 ret = clk_set_parent(msm_host->pixel_clk_src, pixel_clk_provider);
2064 if (ret) {
2065 pr_err("%s: can't set parent to pixel_clk_src. ret=%d\n",
2066 __func__, ret);
2067 goto exit;
2068 }
2069
2070 if (cfg_hnd->major == MSM_DSI_VER_MAJOR_V2) {
2071 ret = clk_set_parent(msm_host->dsi_clk_src, pixel_clk_provider);
2072 if (ret) {
2073 pr_err("%s: can't set parent to dsi_clk_src. ret=%d\n",
2074 __func__, ret);
2075 goto exit;
2076 }
2077
2078 ret = clk_set_parent(msm_host->esc_clk_src, byte_clk_provider);
2079 if (ret) {
2080 pr_err("%s: can't set parent to esc_clk_src. ret=%d\n",
2081 __func__, ret);
2082 goto exit;
2083 }
2084 }
2085
2086exit:
2087 return ret;
2088}
2089
2090int msm_dsi_host_enable(struct mipi_dsi_host *host)
2091{
2092 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2093
2094 dsi_op_mode_config(msm_host,
2095 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true);
2096
2097 /* TODO: clock should be turned off for command mode,
2098 * and only turned on before MDP START.
2099 * This part of code should be enabled once mdp driver support it.
2100 */
2101 /* if (msm_panel->mode == MSM_DSI_CMD_MODE)
2102 dsi_clk_ctrl(msm_host, 0); */
2103
2104 return 0;
2105}
2106
2107int msm_dsi_host_disable(struct mipi_dsi_host *host)
2108{
2109 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2110
2111 dsi_op_mode_config(msm_host,
2112 !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false);
2113
2114 /* Since we have disabled INTF, the video engine won't stop so that
2115 * the cmd engine will be blocked.
2116 * Reset to disable video engine so that we can send off cmd.
2117 */
2118 dsi_sw_reset(msm_host);
2119
2120 return 0;
2121}
2122
2123static void msm_dsi_sfpb_config(struct msm_dsi_host *msm_host, bool enable)
2124{
2125 enum sfpb_ahb_arb_master_port_en en;
2126
2127 if (!msm_host->sfpb)
2128 return;
2129
2130 en = enable ? SFPB_MASTER_PORT_ENABLE : SFPB_MASTER_PORT_DISABLE;
2131
2132 regmap_update_bits(msm_host->sfpb, REG_SFPB_GPREG,
2133 SFPB_GPREG_MASTER_PORT_EN__MASK,
2134 SFPB_GPREG_MASTER_PORT_EN(en));
2135}
2136
2137int msm_dsi_host_power_on(struct mipi_dsi_host *host)
2138{
2139 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2140 u32 clk_pre = 0, clk_post = 0;
2141 int ret = 0;
2142
2143 mutex_lock(&msm_host->dev_mutex);
2144 if (msm_host->power_on) {
2145 DBG("dsi host already on");
2146 goto unlock_ret;
2147 }
2148
2149 msm_dsi_sfpb_config(msm_host, true);
2150
2151 ret = dsi_calc_clk_rate(msm_host);
2152 if (ret) {
2153 pr_err("%s: unable to calc clk rate, %d\n", __func__, ret);
2154 goto unlock_ret;
2155 }
2156
2157 ret = dsi_host_regulator_enable(msm_host);
2158 if (ret) {
2159 pr_err("%s:Failed to enable vregs.ret=%d\n",
2160 __func__, ret);
2161 goto unlock_ret;
2162 }
2163
2164 ret = dsi_bus_clk_enable(msm_host);
2165 if (ret) {
2166 pr_err("%s: failed to enable bus clocks, %d\n", __func__, ret);
2167 goto fail_disable_reg;
2168 }
2169
2170 dsi_phy_sw_reset(msm_host);
2171 ret = msm_dsi_manager_phy_enable(msm_host->id,
