1 /*
2  * Copyright 2018 Advanced Micro Devices, Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: AMD
23  *
24  */
25 
26 #include "dccg.h"
27 #include "clk_mgr_internal.h"
28 
29 #include "dce100/dce_clk_mgr.h"
30 #include "dcn20_clk_mgr.h"
31 #include "reg_helper.h"
32 #include "core_types.h"
33 #include "dm_helpers.h"
34 
35 #include "navi10_ip_offset.h"
36 #include "dcn/dcn_2_0_0_offset.h"
37 #include "dcn/dcn_2_0_0_sh_mask.h"
38 #include "clk/clk_11_0_0_offset.h"
39 #include "clk/clk_11_0_0_sh_mask.h"
40 
41 
42 #undef FN
43 #define FN(reg_name, field_name) \
44 	clk_mgr->clk_mgr_shift->field_name, clk_mgr->clk_mgr_mask->field_name
45 
46 #define REG(reg) \
47 	(clk_mgr->regs->reg)
48 
49 #define BASE_INNER(seg) DCN_BASE__INST0_SEG ## seg
50 
51 #define BASE(seg) BASE_INNER(seg)
52 
53 #define SR(reg_name)\
54 		.reg_name = BASE(mm ## reg_name ## _BASE_IDX) +  \
55 					mm ## reg_name
56 
57 #define CLK_BASE_INNER(seg) \
58 	CLK_BASE__INST0_SEG ## seg
59 
60 
61 static const struct clk_mgr_registers clk_mgr_regs = {
62 	CLK_REG_LIST_NV10()
63 };
64 
65 static const struct clk_mgr_shift clk_mgr_shift = {
66 	CLK_MASK_SH_LIST_NV10(__SHIFT)
67 };
68 
69 static const struct clk_mgr_mask clk_mgr_mask = {
70 	CLK_MASK_SH_LIST_NV10(_MASK)
71 };
72 
dentist_get_did_from_divider(int divider)73 uint32_t dentist_get_did_from_divider(int divider)
74 {
75 	uint32_t divider_id;
76 
77 	/* we want to floor here to get higher clock than required rather than lower */
78 	if (divider < DENTIST_DIVIDER_RANGE_2_START) {
79 		if (divider < DENTIST_DIVIDER_RANGE_1_START)
80 			divider_id = DENTIST_BASE_DID_1;
81 		else
82 			divider_id = DENTIST_BASE_DID_1
83 				+ (divider - DENTIST_DIVIDER_RANGE_1_START)
84 					/ DENTIST_DIVIDER_RANGE_1_STEP;
85 	} else if (divider < DENTIST_DIVIDER_RANGE_3_START) {
86 		divider_id = DENTIST_BASE_DID_2
87 				+ (divider - DENTIST_DIVIDER_RANGE_2_START)
88 					/ DENTIST_DIVIDER_RANGE_2_STEP;
89 	} else if (divider < DENTIST_DIVIDER_RANGE_4_START) {
90 		divider_id = DENTIST_BASE_DID_3
91 				+ (divider - DENTIST_DIVIDER_RANGE_3_START)
92 					/ DENTIST_DIVIDER_RANGE_3_STEP;
93 	} else {
94 		divider_id = DENTIST_BASE_DID_4
95 				+ (divider - DENTIST_DIVIDER_RANGE_4_START)
96 					/ DENTIST_DIVIDER_RANGE_4_STEP;
97 		if (divider_id > DENTIST_MAX_DID)
98 			divider_id = DENTIST_MAX_DID;
99 	}
100 
101 	return divider_id;
102 }
103 
dcn20_update_clocks_update_dpp_dto(struct clk_mgr_internal * clk_mgr,struct dc_state * context,bool safe_to_lower)104 void dcn20_update_clocks_update_dpp_dto(struct clk_mgr_internal *clk_mgr,
105 		struct dc_state *context, bool safe_to_lower)
106 {
107 	int i;
108 
109 	clk_mgr->dccg->ref_dppclk = clk_mgr->base.clks.dppclk_khz;
110 	for (i = 0; i < clk_mgr->base.ctx->dc->res_pool->pipe_count; i++) {
111 		int dpp_inst, dppclk_khz, prev_dppclk_khz;
112 
113 		/* Loop index will match dpp->inst if resource exists,
