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1// SPDX-License-Identifier: GPL-2.0-only
2/**************************************************************************
3 * Copyright (c) 2011, Intel Corporation.
4 * All Rights Reserved.
5 *
6 **************************************************************************/
7
8#include <linux/delay.h>
9
10#include <drm/drm.h>
11#include <drm/drm_crtc_helper.h>
12
13#include "cdv_device.h"
14#include "gma_device.h"
15#include "intel_bios.h"
16#include "psb_drv.h"
17#include "psb_intel_reg.h"
18#include "psb_reg.h"
19
20#define VGA_SR_INDEX 0x3c4
21#define VGA_SR_DATA 0x3c5
22
23static void cdv_disable_vga(struct drm_device *dev)
24{
25 u8 sr1;
26 u32 vga_reg;
27
28 vga_reg = VGACNTRL;
29
30 outb(1, VGA_SR_INDEX);
31 sr1 = inb(VGA_SR_DATA);
32 outb(sr1 | 1<<5, VGA_SR_DATA);
33 udelay(300);
34
35 REG_WRITE(vga_reg, VGA_DISP_DISABLE);
36 REG_READ(vga_reg);
37}
38
39static int cdv_output_init(struct drm_device *dev)
40{
41 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
42
43 drm_mode_create_scaling_mode_property(dev);
44
45 cdv_disable_vga(dev);
46
47 cdv_intel_crt_init(dev, &dev_priv->mode_dev);
48 cdv_intel_lvds_init(dev, &dev_priv->mode_dev);
49
50 /* These bits indicate HDMI not SDVO on CDV */
51 if (REG_READ(SDVOB) & SDVO_DETECTED) {
52 cdv_hdmi_init(dev, &dev_priv->mode_dev, SDVOB);
53 if (REG_READ(DP_B) & DP_DETECTED)
54 cdv_intel_dp_init(dev, &dev_priv->mode_dev, DP_B);
55 }
56
57 if (REG_READ(SDVOC) & SDVO_DETECTED) {
58 cdv_hdmi_init(dev, &dev_priv->mode_dev, SDVOC);
59 if (REG_READ(DP_C) & DP_DETECTED)
60 cdv_intel_dp_init(dev, &dev_priv->mode_dev, DP_C);
61 }
62 return 0;
63}
64
65/*
66 * Cedartrail Backlght Interfaces
67 */
68
69static int cdv_backlight_combination_mode(struct drm_device *dev)
70{
71 return REG_READ(BLC_PWM_CTL2) & PWM_LEGACY_MODE;
72}
73
74static u32 cdv_get_max_backlight(struct drm_device *dev)
75{
76 u32 max = REG_READ(BLC_PWM_CTL);
77
78 if (max == 0) {
79 DRM_DEBUG_KMS("LVDS Panel PWM value is 0!\n");
80 /* i915 does this, I believe which means that we should not
81 * smash PWM control as firmware will take control of it. */
82 return 1;
83 }
84
85 max >>= 16;
86 if (cdv_backlight_combination_mode(dev))
87 max *= 0xff;
88 return max;
89}
90
91static int cdv_get_brightness(struct drm_device *dev)
92{
93 struct pci_dev *pdev = to_pci_dev(dev->dev);
94 u32 val = REG_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
95
96 if (cdv_backlight_combination_mode(dev)) {
97 u8 lbpc;
98
99 val &= ~1;
100 pci_read_config_byte(pdev, 0xF4, &lbpc);
101 val *= lbpc;
102 }
103 return (val * 100)/cdv_get_max_backlight(dev);
104}
105
106static void cdv_set_brightness(struct drm_device *dev, int level)
107{
108 struct pci_dev *pdev = to_pci_dev(dev->dev);
109 u32 blc_pwm_ctl;
110
111 level *= cdv_get_max_backlight(dev);
112 level /= 100;
113
114 if (cdv_backlight_combination_mode(dev)) {
115 u32 max = cdv_get_max_backlight(dev);
116 u8 lbpc;
117
118 lbpc = level * 0xfe / max + 1;
119 level /= lbpc;
120
121 pci_write_config_byte(pdev, 0xF4, lbpc);
122 }
123
124 blc_pwm_ctl = REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
125 REG_WRITE(BLC_PWM_CTL, (blc_pwm_ctl |
126 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
127}
128
129static int cdv_backlight_init(struct drm_device *dev)
130{
131 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
132
133 dev_priv->backlight_level = cdv_get_brightness(dev);
134 cdv_set_brightness(dev, dev_priv->backlight_level);
135
136 return 0;
137}
138
139/*
140 * Provide the Cedarview specific chip logic and low level methods
141 * for power management
142 *
143 * FIXME: we need to implement the apm/ospm base management bits
144 * for this and the MID devices.
