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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright © 2009 Intel Corporation
4 */
5
6#include <linux/delay.h>
7#include <linux/i2c.h>
8#include <linux/pm_runtime.h>
9
10#include <drm/drm_fourcc.h>
11
12#include "framebuffer.h"
13#include "gma_display.h"
14#include "power.h"
15#include "psb_drv.h"
16#include "psb_intel_drv.h"
17#include "psb_intel_reg.h"
18
19#define MRST_LIMIT_LVDS_100L 0
20#define MRST_LIMIT_LVDS_83 1
21#define MRST_LIMIT_LVDS_100 2
22#define MRST_LIMIT_SDVO 3
23
24#define MRST_DOT_MIN 19750
25#define MRST_DOT_MAX 120000
26#define MRST_M_MIN_100L 20
27#define MRST_M_MIN_100 10
28#define MRST_M_MIN_83 12
29#define MRST_M_MAX_100L 34
30#define MRST_M_MAX_100 17
31#define MRST_M_MAX_83 20
32#define MRST_P1_MIN 2
33#define MRST_P1_MAX_0 7
34#define MRST_P1_MAX_1 8
35
36static bool mrst_lvds_find_best_pll(const struct gma_limit_t *limit,
37 struct drm_crtc *crtc, int target,
38 int refclk, struct gma_clock_t *best_clock);
39
40static bool mrst_sdvo_find_best_pll(const struct gma_limit_t *limit,
41 struct drm_crtc *crtc, int target,
42 int refclk, struct gma_clock_t *best_clock);
43
44static const struct gma_limit_t mrst_limits[] = {
45 { /* MRST_LIMIT_LVDS_100L */
46 .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
47 .m = {.min = MRST_M_MIN_100L, .max = MRST_M_MAX_100L},
48 .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_1},
49 .find_pll = mrst_lvds_find_best_pll,
50 },
51 { /* MRST_LIMIT_LVDS_83L */
52 .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
53 .m = {.min = MRST_M_MIN_83, .max = MRST_M_MAX_83},
54 .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_0},
55 .find_pll = mrst_lvds_find_best_pll,
56 },
57 { /* MRST_LIMIT_LVDS_100 */
58 .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
59 .m = {.min = MRST_M_MIN_100, .max = MRST_M_MAX_100},
60 .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_1},
61 .find_pll = mrst_lvds_find_best_pll,
62 },
63 { /* MRST_LIMIT_SDVO */
64 .vco = {.min = 1400000, .max = 2800000},
65 .n = {.min = 3, .max = 7},
66 .m = {.min = 80, .max = 137},
67 .p1 = {.min = 1, .max = 2},
68 .p2 = {.dot_limit = 200000, .p2_slow = 10, .p2_fast = 10},
69 .find_pll = mrst_sdvo_find_best_pll,
70 },
71};
72
73#define MRST_M_MIN 10
74static const u32 oaktrail_m_converts[] = {
75 0x2B, 0x15, 0x2A, 0x35, 0x1A, 0x0D, 0x26, 0x33, 0x19, 0x2C,
76 0x36, 0x3B, 0x1D, 0x2E, 0x37, 0x1B, 0x2D, 0x16, 0x0B, 0x25,
77 0x12, 0x09, 0x24, 0x32, 0x39, 0x1c,
78};
79
80static const struct gma_limit_t *mrst_limit(struct drm_crtc *crtc,
81 int refclk)
82{
83 const struct gma_limit_t *limit = NULL;
84 struct drm_device *dev = crtc->dev;
85 struct drm_psb_private *dev_priv = dev->dev_private;
86
87 if (gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)
88 || gma_pipe_has_type(crtc, INTEL_OUTPUT_MIPI)) {
89 switch (dev_priv->core_freq) {
90 case 100:
91 limit = &mrst_limits[MRST_LIMIT_LVDS_100L];
92 break;
93 case 166:
94 limit = &mrst_limits[MRST_LIMIT_LVDS_83];
95 break;
96 case 200:
97 limit = &mrst_limits[MRST_LIMIT_LVDS_100];
