1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright © 2006-2011 Intel Corporation
4 *
5 * Authors:
6 * Eric Anholt <eric@anholt.net>
7 * Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
8 */
9
10 #include <linux/delay.h>
11 #include <linux/highmem.h>
12
13 #include <drm/drm_crtc.h>
14 #include <drm/drm_crtc_helper.h>
15 #include <drm/drm_fourcc.h>
16 #include <drm/drm_framebuffer.h>
17 #include <drm/drm_modeset_helper_vtables.h>
18 #include <drm/drm_vblank.h>
19
20 #include "framebuffer.h"
21 #include "gem.h"
22 #include "gma_display.h"
23 #include "psb_irq.h"
24 #include "psb_intel_drv.h"
25 #include "psb_intel_reg.h"
26
27 /*
28 * Returns whether any output on the specified pipe is of the specified type
29 */
gma_pipe_has_type(struct drm_crtc * crtc,int type)30 bool gma_pipe_has_type(struct drm_crtc *crtc, int type)
31 {
32 struct drm_device *dev = crtc->dev;
33 struct drm_connector_list_iter conn_iter;
34 struct drm_connector *connector;
35
36 drm_connector_list_iter_begin(dev, &conn_iter);
37 drm_for_each_connector_iter(connector, &conn_iter) {
38 if (connector->encoder && connector->encoder->crtc == crtc) {
39 struct gma_encoder *gma_encoder =
40 gma_attached_encoder(connector);
41 if (gma_encoder->type == type) {
42 drm_connector_list_iter_end(&conn_iter);
43 return true;
44 }
45 }
46 }
47 drm_connector_list_iter_end(&conn_iter);
48
49 return false;
50 }
51
gma_wait_for_vblank(struct drm_device * dev)52 void gma_wait_for_vblank(struct drm_device *dev)
53 {
54 /* Wait for 20ms, i.e. one cycle at 50hz. */
55 mdelay(20);
56 }
57
gma_pipe_set_base(struct drm_crtc * crtc,int x,int y,struct drm_framebuffer * old_fb)58 int gma_pipe_set_base(struct drm_crtc *crtc, int x, int y,
59 struct drm_framebuffer *old_fb)
60 {
61 struct drm_device *dev = crtc->dev;
62 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
63 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
64 struct drm_framebuffer *fb = crtc->primary->fb;
65 struct psb_gem_object *pobj;
66 int pipe = gma_crtc->pipe;
67 const struct psb_offset *map = &dev_priv->regmap[pipe];
68 unsigned long start, offset;
69 u32 dspcntr;
70 int ret = 0;
71
72 if (!gma_power_begin(dev, true))
73 return 0;
74
75 /* no fb bound */
76 if (!fb) {
77 dev_err(dev->dev, "No FB bound\n");
78 goto gma_pipe_cleaner;
79 }
80
81 pobj = to_psb_gem_object(fb->obj[0]);
82
83 /* We are displaying this buffer, make sure it is actually loaded
84 into the GTT */
85 ret = psb_gem_pin(pobj);
86 if (ret < 0)
87 goto gma_pipe_set_base_exit;
88 start = pobj->offset;
89 offset = y * fb->pitches[0] + x * fb->format->cpp[0];
90
91 REG_WRITE(map->stride, fb->pitches[0]);
92
93 dspcntr = REG_READ(map->cntr);
94 dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
95
96 switch (fb->format->cpp[0] * 8) {
97 case 8:
98 dspcntr |= DISPPLANE_8BPP;
99 break;
100 case 16:
101 if (fb->format->depth == 15)
