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i2c-eg20t: change timeout value 50msec to 1000msec
[zen-stable.git] / drivers / gpu / drm / i915 / i915_suspend.c
blob2b5eb229ff2cc1c443d7f01039a4cc308201d211
1 /*
2 *
3 * Copyright 2008 (c) Intel Corporation
4 * Jesse Barnes <jbarnes@virtuousgeek.org>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 */
26
27 #include "drmP.h"
28 #include "drm.h"
29 #include "i915_drm.h"
30 #include "intel_drv.h"
31 #include "i915_reg.h"
32
33 static bool i915_pipe_enabled(struct drm_device *dev, enum pipe pipe)
34 {
35 struct drm_i915_private *dev_priv = dev->dev_private;
36 u32 dpll_reg;
37
38 /* On IVB, 3rd pipe shares PLL with another one */
39 if (pipe > 1)
40 return false;
41
42 if (HAS_PCH_SPLIT(dev))
43 dpll_reg = PCH_DPLL(pipe);
44 else
45 dpll_reg = (pipe == PIPE_A) ? _DPLL_A : _DPLL_B;
46
47 return (I915_READ(dpll_reg) & DPLL_VCO_ENABLE);
48 }
49
50 static void i915_save_palette(struct drm_device *dev, enum pipe pipe)
51 {
52 struct drm_i915_private *dev_priv = dev->dev_private;
53 unsigned long reg = (pipe == PIPE_A ? _PALETTE_A : _PALETTE_B);
54 u32 *array;
55 int i;
56
57 if (!i915_pipe_enabled(dev, pipe))
58 return;
59
60 if (HAS_PCH_SPLIT(dev))
61 reg = (pipe == PIPE_A) ? _LGC_PALETTE_A : _LGC_PALETTE_B;
62
63 if (pipe == PIPE_A)
64 array = dev_priv->save_palette_a;
65 else
66 array = dev_priv->save_palette_b;
67
68 for (i = 0; i < 256; i++)
69 array[i] = I915_READ(reg + (i << 2));
70 }
71
72 static void i915_restore_palette(struct drm_device *dev, enum pipe pipe)
73 {
74 struct drm_i915_private *dev_priv = dev->dev_private;
75 unsigned long reg = (pipe == PIPE_A ? _PALETTE_A : _PALETTE_B);
76 u32 *array;
77 int i;
78
79 if (!i915_pipe_enabled(dev, pipe))
80 return;
81
82 if (HAS_PCH_SPLIT(dev))
83 reg = (pipe == PIPE_A) ? _LGC_PALETTE_A : _LGC_PALETTE_B;
84
85 if (pipe == PIPE_A)
86 array = dev_priv->save_palette_a;
87 else
88 array = dev_priv->save_palette_b;
89
90 for (i = 0; i < 256; i++)
91 I915_WRITE(reg + (i << 2), array[i]);
92 }
93
94 static u8 i915_read_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg)
95 {
96 struct drm_i915_private *dev_priv = dev->dev_private;
97
98 I915_WRITE8(index_port, reg);
99 return I915_READ8(data_port);
100 }
101
102 static u8 i915_read_ar(struct drm_device *dev, u16 st01, u8 reg, u16 palette_enable)
103 {
104 struct drm_i915_private *dev_priv = dev->dev_private;
105
106 I915_READ8(st01);
107 I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
108 return I915_READ8(VGA_AR_DATA_READ);
109 }
110
111 static void i915_write_ar(struct drm_device *dev, u16 st01, u8 reg, u8 val, u16 palette_enable)
112 {
113 struct drm_i915_private *dev_priv = dev->dev_private;
114
115 I915_READ8(st01);
116 I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
117 I915_WRITE8(VGA_AR_DATA_WRITE, val);
118 }
119
120 static void i915_write_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg, u8 val)
121 {
122 struct drm_i915_private *dev_priv = dev->dev_private;
123
124 I915_WRITE8(index_port, reg);
125 I915_WRITE8(data_port, val);
126 }
127
128 static void i915_save_vga(struct drm_device *dev)
129 {
130 struct drm_i915_private *dev_priv = dev->dev_private;
131 int i;
132 u16 cr_index, cr_data, st01;
133
134 /* VGA color palette registers */
135 dev_priv->saveDACMASK = I915_READ8(VGA_DACMASK);
136
137 /* MSR bits */
138 dev_priv->saveMSR = I915_READ8(VGA_MSR_READ);
139 if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
140 cr_index = VGA_CR_INDEX_CGA;
141 cr_data = VGA_CR_DATA_CGA;
142 st01 = VGA_ST01_CGA;
143 } else {
144 cr_index = VGA_CR_INDEX_MDA;
145 cr_data = VGA_CR_DATA_MDA;
146 st01 = VGA_ST01_MDA;
147 }
148
149 /* CRT controller regs */
150 i915_write_indexed(dev, cr_index, cr_data, 0x11,
151 i915_read_indexed(dev, cr_index, cr_data, 0x11) &
152 (~0x80));
153 for (i = 0; i <= 0x24; i++)
154 dev_priv->saveCR[i] =
