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drm/amdkfd: Add memory exception handling
[linux/fpc-iii.git] / drivers / gpu / drm / rockchip / rockchip_drm_vop.c
blob4557f335a8a56f243ad4aa326a1826572116d3a5
1 /*
2 * Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
3 * Author:Mark Yao <mark.yao@rock-chips.com>
4 *
5 * This software is licensed under the terms of the GNU General Public
6 * License version 2, as published by the Free Software Foundation, and
7 * may be copied, distributed, and modified under those terms.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #include <drm/drm.h>
16 #include <drm/drmP.h>
17 #include <drm/drm_crtc.h>
18 #include <drm/drm_crtc_helper.h>
19 #include <drm/drm_plane_helper.h>
20
21 #include <linux/kernel.h>
22 #include <linux/platform_device.h>
23 #include <linux/clk.h>
24 #include <linux/of.h>
25 #include <linux/of_device.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/component.h>
28
29 #include <linux/reset.h>
30 #include <linux/delay.h>
31
32 #include "rockchip_drm_drv.h"
33 #include "rockchip_drm_gem.h"
34 #include "rockchip_drm_fb.h"
35 #include "rockchip_drm_vop.h"
36
37 #define VOP_REG(off, _mask, s) \
38 {.offset = off, \
39 .mask = _mask, \
40 .shift = s,}
41
42 #define __REG_SET_RELAXED(x, off, mask, shift, v) \
43 vop_mask_write_relaxed(x, off, (mask) << shift, (v) << shift)
44 #define __REG_SET_NORMAL(x, off, mask, shift, v) \
45 vop_mask_write(x, off, (mask) << shift, (v) << shift)
46
47 #define REG_SET(x, base, reg, v, mode) \
48 __REG_SET_##mode(x, base + reg.offset, reg.mask, reg.shift, v)
49
50 #define VOP_WIN_SET(x, win, name, v) \
51 REG_SET(x, win->base, win->phy->name, v, RELAXED)
52 #define VOP_CTRL_SET(x, name, v) \
53 REG_SET(x, 0, (x)->data->ctrl->name, v, NORMAL)
54
55 #define VOP_WIN_GET(x, win, name) \
56 vop_read_reg(x, win->base, &win->phy->name)
57
58 #define VOP_WIN_GET_YRGBADDR(vop, win) \
59 vop_readl(vop, win->base + win->phy->yrgb_mst.offset)
60
61 #define to_vop(x) container_of(x, struct vop, crtc)
62 #define to_vop_win(x) container_of(x, struct vop_win, base)
63
64 struct vop_win_state {
65 struct list_head head;
66 struct drm_framebuffer *fb;
67 dma_addr_t yrgb_mst;
68 struct drm_pending_vblank_event *event;
69 };
70
71 struct vop_win {
72 struct drm_plane base;
73 const struct vop_win_data *data;
74 struct vop *vop;
75
76 struct list_head pending;
77 struct vop_win_state *active;
78 };
79
80 struct vop {
81 struct drm_crtc crtc;
82 struct device *dev;
83 struct drm_device *drm_dev;
84 bool is_enabled;
85
86 int connector_type;
87 int connector_out_mode;
88
89 /* mutex vsync_ work */
90 struct mutex vsync_mutex;
91 bool vsync_work_pending;
92 struct completion dsp_hold_completion;
93
94 const struct vop_data *data;