145 */
146
147static inline u32 CDV_MSG_READ32(int domain, uint port, uint offset)
148{
149 int mcr = (0x10<<24) | (port << 16) | (offset << 8);
150 uint32_t ret_val = 0;
151 struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
152 pci_write_config_dword(pci_root, 0xD0, mcr);
153 pci_read_config_dword(pci_root, 0xD4, &ret_val);
154 pci_dev_put(pci_root);
155 return ret_val;
156}
157
158static inline void CDV_MSG_WRITE32(int domain, uint port, uint offset,
159 u32 value)
160{
161 int mcr = (0x11<<24) | (port << 16) | (offset << 8) | 0xF0;
162 struct pci_dev *pci_root = pci_get_domain_bus_and_slot(domain, 0, 0);
163 pci_write_config_dword(pci_root, 0xD4, value);
164 pci_write_config_dword(pci_root, 0xD0, mcr);
165 pci_dev_put(pci_root);
166}
167
168#define PSB_PM_SSC 0x20
169#define PSB_PM_SSS 0x30
170#define PSB_PWRGT_GFX_ON 0x02
171#define PSB_PWRGT_GFX_OFF 0x01
172#define PSB_PWRGT_GFX_D0 0x00
173#define PSB_PWRGT_GFX_D3 0x03
174
175static void cdv_init_pm(struct drm_device *dev)
176{
177 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
178 struct pci_dev *pdev = to_pci_dev(dev->dev);
179 u32 pwr_cnt;
180 int domain = pci_domain_nr(pdev->bus);
181 int i;
182
183 dev_priv->apm_base = CDV_MSG_READ32(domain, PSB_PUNIT_PORT,
184 PSB_APMBA) & 0xFFFF;
185 dev_priv->ospm_base = CDV_MSG_READ32(domain, PSB_PUNIT_PORT,
186 PSB_OSPMBA) & 0xFFFF;
187
188 /* Power status */
189 pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
190
191 /* Enable the GPU */
192 pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
193 pwr_cnt |= PSB_PWRGT_GFX_ON;
194 outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
195
196 /* Wait for the GPU power */
197 for (i = 0; i < 5; i++) {
198 u32 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
199 if ((pwr_sts & PSB_PWRGT_GFX_MASK) == 0)
200 return;
201 udelay(10);
202 }
203 dev_err(dev->dev, "GPU: power management timed out.\n");
204}
205
206static void cdv_errata(struct drm_device *dev)
207{
208 struct pci_dev *pdev = to_pci_dev(dev->dev);
209
210 /* Disable bonus launch.
211 * CPU and GPU competes for memory and display misses updates and
212 * flickers. Worst with dual core, dual displays.
213 *
214 * Fixes were done to Win 7 gfx driver to disable a feature called
215 * Bonus Launch to work around the issue, by degrading
216 * performance.
217 */
218 CDV_MSG_WRITE32(pci_domain_nr(pdev->bus), 3, 0x30, 0x08027108);
219}
220
221/**
222 * cdv_save_display_registers - save registers lost on suspend
223 * @dev: our DRM device
224 *
225 * Save the state we need in order to be able to restore the interface
226 * upon resume from suspend
227 */
228static int cdv_save_display_registers(struct drm_device *dev)
229{
230 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
231 struct pci_dev *pdev = to_pci_dev(dev->dev);
232 struct psb_save_area *regs = &dev_priv->regs;
233 struct drm_connector_list_iter conn_iter;
234 struct drm_connector *connector;
235
236 dev_dbg(dev->dev, "Saving GPU registers.\n");
237
238 pci_read_config_byte(pdev, 0xF4, ®s->cdv.saveLBB);
239
240 regs->cdv.saveDSPCLK_GATE_D = REG_READ(DSPCLK_GATE_D);
241 regs->cdv.saveRAMCLK_GATE_D = REG_READ(RAMCLK_GATE_D);
242
243 regs->cdv.saveDSPARB = REG_READ(DSPARB);
244 regs->cdv.saveDSPFW[0] = REG_READ(DSPFW1);
245 regs->cdv.saveDSPFW[1] = REG_READ(DSPFW2);
246 regs->cdv.saveDSPFW[2] = REG_READ(DSPFW3);
247 regs->cdv.saveDSPFW[3] = REG_READ(DSPFW4);
248 regs->cdv.saveDSPFW[4] = REG_READ(DSPFW5);
249 regs->cdv.saveDSPFW[5] = REG_READ(DSPFW6);
250
251 regs->cdv.saveADPA = REG_READ(ADPA);
252
253 regs->cdv.savePP_CONTROL = REG_READ(PP_CONTROL);
254 regs->cdv.savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
255 regs->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
256 regs->saveBLC_PWM_CTL2 = REG_READ(BLC_PWM_CTL2);
257 regs->cdv.saveLVDS = REG_READ(LVDS);
258
259 regs->cdv.savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
260
261 regs->cdv.savePP_ON_DELAYS = REG_READ(PP_ON_DELAYS);
262 regs->cdv.savePP_OFF_DELAYS = REG_READ(PP_OFF_DELAYS);
263 regs->cdv.savePP_CYCLE = REG_READ(PP_CYCLE);
264
265 regs->cdv.saveVGACNTRL = REG_READ(VGACNTRL);
266
267 regs->cdv.saveIER = REG_READ(PSB_INT_ENABLE_R);
268 regs->cdv.saveIMR = REG_READ(PSB_INT_MASK_R);
269
270 drm_connector_list_iter_begin(dev, &conn_iter);
271 drm_for_each_connector_iter(connector, &conn_iter)
272 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
273 drm_connector_list_iter_end(&conn_iter);
274
275 return 0;
276}
277
278/**
279 * cdv_restore_display_registers - restore lost register state
280 * @dev: our DRM device
281 *
282 * Restore register state that was lost during suspend and resume.
