1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2016, The Linux Foundation. All rights reserved.
7 #include <linux/clk-provider.h>
8 #include <linux/delay.h>
14 #define PHY_14NM_CKLN_IDX 4
17 * DSI PLL 14nm - clock diagram (eg: DSI0):
23 * dsi0vco_clk ---| n1 |--o--| /8 |-- dsi0pllbyte
25 * | dsi0n1_postdivby2_clk
29 * | | |--| n2 |-- dsi0pll
30 * o--------------| / +----+
34 #define POLL_MAX_READS 15
35 #define POLL_TIMEOUT_US 1000
37 #define VCO_REF_CLK_RATE 19200000
38 #define VCO_MIN_RATE 1300000000UL
39 #define VCO_MAX_RATE 2600000000UL
41 #define DSI_PLL_DEFAULT_VCO_POSTDIV 1
43 struct dsi_pll_input {
44 u32 fref; /* reference clk */
45 u32 fdata; /* bit clock rate */
46 u32 dsiclk_sel; /* Mux configuration (see diagram) */
47 u32 ssc_en; /* SSC enable/disable */
53 u32 kvco_measure_time;
84 struct dsi_pll_output {
97 u32 pll_resetsm_cntrl;
98 u32 pll_resetsm_cntrl2;
99 u32 pll_resetsm_cntrl5;
110 struct pll_14nm_cached_state {
111 unsigned long vco_rate;
116 struct dsi_pll_14nm {
117 struct msm_dsi_pll base;
120 struct platform_device *pdev;
122 void __iomem *phy_cmn_mmio;
125 struct dsi_pll_input in;
126 struct dsi_pll_output out;
128 /* protects REG_DSI_14nm_PHY_CMN_CLK_CFG0 register */
129 spinlock_t postdiv_lock;
131 u64 vco_current_rate;
132 u64 vco_ref_clk_rate;
134 struct pll_14nm_cached_state cached_state;
136 enum msm_dsi_phy_usecase uc;
137 struct dsi_pll_14nm *slave;
140 #define to_pll_14nm(x) container_of(x, struct dsi_pll_14nm, base)
143 * Private struct for N1/N2 post-divider clocks. These clocks are similar to
144 * the generic clk_divider class of clocks. The only difference is that it
145 * also sets the slave DSI PLL's post-dividers if in Dual DSI mode
147 struct dsi_pll_14nm_postdiv {
153 u8 flags; /* same flags as used by clk_divider struct */
155 struct dsi_pll_14nm *pll;
158 #define to_pll_14nm_postdiv(_hw) container_of(_hw, struct dsi_pll_14nm_postdiv, hw)
161 * Global list of private DSI PLL struct pointers. We need this for Dual DSI
162 * mode, where the master PLL's clk_ops needs access the slave's private data
164 static struct dsi_pll_14nm *pll_14nm_list[DSI_MAX];
166 static bool pll_14nm_poll_for_ready(struct dsi_pll_14nm *pll_14nm,
167 u32 nb_tries, u32 timeout_us)
169 bool pll_locked = false;
170 void __iomem *base = pll_14nm->mmio;
175 val = pll_read(base +
176 REG_DSI_14nm_PHY_PLL_RESET_SM_READY_STATUS);
177 pll_locked = !!(val & BIT(5));
188 val = pll_read(base +
189 REG_DSI_14nm_PHY_PLL_RESET_SM_READY_STATUS);
190 pll_locked = !!(val & BIT(0));
199 DBG("DSI PLL is %slocked", pll_locked ? "" : "*not* ");
204 static void dsi_pll_14nm_input_init(struct dsi_pll_14nm *pll)
206 pll->in.fref = pll->vco_ref_clk_rate;
208 pll->in.dsiclk_sel = 1; /* Use the /2 path in Mux */
209 pll->in.ldo_en = 0; /* disabled for now */
212 pll->in.refclk_dbler_en = 0;
213 pll->in.vco_measure_time = 5;
214 pll->in.kvco_measure_time = 5;
215 pll->in.bandgap_timer = 4;
216 pll->in.pll_wakeup_timer = 5;
217 pll->in.plllock_cnt = 1;
218 pll->in.plllock_rng = 0;
221 * SSC is enabled by default. We might need DT props for configuring
222 * some SSC params like PPM and center/down spread etc.