98 break;
99 }
100 } else if (gma_pipe_has_type(crtc, INTEL_OUTPUT_SDVO)) {
101 limit = &mrst_limits[MRST_LIMIT_SDVO];
102 } else {
103 limit = NULL;
104 dev_err(dev->dev, "mrst_limit Wrong display type.\n");
105 }
106
107 return limit;
108}
109
110/** Derive the pixel clock for the given refclk and divisors for 8xx chips. */
111static void mrst_lvds_clock(int refclk, struct gma_clock_t *clock)
112{
113 clock->dot = (refclk * clock->m) / (14 * clock->p1);
114}
115
116static void mrst_print_pll(struct gma_clock_t *clock)
117{
118 DRM_DEBUG_DRIVER("dotclock=%d, m=%d, m1=%d, m2=%d, n=%d, p1=%d, p2=%d\n",
119 clock->dot, clock->m, clock->m1, clock->m2, clock->n,
120 clock->p1, clock->p2);
121}
122
123static bool mrst_sdvo_find_best_pll(const struct gma_limit_t *limit,
124 struct drm_crtc *crtc, int target,
125 int refclk, struct gma_clock_t *best_clock)
126{
127 struct gma_clock_t clock;
128 u32 target_vco, actual_freq;
129 s32 freq_error, min_error = 100000;
130
131 memset(best_clock, 0, sizeof(*best_clock));
132
133 for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) {
134 for (clock.n = limit->n.min; clock.n <= limit->n.max;
135 clock.n++) {
136 for (clock.p1 = limit->p1.min;
137 clock.p1 <= limit->p1.max; clock.p1++) {
138 /* p2 value always stored in p2_slow on SDVO */
139 clock.p = clock.p1 * limit->p2.p2_slow;
140 target_vco = target * clock.p;
141
142 /* VCO will increase at this point so break */
143 if (target_vco > limit->vco.max)
144 break;
145
146 if (target_vco < limit->vco.min)
147 continue;
148
149 actual_freq = (refclk * clock.m) /
150 (clock.n * clock.p);
151 freq_error = 10000 -
152 ((target * 10000) / actual_freq);
153
154 if (freq_error < -min_error) {
155 /* freq_error will start to decrease at
156 this point so break */
157 break;
158 }
159
160 if (freq_error < 0)
161 freq_error = -freq_error;
162
163 if (freq_error < min_error) {
164 min_error = freq_error;
165 *best_clock = clock;
166 }
167 }
168 }
169 if (min_error == 0)
170 break;
171 }
172
173 return min_error == 0;
174}
175
176/**
177 * Returns a set of divisors for the desired target clock with the given refclk,
178 * or FALSE. Divisor values are the actual divisors for
179 */
180static bool mrst_lvds_find_best_pll(const struct gma_limit_t *limit,
181 struct drm_crtc *crtc, int target,
182 int refclk, struct gma_clock_t *best_clock)
183{
184 struct gma_clock_t clock;
185 int err = target;
186
187 memset(best_clock, 0, sizeof(*best_clock));
188
189 for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) {
190 for (clock.p1 = limit->p1.min; clock.p1 <= limit->p1.max;
191 clock.p1++) {
192 int this_err;
193
194 mrst_lvds_clock(refclk, &clock);
195
196 this_err = abs(clock.dot - target);
197 if (this_err < err) {
198 *best_clock = clock;
199 err = this_err;
200 }
201 }
202 }
203 return err != target;
204}
205
206/**
207 * Sets the power management mode of the pipe and plane.
208 *
209 * This code should probably grow support for turning the cursor off and back
210 * on appropriately at the same time as we're turning the pipe off/on.
