]> git.karo-electronics.de Git - karo-tx-linux.git/blob - drivers/gpu/drm/gma500/oaktrail_crtc.c
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[karo-tx-linux.git] / drivers / gpu / drm / gma500 / oaktrail_crtc.c
1 /*
2  * Copyright © 2009 Intel Corporation
3  *
4  * This program is free software; you can redistribute it and/or modify it
5  * under the terms and conditions of the GNU General Public License,
6  * version 2, as published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope it will be useful, but WITHOUT
9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
11  * more details.
12  *
13  * You should have received a copy of the GNU General Public License along with
14  * this program; if not, write to the Free Software Foundation, Inc.,
15  * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
16  */
17
18 #include <linux/i2c.h>
19 #include <linux/pm_runtime.h>
20
21 #include <drm/drmP.h>
22 #include "framebuffer.h"
23 #include "psb_drv.h"
24 #include "psb_intel_drv.h"
25 #include "psb_intel_reg.h"
26 #include "gma_display.h"
27 #include "power.h"
28
29 struct psb_intel_range_t {
30         int min, max;
31 };
32
33 struct oaktrail_limit_t {
34         struct psb_intel_range_t dot, m, p1;
35 };
36
37 struct oaktrail_clock_t {
38         /* derived values */
39         int dot;
40         int m;
41         int p1;
42 };
43
44 #define MRST_LIMIT_LVDS_100L        0
45 #define MRST_LIMIT_LVDS_83          1
46 #define MRST_LIMIT_LVDS_100         2
47
48 #define MRST_DOT_MIN              19750
49 #define MRST_DOT_MAX              120000
50 #define MRST_M_MIN_100L             20
51 #define MRST_M_MIN_100              10
52 #define MRST_M_MIN_83               12
53 #define MRST_M_MAX_100L             34
54 #define MRST_M_MAX_100              17
55 #define MRST_M_MAX_83               20
56 #define MRST_P1_MIN                 2
57 #define MRST_P1_MAX_0               7
58 #define MRST_P1_MAX_1               8
59
60 static const struct oaktrail_limit_t oaktrail_limits[] = {
61         {                       /* MRST_LIMIT_LVDS_100L */
62          .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
63          .m = {.min = MRST_M_MIN_100L, .max = MRST_M_MAX_100L},
64          .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_1},
65          },
66         {                       /* MRST_LIMIT_LVDS_83L */
67          .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
68          .m = {.min = MRST_M_MIN_83, .max = MRST_M_MAX_83},
69          .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_0},
70          },
71         {                       /* MRST_LIMIT_LVDS_100 */
72          .dot = {.min = MRST_DOT_MIN, .max = MRST_DOT_MAX},
73          .m = {.min = MRST_M_MIN_100, .max = MRST_M_MAX_100},
74          .p1 = {.min = MRST_P1_MIN, .max = MRST_P1_MAX_1},
75          },
76 };
77
78 #define MRST_M_MIN          10
79 static const u32 oaktrail_m_converts[] = {
80         0x2B, 0x15, 0x2A, 0x35, 0x1A, 0x0D, 0x26, 0x33, 0x19, 0x2C,
81         0x36, 0x3B, 0x1D, 0x2E, 0x37, 0x1B, 0x2D, 0x16, 0x0B, 0x25,
82         0x12, 0x09, 0x24, 0x32, 0x39, 0x1c,
83 };
84
85 static const struct oaktrail_limit_t *oaktrail_limit(struct drm_crtc *crtc)
86 {
87         const struct oaktrail_limit_t *limit = NULL;
88         struct drm_device *dev = crtc->dev;
89         struct drm_psb_private *dev_priv = dev->dev_private;
90
91         if (gma_pipe_has_type(crtc, INTEL_OUTPUT_LVDS)