95
96 uint32_t *regsbak;
97 void __iomem *regs;
98
99 /* physical map length of vop register */
100 uint32_t len;
101
102 /* one time only one process allowed to config the register */
103 spinlock_t reg_lock;
104 /* lock vop irq reg */
105 spinlock_t irq_lock;
106
107 unsigned int irq;
108
109 /* vop AHP clk */
110 struct clk *hclk;
111 /* vop dclk */
112 struct clk *dclk;
113 /* vop share memory frequency */
114 struct clk *aclk;
115
116 /* vop dclk reset */
117 struct reset_control *dclk_rst;
118
119 int pipe;
120
121 struct vop_win win[];
122 };
123
124 enum vop_data_format {
125 VOP_FMT_ARGB8888 = 0,
126 VOP_FMT_RGB888,
127 VOP_FMT_RGB565,
128 VOP_FMT_YUV420SP = 4,
129 VOP_FMT_YUV422SP,
130 VOP_FMT_YUV444SP,
131 };
132
133 struct vop_reg_data {
134 uint32_t offset;
135 uint32_t value;
136 };
137
138 struct vop_reg {
139 uint32_t offset;
140 uint32_t shift;
141 uint32_t mask;
142 };
143
144 struct vop_ctrl {
145 struct vop_reg standby;
146 struct vop_reg data_blank;
147 struct vop_reg gate_en;
148 struct vop_reg mmu_en;
149 struct vop_reg rgb_en;
150 struct vop_reg edp_en;
151 struct vop_reg hdmi_en;
152 struct vop_reg mipi_en;
153 struct vop_reg out_mode;
154 struct vop_reg dither_down;
155 struct vop_reg dither_up;
156 struct vop_reg pin_pol;
157
158 struct vop_reg htotal_pw;
159 struct vop_reg hact_st_end;
160 struct vop_reg vtotal_pw;
161 struct vop_reg vact_st_end;
162 struct vop_reg hpost_st_end;
163 struct vop_reg vpost_st_end;
164 };
165
166 struct vop_win_phy {
167 const uint32_t *data_formats;
168 uint32_t nformats;
169
170 struct vop_reg enable;
171 struct vop_reg format;
172 struct vop_reg act_info;
173 struct vop_reg dsp_info;
174 struct vop_reg dsp_st;
175 struct vop_reg yrgb_mst;
176 struct vop_reg uv_mst;
177 struct vop_reg yrgb_vir;
178 struct vop_reg uv_vir;
179
180 struct vop_reg dst_alpha_ctl;
181 struct vop_reg src_alpha_ctl;
182 };
183
184 struct vop_win_data {
185 uint32_t base;
186 const struct vop_win_phy *phy;
187 enum drm_plane_type type;
188 };
189
190 struct vop_data {
191 const struct vop_reg_data *init_table;
192 unsigned int table_size;
193 const struct vop_ctrl *ctrl;
194 const struct vop_win_data *win;
195 unsigned int win_size;
196 };
197
198 static const uint32_t formats_01[] = {
199 DRM_FORMAT_XRGB8888,
200 DRM_FORMAT_ARGB8888,
201 DRM_FORMAT_RGB888,
202 DRM_FORMAT_RGB565,
203 DRM_FORMAT_NV12,
204 DRM_FORMAT_NV16,
205 DRM_FORMAT_NV24,
206 };
207
208 static const uint32_t formats_234[] = {
209 DRM_FORMAT_XRGB8888,
210 DRM_FORMAT_ARGB8888,
211 DRM_FORMAT_RGB888,
212 DRM_FORMAT_RGB565,
213 };
214
215 static const struct vop_win_phy win01_data = {
216 .data_formats = formats_01,
217 .nformats = ARRAY_SIZE(formats_01),
218 .enable = VOP_REG(WIN0_CTRL0, 0x1, 0),