155 i915_read_indexed(dev, cr_index, cr_data, i);
156 /* Make sure we don't turn off CR group 0 writes */
157 dev_priv->saveCR[0x11] &= ~0x80;
158
159 /* Attribute controller registers */
160 I915_READ8(st01);
161 dev_priv->saveAR_INDEX = I915_READ8(VGA_AR_INDEX);
162 for (i = 0; i <= 0x14; i++)
163 dev_priv->saveAR[i] = i915_read_ar(dev, st01, i, 0);
164 I915_READ8(st01);
165 I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX);
166 I915_READ8(st01);
167
168 /* Graphics controller registers */
169 for (i = 0; i < 9; i++)
170 dev_priv->saveGR[i] =
171 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i);
172
173 dev_priv->saveGR[0x10] =
174 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10);
175 dev_priv->saveGR[0x11] =
176 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11);
177 dev_priv->saveGR[0x18] =
178 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18);
179
180 /* Sequencer registers */
181 for (i = 0; i < 8; i++)
182 dev_priv->saveSR[i] =
183 i915_read_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i);
184 }
185
186 static void i915_restore_vga(struct drm_device *dev)
187 {
188 struct drm_i915_private *dev_priv = dev->dev_private;
189 int i;
190 u16 cr_index, cr_data, st01;
191
192 /* MSR bits */
193 I915_WRITE8(VGA_MSR_WRITE, dev_priv->saveMSR);
194 if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
195 cr_index = VGA_CR_INDEX_CGA;
196 cr_data = VGA_CR_DATA_CGA;
197 st01 = VGA_ST01_CGA;
198 } else {
199 cr_index = VGA_CR_INDEX_MDA;
200 cr_data = VGA_CR_DATA_MDA;
201 st01 = VGA_ST01_MDA;
202 }
203
204 /* Sequencer registers, don't write SR07 */
205 for (i = 0; i < 7; i++)
206 i915_write_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i,
207 dev_priv->saveSR[i]);
208
209 /* CRT controller regs */
210 /* Enable CR group 0 writes */
211 i915_write_indexed(dev, cr_index, cr_data, 0x11, dev_priv->saveCR[0x11]);
212 for (i = 0; i <= 0x24; i++)
213 i915_write_indexed(dev, cr_index, cr_data, i, dev_priv->saveCR[i]);
214
215 /* Graphics controller regs */
216 for (i = 0; i < 9; i++)
217 i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i,
218 dev_priv->saveGR[i]);
219
220 i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10,
221 dev_priv->saveGR[0x10]);
222 i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11,
223 dev_priv->saveGR[0x11]);
224 i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18,
225 dev_priv->saveGR[0x18]);
226
227 /* Attribute controller registers */
228 I915_READ8(st01); /* switch back to index mode */
229 for (i = 0; i <= 0x14; i++)
230 i915_write_ar(dev, st01, i, dev_priv->saveAR[i], 0);
231 I915_READ8(st01); /* switch back to index mode */
232 I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX | 0x20);
233 I915_READ8(st01);
234
235 /* VGA color palette registers */
236 I915_WRITE8(VGA_DACMASK, dev_priv->saveDACMASK);
237 }
238
239 static void i915_save_modeset_reg(struct drm_device *dev)
240 {
241 struct drm_i915_private *dev_priv = dev->dev_private;
242 int i;
243
244 if (drm_core_check_feature(dev, DRIVER_MODESET))
245 return;
246
247 /* Cursor state */
248 dev_priv->saveCURACNTR = I915_READ(_CURACNTR);
249 dev_priv->saveCURAPOS = I915_READ(_CURAPOS);
250 dev_priv->saveCURABASE = I915_READ(_CURABASE);
251 dev_priv->saveCURBCNTR = I915_READ(_CURBCNTR);
252 dev_priv->saveCURBPOS = I915_READ(_CURBPOS);
253 dev_priv->saveCURBBASE = I915_READ(_CURBBASE);
254 if (IS_GEN2(dev))
255 dev_priv->saveCURSIZE = I915_READ(CURSIZE);
256
257 if (HAS_PCH_SPLIT(dev)) {
258 dev_priv->savePCH_DREF_CONTROL = I915_READ(PCH_DREF_CONTROL);
259 dev_priv->saveDISP_ARB_CTL = I915_READ(DISP_ARB_CTL);
260 }
261
262 /* Pipe & plane A info */
263 dev_priv->savePIPEACONF = I915_READ(_PIPEACONF);
264 dev_priv->savePIPEASRC = I915_READ(_PIPEASRC);
265 if (HAS_PCH_SPLIT(dev)) {
266 dev_priv->saveFPA0 = I915_READ(_PCH_FPA0);
267 dev_priv->saveFPA1 = I915_READ(_PCH_FPA1);
268 dev_priv->saveDPLL_A = I915_READ(_PCH_DPLL_A);
