1 /*
2 * Copyright 2011 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: Alex Deucher
23 */
24
25 #include <drm/drmP.h>
26 #include "radeon.h"
27 #include "rv740d.h"
28 #include "r600_dpm.h"
29 #include "rv770_dpm.h"
30 #include "atom.h"
31
32 struct rv7xx_power_info *rv770_get_pi(struct radeon_device *rdev);
33
rv740_get_decoded_reference_divider(u32 encoded_ref)34 u32 rv740_get_decoded_reference_divider(u32 encoded_ref)
35 {
36 u32 ref = 0;
37
38 switch (encoded_ref) {
39 case 0:
40 ref = 1;
41 break;
42 case 16:
43 ref = 2;
44 break;
45 case 17:
46 ref = 3;
47 break;
48 case 18:
49 ref = 2;
50 break;
51 case 19:
52 ref = 3;
53 break;
54 case 20:
55 ref = 4;
56 break;
57 case 21:
58 ref = 5;
59 break;
60 default:
61 DRM_ERROR("Invalid encoded Reference Divider\n");
62 ref = 0;
63 break;
64 }
65
66 return ref;
67 }
68
69 struct dll_speed_setting {
70 u16 min;
71 u16 max;
72 u32 dll_speed;
73 };
74
75 static struct dll_speed_setting dll_speed_table[16] =
76 {
77 { 270, 320, 0x0f },
78 { 240, 270, 0x0e },
79 { 200, 240, 0x0d },
80 { 180, 200, 0x0c },
81 { 160, 180, 0x0b },
82 { 140, 160, 0x0a },
83 { 120, 140, 0x09 },
84 { 110, 120, 0x08 },
85 { 95, 110, 0x07 },
86 { 85, 95, 0x06 },
87 { 78, 85, 0x05 },
88 { 70, 78, 0x04 },
89 { 65, 70, 0x03 },
90 { 60, 65, 0x02 },
91 { 42, 60, 0x01 },
92 { 00, 42, 0x00 }
93 };
94
rv740_get_dll_speed(bool is_gddr5,u32 memory_clock)95 u32 rv740_get_dll_speed(bool is_gddr5, u32 memory_clock)
96 {
97 int i;
98 u32 factor;
99 u16 data_rate;
100
101 if (is_gddr5)
102 factor = 4;
103 else
104 factor = 2;
105
106 data_rate = (u16)(memory_clock * factor / 1000);
107
108 if (data_rate < dll_speed_table[0].max) {
109 for (i = 0; i < 16; i++) {
110 if (data_rate > dll_speed_table[i].min &&
111 data_rate <= dll_speed_table[i].max)
112 return dll_speed_table[i].dll_speed;
113 }
114 }
115
116 DRM_DEBUG_KMS("Target MCLK greater than largest MCLK in DLL speed table\n");
117
118 return 0x0f;
119 }
120
rv740_populate_sclk_value(struct radeon_device * rdev,u32 engine_clock,RV770_SMC_SCLK_VALUE * sclk)121 int rv740_populate_sclk_value(struct radeon_device *rdev, u32 engine_clock,
122 RV770_SMC_SCLK_VALUE *sclk)
123 {
124 struct rv7xx_power_info *pi = rv770_get_pi(rdev);
125 struct atom_clock_dividers dividers;
126 u32 spll_func_cntl = pi->clk_regs.rv770.cg_spll_func_cntl;
127 u32 spll_func_cntl_2 = pi->clk_regs.rv770.cg_spll_func_cntl_2;
128 u32 spll_func_cntl_3 = pi->clk_regs.rv770.cg_spll_func_cntl_3;
129 u32 cg_spll_spread_spectrum = pi->clk_regs.rv770.cg_spll_spread_spectrum;