283 *
284 * FIXME: review
285 */
286static int cdv_restore_display_registers(struct drm_device *dev)
287{
288 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
289 struct pci_dev *pdev = to_pci_dev(dev->dev);
290 struct psb_save_area *regs = &dev_priv->regs;
291 struct drm_connector_list_iter conn_iter;
292 struct drm_connector *connector;
293 u32 temp;
294
295 pci_write_config_byte(pdev, 0xF4, regs->cdv.saveLBB);
296
297 REG_WRITE(DSPCLK_GATE_D, regs->cdv.saveDSPCLK_GATE_D);
298 REG_WRITE(RAMCLK_GATE_D, regs->cdv.saveRAMCLK_GATE_D);
299
300 /* BIOS does below anyway */
301 REG_WRITE(DPIO_CFG, 0);
302 REG_WRITE(DPIO_CFG, DPIO_MODE_SELECT_0 | DPIO_CMN_RESET_N);
303
304 temp = REG_READ(DPLL_A);
305 if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
306 REG_WRITE(DPLL_A, temp | DPLL_SYNCLOCK_ENABLE);
307 REG_READ(DPLL_A);
308 }
309
310 temp = REG_READ(DPLL_B);
311 if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
312 REG_WRITE(DPLL_B, temp | DPLL_SYNCLOCK_ENABLE);
313 REG_READ(DPLL_B);
314 }
315
316 udelay(500);
317
318 REG_WRITE(DSPFW1, regs->cdv.saveDSPFW[0]);
319 REG_WRITE(DSPFW2, regs->cdv.saveDSPFW[1]);
320 REG_WRITE(DSPFW3, regs->cdv.saveDSPFW[2]);
321 REG_WRITE(DSPFW4, regs->cdv.saveDSPFW[3]);
322 REG_WRITE(DSPFW5, regs->cdv.saveDSPFW[4]);
323 REG_WRITE(DSPFW6, regs->cdv.saveDSPFW[5]);
324
325 REG_WRITE(DSPARB, regs->cdv.saveDSPARB);
326 REG_WRITE(ADPA, regs->cdv.saveADPA);
327
328 REG_WRITE(BLC_PWM_CTL2, regs->saveBLC_PWM_CTL2);
329 REG_WRITE(LVDS, regs->cdv.saveLVDS);
330 REG_WRITE(PFIT_CONTROL, regs->cdv.savePFIT_CONTROL);
331 REG_WRITE(PFIT_PGM_RATIOS, regs->cdv.savePFIT_PGM_RATIOS);
332 REG_WRITE(BLC_PWM_CTL, regs->saveBLC_PWM_CTL);
333 REG_WRITE(PP_ON_DELAYS, regs->cdv.savePP_ON_DELAYS);
334 REG_WRITE(PP_OFF_DELAYS, regs->cdv.savePP_OFF_DELAYS);
335 REG_WRITE(PP_CYCLE, regs->cdv.savePP_CYCLE);
336 REG_WRITE(PP_CONTROL, regs->cdv.savePP_CONTROL);
337
338 REG_WRITE(VGACNTRL, regs->cdv.saveVGACNTRL);
339
340 REG_WRITE(PSB_INT_ENABLE_R, regs->cdv.saveIER);
341 REG_WRITE(PSB_INT_MASK_R, regs->cdv.saveIMR);
342
343 /* Fix arbitration bug */
344 cdv_errata(dev);
345
346 drm_mode_config_reset(dev);
347
348 drm_connector_list_iter_begin(dev, &conn_iter);
349 drm_for_each_connector_iter(connector, &conn_iter)
350 connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
351 drm_connector_list_iter_end(&conn_iter);
352
353 /* Resume the modeset for every activated CRTC */
354 drm_helper_resume_force_mode(dev);
355 return 0;
356}
357
358static int cdv_power_down(struct drm_device *dev)
359{
360 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
361 u32 pwr_cnt, pwr_mask, pwr_sts;
362 int tries = 5;
363
364 pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
365 pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
366 pwr_cnt |= PSB_PWRGT_GFX_OFF;
367 pwr_mask = PSB_PWRGT_GFX_MASK;
368
369 outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
370
371 while (tries--) {
372 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
373 if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D3)
374 return 0;
375 udelay(10);
376 }
377 return 0;
378}
379
380static int cdv_power_up(struct drm_device *dev)
381{
382 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
383 u32 pwr_cnt, pwr_mask, pwr_sts;
384 int tries = 5;
385
386 pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
387 pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
388 pwr_cnt |= PSB_PWRGT_GFX_ON;
389 pwr_mask = PSB_PWRGT_GFX_MASK;
390
391 outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
392
393 while (tries--) {
394 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
395 if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D0)
396 return 0;
397 udelay(10);
398 }
399 return 0;
400}
401
402static void cdv_hotplug_work_func(struct work_struct *work)
403{
404 struct drm_psb_private *dev_priv = container_of(work, struct drm_psb_private,
405 hotplug_work);
406 struct drm_device *dev = &dev_priv->dev;
407
408 /* Just fire off a uevent and let userspace tell us what to do */