114 		 * and we want to avoid dependency on dpp object
115 		 */
116 		dpp_inst = i;
117 		dppclk_khz = context->res_ctx.pipe_ctx[i].plane_res.bw.dppclk_khz;
118 
119 		prev_dppclk_khz = clk_mgr->dccg->pipe_dppclk_khz[i];
120 
121 		if (safe_to_lower || prev_dppclk_khz < dppclk_khz)
122 			clk_mgr->dccg->funcs->update_dpp_dto(
123 							clk_mgr->dccg, dpp_inst, dppclk_khz);
124 	}
125 }
126 
dcn20_update_clocks_update_dentist(struct clk_mgr_internal * clk_mgr,struct dc_state * context)127 void dcn20_update_clocks_update_dentist(struct clk_mgr_internal *clk_mgr, struct dc_state *context)
128 {
129 	int dpp_divider = 0;
130 	int disp_divider = 0;
131 	uint32_t dppclk_wdivider = 0;
132 	uint32_t dispclk_wdivider = 0;
133 	uint32_t current_dispclk_wdivider;
134 	uint32_t i;
135 
136 	if (clk_mgr->base.clks.dppclk_khz == 0 || clk_mgr->base.clks.dispclk_khz == 0)
137 		return;
138 
139 	dpp_divider = DENTIST_DIVIDER_RANGE_SCALE_FACTOR
140 		* clk_mgr->base.dentist_vco_freq_khz / clk_mgr->base.clks.dppclk_khz;
141 	disp_divider = DENTIST_DIVIDER_RANGE_SCALE_FACTOR
142 		* clk_mgr->base.dentist_vco_freq_khz / clk_mgr->base.clks.dispclk_khz;
143 
144 	dppclk_wdivider = dentist_get_did_from_divider(dpp_divider);
145 	dispclk_wdivider = dentist_get_did_from_divider(disp_divider);
146 
147 	REG_GET(DENTIST_DISPCLK_CNTL,
148 			DENTIST_DISPCLK_WDIVIDER, &current_dispclk_wdivider);
149 
150 	/* When changing divider to or from 127, some extra programming is required to prevent corruption */
151 	if (current_dispclk_wdivider == 127 && dispclk_wdivider != 127) {
152 		for (i = 0; i < clk_mgr->base.ctx->dc->res_pool->pipe_count; i++) {
153 			struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
154 			uint32_t fifo_level;
155 			struct dccg *dccg = clk_mgr->base.ctx->dc->res_pool->dccg;
156 			struct stream_encoder *stream_enc = pipe_ctx->stream_res.stream_enc;
157 			int32_t N;
158 			int32_t j;
159 
160 			if (!resource_is_pipe_type(pipe_ctx, OTG_MASTER))
161 				continue;
162 			/* Virtual encoders don't have this function */
163 			if (!stream_enc->funcs->get_fifo_cal_average_level)
164 				continue;
165 			fifo_level = stream_enc->funcs->get_fifo_cal_average_level(
166 					stream_enc);
167 			N = fifo_level / 4;
168 			dccg->funcs->set_fifo_errdet_ovr_en(
169 					dccg,
170 					true);
171 			for (j = 0; j < N - 4; j++)
172 				dccg->funcs->otg_drop_pixel(
173 						dccg,
174 						pipe_ctx->stream_res.tg->inst);
175 			dccg->funcs->set_fifo_errdet_ovr_en(
176 					dccg,
177 					false);
178 		}
179 	} else if (dispclk_wdivider == 127 && current_dispclk_wdivider != 127) {
180 		REG_UPDATE(DENTIST_DISPCLK_CNTL,
181 				DENTIST_DISPCLK_WDIVIDER, 126);
182 		REG_WAIT(DENTIST_DISPCLK_CNTL, DENTIST_DISPCLK_CHG_DONE, 1, 50, 2000);
183 		for (i = 0; i < clk_mgr->base.ctx->dc->res_pool->pipe_count; i++) {
184 			struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
