1 /*
2  * SPDX-License-Identifier: GPL-2.0
3  * Copyright (c) 2018, The Linux Foundation
4  */
5 
6 #include <linux/clk.h>
7 #include <linux/clk-provider.h>
8 #include <linux/iopoll.h>
9 
10 #include "dsi_phy.h"
11 #include "dsi.xml.h"
12 #include "dsi_phy_10nm.xml.h"
13 
14 /*
15  * DSI PLL 10nm - clock diagram (eg: DSI0):
16  *
17  *           dsi0_pll_out_div_clk  dsi0_pll_bit_clk
18  *                              |                |
19  *                              |                |
20  *                 +---------+  |  +----------+  |  +----+
21  *  dsi0vco_clk ---| out_div |--o--| divl_3_0 |--o--| /8 |-- dsi0_phy_pll_out_byteclk
22  *                 +---------+  |  +----------+  |  +----+
23  *                              |                |
24  *                              |                |         dsi0_pll_by_2_bit_clk
25  *                              |                |          |
26  *                              |                |  +----+  |  |\  dsi0_pclk_mux
27  *                              |                |--| /2 |--o--| \   |
28  *                              |                |  +----+     |  \  |  +---------+
29  *                              |                --------------|  |--o--| div_7_4 |-- dsi0_phy_pll_out_dsiclk
30  *                              |------------------------------|  /     +---------+
31  *                              |          +-----+             | /
32  *                              -----------| /4? |--o----------|/
33  *                                         +-----+  |           |
34  *                                                  |           |dsiclk_sel
35  *                                                  |
36  *                                                  dsi0_pll_post_out_div_clk
37  */
38 
39 #define VCO_REF_CLK_RATE		19200000
40 #define FRAC_BITS 18
41 
42 /* v3.0.0 10nm implementation that requires the old timings settings */
43 #define DSI_PHY_10NM_QUIRK_OLD_TIMINGS	BIT(0)
44 
45 struct dsi_pll_config {
46 	bool enable_ssc;
47 	bool ssc_center;
48 	u32 ssc_freq;
49 	u32 ssc_offset;
50 	u32 ssc_adj_per;
51 
52 	/* out */
53 	u32 pll_prop_gain_rate;
54 	u32 decimal_div_start;
55 	u32 frac_div_start;
56 	u32 pll_clock_inverters;
57 	u32 ssc_stepsize;
58 	u32 ssc_div_per;
59 };
60 
61 struct pll_10nm_cached_state {
62 	unsigned long vco_rate;
63 	u8 bit_clk_div;
64 	u8 pix_clk_div;
65 	u8 pll_out_div;
66 	u8 pll_mux;
67 };
68 
69 struct dsi_pll_10nm {
70 	struct clk_hw clk_hw;
71 
72 	struct msm_dsi_phy *phy;
73 
74 	u64 vco_current_rate;
75 
76 	/* protects REG_DSI_10nm_PHY_CMN_CLK_CFG0 register */
77 	spinlock_t postdiv_lock;
78 
79 	struct pll_10nm_cached_state cached_state;
80 
81 	struct dsi_pll_10nm *slave;
82 };
83 
84 #define to_pll_10nm(x)	container_of(x, struct dsi_pll_10nm, clk_hw)
85 
86 /**
87  * struct dsi_phy_10nm_tuning_cfg - Holds 10nm PHY tuning config parameters.
88  * @rescode_offset_top: Offset for pull-up legs rescode.
89  * @rescode_offset_bot: Offset for pull-down legs rescode.
90  * @vreg_ctrl: vreg ctrl to drive LDO level
91  */
92 struct dsi_phy_10nm_tuning_cfg {
93 	u8 rescode_offset_top[DSI_LANE_MAX];
94 	u8 rescode_offset_bot[DSI_LANE_MAX];
95 	u8 vreg_ctrl;
96 };
97 
98 /*
99  * Global list of private DSI PLL struct pointers. We need this for bonded DSI
100  * mode, where the master PLL's clk_ops needs access the slave's private data
101  */
102 static struct dsi_pll_10nm *pll_10nm_list[DSI_MAX];
103 
dsi_pll_setup_config(struct dsi_pll_config * config)104 static void dsi_pll_setup_config(struct dsi_pll_config *config)
105 {
106 	config->ssc_freq = 31500;
107 	config->ssc_offset = 5000;
108 	config->ssc_adj_per = 2;
109 
110 	config->enable_ssc = false;
111 	config->ssc_center = false;
112 }
113 
dsi_pll_calc_dec_frac(struct dsi_pll_10nm * pll,struct dsi_pll_config * config)114 static void dsi_pll_calc_dec_frac(struct dsi_pll_10nm *pll, struct dsi_pll_config *config)
115 {
116 	u64 fref = VCO_REF_CLK_RATE;
117 	u64 pll_freq;
118 	u64 divider;
119 	u64 dec, dec_multiple;
120 	u32 frac;
121 	u64 multiplier;
122 
123 	pll_freq = pll->vco_current_rate;
124 
125 	divider = fref * 2;
126 
127 	multiplier = 1 << FRAC_BITS;
128 	dec_multiple = div_u64(pll_freq * multiplier, divider);
129 	dec = div_u64_rem(dec_multiple, multiplier, &frac);
130 
131 	if (pll_freq <= 1900000000UL)
132 		config->pll_prop_gain_rate = 8;
133 	else if (pll_freq <= 3000000000UL)
134 		config->pll_prop_gain_rate = 10;
135 	else
136 		config->pll_prop_gain_rate = 12;
137 	if (pll_freq < 1100000000UL)
138 		config->pll_clock_inverters = 8;
139 	else