269 } else {
270 dev_priv->saveFPA0 = I915_READ(_FPA0);
271 dev_priv->saveFPA1 = I915_READ(_FPA1);
272 dev_priv->saveDPLL_A = I915_READ(_DPLL_A);
273 }
274 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
275 dev_priv->saveDPLL_A_MD = I915_READ(_DPLL_A_MD);
276 dev_priv->saveHTOTAL_A = I915_READ(_HTOTAL_A);
277 dev_priv->saveHBLANK_A = I915_READ(_HBLANK_A);
278 dev_priv->saveHSYNC_A = I915_READ(_HSYNC_A);
279 dev_priv->saveVTOTAL_A = I915_READ(_VTOTAL_A);
280 dev_priv->saveVBLANK_A = I915_READ(_VBLANK_A);
281 dev_priv->saveVSYNC_A = I915_READ(_VSYNC_A);
282 if (!HAS_PCH_SPLIT(dev))
283 dev_priv->saveBCLRPAT_A = I915_READ(_BCLRPAT_A);
284
285 if (HAS_PCH_SPLIT(dev)) {
286 dev_priv->savePIPEA_DATA_M1 = I915_READ(_PIPEA_DATA_M1);
287 dev_priv->savePIPEA_DATA_N1 = I915_READ(_PIPEA_DATA_N1);
288 dev_priv->savePIPEA_LINK_M1 = I915_READ(_PIPEA_LINK_M1);
289 dev_priv->savePIPEA_LINK_N1 = I915_READ(_PIPEA_LINK_N1);
290
291 dev_priv->saveFDI_TXA_CTL = I915_READ(_FDI_TXA_CTL);
292 dev_priv->saveFDI_RXA_CTL = I915_READ(_FDI_RXA_CTL);
293
294 dev_priv->savePFA_CTL_1 = I915_READ(_PFA_CTL_1);
295 dev_priv->savePFA_WIN_SZ = I915_READ(_PFA_WIN_SZ);
296 dev_priv->savePFA_WIN_POS = I915_READ(_PFA_WIN_POS);
297
298 dev_priv->saveTRANSACONF = I915_READ(_TRANSACONF);
299 dev_priv->saveTRANS_HTOTAL_A = I915_READ(_TRANS_HTOTAL_A);
300 dev_priv->saveTRANS_HBLANK_A = I915_READ(_TRANS_HBLANK_A);
301 dev_priv->saveTRANS_HSYNC_A = I915_READ(_TRANS_HSYNC_A);
302 dev_priv->saveTRANS_VTOTAL_A = I915_READ(_TRANS_VTOTAL_A);
303 dev_priv->saveTRANS_VBLANK_A = I915_READ(_TRANS_VBLANK_A);
304 dev_priv->saveTRANS_VSYNC_A = I915_READ(_TRANS_VSYNC_A);
305 }
306
307 dev_priv->saveDSPACNTR = I915_READ(_DSPACNTR);
308 dev_priv->saveDSPASTRIDE = I915_READ(_DSPASTRIDE);
309 dev_priv->saveDSPASIZE = I915_READ(_DSPASIZE);
310 dev_priv->saveDSPAPOS = I915_READ(_DSPAPOS);
311 dev_priv->saveDSPAADDR = I915_READ(_DSPAADDR);
312 if (INTEL_INFO(dev)->gen >= 4) {
313 dev_priv->saveDSPASURF = I915_READ(_DSPASURF);
314 dev_priv->saveDSPATILEOFF = I915_READ(_DSPATILEOFF);
315 }
316 i915_save_palette(dev, PIPE_A);
317 dev_priv->savePIPEASTAT = I915_READ(_PIPEASTAT);
318
319 /* Pipe & plane B info */
320 dev_priv->savePIPEBCONF = I915_READ(_PIPEBCONF);
321 dev_priv->savePIPEBSRC = I915_READ(_PIPEBSRC);
322 if (HAS_PCH_SPLIT(dev)) {
323 dev_priv->saveFPB0 = I915_READ(_PCH_FPB0);
324 dev_priv->saveFPB1 = I915_READ(_PCH_FPB1);
325 dev_priv->saveDPLL_B = I915_READ(_PCH_DPLL_B);
326 } else {
327 dev_priv->saveFPB0 = I915_READ(_FPB0);
328 dev_priv->saveFPB1 = I915_READ(_FPB1);
329 dev_priv->saveDPLL_B = I915_READ(_DPLL_B);
330 }
331 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
332 dev_priv->saveDPLL_B_MD = I915_READ(_DPLL_B_MD);
333 dev_priv->saveHTOTAL_B = I915_READ(_HTOTAL_B);
334 dev_priv->saveHBLANK_B = I915_READ(_HBLANK_B);
335 dev_priv->saveHSYNC_B = I915_READ(_HSYNC_B);
336 dev_priv->saveVTOTAL_B = I915_READ(_VTOTAL_B);
337 dev_priv->saveVBLANK_B = I915_READ(_VBLANK_B);
338 dev_priv->saveVSYNC_B = I915_READ(_VSYNC_B);
339 if (!HAS_PCH_SPLIT(dev))
340 dev_priv->saveBCLRPAT_B = I915_READ(_BCLRPAT_B);
341
342 if (HAS_PCH_SPLIT(dev)) {
343 dev_priv->savePIPEB_DATA_M1 = I915_READ(_PIPEB_DATA_M1);
344 dev_priv->savePIPEB_DATA_N1 = I915_READ(_PIPEB_DATA_N1);
345 dev_priv->savePIPEB_LINK_M1 = I915_READ(_PIPEB_LINK_M1);
346 dev_priv->savePIPEB_LINK_N1 = I915_READ(_PIPEB_LINK_N1);
347
348 dev_priv->saveFDI_TXB_CTL = I915_READ(_FDI_TXB_CTL);
349 dev_priv->saveFDI_RXB_CTL = I915_READ(_FDI_RXB_CTL);
350
351 dev_priv->savePFB_CTL_1 = I915_READ(_PFB_CTL_1);
352 dev_priv->savePFB_WIN_SZ = I915_READ(_PFB_WIN_SZ);
353 dev_priv->savePFB_WIN_POS = I915_READ(_PFB_WIN_POS);
354
355 dev_priv->saveTRANSBCONF = I915_READ(_TRANSBCONF);
356 dev_priv->saveTRANS_HTOTAL_B = I915_READ(_TRANS_HTOTAL_B);
357 dev_priv->saveTRANS_HBLANK_B = I915_READ(_TRANS_HBLANK_B);