185 			struct dccg *dccg = clk_mgr->base.ctx->dc->res_pool->dccg;
186 			struct stream_encoder *stream_enc = pipe_ctx->stream_res.stream_enc;
187 			uint32_t fifo_level;
188 			int32_t N;
189 			int32_t j;
190 
191 			if (!resource_is_pipe_type(pipe_ctx, OTG_MASTER))
192 				continue;
193 			/* Virtual encoders don't have this function */
194 			if (!stream_enc->funcs->get_fifo_cal_average_level)
195 				continue;
196 			fifo_level = stream_enc->funcs->get_fifo_cal_average_level(
197 					stream_enc);
198 			N = fifo_level / 4;
199 			dccg->funcs->set_fifo_errdet_ovr_en(dccg, true);
200 			for (j = 0; j < 12 - N; j++)
201 				dccg->funcs->otg_add_pixel(dccg,
202 						pipe_ctx->stream_res.tg->inst);
203 			dccg->funcs->set_fifo_errdet_ovr_en(dccg, false);
204 		}
205 	}
206 
207 	REG_UPDATE(DENTIST_DISPCLK_CNTL,
208 			DENTIST_DISPCLK_WDIVIDER, dispclk_wdivider);
209 	REG_WAIT(DENTIST_DISPCLK_CNTL, DENTIST_DISPCLK_CHG_DONE, 1, 50, 2000);
210 	REG_UPDATE(DENTIST_DISPCLK_CNTL,
211 			DENTIST_DPPCLK_WDIVIDER, dppclk_wdivider);
212 	REG_WAIT(DENTIST_DISPCLK_CNTL, DENTIST_DPPCLK_CHG_DONE, 1, 5, 100);
213 }
214 
215 
dcn2_update_clocks(struct clk_mgr * clk_mgr_base,struct dc_state * context,bool safe_to_lower)216 void dcn2_update_clocks(struct clk_mgr *clk_mgr_base,
217 			struct dc_state *context,
218 			bool safe_to_lower)
219 {
220 	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
221 	struct dc_clocks *new_clocks = &context->bw_ctx.bw.dcn.clk;
222 	struct dc *dc = clk_mgr_base->ctx->dc;
223 	struct pp_smu_funcs_nv *pp_smu = NULL;
224 	int display_count;
225 	bool update_dppclk = false;
226 	bool update_dispclk = false;
227 	bool enter_display_off = false;
228 	bool dpp_clock_lowered = false;
229 	struct dmcu *dmcu = clk_mgr_base->ctx->dc->res_pool->dmcu;
230 	bool force_reset = false;
231 	bool p_state_change_support;
232 	int total_plane_count;
233 
234 	if (dc->work_arounds.skip_clock_update)
235 		return;
236 
237 	if (clk_mgr_base->clks.dispclk_khz == 0 ||
238 		dc->debug.force_clock_mode & 0x1) {
239 		//this is from resume or boot up, if forced_clock cfg option used, we bypass program dispclk and DPPCLK, but need set them for S3.
240 		force_reset = true;
241 
242 		dcn2_read_clocks_from_hw_dentist(clk_mgr_base);
243 
244 		//force_clock_mode 0x1:  force reset the clock even it is the same clock as long as it is in Passive level.
245 	}
246 	display_count = clk_mgr_helper_get_active_display_cnt(dc, context);
247 	if (dc->res_pool->pp_smu)
248 		pp_smu = &dc->res_pool->pp_smu->nv_funcs;
249 
250 	if (display_count == 0)
251 		enter_display_off = true;
252 
253 	if (enter_display_off == safe_to_lower) {
254 		if (pp_smu && pp_smu->set_display_count)
255 			pp_smu->set_display_count(&pp_smu->pp_smu, display_count);
256 	}
257 
258 	if (dc->debug.force_min_dcfclk_mhz > 0)
259 		new_clocks->dcfclk_khz = (new_clocks->dcfclk_khz > (dc->debug.force_min_dcfclk_mhz * 1000)) ?
