ACPI: Set hotplug _OST support bit to _OSC
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / gpu / drm / gma500 / cdv_device.c
1 /**************************************************************************
2 * Copyright (c) 2011, Intel Corporation.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 **************************************************************************/
19
20 #include <linux/backlight.h>
21 #include <drm/drmP.h>
22 #include <drm/drm.h>
23 #include "gma_drm.h"
24 #include "psb_drv.h"
25 #include "psb_reg.h"
26 #include "psb_intel_reg.h"
27 #include "intel_bios.h"
28 #include "cdv_device.h"
29
30 #define VGA_SR_INDEX 0x3c4
31 #define VGA_SR_DATA 0x3c5
32
33 static void cdv_disable_vga(struct drm_device *dev)
34 {
35 u8 sr1;
36 u32 vga_reg;
37
38 vga_reg = VGACNTRL;
39
40 outb(1, VGA_SR_INDEX);
41 sr1 = inb(VGA_SR_DATA);
42 outb(sr1 | 1<<5, VGA_SR_DATA);
43 udelay(300);
44
45 REG_WRITE(vga_reg, VGA_DISP_DISABLE);
46 REG_READ(vga_reg);
47 }
48
49 static int cdv_output_init(struct drm_device *dev)
50 {
51 struct drm_psb_private *dev_priv = dev->dev_private;
52
53 drm_mode_create_scaling_mode_property(dev);
54
55 cdv_disable_vga(dev);
56
57 cdv_intel_crt_init(dev, &dev_priv->mode_dev);
58 cdv_intel_lvds_init(dev, &dev_priv->mode_dev);
59
60 /* These bits indicate HDMI not SDVO on CDV */
61 if (REG_READ(SDVOB) & SDVO_DETECTED)
62 cdv_hdmi_init(dev, &dev_priv->mode_dev, SDVOB);
63 if (REG_READ(SDVOC) & SDVO_DETECTED)
64 cdv_hdmi_init(dev, &dev_priv->mode_dev, SDVOC);
65 return 0;
66 }
67
68 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
69
70 /*
71 * Cedartrail Backlght Interfaces
72 */
73
74 static struct backlight_device *cdv_backlight_device;
75
76 static int cdv_backlight_combination_mode(struct drm_device *dev)
77 {
78 return REG_READ(BLC_PWM_CTL2) & PWM_LEGACY_MODE;
79 }
80
81 static int cdv_get_brightness(struct backlight_device *bd)
82 {
83 struct drm_device *dev = bl_get_data(bd);
84 u32 val = REG_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
85
86 if (cdv_backlight_combination_mode(dev)) {
87 u8 lbpc;
88
89 val &= ~1;
90 pci_read_config_byte(dev->pdev, 0xF4, &lbpc);
91 val *= lbpc;
92 }
93 return val;
94 }
95
96 static u32 cdv_get_max_backlight(struct drm_device *dev)
97 {
98 u32 max = REG_READ(BLC_PWM_CTL);
99
100 if (max == 0) {
101 DRM_DEBUG_KMS("LVDS Panel PWM value is 0!\n");
102 /* i915 does this, I believe which means that we should not
103 * smash PWM control as firmware will take control of it. */
104 return 1;
105 }
106
107 max >>= 16;
108 if (cdv_backlight_combination_mode(dev))
109 max *= 0xff;
110 return max;
111 }
112
113 static int cdv_set_brightness(struct backlight_device *bd)
114 {
115 struct drm_device *dev = bl_get_data(bd);
116 int level = bd->props.brightness;
117 u32 blc_pwm_ctl;
118
119 /* Percentage 1-100% being valid */
120 if (level < 1)
121 level = 1;
122
123 if (cdv_backlight_combination_mode(dev)) {
124 u32 max = cdv_get_max_backlight(dev);
125 u8 lbpc;
126
127 lbpc = level * 0xfe / max + 1;
128 level /= lbpc;
129
130 pci_write_config_byte(dev->pdev, 0xF4, lbpc);
131 }
132
133 blc_pwm_ctl = REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
134 REG_WRITE(BLC_PWM_CTL, (blc_pwm_ctl |
135 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
136 return 0;
137 }
138
139 static const struct backlight_ops cdv_ops = {
140 .get_brightness = cdv_get_brightness,
141 .update_status = cdv_set_brightness,
142 };
143
144 static int cdv_backlight_init(struct drm_device *dev)
145 {
146 struct drm_psb_private *dev_priv = dev->dev_private;
147 struct backlight_properties props;
148
149 memset(&props, 0, sizeof(struct backlight_properties));
150 props.max_brightness = 100;
151 props.type = BACKLIGHT_PLATFORM;
152
153 cdv_backlight_device = backlight_device_register("psb-bl",
154 NULL, (void *)dev, &cdv_ops, &props);
155 if (IS_ERR(cdv_backlight_device))
156 return PTR_ERR(cdv_backlight_device);
157
158 cdv_backlight_device->props.brightness =
159 cdv_get_brightness(cdv_backlight_device);
160 cdv_backlight_device->props.max_brightness = cdv_get_max_backlight(dev);
161 backlight_update_status(cdv_backlight_device);
162 dev_priv->backlight_device = cdv_backlight_device;
163 return 0;
164 }
165
166 #endif
167
168 /*
169 * Provide the Cedarview specific chip logic and low level methods
170 * for power management
171 *
172 * FIXME: we need to implement the apm/ospm base management bits
173 * for this and the MID devices.
