1/*
2 * Copyright 2012-16 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
27#include "dccg.h"
28#include "clk_mgr_internal.h"
29#include "dce_clk_mgr.h"
30#include "dce110/dce110_clk_mgr.h"
31#include "dce112/dce112_clk_mgr.h"
32#include "reg_helper.h"
33#include "dmcu.h"
34#include "core_types.h"
35#include "dal_asic_id.h"
36
37/*
38 * Currently the register shifts and masks in this file are used for dce100 and dce80
39 * which has identical definitions.
40 * TODO: remove this when DPREFCLK_CNTL and dpref DENTIST_DISPCLK_CNTL
41 * is moved to dccg, where it belongs
42 */
43#include "dce/dce_8_0_d.h"
44#include "dce/dce_8_0_sh_mask.h"
45
46#define REG(reg) \
47 (clk_mgr->regs->reg)
48
49#undef FN
50#define FN(reg_name, field_name) \
51 clk_mgr->clk_mgr_shift->field_name, clk_mgr->clk_mgr_mask->field_name
52
53static const struct clk_mgr_registers disp_clk_regs = {
54 CLK_COMMON_REG_LIST_DCE_BASE()
55};
56
57static const struct clk_mgr_shift disp_clk_shift = {
58 CLK_COMMON_MASK_SH_LIST_DCE_COMMON_BASE(__SHIFT)
59};
60
61static const struct clk_mgr_mask disp_clk_mask = {
62 CLK_COMMON_MASK_SH_LIST_DCE_COMMON_BASE(_MASK)
63};
64
65
66/* Max clock values for each state indexed by "enum clocks_state": */
67static const struct state_dependent_clocks dce80_max_clks_by_state[] = {
68/* ClocksStateInvalid - should not be used */
69{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
70/* ClocksStateUltraLow - not expected to be used for DCE 8.0 */
71{ .display_clk_khz = 0, .pixel_clk_khz = 0 },
72/* ClocksStateLow */
73{ .display_clk_khz = 352000, .pixel_clk_khz = 330000},
74/* ClocksStateNominal */
75{ .display_clk_khz = 600000, .pixel_clk_khz = 400000 },
76/* ClocksStatePerformance */
77{ .display_clk_khz = 600000, .pixel_clk_khz = 400000 } };
78
79int dentist_get_divider_from_did(int did)
80{
81 if (did < DENTIST_BASE_DID_1)
82 did = DENTIST_BASE_DID_1;
83 if (did > DENTIST_MAX_DID)
84 did = DENTIST_MAX_DID;
85
86 if (did < DENTIST_BASE_DID_2) {
87 return DENTIST_DIVIDER_RANGE_1_START + DENTIST_DIVIDER_RANGE_1_STEP
88 * (did - DENTIST_BASE_DID_1);
89 } else if (did < DENTIST_BASE_DID_3) {
90 return DENTIST_DIVIDER_RANGE_2_START + DENTIST_DIVIDER_RANGE_2_STEP
91 * (did - DENTIST_BASE_DID_2);
92 } else if (did < DENTIST_BASE_DID_4) {
93 return DENTIST_DIVIDER_RANGE_3_START + DENTIST_DIVIDER_RANGE_3_STEP
94 * (did - DENTIST_BASE_DID_3);
95 } else {
96 return DENTIST_DIVIDER_RANGE_4_START + DENTIST_DIVIDER_RANGE_4_STEP
97 * (did - DENTIST_BASE_DID_4);
98 }
99}
100
101/* SW will adjust DP REF Clock average value for all purposes
102 * (DP DTO / DP Audio DTO and DP GTC)
103 if clock is spread for all cases:
104 -if SS enabled on DP Ref clock and HW de-spreading enabled with SW
105 calculations for DS_INCR/DS_MODULO (this is planned to be default case)
106 -if SS enabled on DP Ref clock and HW de-spreading enabled with HW
107 calculations (not planned to be used, but average clock should still
108 be valid)
109 -if SS enabled on DP Ref clock and HW de-spreading disabled
110 (should not be case with CIK) then SW should program all rates
111 generated according to average value (case as with previous ASICs)