140 		config->pll_clock_inverters = 0;
141 
142 	config->decimal_div_start = dec;
143 	config->frac_div_start = frac;
144 }
145 
146 #define SSC_CENTER		BIT(0)
147 #define SSC_EN			BIT(1)
148 
dsi_pll_calc_ssc(struct dsi_pll_10nm * pll,struct dsi_pll_config * config)149 static void dsi_pll_calc_ssc(struct dsi_pll_10nm *pll, struct dsi_pll_config *config)
150 {
151 	u32 ssc_per;
152 	u32 ssc_mod;
153 	u64 ssc_step_size;
154 	u64 frac;
155 
156 	if (!config->enable_ssc) {
157 		DBG("SSC not enabled\n");
158 		return;
159 	}
160 
161 	ssc_per = DIV_ROUND_CLOSEST(VCO_REF_CLK_RATE, config->ssc_freq) / 2 - 1;
162 	ssc_mod = (ssc_per + 1) % (config->ssc_adj_per + 1);
163 	ssc_per -= ssc_mod;
164 
165 	frac = config->frac_div_start;
166 	ssc_step_size = config->decimal_div_start;
167 	ssc_step_size *= (1 << FRAC_BITS);
168 	ssc_step_size += frac;
169 	ssc_step_size *= config->ssc_offset;
170 	ssc_step_size *= (config->ssc_adj_per + 1);
171 	ssc_step_size = div_u64(ssc_step_size, (ssc_per + 1));
172 	ssc_step_size = DIV_ROUND_CLOSEST_ULL(ssc_step_size, 1000000);
173 
174 	config->ssc_div_per = ssc_per;
175 	config->ssc_stepsize = ssc_step_size;
176 
177 	pr_debug("SCC: Dec:%d, frac:%llu, frac_bits:%d\n",
178 		 config->decimal_div_start, frac, FRAC_BITS);
179 	pr_debug("SSC: div_per:0x%X, stepsize:0x%X, adjper:0x%X\n",
180 		 ssc_per, (u32)ssc_step_size, config->ssc_adj_per);
181 }
182 
dsi_pll_ssc_commit(struct dsi_pll_10nm * pll,struct dsi_pll_config * config)183 static void dsi_pll_ssc_commit(struct dsi_pll_10nm *pll, struct dsi_pll_config *config)
184 {
185 	void __iomem *base = pll->phy->pll_base;
186 
187 	if (config->enable_ssc) {
188 		pr_debug("SSC is enabled\n");
189 
190 		dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_SSC_STEPSIZE_LOW_1,
191 			      config->ssc_stepsize & 0xff);
192 		dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_SSC_STEPSIZE_HIGH_1,
193 			      config->ssc_stepsize >> 8);
194 		dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_SSC_DIV_PER_LOW_1,
195 			      config->ssc_div_per & 0xff);
196 		dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_SSC_DIV_PER_HIGH_1,
197 			      config->ssc_div_per >> 8);
198 		dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_SSC_DIV_ADJPER_LOW_1,
199 			      config->ssc_adj_per & 0xff);
200 		dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_SSC_DIV_ADJPER_HIGH_1,
201 			      config->ssc_adj_per >> 8);
202 		dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_SSC_CONTROL,
203 			      SSC_EN | (config->ssc_center ? SSC_CENTER : 0));
204 	}
205 }
206 
dsi_pll_config_hzindep_reg(struct dsi_pll_10nm * pll)207 static void dsi_pll_config_hzindep_reg(struct dsi_pll_10nm *pll)
208 {
209 	void __iomem *base = pll->phy->pll_base;
210 
211 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_ANALOG_CONTROLS_ONE, 0x80);
212 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_ANALOG_CONTROLS_TWO, 0x03);
213 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_ANALOG_CONTROLS_THREE, 0x00);
214 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_DSM_DIVIDER, 0x00);
215 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_FEEDBACK_DIVIDER, 0x4e);
216 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_CALIBRATION_SETTINGS, 0x40);
217 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_BAND_SEL_CAL_SETTINGS_THREE,
218 		      0xba);
219 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_FREQ_DETECT_SETTINGS_ONE,
220 		      0x0c);
221 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_OUTDIV, 0x00);
222 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_CORE_OVERRIDE, 0x00);
223 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_PLL_DIGITAL_TIMERS_TWO,
224 		      0x08);
225 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_PLL_PROP_GAIN_RATE_1, 0x08);
226 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_PLL_BAND_SET_RATE_1, 0xc0);
227 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_PLL_INT_GAIN_IFILT_BAND_1,
228 		      0xfa);
229 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_PLL_FL_INT_GAIN_PFILT_BAND_1,
230 		      0x4c);
231 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_PLL_LOCK_OVERRIDE, 0x80);
232 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_PFILT, 0x29);
233 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_IFILT, 0x3f);
234 }
235 
dsi_pll_commit(struct dsi_pll_10nm * pll,struct dsi_pll_config * config)236 static void dsi_pll_commit(struct dsi_pll_10nm *pll, struct dsi_pll_config *config)
237 {
238 	void __iomem *base = pll->phy->pll_base;
239 