225 pll->in.ssc_center = 0; /* down spread by default */
226 pll->in.ssc_spread = 5; /* PPM / 1000 */
227 pll->in.ssc_freq = 31500; /* default recommended */
228 pll->in.ssc_adj_period = 37;
230 pll->in.pll_ie_trim = 4;
231 pll->in.pll_ip_trim = 4;
232 pll->in.pll_cpcset_cur = 1;
233 pll->in.pll_cpmset_cur = 1;
234 pll->in.pll_icpmset = 4;
235 pll->in.pll_icpcset = 4;
236 pll->in.pll_icpmset_p = 0;
237 pll->in.pll_icpmset_m = 0;
238 pll->in.pll_icpcset_p = 0;
239 pll->in.pll_icpcset_m = 0;
240 pll->in.pll_lpf_res1 = 3;
241 pll->in.pll_lpf_cap1 = 11;
242 pll->in.pll_lpf_cap2 = 1;
243 pll->in.pll_iptat_trim = 7;
244 pll->in.pll_c3ctrl = 2;
245 pll->in.pll_r3ctrl = 1;
248 #define CEIL(x, y) (((x) + ((y) - 1)) / (y))
250 static void pll_14nm_ssc_calc(struct dsi_pll_14nm *pll)
252 u32 period, ssc_period;
256 DBG("vco=%lld ref=%lld", pll->vco_current_rate, pll->vco_ref_clk_rate);
258 ssc_period = pll->in.ssc_freq / 500;
259 period = (u32)pll->vco_ref_clk_rate / 1000;
260 ssc_period = CEIL(period, ssc_period);
262 pll->out.ssc_period = ssc_period;
264 DBG("ssc freq=%d spread=%d period=%d", pll->in.ssc_freq,
265 pll->in.ssc_spread, pll->out.ssc_period);
267 step_size = (u32)pll->vco_current_rate;
268 ref = pll->vco_ref_clk_rate;
270 step_size = div_u64(step_size, ref);
272 step_size = div_u64(step_size, 1000);
273 step_size *= pll->in.ssc_spread;
274 step_size = div_u64(step_size, 1000);
275 step_size *= (pll->in.ssc_adj_period + 1);
278 step_size = div_u64_rem(step_size, ssc_period + 1, &rem);
282 DBG("step_size=%lld", step_size);
284 step_size &= 0x0ffff; /* take lower 16 bits */
286 pll->out.ssc_step_size = step_size;
289 static void pll_14nm_dec_frac_calc(struct dsi_pll_14nm *pll)
291 struct dsi_pll_input *pin = &pll->in;
292 struct dsi_pll_output *pout = &pll->out;
293 u64 multiplier = BIT(20);
294 u64 dec_start_multiple, dec_start, pll_comp_val;
295 u32 duration, div_frac_start;
296 u64 vco_clk_rate = pll->vco_current_rate;
297 u64 fref = pll->vco_ref_clk_rate;
299 DBG("vco_clk_rate=%lld ref_clk_rate=%lld", vco_clk_rate, fref);
301 dec_start_multiple = div_u64(vco_clk_rate * multiplier, fref);
302 div_u64_rem(dec_start_multiple, multiplier, &div_frac_start);
304 dec_start = div_u64(dec_start_multiple, multiplier);
306 pout->dec_start = (u32)dec_start;
307 pout->div_frac_start = div_frac_start;
309 if (pin->plllock_cnt == 0)
311 else if (pin->plllock_cnt == 1)
313 else if (pin->plllock_cnt == 2)
318 pll_comp_val = duration * dec_start_multiple;
319 pll_comp_val = div_u64(pll_comp_val, multiplier);
320 do_div(pll_comp_val, 10);
322 pout->plllock_cmp = (u32)pll_comp_val;
324 pout->pll_txclk_en = 1;
325 pout->cmn_ldo_cntrl = 0x3c;
328 static u32 pll_14nm_kvco_slop(u32 vrate)
332 if (vrate > VCO_MIN_RATE && vrate <= 1800000000UL)
334 else if (vrate > 1800000000UL && vrate < 2300000000UL)
336 else if (vrate > 2300000000UL && vrate < VCO_MAX_RATE)
342 static void pll_14nm_calc_vco_count(struct dsi_pll_14nm *pll)
344 struct dsi_pll_input *pin = &pll->in;
345 struct dsi_pll_output *pout = &pll->out;
346 u64 vco_clk_rate = pll->vco_current_rate;
347 u64 fref = pll->vco_ref_clk_rate;
351 data = fref * pin->vco_measure_time;
352 do_div(data, 1000000);
353 data &= 0x03ff; /* 10 bits */
355 pout->pll_vco_div_ref = data;
357 data = div_u64(vco_clk_rate, 1000000); /* unit is Mhz */
358 data *= pin->vco_measure_time;
360 pout->pll_vco_count = data;
362 data = fref * pin->kvco_measure_time;
363 do_div(data, 1000000);
364 data &= 0x03ff; /* 10 bits */
366 pout->pll_kvco_div_ref = data;
368 cnt = pll_14nm_kvco_slop(vco_clk_rate);
371 cnt *= pin->kvco_measure_time;
372 pout->pll_kvco_count = cnt;
374 pout->pll_misc1 = 16;
375 pout->pll_resetsm_cntrl = 48;
376 pout->pll_resetsm_cntrl2 = pin->bandgap_timer << 3;
377 pout->pll_resetsm_cntrl5 = pin->pll_wakeup_timer;
378 pout->pll_kvco_code = 0;
381 static void pll_db_commit_ssc(struct dsi_pll_14nm *pll)
383 void __iomem *base = pll->mmio;
384 struct dsi_pll_input *pin = &pll->in;
385 struct dsi_pll_output *pout = &pll->out;
388 data = pin->ssc_adj_period;