112 */
113
114int dce_adjust_dp_ref_freq_for_ss(struct clk_mgr_internal *clk_mgr_dce, int dp_ref_clk_khz)
115{
116 if (clk_mgr_dce->ss_on_dprefclk && clk_mgr_dce->dprefclk_ss_divider != 0) {
117 struct fixed31_32 ss_percentage = dc_fixpt_div_int(
118 arg1: dc_fixpt_from_fraction(numerator: clk_mgr_dce->dprefclk_ss_percentage,
119 denominator: clk_mgr_dce->dprefclk_ss_divider), arg2: 200);
120 struct fixed31_32 adj_dp_ref_clk_khz;
121
122 ss_percentage = dc_fixpt_sub(arg1: dc_fixpt_one, arg2: ss_percentage);
123 adj_dp_ref_clk_khz = dc_fixpt_mul_int(arg1: ss_percentage, arg2: dp_ref_clk_khz);
124 dp_ref_clk_khz = dc_fixpt_floor(arg: adj_dp_ref_clk_khz);
125 }
126 return dp_ref_clk_khz;
127}
128
129int dce_get_dp_ref_freq_khz(struct clk_mgr *clk_mgr_base)
130{
131 struct clk_mgr_internal *clk_mgr = TO_CLK_MGR_INTERNAL(clk_mgr_base);
132 int dprefclk_wdivider;
133 int dprefclk_src_sel;
134 int dp_ref_clk_khz;
135 int target_div = 600000;
136
137 /* ASSERT DP Reference Clock source is from DFS*/
138 REG_GET(DPREFCLK_CNTL, DPREFCLK_SRC_SEL, &dprefclk_src_sel);
139 ASSERT(dprefclk_src_sel == 0);
140
141 /* Read the mmDENTIST_DISPCLK_CNTL to get the currently
142 * programmed DID DENTIST_DPREFCLK_WDIVIDER*/
143 REG_GET(DENTIST_DISPCLK_CNTL, DENTIST_DPREFCLK_WDIVIDER, &dprefclk_wdivider);
144
145 /* Convert DENTIST_DPREFCLK_WDIVIDERto actual divider*/
146 target_div = dentist_get_divider_from_did(did: dprefclk_wdivider);
147
148 /* Calculate the current DFS clock, in kHz.*/
149 dp_ref_clk_khz = (DENTIST_DIVIDER_RANGE_SCALE_FACTOR
150 * clk_mgr->base.dentist_vco_freq_khz) / target_div;
151
152 return dce_adjust_dp_ref_freq_for_ss(clk_mgr_dce: clk_mgr, dp_ref_clk_khz);
153}
154
155int dce12_get_dp_ref_freq_khz(struct clk_mgr *clk_mgr_base)
156{
157 struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base);
158
159 return dce_adjust_dp_ref_freq_for_ss(clk_mgr_dce, dp_ref_clk_khz: clk_mgr_base->dprefclk_khz);
160}
161
162/* unit: in_khz before mode set, get pixel clock from context. ASIC register
163 * may not be programmed yet
164 */
165uint32_t dce_get_max_pixel_clock_for_all_paths(struct dc_state *context)
166{
167 uint32_t max_pix_clk = 0;
168 int i;
169
170 for (i = 0; i < MAX_PIPES; i++) {
171 struct pipe_ctx *pipe_ctx = &context->res_ctx.pipe_ctx[i];
172
173 if (pipe_ctx->stream == NULL)
174 continue;
175
176 /* do not check under lay */
177 if (pipe_ctx->top_pipe)
178 continue;
179
180 if (pipe_ctx->stream_res.pix_clk_params.requested_pix_clk_100hz / 10 > max_pix_clk)
181 max_pix_clk = pipe_ctx->stream_res.pix_clk_params.requested_pix_clk_100hz / 10;
182
183 /* raise clock state for HBR3/2 if required. Confirmed with HW DCE/DPCS
184 * logic for HBR3 still needs Nominal (0.8V) on VDDC rail
185 */
186 if (dc_is_dp_signal(signal: pipe_ctx->stream->signal) &&
187 pipe_ctx->stream_res.pix_clk_params.requested_sym_clk > max_pix_clk)
188 max_pix_clk = pipe_ctx->stream_res.pix_clk_params.requested_sym_clk;
189 }
190
191 return max_pix_clk;
192}
193
194enum dm_pp_clocks_state dce_get_required_clocks_state(
195 struct clk_mgr *clk_mgr_base,
196 struct dc_state *context)
197{