102 dspcntr |= DISPPLANE_15_16BPP;
103 else
104 dspcntr |= DISPPLANE_16BPP;
105 break;
106 case 24:
107 case 32:
108 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
109 break;
110 default:
111 dev_err(dev->dev, "Unknown color depth\n");
112 ret = -EINVAL;
113 goto gma_pipe_set_base_exit;
114 }
115 REG_WRITE(map->cntr, dspcntr);
116
117 dev_dbg(dev->dev,
118 "Writing base %08lX %08lX %d %d\n", start, offset, x, y);
119
120 /* FIXME: Investigate whether this really is the base for psb and why
121 the linear offset is named base for the other chips. map->surf
122 should be the base and map->linoff the offset for all chips */
123 if (IS_PSB(dev)) {
124 REG_WRITE(map->base, offset + start);
125 REG_READ(map->base);
126 } else {
127 REG_WRITE(map->base, offset);
128 REG_READ(map->base);
129 REG_WRITE(map->surf, start);
130 REG_READ(map->surf);
131 }
132
133 gma_pipe_cleaner:
134 /* If there was a previous display we can now unpin it */
135 if (old_fb)
136 psb_gem_unpin(to_psb_gem_object(old_fb->obj[0]));
137
138 gma_pipe_set_base_exit:
139 gma_power_end(dev);
140 return ret;
141 }
142
143 /* Loads the palette/gamma unit for the CRTC with the prepared values */
gma_crtc_load_lut(struct drm_crtc * crtc)144 void gma_crtc_load_lut(struct drm_crtc *crtc)
145 {
146 struct drm_device *dev = crtc->dev;
147 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
148 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
149 const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
150 int palreg = map->palette;
151 u16 *r, *g, *b;
152 int i;
153
154 /* The clocks have to be on to load the palette. */
155 if (!crtc->enabled)
156 return;
157
158 r = crtc->gamma_store;
159 g = r + crtc->gamma_size;
160 b = g + crtc->gamma_size;
161
162 if (gma_power_begin(dev, false)) {
163 for (i = 0; i < 256; i++) {
164 REG_WRITE(palreg + 4 * i,
165 (((*r++ >> 8) + gma_crtc->lut_adj[i]) << 16) |
166 (((*g++ >> 8) + gma_crtc->lut_adj[i]) << 8) |
167 ((*b++ >> 8) + gma_crtc->lut_adj[i]));
168 }
169 gma_power_end(dev);
170 } else {
171 for (i = 0; i < 256; i++) {
172 /* FIXME: Why pipe[0] and not pipe[..._crtc->pipe]? */
173 dev_priv->regs.pipe[0].palette[i] =
174 (((*r++ >> 8) + gma_crtc->lut_adj[i]) << 16) |
175 (((*g++ >> 8) + gma_crtc->lut_adj[i]) << 8) |
176 ((*b++ >> 8) + gma_crtc->lut_adj[i]);
177 }
178
179 }
180 }
181
gma_crtc_gamma_set(struct drm_crtc * crtc,u16 * red,u16 * green,u16 * blue,u32 size,struct drm_modeset_acquire_ctx * ctx)182 static int gma_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
183 u16 *blue, u32 size,
184 struct drm_modeset_acquire_ctx *ctx)
185 {
186 gma_crtc_load_lut(crtc);
187
188 return 0;
189 }
190
191 /*
192 * Sets the power management mode of the pipe and plane.
193 *
194 * This code should probably grow support for turning the cursor off and back
195 * on appropriately at the same time as we're turning the pipe off/on.