260 				new_clocks->dcfclk_khz : (dc->debug.force_min_dcfclk_mhz * 1000);
261 
262 	if (should_set_clock(safe_to_lower, new_clocks->dcfclk_khz, clk_mgr_base->clks.dcfclk_khz)) {
263 		clk_mgr_base->clks.dcfclk_khz = new_clocks->dcfclk_khz;
264 		if (pp_smu && pp_smu->set_hard_min_dcfclk_by_freq)
265 			pp_smu->set_hard_min_dcfclk_by_freq(&pp_smu->pp_smu, khz_to_mhz_ceil(clk_mgr_base->clks.dcfclk_khz));
266 	}
267 
268 	if (should_set_clock(safe_to_lower,
269 			new_clocks->dcfclk_deep_sleep_khz, clk_mgr_base->clks.dcfclk_deep_sleep_khz)) {
270 		clk_mgr_base->clks.dcfclk_deep_sleep_khz = new_clocks->dcfclk_deep_sleep_khz;
271 		if (pp_smu && pp_smu->set_min_deep_sleep_dcfclk)
272 			pp_smu->set_min_deep_sleep_dcfclk(&pp_smu->pp_smu, khz_to_mhz_ceil(clk_mgr_base->clks.dcfclk_deep_sleep_khz));
273 	}
274 
275 	if (should_set_clock(safe_to_lower, new_clocks->socclk_khz, clk_mgr_base->clks.socclk_khz)) {
276 		clk_mgr_base->clks.socclk_khz = new_clocks->socclk_khz;
277 		if (pp_smu && pp_smu->set_hard_min_socclk_by_freq)
278 			pp_smu->set_hard_min_socclk_by_freq(&pp_smu->pp_smu, khz_to_mhz_ceil(clk_mgr_base->clks.socclk_khz));
279 	}
280 
281 	total_plane_count = clk_mgr_helper_get_active_plane_cnt(dc, context);
282 	p_state_change_support = new_clocks->p_state_change_support || (total_plane_count == 0);
283 	if (should_update_pstate_support(safe_to_lower, p_state_change_support, clk_mgr_base->clks.p_state_change_support)) {
284 		clk_mgr_base->clks.prev_p_state_change_support = clk_mgr_base->clks.p_state_change_support;
285 		clk_mgr_base->clks.p_state_change_support = p_state_change_support;
286 		if (pp_smu && pp_smu->set_pstate_handshake_support)
287 			pp_smu->set_pstate_handshake_support(&pp_smu->pp_smu, clk_mgr_base->clks.p_state_change_support);
288 	}
289 
290 	if (should_set_clock(safe_to_lower, new_clocks->dramclk_khz, clk_mgr_base->clks.dramclk_khz)) {
291 		clk_mgr_base->clks.dramclk_khz = new_clocks->dramclk_khz;
292 		if (pp_smu && pp_smu->set_hard_min_uclk_by_freq)
293 			pp_smu->set_hard_min_uclk_by_freq(&pp_smu->pp_smu, khz_to_mhz_ceil(clk_mgr_base->clks.dramclk_khz));
294 	}
295 
296 	if (should_set_clock(safe_to_lower, new_clocks->dppclk_khz, clk_mgr->base.clks.dppclk_khz)) {
297 		if (clk_mgr->base.clks.dppclk_khz > new_clocks->dppclk_khz)
298 			dpp_clock_lowered = true;
299 		clk_mgr->base.clks.dppclk_khz = new_clocks->dppclk_khz;
300 
301 		update_dppclk = true;
302 	}
303 
304 	if (should_set_clock(safe_to_lower, new_clocks->dispclk_khz, clk_mgr_base->clks.dispclk_khz)) {
305 		clk_mgr_base->clks.dispclk_khz = new_clocks->dispclk_khz;
306 
307 		update_dispclk = true;
308 	}
309 
310 	if (update_dppclk || update_dispclk) {
311 		new_clocks->disp_dpp_voltage_level_khz = new_clocks->dppclk_khz;
312 
313 		if (update_dispclk)
314 			new_clocks->disp_dpp_voltage_level_khz = new_clocks->dispclk_khz > new_clocks->dppclk_khz ? new_clocks->dispclk_khz : new_clocks->dppclk_khz;
315 
316 		clk_mgr_base->clks.disp_dpp_voltage_level_khz = new_clocks->disp_dpp_voltage_level_khz;