240 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_CORE_INPUT_OVERRIDE, 0x12);
241 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_DECIMAL_DIV_START_1,
242 		      config->decimal_div_start);
243 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_FRAC_DIV_START_LOW_1,
244 		      config->frac_div_start & 0xff);
245 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_FRAC_DIV_START_MID_1,
246 		      (config->frac_div_start & 0xff00) >> 8);
247 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_FRAC_DIV_START_HIGH_1,
248 		      (config->frac_div_start & 0x30000) >> 16);
249 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_PLL_LOCKDET_RATE_1, 64);
250 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_PLL_LOCK_DELAY, 0x06);
251 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_CMODE, 0x10);
252 	dsi_phy_write(base + REG_DSI_10nm_PHY_PLL_CLOCK_INVERTERS,
253 		      config->pll_clock_inverters);
254 }
255 
dsi_pll_10nm_vco_set_rate(struct clk_hw * hw,unsigned long rate,unsigned long parent_rate)256 static int dsi_pll_10nm_vco_set_rate(struct clk_hw *hw, unsigned long rate,
257 				     unsigned long parent_rate)
258 {
259 	struct dsi_pll_10nm *pll_10nm = to_pll_10nm(hw);
260 	struct dsi_pll_config config;
261 
262 	DBG("DSI PLL%d rate=%lu, parent's=%lu", pll_10nm->phy->id, rate,
263 	    parent_rate);
264 
265 	pll_10nm->vco_current_rate = rate;
266 
267 	dsi_pll_setup_config(&config);
268 
269 	dsi_pll_calc_dec_frac(pll_10nm, &config);
270 
271 	dsi_pll_calc_ssc(pll_10nm, &config);
272 
273 	dsi_pll_commit(pll_10nm, &config);
274 
275 	dsi_pll_config_hzindep_reg(pll_10nm);
276 
277 	dsi_pll_ssc_commit(pll_10nm, &config);
278 
279 	/* flush, ensure all register writes are done*/
280 	wmb();
281 
282 	return 0;
283 }
284 
dsi_pll_10nm_lock_status(struct dsi_pll_10nm * pll)285 static int dsi_pll_10nm_lock_status(struct dsi_pll_10nm *pll)
286 {
287 	struct device *dev = &pll->phy->pdev->dev;
288 	int rc;
289 	u32 status = 0;
290 	u32 const delay_us = 100;
291 	u32 const timeout_us = 5000;
292 
293 	rc = readl_poll_timeout_atomic(pll->phy->pll_base +
294 				       REG_DSI_10nm_PHY_PLL_COMMON_STATUS_ONE,
295 				       status,
296 				       ((status & BIT(0)) > 0),
297 				       delay_us,
298 				       timeout_us);
299 	if (rc)
300 		DRM_DEV_ERROR(dev, "DSI PLL(%d) lock failed, status=0x%08x\n",
301 			      pll->phy->id, status);
302 
303 	return rc;
304 }
305 
dsi_pll_disable_pll_bias(struct dsi_pll_10nm * pll)306 static void dsi_pll_disable_pll_bias(struct dsi_pll_10nm *pll)
307 {
308 	u32 data = dsi_phy_read(pll->phy->base + REG_DSI_10nm_PHY_CMN_CTRL_0);
309 
310 	dsi_phy_write(pll->phy->pll_base + REG_DSI_10nm_PHY_PLL_SYSTEM_MUXES, 0);
311 	dsi_phy_write(pll->phy->base + REG_DSI_10nm_PHY_CMN_CTRL_0,
312 		      data & ~BIT(5));
313 	ndelay(250);
314 }
315 
dsi_pll_enable_pll_bias(struct dsi_pll_10nm * pll)316 static void dsi_pll_enable_pll_bias(struct dsi_pll_10nm *pll)
317 {
318 	u32 data = dsi_phy_read(pll->phy->base + REG_DSI_10nm_PHY_CMN_CTRL_0);
319 
320 	dsi_phy_write(pll->phy->base + REG_DSI_10nm_PHY_CMN_CTRL_0,
321 		      data | BIT(5));
322 	dsi_phy_write(pll->phy->pll_base + REG_DSI_10nm_PHY_PLL_SYSTEM_MUXES, 0xc0);
323 	ndelay(250);
324 }
325 
dsi_pll_disable_global_clk(struct dsi_pll_10nm * pll)326 static void dsi_pll_disable_global_clk(struct dsi_pll_10nm *pll)
327 {
328 	u32 data;
329 
330 	data = dsi_phy_read(pll->phy->base + REG_DSI_10nm_PHY_CMN_CLK_CFG1);
331 	dsi_phy_write(pll->phy->base + REG_DSI_10nm_PHY_CMN_CLK_CFG1,
332 		      data & ~BIT(5));
333 }
334 
dsi_pll_enable_global_clk(struct dsi_pll_10nm * pll)335 static void dsi_pll_enable_global_clk(struct dsi_pll_10nm *pll)
336 {
337 	u32 data;
338 
339 	data = dsi_phy_read(pll->phy->base + REG_DSI_10nm_PHY_CMN_CLK_CFG1);
340 	dsi_phy_write(pll->phy->base + REG_DSI_10nm_PHY_CMN_CLK_CFG1,
341 		      data | BIT(5));
342 }
343 
dsi_pll_10nm_vco_prepare(struct clk_hw * hw)344 static int dsi_pll_10nm_vco_prepare(struct clk_hw *hw)
345 {
346 	struct dsi_pll_10nm *pll_10nm = to_pll_10nm(hw);
347 	struct device *dev = &pll_10nm->phy->pdev->dev;
348 	int rc;
349 
350 	dsi_pll_enable_pll_bias(pll_10nm);
351 	if (pll_10nm->slave)
352 		dsi_pll_enable_pll_bias(pll_10nm->slave);
353 
354 	rc = dsi_pll_10nm_vco_set_rate(hw,pll_10nm->vco_current_rate, 0);
355 	if (rc) {
356 		DRM_DEV_ERROR(dev, "vco_set_rate failed, rc=%d\n", rc);
357 		return rc;
358 	}
359 
360 	/* Start PLL */
361 	dsi_phy_write(pll_10nm->phy->base + REG_DSI_10nm_PHY_CMN_PLL_CNTRL,
362 		      0x01);
363 
364 	/*
365 	 * ensure all PLL configurations are written prior to checking
366 	 * for PLL lock.