92             || gma_pipe_has_type(crtc, INTEL_OUTPUT_MIPI)) {
93                 switch (dev_priv->core_freq) {
94                 case 100:
95                         limit = &oaktrail_limits[MRST_LIMIT_LVDS_100L];
96                         break;
97                 case 166:
98                         limit = &oaktrail_limits[MRST_LIMIT_LVDS_83];
99                         break;
100                 case 200:
101                         limit = &oaktrail_limits[MRST_LIMIT_LVDS_100];
102                         break;
103                 }
104         } else {
105                 limit = NULL;
106                 dev_err(dev->dev, "oaktrail_limit Wrong display type.\n");
107         }
108
109         return limit;
110 }
111
112 /** Derive the pixel clock for the given refclk and divisors for 8xx chips. */
113 static void oaktrail_clock(int refclk, struct oaktrail_clock_t *clock)
114 {
115         clock->dot = (refclk * clock->m) / (14 * clock->p1);
116 }
117
118 static void mrstPrintPll(char *prefix, struct oaktrail_clock_t *clock)
119 {
120         pr_debug("%s: dotclock = %d,  m = %d, p1 = %d.\n",
121              prefix, clock->dot, clock->m, clock->p1);
122 }
123
124 /**
125  * Returns a set of divisors for the desired target clock with the given refclk,
126  * or FALSE.  Divisor values are the actual divisors for
127  */
128 static bool
129 mrstFindBestPLL(struct drm_crtc *crtc, int target, int refclk,
130                 struct oaktrail_clock_t *best_clock)
131 {
132         struct oaktrail_clock_t clock;
133         const struct oaktrail_limit_t *limit = oaktrail_limit(crtc);
134         int err = target;
135
136         memset(best_clock, 0, sizeof(*best_clock));
137
138         for (clock.m = limit->m.min; clock.m <= limit->m.max; clock.m++) {
139                 for (clock.p1 = limit->p1.min; clock.p1 <= limit->p1.max;
140                      clock.p1++) {
141                         int this_err;
142
143                         oaktrail_clock(refclk, &clock);
144
145                         this_err = abs(clock.dot - target);
146                         if (this_err < err) {
147                                 *best_clock = clock;
148                                 err = this_err;
149                         }
150                 }
151         }
152         dev_dbg(crtc->dev->dev, "mrstFindBestPLL err = %d.\n", err);
153         return err != target;
154 }
155
156 /**
157  * Sets the power management mode of the pipe and plane.
158  *
159  * This code should probably grow support for turning the cursor off and back
160  * on appropriately at the same time as we're turning the pipe off/on.
161  */
162 static void oaktrail_crtc_dpms(struct drm_crtc *crtc, int mode)
163 {
164         struct drm_device *dev = crtc->dev;
165         struct drm_psb_private *dev_priv = dev->dev_private;
166         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
167         int pipe = gma_crtc->pipe;
168         const struct psb_offset *map = &dev_priv->regmap[pipe];
169         u32 temp;
170
171         if (pipe == 1) {
172                 oaktrail_crtc_hdmi_dpms(crtc, mode);
173                 return;
174         }
175
176         if (!gma_power_begin(dev, true))
177                 return;
178
179         /* XXX: When our outputs are all unaware of DPMS modes other than off
180          * and on, we should map those modes to DRM_MODE_DPMS_OFF in the CRTC.