174 */
175
176 static inline u32 CDV_MSG_READ32(uint port, uint offset)
177 {
178 int mcr = (0x10<<24) | (port << 16) | (offset << 8);
179 uint32_t ret_val = 0;
180 struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
181 pci_write_config_dword(pci_root, 0xD0, mcr);
182 pci_read_config_dword(pci_root, 0xD4, &ret_val);
183 pci_dev_put(pci_root);
184 return ret_val;
185 }
186
187 static inline void CDV_MSG_WRITE32(uint port, uint offset, u32 value)
188 {
189 int mcr = (0x11<<24) | (port << 16) | (offset << 8) | 0xF0;
190 struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
191 pci_write_config_dword(pci_root, 0xD4, value);
192 pci_write_config_dword(pci_root, 0xD0, mcr);
193 pci_dev_put(pci_root);
194 }
195
196 #define PSB_PM_SSC 0x20
197 #define PSB_PM_SSS 0x30
198 #define PSB_PWRGT_GFX_ON 0x02
199 #define PSB_PWRGT_GFX_OFF 0x01
200 #define PSB_PWRGT_GFX_D0 0x00
201 #define PSB_PWRGT_GFX_D3 0x03
202
203 static void cdv_init_pm(struct drm_device *dev)
204 {
205 struct drm_psb_private *dev_priv = dev->dev_private;
206 u32 pwr_cnt;
207 int i;
208
209 dev_priv->apm_base = CDV_MSG_READ32(PSB_PUNIT_PORT,
210 PSB_APMBA) & 0xFFFF;
211 dev_priv->ospm_base = CDV_MSG_READ32(PSB_PUNIT_PORT,
212 PSB_OSPMBA) & 0xFFFF;
213
214 /* Power status */
215 pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
216
217 /* Enable the GPU */
218 pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
219 pwr_cnt |= PSB_PWRGT_GFX_ON;
220 outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
221
222 /* Wait for the GPU power */
223 for (i = 0; i < 5; i++) {
224 u32 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
225 if ((pwr_sts & PSB_PWRGT_GFX_MASK) == 0)
226 return;
227 udelay(10);
228 }
229 dev_err(dev->dev, "GPU: power management timed out.\n");
230 }
231
232 static void cdv_errata(struct drm_device *dev)
233 {
234 /* Disable bonus launch.
235 * CPU and GPU competes for memory and display misses updates and
236 * flickers. Worst with dual core, dual displays.
237 *
238 * Fixes were done to Win 7 gfx driver to disable a feature called
239 * Bonus Launch to work around the issue, by degrading
240 * performance.