198 struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base);
199 int i;
200 enum dm_pp_clocks_state low_req_clk;
201 int max_pix_clk = dce_get_max_pixel_clock_for_all_paths(context);
202
203 /* Iterate from highest supported to lowest valid state, and update
204 * lowest RequiredState with the lowest state that satisfies
205 * all required clocks
206 */
207 for (i = clk_mgr_dce->max_clks_state; i >= DM_PP_CLOCKS_STATE_ULTRA_LOW; i--)
208 if (context->bw_ctx.bw.dce.dispclk_khz >
209 clk_mgr_dce->max_clks_by_state[i].display_clk_khz
210 || max_pix_clk >
211 clk_mgr_dce->max_clks_by_state[i].pixel_clk_khz)
212 break;
213
214 low_req_clk = i + 1;
215 if (low_req_clk > clk_mgr_dce->max_clks_state) {
216 /* set max clock state for high phyclock, invalid on exceeding display clock */
217 if (clk_mgr_dce->max_clks_by_state[clk_mgr_dce->max_clks_state].display_clk_khz
218 < context->bw_ctx.bw.dce.dispclk_khz)
219 low_req_clk = DM_PP_CLOCKS_STATE_INVALID;
220 else
221 low_req_clk = clk_mgr_dce->max_clks_state;
222 }
223
224 return low_req_clk;
225}
226
227
228/* TODO: remove use the two broken down functions */
229int dce_set_clock(
230 struct clk_mgr *clk_mgr_base,
231 int requested_clk_khz)
232{
233 struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base);
234 struct bp_pixel_clock_parameters pxl_clk_params = { 0 };
235 struct dc_bios *bp = clk_mgr_base->ctx->dc_bios;
236 int actual_clock = requested_clk_khz;
237 struct dmcu *dmcu = clk_mgr_dce->base.ctx->dc->res_pool->dmcu;
238
239 /* Make sure requested clock isn't lower than minimum threshold*/
240 if (requested_clk_khz > 0)
241 requested_clk_khz = max(requested_clk_khz,
242 clk_mgr_dce->base.dentist_vco_freq_khz / 64);
243
244 /* Prepare to program display clock*/
245 pxl_clk_params.target_pixel_clock_100hz = requested_clk_khz * 10;
246 pxl_clk_params.pll_id = CLOCK_SOURCE_ID_DFS;
247
248 if (clk_mgr_dce->dfs_bypass_active)
249 pxl_clk_params.flags.SET_DISPCLK_DFS_BYPASS = true;
250
251 bp->funcs->program_display_engine_pll(bp, &pxl_clk_params);
252
253 if (clk_mgr_dce->dfs_bypass_active) {
254 /* Cache the fixed display clock*/
255 clk_mgr_dce->dfs_bypass_disp_clk =
256 pxl_clk_params.dfs_bypass_display_clock;
257 actual_clock = pxl_clk_params.dfs_bypass_display_clock;
258 }
259
260 /* from power down, we need mark the clock state as ClocksStateNominal
261 * from HWReset, so when resume we will call pplib voltage regulator.*/
262 if (requested_clk_khz == 0)
263 clk_mgr_dce->cur_min_clks_state = DM_PP_CLOCKS_STATE_NOMINAL;
264
265 if (dmcu && dmcu->funcs->is_dmcu_initialized(dmcu))
266 dmcu->funcs->set_psr_wait_loop(dmcu, actual_clock / 1000 / 7);
267
268 return actual_clock;
269}
270
271
272static void dce_clock_read_integrated_info(struct clk_mgr_internal *clk_mgr_dce)
273{
274 struct dc_debug_options *debug = &clk_mgr_dce->base.ctx->dc->debug;
275 struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios;
276 int i;
277
278 if (bp->integrated_info)
279 clk_mgr_dce->base.dentist_vco_freq_khz = bp->integrated_info->dentist_vco_freq;
280 if (clk_mgr_dce->base.dentist_vco_freq_khz == 0) {
281 clk_mgr_dce->base.dentist_vco_freq_khz = bp->fw_info.smu_gpu_pll_output_freq;