358 dev_priv->saveTRANS_HSYNC_B = I915_READ(_TRANS_HSYNC_B);
359 dev_priv->saveTRANS_VTOTAL_B = I915_READ(_TRANS_VTOTAL_B);
360 dev_priv->saveTRANS_VBLANK_B = I915_READ(_TRANS_VBLANK_B);
361 dev_priv->saveTRANS_VSYNC_B = I915_READ(_TRANS_VSYNC_B);
362 }
363
364 dev_priv->saveDSPBCNTR = I915_READ(_DSPBCNTR);
365 dev_priv->saveDSPBSTRIDE = I915_READ(_DSPBSTRIDE);
366 dev_priv->saveDSPBSIZE = I915_READ(_DSPBSIZE);
367 dev_priv->saveDSPBPOS = I915_READ(_DSPBPOS);
368 dev_priv->saveDSPBADDR = I915_READ(_DSPBADDR);
369 if (INTEL_INFO(dev)->gen >= 4) {
370 dev_priv->saveDSPBSURF = I915_READ(_DSPBSURF);
371 dev_priv->saveDSPBTILEOFF = I915_READ(_DSPBTILEOFF);
372 }
373 i915_save_palette(dev, PIPE_B);
374 dev_priv->savePIPEBSTAT = I915_READ(_PIPEBSTAT);
375
376 /* Fences */
377 switch (INTEL_INFO(dev)->gen) {
378 case 7:
379 case 6:
380 for (i = 0; i < 16; i++)
381 dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
382 break;
383 case 5:
384 case 4:
385 for (i = 0; i < 16; i++)
386 dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
387 break;
388 case 3:
389 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
390 for (i = 0; i < 8; i++)
391 dev_priv->saveFENCE[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
392 case 2:
393 for (i = 0; i < 8; i++)
394 dev_priv->saveFENCE[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
395 break;
396 }
397
398 return;
399 }
400
401 static void i915_restore_modeset_reg(struct drm_device *dev)
402 {
403 struct drm_i915_private *dev_priv = dev->dev_private;
404 int dpll_a_reg, fpa0_reg, fpa1_reg;
405 int dpll_b_reg, fpb0_reg, fpb1_reg;
406 int i;
407
408 if (drm_core_check_feature(dev, DRIVER_MODESET))
409 return;
410
411 /* Fences */
412 switch (INTEL_INFO(dev)->gen) {
413 case 7:
414 case 6:
415 for (i = 0; i < 16; i++)
416 I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + (i * 8), dev_priv->saveFENCE[i]);
417 break;
418 case 5:
419 case 4:
420 for (i = 0; i < 16; i++)
421 I915_WRITE64(FENCE_REG_965_0 + (i * 8), dev_priv->saveFENCE[i]);
422 break;
423 case 3:
424 case 2:
425 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
426 for (i = 0; i < 8; i++)
427 I915_WRITE(FENCE_REG_945_8 + (i * 4), dev_priv->saveFENCE[i+8]);
428 for (i = 0; i < 8; i++)
429 I915_WRITE(FENCE_REG_830_0 + (i * 4), dev_priv->saveFENCE[i]);
430 break;
431 }
432
433
434 if (HAS_PCH_SPLIT(dev)) {
435 dpll_a_reg = _PCH_DPLL_A;
436 dpll_b_reg = _PCH_DPLL_B;
437 fpa0_reg = _PCH_FPA0;
438 fpb0_reg = _PCH_FPB0;
439 fpa1_reg = _PCH_FPA1;
440 fpb1_reg = _PCH_FPB1;
441 } else {
442 dpll_a_reg = _DPLL_A;
443 dpll_b_reg = _DPLL_B;
444 fpa0_reg = _FPA0;
445 fpb0_reg = _FPB0;
446 fpa1_reg = _FPA1;
447 fpb1_reg = _FPB1;
448 }
449
450 if (HAS_PCH_SPLIT(dev)) {
451 I915_WRITE(PCH_DREF_CONTROL, dev_priv->savePCH_DREF_CONTROL);
452 I915_WRITE(DISP_ARB_CTL, dev_priv->saveDISP_ARB_CTL);
453 }
454
455 /* Pipe & plane A info */
456 /* Prime the clock */
457 if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
458 I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A &
459 ~DPLL_VCO_ENABLE);
460 POSTING_READ(dpll_a_reg);
461 udelay(150);
462 }
463 I915_WRITE(fpa0_reg, dev_priv->saveFPA0);
464 I915_WRITE(fpa1_reg, dev_priv->saveFPA1);
465 /* Actually enable it */
466 I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A);
467 POSTING_READ(dpll_a_reg);
468 udelay(150);
469 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
470 I915_WRITE(_DPLL_A_MD, dev_priv->saveDPLL_A_MD);
471 POSTING_READ(_DPLL_A_MD);
472 }
473 udelay(150);
474
475 /* Restore mode */
476 I915_WRITE(_HTOTAL_A, dev_priv->saveHTOTAL_A);
477 I915_WRITE(_HBLANK_A, dev_priv->saveHBLANK_A);
478 I915_WRITE(_HSYNC_A, dev_priv->saveHSYNC_A);
479 I915_WRITE(_VTOTAL_A, dev_priv->saveVTOTAL_A);
480 I915_WRITE(_VBLANK_A, dev_priv->saveVBLANK_A);
481 I915_WRITE(_VSYNC_A, dev_priv->saveVSYNC_A);
482 if (!HAS_PCH_SPLIT(dev))
483 I915_WRITE(_BCLRPAT_A, dev_priv->saveBCLRPAT_A);