241 */
242 CDV_MSG_WRITE32(3, 0x30, 0x08027108);
243 }
244
245 /**
246 * cdv_save_display_registers - save registers lost on suspend
247 * @dev: our DRM device
248 *
249 * Save the state we need in order to be able to restore the interface
250 * upon resume from suspend
251 */
252 static int cdv_save_display_registers(struct drm_device *dev)
253 {
254 struct drm_psb_private *dev_priv = dev->dev_private;
255 struct psb_save_area *regs = &dev_priv->regs;
256 struct drm_connector *connector;
257
258 dev_dbg(dev->dev, "Saving GPU registers.\n");
259
260 pci_read_config_byte(dev->pdev, 0xF4, &regs->cdv.saveLBB);
261
262 regs->cdv.saveDSPCLK_GATE_D = REG_READ(DSPCLK_GATE_D);
263 regs->cdv.saveRAMCLK_GATE_D = REG_READ(RAMCLK_GATE_D);
264
265 regs->cdv.saveDSPARB = REG_READ(DSPARB);
266 regs->cdv.saveDSPFW[0] = REG_READ(DSPFW1);
267 regs->cdv.saveDSPFW[1] = REG_READ(DSPFW2);
268 regs->cdv.saveDSPFW[2] = REG_READ(DSPFW3);
269 regs->cdv.saveDSPFW[3] = REG_READ(DSPFW4);
270 regs->cdv.saveDSPFW[4] = REG_READ(DSPFW5);
271 regs->cdv.saveDSPFW[5] = REG_READ(DSPFW6);
272
273 regs->cdv.saveADPA = REG_READ(ADPA);
274
275 regs->cdv.savePP_CONTROL = REG_READ(PP_CONTROL);
276 regs->cdv.savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
277 regs->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
278 regs->saveBLC_PWM_CTL2 = REG_READ(BLC_PWM_CTL2);
279 regs->cdv.saveLVDS = REG_READ(LVDS);
280
281 regs->cdv.savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
282
283 regs->cdv.savePP_ON_DELAYS = REG_READ(PP_ON_DELAYS);
284 regs->cdv.savePP_OFF_DELAYS = REG_READ(PP_OFF_DELAYS);
285 regs->cdv.savePP_CYCLE = REG_READ(PP_CYCLE);
286
287 regs->cdv.saveVGACNTRL = REG_READ(VGACNTRL);
288
289 regs->cdv.saveIER = REG_READ(PSB_INT_ENABLE_R);
290 regs->cdv.saveIMR = REG_READ(PSB_INT_MASK_R);
291
292 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
293 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
294
295 return 0;
296 }
297
298 /**
299 * cdv_restore_display_registers - restore lost register state
300 * @dev: our DRM device
301 *
302 * Restore register state that was lost during suspend and resume.
303 *
304 * FIXME: review
305 */
306 static int cdv_restore_display_registers(struct drm_device *dev)
307 {
308 struct drm_psb_private *dev_priv = dev->dev_private;
309 struct psb_save_area *regs = &dev_priv->regs;
310 struct drm_connector *connector;
311 u32 temp;
312
313 pci_write_config_byte(dev->pdev, 0xF4, regs->cdv.saveLBB);
314
315 REG_WRITE(DSPCLK_GATE_D, regs->cdv.saveDSPCLK_GATE_D);
316 REG_WRITE(RAMCLK_GATE_D, regs->cdv.saveRAMCLK_GATE_D);
317
318 /* BIOS does below anyway */
319 REG_WRITE(DPIO_CFG, 0);
320 REG_WRITE(DPIO_CFG, DPIO_MODE_SELECT_0 | DPIO_CMN_RESET_N);
321
322 temp = REG_READ(DPLL_A);
323 if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
324 REG_WRITE(DPLL_A, temp | DPLL_SYNCLOCK_ENABLE);
325 REG_READ(DPLL_A);
326 }
327
328 temp = REG_READ(DPLL_B);
329 if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
330 REG_WRITE(DPLL_B, temp | DPLL_SYNCLOCK_ENABLE);
331 REG_READ(DPLL_B);
332 }
333
334 udelay(500);
335
336 REG_WRITE(DSPFW1, regs->cdv.saveDSPFW[0]);
337 REG_WRITE(DSPFW2, regs->cdv.saveDSPFW[1]);
338 REG_WRITE(DSPFW3, regs->cdv.saveDSPFW[2]);
339 REG_WRITE(DSPFW4, regs->cdv.saveDSPFW[3]);
340 REG_WRITE(DSPFW5, regs->cdv.saveDSPFW[4]);
341 REG_WRITE(DSPFW6, regs->cdv.saveDSPFW[5]);
342