390 pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_ADJ_PER1, data);
391 data = (pin->ssc_adj_period >> 8);
393 pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_ADJ_PER2, data);
395 data = pout->ssc_period;
397 pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_PER1, data);
398 data = (pout->ssc_period >> 8);
400 pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_PER2, data);
402 data = pout->ssc_step_size;
404 pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_STEP_SIZE1, data);
405 data = (pout->ssc_step_size >> 8);
407 pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_STEP_SIZE2, data);
409 data = (pin->ssc_center & 0x01);
411 data |= 0x01; /* enable */
412 pll_write(base + REG_DSI_14nm_PHY_PLL_SSC_EN_CENTER, data);
414 wmb(); /* make sure register committed */
417 static void pll_db_commit_common(struct dsi_pll_14nm *pll,
418 struct dsi_pll_input *pin,
419 struct dsi_pll_output *pout)
421 void __iomem *base = pll->mmio;
424 /* confgiure the non frequency dependent pll registers */
426 pll_write(base + REG_DSI_14nm_PHY_PLL_SYSCLK_EN_RESET, data);
428 data = pout->pll_txclk_en;
429 pll_write(base + REG_DSI_14nm_PHY_PLL_TXCLK_EN, data);
431 data = pout->pll_resetsm_cntrl;
432 pll_write(base + REG_DSI_14nm_PHY_PLL_RESETSM_CNTRL, data);
433 data = pout->pll_resetsm_cntrl2;
434 pll_write(base + REG_DSI_14nm_PHY_PLL_RESETSM_CNTRL2, data);
435 data = pout->pll_resetsm_cntrl5;
436 pll_write(base + REG_DSI_14nm_PHY_PLL_RESETSM_CNTRL5, data);
438 data = pout->pll_vco_div_ref & 0xff;
439 pll_write(base + REG_DSI_14nm_PHY_PLL_VCO_DIV_REF1, data);
440 data = (pout->pll_vco_div_ref >> 8) & 0x3;
441 pll_write(base + REG_DSI_14nm_PHY_PLL_VCO_DIV_REF2, data);
443 data = pout->pll_kvco_div_ref & 0xff;
444 pll_write(base + REG_DSI_14nm_PHY_PLL_KVCO_DIV_REF1, data);
445 data = (pout->pll_kvco_div_ref >> 8) & 0x3;
446 pll_write(base + REG_DSI_14nm_PHY_PLL_KVCO_DIV_REF2, data);
448 data = pout->pll_misc1;
449 pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_MISC1, data);
451 data = pin->pll_ie_trim;
452 pll_write(base + REG_DSI_14nm_PHY_PLL_IE_TRIM, data);
454 data = pin->pll_ip_trim;
455 pll_write(base + REG_DSI_14nm_PHY_PLL_IP_TRIM, data);
457 data = pin->pll_cpmset_cur << 3 | pin->pll_cpcset_cur;
458 pll_write(base + REG_DSI_14nm_PHY_PLL_CP_SET_CUR, data);
460 data = pin->pll_icpcset_p << 3 | pin->pll_icpcset_m;
461 pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_ICPCSET, data);
463 data = pin->pll_icpmset_p << 3 | pin->pll_icpcset_m;
464 pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_ICPMSET, data);
466 data = pin->pll_icpmset << 3 | pin->pll_icpcset;
467 pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_ICP_SET, data);
469 data = pin->pll_lpf_cap2 << 4 | pin->pll_lpf_cap1;
470 pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_LPF1, data);
472 data = pin->pll_iptat_trim;
473 pll_write(base + REG_DSI_14nm_PHY_PLL_IPTAT_TRIM, data);
475 data = pin->pll_c3ctrl | pin->pll_r3ctrl << 4;
476 pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_CRCTRL, data);
479 static void pll_14nm_software_reset(struct dsi_pll_14nm *pll_14nm)
481 void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
483 /* de assert pll start and apply pll sw reset */
486 pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 0);
489 pll_write_udelay(cmn_base + REG_DSI_14nm_PHY_CMN_CTRL_1, 0x20, 10);
490 wmb(); /* make sure register committed */
492 pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_CTRL_1, 0);
493 wmb(); /* make sure register committed */
496 static void pll_db_commit_14nm(struct dsi_pll_14nm *pll,
497 struct dsi_pll_input *pin,
498 struct dsi_pll_output *pout)
500 void __iomem *base = pll->mmio;
501 void __iomem *cmn_base = pll->phy_cmn_mmio;
504 DBG("DSI%d PLL", pll->id);
506 data = pout->cmn_ldo_cntrl;
507 pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_LDO_CNTRL, data);
509 pll_db_commit_common(pll, pin, pout);
511 pll_14nm_software_reset(pll);
513 data = pin->dsiclk_sel; /* set dsiclk_sel = 1 */