484
485 if (HAS_PCH_SPLIT(dev)) {
486 I915_WRITE(_PIPEA_DATA_M1, dev_priv->savePIPEA_DATA_M1);
487 I915_WRITE(_PIPEA_DATA_N1, dev_priv->savePIPEA_DATA_N1);
488 I915_WRITE(_PIPEA_LINK_M1, dev_priv->savePIPEA_LINK_M1);
489 I915_WRITE(_PIPEA_LINK_N1, dev_priv->savePIPEA_LINK_N1);
490
491 I915_WRITE(_FDI_RXA_CTL, dev_priv->saveFDI_RXA_CTL);
492 I915_WRITE(_FDI_TXA_CTL, dev_priv->saveFDI_TXA_CTL);
493
494 I915_WRITE(_PFA_CTL_1, dev_priv->savePFA_CTL_1);
495 I915_WRITE(_PFA_WIN_SZ, dev_priv->savePFA_WIN_SZ);
496 I915_WRITE(_PFA_WIN_POS, dev_priv->savePFA_WIN_POS);
497
498 I915_WRITE(_TRANSACONF, dev_priv->saveTRANSACONF);
499 I915_WRITE(_TRANS_HTOTAL_A, dev_priv->saveTRANS_HTOTAL_A);
500 I915_WRITE(_TRANS_HBLANK_A, dev_priv->saveTRANS_HBLANK_A);
501 I915_WRITE(_TRANS_HSYNC_A, dev_priv->saveTRANS_HSYNC_A);
502 I915_WRITE(_TRANS_VTOTAL_A, dev_priv->saveTRANS_VTOTAL_A);
503 I915_WRITE(_TRANS_VBLANK_A, dev_priv->saveTRANS_VBLANK_A);
504 I915_WRITE(_TRANS_VSYNC_A, dev_priv->saveTRANS_VSYNC_A);
505 }
506
507 /* Restore plane info */
508 I915_WRITE(_DSPASIZE, dev_priv->saveDSPASIZE);
509 I915_WRITE(_DSPAPOS, dev_priv->saveDSPAPOS);
510 I915_WRITE(_PIPEASRC, dev_priv->savePIPEASRC);
511 I915_WRITE(_DSPAADDR, dev_priv->saveDSPAADDR);
512 I915_WRITE(_DSPASTRIDE, dev_priv->saveDSPASTRIDE);
513 if (INTEL_INFO(dev)->gen >= 4) {
514 I915_WRITE(_DSPASURF, dev_priv->saveDSPASURF);
515 I915_WRITE(_DSPATILEOFF, dev_priv->saveDSPATILEOFF);
516 }
517
518 I915_WRITE(_PIPEACONF, dev_priv->savePIPEACONF);
519
520 i915_restore_palette(dev, PIPE_A);
521 /* Enable the plane */
522 I915_WRITE(_DSPACNTR, dev_priv->saveDSPACNTR);
523 I915_WRITE(_DSPAADDR, I915_READ(_DSPAADDR));
524
525 /* Pipe & plane B info */
526 if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
527 I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B &
528 ~DPLL_VCO_ENABLE);
529 POSTING_READ(dpll_b_reg);
530 udelay(150);
531 }
532 I915_WRITE(fpb0_reg, dev_priv->saveFPB0);
533 I915_WRITE(fpb1_reg, dev_priv->saveFPB1);
534 /* Actually enable it */
535 I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B);
536 POSTING_READ(dpll_b_reg);
537 udelay(150);
538 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
539 I915_WRITE(_DPLL_B_MD, dev_priv->saveDPLL_B_MD);
540 POSTING_READ(_DPLL_B_MD);
541 }
542 udelay(150);
543
544 /* Restore mode */
545 I915_WRITE(_HTOTAL_B, dev_priv->saveHTOTAL_B);
546 I915_WRITE(_HBLANK_B, dev_priv->saveHBLANK_B);
547 I915_WRITE(_HSYNC_B, dev_priv->saveHSYNC_B);
548 I915_WRITE(_VTOTAL_B, dev_priv->saveVTOTAL_B);
549 I915_WRITE(_VBLANK_B, dev_priv->saveVBLANK_B);
550 I915_WRITE(_VSYNC_B, dev_priv->saveVSYNC_B);
551 if (!HAS_PCH_SPLIT(dev))
552 I915_WRITE(_BCLRPAT_B, dev_priv->saveBCLRPAT_B);
553
554 if (HAS_PCH_SPLIT(dev)) {
555 I915_WRITE(_PIPEB_DATA_M1, dev_priv->savePIPEB_DATA_M1);
556 I915_WRITE(_PIPEB_DATA_N1, dev_priv->savePIPEB_DATA_N1);
557 I915_WRITE(_PIPEB_LINK_M1, dev_priv->savePIPEB_LINK_M1);
558 I915_WRITE(_PIPEB_LINK_N1, dev_priv->savePIPEB_LINK_N1);
559
560 I915_WRITE(_FDI_RXB_CTL, dev_priv->saveFDI_RXB_CTL);
561 I915_WRITE(_FDI_TXB_CTL, dev_priv->saveFDI_TXB_CTL);
562
563 I915_WRITE(_PFB_CTL_1, dev_priv->savePFB_CTL_1);
564 I915_WRITE(_PFB_WIN_SZ, dev_priv->savePFB_WIN_SZ);
565 I915_WRITE(_PFB_WIN_POS, dev_priv->savePFB_WIN_POS);
566
567 I915_WRITE(_TRANSBCONF, dev_priv->saveTRANSBCONF);
568 I915_WRITE(_TRANS_HTOTAL_B, dev_priv->saveTRANS_HTOTAL_B);
569 I915_WRITE(_TRANS_HBLANK_B, dev_priv->saveTRANS_HBLANK_B);
570 I915_WRITE(_TRANS_HSYNC_B, dev_priv->saveTRANS_HSYNC_B);
571 I915_WRITE(_TRANS_VTOTAL_B, dev_priv->saveTRANS_VTOTAL_B);
572 I915_WRITE(_TRANS_VBLANK_B, dev_priv->saveTRANS_VBLANK_B);
573 I915_WRITE(_TRANS_VSYNC_B, dev_priv->saveTRANS_VSYNC_B);
574 }
575
576 /* Restore plane info */
577 I915_WRITE(_DSPBSIZE, dev_priv->saveDSPBSIZE);
578 I915_WRITE(_DSPBPOS, dev_priv->saveDSPBPOS);
579 I915_WRITE(_PIPEBSRC, dev_priv->savePIPEBSRC);