343 REG_WRITE(DSPARB, regs->cdv.saveDSPARB);
344 REG_WRITE(ADPA, regs->cdv.saveADPA);
345
346 REG_WRITE(BLC_PWM_CTL2, regs->saveBLC_PWM_CTL2);
347 REG_WRITE(LVDS, regs->cdv.saveLVDS);
348 REG_WRITE(PFIT_CONTROL, regs->cdv.savePFIT_CONTROL);
349 REG_WRITE(PFIT_PGM_RATIOS, regs->cdv.savePFIT_PGM_RATIOS);
350 REG_WRITE(BLC_PWM_CTL, regs->saveBLC_PWM_CTL);
351 REG_WRITE(PP_ON_DELAYS, regs->cdv.savePP_ON_DELAYS);
352 REG_WRITE(PP_OFF_DELAYS, regs->cdv.savePP_OFF_DELAYS);
353 REG_WRITE(PP_CYCLE, regs->cdv.savePP_CYCLE);
354 REG_WRITE(PP_CONTROL, regs->cdv.savePP_CONTROL);
355
356 REG_WRITE(VGACNTRL, regs->cdv.saveVGACNTRL);
357
358 REG_WRITE(PSB_INT_ENABLE_R, regs->cdv.saveIER);
359 REG_WRITE(PSB_INT_MASK_R, regs->cdv.saveIMR);
360
361 /* Fix arbitration bug */
362 cdv_errata(dev);
363
364 drm_mode_config_reset(dev);
365
366 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
367 connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
368
369 /* Resume the modeset for every activated CRTC */
370 drm_helper_resume_force_mode(dev);
371 return 0;
372 }
373
374 static int cdv_power_down(struct drm_device *dev)
375 {
376 struct drm_psb_private *dev_priv = dev->dev_private;
377 u32 pwr_cnt, pwr_mask, pwr_sts;
378 int tries = 5;
379
380 pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
381 pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
382 pwr_cnt |= PSB_PWRGT_GFX_OFF;
383 pwr_mask = PSB_PWRGT_GFX_MASK;
384
385 outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
386
387 while (tries--) {
388 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
389 if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D3)
390 return 0;
391 udelay(10);
392 }
393 return 0;
394 }
395
396 static int cdv_power_up(struct drm_device *dev)
397 {
398 struct drm_psb_private *dev_priv = dev->dev_private;
399 u32 pwr_cnt, pwr_mask, pwr_sts;
400 int tries = 5;
401
402 pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
403 pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
404 pwr_cnt |= PSB_PWRGT_GFX_ON;
405 pwr_mask = PSB_PWRGT_GFX_MASK;
406
407 outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
408
409 while (tries--) {
410 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
411 if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D0)
412 return 0;
413 udelay(10);
414 }
415 return 0;
416 }
417
418 /* FIXME ? - shared with Poulsbo */
419 static void cdv_get_core_freq(struct drm_device *dev)
420 {
421 uint32_t clock;
422 struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
423 struct drm_psb_private *dev_priv = dev->dev_private;
424
425 pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
426 pci_read_config_dword(pci_root, 0xD4, &clock);
427 pci_dev_put(pci_root);
428
429 switch (clock & 0x07) {
430 case 0:
431 dev_priv->core_freq = 100;
432 break;
433 case 1:
434 dev_priv->core_freq = 133;
435 break;
436 case 2:
437 dev_priv->core_freq = 150;
438 break;
439 case 3:
440 dev_priv->core_freq = 178;
441 break;
442 case 4:
443 dev_priv->core_freq = 200;
444 break;
445 case 5:
446 case 6:
447 case 7:
448 dev_priv->core_freq = 266;
449 default:
450 dev_priv->core_freq = 0;
451 }
452 }
453
454 static void cdv_hotplug_work_func(struct work_struct *work)
455 {
456 struct drm_psb_private *dev_priv = container_of(work, struct drm_psb_private,
457 hotplug_work);
458 struct drm_device *dev = dev_priv->dev;
459
460 /* Just fire off a uevent and let userspace tell us what to do */