514 pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_CLK_CFG1, data);
516 data = 0xff; /* data, clk, pll normal operation */
517 pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_CTRL_0, data);
519 /* configure the frequency dependent pll registers */
520 data = pout->dec_start;
521 pll_write(base + REG_DSI_14nm_PHY_PLL_DEC_START, data);
523 data = pout->div_frac_start & 0xff;
524 pll_write(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START1, data);
525 data = (pout->div_frac_start >> 8) & 0xff;
526 pll_write(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START2, data);
527 data = (pout->div_frac_start >> 16) & 0xf;
528 pll_write(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START3, data);
530 data = pout->plllock_cmp & 0xff;
531 pll_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP1, data);
533 data = (pout->plllock_cmp >> 8) & 0xff;
534 pll_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP2, data);
536 data = (pout->plllock_cmp >> 16) & 0x3;
537 pll_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP3, data);
539 data = pin->plllock_cnt << 1 | pin->plllock_rng << 3;
540 pll_write(base + REG_DSI_14nm_PHY_PLL_PLLLOCK_CMP_EN, data);
542 data = pout->pll_vco_count & 0xff;
543 pll_write(base + REG_DSI_14nm_PHY_PLL_VCO_COUNT1, data);
544 data = (pout->pll_vco_count >> 8) & 0xff;
545 pll_write(base + REG_DSI_14nm_PHY_PLL_VCO_COUNT2, data);
547 data = pout->pll_kvco_count & 0xff;
548 pll_write(base + REG_DSI_14nm_PHY_PLL_KVCO_COUNT1, data);
549 data = (pout->pll_kvco_count >> 8) & 0x3;
550 pll_write(base + REG_DSI_14nm_PHY_PLL_KVCO_COUNT2, data);
552 data = (pout->pll_postdiv - 1) << 4 | pin->pll_lpf_res1;
553 pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_LPF2_POSTDIV, data);
556 pll_db_commit_ssc(pll);
558 wmb(); /* make sure register committed */
562 * VCO clock Callbacks
564 static int dsi_pll_14nm_vco_set_rate(struct clk_hw *hw, unsigned long rate,
565 unsigned long parent_rate)
567 struct msm_dsi_pll *pll = hw_clk_to_pll(hw);
568 struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
569 struct dsi_pll_input *pin = &pll_14nm->in;
570 struct dsi_pll_output *pout = &pll_14nm->out;
572 DBG("DSI PLL%d rate=%lu, parent's=%lu", pll_14nm->id, rate,
575 pll_14nm->vco_current_rate = rate;
576 pll_14nm->vco_ref_clk_rate = VCO_REF_CLK_RATE;
578 dsi_pll_14nm_input_init(pll_14nm);
581 * This configures the post divider internal to the VCO. It's
582 * fixed to divide by 1 for now.
584 * tx_band = pll_postdiv.
590 pout->pll_postdiv = DSI_PLL_DEFAULT_VCO_POSTDIV;
592 pll_14nm_dec_frac_calc(pll_14nm);
595 pll_14nm_ssc_calc(pll_14nm);
597 pll_14nm_calc_vco_count(pll_14nm);
599 /* commit the slave DSI PLL registers if we're master. Note that we
600 * don't lock the slave PLL. We just ensure that the PLL/PHY registers
601 * of the master and slave are identical
603 if (pll_14nm->uc == MSM_DSI_PHY_MASTER) {
604 struct dsi_pll_14nm *pll_14nm_slave = pll_14nm->slave;
606 pll_db_commit_14nm(pll_14nm_slave, pin, pout);
609 pll_db_commit_14nm(pll_14nm, pin, pout);
614 static unsigned long dsi_pll_14nm_vco_recalc_rate(struct clk_hw *hw,
615 unsigned long parent_rate)
617 struct msm_dsi_pll *pll = hw_clk_to_pll(hw);
618 struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
619 void __iomem *base = pll_14nm->mmio;
620 u64 vco_rate, multiplier = BIT(20);
623 u64 ref_clk = parent_rate;
625 dec_start = pll_read(base + REG_DSI_14nm_PHY_PLL_DEC_START);
628 DBG("dec_start = %x", dec_start);
630 div_frac_start = (pll_read(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START3)
632 div_frac_start |= (pll_read(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START2)
634 div_frac_start |= pll_read(base + REG_DSI_14nm_PHY_PLL_DIV_FRAC_START1)
637 DBG("div_frac_start = %x", div_frac_start);
639 vco_rate = ref_clk * dec_start;
641 vco_rate += ((ref_clk * div_frac_start) / multiplier);
644 * Recalculating the rate from dec_start and frac_start doesn't end up
645 * the rate we originally set. Convert the freq to KHz, round it up and
646 * convert it back to MHz.