130 u32 cg_spll_spread_spectrum_2 = pi->clk_regs.rv770.cg_spll_spread_spectrum_2;
131 u64 tmp;
132 u32 reference_clock = rdev->clock.spll.reference_freq;
133 u32 reference_divider;
134 u32 fbdiv;
135 int ret;
136
137 ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_ENGINE_PLL_PARAM,
138 engine_clock, false, ÷rs);
139 if (ret)
140 return ret;
141
142 reference_divider = 1 + dividers.ref_div;
143
144 tmp = (u64) engine_clock * reference_divider * dividers.post_div * 16384;
145 do_div(tmp, reference_clock);
146 fbdiv = (u32) tmp;
147
148 spll_func_cntl &= ~(SPLL_PDIV_A_MASK | SPLL_REF_DIV_MASK);
149 spll_func_cntl |= SPLL_REF_DIV(dividers.ref_div);
150 spll_func_cntl |= SPLL_PDIV_A(dividers.post_div);
151
152 spll_func_cntl_2 &= ~SCLK_MUX_SEL_MASK;
153 spll_func_cntl_2 |= SCLK_MUX_SEL(2);
154
155 spll_func_cntl_3 &= ~SPLL_FB_DIV_MASK;
156 spll_func_cntl_3 |= SPLL_FB_DIV(fbdiv);
157 spll_func_cntl_3 |= SPLL_DITHEN;
158
159 if (pi->sclk_ss) {
160 struct radeon_atom_ss ss;
161 u32 vco_freq = engine_clock * dividers.post_div;
162
163 if (radeon_atombios_get_asic_ss_info(rdev, &ss,
164 ASIC_INTERNAL_ENGINE_SS, vco_freq)) {
165 u32 clk_s = reference_clock * 5 / (reference_divider * ss.rate);
166 u32 clk_v = 4 * ss.percentage * fbdiv / (clk_s * 10000);
167
168 cg_spll_spread_spectrum &= ~CLK_S_MASK;
169 cg_spll_spread_spectrum |= CLK_S(clk_s);
170 cg_spll_spread_spectrum |= SSEN;
171
172 cg_spll_spread_spectrum_2 &= ~CLK_V_MASK;
173 cg_spll_spread_spectrum_2 |= CLK_V(clk_v);
174 }
175 }
176
177 sclk->sclk_value = cpu_to_be32(engine_clock);
178 sclk->vCG_SPLL_FUNC_CNTL = cpu_to_be32(spll_func_cntl);
179 sclk->vCG_SPLL_FUNC_CNTL_2 = cpu_to_be32(spll_func_cntl_2);
180 sclk->vCG_SPLL_FUNC_CNTL_3 = cpu_to_be32(spll_func_cntl_3);
181 sclk->vCG_SPLL_SPREAD_SPECTRUM = cpu_to_be32(cg_spll_spread_spectrum);
182 sclk->vCG_SPLL_SPREAD_SPECTRUM_2 = cpu_to_be32(cg_spll_spread_spectrum_2);
183
184 return 0;
185 }
186
rv740_populate_mclk_value(struct radeon_device * rdev,u32 engine_clock,u32 memory_clock,RV7XX_SMC_MCLK_VALUE * mclk)187 int rv740_populate_mclk_value(struct radeon_device *rdev,
188 u32 engine_clock, u32 memory_clock,
189 RV7XX_SMC_MCLK_VALUE *mclk)
190 {
191 struct rv7xx_power_info *pi = rv770_get_pi(rdev);
192 u32 mpll_ad_func_cntl = pi->clk_regs.rv770.mpll_ad_func_cntl;
193 u32 mpll_ad_func_cntl_2 = pi->clk_regs.rv770.mpll_ad_func_cntl_2;
194 u32 mpll_dq_func_cntl = pi->clk_regs.rv770.mpll_dq_func_cntl;
195 u32 mpll_dq_func_cntl_2 = pi->clk_regs.rv770.mpll_dq_func_cntl_2;
196 u32 mclk_pwrmgt_cntl = pi->clk_regs.rv770.mclk_pwrmgt_cntl;