317 		if (pp_smu && pp_smu->set_voltage_by_freq)
318 			pp_smu->set_voltage_by_freq(&pp_smu->pp_smu, PP_SMU_NV_DISPCLK, khz_to_mhz_ceil(clk_mgr_base->clks.disp_dpp_voltage_level_khz));
319 	}
320 
321 	if (dc->config.forced_clocks == false || (force_reset && safe_to_lower)) {
322 		if (dpp_clock_lowered) {
323 			// if clock is being lowered, increase DTO before lowering refclk
324 			dcn20_update_clocks_update_dpp_dto(clk_mgr, context, safe_to_lower);
325 			dcn20_update_clocks_update_dentist(clk_mgr, context);
326 		} else {
327 			// if clock is being raised, increase refclk before lowering DTO
328 			if (update_dppclk || update_dispclk)
329 				dcn20_update_clocks_update_dentist(clk_mgr, context);
330 			// always update dtos unless clock is lowered and not safe to lower
331 			dcn20_update_clocks_update_dpp_dto(clk_mgr, context, safe_to_lower);
332 		}
333 	}
334 
335 	if (update_dispclk &&
336 			dmcu && dmcu->funcs->is_dmcu_initialized(dmcu)) {
337 		/*update dmcu for wait_loop count*/
338 		dmcu->funcs->set_psr_wait_loop(dmcu,
339 			clk_mgr_base->clks.dispclk_khz / 1000 / 7);
340 	}
341 }
342 
dcn2_update_clocks_fpga(struct clk_mgr * clk_mgr,struct dc_state * context,bool safe_to_lower)343 void dcn2_update_clocks_fpga(struct clk_mgr *clk_mgr,
344 		struct dc_state *context,
345 		bool safe_to_lower)
346 {
347 	struct clk_mgr_internal *clk_mgr_int = TO_CLK_MGR_INTERNAL(clk_mgr);
348 
349 	struct dc_clocks *new_clocks = &context->bw_ctx.bw.dcn.clk;
350 	/* Min fclk = 1.2GHz since all the extra scemi logic seems to run off of it */
351 	int fclk_adj = new_clocks->fclk_khz > 1200000 ? new_clocks->fclk_khz : 1200000;
352 
353 	if (should_set_clock(safe_to_lower, new_clocks->phyclk_khz, clk_mgr->clks.phyclk_khz)) {
354 		clk_mgr->clks.phyclk_khz = new_clocks->phyclk_khz;
355 	}
356 
357 	if (should_set_clock(safe_to_lower, new_clocks->dcfclk_khz, clk_mgr->clks.dcfclk_khz)) {
358 		clk_mgr->clks.dcfclk_khz = new_clocks->dcfclk_khz;
359 	}
360 
361 	if (should_set_clock(safe_to_lower,
362 			new_clocks->dcfclk_deep_sleep_khz, clk_mgr->clks.dcfclk_deep_sleep_khz)) {
363 		clk_mgr->clks.dcfclk_deep_sleep_khz = new_clocks->dcfclk_deep_sleep_khz;
364 	}
365 
366 	if (should_set_clock(safe_to_lower, new_clocks->socclk_khz, clk_mgr->clks.socclk_khz)) {
367 		clk_mgr->clks.socclk_khz = new_clocks->socclk_khz;
368 	}
369 
370 	if (should_set_clock(safe_to_lower, new_clocks->dramclk_khz, clk_mgr->clks.dramclk_khz)) {
371 		clk_mgr->clks.dramclk_khz = new_clocks->dramclk_khz;
372 	}
373 
374 	if (should_set_clock(safe_to_lower, new_clocks->dppclk_khz, clk_mgr->clks.dppclk_khz)) {
375 		clk_mgr->clks.dppclk_khz = new_clocks->dppclk_khz;
376 	}
377 
378 	if (should_set_clock(safe_to_lower, fclk_adj, clk_mgr->clks.fclk_khz)) {
379 		clk_mgr->clks.fclk_khz = fclk_adj;
380 	}
381 
382 	if (should_set_clock(safe_to_lower, new_clocks->dispclk_khz, clk_mgr->clks.dispclk_khz)) {
383 		clk_mgr->clks.dispclk_khz = new_clocks->dispclk_khz;
384 	}
385 
386 	/* Both fclk and ref_dppclk run on the same scemi clock.