367 	 */
368 	wmb();
369 
370 	/* Check for PLL lock */
371 	rc = dsi_pll_10nm_lock_status(pll_10nm);
372 	if (rc) {
373 		DRM_DEV_ERROR(dev, "PLL(%d) lock failed\n", pll_10nm->phy->id);
374 		goto error;
375 	}
376 
377 	pll_10nm->phy->pll_on = true;
378 
379 	dsi_pll_enable_global_clk(pll_10nm);
380 	if (pll_10nm->slave)
381 		dsi_pll_enable_global_clk(pll_10nm->slave);
382 
383 	dsi_phy_write(pll_10nm->phy->base + REG_DSI_10nm_PHY_CMN_RBUF_CTRL,
384 		      0x01);
385 	if (pll_10nm->slave)
386 		dsi_phy_write(pll_10nm->slave->phy->base +
387 			      REG_DSI_10nm_PHY_CMN_RBUF_CTRL, 0x01);
388 
389 error:
390 	return rc;
391 }
392 
dsi_pll_disable_sub(struct dsi_pll_10nm * pll)393 static void dsi_pll_disable_sub(struct dsi_pll_10nm *pll)
394 {
395 	dsi_phy_write(pll->phy->base + REG_DSI_10nm_PHY_CMN_RBUF_CTRL, 0);
396 	dsi_pll_disable_pll_bias(pll);
397 }
398 
dsi_pll_10nm_vco_unprepare(struct clk_hw * hw)399 static void dsi_pll_10nm_vco_unprepare(struct clk_hw *hw)
400 {
401 	struct dsi_pll_10nm *pll_10nm = to_pll_10nm(hw);
402 
403 	/*
404 	 * To avoid any stray glitches while abruptly powering down the PLL
405 	 * make sure to gate the clock using the clock enable bit before
406 	 * powering down the PLL
407 	 */
408 	dsi_pll_disable_global_clk(pll_10nm);
409 	dsi_phy_write(pll_10nm->phy->base + REG_DSI_10nm_PHY_CMN_PLL_CNTRL, 0);
410 	dsi_pll_disable_sub(pll_10nm);
411 	if (pll_10nm->slave) {
412 		dsi_pll_disable_global_clk(pll_10nm->slave);
413 		dsi_pll_disable_sub(pll_10nm->slave);
414 	}
415 	/* flush, ensure all register writes are done */
416 	wmb();
417 	pll_10nm->phy->pll_on = false;
418 }
419 
dsi_pll_10nm_vco_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)420 static unsigned long dsi_pll_10nm_vco_recalc_rate(struct clk_hw *hw,
421 						  unsigned long parent_rate)
422 {
423 	struct dsi_pll_10nm *pll_10nm = to_pll_10nm(hw);
424 	void __iomem *base = pll_10nm->phy->pll_base;
425 	u64 ref_clk = VCO_REF_CLK_RATE;
426 	u64 vco_rate = 0x0;
427 	u64 multiplier;
428 	u32 frac;
429 	u32 dec;
430 	u64 pll_freq, tmp64;
431 
432 	dec = dsi_phy_read(base + REG_DSI_10nm_PHY_PLL_DECIMAL_DIV_START_1);
433 	dec &= 0xff;
434 
435 	frac = dsi_phy_read(base + REG_DSI_10nm_PHY_PLL_FRAC_DIV_START_LOW_1);
436 	frac |= ((dsi_phy_read(base + REG_DSI_10nm_PHY_PLL_FRAC_DIV_START_MID_1) &
437 		  0xff) << 8);
438 	frac |= ((dsi_phy_read(base + REG_DSI_10nm_PHY_PLL_FRAC_DIV_START_HIGH_1) &
439 		  0x3) << 16);
440 
441 	/*
442 	 * TODO:
443 	 *	1. Assumes prescaler is disabled
444 	 */
445 	multiplier = 1 << FRAC_BITS;
446 	pll_freq = dec * (ref_clk * 2);
447 	tmp64 = (ref_clk * 2 * frac);
448 	pll_freq += div_u64(tmp64, multiplier);
449 
450 	vco_rate = pll_freq;
451 	pll_10nm->vco_current_rate = vco_rate;
452 
453 	DBG("DSI PLL%d returning vco rate = %lu, dec = %x, frac = %x",
454 	    pll_10nm->phy->id, (unsigned long)vco_rate, dec, frac);
455 
456 	return (unsigned long)vco_rate;
457 }
458 
dsi_pll_10nm_clk_round_rate(struct clk_hw * hw,unsigned long rate,unsigned long * parent_rate)459 static long dsi_pll_10nm_clk_round_rate(struct clk_hw *hw,
460 		unsigned long rate, unsigned long *parent_rate)
461 {
462 	struct dsi_pll_10nm *pll_10nm = to_pll_10nm(hw);
463 
464 	if      (rate < pll_10nm->phy->cfg->min_pll_rate)
465 		return  pll_10nm->phy->cfg->min_pll_rate;
466 	else if (rate > pll_10nm->phy->cfg->max_pll_rate)
467 		return  pll_10nm->phy->cfg->max_pll_rate;
468 	else
469 		return rate;
470 }
471 
472 static const struct clk_ops clk_ops_dsi_pll_10nm_vco = {
473 	.round_rate = dsi_pll_10nm_clk_round_rate,
474 	.set_rate = dsi_pll_10nm_vco_set_rate,
475 	.recalc_rate = dsi_pll_10nm_vco_recalc_rate,
476 	.prepare = dsi_pll_10nm_vco_prepare,
477 	.unprepare = dsi_pll_10nm_vco_unprepare,
478 };
479 
480 /*
481  * PLL Callbacks
482  */
483 
dsi_10nm_pll_save_state(struct msm_dsi_phy * phy)484 static void dsi_10nm_pll_save_state(struct msm_dsi_phy *phy)
485 {
486 	struct dsi_pll_10nm *pll_10nm = to_pll_10nm(phy->vco_hw);
487 	struct pll_10nm_cached_state *cached = &pll_10nm->cached_state;
488 	void __iomem *phy_base = pll_10nm->phy->base;
489 	u32 cmn_clk_cfg0, cmn_clk_cfg1;
490 
491 	cached->pll_out_div = dsi_phy_read(pll_10nm->phy->pll_base +
492 			REG_DSI_10nm_PHY_PLL_PLL_OUTDIV_RATE);
493 	cached->pll_out_div &= 0x3;
494 
495 	cmn_clk_cfg0 = dsi_phy_read(phy_base + REG_DSI_10nm_PHY_CMN_CLK_CFG0);
496 	cached->bit_clk_div = cmn_clk_cfg0 & 0xf;
497 	cached->pix_clk_div = (cmn_clk_cfg0 & 0xf0) >> 4;
498 
499 	cmn_clk_cfg1 = dsi_phy_read(phy_base + REG_DSI_10nm_PHY_CMN_CLK_CFG1);
500 	cached->pll_mux = cmn_clk_cfg1 & 0x3;
501 
502 	DBG("DSI PLL%d outdiv %x bit_clk_div %x pix_clk_div %x pll_mux %x",
503 	    pll_10nm->phy->id, cached->pll_out_div, cached->bit_clk_div,