461 drm_helper_hpd_irq_event(dev);
462 }
463
464 /* The core driver has received a hotplug IRQ. We are in IRQ context
465 so extract the needed information and kick off queued processing */
466
467 static int cdv_hotplug_event(struct drm_device *dev)
468 {
469 struct drm_psb_private *dev_priv = dev->dev_private;
470 schedule_work(&dev_priv->hotplug_work);
471 REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
472 return 1;
473 }
474
475 static void cdv_hotplug_enable(struct drm_device *dev, bool on)
476 {
477 if (on) {
478 u32 hotplug = REG_READ(PORT_HOTPLUG_EN);
479 hotplug |= HDMIB_HOTPLUG_INT_EN | HDMIC_HOTPLUG_INT_EN |
480 HDMID_HOTPLUG_INT_EN | CRT_HOTPLUG_INT_EN;
481 REG_WRITE(PORT_HOTPLUG_EN, hotplug);
482 } else {
483 REG_WRITE(PORT_HOTPLUG_EN, 0);
484 REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
485 }
486 }
487
488 /* Cedarview */
489 static const struct psb_offset cdv_regmap[2] = {
490 {
491 .fp0 = FPA0,
492 .fp1 = FPA1,
493 .cntr = DSPACNTR,
494 .conf = PIPEACONF,
495 .src = PIPEASRC,
496 .dpll = DPLL_A,
497 .dpll_md = DPLL_A_MD,
498 .htotal = HTOTAL_A,
499 .hblank = HBLANK_A,
500 .hsync = HSYNC_A,
501 .vtotal = VTOTAL_A,
502 .vblank = VBLANK_A,
503 .vsync = VSYNC_A,
504 .stride = DSPASTRIDE,
505 .size = DSPASIZE,
506 .pos = DSPAPOS,
507 .base = DSPABASE,
508 .surf = DSPASURF,
509 .addr = DSPABASE,
510 .status = PIPEASTAT,
511 .linoff = DSPALINOFF,
512 .tileoff = DSPATILEOFF,
513 .palette = PALETTE_A,
514 },
515 {
516 .fp0 = FPB0,
517 .fp1 = FPB1,
518 .cntr = DSPBCNTR,
519 .conf = PIPEBCONF,
520 .src = PIPEBSRC,
521 .dpll = DPLL_B,
522 .dpll_md = DPLL_B_MD,
523 .htotal = HTOTAL_B,
524 .hblank = HBLANK_B,
525 .hsync = HSYNC_B,
526 .vtotal = VTOTAL_B,
527 .vblank = VBLANK_B,
528 .vsync = VSYNC_B,
529 .stride = DSPBSTRIDE,
530 .size = DSPBSIZE,
531 .pos = DSPBPOS,
532 .base = DSPBBASE,
533 .surf = DSPBSURF,
534 .addr = DSPBBASE,
535 .status = PIPEBSTAT,
536 .linoff = DSPBLINOFF,
537 .tileoff = DSPBTILEOFF,
538 .palette = PALETTE_B,
539 }
540 };
541
542 static int cdv_chip_setup(struct drm_device *dev)
543 {
544 struct drm_psb_private *dev_priv = dev->dev_private;
545 INIT_WORK(&dev_priv->hotplug_work, cdv_hotplug_work_func);
546
547 if (pci_enable_msi(dev->pdev))
548 dev_warn(dev->dev, "Enabling MSI failed!\n");
549 dev_priv->regmap = cdv_regmap;
550 cdv_get_core_freq(dev);
551 psb_intel_opregion_init(dev);
552 psb_intel_init_bios(dev);
553 cdv_hotplug_enable(dev, false);
554 return 0;
555 }
556
557 /* CDV is much like Poulsbo but has MID like SGX offsets and PM */
558
559 const struct psb_ops cdv_chip_ops = {
560 .name = "GMA3600/3650",
561 .accel_2d = 0,
562 .pipes = 2,
563 .crtcs = 2,
564 .hdmi_mask = (1 << 0) | (1 << 1),
565 .lvds_mask = (1 << 1),
566 .cursor_needs_phys = 0,
567 .sgx_offset = MRST_SGX_OFFSET,
568 .chip_setup = cdv_chip_setup,
569 .errata = cdv_errata,
570
571 .crtc_helper = &cdv_intel_helper_funcs,
572 .crtc_funcs = &cdv_intel_crtc_funcs,
573
574 .output_init = cdv_output_init,
575 .hotplug = cdv_hotplug_event,
576 .hotplug_enable = cdv_hotplug_enable,
577
578 #ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
579 .backlight_init = cdv_backlight_init,
580 #endif
581
582 .init_pm = cdv_init_pm,
583 .save_regs = cdv_save_display_registers,
584 .restore_regs = cdv_restore_display_registers,
585 .power_down = cdv_power_down,
586 .power_up = cdv_power_up,
587 };