648 vco_rate = DIV_ROUND_UP_ULL(vco_rate, 1000) * 1000;
650 DBG("returning vco rate = %lu", (unsigned long)vco_rate);
652 return (unsigned long)vco_rate;
655 static int dsi_pll_14nm_vco_prepare(struct clk_hw *hw)
657 struct msm_dsi_pll *pll = hw_clk_to_pll(hw);
658 struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
659 void __iomem *base = pll_14nm->mmio;
660 void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
665 if (unlikely(pll->pll_on))
668 pll_write(base + REG_DSI_14nm_PHY_PLL_VREF_CFG1, 0x10);
669 pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 1);
671 locked = pll_14nm_poll_for_ready(pll_14nm, POLL_MAX_READS,
674 if (unlikely(!locked)) {
675 DRM_DEV_ERROR(&pll_14nm->pdev->dev, "DSI PLL lock failed\n");
679 DBG("DSI PLL lock success");
685 static void dsi_pll_14nm_vco_unprepare(struct clk_hw *hw)
687 struct msm_dsi_pll *pll = hw_clk_to_pll(hw);
688 struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
689 void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
693 if (unlikely(!pll->pll_on))
696 pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 0);
701 static const struct clk_ops clk_ops_dsi_pll_14nm_vco = {
702 .round_rate = msm_dsi_pll_helper_clk_round_rate,
703 .set_rate = dsi_pll_14nm_vco_set_rate,
704 .recalc_rate = dsi_pll_14nm_vco_recalc_rate,
705 .prepare = dsi_pll_14nm_vco_prepare,
706 .unprepare = dsi_pll_14nm_vco_unprepare,
710 * N1 and N2 post-divider clock callbacks
712 #define div_mask(width) ((1 << (width)) - 1)
713 static unsigned long dsi_pll_14nm_postdiv_recalc_rate(struct clk_hw *hw,
714 unsigned long parent_rate)
716 struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw);
717 struct dsi_pll_14nm *pll_14nm = postdiv->pll;
718 void __iomem *base = pll_14nm->phy_cmn_mmio;
719 u8 shift = postdiv->shift;
720 u8 width = postdiv->width;
723 DBG("DSI%d PLL parent rate=%lu", pll_14nm->id, parent_rate);
725 val = pll_read(base + REG_DSI_14nm_PHY_CMN_CLK_CFG0) >> shift;
726 val &= div_mask(width);
728 return divider_recalc_rate(hw, parent_rate, val, NULL,
729 postdiv->flags, width);
732 static long dsi_pll_14nm_postdiv_round_rate(struct clk_hw *hw,
734 unsigned long *prate)
736 struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw);
737 struct dsi_pll_14nm *pll_14nm = postdiv->pll;
739 DBG("DSI%d PLL parent rate=%lu", pll_14nm->id, rate);
741 return divider_round_rate(hw, rate, prate, NULL,
746 static int dsi_pll_14nm_postdiv_set_rate(struct clk_hw *hw, unsigned long rate,
747 unsigned long parent_rate)
749 struct dsi_pll_14nm_postdiv *postdiv = to_pll_14nm_postdiv(hw);
750 struct dsi_pll_14nm *pll_14nm = postdiv->pll;
751 void __iomem *base = pll_14nm->phy_cmn_mmio;
752 spinlock_t *lock = &pll_14nm->postdiv_lock;
753 u8 shift = postdiv->shift;
754 u8 width = postdiv->width;
756 unsigned long flags = 0;
759 DBG("DSI%d PLL parent rate=%lu parent rate %lu", pll_14nm->id, rate,
762 value = divider_get_val(rate, parent_rate, NULL, postdiv->width,
765 spin_lock_irqsave(lock, flags);
767 val = pll_read(base + REG_DSI_14nm_PHY_CMN_CLK_CFG0);
768 val &= ~(div_mask(width) << shift);
770 val |= value << shift;
771 pll_write(base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, val);
773 /* If we're master in dual DSI mode, then the slave PLL's post-dividers
774 * follow the master's post dividers
776 if (pll_14nm->uc == MSM_DSI_PHY_MASTER) {
777 struct dsi_pll_14nm *pll_14nm_slave = pll_14nm->slave;
778 void __iomem *slave_base = pll_14nm_slave->phy_cmn_mmio;
780 pll_write(slave_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, val);
783 spin_unlock_irqrestore(lock, flags);
788 static const struct clk_ops clk_ops_dsi_pll_14nm_postdiv = {
789 .recalc_rate = dsi_pll_14nm_postdiv_recalc_rate,
790 .round_rate = dsi_pll_14nm_postdiv_round_rate,
791 .set_rate = dsi_pll_14nm_postdiv_set_rate,
798 static void dsi_pll_14nm_save_state(struct msm_dsi_pll *pll)
800 struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
801 struct pll_14nm_cached_state *cached_state = &pll_14nm->cached_state;