196 */
gma_crtc_dpms(struct drm_crtc * crtc,int mode)197 void gma_crtc_dpms(struct drm_crtc *crtc, int mode)
198 {
199 struct drm_device *dev = crtc->dev;
200 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
201 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
202 int pipe = gma_crtc->pipe;
203 const struct psb_offset *map = &dev_priv->regmap[pipe];
204 u32 temp;
205
206 /* XXX: When our outputs are all unaware of DPMS modes other than off
207 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
208 */
209
210 if (IS_CDV(dev))
211 dev_priv->ops->disable_sr(dev);
212
213 switch (mode) {
214 case DRM_MODE_DPMS_ON:
215 case DRM_MODE_DPMS_STANDBY:
216 case DRM_MODE_DPMS_SUSPEND:
217 if (gma_crtc->active)
218 break;
219
220 gma_crtc->active = true;
221
222 /* Enable the DPLL */
223 temp = REG_READ(map->dpll);
224 if ((temp & DPLL_VCO_ENABLE) == 0) {
225 REG_WRITE(map->dpll, temp);
226 REG_READ(map->dpll);
227 /* Wait for the clocks to stabilize. */
228 udelay(150);
229 REG_WRITE(map->dpll, temp | DPLL_VCO_ENABLE);
230 REG_READ(map->dpll);
231 /* Wait for the clocks to stabilize. */
232 udelay(150);
233 REG_WRITE(map->dpll, temp | DPLL_VCO_ENABLE);
234 REG_READ(map->dpll);
235 /* Wait for the clocks to stabilize. */
236 udelay(150);
237 }
238
239 /* Enable the plane */
240 temp = REG_READ(map->cntr);
241 if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
242 REG_WRITE(map->cntr,
243 temp | DISPLAY_PLANE_ENABLE);
244 /* Flush the plane changes */
245 REG_WRITE(map->base, REG_READ(map->base));
246 }
247
248 udelay(150);
249
250 /* Enable the pipe */
251 temp = REG_READ(map->conf);
252 if ((temp & PIPEACONF_ENABLE) == 0)
253 REG_WRITE(map->conf, temp | PIPEACONF_ENABLE);
254
255 temp = REG_READ(map->status);
256 temp &= ~(0xFFFF);
257 temp |= PIPE_FIFO_UNDERRUN;
258 REG_WRITE(map->status, temp);
259 REG_READ(map->status);
260
261 gma_crtc_load_lut(crtc);
262
263 /* Give the overlay scaler a chance to enable
264 * if it's on this pipe */
265 /* psb_intel_crtc_dpms_video(crtc, true); TODO */
266
267 drm_crtc_vblank_on(crtc);
268 break;
269 case DRM_MODE_DPMS_OFF:
270 if (!gma_crtc->active)
271 break;
272
273 gma_crtc->active = false;
274
275 /* Give the overlay scaler a chance to disable
276 * if it's on this pipe */
277 /* psb_intel_crtc_dpms_video(crtc, FALSE); TODO */
278
279 /* Disable the VGA plane that we never use */
280 REG_WRITE(VGACNTRL, VGA_DISP_DISABLE);
281
282 /* Turn off vblank interrupts */
283 drm_crtc_vblank_off(crtc);
284
285 /* Wait for vblank for the disable to take effect */
286 gma_wait_for_vblank(dev);
287
288 /* Disable plane */
289 temp = REG_READ(map->cntr);
290 if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
291 REG_WRITE(map->cntr,
292 temp & ~DISPLAY_PLANE_ENABLE);
293 /* Flush the plane changes */
294 REG_WRITE(map->base, REG_READ(map->base));
295 REG_READ(map->base);
296 }
297
298 /* Disable pipe */
299 temp = REG_READ(map->conf);
300 if ((temp & PIPEACONF_ENABLE) != 0) {
301 REG_WRITE(map->conf, temp & ~PIPEACONF_ENABLE);
302 REG_READ(map->conf);
303 }
304
305 /* Wait for vblank for the disable to take effect. */
306 gma_wait_for_vblank(dev);
307
308 udelay(150);
309
310 /* Disable DPLL */