387 	 * So take the higher value since the DPP DTO is typically programmed
388 	 * such that max dppclk is 1:1 with ref_dppclk.
389 	 */
390 	if (clk_mgr->clks.fclk_khz > clk_mgr->clks.dppclk_khz)
391 		clk_mgr->clks.dppclk_khz = clk_mgr->clks.fclk_khz;
392 	if (clk_mgr->clks.dppclk_khz > clk_mgr->clks.fclk_khz)
393 		clk_mgr->clks.fclk_khz = clk_mgr->clks.dppclk_khz;
394 
395 	// Both fclk and ref_dppclk run on the same scemi clock.
396 	clk_mgr_int->dccg->ref_dppclk = clk_mgr->clks.fclk_khz;
397 
398 	/* TODO: set dtbclk in correct place */
399 	clk_mgr->clks.dtbclk_en = false;
400 	dm_set_dcn_clocks(clk_mgr->ctx, &clk_mgr->clks);
401 }
402 
dcn2_init_clocks(struct clk_mgr * clk_mgr)403 void dcn2_init_clocks(struct clk_mgr *clk_mgr)
404 {
405 	memset(&(clk_mgr->clks), 0, sizeof(struct dc_clocks));
406 	// Assumption is that boot state always supports pstate
407 	clk_mgr->clks.p_state_change_support = true;
408 	clk_mgr->clks.prev_p_state_change_support = true;
409 }
410 
dcn2_enable_pme_wa(struct clk_mgr * clk_mgr_base)411 static void dcn2_enable_pme_wa(struct clk_mgr *clk_mgr_base)
412 {
413 	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
414 	struct pp_smu_funcs_nv *pp_smu = NULL;
415 
416 	if (clk_mgr->pp_smu) {
417 		pp_smu = &clk_mgr->pp_smu->nv_funcs;
418 
419 		if (pp_smu->set_pme_wa_enable)
420 			pp_smu->set_pme_wa_enable(&pp_smu->pp_smu);
421 	}
422 }
423 
424 
dcn2_read_clocks_from_hw_dentist(struct clk_mgr * clk_mgr_base)425 void dcn2_read_clocks_from_hw_dentist(struct clk_mgr *clk_mgr_base)
426 {
427 	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
428 	uint32_t dispclk_wdivider;
429 	uint32_t dppclk_wdivider;
430 	int disp_divider;
431 	int dpp_divider;
432 
433 	REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DISPCLK_WDIVIDER, &dispclk_wdivider);
434 	REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DPPCLK_WDIVIDER, &dppclk_wdivider);
435 
436 	disp_divider = dentist_get_divider_from_did(dispclk_wdivider);
437 	dpp_divider = dentist_get_divider_from_did(dppclk_wdivider);
438 
439 	if (disp_divider && dpp_divider) {
440 		/* Calculate the current DFS clock, in kHz.*/
441 		clk_mgr_base->clks.dispclk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR
442 			* clk_mgr->base.dentist_vco_freq_khz) / disp_divider;
443 
444 		clk_mgr_base->clks.dppclk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR
445 				* clk_mgr->base.dentist_vco_freq_khz) / dpp_divider;
446 	}
447 }
448 
dcn2_get_clock(struct clk_mgr * clk_mgr,struct dc_state * context,enum dc_clock_type clock_type,struct dc_clock_config * clock_cfg)449 void dcn2_get_clock(struct clk_mgr *clk_mgr,
450 		struct dc_state *context,
451 			enum dc_clock_type clock_type,
452 			struct dc_clock_config *clock_cfg)