409 drm_helper_hpd_irq_event(dev);
410}
411
412/* The core driver has received a hotplug IRQ. We are in IRQ context
413 so extract the needed information and kick off queued processing */
414
415static int cdv_hotplug_event(struct drm_device *dev)
416{
417 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
418 schedule_work(&dev_priv->hotplug_work);
419 REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
420 return 1;
421}
422
423static void cdv_hotplug_enable(struct drm_device *dev, bool on)
424{
425 if (on) {
426 u32 hotplug = REG_READ(PORT_HOTPLUG_EN);
427 hotplug |= HDMIB_HOTPLUG_INT_EN | HDMIC_HOTPLUG_INT_EN |
428 HDMID_HOTPLUG_INT_EN | CRT_HOTPLUG_INT_EN;
429 REG_WRITE(PORT_HOTPLUG_EN, hotplug);
430 } else {
431 REG_WRITE(PORT_HOTPLUG_EN, 0);
432 REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
433 }
434}
435
436static const char *force_audio_names[] = {
437 "off",
438 "auto",
439 "on",
440};
441
442void cdv_intel_attach_force_audio_property(struct drm_connector *connector)
443{
444 struct drm_device *dev = connector->dev;
445 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
446 struct drm_property *prop;
447 int i;
448
449 prop = dev_priv->force_audio_property;
450 if (prop == NULL) {
451 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
452 "audio",
453 ARRAY_SIZE(force_audio_names));
454 if (prop == NULL)
455 return;
456
457 for (i = 0; i < ARRAY_SIZE(force_audio_names); i++)
458 drm_property_add_enum(prop, i-1, force_audio_names[i]);
459
460 dev_priv->force_audio_property = prop;
461 }
462 drm_object_attach_property(&connector->base, prop, 0);
463}
464
465
466static const char *broadcast_rgb_names[] = {
467 "Full",
468 "Limited 16:235",
469};
470
471void cdv_intel_attach_broadcast_rgb_property(struct drm_connector *connector)
472{
473 struct drm_device *dev = connector->dev;
474 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
475 struct drm_property *prop;
476 int i;
477
478 prop = dev_priv->broadcast_rgb_property;
479 if (prop == NULL) {
480 prop = drm_property_create(dev, DRM_MODE_PROP_ENUM,
481 "Broadcast RGB",
482 ARRAY_SIZE(broadcast_rgb_names));
483 if (prop == NULL)
484 return;
485
486 for (i = 0; i < ARRAY_SIZE(broadcast_rgb_names); i++)
487 drm_property_add_enum(prop, i, broadcast_rgb_names[i]);
488
489 dev_priv->broadcast_rgb_property = prop;
490 }
491
492 drm_object_attach_property(&connector->base, prop, 0);
493}
494
495/* Cedarview */
496static const struct psb_offset cdv_regmap[2] = {
497 {
498 .fp0 = FPA0,
499 .fp1 = FPA1,
500 .cntr = DSPACNTR,
501 .conf = PIPEACONF,
502 .src = PIPEASRC,
503 .dpll = DPLL_A,
504 .dpll_md = DPLL_A_MD,
505 .htotal = HTOTAL_A,
506 .hblank = HBLANK_A,
507 .hsync = HSYNC_A,
508 .vtotal = VTOTAL_A,
509 .vblank = VBLANK_A,
510 .vsync = VSYNC_A,
511 .stride = DSPASTRIDE,
512 .size = DSPASIZE,
513 .pos = DSPAPOS,
514 .base = DSPABASE,
515 .surf = DSPASURF,
516 .addr = DSPABASE,
517 .status = PIPEASTAT,
518 .linoff = DSPALINOFF,
519 .tileoff = DSPATILEOFF,
520 .palette = PALETTE_A,
521 },
522 {
523 .fp0 = FPB0,
524 .fp1 = FPB1,
525 .cntr = DSPBCNTR,
526 .conf = PIPEBCONF,
527 .src = PIPEBSRC,
528 .dpll = DPLL_B,
529 .dpll_md = DPLL_B_MD,
530 .htotal = HTOTAL_B,
531 .hblank = HBLANK_B,
532 .hsync = HSYNC_B,
533 .vtotal = VTOTAL_B,
534 .vblank = VBLANK_B,
535 .vsync = VSYNC_B,
536 .stride = DSPBSTRIDE,
537 .size = DSPBSIZE,
538 .pos = DSPBPOS,
539 .base = DSPBBASE,
540 .surf = DSPBSURF,
541 .addr = DSPBBASE,
542 .status = PIPEBSTAT,
543 .linoff = DSPBLINOFF,
544 .tileoff = DSPBTILEOFF,
545 .palette = PALETTE_B,
546 }
547};
548
549static int cdv_chip_setup(struct drm_device *dev)
550{
551 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
552 INIT_WORK(&dev_priv->hotplug_work, cdv_hotplug_work_func);
553
554 dev_priv->use_msi = true;
555 dev_priv->regmap = cdv_regmap;
556 gma_get_core_freq(dev);
557 psb_intel_opregion_init(dev);
558 psb_intel_init_bios(dev);
559 cdv_hotplug_enable(dev, false);
560 return 0;
561}
562
563/* CDV is much like Poulsbo but has MID like SGX offsets and PM */