311 temp = REG_READ(map->dpll);
312 if ((temp & DPLL_VCO_ENABLE) != 0) {
313 REG_WRITE(map->dpll, temp & ~DPLL_VCO_ENABLE);
314 REG_READ(map->dpll);
315 }
316
317 /* Wait for the clocks to turn off. */
318 udelay(150);
319 break;
320 }
321
322 if (IS_CDV(dev))
323 dev_priv->ops->update_wm(dev, crtc);
324
325 /* Set FIFO watermarks */
326 REG_WRITE(DSPARB, 0x3F3E);
327 }
328
gma_crtc_cursor_set(struct drm_crtc * crtc,struct drm_file * file_priv,uint32_t handle,uint32_t width,uint32_t height)329 static int gma_crtc_cursor_set(struct drm_crtc *crtc,
330 struct drm_file *file_priv, uint32_t handle,
331 uint32_t width, uint32_t height)
332 {
333 struct drm_device *dev = crtc->dev;
334 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
335 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
336 int pipe = gma_crtc->pipe;
337 uint32_t control = (pipe == 0) ? CURACNTR : CURBCNTR;
338 uint32_t base = (pipe == 0) ? CURABASE : CURBBASE;
339 uint32_t temp;
340 size_t addr = 0;
341 struct psb_gem_object *pobj;
342 struct psb_gem_object *cursor_pobj = gma_crtc->cursor_pobj;
343 struct drm_gem_object *obj;
344 void *tmp_dst;
345 int ret = 0, i, cursor_pages;
346
347 /* If we didn't get a handle then turn the cursor off */
348 if (!handle) {
349 temp = CURSOR_MODE_DISABLE;
350 if (gma_power_begin(dev, false)) {
351 REG_WRITE(control, temp);
352 REG_WRITE(base, 0);
353 gma_power_end(dev);
354 }
355
356 /* Unpin the old GEM object */
357 if (gma_crtc->cursor_obj) {
358 pobj = to_psb_gem_object(gma_crtc->cursor_obj);
359 psb_gem_unpin(pobj);
360 drm_gem_object_put(gma_crtc->cursor_obj);
361 gma_crtc->cursor_obj = NULL;
362 }
363 return 0;
364 }
365
366 /* Currently we only support 64x64 cursors */
367 if (width != 64 || height != 64) {
368 dev_dbg(dev->dev, "We currently only support 64x64 cursors\n");
369 return -EINVAL;
370 }
371
372 obj = drm_gem_object_lookup(file_priv, handle);
373 if (!obj) {
374 ret = -ENOENT;
375 goto unlock;
376 }
377
378 if (obj->size < width * height * 4) {
379 dev_dbg(dev->dev, "Buffer is too small\n");
380 ret = -ENOMEM;
381 goto unref_cursor;
382 }
383
384 pobj = to_psb_gem_object(obj);
385
386 /* Pin the memory into the GTT */
387 ret = psb_gem_pin(pobj);
388 if (ret) {
389 dev_err(dev->dev, "Can not pin down handle 0x%x\n", handle);
390 goto unref_cursor;
391 }
392
393 if (dev_priv->ops->cursor_needs_phys) {
394 if (!cursor_pobj) {
395 dev_err(dev->dev, "No hardware cursor mem available");
396 ret = -ENOMEM;
397 goto unref_cursor;
398 }
399
400 cursor_pages = obj->size / PAGE_SIZE;
401 if (cursor_pages > 4)
402 cursor_pages = 4; /* Prevent overflow */
403
404 /* Copy the cursor to cursor mem */
405 tmp_dst = dev_priv->vram_addr + cursor_pobj->offset;
406 for (i = 0; i < cursor_pages; i++) {
407 memcpy_from_page(tmp_dst, pobj->pages[i], 0, PAGE_SIZE);
408 tmp_dst += PAGE_SIZE;
409 }
410
411 addr = gma_crtc->cursor_addr;
412 } else {
413 addr = pobj->offset;
414 gma_crtc->cursor_addr = addr;
415 }
416
417 temp = 0;
418 /* set the pipe for the cursor */
419 temp |= (pipe << 28);
420 temp |= CURSOR_MODE_64_ARGB_AX | MCURSOR_GAMMA_ENABLE;
421
422 if (gma_power_begin(dev, false)) {
423 REG_WRITE(control, temp);
424 REG_WRITE(base, addr);
425 gma_power_end(dev);