181          */
182         switch (mode) {
183         case DRM_MODE_DPMS_ON:
184         case DRM_MODE_DPMS_STANDBY:
185         case DRM_MODE_DPMS_SUSPEND:
186                 /* Enable the DPLL */
187                 temp = REG_READ(map->dpll);
188                 if ((temp & DPLL_VCO_ENABLE) == 0) {
189                         REG_WRITE(map->dpll, temp);
190                         REG_READ(map->dpll);
191                         /* Wait for the clocks to stabilize. */
192                         udelay(150);
193                         REG_WRITE(map->dpll, temp | DPLL_VCO_ENABLE);
194                         REG_READ(map->dpll);
195                         /* Wait for the clocks to stabilize. */
196                         udelay(150);
197                         REG_WRITE(map->dpll, temp | DPLL_VCO_ENABLE);
198                         REG_READ(map->dpll);
199                         /* Wait for the clocks to stabilize. */
200                         udelay(150);
201                 }
202                 /* Enable the pipe */
203                 temp = REG_READ(map->conf);
204                 if ((temp & PIPEACONF_ENABLE) == 0)
205                         REG_WRITE(map->conf, temp | PIPEACONF_ENABLE);
206                 /* Enable the plane */
207                 temp = REG_READ(map->cntr);
208                 if ((temp & DISPLAY_PLANE_ENABLE) == 0) {
209                         REG_WRITE(map->cntr,
210                                   temp | DISPLAY_PLANE_ENABLE);
211                         /* Flush the plane changes */
212                         REG_WRITE(map->base, REG_READ(map->base));
213                 }
214
215                 gma_crtc_load_lut(crtc);
216
217                 /* Give the overlay scaler a chance to enable
218                    if it's on this pipe */
219                 /* psb_intel_crtc_dpms_video(crtc, true); TODO */
220                 break;
221         case DRM_MODE_DPMS_OFF:
222                 /* Give the overlay scaler a chance to disable
223                  * if it's on this pipe */
224                 /* psb_intel_crtc_dpms_video(crtc, FALSE); TODO */
225
226                 /* Disable the VGA plane that we never use */
227                 REG_WRITE(VGACNTRL, VGA_DISP_DISABLE);
228                 /* Disable display plane */
229                 temp = REG_READ(map->cntr);
230                 if ((temp & DISPLAY_PLANE_ENABLE) != 0) {
231                         REG_WRITE(map->cntr,
232                                   temp & ~DISPLAY_PLANE_ENABLE);
233                         /* Flush the plane changes */
234                         REG_WRITE(map->base, REG_READ(map->base));
235                         REG_READ(map->base);
236                 }
237
238                 /* Next, disable display pipes */
239                 temp = REG_READ(map->conf);
240                 if ((temp & PIPEACONF_ENABLE) != 0) {
241                         REG_WRITE(map->conf, temp & ~PIPEACONF_ENABLE);
242                         REG_READ(map->conf);
243                 }
244                 /* Wait for for the pipe disable to take effect. */
245                 gma_wait_for_vblank(dev);
246
247                 temp = REG_READ(map->dpll);
248                 if ((temp & DPLL_VCO_ENABLE) != 0) {
249                         REG_WRITE(map->dpll, temp & ~DPLL_VCO_ENABLE);
250                         REG_READ(map->dpll);
251                 }
252
253                 /* Wait for the clocks to turn off. */
254                 udelay(150);
255                 break;
256         }
257
258         /*Set FIFO Watermarks*/
259         REG_WRITE(DSPARB, 0x3FFF);
260         REG_WRITE(DSPFW1, 0x3F88080A);
261         REG_WRITE(DSPFW2, 0x0b060808);
262         REG_WRITE(DSPFW3, 0x0);
263         REG_WRITE(DSPFW4, 0x08030404);
264         REG_WRITE(DSPFW5, 0x04040404);
265         REG_WRITE(DSPFW6, 0x78);
266         REG_WRITE(0x70400, REG_READ(0x70400) | 0x4000);