564
565const struct psb_ops cdv_chip_ops = {
566 .name = "GMA3600/3650",
567 .pipes = 2,
568 .crtcs = 2,
569 .hdmi_mask = (1 << 0) | (1 << 1),
570 .lvds_mask = (1 << 1),
571 .sdvo_mask = (1 << 0),
572 .cursor_needs_phys = 0,
573 .sgx_offset = MRST_SGX_OFFSET,
574 .chip_setup = cdv_chip_setup,
575 .errata = cdv_errata,
576
577 .crtc_helper = &cdv_intel_helper_funcs,
578 .clock_funcs = &cdv_clock_funcs,
579
580 .output_init = cdv_output_init,
581 .hotplug = cdv_hotplug_event,
582 .hotplug_enable = cdv_hotplug_enable,
583
584 .backlight_init = cdv_backlight_init,
585 .backlight_get = cdv_get_brightness,
586 .backlight_set = cdv_set_brightness,
587 .backlight_name = "psb-bl",
588
589 .init_pm = cdv_init_pm,
590 .save_regs = cdv_save_display_registers,
591 .restore_regs = cdv_restore_display_registers,
592 .save_crtc = gma_crtc_save,
593 .restore_crtc = gma_crtc_restore,
594 .power_down = cdv_power_down,
595 .power_up = cdv_power_up,
596 .update_wm = cdv_update_wm,
597 .disable_sr = cdv_disable_sr,
598};
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
33static 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
49static 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
74static struct backlight_device *cdv_backlight_device;
75
76static int cdv_backlight_combination_mode(struct drm_device *dev)
77{
78 return REG_READ(BLC_PWM_CTL2) & PWM_LEGACY_MODE;
79}
80
81static u32 cdv_get_max_backlight(struct drm_device *dev)
82{
83 u32 max = REG_READ(BLC_PWM_CTL);
84
85 if (max == 0) {
86 DRM_DEBUG_KMS("LVDS Panel PWM value is 0!\n");
87 /* i915 does this, I believe which means that we should not
88 * smash PWM control as firmware will take control of it. */
89 return 1;
90 }
91
92 max >>= 16;
93 if (cdv_backlight_combination_mode(dev))
94 max *= 0xff;
95 return max;
96}
97
98static int cdv_get_brightness(struct backlight_device *bd)
99{
100 struct drm_device *dev = bl_get_data(bd);
101 u32 val = REG_READ(BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK;
102
103 if (cdv_backlight_combination_mode(dev)) {
104 u8 lbpc;
105
106 val &= ~1;
107 pci_read_config_byte(dev->pdev, 0xF4, &lbpc);
108 val *= lbpc;
109 }
110 return (val * 100)/cdv_get_max_backlight(dev);
111
112}
113
114static int cdv_set_brightness(struct backlight_device *bd)
115{
116 struct drm_device *dev = bl_get_data(bd);
117 int level = bd->props.brightness;
118 u32 blc_pwm_ctl;
119
120 /* Percentage 1-100% being valid */
121 if (level < 1)
122 level = 1;
123
124 level *= cdv_get_max_backlight(dev);
125 level /= 100;
126
127 if (cdv_backlight_combination_mode(dev)) {
128 u32 max = cdv_get_max_backlight(dev);
129 u8 lbpc;
130
131 lbpc = level * 0xfe / max + 1;
132 level /= lbpc;
133
134 pci_write_config_byte(dev->pdev, 0xF4, lbpc);
135 }
136
137 blc_pwm_ctl = REG_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK;
138 REG_WRITE(BLC_PWM_CTL, (blc_pwm_ctl |
139 (level << BACKLIGHT_DUTY_CYCLE_SHIFT)));
140 return 0;
141}
142
143static const struct backlight_ops cdv_ops = {
144 .get_brightness = cdv_get_brightness,
145 .update_status = cdv_set_brightness,
146};
147
148static int cdv_backlight_init(struct drm_device *dev)
149{
150 struct drm_psb_private *dev_priv = dev->dev_private;
151 struct backlight_properties props;
152
153 memset(&props, 0, sizeof(struct backlight_properties));
154 props.max_brightness = 100;
155 props.type = BACKLIGHT_PLATFORM;
156
157 cdv_backlight_device = backlight_device_register("psb-bl",
158 NULL, (void *)dev, &cdv_ops, &props);
159 if (IS_ERR(cdv_backlight_device))
160 return PTR_ERR(cdv_backlight_device);
161
162 cdv_backlight_device->props.brightness =
163 cdv_get_brightness(cdv_backlight_device);
164 backlight_update_status(cdv_backlight_device);
165 dev_priv->backlight_device = cdv_backlight_device;
166 return 0;
167}
168
169#endif
170
171/*
172 * Provide the Cedarview specific chip logic and low level methods
173 * for power management
174 *
175 * FIXME: we need to implement the apm/ospm base management bits
176 * for this and the MID devices.