802 void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
805 data = pll_read(cmn_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0);
807 cached_state->n1postdiv = data & 0xf;
808 cached_state->n2postdiv = (data >> 4) & 0xf;
810 DBG("DSI%d PLL save state %x %x", pll_14nm->id,
811 cached_state->n1postdiv, cached_state->n2postdiv);
813 cached_state->vco_rate = clk_hw_get_rate(&pll->clk_hw);
816 static int dsi_pll_14nm_restore_state(struct msm_dsi_pll *pll)
818 struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
819 struct pll_14nm_cached_state *cached_state = &pll_14nm->cached_state;
820 void __iomem *cmn_base = pll_14nm->phy_cmn_mmio;
824 ret = dsi_pll_14nm_vco_set_rate(&pll->clk_hw,
825 cached_state->vco_rate, 0);
827 DRM_DEV_ERROR(&pll_14nm->pdev->dev,
828 "restore vco rate failed. ret=%d\n", ret);
832 data = cached_state->n1postdiv | (cached_state->n2postdiv << 4);
834 DBG("DSI%d PLL restore state %x %x", pll_14nm->id,
835 cached_state->n1postdiv, cached_state->n2postdiv);
837 pll_write(cmn_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, data);
839 /* also restore post-dividers for slave DSI PLL */
840 if (pll_14nm->uc == MSM_DSI_PHY_MASTER) {
841 struct dsi_pll_14nm *pll_14nm_slave = pll_14nm->slave;
842 void __iomem *slave_base = pll_14nm_slave->phy_cmn_mmio;
844 pll_write(slave_base + REG_DSI_14nm_PHY_CMN_CLK_CFG0, data);
850 static int dsi_pll_14nm_set_usecase(struct msm_dsi_pll *pll,
851 enum msm_dsi_phy_usecase uc)
853 struct dsi_pll_14nm *pll_14nm = to_pll_14nm(pll);
854 void __iomem *base = pll_14nm->mmio;
855 u32 clkbuflr_en, bandgap = 0;
858 case MSM_DSI_PHY_STANDALONE:
861 case MSM_DSI_PHY_MASTER:
863 pll_14nm->slave = pll_14nm_list[(pll_14nm->id + 1) % DSI_MAX];
865 case MSM_DSI_PHY_SLAVE:
873 pll_write(base + REG_DSI_14nm_PHY_PLL_CLKBUFLR_EN, clkbuflr_en);
875 pll_write(base + REG_DSI_14nm_PHY_PLL_PLL_BANDGAP, bandgap);
882 static struct clk_hw *pll_14nm_postdiv_register(struct dsi_pll_14nm *pll_14nm,
884 const char *parent_name,
888 struct dsi_pll_14nm_postdiv *pll_postdiv;
889 struct device *dev = &pll_14nm->pdev->dev;
890 struct clk_init_data postdiv_init = {
891 .parent_names = (const char *[]) { parent_name },
895 .ops = &clk_ops_dsi_pll_14nm_postdiv,
899 pll_postdiv = devm_kzalloc(dev, sizeof(*pll_postdiv), GFP_KERNEL);
901 return ERR_PTR(-ENOMEM);
903 pll_postdiv->pll = pll_14nm;
904 pll_postdiv->shift = shift;
905 /* both N1 and N2 postdividers are 4 bits wide */
906 pll_postdiv->width = 4;
907 /* range of each divider is from 1 to 15 */
908 pll_postdiv->flags = CLK_DIVIDER_ONE_BASED;
909 pll_postdiv->hw.init = &postdiv_init;
911 ret = devm_clk_hw_register(dev, &pll_postdiv->hw);
915 return &pll_postdiv->hw;
918 static int pll_14nm_register(struct dsi_pll_14nm *pll_14nm, struct clk_hw **provided_clocks)
920 char clk_name[32], parent[32], vco_name[32];
921 struct clk_init_data vco_init = {
922 .parent_names = (const char *[]){ "xo" },
925 .flags = CLK_IGNORE_UNUSED,
926 .ops = &clk_ops_dsi_pll_14nm_vco,
928 struct device *dev = &pll_14nm->pdev->dev;
932 DBG("DSI%d", pll_14nm->id);
934 snprintf(vco_name, 32, "dsi%dvco_clk", pll_14nm->id);
935 pll_14nm->base.clk_hw.init = &vco_init;
937 ret = devm_clk_hw_register(dev, &pll_14nm->base.clk_hw);
941 snprintf(clk_name, 32, "dsi%dn1_postdiv_clk", pll_14nm->id);
942 snprintf(parent, 32, "dsi%dvco_clk", pll_14nm->id);
944 /* N1 postdiv, bits 0-3 in REG_DSI_14nm_PHY_CMN_CLK_CFG0 */
945 hw = pll_14nm_postdiv_register(pll_14nm, clk_name, parent,
946 CLK_SET_RATE_PARENT, 0);
950 snprintf(clk_name, 32, "dsi%dpllbyte", pll_14nm->id);
951 snprintf(parent, 32, "dsi%dn1_postdiv_clk", pll_14nm->id);
953 /* DSI Byte clock = VCO_CLK / N1 / 8 */
954 hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent,
955 CLK_SET_RATE_PARENT, 1, 8);
959 provided_clocks[DSI_BYTE_PLL_CLK] = hw;
961 snprintf(clk_name, 32, "dsi%dn1_postdivby2_clk", pll_14nm->id);
962 snprintf(parent, 32, "dsi%dn1_postdiv_clk", pll_14nm->id);
965 * Skip the mux for now, force DSICLK_SEL to 1, Add a /2 divider
966 * on the way. Don't let it set parent.