197 u32 dll_cntl = pi->clk_regs.rv770.dll_cntl;
198 u32 mpll_ss1 = pi->clk_regs.rv770.mpll_ss1;
199 u32 mpll_ss2 = pi->clk_regs.rv770.mpll_ss2;
200 struct atom_clock_dividers dividers;
201 u32 ibias;
202 u32 dll_speed;
203 int ret;
204
205 ret = radeon_atom_get_clock_dividers(rdev, COMPUTE_MEMORY_PLL_PARAM,
206 memory_clock, false, ÷rs);
207 if (ret)
208 return ret;
209
210 ibias = rv770_map_clkf_to_ibias(rdev, dividers.whole_fb_div);
211
212 mpll_ad_func_cntl &= ~(CLKR_MASK |
213 YCLK_POST_DIV_MASK |
214 CLKF_MASK |
215 CLKFRAC_MASK |
216 IBIAS_MASK);
217 mpll_ad_func_cntl |= CLKR(dividers.ref_div);
218 mpll_ad_func_cntl |= YCLK_POST_DIV(dividers.post_div);
219 mpll_ad_func_cntl |= CLKF(dividers.whole_fb_div);
220 mpll_ad_func_cntl |= CLKFRAC(dividers.frac_fb_div);
221 mpll_ad_func_cntl |= IBIAS(ibias);
222
223 if (dividers.vco_mode)
224 mpll_ad_func_cntl_2 |= VCO_MODE;
225 else
226 mpll_ad_func_cntl_2 &= ~VCO_MODE;
227
228 if (pi->mem_gddr5) {
229 mpll_dq_func_cntl &= ~(CLKR_MASK |
230 YCLK_POST_DIV_MASK |
231 CLKF_MASK |
232 CLKFRAC_MASK |
233 IBIAS_MASK);
234 mpll_dq_func_cntl |= CLKR(dividers.ref_div);
235 mpll_dq_func_cntl |= YCLK_POST_DIV(dividers.post_div);
236 mpll_dq_func_cntl |= CLKF(dividers.whole_fb_div);
237 mpll_dq_func_cntl |= CLKFRAC(dividers.frac_fb_div);
238 mpll_dq_func_cntl |= IBIAS(ibias);
239
240 if (dividers.vco_mode)
241 mpll_dq_func_cntl_2 |= VCO_MODE;
242 else
243 mpll_dq_func_cntl_2 &= ~VCO_MODE;
244 }
245
246 if (pi->mclk_ss) {
247 struct radeon_atom_ss ss;
248 u32 vco_freq = memory_clock * dividers.post_div;
249
250 if (radeon_atombios_get_asic_ss_info(rdev, &ss,
251 ASIC_INTERNAL_MEMORY_SS, vco_freq)) {
252 u32 reference_clock = rdev->clock.mpll.reference_freq;
253 u32 decoded_ref = rv740_get_decoded_reference_divider(dividers.ref_div);
254 u32 clk_s = reference_clock * 5 / (decoded_ref * ss.rate);
255 u32 clk_v = 0x40000 * ss.percentage *
256 (dividers.whole_fb_div + (dividers.frac_fb_div / 8)) / (clk_s * 10000);
257
258 mpll_ss1 &= ~CLKV_MASK;
259 mpll_ss1 |= CLKV(clk_v);
260
261 mpll_ss2 &= ~CLKS_MASK;
262 mpll_ss2 |= CLKS(clk_s);
263 }
264 }
265
266 dll_speed = rv740_get_dll_speed(pi->mem_gddr5,
267 memory_clock);
268
269 mclk_pwrmgt_cntl &= ~DLL_SPEED_MASK;
270 mclk_pwrmgt_cntl |= DLL_SPEED(dll_speed);
271
272 mclk->mclk770.mclk_value = cpu_to_be32(memory_clock);
273 mclk->mclk770.vMPLL_AD_FUNC_CNTL = cpu_to_be32(mpll_ad_func_cntl);
274 mclk->mclk770.vMPLL_AD_FUNC_CNTL_2 = cpu_to_be32(mpll_ad_func_cntl_2);
275 mclk->mclk770.vMPLL_DQ_FUNC_CNTL = cpu_to_be32(mpll_dq_func_cntl);