177 */
178
179static inline u32 CDV_MSG_READ32(uint port, uint offset)
180{
181 int mcr = (0x10<<24) | (port << 16) | (offset << 8);
182 uint32_t ret_val = 0;
183 struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
184 pci_write_config_dword(pci_root, 0xD0, mcr);
185 pci_read_config_dword(pci_root, 0xD4, &ret_val);
186 pci_dev_put(pci_root);
187 return ret_val;
188}
189
190static inline void CDV_MSG_WRITE32(uint port, uint offset, u32 value)
191{
192 int mcr = (0x11<<24) | (port << 16) | (offset << 8) | 0xF0;
193 struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
194 pci_write_config_dword(pci_root, 0xD4, value);
195 pci_write_config_dword(pci_root, 0xD0, mcr);
196 pci_dev_put(pci_root);
197}
198
199#define PSB_PM_SSC 0x20
200#define PSB_PM_SSS 0x30
201#define PSB_PWRGT_GFX_ON 0x02
202#define PSB_PWRGT_GFX_OFF 0x01
203#define PSB_PWRGT_GFX_D0 0x00
204#define PSB_PWRGT_GFX_D3 0x03
205
206static void cdv_init_pm(struct drm_device *dev)
207{
208 struct drm_psb_private *dev_priv = dev->dev_private;
209 u32 pwr_cnt;
210 int i;
211
212 dev_priv->apm_base = CDV_MSG_READ32(PSB_PUNIT_PORT,
213 PSB_APMBA) & 0xFFFF;
214 dev_priv->ospm_base = CDV_MSG_READ32(PSB_PUNIT_PORT,
215 PSB_OSPMBA) & 0xFFFF;
216
217 /* Power status */
218 pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
219
220 /* Enable the GPU */
221 pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
222 pwr_cnt |= PSB_PWRGT_GFX_ON;
223 outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
224
225 /* Wait for the GPU power */
226 for (i = 0; i < 5; i++) {
227 u32 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
228 if ((pwr_sts & PSB_PWRGT_GFX_MASK) == 0)
229 return;
230 udelay(10);
231 }
232 dev_err(dev->dev, "GPU: power management timed out.\n");
233}
234
235static void cdv_errata(struct drm_device *dev)
236{
237 /* Disable bonus launch.
238 * CPU and GPU competes for memory and display misses updates and
239 * flickers. Worst with dual core, dual displays.
240 *
241 * Fixes were done to Win 7 gfx driver to disable a feature called
242 * Bonus Launch to work around the issue, by degrading
243 * performance.
244 */
245 CDV_MSG_WRITE32(3, 0x30, 0x08027108);
246}
247
248/**
249 * cdv_save_display_registers - save registers lost on suspend
250 * @dev: our DRM device
251 *
252 * Save the state we need in order to be able to restore the interface
253 * upon resume from suspend
254 */
255static int cdv_save_display_registers(struct drm_device *dev)
256{
257 struct drm_psb_private *dev_priv = dev->dev_private;
258 struct psb_save_area *regs = &dev_priv->regs;
259 struct drm_connector *connector;
260
261 dev_dbg(dev->dev, "Saving GPU registers.\n");
262
263 pci_read_config_byte(dev->pdev, 0xF4, ®s->cdv.saveLBB);
264
265 regs->cdv.saveDSPCLK_GATE_D = REG_READ(DSPCLK_GATE_D);
266 regs->cdv.saveRAMCLK_GATE_D = REG_READ(RAMCLK_GATE_D);
267
268 regs->cdv.saveDSPARB = REG_READ(DSPARB);
269 regs->cdv.saveDSPFW[0] = REG_READ(DSPFW1);
270 regs->cdv.saveDSPFW[1] = REG_READ(DSPFW2);
271 regs->cdv.saveDSPFW[2] = REG_READ(DSPFW3);
272 regs->cdv.saveDSPFW[3] = REG_READ(DSPFW4);
273 regs->cdv.saveDSPFW[4] = REG_READ(DSPFW5);
274 regs->cdv.saveDSPFW[5] = REG_READ(DSPFW6);
275
276 regs->cdv.saveADPA = REG_READ(ADPA);
277
278 regs->cdv.savePP_CONTROL = REG_READ(PP_CONTROL);
279 regs->cdv.savePFIT_PGM_RATIOS = REG_READ(PFIT_PGM_RATIOS);
280 regs->saveBLC_PWM_CTL = REG_READ(BLC_PWM_CTL);
281 regs->saveBLC_PWM_CTL2 = REG_READ(BLC_PWM_CTL2);
282 regs->cdv.saveLVDS = REG_READ(LVDS);
283
284 regs->cdv.savePFIT_CONTROL = REG_READ(PFIT_CONTROL);
285
286 regs->cdv.savePP_ON_DELAYS = REG_READ(PP_ON_DELAYS);
287 regs->cdv.savePP_OFF_DELAYS = REG_READ(PP_OFF_DELAYS);
288 regs->cdv.savePP_CYCLE = REG_READ(PP_CYCLE);
289
290 regs->cdv.saveVGACNTRL = REG_READ(VGACNTRL);
291
292 regs->cdv.saveIER = REG_READ(PSB_INT_ENABLE_R);
293 regs->cdv.saveIMR = REG_READ(PSB_INT_MASK_R);
294
295 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
296 connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
297
298 return 0;
299}
300
301/**
302 * cdv_restore_display_registers - restore lost register state
303 * @dev: our DRM device
304 *
305 * Restore register state that was lost during suspend and resume.