282 if (clk_mgr_dce->base.dentist_vco_freq_khz == 0)
283 clk_mgr_dce->base.dentist_vco_freq_khz = 3600000;
284 }
285
286 /*update the maximum display clock for each power state*/
287 for (i = 0; i < NUMBER_OF_DISP_CLK_VOLTAGE; ++i) {
288 enum dm_pp_clocks_state clk_state = DM_PP_CLOCKS_STATE_INVALID;
289
290 switch (i) {
291 case 0:
292 clk_state = DM_PP_CLOCKS_STATE_ULTRA_LOW;
293 break;
294
295 case 1:
296 clk_state = DM_PP_CLOCKS_STATE_LOW;
297 break;
298
299 case 2:
300 clk_state = DM_PP_CLOCKS_STATE_NOMINAL;
301 break;
302
303 case 3:
304 clk_state = DM_PP_CLOCKS_STATE_PERFORMANCE;
305 break;
306
307 default:
308 clk_state = DM_PP_CLOCKS_STATE_INVALID;
309 break;
310 }
311
312 /*Do not allow bad VBIOS/SBIOS to override with invalid values,
313 * check for > 100MHz*/
314 if (bp->integrated_info)
315 if (bp->integrated_info->disp_clk_voltage[i].max_supported_clk >= 100000)
316 clk_mgr_dce->max_clks_by_state[clk_state].display_clk_khz =
317 bp->integrated_info->disp_clk_voltage[i].max_supported_clk;
318 }
319
320 if (!debug->disable_dfs_bypass && bp->integrated_info)
321 if (bp->integrated_info->gpu_cap_info & DFS_BYPASS_ENABLE)
322 clk_mgr_dce->dfs_bypass_enabled = true;
323}
324
325void dce_clock_read_ss_info(struct clk_mgr_internal *clk_mgr_dce)
326{
327 struct dc_bios *bp = clk_mgr_dce->base.ctx->dc_bios;
328 int ss_info_num = bp->funcs->get_ss_entry_number(
329 bp, AS_SIGNAL_TYPE_GPU_PLL);
330
331 if (ss_info_num) {
332 struct spread_spectrum_info info = { { 0 } };
333 enum bp_result result = bp->funcs->get_spread_spectrum_info(
334 bp, AS_SIGNAL_TYPE_GPU_PLL, 0, &info);
335
336 /* Based on VBIOS, VBIOS will keep entry for GPU PLL SS
337 * even if SS not enabled and in that case
338 * SSInfo.spreadSpectrumPercentage !=0 would be sign
339 * that SS is enabled
340 */
341 if (result == BP_RESULT_OK &&
342 info.spread_spectrum_percentage != 0) {
343 clk_mgr_dce->ss_on_dprefclk = true;
344 clk_mgr_dce->dprefclk_ss_divider = info.spread_percentage_divider;
345
346 if (info.type.CENTER_MODE == 0) {
347 /* TODO: Currently for DP Reference clock we
348 * need only SS percentage for
349 * downspread */
350 clk_mgr_dce->dprefclk_ss_percentage =
351 info.spread_spectrum_percentage;
352 }
353
354 return;
355 }
356
357 result = bp->funcs->get_spread_spectrum_info(
358 bp, AS_SIGNAL_TYPE_DISPLAY_PORT, 0, &info);
359
360 /* Based on VBIOS, VBIOS will keep entry for DPREFCLK SS
361 * even if SS not enabled and in that case
362 * SSInfo.spreadSpectrumPercentage !=0 would be sign
363 * that SS is enabled
364 */
365 if (result == BP_RESULT_OK &&
366 info.spread_spectrum_percentage != 0) {
367 clk_mgr_dce->ss_on_dprefclk = true;
368 clk_mgr_dce->dprefclk_ss_divider = info.spread_percentage_divider;
369
370 if (info.type.CENTER_MODE == 0) {
371 /* Currently for DP Reference clock we
372 * need only SS percentage for
373 * downspread */
374 clk_mgr_dce->dprefclk_ss_percentage =
375 info.spread_spectrum_percentage;
376 }
377 if (clk_mgr_dce->base.ctx->dc->config.ignore_dpref_ss)
378 clk_mgr_dce->dprefclk_ss_percentage = 0;
379 }
380 }
381}
382