580 I915_WRITE(_DSPBADDR, dev_priv->saveDSPBADDR);
581 I915_WRITE(_DSPBSTRIDE, dev_priv->saveDSPBSTRIDE);
582 if (INTEL_INFO(dev)->gen >= 4) {
583 I915_WRITE(_DSPBSURF, dev_priv->saveDSPBSURF);
584 I915_WRITE(_DSPBTILEOFF, dev_priv->saveDSPBTILEOFF);
585 }
586
587 I915_WRITE(_PIPEBCONF, dev_priv->savePIPEBCONF);
588
589 i915_restore_palette(dev, PIPE_B);
590 /* Enable the plane */
591 I915_WRITE(_DSPBCNTR, dev_priv->saveDSPBCNTR);
592 I915_WRITE(_DSPBADDR, I915_READ(_DSPBADDR));
593
594 /* Cursor state */
595 I915_WRITE(_CURAPOS, dev_priv->saveCURAPOS);
596 I915_WRITE(_CURACNTR, dev_priv->saveCURACNTR);
597 I915_WRITE(_CURABASE, dev_priv->saveCURABASE);
598 I915_WRITE(_CURBPOS, dev_priv->saveCURBPOS);
599 I915_WRITE(_CURBCNTR, dev_priv->saveCURBCNTR);
600 I915_WRITE(_CURBBASE, dev_priv->saveCURBBASE);
601 if (IS_GEN2(dev))
602 I915_WRITE(CURSIZE, dev_priv->saveCURSIZE);
603
604 return;
605 }
606
607 static void i915_save_display(struct drm_device *dev)
608 {
609 struct drm_i915_private *dev_priv = dev->dev_private;
610
611 /* Display arbitration control */
612 dev_priv->saveDSPARB = I915_READ(DSPARB);
613
614 /* This is only meaningful in non-KMS mode */
615 /* Don't save them in KMS mode */
616 i915_save_modeset_reg(dev);
617
618 /* CRT state */
619 if (HAS_PCH_SPLIT(dev)) {
620 dev_priv->saveADPA = I915_READ(PCH_ADPA);
621 } else {
622 dev_priv->saveADPA = I915_READ(ADPA);
623 }
624
625 /* LVDS state */
626 if (HAS_PCH_SPLIT(dev)) {
627 dev_priv->savePP_CONTROL = I915_READ(PCH_PP_CONTROL);
628 dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_PCH_CTL1);
629 dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_PCH_CTL2);
630 dev_priv->saveBLC_CPU_PWM_CTL = I915_READ(BLC_PWM_CPU_CTL);
631 dev_priv->saveBLC_CPU_PWM_CTL2 = I915_READ(BLC_PWM_CPU_CTL2);
632 dev_priv->saveLVDS = I915_READ(PCH_LVDS);
633 } else {
634 dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
635 dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
636 dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
637 dev_priv->saveBLC_HIST_CTL = I915_READ(BLC_HIST_CTL);
638 if (INTEL_INFO(dev)->gen >= 4)
639 dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
640 if (IS_MOBILE(dev) && !IS_I830(dev))
641 dev_priv->saveLVDS = I915_READ(LVDS);
642 }
643
644 if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
645 dev_priv->savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
646
647 if (HAS_PCH_SPLIT(dev)) {
648 dev_priv->savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS);
649 dev_priv->savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS);
650 dev_priv->savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR);
651 } else {
652 dev_priv->savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
653 dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
654 dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
655 }
656
657 /* Display Port state */
658 if (SUPPORTS_INTEGRATED_DP(dev)) {
659 dev_priv->saveDP_B = I915_READ(DP_B);
660 dev_priv->saveDP_C = I915_READ(DP_C);
661 dev_priv->saveDP_D = I915_READ(DP_D);
662 dev_priv->savePIPEA_GMCH_DATA_M = I915_READ(_PIPEA_GMCH_DATA_M);
663 dev_priv->savePIPEB_GMCH_DATA_M = I915_READ(_PIPEB_GMCH_DATA_M);
664 dev_priv->savePIPEA_GMCH_DATA_N = I915_READ(_PIPEA_GMCH_DATA_N);
665 dev_priv->savePIPEB_GMCH_DATA_N = I915_READ(_PIPEB_GMCH_DATA_N);
666 dev_priv->savePIPEA_DP_LINK_M = I915_READ(_PIPEA_DP_LINK_M);
667 dev_priv->savePIPEB_DP_LINK_M = I915_READ(_PIPEB_DP_LINK_M);
668 dev_priv->savePIPEA_DP_LINK_N = I915_READ(_PIPEA_DP_LINK_N);
669 dev_priv->savePIPEB_DP_LINK_N = I915_READ(_PIPEB_DP_LINK_N);
670 }
671 /* FIXME: save TV & SDVO state */
672
673 /* Only save FBC state on the platform that supports FBC */
674 if (I915_HAS_FBC(dev)) {
675 if (HAS_PCH_SPLIT(dev)) {
676 dev_priv->saveDPFC_CB_BASE = I915_READ(ILK_DPFC_CB_BASE);
677 } else if (IS_GM45(dev)) {
678 dev_priv->saveDPFC_CB_BASE = I915_READ(DPFC_CB_BASE);