504 	    cached->pix_clk_div, cached->pll_mux);
505 }
506 
dsi_10nm_pll_restore_state(struct msm_dsi_phy * phy)507 static int dsi_10nm_pll_restore_state(struct msm_dsi_phy *phy)
508 {
509 	struct dsi_pll_10nm *pll_10nm = to_pll_10nm(phy->vco_hw);
510 	struct pll_10nm_cached_state *cached = &pll_10nm->cached_state;
511 	void __iomem *phy_base = pll_10nm->phy->base;
512 	u32 val;
513 	int ret;
514 
515 	val = dsi_phy_read(pll_10nm->phy->pll_base + REG_DSI_10nm_PHY_PLL_PLL_OUTDIV_RATE);
516 	val &= ~0x3;
517 	val |= cached->pll_out_div;
518 	dsi_phy_write(pll_10nm->phy->pll_base + REG_DSI_10nm_PHY_PLL_PLL_OUTDIV_RATE, val);
519 
520 	dsi_phy_write(phy_base + REG_DSI_10nm_PHY_CMN_CLK_CFG0,
521 		      cached->bit_clk_div | (cached->pix_clk_div << 4));
522 
523 	val = dsi_phy_read(phy_base + REG_DSI_10nm_PHY_CMN_CLK_CFG1);
524 	val &= ~0x3;
525 	val |= cached->pll_mux;
526 	dsi_phy_write(phy_base + REG_DSI_10nm_PHY_CMN_CLK_CFG1, val);
527 
528 	ret = dsi_pll_10nm_vco_set_rate(phy->vco_hw,
529 			pll_10nm->vco_current_rate,
530 			VCO_REF_CLK_RATE);
531 	if (ret) {
532 		DRM_DEV_ERROR(&pll_10nm->phy->pdev->dev,
533 			"restore vco rate failed. ret=%d\n", ret);
534 		return ret;
535 	}
536 
537 	DBG("DSI PLL%d", pll_10nm->phy->id);
538 
539 	return 0;
540 }
541 
dsi_10nm_set_usecase(struct msm_dsi_phy * phy)542 static int dsi_10nm_set_usecase(struct msm_dsi_phy *phy)
543 {
544 	struct dsi_pll_10nm *pll_10nm = to_pll_10nm(phy->vco_hw);
545 	void __iomem *base = phy->base;
546 	u32 data = 0x0;	/* internal PLL */
547 
548 	DBG("DSI PLL%d", pll_10nm->phy->id);
549 
550 	switch (phy->usecase) {
551 	case MSM_DSI_PHY_STANDALONE:
552 		break;
553 	case MSM_DSI_PHY_MASTER:
554 		pll_10nm->slave = pll_10nm_list[(pll_10nm->phy->id + 1) % DSI_MAX];
555 		break;
556 	case MSM_DSI_PHY_SLAVE:
557 		data = 0x1; /* external PLL */
558 		break;
559 	default:
560 		return -EINVAL;
561 	}
562 
563 	/* set PLL src */
564 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CLK_CFG1, (data << 2));
565 
566 	return 0;
567 }
568 
569 /*
570  * The post dividers and mux clocks are created using the standard divider and
571  * mux API. Unlike the 14nm PHY, the slave PLL doesn't need its dividers/mux
572  * state to follow the master PLL's divider/mux state. Therefore, we don't
573  * require special clock ops that also configure the slave PLL registers
574  */
pll_10nm_register(struct dsi_pll_10nm * pll_10nm,struct clk_hw ** provided_clocks)575 static int pll_10nm_register(struct dsi_pll_10nm *pll_10nm, struct clk_hw **provided_clocks)
576 {
577 	char clk_name[32];
578 	struct clk_init_data vco_init = {
579 		.parent_data = &(const struct clk_parent_data) {
580 			.fw_name = "ref",
581 		},
582 		.num_parents = 1,
583 		.name = clk_name,
584 		.flags = CLK_IGNORE_UNUSED,
585 		.ops = &clk_ops_dsi_pll_10nm_vco,
586 	};
587 	struct device *dev = &pll_10nm->phy->pdev->dev;
588 	struct clk_hw *hw, *pll_out_div, *pll_bit, *pll_by_2_bit;
589 	struct clk_hw *pll_post_out_div, *pclk_mux;
590 	int ret;
591 
592 	DBG("DSI%d", pll_10nm->phy->id);
593 
594 	snprintf(clk_name, sizeof(clk_name), "dsi%dvco_clk", pll_10nm->phy->id);
595 	pll_10nm->clk_hw.init = &vco_init;
596 
597 	ret = devm_clk_hw_register(dev, &pll_10nm->clk_hw);
598 	if (ret)
599 		return ret;
600 
601 	snprintf(clk_name, sizeof(clk_name), "dsi%d_pll_out_div_clk", pll_10nm->phy->id);
602 
603 	pll_out_div = devm_clk_hw_register_divider_parent_hw(dev, clk_name,
604 			&pll_10nm->clk_hw, CLK_SET_RATE_PARENT,
605 			pll_10nm->phy->pll_base +
606 				REG_DSI_10nm_PHY_PLL_PLL_OUTDIV_RATE,
607 			0, 2, CLK_DIVIDER_POWER_OF_TWO, NULL);
608 	if (IS_ERR(pll_out_div)) {
609 		ret = PTR_ERR(pll_out_div);
610 		goto fail;
611 	}
612 
613 	snprintf(clk_name, sizeof(clk_name), "dsi%d_pll_bit_clk", pll_10nm->phy->id);
614 
615 	/* BIT CLK: DIV_CTRL_3_0 */
616 	pll_bit = devm_clk_hw_register_divider_parent_hw(dev, clk_name,
617 			pll_out_div, CLK_SET_RATE_PARENT,
618 			pll_10nm->phy->base + REG_DSI_10nm_PHY_CMN_CLK_CFG0,
619 			0, 4, CLK_DIVIDER_ONE_BASED, &pll_10nm->postdiv_lock);
620 	if (IS_ERR(pll_bit)) {
621 		ret = PTR_ERR(pll_bit);
622 		goto fail;
623 	}
624 
625 	snprintf(clk_name, sizeof(clk_name), "dsi%d_phy_pll_out_byteclk", pll_10nm->phy->id);
626 
627 	/* DSI Byte clock = VCO_CLK / OUT_DIV / BIT_DIV / 8 */
628 	hw = devm_clk_hw_register_fixed_factor_parent_hw(dev, clk_name,
629 			pll_bit, CLK_SET_RATE_PARENT, 1, 8);
630 	if (IS_ERR(hw)) {
631 		ret = PTR_ERR(hw);
632 		goto fail;
633 	}
634 
635 	provided_clocks[DSI_BYTE_PLL_CLK] = hw;
636 
637 	snprintf(clk_name, sizeof(clk_name), "dsi%d_pll_by_2_bit_clk", pll_10nm->phy->id);
638 
639 	pll_by_2_bit = devm_clk_hw_register_fixed_factor_parent_hw(dev,
640 			clk_name, pll_bit, 0, 1, 2);