426 }
427
428 /* unpin the old bo */
429 if (gma_crtc->cursor_obj) {
430 pobj = to_psb_gem_object(gma_crtc->cursor_obj);
431 psb_gem_unpin(pobj);
432 drm_gem_object_put(gma_crtc->cursor_obj);
433 }
434
435 gma_crtc->cursor_obj = obj;
436 unlock:
437 return ret;
438
439 unref_cursor:
440 drm_gem_object_put(obj);
441 return ret;
442 }
443
gma_crtc_cursor_move(struct drm_crtc * crtc,int x,int y)444 static int gma_crtc_cursor_move(struct drm_crtc *crtc, int x, int y)
445 {
446 struct drm_device *dev = crtc->dev;
447 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
448 int pipe = gma_crtc->pipe;
449 uint32_t temp = 0;
450 uint32_t addr;
451
452 if (x < 0) {
453 temp |= (CURSOR_POS_SIGN << CURSOR_X_SHIFT);
454 x = -x;
455 }
456 if (y < 0) {
457 temp |= (CURSOR_POS_SIGN << CURSOR_Y_SHIFT);
458 y = -y;
459 }
460
461 temp |= ((x & CURSOR_POS_MASK) << CURSOR_X_SHIFT);
462 temp |= ((y & CURSOR_POS_MASK) << CURSOR_Y_SHIFT);
463
464 addr = gma_crtc->cursor_addr;
465
466 if (gma_power_begin(dev, false)) {
467 REG_WRITE((pipe == 0) ? CURAPOS : CURBPOS, temp);
468 REG_WRITE((pipe == 0) ? CURABASE : CURBBASE, addr);
469 gma_power_end(dev);
470 }
471 return 0;
472 }
473
gma_crtc_prepare(struct drm_crtc * crtc)474 void gma_crtc_prepare(struct drm_crtc *crtc)
475 {
476 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
477 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
478 }
479
gma_crtc_commit(struct drm_crtc * crtc)480 void gma_crtc_commit(struct drm_crtc *crtc)
481 {
482 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
483 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
484 }
485
gma_crtc_disable(struct drm_crtc * crtc)486 void gma_crtc_disable(struct drm_crtc *crtc)
487 {
488 struct psb_gem_object *pobj;
489 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
490
491 crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
492
493 if (crtc->primary->fb) {
494 pobj = to_psb_gem_object(crtc->primary->fb->obj[0]);
495 psb_gem_unpin(pobj);
496 }
497 }
498
gma_crtc_destroy(struct drm_crtc * crtc)499 void gma_crtc_destroy(struct drm_crtc *crtc)
500 {
501 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
502
503 if (gma_crtc->cursor_pobj)
504 drm_gem_object_put(&gma_crtc->cursor_pobj->base);
505
506 kfree(gma_crtc->crtc_state);
507 drm_crtc_cleanup(crtc);
508 kfree(gma_crtc);
509 }
510
gma_crtc_page_flip(struct drm_crtc * crtc,struct drm_framebuffer * fb,struct drm_pending_vblank_event * event,uint32_t page_flip_flags,struct drm_modeset_acquire_ctx * ctx)511 int gma_crtc_page_flip(struct drm_crtc *crtc,
512 struct drm_framebuffer *fb,
513 struct drm_pending_vblank_event *event,
514 uint32_t page_flip_flags,
515 struct drm_modeset_acquire_ctx *ctx)
516 {
517 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
518 struct drm_framebuffer *current_fb = crtc->primary->fb;
519 struct drm_framebuffer *old_fb = crtc->primary->old_fb;
520 const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
521 struct drm_device *dev = crtc->dev;
522 unsigned long flags;
523 int ret;
524
525 if (!crtc_funcs->mode_set_base)
526 return -EINVAL;
527
528 /* Using mode_set_base requires the new fb to be set already. */
529 crtc->primary->fb = fb;
530