267         /* Must write Bit 14 of the Chicken Bit Register */
268
269         gma_power_end(dev);
270 }
271
272 /**
273  * Return the pipe currently connected to the panel fitter,
274  * or -1 if the panel fitter is not present or not in use
275  */
276 static int oaktrail_panel_fitter_pipe(struct drm_device *dev)
277 {
278         u32 pfit_control;
279
280         pfit_control = REG_READ(PFIT_CONTROL);
281
282         /* See if the panel fitter is in use */
283         if ((pfit_control & PFIT_ENABLE) == 0)
284                 return -1;
285         return (pfit_control >> 29) & 3;
286 }
287
288 static int oaktrail_crtc_mode_set(struct drm_crtc *crtc,
289                               struct drm_display_mode *mode,
290                               struct drm_display_mode *adjusted_mode,
291                               int x, int y,
292                               struct drm_framebuffer *old_fb)
293 {
294         struct drm_device *dev = crtc->dev;
295         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
296         struct drm_psb_private *dev_priv = dev->dev_private;
297         int pipe = gma_crtc->pipe;
298         const struct psb_offset *map = &dev_priv->regmap[pipe];
299         int refclk = 0;
300         struct oaktrail_clock_t clock;
301         u32 dpll = 0, fp = 0, dspcntr, pipeconf;
302         bool ok, is_sdvo = false;
303         bool is_lvds = false;
304         bool is_mipi = false;
305         struct drm_mode_config *mode_config = &dev->mode_config;
306         struct gma_encoder *gma_encoder = NULL;
307         uint64_t scalingType = DRM_MODE_SCALE_FULLSCREEN;
308         struct drm_connector *connector;
309
310         if (pipe == 1)
311                 return oaktrail_crtc_hdmi_mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
312
313         if (!gma_power_begin(dev, true))
314                 return 0;
315
316         memcpy(&gma_crtc->saved_mode,
317                 mode,
318                 sizeof(struct drm_display_mode));
319         memcpy(&gma_crtc->saved_adjusted_mode,
320                 adjusted_mode,
321                 sizeof(struct drm_display_mode));
322
323         list_for_each_entry(connector, &mode_config->connector_list, head) {
324                 if (!connector->encoder || connector->encoder->crtc != crtc)
325                         continue;
326
327                 gma_encoder = gma_attached_encoder(connector);
328
329                 switch (gma_encoder->type) {
330                 case INTEL_OUTPUT_LVDS:
331                         is_lvds = true;
332                         break;
333                 case INTEL_OUTPUT_SDVO:
334                         is_sdvo = true;
335                         break;
336                 case INTEL_OUTPUT_MIPI:
337                         is_mipi = true;
338                         break;
339                 }
340         }
341
342         /* Disable the VGA plane that we never use */
343         REG_WRITE(VGACNTRL, VGA_DISP_DISABLE);
344
345         /* Disable the panel fitter if it was on our pipe */
346         if (oaktrail_panel_fitter_pipe(dev) == pipe)
347                 REG_WRITE(PFIT_CONTROL, 0);
348
349         REG_WRITE(map->src,
350                   ((mode->crtc_hdisplay - 1) << 16) |
351                   (mode->crtc_vdisplay - 1));
352
353         if (gma_encoder)
354                 drm_object_property_get_value(&connector->base,
355                         dev->mode_config.scaling_mode_property, &scalingType);
356
357         if (scalingType == DRM_MODE_SCALE_NO_SCALE) {
358                 /* Moorestown doesn't have register support for centering so
359                  * we need to mess with the h/vblank and h/vsync start and
360                  * ends to get centering */
361                 int offsetX = 0, offsetY = 0;
362
363                 offsetX = (adjusted_mode->crtc_hdisplay -