641 	if (IS_ERR(pll_by_2_bit)) {
642 		ret = PTR_ERR(pll_by_2_bit);
643 		goto fail;
644 	}
645 
646 	snprintf(clk_name, sizeof(clk_name), "dsi%d_pll_post_out_div_clk", pll_10nm->phy->id);
647 
648 	pll_post_out_div = devm_clk_hw_register_fixed_factor_parent_hw(dev,
649 			clk_name, pll_out_div, 0, 1, 4);
650 	if (IS_ERR(pll_post_out_div)) {
651 		ret = PTR_ERR(pll_post_out_div);
652 		goto fail;
653 	}
654 
655 	snprintf(clk_name, sizeof(clk_name), "dsi%d_pclk_mux", pll_10nm->phy->id);
656 
657 	pclk_mux = devm_clk_hw_register_mux_parent_hws(dev, clk_name,
658 			((const struct clk_hw *[]){
659 				pll_bit,
660 				pll_by_2_bit,
661 				pll_out_div,
662 				pll_post_out_div,
663 			}), 4, 0, pll_10nm->phy->base +
664 				REG_DSI_10nm_PHY_CMN_CLK_CFG1, 0, 2, 0, NULL);
665 	if (IS_ERR(pclk_mux)) {
666 		ret = PTR_ERR(pclk_mux);
667 		goto fail;
668 	}
669 
670 	snprintf(clk_name, sizeof(clk_name), "dsi%d_phy_pll_out_dsiclk", pll_10nm->phy->id);
671 
672 	/* PIX CLK DIV : DIV_CTRL_7_4*/
673 	hw = devm_clk_hw_register_divider_parent_hw(dev, clk_name, pclk_mux,
674 			0, pll_10nm->phy->base + REG_DSI_10nm_PHY_CMN_CLK_CFG0,
675 			4, 4, CLK_DIVIDER_ONE_BASED, &pll_10nm->postdiv_lock);
676 	if (IS_ERR(hw)) {
677 		ret = PTR_ERR(hw);
678 		goto fail;
679 	}
680 
681 	provided_clocks[DSI_PIXEL_PLL_CLK] = hw;
682 
683 	return 0;
684 
685 fail:
686 
687 	return ret;
688 }
689 
dsi_pll_10nm_init(struct msm_dsi_phy * phy)690 static int dsi_pll_10nm_init(struct msm_dsi_phy *phy)
691 {
692 	struct platform_device *pdev = phy->pdev;
693 	struct dsi_pll_10nm *pll_10nm;
694 	int ret;
695 
696 	pll_10nm = devm_kzalloc(&pdev->dev, sizeof(*pll_10nm), GFP_KERNEL);
697 	if (!pll_10nm)
698 		return -ENOMEM;
699 
700 	DBG("DSI PLL%d", phy->id);
701 
702 	pll_10nm_list[phy->id] = pll_10nm;
703 
704 	spin_lock_init(&pll_10nm->postdiv_lock);
705 
706 	pll_10nm->phy = phy;
707 
708 	ret = pll_10nm_register(pll_10nm, phy->provided_clocks->hws);
709 	if (ret) {
710 		DRM_DEV_ERROR(&pdev->dev, "failed to register PLL: %d\n", ret);
711 		return ret;
712 	}
713 
714 	phy->vco_hw = &pll_10nm->clk_hw;
715 
716 	/* TODO: Remove this when we have proper display handover support */
717 	msm_dsi_phy_pll_save_state(phy);
718 
719 	return 0;
720 }
721 
dsi_phy_hw_v3_0_is_pll_on(struct msm_dsi_phy * phy)722 static int dsi_phy_hw_v3_0_is_pll_on(struct msm_dsi_phy *phy)
723 {
724 	void __iomem *base = phy->base;
725 	u32 data = 0;
726 
727 	data = dsi_phy_read(base + REG_DSI_10nm_PHY_CMN_PLL_CNTRL);
728 	mb(); /* make sure read happened */
729 
730 	return (data & BIT(0));
731 }
732 
dsi_phy_hw_v3_0_config_lpcdrx(struct msm_dsi_phy * phy,bool enable)733 static void dsi_phy_hw_v3_0_config_lpcdrx(struct msm_dsi_phy *phy, bool enable)
734 {
735 	void __iomem *lane_base = phy->lane_base;
736 	int phy_lane_0 = 0;	/* TODO: Support all lane swap configs */
737 
738 	/*
739 	 * LPRX and CDRX need to enabled only for physical data lane
740 	 * corresponding to the logical data lane 0
741 	 */
742 	if (enable)
743 		dsi_phy_write(lane_base +
744 			      REG_DSI_10nm_PHY_LN_LPRX_CTRL(phy_lane_0), 0x3);
745 	else
746 		dsi_phy_write(lane_base +
747 			      REG_DSI_10nm_PHY_LN_LPRX_CTRL(phy_lane_0), 0);
748 }
749 
dsi_phy_hw_v3_0_lane_settings(struct msm_dsi_phy * phy)750 static void dsi_phy_hw_v3_0_lane_settings(struct msm_dsi_phy *phy)
751 {
752 	int i;
753 	u8 tx_dctrl[] = { 0x00, 0x00, 0x00, 0x04, 0x01 };
754 	void __iomem *lane_base = phy->lane_base;
755 	struct dsi_phy_10nm_tuning_cfg *tuning_cfg = phy->tuning_cfg;
756 
757 	if (phy->cfg->quirks & DSI_PHY_10NM_QUIRK_OLD_TIMINGS)
758 		tx_dctrl[3] = 0x02;
759 
760 	/* Strength ctrl settings */
761 	for (i = 0; i < 5; i++) {
762 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_LPTX_STR_CTRL(i),
763 			      0x55);
764 		/*
765 		 * Disable LPRX and CDRX for all lanes. And later on, it will
766 		 * be only enabled for the physical data lane corresponding
767 		 * to the logical data lane 0
768 		 */
769 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_LPRX_CTRL(i), 0);
770 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_PIN_SWAP(i), 0x0);
771 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_HSTX_STR_CTRL(i),
772 			      0x88);
773 	}
774 
775 	dsi_phy_hw_v3_0_config_lpcdrx(phy, true);
776 
777 	/* other settings */
778 	for (i = 0; i < 5; i++) {
779 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_CFG0(i), 0x0);
780 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_CFG1(i), 0x0);
781 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_CFG2(i), 0x0);
782 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_CFG3(i),
783 			      i == 4 ? 0x80 : 0x0);
784 
785 		/* platform specific dsi phy drive strength adjustment */