531 if (event) {
532 spin_lock_irqsave(&dev->event_lock, flags);
533
534 WARN_ON(drm_crtc_vblank_get(crtc) != 0);
535
536 gma_crtc->page_flip_event = event;
537 spin_unlock_irqrestore(&dev->event_lock, flags);
538
539 /* Call this locked if we want an event at vblank interrupt. */
540 ret = crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y, old_fb);
541 if (ret) {
542 spin_lock_irqsave(&dev->event_lock, flags);
543 if (gma_crtc->page_flip_event) {
544 gma_crtc->page_flip_event = NULL;
545 drm_crtc_vblank_put(crtc);
546 }
547 spin_unlock_irqrestore(&dev->event_lock, flags);
548 }
549 } else {
550 ret = crtc_funcs->mode_set_base(crtc, crtc->x, crtc->y, old_fb);
551 }
552
553 /* Restore previous fb in case of failure. */
554 if (ret)
555 crtc->primary->fb = current_fb;
556
557 return ret;
558 }
559
560 const struct drm_crtc_funcs gma_crtc_funcs = {
561 .cursor_set = gma_crtc_cursor_set,
562 .cursor_move = gma_crtc_cursor_move,
563 .gamma_set = gma_crtc_gamma_set,
564 .set_config = drm_crtc_helper_set_config,
565 .destroy = gma_crtc_destroy,
566 .page_flip = gma_crtc_page_flip,
567 .enable_vblank = gma_crtc_enable_vblank,
568 .disable_vblank = gma_crtc_disable_vblank,
569 .get_vblank_counter = gma_crtc_get_vblank_counter,
570 };
571
572 /*
573 * Save HW states of given crtc
574 */
gma_crtc_save(struct drm_crtc * crtc)575 void gma_crtc_save(struct drm_crtc *crtc)
576 {
577 struct drm_device *dev = crtc->dev;
578 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
579 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
580 struct psb_intel_crtc_state *crtc_state = gma_crtc->crtc_state;
581 const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
582 uint32_t palette_reg;
583 int i;
584
585 if (!crtc_state) {
586 dev_err(dev->dev, "No CRTC state found\n");
587 return;
588 }
589
590 crtc_state->saveDSPCNTR = REG_READ(map->cntr);
591 crtc_state->savePIPECONF = REG_READ(map->conf);
592 crtc_state->savePIPESRC = REG_READ(map->src);
593 crtc_state->saveFP0 = REG_READ(map->fp0);
594 crtc_state->saveFP1 = REG_READ(map->fp1);
595 crtc_state->saveDPLL = REG_READ(map->dpll);
596 crtc_state->saveHTOTAL = REG_READ(map->htotal);
597 crtc_state->saveHBLANK = REG_READ(map->hblank);
598 crtc_state->saveHSYNC = REG_READ(map->hsync);
599 crtc_state->saveVTOTAL = REG_READ(map->vtotal);
600 crtc_state->saveVBLANK = REG_READ(map->vblank);
601 crtc_state->saveVSYNC = REG_READ(map->vsync);
602 crtc_state->saveDSPSTRIDE = REG_READ(map->stride);
603
604 /* NOTE: DSPSIZE DSPPOS only for psb */
605 crtc_state->saveDSPSIZE = REG_READ(map->size);
606 crtc_state->saveDSPPOS = REG_READ(map->pos);
607
608 crtc_state->saveDSPBASE = REG_READ(map->base);
609
610 palette_reg = map->palette;
611 for (i = 0; i < 256; ++i)
612 crtc_state->savePalette[i] = REG_READ(palette_reg + (i << 2));
613 }
614
615 /*
616 * Restore HW states of given crtc
617 */
gma_crtc_restore(struct drm_crtc * crtc)618 void gma_crtc_restore(struct drm_crtc *crtc)
619 {
620 struct drm_device *dev = crtc->dev;
621 struct drm_psb_private *dev_priv = to_drm_psb_private(dev);
622 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
623 struct psb_intel_crtc_state *crtc_state = gma_crtc->crtc_state;