219 .format = VOP_REG(WIN0_CTRL0, 0x7, 1),
220 .act_info = VOP_REG(WIN0_ACT_INFO, 0x1fff1fff, 0),
221 .dsp_info = VOP_REG(WIN0_DSP_INFO, 0x0fff0fff, 0),
222 .dsp_st = VOP_REG(WIN0_DSP_ST, 0x1fff1fff, 0),
223 .yrgb_mst = VOP_REG(WIN0_YRGB_MST, 0xffffffff, 0),
224 .uv_mst = VOP_REG(WIN0_CBR_MST, 0xffffffff, 0),
225 .yrgb_vir = VOP_REG(WIN0_VIR, 0x3fff, 0),
226 .uv_vir = VOP_REG(WIN0_VIR, 0x3fff, 16),
227 .src_alpha_ctl = VOP_REG(WIN0_SRC_ALPHA_CTRL, 0xff, 0),
228 .dst_alpha_ctl = VOP_REG(WIN0_DST_ALPHA_CTRL, 0xff, 0),
229 };
230
231 static const struct vop_win_phy win23_data = {
232 .data_formats = formats_234,
233 .nformats = ARRAY_SIZE(formats_234),
234 .enable = VOP_REG(WIN2_CTRL0, 0x1, 0),
235 .format = VOP_REG(WIN2_CTRL0, 0x7, 1),
236 .dsp_info = VOP_REG(WIN2_DSP_INFO0, 0x0fff0fff, 0),
237 .dsp_st = VOP_REG(WIN2_DSP_ST0, 0x1fff1fff, 0),
238 .yrgb_mst = VOP_REG(WIN2_MST0, 0xffffffff, 0),
239 .yrgb_vir = VOP_REG(WIN2_VIR0_1, 0x1fff, 0),
240 .src_alpha_ctl = VOP_REG(WIN2_SRC_ALPHA_CTRL, 0xff, 0),
241 .dst_alpha_ctl = VOP_REG(WIN2_DST_ALPHA_CTRL, 0xff, 0),
242 };
243
244 static const struct vop_win_phy cursor_data = {
245 .data_formats = formats_234,
246 .nformats = ARRAY_SIZE(formats_234),
247 .enable = VOP_REG(HWC_CTRL0, 0x1, 0),
248 .format = VOP_REG(HWC_CTRL0, 0x7, 1),
249 .dsp_st = VOP_REG(HWC_DSP_ST, 0x1fff1fff, 0),
250 .yrgb_mst = VOP_REG(HWC_MST, 0xffffffff, 0),
251 };
252
253 static const struct vop_ctrl ctrl_data = {
254 .standby = VOP_REG(SYS_CTRL, 0x1, 22),
255 .gate_en = VOP_REG(SYS_CTRL, 0x1, 23),
256 .mmu_en = VOP_REG(SYS_CTRL, 0x1, 20),
257 .rgb_en = VOP_REG(SYS_CTRL, 0x1, 12),
258 .hdmi_en = VOP_REG(SYS_CTRL, 0x1, 13),
259 .edp_en = VOP_REG(SYS_CTRL, 0x1, 14),
260 .mipi_en = VOP_REG(SYS_CTRL, 0x1, 15),
261 .dither_down = VOP_REG(DSP_CTRL1, 0xf, 1),
262 .dither_up = VOP_REG(DSP_CTRL1, 0x1, 6),
263 .data_blank = VOP_REG(DSP_CTRL0, 0x1, 19),
264 .out_mode = VOP_REG(DSP_CTRL0, 0xf, 0),
265 .pin_pol = VOP_REG(DSP_CTRL0, 0xf, 4),
266 .htotal_pw = VOP_REG(DSP_HTOTAL_HS_END, 0x1fff1fff, 0),
267 .hact_st_end = VOP_REG(DSP_HACT_ST_END, 0x1fff1fff, 0),
268 .vtotal_pw = VOP_REG(DSP_VTOTAL_VS_END, 0x1fff1fff, 0),
269 .vact_st_end = VOP_REG(DSP_VACT_ST_END, 0x1fff1fff, 0),
270 .hpost_st_end = VOP_REG(POST_DSP_HACT_INFO, 0x1fff1fff, 0),
271 .vpost_st_end = VOP_REG(POST_DSP_VACT_INFO, 0x1fff1fff, 0),
272 };
273
274 static const struct vop_reg_data vop_init_reg_table[] = {
275 {SYS_CTRL, 0x00c00000},
276 {DSP_CTRL0, 0x00000000},
277 {WIN0_CTRL0, 0x00000080},
278 {WIN1_CTRL0, 0x00000080},
279 };
280
281 /*
282 * Note: rk3288 has a dedicated 'cursor' window, however, that window requires
283 * special support to get alpha blending working. For now, just use overlay
284 * window 1 for the drm cursor.