786 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_OFFSET_TOP_CTRL(i),
787 				tuning_cfg->rescode_offset_top[i]);
788 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_OFFSET_BOT_CTRL(i),
789 				tuning_cfg->rescode_offset_bot[i]);
790 
791 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_TX_DCTRL(i),
792 			      tx_dctrl[i]);
793 	}
794 
795 	if (!(phy->cfg->quirks & DSI_PHY_10NM_QUIRK_OLD_TIMINGS)) {
796 		/* Toggle BIT 0 to release freeze I/0 */
797 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_TX_DCTRL(3), 0x05);
798 		dsi_phy_write(lane_base + REG_DSI_10nm_PHY_LN_TX_DCTRL(3), 0x04);
799 	}
800 }
801 
dsi_10nm_phy_enable(struct msm_dsi_phy * phy,struct msm_dsi_phy_clk_request * clk_req)802 static int dsi_10nm_phy_enable(struct msm_dsi_phy *phy,
803 			       struct msm_dsi_phy_clk_request *clk_req)
804 {
805 	int ret;
806 	u32 status;
807 	u32 const delay_us = 5;
808 	u32 const timeout_us = 1000;
809 	struct msm_dsi_dphy_timing *timing = &phy->timing;
810 	void __iomem *base = phy->base;
811 	struct dsi_phy_10nm_tuning_cfg *tuning_cfg = phy->tuning_cfg;
812 	u32 data;
813 
814 	DBG("");
815 
816 	if (msm_dsi_dphy_timing_calc_v3(timing, clk_req)) {
817 		DRM_DEV_ERROR(&phy->pdev->dev,
818 			"%s: D-PHY timing calculation failed\n", __func__);
819 		return -EINVAL;
820 	}
821 
822 	if (dsi_phy_hw_v3_0_is_pll_on(phy))
823 		pr_warn("PLL turned on before configuring PHY\n");
824 
825 	/* wait for REFGEN READY */
826 	ret = readl_poll_timeout_atomic(base + REG_DSI_10nm_PHY_CMN_PHY_STATUS,
827 					status, (status & BIT(0)),
828 					delay_us, timeout_us);
829 	if (ret) {
830 		pr_err("Ref gen not ready. Aborting\n");
831 		return -EINVAL;
832 	}
833 
834 	/* de-assert digital and pll power down */
835 	data = BIT(6) | BIT(5);
836 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, data);
837 
838 	/* Assert PLL core reset */
839 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_PLL_CNTRL, 0x00);
840 
841 	/* turn off resync FIFO */
842 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_RBUF_CTRL, 0x00);
843 
844 	/* Select MS1 byte-clk */
845 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_GLBL_CTRL, 0x10);
846 
847 	/* Enable LDO with platform specific drive level/amplitude adjustment */
848 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_VREG_CTRL,
849 		      tuning_cfg->vreg_ctrl);
850 
851 	/* Configure PHY lane swap (TODO: we need to calculate this) */
852 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_LANE_CFG0, 0x21);
853 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_LANE_CFG1, 0x84);
854 
855 	/* DSI PHY timings */
856 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_0,
857 		      timing->hs_halfbyte_en);
858 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_1,
859 		      timing->clk_zero);
860 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_2,
861 		      timing->clk_prepare);
862 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_3,
863 		      timing->clk_trail);
864 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_4,
865 		      timing->hs_exit);
866 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_5,
867 		      timing->hs_zero);
868 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_6,
869 		      timing->hs_prepare);
870 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_7,
871 		      timing->hs_trail);
872 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_8,
873 		      timing->hs_rqst);
874 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_9,
875 		      timing->ta_go | (timing->ta_sure << 3));
876 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_10,
877 		      timing->ta_get);
878 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_TIMING_CTRL_11,
879 		      0x00);
880 
881 	/* Remove power down from all blocks */
882 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, 0x7f);
883 
884 	/* power up lanes */
885 	data = dsi_phy_read(base + REG_DSI_10nm_PHY_CMN_CTRL_0);
886 
887 	/* TODO: only power up lanes that are used */
888 	data |= 0x1F;
889 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, data);
890 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_LANE_CTRL0, 0x1F);
891 
892 	/* Select full-rate mode */
893 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_2, 0x40);
894 
895 	ret = dsi_10nm_set_usecase(phy);
896 	if (ret) {
897 		DRM_DEV_ERROR(&phy->pdev->dev, "%s: set pll usecase failed, %d\n",
898 			__func__, ret);
899 		return ret;
900 	}
901 
902 	/* DSI lane settings */
903 	dsi_phy_hw_v3_0_lane_settings(phy);
904 
905 	DBG("DSI%d PHY enabled", phy->id);
906 
907 	return 0;
908 }
909 
dsi_10nm_phy_disable(struct msm_dsi_phy * phy)910 static void dsi_10nm_phy_disable(struct msm_dsi_phy *phy)
911 {
912 	void __iomem *base = phy->base;