276 mclk->mclk770.vMPLL_DQ_FUNC_CNTL_2 = cpu_to_be32(mpll_dq_func_cntl_2);
277 mclk->mclk770.vMCLK_PWRMGT_CNTL = cpu_to_be32(mclk_pwrmgt_cntl);
278 mclk->mclk770.vDLL_CNTL = cpu_to_be32(dll_cntl);
279 mclk->mclk770.vMPLL_SS = cpu_to_be32(mpll_ss1);
280 mclk->mclk770.vMPLL_SS2 = cpu_to_be32(mpll_ss2);
281
282 return 0;
283 }
284
rv740_read_clock_registers(struct radeon_device * rdev)285 void rv740_read_clock_registers(struct radeon_device *rdev)
286 {
287 struct rv7xx_power_info *pi = rv770_get_pi(rdev);
288
289 pi->clk_regs.rv770.cg_spll_func_cntl =
290 RREG32(CG_SPLL_FUNC_CNTL);
291 pi->clk_regs.rv770.cg_spll_func_cntl_2 =
292 RREG32(CG_SPLL_FUNC_CNTL_2);
293 pi->clk_regs.rv770.cg_spll_func_cntl_3 =
294 RREG32(CG_SPLL_FUNC_CNTL_3);
295 pi->clk_regs.rv770.cg_spll_spread_spectrum =
296 RREG32(CG_SPLL_SPREAD_SPECTRUM);
297 pi->clk_regs.rv770.cg_spll_spread_spectrum_2 =
298 RREG32(CG_SPLL_SPREAD_SPECTRUM_2);
299
300 pi->clk_regs.rv770.mpll_ad_func_cntl =
301 RREG32(MPLL_AD_FUNC_CNTL);
302 pi->clk_regs.rv770.mpll_ad_func_cntl_2 =
303 RREG32(MPLL_AD_FUNC_CNTL_2);
304 pi->clk_regs.rv770.mpll_dq_func_cntl =
305 RREG32(MPLL_DQ_FUNC_CNTL);
306 pi->clk_regs.rv770.mpll_dq_func_cntl_2 =
307 RREG32(MPLL_DQ_FUNC_CNTL_2);
308 pi->clk_regs.rv770.mclk_pwrmgt_cntl =
309 RREG32(MCLK_PWRMGT_CNTL);
310 pi->clk_regs.rv770.dll_cntl = RREG32(DLL_CNTL);
311 pi->clk_regs.rv770.mpll_ss1 = RREG32(MPLL_SS1);
312 pi->clk_regs.rv770.mpll_ss2 = RREG32(MPLL_SS2);
313 }
314
rv740_populate_smc_acpi_state(struct radeon_device * rdev,RV770_SMC_STATETABLE * table)315 int rv740_populate_smc_acpi_state(struct radeon_device *rdev,
316 RV770_SMC_STATETABLE *table)
317 {
318 struct rv7xx_power_info *pi = rv770_get_pi(rdev);
319 u32 mpll_ad_func_cntl = pi->clk_regs.rv770.mpll_ad_func_cntl;
320 u32 mpll_ad_func_cntl_2 = pi->clk_regs.rv770.mpll_ad_func_cntl_2;
321 u32 mpll_dq_func_cntl = pi->clk_regs.rv770.mpll_dq_func_cntl;
322 u32 mpll_dq_func_cntl_2 = pi->clk_regs.rv770.mpll_dq_func_cntl_2;
323 u32 spll_func_cntl = pi->clk_regs.rv770.cg_spll_func_cntl;
324 u32 spll_func_cntl_2 = pi->clk_regs.rv770.cg_spll_func_cntl_2;
325 u32 spll_func_cntl_3 = pi->clk_regs.rv770.cg_spll_func_cntl_3;
326 u32 mclk_pwrmgt_cntl = pi->clk_regs.rv770.mclk_pwrmgt_cntl;
327 u32 dll_cntl = pi->clk_regs.rv770.dll_cntl;
328
329 table->ACPIState = table->initialState;
330
331 table->ACPIState.flags &= ~PPSMC_SWSTATE_FLAG_DC;
332
333 if (pi->acpi_vddc) {
334 rv770_populate_vddc_value(rdev, pi->acpi_vddc,
335 &table->ACPIState.levels[0].vddc);
336 table->ACPIState.levels[0].gen2PCIE =
337 pi->pcie_gen2 ?