285 */
286 static const struct vop_win_data rk3288_vop_win_data[] = {
287 { .base = 0x00, .phy = &win01_data, .type = DRM_PLANE_TYPE_PRIMARY },
288 { .base = 0x40, .phy = &win01_data, .type = DRM_PLANE_TYPE_CURSOR },
289 { .base = 0x00, .phy = &win23_data, .type = DRM_PLANE_TYPE_OVERLAY },
290 { .base = 0x50, .phy = &win23_data, .type = DRM_PLANE_TYPE_OVERLAY },
291 { .base = 0x00, .phy = &cursor_data, .type = DRM_PLANE_TYPE_OVERLAY },
292 };
293
294 static const struct vop_data rk3288_vop = {
295 .init_table = vop_init_reg_table,
296 .table_size = ARRAY_SIZE(vop_init_reg_table),
297 .ctrl = &ctrl_data,
298 .win = rk3288_vop_win_data,
299 .win_size = ARRAY_SIZE(rk3288_vop_win_data),
300 };
301
302 static const struct of_device_id vop_driver_dt_match[] = {
303 { .compatible = "rockchip,rk3288-vop",
304 .data = &rk3288_vop },
305 {},
306 };
307
308 static inline void vop_writel(struct vop *vop, uint32_t offset, uint32_t v)
309 {
310 writel(v, vop->regs + offset);
311 vop->regsbak[offset >> 2] = v;
312 }
313
314 static inline uint32_t vop_readl(struct vop *vop, uint32_t offset)
315 {
316 return readl(vop->regs + offset);
317 }
318
319 static inline uint32_t vop_read_reg(struct vop *vop, uint32_t base,
320 const struct vop_reg *reg)
321 {
322 return (vop_readl(vop, base + reg->offset) >> reg->shift) & reg->mask;
323 }
324
325 static inline void vop_cfg_done(struct vop *vop)
326 {
327 writel(0x01, vop->regs + REG_CFG_DONE);
328 }
329
330 static inline void vop_mask_write(struct vop *vop, uint32_t offset,
331 uint32_t mask, uint32_t v)
332 {
333 if (mask) {
334 uint32_t cached_val = vop->regsbak[offset >> 2];
335
336 cached_val = (cached_val & ~mask) | v;
337 writel(cached_val, vop->regs + offset);
338 vop->regsbak[offset >> 2] = cached_val;
339 }
340 }
341
342 static inline void vop_mask_write_relaxed(struct vop *vop, uint32_t offset,
343 uint32_t mask, uint32_t v)
344 {
345 if (mask) {
346 uint32_t cached_val = vop->regsbak[offset >> 2];
347
348 cached_val = (cached_val & ~mask) | v;
349 writel_relaxed(cached_val, vop->regs + offset);
350 vop->regsbak[offset >> 2] = cached_val;
351 }
352 }
353
354 static enum vop_data_format vop_convert_format(uint32_t format)
355 {
356 switch (format) {
357 case DRM_FORMAT_XRGB8888:
358 case DRM_FORMAT_ARGB8888:
359 return VOP_FMT_ARGB8888;
360 case DRM_FORMAT_RGB888:
361 return VOP_FMT_RGB888;
362 case DRM_FORMAT_RGB565:
363 return VOP_FMT_RGB565;
364 case DRM_FORMAT_NV12:
365 return VOP_FMT_YUV420SP;
366 case DRM_FORMAT_NV16:
367 return VOP_FMT_YUV422SP;
368 case DRM_FORMAT_NV24:
369 return VOP_FMT_YUV444SP;
370 default:
371 DRM_ERROR("unsupport format[%08x]\n", format);
372 return -EINVAL;
373 }
374 }
375
376 static bool is_alpha_support(uint32_t format)
377 {
378 switch (format) {
379 case DRM_FORMAT_ARGB8888:
380 return true;
381 default:
382 return false;
383 }
384 }
385
386 static void vop_dsp_hold_valid_irq_enable(struct vop *vop)
387 {
388 unsigned long flags;
389
390 if (WARN_ON(!vop->is_enabled))
391 return;
392
393 spin_lock_irqsave(&vop->irq_lock, flags);
394
395 vop_mask_write(vop, INTR_CTRL0, DSP_HOLD_VALID_INTR_MASK,
396 DSP_HOLD_VALID_INTR_EN(1));
397
398 spin_unlock_irqrestore(&vop->irq_lock, flags);
399 }
400
401 static void vop_dsp_hold_valid_irq_disable(struct vop *vop)
402 {
403 unsigned long flags;
404
405 if (WARN_ON(!vop->is_enabled))
406 return;
407