624 const struct psb_offset *map = &dev_priv->regmap[gma_crtc->pipe];
625 uint32_t palette_reg;
626 int i;
627
628 if (!crtc_state) {
629 dev_err(dev->dev, "No crtc state\n");
630 return;
631 }
632
633 if (crtc_state->saveDPLL & DPLL_VCO_ENABLE) {
634 REG_WRITE(map->dpll,
635 crtc_state->saveDPLL & ~DPLL_VCO_ENABLE);
636 REG_READ(map->dpll);
637 udelay(150);
638 }
639
640 REG_WRITE(map->fp0, crtc_state->saveFP0);
641 REG_READ(map->fp0);
642
643 REG_WRITE(map->fp1, crtc_state->saveFP1);
644 REG_READ(map->fp1);
645
646 REG_WRITE(map->dpll, crtc_state->saveDPLL);
647 REG_READ(map->dpll);
648 udelay(150);
649
650 REG_WRITE(map->htotal, crtc_state->saveHTOTAL);
651 REG_WRITE(map->hblank, crtc_state->saveHBLANK);
652 REG_WRITE(map->hsync, crtc_state->saveHSYNC);
653 REG_WRITE(map->vtotal, crtc_state->saveVTOTAL);
654 REG_WRITE(map->vblank, crtc_state->saveVBLANK);
655 REG_WRITE(map->vsync, crtc_state->saveVSYNC);
656 REG_WRITE(map->stride, crtc_state->saveDSPSTRIDE);
657
658 REG_WRITE(map->size, crtc_state->saveDSPSIZE);
659 REG_WRITE(map->pos, crtc_state->saveDSPPOS);
660
661 REG_WRITE(map->src, crtc_state->savePIPESRC);
662 REG_WRITE(map->base, crtc_state->saveDSPBASE);
663 REG_WRITE(map->conf, crtc_state->savePIPECONF);
664
665 gma_wait_for_vblank(dev);
666
667 REG_WRITE(map->cntr, crtc_state->saveDSPCNTR);
668 REG_WRITE(map->base, crtc_state->saveDSPBASE);
669
670 gma_wait_for_vblank(dev);
671
672 palette_reg = map->palette;
673 for (i = 0; i < 256; ++i)
674 REG_WRITE(palette_reg + (i << 2), crtc_state->savePalette[i]);
675 }
676
gma_encoder_prepare(struct drm_encoder * encoder)677 void gma_encoder_prepare(struct drm_encoder *encoder)
678 {
679 const struct drm_encoder_helper_funcs *encoder_funcs =
680 encoder->helper_private;
681 /* lvds has its own version of prepare see psb_intel_lvds_prepare */
682 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
683 }
684
gma_encoder_commit(struct drm_encoder * encoder)685 void gma_encoder_commit(struct drm_encoder *encoder)
686 {
687 const struct drm_encoder_helper_funcs *encoder_funcs =
688 encoder->helper_private;
689 /* lvds has its own version of commit see psb_intel_lvds_commit */
690 encoder_funcs->dpms(encoder, DRM_MODE_DPMS_ON);
691 }
692
gma_encoder_destroy(struct drm_encoder * encoder)693 void gma_encoder_destroy(struct drm_encoder *encoder)
694 {
695 struct gma_encoder *intel_encoder = to_gma_encoder(encoder);
696
697 drm_encoder_cleanup(encoder);
698 kfree(intel_encoder);
699 }
700
701 /* Currently there is only a 1:1 mapping of encoders and connectors */
gma_best_encoder(struct drm_connector * connector)702 struct drm_encoder *gma_best_encoder(struct drm_connector *connector)
703 {
704 struct gma_encoder *gma_encoder = gma_attached_encoder(connector);
705
706 return &gma_encoder->base;
707 }
708
gma_connector_attach_encoder(struct gma_connector * connector,struct gma_encoder * encoder)709 void gma_connector_attach_encoder(struct gma_connector *connector,
710 struct gma_encoder *encoder)
711 {
712 connector->encoder = encoder;
713 drm_connector_attach_encoder(&connector->base,
714 &encoder->base);
715 }
716
717 #define GMA_PLL_INVALID(s) { /* DRM_ERROR(s); */ return false; }
718