383static void dce_pplib_apply_display_requirements(
384 struct dc *dc,
385 struct dc_state *context)
386{
387 struct dm_pp_display_configuration *pp_display_cfg = &context->pp_display_cfg;
388
389 pp_display_cfg->avail_mclk_switch_time_us = dce110_get_min_vblank_time_us(context);
390
391 dce110_fill_display_configs(context, pp_display_cfg);
392
393 if (memcmp(p: &dc->current_state->pp_display_cfg, q: pp_display_cfg, size: sizeof(*pp_display_cfg)) != 0)
394 dm_pp_apply_display_requirements(ctx: dc->ctx, pp_display_cfg);
395}
396
397static void dce_update_clocks(struct clk_mgr *clk_mgr_base,
398 struct dc_state *context,
399 bool safe_to_lower)
400{
401 struct clk_mgr_internal *clk_mgr_dce = TO_CLK_MGR_INTERNAL(clk_mgr_base);
402 struct dm_pp_power_level_change_request level_change_req;
403 int patched_disp_clk = context->bw_ctx.bw.dce.dispclk_khz;
404
405 /*TODO: W/A for dal3 linux, investigate why this works */
406 if (!clk_mgr_dce->dfs_bypass_active)
407 patched_disp_clk = patched_disp_clk * 115 / 100;
408
409 level_change_req.power_level = dce_get_required_clocks_state(clk_mgr_base, context);
410 /* get max clock state from PPLIB */
411 if ((level_change_req.power_level < clk_mgr_dce->cur_min_clks_state && safe_to_lower)
412 || level_change_req.power_level > clk_mgr_dce->cur_min_clks_state) {
413 if (dm_pp_apply_power_level_change_request(ctx: clk_mgr_base->ctx, level_change_req: &level_change_req))
414 clk_mgr_dce->cur_min_clks_state = level_change_req.power_level;
415 }
416
417 if (should_set_clock(safe_to_lower, calc_clk: patched_disp_clk, cur_clk: clk_mgr_base->clks.dispclk_khz)) {
418 patched_disp_clk = dce_set_clock(clk_mgr_base, requested_clk_khz: patched_disp_clk);
419 clk_mgr_base->clks.dispclk_khz = patched_disp_clk;
420 }
421 dce_pplib_apply_display_requirements(dc: clk_mgr_base->ctx->dc, context);
422}
423
424
425
426
427
428
429
430
431static struct clk_mgr_funcs dce_funcs = {
432 .get_dp_ref_clk_frequency = dce_get_dp_ref_freq_khz,
433 .update_clocks = dce_update_clocks
434};
435
436void dce_clk_mgr_construct(
437 struct dc_context *ctx,
438 struct clk_mgr_internal *clk_mgr)
439{
440 struct clk_mgr *base = &clk_mgr->base;
441 struct dm_pp_static_clock_info static_clk_info = {0};
442
443 memcpy(clk_mgr->max_clks_by_state,
444 dce80_max_clks_by_state,
445 sizeof(dce80_max_clks_by_state));
446
447 base->ctx = ctx;
448 base->funcs = &dce_funcs;
449
450 clk_mgr->regs = &disp_clk_regs;
451 clk_mgr->clk_mgr_shift = &disp_clk_shift;
452 clk_mgr->clk_mgr_mask = &disp_clk_mask;
453 clk_mgr->dfs_bypass_disp_clk = 0;
454
455 clk_mgr->dprefclk_ss_percentage = 0;
456 clk_mgr->dprefclk_ss_divider = 1000;
457 clk_mgr->ss_on_dprefclk = false;
458
459 if (dm_pp_get_static_clocks(ctx, static_clk_info: &static_clk_info))
460 clk_mgr->max_clks_state = static_clk_info.max_clocks_state;
461 else
462 clk_mgr->max_clks_state = DM_PP_CLOCKS_STATE_NOMINAL;
463 clk_mgr->cur_min_clks_state = DM_PP_CLOCKS_STATE_INVALID;
464
465 dce_clock_read_integrated_info(clk_mgr_dce: clk_mgr);
466 dce_clock_read_ss_info(clk_mgr_dce: clk_mgr);
467}
468
469

source code of linux/drivers/gpu/drm/amd/display/dc/clk_mgr/dce100/dce_clk_mgr.c