453 {
454 
455 	if (clock_type == DC_CLOCK_TYPE_DISPCLK) {
456 		clock_cfg->max_clock_khz = context->bw_ctx.bw.dcn.clk.max_supported_dispclk_khz;
457 		clock_cfg->min_clock_khz = DCN_MINIMUM_DISPCLK_Khz;
458 		clock_cfg->current_clock_khz = clk_mgr->clks.dispclk_khz;
459 		clock_cfg->bw_requirequired_clock_khz = context->bw_ctx.bw.dcn.clk.bw_dispclk_khz;
460 	}
461 	if (clock_type == DC_CLOCK_TYPE_DPPCLK) {
462 		clock_cfg->max_clock_khz = context->bw_ctx.bw.dcn.clk.max_supported_dppclk_khz;
463 		clock_cfg->min_clock_khz = DCN_MINIMUM_DPPCLK_Khz;
464 		clock_cfg->current_clock_khz = clk_mgr->clks.dppclk_khz;
465 		clock_cfg->bw_requirequired_clock_khz = context->bw_ctx.bw.dcn.clk.bw_dppclk_khz;
466 	}
467 }
468 
dcn2_are_clock_states_equal(struct dc_clocks * a,struct dc_clocks * b)469 static bool dcn2_are_clock_states_equal(struct dc_clocks *a,
470 		struct dc_clocks *b)
471 {
472 	if (a->dispclk_khz != b->dispclk_khz)
473 		return false;
474 	else if (a->dppclk_khz != b->dppclk_khz)
475 		return false;
476 	else if (a->disp_dpp_voltage_level_khz != b->disp_dpp_voltage_level_khz)
477 		return false;
478 	else if (a->dcfclk_khz != b->dcfclk_khz)
479 		return false;
480 	else if (a->socclk_khz != b->socclk_khz)
481 		return false;
482 	else if (a->dcfclk_deep_sleep_khz != b->dcfclk_deep_sleep_khz)
483 		return false;
484 	else if (a->dramclk_khz != b->dramclk_khz)
485 		return false;
486 	else if (a->p_state_change_support != b->p_state_change_support)
487 		return false;
488 
489 	return true;
490 }
491 
492 /* Notify clk_mgr of a change in link rate, update phyclk frequency if necessary */
dcn2_notify_link_rate_change(struct clk_mgr * clk_mgr_base,struct dc_link * link)493 static void dcn2_notify_link_rate_change(struct clk_mgr *clk_mgr_base, struct dc_link *link)
494 {
495 	struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
496 	unsigned int i, max_phyclk_req = 0;
497 	struct pp_smu_funcs_nv *pp_smu = NULL;
498 
499 	if (!clk_mgr->pp_smu || !clk_mgr->pp_smu->nv_funcs.set_voltage_by_freq)
500 		return;
501 
502 	pp_smu = &clk_mgr->pp_smu->nv_funcs;
503 
504 	clk_mgr->cur_phyclk_req_table[link->link_index] = link->cur_link_settings.link_rate * LINK_RATE_REF_FREQ_IN_KHZ;
505 
506 	for (i = 0; i < MAX_LINKS; i++) {
507 		if (clk_mgr->cur_phyclk_req_table[i] > max_phyclk_req)
508 			max_phyclk_req = clk_mgr->cur_phyclk_req_table[i];
509 	}
510 
511 	if (max_phyclk_req != clk_mgr_base->clks.phyclk_khz) {
512 		clk_mgr_base->clks.phyclk_khz = max_phyclk_req;
513 		pp_smu->set_voltage_by_freq(&pp_smu->pp_smu, PP_SMU_NV_PHYCLK, khz_to_mhz_ceil(clk_mgr_base->clks.phyclk_khz));
514 	}
515 }
516 
517 static struct clk_mgr_funcs dcn2_funcs = {
518 	.get_dp_ref_clk_frequency = dce12_get_dp_ref_freq_khz,