211 */
212static void oaktrail_crtc_dpms(struct drm_crtc *crtc, int mode)
213{
214 struct drm_device *dev = crtc->dev;
215 struct drm_psb_private *dev_priv = dev->dev_private;
216 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
217 int pipe = gma_crtc->pipe;
218 const struct psb_offset *map = &dev_priv->regmap[pipe];
219 u32 temp;
220 int i;
221 int need_aux = gma_pipe_has_type(crtc, INTEL_OUTPUT_SDVO) ? 1 : 0;
222
223 if (gma_pipe_has_type(crtc, INTEL_OUTPUT_HDMI)) {
224 oaktrail_crtc_hdmi_dpms(crtc, mode);
225 return;
226 }
227
228 if (!gma_power_begin(dev, true))
229 return;
230
231 /* XXX: When our outputs are all unaware of DPMS modes other than off
232 * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
233 */
234 switch (mode) {
235 case DRM_MODE_DPMS_ON:
236 case DRM_MODE_DPMS_STANDBY:
237 case DRM_MODE_DPMS_SUSPEND:
238 for (i = 0; i <= need_aux; i++) {
239 /* Enable the DPLL */
240 temp = REG_READ_WITH_AUX(map->dpll, i);
241 if ((temp & DPLL_VCO_ENABLE) == 0) {
242 REG_WRITE_WITH_AUX(map->dpll, temp, i);
243 REG_READ_WITH_AUX(map->dpll, i);
244 /* Wait for the clocks to stabilize. */
245 udelay(150);
246 REG_WRITE_WITH_AUX(map->dpll,
247 temp | DPLL_VCO_ENABLE, i);
248 REG_READ_WITH_AUX(map->dpll, i);
249 /* Wait for the clocks to stabilize. */
250 udelay(150);
251 REG_WRITE_WITH_AUX(map->dpll,
252 temp | DPLL_VCO_ENABLE, i);
253 REG_READ_WITH_AUX(map->dpll, i);
254 /* Wait for the clocks to stabilize. */
255 udelay(150);
256 }
257
258 /* Enable the pipe */
259 temp = REG_READ_WITH_AUX(map->conf, i);
260 if ((temp & PIPEACONF_ENABLE) == 0) {
261 REG_WRITE_WITH_AUX(map->conf,
262 temp | PIPEACONF_ENABLE, i);
263 }
264
265 /* Enable the plane */
266 temp = REG_READ_WITH_AUX(map->cntr, i);
267 if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
268 REG_WRITE_WITH_AUX(map->cntr,
269 temp | DISPLAY_PLANE_ENABLE,
270 i);
271 /* Flush the plane changes */
272 REG_WRITE_WITH_AUX(map->base,
273 REG_READ_WITH_AUX(map->base, i), i);
274 }
275
276 }
277 gma_crtc_load_lut(crtc);
278
279 /* Give the overlay scaler a chance to enable
280 if it's on this pipe */
281 /* psb_intel_crtc_dpms_video(crtc, true); TODO */
282 break;
283 case DRM_MODE_DPMS_OFF:
284 /* Give the overlay scaler a chance to disable
285 * if it's on this pipe */
286 /* psb_intel_crtc_dpms_video(crtc, FALSE); TODO */
287
288 for (i = 0; i <= need_aux; i++) {
289 /* Disable the VGA plane that we never use */
290 REG_WRITE_WITH_AUX(VGACNTRL, VGA_DISP_DISABLE, i);
291 /* Disable display plane */
292 temp = REG_READ_WITH_AUX(map->cntr, i);
293 if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
294 REG_WRITE_WITH_AUX(map->cntr,
295 temp & ~DISPLAY_PLANE_ENABLE, i);
296 /* Flush the plane changes */
297 REG_WRITE_WITH_AUX(map->base,
298 REG_READ(map->base), i);
299 REG_READ_WITH_AUX(map->base, i);
300 }
301
302 /* Next, disable display pipes */
303 temp = REG_READ_WITH_AUX(map->conf, i);
304 if ((temp & PIPEACONF_ENABLE) != 0) {
305 REG_WRITE_WITH_AUX(map->conf,
306 temp & ~PIPEACONF_ENABLE, i);
307 REG_READ_WITH_AUX(map->conf, i);
308 }
309 /* Wait for for the pipe disable to take effect. */
310 gma_wait_for_vblank(dev);
311
312 temp = REG_READ_WITH_AUX(map->dpll, i);
313 if ((temp & DPLL_VCO_ENABLE) != 0) {
314 REG_WRITE_WITH_AUX(map->dpll,
315 temp & ~DPLL_VCO_ENABLE, i);
316 REG_READ_WITH_AUX(map->dpll, i);
317 }
318