2172 msm_host->byte_clk_rate * 8,
2173 msm_host->esc_clk_rate,
2174 &clk_pre, &clk_post);
2175 dsi_bus_clk_disable(msm_host);
2176 if (ret) {
2177 pr_err("%s: failed to enable phy, %d\n", __func__, ret);
2178 goto fail_disable_reg;
2179 }
2180
2181 ret = dsi_clk_ctrl(msm_host, 1);
2182 if (ret) {
2183 pr_err("%s: failed to enable clocks. ret=%d\n", __func__, ret);
2184 goto fail_disable_reg;
2185 }
2186
2187 ret = pinctrl_pm_select_default_state(&msm_host->pdev->dev);
2188 if (ret) {
2189 pr_err("%s: failed to set pinctrl default state, %d\n",
2190 __func__, ret);
2191 goto fail_disable_clk;
2192 }
2193
2194 dsi_timing_setup(msm_host);
2195 dsi_sw_reset(msm_host);
2196 dsi_ctrl_config(msm_host, true, clk_pre, clk_post);
2197
2198 if (msm_host->disp_en_gpio)
2199 gpiod_set_value(msm_host->disp_en_gpio, 1);
2200
2201 msm_host->power_on = true;
2202 mutex_unlock(&msm_host->dev_mutex);
2203
2204 return 0;
2205
2206fail_disable_clk:
2207 dsi_clk_ctrl(msm_host, 0);
2208fail_disable_reg:
2209 dsi_host_regulator_disable(msm_host);
2210unlock_ret:
2211 mutex_unlock(&msm_host->dev_mutex);
2212 return ret;
2213}
2214
2215int msm_dsi_host_power_off(struct mipi_dsi_host *host)
2216{
2217 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2218
2219 mutex_lock(&msm_host->dev_mutex);
2220 if (!msm_host->power_on) {
2221 DBG("dsi host already off");
2222 goto unlock_ret;
2223 }
2224
2225 dsi_ctrl_config(msm_host, false, 0, 0);
2226
2227 if (msm_host->disp_en_gpio)
2228 gpiod_set_value(msm_host->disp_en_gpio, 0);
2229
2230 pinctrl_pm_select_sleep_state(&msm_host->pdev->dev);
2231
2232 msm_dsi_manager_phy_disable(msm_host->id);
2233
2234 dsi_clk_ctrl(msm_host, 0);
2235
2236 dsi_host_regulator_disable(msm_host);
2237
2238 msm_dsi_sfpb_config(msm_host, false);
2239
2240 DBG("-");
2241
2242 msm_host->power_on = false;
2243
2244unlock_ret:
2245 mutex_unlock(&msm_host->dev_mutex);
2246 return 0;
2247}
2248
2249int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host,
2250 struct drm_display_mode *mode)
2251{
2252 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2253
2254 if (msm_host->mode) {
2255 drm_mode_destroy(msm_host->dev, msm_host->mode);
2256 msm_host->mode = NULL;
2257 }
2258
2259 msm_host->mode = drm_mode_duplicate(msm_host->dev, mode);
2260 if (IS_ERR(msm_host->mode)) {
2261 pr_err("%s: cannot duplicate mode\n", __func__);
2262 return PTR_ERR(msm_host->mode);
2263 }
2264
2265 return 0;
2266}
2267
2268struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host,
2269 unsigned long *panel_flags)
2270{
2271 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2272 struct drm_panel *panel;
2273
2274 panel = of_drm_find_panel(msm_host->device_node);
2275 if (panel_flags)
2276 *panel_flags = msm_host->mode_flags;
2277
2278 return panel;
2279}
2280
2281struct drm_bridge *msm_dsi_host_get_bridge(struct mipi_dsi_host *host)
2282{
2283 struct msm_dsi_host *msm_host = to_msm_dsi_host(host);
2284
2285 return of_drm_find_bridge(msm_host->device_node);
2286}