968 hw = devm_clk_hw_register_fixed_factor(dev, clk_name, parent, 0, 1, 2);
972 snprintf(clk_name, 32, "dsi%dpll", pll_14nm->id);
973 snprintf(parent, 32, "dsi%dn1_postdivby2_clk", pll_14nm->id);
975 /* DSI pixel clock = VCO_CLK / N1 / 2 / N2
976 * This is the output of N2 post-divider, bits 4-7 in
977 * REG_DSI_14nm_PHY_CMN_CLK_CFG0. Don't let it set parent.
979 hw = pll_14nm_postdiv_register(pll_14nm, clk_name, parent, 0, 4);
983 provided_clocks[DSI_PIXEL_PLL_CLK] = hw;
988 static int dsi_pll_14nm_init(struct msm_dsi_phy *phy)
990 struct platform_device *pdev = phy->pdev;
992 struct dsi_pll_14nm *pll_14nm;
993 struct msm_dsi_pll *pll;
999 pll_14nm = devm_kzalloc(&pdev->dev, sizeof(*pll_14nm), GFP_KERNEL);
1005 pll_14nm->pdev = pdev;
1007 pll_14nm_list[id] = pll_14nm;
1009 pll_14nm->phy_cmn_mmio = msm_ioremap(pdev, "dsi_phy", "DSI_PHY");
1010 if (IS_ERR_OR_NULL(pll_14nm->phy_cmn_mmio)) {
1011 DRM_DEV_ERROR(&pdev->dev, "failed to map CMN PHY base\n");
1015 pll_14nm->mmio = msm_ioremap(pdev, "dsi_pll", "DSI_PLL");
1016 if (IS_ERR_OR_NULL(pll_14nm->mmio)) {
1017 DRM_DEV_ERROR(&pdev->dev, "failed to map PLL base\n");
1021 spin_lock_init(&pll_14nm->postdiv_lock);
1023 pll = &pll_14nm->base;
1024 pll->cfg = phy->cfg;
1026 ret = pll_14nm_register(pll_14nm, phy->provided_clocks->hws);
1028 DRM_DEV_ERROR(&pdev->dev, "failed to register PLL: %d\n", ret);
1037 static void dsi_14nm_dphy_set_timing(struct msm_dsi_phy *phy,
1038 struct msm_dsi_dphy_timing *timing,
1041 void __iomem *base = phy->lane_base;
1042 bool clk_ln = (lane_idx == PHY_14NM_CKLN_IDX);
1043 u32 zero = clk_ln ? timing->clk_zero : timing->hs_zero;
1044 u32 prepare = clk_ln ? timing->clk_prepare : timing->hs_prepare;
1045 u32 trail = clk_ln ? timing->clk_trail : timing->hs_trail;
1046 u32 rqst = clk_ln ? timing->hs_rqst_ckln : timing->hs_rqst;
1047 u32 prep_dly = clk_ln ? timing->hs_prep_dly_ckln : timing->hs_prep_dly;
1048 u32 halfbyte_en = clk_ln ? timing->hs_halfbyte_en_ckln :
1049 timing->hs_halfbyte_en;
1051 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_TIMING_CTRL_4(lane_idx),
1052 DSI_14nm_PHY_LN_TIMING_CTRL_4_HS_EXIT(timing->hs_exit));
1053 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_TIMING_CTRL_5(lane_idx),
1054 DSI_14nm_PHY_LN_TIMING_CTRL_5_HS_ZERO(zero));
1055 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_TIMING_CTRL_6(lane_idx),
1056 DSI_14nm_PHY_LN_TIMING_CTRL_6_HS_PREPARE(prepare));
1057 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_TIMING_CTRL_7(lane_idx),
1058 DSI_14nm_PHY_LN_TIMING_CTRL_7_HS_TRAIL(trail));
1059 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_TIMING_CTRL_8(lane_idx),
1060 DSI_14nm_PHY_LN_TIMING_CTRL_8_HS_RQST(rqst));
1061 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_CFG0(lane_idx),
1062 DSI_14nm_PHY_LN_CFG0_PREPARE_DLY(prep_dly));
1063 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_CFG1(lane_idx),
1064 halfbyte_en ? DSI_14nm_PHY_LN_CFG1_HALFBYTECLK_EN : 0);
1065 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_TIMING_CTRL_9(lane_idx),
1066 DSI_14nm_PHY_LN_TIMING_CTRL_9_TA_GO(timing->ta_go) |
1067 DSI_14nm_PHY_LN_TIMING_CTRL_9_TA_SURE(timing->ta_sure));
1068 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_TIMING_CTRL_10(lane_idx),
1069 DSI_14nm_PHY_LN_TIMING_CTRL_10_TA_GET(timing->ta_get));
1070 dsi_phy_write(base + REG_DSI_14nm_PHY_LN_TIMING_CTRL_11(lane_idx),