364                            mode->crtc_hdisplay) / 2;
365                 offsetY = (adjusted_mode->crtc_vdisplay -
366                            mode->crtc_vdisplay) / 2;
367
368                 REG_WRITE(map->htotal, (mode->crtc_hdisplay - 1) |
369                         ((adjusted_mode->crtc_htotal - 1) << 16));
370                 REG_WRITE(map->vtotal, (mode->crtc_vdisplay - 1) |
371                         ((adjusted_mode->crtc_vtotal - 1) << 16));
372                 REG_WRITE(map->hblank,
373                         (adjusted_mode->crtc_hblank_start - offsetX - 1) |
374                         ((adjusted_mode->crtc_hblank_end - offsetX - 1) << 16));
375                 REG_WRITE(map->hsync,
376                         (adjusted_mode->crtc_hsync_start - offsetX - 1) |
377                         ((adjusted_mode->crtc_hsync_end - offsetX - 1) << 16));
378                 REG_WRITE(map->vblank,
379                         (adjusted_mode->crtc_vblank_start - offsetY - 1) |
380                         ((adjusted_mode->crtc_vblank_end - offsetY - 1) << 16));
381                 REG_WRITE(map->vsync,
382                         (adjusted_mode->crtc_vsync_start - offsetY - 1) |
383                         ((adjusted_mode->crtc_vsync_end - offsetY - 1) << 16));
384         } else {
385                 REG_WRITE(map->htotal, (adjusted_mode->crtc_hdisplay - 1) |
386                         ((adjusted_mode->crtc_htotal - 1) << 16));
387                 REG_WRITE(map->vtotal, (adjusted_mode->crtc_vdisplay - 1) |
388                         ((adjusted_mode->crtc_vtotal - 1) << 16));
389                 REG_WRITE(map->hblank, (adjusted_mode->crtc_hblank_start - 1) |
390                         ((adjusted_mode->crtc_hblank_end - 1) << 16));
391                 REG_WRITE(map->hsync, (adjusted_mode->crtc_hsync_start - 1) |
392                         ((adjusted_mode->crtc_hsync_end - 1) << 16));
393                 REG_WRITE(map->vblank, (adjusted_mode->crtc_vblank_start - 1) |
394                         ((adjusted_mode->crtc_vblank_end - 1) << 16));
395                 REG_WRITE(map->vsync, (adjusted_mode->crtc_vsync_start - 1) |
396                         ((adjusted_mode->crtc_vsync_end - 1) << 16));
397         }
398
399         /* Flush the plane changes */
400         {
401                 struct drm_crtc_helper_funcs *crtc_funcs =
402                     crtc->helper_private;
403                 crtc_funcs->mode_set_base(crtc, x, y, old_fb);
404         }
405
406         /* setup pipeconf */
407         pipeconf = REG_READ(map->conf);
408
409         /* Set up the display plane register */
410         dspcntr = REG_READ(map->cntr);
411         dspcntr |= DISPPLANE_GAMMA_ENABLE;
412
413         if (pipe == 0)
414                 dspcntr |= DISPPLANE_SEL_PIPE_A;
415         else
416                 dspcntr |= DISPPLANE_SEL_PIPE_B;
417
418         if (is_mipi)
419                 goto oaktrail_crtc_mode_set_exit;
420
421         refclk = dev_priv->core_freq * 1000;
422
423         dpll = 0;               /*BIT16 = 0 for 100MHz reference */
424
425         ok = mrstFindBestPLL(crtc, adjusted_mode->clock, refclk, &clock);
426
427         if (!ok) {
428                 dev_dbg(dev->dev, "mrstFindBestPLL fail in oaktrail_crtc_mode_set.\n");
429         } else {
430                 dev_dbg(dev->dev, "oaktrail_crtc_mode_set pixel clock = %d,"
431                          "m = %x, p1 = %x.\n", clock.dot, clock.m,
432                          clock.p1);
433         }
434
435         fp = oaktrail_m_converts[(clock.m - MRST_M_MIN)] << 8;
436
437         dpll |= DPLL_VGA_MODE_DIS;
438
439
440         dpll |= DPLL_VCO_ENABLE;
441
442         if (is_lvds)
443                 dpll |= DPLLA_MODE_LVDS;
444         else
445                 dpll |= DPLLB_MODE_DAC_SERIAL;
446
447         if (is_sdvo) {
448                 int sdvo_pixel_multiply =