306 *
307 * FIXME: review
308 */
309static int cdv_restore_display_registers(struct drm_device *dev)
310{
311 struct drm_psb_private *dev_priv = dev->dev_private;
312 struct psb_save_area *regs = &dev_priv->regs;
313 struct drm_connector *connector;
314 u32 temp;
315
316 pci_write_config_byte(dev->pdev, 0xF4, regs->cdv.saveLBB);
317
318 REG_WRITE(DSPCLK_GATE_D, regs->cdv.saveDSPCLK_GATE_D);
319 REG_WRITE(RAMCLK_GATE_D, regs->cdv.saveRAMCLK_GATE_D);
320
321 /* BIOS does below anyway */
322 REG_WRITE(DPIO_CFG, 0);
323 REG_WRITE(DPIO_CFG, DPIO_MODE_SELECT_0 | DPIO_CMN_RESET_N);
324
325 temp = REG_READ(DPLL_A);
326 if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
327 REG_WRITE(DPLL_A, temp | DPLL_SYNCLOCK_ENABLE);
328 REG_READ(DPLL_A);
329 }
330
331 temp = REG_READ(DPLL_B);
332 if ((temp & DPLL_SYNCLOCK_ENABLE) == 0) {
333 REG_WRITE(DPLL_B, temp | DPLL_SYNCLOCK_ENABLE);
334 REG_READ(DPLL_B);
335 }
336
337 udelay(500);
338
339 REG_WRITE(DSPFW1, regs->cdv.saveDSPFW[0]);
340 REG_WRITE(DSPFW2, regs->cdv.saveDSPFW[1]);
341 REG_WRITE(DSPFW3, regs->cdv.saveDSPFW[2]);
342 REG_WRITE(DSPFW4, regs->cdv.saveDSPFW[3]);
343 REG_WRITE(DSPFW5, regs->cdv.saveDSPFW[4]);
344 REG_WRITE(DSPFW6, regs->cdv.saveDSPFW[5]);
345
346 REG_WRITE(DSPARB, regs->cdv.saveDSPARB);
347 REG_WRITE(ADPA, regs->cdv.saveADPA);
348
349 REG_WRITE(BLC_PWM_CTL2, regs->saveBLC_PWM_CTL2);
350 REG_WRITE(LVDS, regs->cdv.saveLVDS);
351 REG_WRITE(PFIT_CONTROL, regs->cdv.savePFIT_CONTROL);
352 REG_WRITE(PFIT_PGM_RATIOS, regs->cdv.savePFIT_PGM_RATIOS);
353 REG_WRITE(BLC_PWM_CTL, regs->saveBLC_PWM_CTL);
354 REG_WRITE(PP_ON_DELAYS, regs->cdv.savePP_ON_DELAYS);
355 REG_WRITE(PP_OFF_DELAYS, regs->cdv.savePP_OFF_DELAYS);
356 REG_WRITE(PP_CYCLE, regs->cdv.savePP_CYCLE);
357 REG_WRITE(PP_CONTROL, regs->cdv.savePP_CONTROL);
358
359 REG_WRITE(VGACNTRL, regs->cdv.saveVGACNTRL);
360
361 REG_WRITE(PSB_INT_ENABLE_R, regs->cdv.saveIER);
362 REG_WRITE(PSB_INT_MASK_R, regs->cdv.saveIMR);
363
364 /* Fix arbitration bug */
365 cdv_errata(dev);
366
367 drm_mode_config_reset(dev);
368
369 list_for_each_entry(connector, &dev->mode_config.connector_list, head)
370 connector->funcs->dpms(connector, DRM_MODE_DPMS_ON);
371
372 /* Resume the modeset for every activated CRTC */
373 drm_helper_resume_force_mode(dev);
374 return 0;
375}
376
377static int cdv_power_down(struct drm_device *dev)
378{
379 struct drm_psb_private *dev_priv = dev->dev_private;
380 u32 pwr_cnt, pwr_mask, pwr_sts;
381 int tries = 5;
382
383 pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
384 pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
385 pwr_cnt |= PSB_PWRGT_GFX_OFF;
386 pwr_mask = PSB_PWRGT_GFX_MASK;
387
388 outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
389
390 while (tries--) {
391 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
392 if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D3)
393 return 0;
394 udelay(10);
395 }
396 return 0;
397}
398
399static int cdv_power_up(struct drm_device *dev)
400{
401 struct drm_psb_private *dev_priv = dev->dev_private;
402 u32 pwr_cnt, pwr_mask, pwr_sts;
403 int tries = 5;
404
405 pwr_cnt = inl(dev_priv->apm_base + PSB_APM_CMD);
406 pwr_cnt &= ~PSB_PWRGT_GFX_MASK;
407 pwr_cnt |= PSB_PWRGT_GFX_ON;
408 pwr_mask = PSB_PWRGT_GFX_MASK;
409
410 outl(pwr_cnt, dev_priv->apm_base + PSB_APM_CMD);
411
412 while (tries--) {
413 pwr_sts = inl(dev_priv->apm_base + PSB_APM_STS);
414 if ((pwr_sts & pwr_mask) == PSB_PWRGT_GFX_D0)
415 return 0;
416 udelay(10);
417 }
418 return 0;
419}
420
421/* FIXME ? - shared with Poulsbo */
422static void cdv_get_core_freq(struct drm_device *dev)
423{
424 uint32_t clock;
425 struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
426 struct drm_psb_private *dev_priv = dev->dev_private;
427
428 pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
429 pci_read_config_dword(pci_root, 0xD4, &clock);
430 pci_dev_put(pci_root);
431
432 switch (clock & 0x07) {
433 case 0:
434 dev_priv->core_freq = 100;