679 } else {
680 dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
681 dev_priv->saveFBC_LL_BASE = I915_READ(FBC_LL_BASE);
682 dev_priv->saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2);
683 dev_priv->saveFBC_CONTROL = I915_READ(FBC_CONTROL);
684 }
685 }
686
687 /* VGA state */
688 dev_priv->saveVGA0 = I915_READ(VGA0);
689 dev_priv->saveVGA1 = I915_READ(VGA1);
690 dev_priv->saveVGA_PD = I915_READ(VGA_PD);
691 if (HAS_PCH_SPLIT(dev))
692 dev_priv->saveVGACNTRL = I915_READ(CPU_VGACNTRL);
693 else
694 dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);
695
696 i915_save_vga(dev);
697 }
698
699 static void i915_restore_display(struct drm_device *dev)
700 {
701 struct drm_i915_private *dev_priv = dev->dev_private;
702
703 /* Display arbitration */
704 I915_WRITE(DSPARB, dev_priv->saveDSPARB);
705
706 /* Display port ratios (must be done before clock is set) */
707 if (SUPPORTS_INTEGRATED_DP(dev)) {
708 I915_WRITE(_PIPEA_GMCH_DATA_M, dev_priv->savePIPEA_GMCH_DATA_M);
709 I915_WRITE(_PIPEB_GMCH_DATA_M, dev_priv->savePIPEB_GMCH_DATA_M);
710 I915_WRITE(_PIPEA_GMCH_DATA_N, dev_priv->savePIPEA_GMCH_DATA_N);
711 I915_WRITE(_PIPEB_GMCH_DATA_N, dev_priv->savePIPEB_GMCH_DATA_N);
712 I915_WRITE(_PIPEA_DP_LINK_M, dev_priv->savePIPEA_DP_LINK_M);
713 I915_WRITE(_PIPEB_DP_LINK_M, dev_priv->savePIPEB_DP_LINK_M);
714 I915_WRITE(_PIPEA_DP_LINK_N, dev_priv->savePIPEA_DP_LINK_N);
715 I915_WRITE(_PIPEB_DP_LINK_N, dev_priv->savePIPEB_DP_LINK_N);
716 }
717
718 /* This is only meaningful in non-KMS mode */
719 /* Don't restore them in KMS mode */
720 i915_restore_modeset_reg(dev);
721
722 /* CRT state */
723 if (HAS_PCH_SPLIT(dev))
724 I915_WRITE(PCH_ADPA, dev_priv->saveADPA);
725 else
726 I915_WRITE(ADPA, dev_priv->saveADPA);
727
728 /* LVDS state */
729 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
730 I915_WRITE(BLC_PWM_CTL2, dev_priv->saveBLC_PWM_CTL2);
731
732 if (HAS_PCH_SPLIT(dev)) {
733 I915_WRITE(PCH_LVDS, dev_priv->saveLVDS);
734 } else if (IS_MOBILE(dev) && !IS_I830(dev))
735 I915_WRITE(LVDS, dev_priv->saveLVDS);
736
737 if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
738 I915_WRITE(PFIT_CONTROL, dev_priv->savePFIT_CONTROL);
739
740 if (HAS_PCH_SPLIT(dev)) {
741 I915_WRITE(BLC_PWM_PCH_CTL1, dev_priv->saveBLC_PWM_CTL);
742 I915_WRITE(BLC_PWM_PCH_CTL2, dev_priv->saveBLC_PWM_CTL2);
743 I915_WRITE(BLC_PWM_CPU_CTL, dev_priv->saveBLC_CPU_PWM_CTL);
744 I915_WRITE(BLC_PWM_CPU_CTL2, dev_priv->saveBLC_CPU_PWM_CTL2);
745 I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
746 I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
747 I915_WRITE(PCH_PP_DIVISOR, dev_priv->savePP_DIVISOR);
748 I915_WRITE(PCH_PP_CONTROL, dev_priv->savePP_CONTROL);
749 I915_WRITE(RSTDBYCTL,
750 dev_priv->saveMCHBAR_RENDER_STANDBY);
751 } else {
752 I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
753 I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
754 I915_WRITE(BLC_HIST_CTL, dev_priv->saveBLC_HIST_CTL);
755 I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
756 I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
757 I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
758 I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
759 }
760
761 /* Display Port state */
762 if (SUPPORTS_INTEGRATED_DP(dev)) {
763 I915_WRITE(DP_B, dev_priv->saveDP_B);
764 I915_WRITE(DP_C, dev_priv->saveDP_C);
765 I915_WRITE(DP_D, dev_priv->saveDP_D);
766 }
767 /* FIXME: restore TV & SDVO state */
768
769 /* only restore FBC info on the platform that supports FBC*/
770 intel_disable_fbc(dev);
771 if (I915_HAS_FBC(dev)) {
772 if (HAS_PCH_SPLIT(dev)) {
773 I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
774 } else if (IS_GM45(dev)) {
775 I915_WRITE(DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
776 } else {
777 I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
778 I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