913 	u32 data;
914 
915 	DBG("");
916 
917 	if (dsi_phy_hw_v3_0_is_pll_on(phy))
918 		pr_warn("Turning OFF PHY while PLL is on\n");
919 
920 	dsi_phy_hw_v3_0_config_lpcdrx(phy, false);
921 	data = dsi_phy_read(base + REG_DSI_10nm_PHY_CMN_CTRL_0);
922 
923 	/* disable all lanes */
924 	data &= ~0x1F;
925 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, data);
926 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_LANE_CTRL0, 0);
927 
928 	/* Turn off all PHY blocks */
929 	dsi_phy_write(base + REG_DSI_10nm_PHY_CMN_CTRL_0, 0x00);
930 	/* make sure phy is turned off */
931 	wmb();
932 
933 	DBG("DSI%d PHY disabled", phy->id);
934 }
935 
dsi_10nm_phy_parse_dt(struct msm_dsi_phy * phy)936 static int dsi_10nm_phy_parse_dt(struct msm_dsi_phy *phy)
937 {
938 	struct device *dev = &phy->pdev->dev;
939 	struct dsi_phy_10nm_tuning_cfg *tuning_cfg;
940 	s8 offset_top[DSI_LANE_MAX] = { 0 }; /* No offset */
941 	s8 offset_bot[DSI_LANE_MAX] = { 0 }; /* No offset */
942 	u32 ldo_level = 400; /* 400mV */
943 	u8 level;
944 	int ret, i;
945 
946 	tuning_cfg = devm_kzalloc(dev, sizeof(*tuning_cfg), GFP_KERNEL);
947 	if (!tuning_cfg)
948 		return -ENOMEM;
949 
950 	/* Drive strength adjustment parameters */
951 	ret = of_property_read_u8_array(dev->of_node, "qcom,phy-rescode-offset-top",
952 					offset_top, DSI_LANE_MAX);
953 	if (ret && ret != -EINVAL) {
954 		DRM_DEV_ERROR(dev, "failed to parse qcom,phy-rescode-offset-top, %d\n", ret);
955 		return ret;
956 	}
957 
958 	for (i = 0; i < DSI_LANE_MAX; i++) {
959 		if (offset_top[i] < -32 || offset_top[i] > 31) {
960 			DRM_DEV_ERROR(dev,
961 				"qcom,phy-rescode-offset-top value %d is not in range [-32..31]\n",
962 				offset_top[i]);
963 			return -EINVAL;
964 		}
965 		tuning_cfg->rescode_offset_top[i] = 0x3f & offset_top[i];
966 	}
967 
968 	ret = of_property_read_u8_array(dev->of_node, "qcom,phy-rescode-offset-bot",
969 					offset_bot, DSI_LANE_MAX);
970 	if (ret && ret != -EINVAL) {
971 		DRM_DEV_ERROR(dev, "failed to parse qcom,phy-rescode-offset-bot, %d\n", ret);
972 		return ret;
973 	}
974 
975 	for (i = 0; i < DSI_LANE_MAX; i++) {
976 		if (offset_bot[i] < -32 || offset_bot[i] > 31) {
977 			DRM_DEV_ERROR(dev,
978 				"qcom,phy-rescode-offset-bot value %d is not in range [-32..31]\n",
979 				offset_bot[i]);
980 			return -EINVAL;
981 		}
982 		tuning_cfg->rescode_offset_bot[i] = 0x3f & offset_bot[i];
983 	}
984 
985 	/* Drive level/amplitude adjustment parameters */
986 	ret = of_property_read_u32(dev->of_node, "qcom,phy-drive-ldo-level", &ldo_level);
987 	if (ret && ret != -EINVAL) {
988 		DRM_DEV_ERROR(dev, "failed to parse qcom,phy-drive-ldo-level, %d\n", ret);
989 		return ret;
990 	}
991 
992 	switch (ldo_level) {
993 	case 375:
994 		level = 0;
995 		break;
996 	case 400:
997 		level = 1;
998 		break;
999 	case 425:
1000 		level = 2;
1001 		break;
1002 	case 450:
1003 		level = 3;
1004 		break;
1005 	case 475:
1006 		level = 4;
1007 		break;
1008 	case 500:
1009 		level = 5;
1010 		break;
1011 	default:
1012 		DRM_DEV_ERROR(dev, "qcom,phy-drive-ldo-level %d is not supported\n", ldo_level);
1013 		return -EINVAL;
1014 	}
1015 	tuning_cfg->vreg_ctrl = 0x58 | (0x7 & level);
1016 
1017 	phy->tuning_cfg = tuning_cfg;
1018 
1019 	return 0;
1020 }
1021 
1022 static const struct regulator_bulk_data dsi_phy_10nm_regulators[] = {
1023 	{ .supply = "vdds", .init_load_uA = 36000 },
1024 };
1025 
1026 const struct msm_dsi_phy_cfg dsi_phy_10nm_cfgs = {
1027 	.has_phy_lane = true,
1028 	.regulator_data = dsi_phy_10nm_regulators,
1029 	.num_regulators = ARRAY_SIZE(dsi_phy_10nm_regulators),
1030 	.ops = {
1031 		.enable = dsi_10nm_phy_enable,
1032 		.disable = dsi_10nm_phy_disable,
1033 		.pll_init = dsi_pll_10nm_init,
1034 		.save_pll_state = dsi_10nm_pll_save_state,
1035 		.restore_pll_state = dsi_10nm_pll_restore_state,
1036 		.parse_dt_properties = dsi_10nm_phy_parse_dt,
1037 	},
1038 	.min_pll_rate = 1000000000UL,
1039 	.max_pll_rate = 3500000000UL,
1040 	.io_start = { 0xae94400, 0xae96400 },
1041 	.num_dsi_phy = 2,
1042 };
1043 
1044 const struct msm_dsi_phy_cfg dsi_phy_10nm_8998_cfgs = {
1045 	.has_phy_lane = true,
1046 	.regulator_data = dsi_phy_10nm_regulators,
1047 	.num_regulators = ARRAY_SIZE(dsi_phy_10nm_regulators),
1048 	.ops = {
1049 		.enable = dsi_10nm_phy_enable,
1050 		.disable = dsi_10nm_phy_disable,
1051 		.pll_init = dsi_pll_10nm_init,
1052 		.save_pll_state = dsi_10nm_pll_save_state,
1053 		.restore_pll_state = dsi_10nm_pll_restore_state,
1054 		.parse_dt_properties = dsi_10nm_phy_parse_dt,
1055 	},
1056 	.min_pll_rate = 1000000000UL,
1057 	.max_pll_rate = 3500000000UL,
1058 	.io_start = { 0xc994400, 0xc996400 },
1059 	.num_dsi_phy = 2,
1060 	.quirks = DSI_PHY_10NM_QUIRK_OLD_TIMINGS,
1061 };
1062