408 spin_lock_irqsave(&vop->irq_lock, flags);
409
410 vop_mask_write(vop, INTR_CTRL0, DSP_HOLD_VALID_INTR_MASK,
411 DSP_HOLD_VALID_INTR_EN(0));
412
413 spin_unlock_irqrestore(&vop->irq_lock, flags);
414 }
415
416 static void vop_enable(struct drm_crtc *crtc)
417 {
418 struct vop *vop = to_vop(crtc);
419 int ret;
420
421 if (vop->is_enabled)
422 return;
423
424 ret = pm_runtime_get_sync(vop->dev);
425 if (ret < 0) {
426 dev_err(vop->dev, "failed to get pm runtime: %d\n", ret);
427 return;
428 }
429
430 ret = clk_enable(vop->hclk);
431 if (ret < 0) {
432 dev_err(vop->dev, "failed to enable hclk - %d\n", ret);
433 return;
434 }
435
436 ret = clk_enable(vop->dclk);
437 if (ret < 0) {
438 dev_err(vop->dev, "failed to enable dclk - %d\n", ret);
439 goto err_disable_hclk;
440 }
441
442 ret = clk_enable(vop->aclk);
443 if (ret < 0) {
444 dev_err(vop->dev, "failed to enable aclk - %d\n", ret);
445 goto err_disable_dclk;
446 }
447
448 /*
449 * Slave iommu shares power, irq and clock with vop. It was associated
450 * automatically with this master device via common driver code.
451 * Now that we have enabled the clock we attach it to the shared drm
452 * mapping.
453 */
454 ret = rockchip_drm_dma_attach_device(vop->drm_dev, vop->dev);
455 if (ret) {
456 dev_err(vop->dev, "failed to attach dma mapping, %d\n", ret);
457 goto err_disable_aclk;
458 }
459
460 /*
461 * At here, vop clock & iommu is enable, R/W vop regs would be safe.
462 */
463 vop->is_enabled = true;
464
465 spin_lock(&vop->reg_lock);
466
467 VOP_CTRL_SET(vop, standby, 0);
468
469 spin_unlock(&vop->reg_lock);
470
471 enable_irq(vop->irq);
472
473 drm_vblank_on(vop->drm_dev, vop->pipe);
474
475 return;
476
477 err_disable_aclk:
478 clk_disable(vop->aclk);
479 err_disable_dclk:
480 clk_disable(vop->dclk);
481 err_disable_hclk:
482 clk_disable(vop->hclk);
483 }
484
485 static void vop_disable(struct drm_crtc *crtc)
486 {
487 struct vop *vop = to_vop(crtc);
488
489 if (!vop->is_enabled)
490 return;
491
492 drm_vblank_off(crtc->dev, vop->pipe);
493
494 /*
495 * Vop standby will take effect at end of current frame,
496 * if dsp hold valid irq happen, it means standby complete.
497 *
498 * we must wait standby complete when we want to disable aclk,
499 * if not, memory bus maybe dead.
500 */
501 reinit_completion(&vop->dsp_hold_completion);
502 vop_dsp_hold_valid_irq_enable(vop);
503
504 spin_lock(&vop->reg_lock);
505
506 VOP_CTRL_SET(vop, standby, 1);
507
508 spin_unlock(&vop->reg_lock);
509
510 wait_for_completion(&vop->dsp_hold_completion);
511
512 vop_dsp_hold_valid_irq_disable(vop);
513
514 disable_irq(vop->irq);
515
516 vop->is_enabled = false;
517
518 /*
519 * vop standby complete, so iommu detach is safe.
520 */
521 rockchip_drm_dma_detach_device(vop->drm_dev, vop->dev);
522
523 clk_disable(vop->dclk);
524 clk_disable(vop->aclk);
525 clk_disable(vop->hclk);
526 pm_runtime_put(vop->dev);
527 }
528
529 /*
530 * Caller must hold vsync_mutex.
531 */
532 static struct drm_framebuffer *vop_win_last_pending_fb(struct vop_win *vop_win)
533 {
534 struct vop_win_state *last;
535 struct vop_win_state *active = vop_win->active;
536
537 if (list_empty(&vop_win->pending))
538 return active ? active->fb : NULL;
539
540 last = list_last_entry(&vop_win->pending, struct vop_win_state, head);
541 return last ? last->fb : NULL;
542 }
543
544 /*
545 * Caller must hold vsync_mutex.