1071 DSI_14nm_PHY_LN_TIMING_CTRL_11_TRIG3_CMD(0xa0));
1074 static int dsi_14nm_phy_enable(struct msm_dsi_phy *phy, int src_pll_id,
1075 struct msm_dsi_phy_clk_request *clk_req)
1077 struct msm_dsi_dphy_timing *timing = &phy->timing;
1081 void __iomem *base = phy->base;
1082 void __iomem *lane_base = phy->lane_base;
1084 if (msm_dsi_dphy_timing_calc_v2(timing, clk_req)) {
1085 DRM_DEV_ERROR(&phy->pdev->dev,
1086 "%s: D-PHY timing calculation failed\n", __func__);
1091 if (phy->usecase != MSM_DSI_PHY_STANDALONE)
1092 data |= DSI_14nm_PHY_CMN_LDO_CNTRL_VREG_CTRL(32);
1093 dsi_phy_write(base + REG_DSI_14nm_PHY_CMN_LDO_CNTRL, data);
1095 dsi_phy_write(base + REG_DSI_14nm_PHY_CMN_GLBL_TEST_CTRL, 0x1);
1097 /* 4 data lanes + 1 clk lane configuration */
1098 for (i = 0; i < 5; i++) {
1099 dsi_phy_write(lane_base + REG_DSI_14nm_PHY_LN_VREG_CNTRL(i),
1102 dsi_phy_write(lane_base +
1103 REG_DSI_14nm_PHY_LN_STRENGTH_CTRL_0(i), 0xff);
1104 dsi_phy_write(lane_base +
1105 REG_DSI_14nm_PHY_LN_STRENGTH_CTRL_1(i),
1106 (i == PHY_14NM_CKLN_IDX) ? 0x00 : 0x06);
1108 dsi_phy_write(lane_base + REG_DSI_14nm_PHY_LN_CFG3(i),
1109 (i == PHY_14NM_CKLN_IDX) ? 0x8f : 0x0f);
1110 dsi_phy_write(lane_base + REG_DSI_14nm_PHY_LN_CFG2(i), 0x10);
1111 dsi_phy_write(lane_base + REG_DSI_14nm_PHY_LN_TEST_DATAPATH(i),
1113 dsi_phy_write(lane_base + REG_DSI_14nm_PHY_LN_TEST_STR(i),
1116 dsi_14nm_dphy_set_timing(phy, timing, i);
1119 /* Make sure PLL is not start */
1120 dsi_phy_write(base + REG_DSI_14nm_PHY_CMN_PLL_CNTRL, 0x00);
1122 wmb(); /* make sure everything is written before reset and enable */
1124 /* reset digital block */
1125 dsi_phy_write(base + REG_DSI_14nm_PHY_CMN_CTRL_1, 0x80);
1126 wmb(); /* ensure reset is asserted */
1128 dsi_phy_write(base + REG_DSI_14nm_PHY_CMN_CTRL_1, 0x00);
1130 msm_dsi_phy_set_src_pll(phy, src_pll_id,
1131 REG_DSI_14nm_PHY_CMN_GLBL_TEST_CTRL,
1132 DSI_14nm_PHY_CMN_GLBL_TEST_CTRL_BITCLK_HS_SEL);
1134 ret = dsi_pll_14nm_set_usecase(phy->pll, phy->usecase);
1136 DRM_DEV_ERROR(&phy->pdev->dev, "%s: set pll usecase failed, %d\n",
1141 /* Remove power down from PLL and all lanes */
1142 dsi_phy_write(base + REG_DSI_14nm_PHY_CMN_CTRL_0, 0xff);
1147 static void dsi_14nm_phy_disable(struct msm_dsi_phy *phy)
1149 dsi_phy_write(phy->base + REG_DSI_14nm_PHY_CMN_GLBL_TEST_CTRL, 0);
1150 dsi_phy_write(phy->base + REG_DSI_14nm_PHY_CMN_CTRL_0, 0);
1152 /* ensure that the phy is completely disabled */
1156 const struct msm_dsi_phy_cfg dsi_phy_14nm_cfgs = {
1157 .src_pll_truthtable = { {false, false}, {true, false} },
1158 .has_phy_lane = true,
1162 {"vcca", 17000, 32},
1166 .enable = dsi_14nm_phy_enable,
1167 .disable = dsi_14nm_phy_disable,
1168 .pll_init = dsi_pll_14nm_init,
1171 .save_state = dsi_pll_14nm_save_state,
1172 .restore_state = dsi_pll_14nm_restore_state,
1174 .min_pll_rate = VCO_MIN_RATE,
1175 .max_pll_rate = VCO_MAX_RATE,
1176 .io_start = { 0x994400, 0x996400 },
1180 const struct msm_dsi_phy_cfg dsi_phy_14nm_660_cfgs = {
1181 .src_pll_truthtable = { {false, false}, {true, false} },
1182 .has_phy_lane = true,
1186 {"vcca", 17000, 32},
1190 .enable = dsi_14nm_phy_enable,
1191 .disable = dsi_14nm_phy_disable,
1192 .pll_init = dsi_pll_14nm_init,
1195 .save_state = dsi_pll_14nm_save_state,
1196 .restore_state = dsi_pll_14nm_restore_state,
1198 .min_pll_rate = VCO_MIN_RATE,
1199 .max_pll_rate = VCO_MAX_RATE,
1200 .io_start = { 0xc994400, 0xc996000 },