319 /* Wait for the clocks to turn off. */
320 udelay(150);
321 }
322 break;
323 }
324
325 /* Set FIFO Watermarks (values taken from EMGD) */
326 REG_WRITE(DSPARB, 0x3f80);
327 REG_WRITE(DSPFW1, 0x3f8f0404);
328 REG_WRITE(DSPFW2, 0x04040f04);
329 REG_WRITE(DSPFW3, 0x0);
330 REG_WRITE(DSPFW4, 0x04040404);
331 REG_WRITE(DSPFW5, 0x04040404);
332 REG_WRITE(DSPFW6, 0x78);
333 REG_WRITE(DSPCHICKENBIT, REG_READ(DSPCHICKENBIT) | 0xc040);
334
335 gma_power_end(dev);
336}
337
338/**
339 * Return the pipe currently connected to the panel fitter,
340 * or -1 if the panel fitter is not present or not in use
341 */
342static int oaktrail_panel_fitter_pipe(struct drm_device *dev)
343{
344 u32 pfit_control;
345
346 pfit_control = REG_READ(PFIT_CONTROL);
347
348 /* See if the panel fitter is in use */
349 if ((pfit_control & PFIT_ENABLE) == 0)
350 return -1;
351 return (pfit_control >> 29) & 3;
352}
353
354static int oaktrail_crtc_mode_set(struct drm_crtc *crtc,
355 struct drm_display_mode *mode,
356 struct drm_display_mode *adjusted_mode,
357 int x, int y,
358 struct drm_framebuffer *old_fb)
359{
360 struct drm_device *dev = crtc->dev;
361 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
362 struct drm_psb_private *dev_priv = dev->dev_private;
363 int pipe = gma_crtc->pipe;
364 const struct psb_offset *map = &dev_priv->regmap[pipe];
365 int refclk = 0;
366 struct gma_clock_t clock;
367 const struct gma_limit_t *limit;
368 u32 dpll = 0, fp = 0, dspcntr, pipeconf;
369 bool ok, is_sdvo = false;
370 bool is_lvds = false;
371 bool is_mipi = false;
372 struct drm_mode_config *mode_config = &dev->mode_config;
373 struct gma_encoder *gma_encoder = NULL;
374 uint64_t scalingType = DRM_MODE_SCALE_FULLSCREEN;
375 struct drm_connector *connector;
376 int i;
377 int need_aux = gma_pipe_has_type(crtc, INTEL_OUTPUT_SDVO) ? 1 : 0;
378
379 if (gma_pipe_has_type(crtc, INTEL_OUTPUT_HDMI))
380 return oaktrail_crtc_hdmi_mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
381
382 if (!gma_power_begin(dev, true))
383 return 0;
384
385 memcpy(&gma_crtc->saved_mode,
386 mode,
387 sizeof(struct drm_display_mode));
388 memcpy(&gma_crtc->saved_adjusted_mode,
389 adjusted_mode,
390 sizeof(struct drm_display_mode));
391
392 list_for_each_entry(connector, &mode_config->connector_list, head) {
393 if (!connector->encoder || connector->encoder->crtc != crtc)
394 continue;
395
396 gma_encoder = gma_attached_encoder(connector);
397
398 switch (gma_encoder->type) {
399 case INTEL_OUTPUT_LVDS:
400 is_lvds = true;
401 break;
402 case INTEL_OUTPUT_SDVO:
403 is_sdvo = true;
404 break;
405 case INTEL_OUTPUT_MIPI:
406 is_mipi = true;
407 break;
408 }
409 }
410
411 /* Disable the VGA plane that we never use */
412 for (i = 0; i <= need_aux; i++)
413 REG_WRITE_WITH_AUX(VGACNTRL, VGA_DISP_DISABLE, i);
414
415 /* Disable the panel fitter if it was on our pipe */
416 if (oaktrail_panel_fitter_pipe(dev) == pipe)
417 REG_WRITE(PFIT_CONTROL, 0);
418
419 for (i = 0; i <= need_aux; i++) {
420 REG_WRITE_WITH_AUX(map->src, ((mode->crtc_hdisplay - 1) << 16) |
421 (mode->crtc_vdisplay - 1), i);
422 }
423
424 if (gma_encoder)
425 drm_object_property_get_value(&connector->base,
426 dev->mode_config.scaling_mode_property, &scalingType);
427
428 if (scalingType == DRM_MODE_SCALE_NO_SCALE) {
429 /* Moorestown doesn't have register support for centering so
430 * we need to mess with the h/vblank and h/vsync start and