779 I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);
780 I915_WRITE(FBC_CONTROL, dev_priv->saveFBC_CONTROL);
781 }
782 }
783 /* VGA state */
784 if (HAS_PCH_SPLIT(dev))
785 I915_WRITE(CPU_VGACNTRL, dev_priv->saveVGACNTRL);
786 else
787 I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
788
789 I915_WRITE(VGA0, dev_priv->saveVGA0);
790 I915_WRITE(VGA1, dev_priv->saveVGA1);
791 I915_WRITE(VGA_PD, dev_priv->saveVGA_PD);
792 POSTING_READ(VGA_PD);
793 udelay(150);
794
795 i915_restore_vga(dev);
796 }
797
798 int i915_save_state(struct drm_device *dev)
799 {
800 struct drm_i915_private *dev_priv = dev->dev_private;
801 int i;
802
803 pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
804
805 mutex_lock(&dev->struct_mutex);
806
807 /* Hardware status page */
808 dev_priv->saveHWS = I915_READ(HWS_PGA);
809
810 i915_save_display(dev);
811
812 /* Interrupt state */
813 if (HAS_PCH_SPLIT(dev)) {
814 dev_priv->saveDEIER = I915_READ(DEIER);
815 dev_priv->saveDEIMR = I915_READ(DEIMR);
816 dev_priv->saveGTIER = I915_READ(GTIER);
817 dev_priv->saveGTIMR = I915_READ(GTIMR);
818 dev_priv->saveFDI_RXA_IMR = I915_READ(_FDI_RXA_IMR);
819 dev_priv->saveFDI_RXB_IMR = I915_READ(_FDI_RXB_IMR);
820 dev_priv->saveMCHBAR_RENDER_STANDBY =
821 I915_READ(RSTDBYCTL);
822 dev_priv->savePCH_PORT_HOTPLUG = I915_READ(PCH_PORT_HOTPLUG);
823 } else {
824 dev_priv->saveIER = I915_READ(IER);
825 dev_priv->saveIMR = I915_READ(IMR);
826 }
827
828 if (IS_IRONLAKE_M(dev))
829 ironlake_disable_drps(dev);
830 if (INTEL_INFO(dev)->gen >= 6)
831 gen6_disable_rps(dev);
832
833 /* Cache mode state */
834 dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
835
836 /* Memory Arbitration state */
837 dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
838
839 /* Scratch space */
840 for (i = 0; i < 16; i++) {
841 dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
842 dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
843 }
844 for (i = 0; i < 3; i++)
845 dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));
846
847 mutex_unlock(&dev->struct_mutex);
848
849 return 0;
850 }
851
852 int i915_restore_state(struct drm_device *dev)
853 {
854 struct drm_i915_private *dev_priv = dev->dev_private;
855 int i;
856
857 pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);
858
859 mutex_lock(&dev->struct_mutex);
860
861 /* Hardware status page */
862 I915_WRITE(HWS_PGA, dev_priv->saveHWS);
863
864 i915_restore_display(dev);
865
866 /* Interrupt state */
867 if (HAS_PCH_SPLIT(dev)) {
868 I915_WRITE(DEIER, dev_priv->saveDEIER);
869 I915_WRITE(DEIMR, dev_priv->saveDEIMR);
870 I915_WRITE(GTIER, dev_priv->saveGTIER);
871 I915_WRITE(GTIMR, dev_priv->saveGTIMR);
872 I915_WRITE(_FDI_RXA_IMR, dev_priv->saveFDI_RXA_IMR);
873 I915_WRITE(_FDI_RXB_IMR, dev_priv->saveFDI_RXB_IMR);
874 I915_WRITE(PCH_PORT_HOTPLUG, dev_priv->savePCH_PORT_HOTPLUG);
875 } else {
876 I915_WRITE(IER, dev_priv->saveIER);
877 I915_WRITE(IMR, dev_priv->saveIMR);
878 }
879 mutex_unlock(&dev->struct_mutex);
880
881 if (drm_core_check_feature(dev, DRIVER_MODESET))
882 intel_init_clock_gating(dev);
883
884 if (IS_IRONLAKE_M(dev)) {
885 ironlake_enable_drps(dev);
886 intel_init_emon(dev);
887 }
888
889 if (INTEL_INFO(dev)->gen >= 6) {
890 gen6_enable_rps(dev_priv);
891 gen6_update_ring_freq(dev_priv);
892 }
893
894 mutex_lock(&dev->struct_mutex);
895
896 /* Cache mode state */
897 I915_WRITE(CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);
898
899 /* Memory arbitration state */
900 I915_WRITE(MI_ARB_STATE, dev_priv->saveMI_ARB_STATE | 0xffff0000);
901
902 for (i = 0; i < 16; i++) {
903 I915_WRITE(SWF00 + (i << 2), dev_priv->saveSWF0[i]);
904 I915_WRITE(SWF10 + (i << 2), dev_priv->saveSWF1[i]);
905 }
906 for (i = 0; i < 3; i++)
907 I915_WRITE(SWF30 + (i << 2), dev_priv->saveSWF2[i]);
908
909 mutex_unlock(&dev->struct_mutex);
910
911 intel_i2c_reset(dev);
912
913 return 0;
914 }