338 pi->acpi_pcie_gen2 : 0;
339 table->ACPIState.levels[0].gen2XSP =
340 pi->acpi_pcie_gen2;
341 } else {
342 rv770_populate_vddc_value(rdev, pi->min_vddc_in_table,
343 &table->ACPIState.levels[0].vddc);
344 table->ACPIState.levels[0].gen2PCIE = 0;
345 }
346
347 mpll_ad_func_cntl_2 |= BIAS_GEN_PDNB | RESET_EN;
348
349 mpll_dq_func_cntl_2 |= BYPASS | BIAS_GEN_PDNB | RESET_EN;
350
351 mclk_pwrmgt_cntl |= (MRDCKA0_RESET |
352 MRDCKA1_RESET |
353 MRDCKB0_RESET |
354 MRDCKB1_RESET |
355 MRDCKC0_RESET |
356 MRDCKC1_RESET |
357 MRDCKD0_RESET |
358 MRDCKD1_RESET);
359
360 dll_cntl |= (MRDCKA0_BYPASS |
361 MRDCKA1_BYPASS |
362 MRDCKB0_BYPASS |
363 MRDCKB1_BYPASS |
364 MRDCKC0_BYPASS |
365 MRDCKC1_BYPASS |
366 MRDCKD0_BYPASS |
367 MRDCKD1_BYPASS);
368
369 spll_func_cntl |= SPLL_RESET | SPLL_SLEEP | SPLL_BYPASS_EN;
370
371 spll_func_cntl_2 &= ~SCLK_MUX_SEL_MASK;
372 spll_func_cntl_2 |= SCLK_MUX_SEL(4);
373
374 table->ACPIState.levels[0].mclk.mclk770.vMPLL_AD_FUNC_CNTL = cpu_to_be32(mpll_ad_func_cntl);
375 table->ACPIState.levels[0].mclk.mclk770.vMPLL_AD_FUNC_CNTL_2 = cpu_to_be32(mpll_ad_func_cntl_2);
376 table->ACPIState.levels[0].mclk.mclk770.vMPLL_DQ_FUNC_CNTL = cpu_to_be32(mpll_dq_func_cntl);
377 table->ACPIState.levels[0].mclk.mclk770.vMPLL_DQ_FUNC_CNTL_2 = cpu_to_be32(mpll_dq_func_cntl_2);
378 table->ACPIState.levels[0].mclk.mclk770.vMCLK_PWRMGT_CNTL = cpu_to_be32(mclk_pwrmgt_cntl);
379 table->ACPIState.levels[0].mclk.mclk770.vDLL_CNTL = cpu_to_be32(dll_cntl);
380
381 table->ACPIState.levels[0].mclk.mclk770.mclk_value = 0;
382
383 table->ACPIState.levels[0].sclk.vCG_SPLL_FUNC_CNTL = cpu_to_be32(spll_func_cntl);
384 table->ACPIState.levels[0].sclk.vCG_SPLL_FUNC_CNTL_2 = cpu_to_be32(spll_func_cntl_2);
385 table->ACPIState.levels[0].sclk.vCG_SPLL_FUNC_CNTL_3 = cpu_to_be32(spll_func_cntl_3);
386
387 table->ACPIState.levels[0].sclk.sclk_value = 0;
388
389 table->ACPIState.levels[1] = table->ACPIState.levels[0];
390 table->ACPIState.levels[2] = table->ACPIState.levels[0];
391
392 rv770_populate_mvdd_value(rdev, 0, &table->ACPIState.levels[0].mvdd);
393
394 return 0;
395 }
396
rv740_enable_mclk_spread_spectrum(struct radeon_device * rdev,bool enable)397 void rv740_enable_mclk_spread_spectrum(struct radeon_device *rdev,
398 bool enable)
399 {
400 if (enable)
401 WREG32_P(MPLL_CNTL_MODE, SS_SSEN, ~SS_SSEN);
402 else
403 WREG32_P(MPLL_CNTL_MODE, 0, ~SS_SSEN);
404 }
405
rv740_get_mclk_frequency_ratio(u32 memory_clock)406 u8 rv740_get_mclk_frequency_ratio(u32 memory_clock)
407 {
408 u8 mc_para_index;
409
410 if ((memory_clock < 10000) || (memory_clock > 47500))
411 mc_para_index = 0x00;
412 else
413 mc_para_index = (u8)((memory_clock - 10000) / 2500);
414
415 return mc_para_index;
416 }
417