431 * ends to get centering */
432 int offsetX = 0, offsetY = 0;
433
434 offsetX = (adjusted_mode->crtc_hdisplay -
435 mode->crtc_hdisplay) / 2;
436 offsetY = (adjusted_mode->crtc_vdisplay -
437 mode->crtc_vdisplay) / 2;
438
439 for (i = 0; i <= need_aux; i++) {
440 REG_WRITE_WITH_AUX(map->htotal, (mode->crtc_hdisplay - 1) |
441 ((adjusted_mode->crtc_htotal - 1) << 16), i);
442 REG_WRITE_WITH_AUX(map->vtotal, (mode->crtc_vdisplay - 1) |
443 ((adjusted_mode->crtc_vtotal - 1) << 16), i);
444 REG_WRITE_WITH_AUX(map->hblank,
445 (adjusted_mode->crtc_hblank_start - offsetX - 1) |
446 ((adjusted_mode->crtc_hblank_end - offsetX - 1) << 16), i);
447 REG_WRITE_WITH_AUX(map->hsync,
448 (adjusted_mode->crtc_hsync_start - offsetX - 1) |
449 ((adjusted_mode->crtc_hsync_end - offsetX - 1) << 16), i);
450 REG_WRITE_WITH_AUX(map->vblank,
451 (adjusted_mode->crtc_vblank_start - offsetY - 1) |
452 ((adjusted_mode->crtc_vblank_end - offsetY - 1) << 16), i);
453 REG_WRITE_WITH_AUX(map->vsync,
454 (adjusted_mode->crtc_vsync_start - offsetY - 1) |
455 ((adjusted_mode->crtc_vsync_end - offsetY - 1) << 16), i);
456 }
457 } else {
458 for (i = 0; i <= need_aux; i++) {
459 REG_WRITE_WITH_AUX(map->htotal, (adjusted_mode->crtc_hdisplay - 1) |
460 ((adjusted_mode->crtc_htotal - 1) << 16), i);
461 REG_WRITE_WITH_AUX(map->vtotal, (adjusted_mode->crtc_vdisplay - 1) |
462 ((adjusted_mode->crtc_vtotal - 1) << 16), i);
463 REG_WRITE_WITH_AUX(map->hblank, (adjusted_mode->crtc_hblank_start - 1) |
464 ((adjusted_mode->crtc_hblank_end - 1) << 16), i);
465 REG_WRITE_WITH_AUX(map->hsync, (adjusted_mode->crtc_hsync_start - 1) |
466 ((adjusted_mode->crtc_hsync_end - 1) << 16), i);
467 REG_WRITE_WITH_AUX(map->vblank, (adjusted_mode->crtc_vblank_start - 1) |
468 ((adjusted_mode->crtc_vblank_end - 1) << 16), i);
469 REG_WRITE_WITH_AUX(map->vsync, (adjusted_mode->crtc_vsync_start - 1) |
470 ((adjusted_mode->crtc_vsync_end - 1) << 16), i);
471 }
472 }
473
474 /* Flush the plane changes */
475 {
476 const struct drm_crtc_helper_funcs *crtc_funcs =
477 crtc->helper_private;
478 crtc_funcs->mode_set_base(crtc, x, y, old_fb);
479 }
480
481 /* setup pipeconf */
482 pipeconf = REG_READ(map->conf);
483
484 /* Set up the display plane register */
485 dspcntr = REG_READ(map->cntr);
486 dspcntr |= DISPPLANE_GAMMA_ENABLE;
487
488 if (pipe == 0)
489 dspcntr |= DISPPLANE_SEL_PIPE_A;
490 else
491 dspcntr |= DISPPLANE_SEL_PIPE_B;
492
493 if (is_mipi)
494 goto oaktrail_crtc_mode_set_exit;
495
496
497 dpll = 0; /*BIT16 = 0 for 100MHz reference */
498
499 refclk = is_sdvo ? 96000 : dev_priv->core_freq * 1000;
500 limit = mrst_limit(crtc, refclk);
501 ok = limit->find_pll(limit, crtc, adjusted_mode->clock,
502 refclk, &clock);
503
504 if (is_sdvo) {
505 /* Convert calculated values to register values */
506 clock.p1 = (1L << (clock.p1 - 1));
507 clock.m -= 2;
508 clock.n = (1L << (clock.n - 1));
509 }
510
511 if (!ok)
512 DRM_ERROR("Failed to find proper PLL settings");
513
514 mrst_print_pll(&clock);
515
516 if (is_sdvo)
517 fp = clock.n << 16 | clock.m;
518 else
519 fp = oaktrail_m_converts[(clock.m - MRST_M_MIN)] << 8;
520
521 dpll |= DPLL_VGA_MODE_DIS;
522
523
524 dpll |= DPLL_VCO_ENABLE;
525
526 if (is_lvds)
527 dpll |= DPLLA_MODE_LVDS;
528 else
529 dpll |= DPLLB_MODE_DAC_SERIAL;
530
531 if (is_sdvo) {
532 int sdvo_pixel_multiply =