gma_pll_is_valid(struct drm_crtc * crtc,const struct gma_limit_t * limit,struct gma_clock_t * clock)719 bool gma_pll_is_valid(struct drm_crtc *crtc,
720 const struct gma_limit_t *limit,
721 struct gma_clock_t *clock)
722 {
723 if (clock->p1 < limit->p1.min || limit->p1.max < clock->p1)
724 GMA_PLL_INVALID("p1 out of range");
725 if (clock->p < limit->p.min || limit->p.max < clock->p)
726 GMA_PLL_INVALID("p out of range");
727 if (clock->m2 < limit->m2.min || limit->m2.max < clock->m2)
728 GMA_PLL_INVALID("m2 out of range");
729 if (clock->m1 < limit->m1.min || limit->m1.max < clock->m1)
730 GMA_PLL_INVALID("m1 out of range");
731 /* On CDV m1 is always 0 */
732 if (clock->m1 <= clock->m2 && clock->m1 != 0)
733 GMA_PLL_INVALID("m1 <= m2 && m1 != 0");
734 if (clock->m < limit->m.min || limit->m.max < clock->m)
735 GMA_PLL_INVALID("m out of range");
736 if (clock->n < limit->n.min || limit->n.max < clock->n)
737 GMA_PLL_INVALID("n out of range");
738 if (clock->vco < limit->vco.min || limit->vco.max < clock->vco)
739 GMA_PLL_INVALID("vco out of range");
740 /* XXX: We may need to be checking "Dot clock"
741 * depending on the multiplier, connector, etc.,
742 * rather than just a single range.
743 */
744 if (clock->dot < limit->dot.min || limit->dot.max < clock->dot)
745 GMA_PLL_INVALID("dot out of range");
746
747 return true;
748 }
749
gma_find_best_pll(const struct gma_limit_t * limit,struct drm_crtc * crtc,int target,int refclk,struct gma_clock_t * best_clock)750 bool gma_find_best_pll(const struct gma_limit_t *limit,
751 struct drm_crtc *crtc, int target, int refclk,
752 struct gma_clock_t *best_clock)
753 {
754 struct drm_device *dev = crtc->dev;
755 const struct gma_clock_funcs *clock_funcs =
756 to_gma_crtc(crtc)->clock_funcs;
757 struct gma_clock_t clock;
758 int err = target;
759
760 if (gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS) &&
761 (REG_READ(LVDS) & LVDS_PORT_EN) != 0) {
762 /*
763 * For LVDS, if the panel is on, just rely on its current
764 * settings for dual-channel. We haven't figured out how to
765 * reliably set up different single/dual channel state, if we
766 * even can.
767 */
768 if ((REG_READ(LVDS) & LVDS_CLKB_POWER_MASK) ==
769 LVDS_CLKB_POWER_UP)
770 clock.p2 = limit->p2.p2_fast;
771 else
772 clock.p2 = limit->p2.p2_slow;
773 } else {
774 if (target < limit->p2.dot_limit)
775 clock.p2 = limit->p2.p2_slow;
776 else
777 clock.p2 = limit->p2.p2_fast;
778 }
779
780 memset(best_clock, 0, sizeof(*best_clock));
781
782 /* m1 is always 0 on CDV so the outmost loop will run just once */
783 for (clock.m1 = limit->m1.min; clock.m1 <= limit->m1.max; clock.m1++) {
784 for (clock.m2 = limit->m2.min;
785 (clock.m2 < clock.m1 || clock.m1 == 0) &&
786 clock.m2 <= limit->m2.max; clock.m2++) {
787 for (clock.n = limit->n.min;
788 clock.n <= limit->n.max; clock.n++) {
789 for (clock.p1 = limit->p1.min;
790 clock.p1 <= limit->p1.max;
791 clock.p1++) {
792 int this_err;
793
794 clock_funcs->clock(refclk, &clock);
795
796 if (!clock_funcs->pll_is_valid(crtc,
797 limit, &clock))
798 continue;
799
800 this_err = abs(clock.dot - target);
801 if (this_err < err) {
802 *best_clock = clock;
803 err = this_err;
804 }
805 }
806 }
807 }
808 }
809
810 return err != target;
811 }
812