519 	.update_clocks = dcn2_update_clocks,
520 	.init_clocks = dcn2_init_clocks,
521 	.enable_pme_wa = dcn2_enable_pme_wa,
522 	.get_clock = dcn2_get_clock,
523 	.are_clock_states_equal = dcn2_are_clock_states_equal,
524 	.notify_link_rate_change = dcn2_notify_link_rate_change,
525 };
526 
527 
dcn20_clk_mgr_construct(struct dc_context * ctx,struct clk_mgr_internal * clk_mgr,struct pp_smu_funcs * pp_smu,struct dccg * dccg)528 void dcn20_clk_mgr_construct(
529 		struct dc_context *ctx,
530 		struct clk_mgr_internal *clk_mgr,
531 		struct pp_smu_funcs *pp_smu,
532 		struct dccg *dccg)
533 {
534 	int dprefclk_did;
535 	int target_div;
536 	uint32_t pll_req_reg;
537 	struct fixed31_32 pll_req;
538 
539 	clk_mgr->base.ctx = ctx;
540 	clk_mgr->pp_smu = pp_smu;
541 	clk_mgr->base.funcs = &dcn2_funcs;
542 	clk_mgr->regs = &clk_mgr_regs;
543 	clk_mgr->clk_mgr_shift = &clk_mgr_shift;
544 	clk_mgr->clk_mgr_mask = &clk_mgr_mask;
545 
546 	clk_mgr->dccg = dccg;
547 	clk_mgr->dfs_bypass_disp_clk = 0;
548 
549 	clk_mgr->dprefclk_ss_percentage = 0;
550 	clk_mgr->dprefclk_ss_divider = 1000;
551 	clk_mgr->ss_on_dprefclk = false;
552 
553 	clk_mgr->base.dprefclk_khz = 700000; // 700 MHz planned if VCO is 3.85 GHz, will be retrieved
554 
555 	/* DFS Slice 2 should be used for DPREFCLK */
556 	dprefclk_did = REG_READ(CLK3_CLK2_DFS_CNTL);
557 	/* Convert DPREFCLK DFS Slice DID to actual divider */
558 	target_div = dentist_get_divider_from_did(dprefclk_did);
559 	/* get FbMult value */
560 	pll_req_reg = REG_READ(CLK3_CLK_PLL_REQ);
561 
562 	/* set up a fixed-point number
563 	 * this works because the int part is on the right edge of the register
564 	 * and the frac part is on the left edge
565 	 */
566 
567 	pll_req = dc_fixpt_from_int(pll_req_reg & clk_mgr->clk_mgr_mask->FbMult_int);
568 	pll_req.value |= pll_req_reg & clk_mgr->clk_mgr_mask->FbMult_frac;
569 
570 	/* multiply by REFCLK period */
571 	pll_req = dc_fixpt_mul_int(pll_req, 100000);
572 
573 	/* integer part is now VCO frequency in kHz */
574 	clk_mgr->base.dentist_vco_freq_khz = dc_fixpt_floor(pll_req);
575 
576 	/* in case we don't get a value from the register, use default */
577 	if (clk_mgr->base.dentist_vco_freq_khz == 0)
578 		clk_mgr->base.dentist_vco_freq_khz = 3850000;
579 
580 	/* Calculate the DPREFCLK in kHz.*/
581 	clk_mgr->base.dprefclk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR
582 		* clk_mgr->base.dentist_vco_freq_khz) / target_div;
583 	//Integrated_info table does not exist on dGPU projects so should not be referenced
584 	//anywhere in code for dGPUs.
585 	//Also there is no plan for now that DFS BYPASS will be used on NV10/12/14.
586 	clk_mgr->dfs_bypass_enabled = false;
587 
588 	dce_clock_read_ss_info(clk_mgr);
589 }
590