449                     adjusted_mode->clock / mode->clock;
450
451                 dpll |= DPLL_DVO_HIGH_SPEED;
452                 dpll |=
453                     (sdvo_pixel_multiply -
454                      1) << SDVO_MULTIPLIER_SHIFT_HIRES;
455         }
456
457
458         /* compute bitmask from p1 value */
459         dpll |= (1 << (clock.p1 - 2)) << 17;
460
461         dpll |= DPLL_VCO_ENABLE;
462
463         mrstPrintPll("chosen", &clock);
464
465         if (dpll & DPLL_VCO_ENABLE) {
466                 REG_WRITE(map->fp0, fp);
467                 REG_WRITE(map->dpll, dpll & ~DPLL_VCO_ENABLE);
468                 REG_READ(map->dpll);
469                 /* Check the DPLLA lock bit PIPEACONF[29] */
470                 udelay(150);
471         }
472
473         REG_WRITE(map->fp0, fp);
474         REG_WRITE(map->dpll, dpll);
475         REG_READ(map->dpll);
476         /* Wait for the clocks to stabilize. */
477         udelay(150);
478
479         /* write it again -- the BIOS does, after all */
480         REG_WRITE(map->dpll, dpll);
481         REG_READ(map->dpll);
482         /* Wait for the clocks to stabilize. */
483         udelay(150);
484
485         REG_WRITE(map->conf, pipeconf);
486         REG_READ(map->conf);
487         gma_wait_for_vblank(dev);
488
489         REG_WRITE(map->cntr, dspcntr);
490         gma_wait_for_vblank(dev);
491
492 oaktrail_crtc_mode_set_exit:
493         gma_power_end(dev);
494         return 0;
495 }
496
497 static int oaktrail_pipe_set_base(struct drm_crtc *crtc,
498                             int x, int y, struct drm_framebuffer *old_fb)
499 {
500         struct drm_device *dev = crtc->dev;
501         struct drm_psb_private *dev_priv = dev->dev_private;
502         struct gma_crtc *gma_crtc = to_gma_crtc(crtc);
503         struct psb_framebuffer *psbfb = to_psb_fb(crtc->fb);
504         int pipe = gma_crtc->pipe;
505         const struct psb_offset *map = &dev_priv->regmap[pipe];
506         unsigned long start, offset;
507
508         u32 dspcntr;
509         int ret = 0;
510
511         /* no fb bound */
512         if (!crtc->fb) {
513                 dev_dbg(dev->dev, "No FB bound\n");
514                 return 0;
515         }
516
517         if (!gma_power_begin(dev, true))
518                 return 0;
519
520         start = psbfb->gtt->offset;
521         offset = y * crtc->fb->pitches[0] + x * (crtc->fb->bits_per_pixel / 8);
522
523         REG_WRITE(map->stride, crtc->fb->pitches[0]);
524
525         dspcntr = REG_READ(map->cntr);
526         dspcntr &= ~DISPPLANE_PIXFORMAT_MASK;
527
528         switch (crtc->fb->bits_per_pixel) {
529         case 8:
530                 dspcntr |= DISPPLANE_8BPP;
531                 break;
532         case 16:
533                 if (crtc->fb->depth == 15)
534                         dspcntr |= DISPPLANE_15_16BPP;
535                 else
536                         dspcntr |= DISPPLANE_16BPP;
537                 break;
538         case 24:
539         case 32:
540                 dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
541                 break;
542         default:
543                 dev_err(dev->dev, "Unknown color depth\n");
544                 ret = -EINVAL;
545                 goto pipe_set_base_exit;
546         }
547         REG_WRITE(map->cntr, dspcntr);
548
549         REG_WRITE(map->base, offset);
550         REG_READ(map->base);
551         REG_WRITE(map->surf, start);
552         REG_READ(map->surf);
553
554 pipe_set_base_exit:
555         gma_power_end(dev);
556         return ret;
557 }
558
559 const struct drm_crtc_helper_funcs oaktrail_helper_funcs = {
560         .dpms = oaktrail_crtc_dpms,
561         .mode_fixup = gma_crtc_mode_fixup,
562         .mode_set = oaktrail_crtc_mode_set,
563         .mode_set_base = oaktrail_pipe_set_base,
564         .prepare = gma_crtc_prepare,
565         .commit = gma_crtc_commit,
566 };
567