533 adjusted_mode->clock / mode->clock;
534
535 dpll |= DPLL_DVO_HIGH_SPEED;
536 dpll |=
537 (sdvo_pixel_multiply -
538 1) << SDVO_MULTIPLIER_SHIFT_HIRES;
539 }
540
541
542 /* compute bitmask from p1 value */
543 if (is_sdvo)
544 dpll |= clock.p1 << 16; // dpll |= (1 << (clock.p1 - 1)) << 16;
545 else
546 dpll |= (1 << (clock.p1 - 2)) << 17;
547
548 dpll |= DPLL_VCO_ENABLE;
549
550 if (dpll & DPLL_VCO_ENABLE) {
551 for (i = 0; i <= need_aux; i++) {
552 REG_WRITE_WITH_AUX(map->fp0, fp, i);
553 REG_WRITE_WITH_AUX(map->dpll, dpll & ~DPLL_VCO_ENABLE, i);
554 REG_READ_WITH_AUX(map->dpll, i);
555 /* Check the DPLLA lock bit PIPEACONF[29] */
556 udelay(150);
557 }
558 }
559
560 for (i = 0; i <= need_aux; i++) {
561 REG_WRITE_WITH_AUX(map->fp0, fp, i);
562 REG_WRITE_WITH_AUX(map->dpll, dpll, i);
563 REG_READ_WITH_AUX(map->dpll, i);
564 /* Wait for the clocks to stabilize. */
565 udelay(150);
566
567 /* write it again -- the BIOS does, after all */
568 REG_WRITE_WITH_AUX(map->dpll, dpll, i);
569 REG_READ_WITH_AUX(map->dpll, i);
570 /* Wait for the clocks to stabilize. */
571 udelay(150);
572
573 REG_WRITE_WITH_AUX(map->conf, pipeconf, i);
574 REG_READ_WITH_AUX(map->conf, i);
575 gma_wait_for_vblank(dev);
576
577 REG_WRITE_WITH_AUX(map->cntr, dspcntr, i);
578 gma_wait_for_vblank(dev);
579 }
580
581oaktrail_crtc_mode_set_exit:
582 gma_power_end(dev);
583 return 0;
584}
585
586static int oaktrail_pipe_set_base(struct drm_crtc *crtc,
587 int x, int y, struct drm_framebuffer *old_fb)
588{
589 struct drm_device *dev = crtc->dev;
590 struct drm_psb_private *dev_priv = dev->dev_private;
591 struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
592 struct drm_framebuffer *fb = crtc->primary->fb;
593 int pipe = gma_crtc->pipe;
594 const struct psb_offset *map = &dev_priv->regmap[pipe];
595 unsigned long start, offset;
596
597 u32 dspcntr;
598 int ret = 0;
599
600 /* no fb bound */
601 if (!fb) {
602 dev_dbg(dev->dev, "No FB bound\n");
603 return 0;
604 }
605
606 if (!gma_power_begin(dev, true))
607 return 0;
608
609 start = to_gtt_range(fb->obj[0])->offset;
610 offset = y * fb->pitches[0] + x * fb->format->cpp[0];
611
612 REG_WRITE(map->stride, fb->pitches[0]);
613
614 dspcntr = REG_READ(map->cntr);
615 dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
616
617 switch (fb->format->cpp[0] * 8) {
618 case 8:
619 dspcntr |= DISPPLANE_8BPP;
620 break;
621 case 16:
622 if (fb->format->depth == 15)
623 dspcntr |= DISPPLANE_15_16BPP;
624 else
625 dspcntr |= DISPPLANE_16BPP;
626 break;
627 case 24:
628 case 32:
629 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
630 break;
631 default:
632 dev_err(dev->dev, "Unknown color depth\n");
633 ret = -EINVAL;
634 goto pipe_set_base_exit;
635 }
636 REG_WRITE(map->cntr, dspcntr);
637
638 REG_WRITE(map->base, offset);
639 REG_READ(map->base);
640 REG_WRITE(map->surf, start);
641 REG_READ(map->surf);
642
643pipe_set_base_exit:
644 gma_power_end(dev);
645 return ret;
646}
647
648const struct drm_crtc_helper_funcs oaktrail_helper_funcs = {
649 .dpms = oaktrail_crtc_dpms,
650 .mode_set = oaktrail_crtc_mode_set,
651 .mode_set_base = oaktrail_pipe_set_base,
652 .prepare = gma_crtc_prepare,
653 .commit = gma_crtc_commit,
654};
655
656/* Not used yet */
657const struct gma_clock_funcs mrst_clock_funcs = {
658 .clock = mrst_lvds_clock,
659 .limit = mrst_limit,
660 .pll_is_valid = gma_pll_is_valid,
661};