435 break;
436 case 1:
437 dev_priv->core_freq = 133;
438 break;
439 case 2:
440 dev_priv->core_freq = 150;
441 break;
442 case 3:
443 dev_priv->core_freq = 178;
444 break;
445 case 4:
446 dev_priv->core_freq = 200;
447 break;
448 case 5:
449 case 6:
450 case 7:
451 dev_priv->core_freq = 266;
452 default:
453 dev_priv->core_freq = 0;
454 }
455}
456
457static void cdv_hotplug_work_func(struct work_struct *work)
458{
459 struct drm_psb_private *dev_priv = container_of(work, struct drm_psb_private,
460 hotplug_work);
461 struct drm_device *dev = dev_priv->dev;
462
463 /* Just fire off a uevent and let userspace tell us what to do */
464 drm_helper_hpd_irq_event(dev);
465}
466
467/* The core driver has received a hotplug IRQ. We are in IRQ context
468 so extract the needed information and kick off queued processing */
469
470static int cdv_hotplug_event(struct drm_device *dev)
471{
472 struct drm_psb_private *dev_priv = dev->dev_private;
473 schedule_work(&dev_priv->hotplug_work);
474 REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
475 return 1;
476}
477
478static void cdv_hotplug_enable(struct drm_device *dev, bool on)
479{
480 if (on) {
481 u32 hotplug = REG_READ(PORT_HOTPLUG_EN);
482 hotplug |= HDMIB_HOTPLUG_INT_EN | HDMIC_HOTPLUG_INT_EN |
483 HDMID_HOTPLUG_INT_EN | CRT_HOTPLUG_INT_EN;
484 REG_WRITE(PORT_HOTPLUG_EN, hotplug);
485 } else {
486 REG_WRITE(PORT_HOTPLUG_EN, 0);
487 REG_WRITE(PORT_HOTPLUG_STAT, REG_READ(PORT_HOTPLUG_STAT));
488 }
489}
490
491/* Cedarview */
492static const struct psb_offset cdv_regmap[2] = {
493 {
494 .fp0 = FPA0,
495 .fp1 = FPA1,
496 .cntr = DSPACNTR,
497 .conf = PIPEACONF,
498 .src = PIPEASRC,
499 .dpll = DPLL_A,
500 .dpll_md = DPLL_A_MD,
501 .htotal = HTOTAL_A,
502 .hblank = HBLANK_A,
503 .hsync = HSYNC_A,
504 .vtotal = VTOTAL_A,
505 .vblank = VBLANK_A,
506 .vsync = VSYNC_A,
507 .stride = DSPASTRIDE,
508 .size = DSPASIZE,
509 .pos = DSPAPOS,
510 .base = DSPABASE,
511 .surf = DSPASURF,
512 .addr = DSPABASE,
513 .status = PIPEASTAT,
514 .linoff = DSPALINOFF,
515 .tileoff = DSPATILEOFF,
516 .palette = PALETTE_A,
517 },
518 {
519 .fp0 = FPB0,
520 .fp1 = FPB1,
521 .cntr = DSPBCNTR,
522 .conf = PIPEBCONF,
523 .src = PIPEBSRC,
524 .dpll = DPLL_B,
525 .dpll_md = DPLL_B_MD,
526 .htotal = HTOTAL_B,
527 .hblank = HBLANK_B,
528 .hsync = HSYNC_B,
529 .vtotal = VTOTAL_B,
530 .vblank = VBLANK_B,
531 .vsync = VSYNC_B,
532 .stride = DSPBSTRIDE,
533 .size = DSPBSIZE,
534 .pos = DSPBPOS,
535 .base = DSPBBASE,
536 .surf = DSPBSURF,
537 .addr = DSPBBASE,
538 .status = PIPEBSTAT,
539 .linoff = DSPBLINOFF,
540 .tileoff = DSPBTILEOFF,
541 .palette = PALETTE_B,
542 }
543};
544
545static int cdv_chip_setup(struct drm_device *dev)
546{
547 struct drm_psb_private *dev_priv = dev->dev_private;
548 INIT_WORK(&dev_priv->hotplug_work, cdv_hotplug_work_func);
549
550 if (pci_enable_msi(dev->pdev))
551 dev_warn(dev->dev, "Enabling MSI failed!\n");
552 dev_priv->regmap = cdv_regmap;
553 cdv_get_core_freq(dev);
554 psb_intel_opregion_init(dev);
555 psb_intel_init_bios(dev);
556 cdv_hotplug_enable(dev, false);
557 return 0;
558}
559
560/* CDV is much like Poulsbo but has MID like SGX offsets and PM */
561
562const struct psb_ops cdv_chip_ops = {
563 .name = "GMA3600/3650",
564 .accel_2d = 0,
565 .pipes = 2,
566 .crtcs = 2,
567 .hdmi_mask = (1 << 0) | (1 << 1),
568 .lvds_mask = (1 << 1),
569 .cursor_needs_phys = 0,
570 .sgx_offset = MRST_SGX_OFFSET,
571 .chip_setup = cdv_chip_setup,
572 .errata = cdv_errata,
573
574 .crtc_helper = &cdv_intel_helper_funcs,
575 .crtc_funcs = &cdv_intel_crtc_funcs,
576
577 .output_init = cdv_output_init,
578 .hotplug = cdv_hotplug_event,
579 .hotplug_enable = cdv_hotplug_enable,
580
581#ifdef CONFIG_BACKLIGHT_CLASS_DEVICE
582 .backlight_init = cdv_backlight_init,
583#endif
584
585 .init_pm = cdv_init_pm,
586 .save_regs = cdv_save_display_registers,
587 .restore_regs = cdv_restore_display_registers,
588 .power_down = cdv_power_down,
589 .power_up = cdv_power_up,
590};