546 */
547 static int vop_win_queue_fb(struct vop_win *vop_win,
548 struct drm_framebuffer *fb, dma_addr_t yrgb_mst,
549 struct drm_pending_vblank_event *event)
550 {
551 struct vop_win_state *state;
552
553 state = kzalloc(sizeof(*state), GFP_KERNEL);
554 if (!state)
555 return -ENOMEM;
556
557 state->fb = fb;
558 state->yrgb_mst = yrgb_mst;
559 state->event = event;
560
561 list_add_tail(&state->head, &vop_win->pending);
562
563 return 0;
564 }
565
566 static int vop_update_plane_event(struct drm_plane *plane,
567 struct drm_crtc *crtc,
568 struct drm_framebuffer *fb, int crtc_x,
569 int crtc_y, unsigned int crtc_w,
570 unsigned int crtc_h, uint32_t src_x,
571 uint32_t src_y, uint32_t src_w,
572 uint32_t src_h,
573 struct drm_pending_vblank_event *event)
574 {
575 struct vop_win *vop_win = to_vop_win(plane);
576 const struct vop_win_data *win = vop_win->data;
577 struct vop *vop = to_vop(crtc);
578 struct drm_gem_object *obj;
579 struct rockchip_gem_object *rk_obj;
580 unsigned long offset;
581 unsigned int actual_w;
582 unsigned int actual_h;
583 unsigned int dsp_stx;
584 unsigned int dsp_sty;
585 unsigned int y_vir_stride;
586 dma_addr_t yrgb_mst;
587 enum vop_data_format format;
588 uint32_t val;
589 bool is_alpha;
590 bool visible;
591 int ret;
592 struct drm_rect dest = {
593 .x1 = crtc_x,
594 .y1 = crtc_y,
595 .x2 = crtc_x + crtc_w,
596 .y2 = crtc_y + crtc_h,
597 };
598 struct drm_rect src = {
599 /* 16.16 fixed point */
600 .x1 = src_x,
601 .y1 = src_y,
602 .x2 = src_x + src_w,
603 .y2 = src_y + src_h,
604 };
605 const struct drm_rect clip = {
606 .x2 = crtc->mode.hdisplay,
607 .y2 = crtc->mode.vdisplay,
608 };
609 bool can_position = plane->type != DRM_PLANE_TYPE_PRIMARY;
610
611 ret = drm_plane_helper_check_update(plane, crtc, fb,
612 &src, &dest, &clip,
613 DRM_PLANE_HELPER_NO_SCALING,
614 DRM_PLANE_HELPER_NO_SCALING,
615 can_position, false, &visible);
616 if (ret)
617 return ret;
618
619 if (!visible)
620 return 0;
621
622 is_alpha = is_alpha_support(fb->pixel_format);
623 format = vop_convert_format(fb->pixel_format);
624 if (format < 0)
625 return format;
626
627 obj = rockchip_fb_get_gem_obj(fb, 0);
628 if (!obj) {
629 DRM_ERROR("fail to get rockchip gem object from framebuffer\n");
630 return -EINVAL;
631 }
632
633 rk_obj = to_rockchip_obj(obj);
634
635 actual_w = (src.x2 - src.x1) >> 16;
636 actual_h = (src.y2 - src.y1) >> 16;
637 crtc_x = max(0, crtc_x);
638 crtc_y = max(0, crtc_y);
639
640 dsp_stx = crtc_x + crtc->mode.htotal - crtc->mode.hsync_start;
641 dsp_sty = crtc_y + crtc->mode.vtotal - crtc->mode.vsync_start;
642
643 offset = (src.x1 >> 16) * (fb->bits_per_pixel >> 3);
644 offset += (src.y1 >> 16) * fb->pitches[0];
645 yrgb_mst = rk_obj->dma_addr + offset;
646
647 y_vir_stride = fb->pitches[0] / (fb->bits_per_pixel >> 3);
648
649 /*
650 * If this plane update changes the plane's framebuffer, (or more
651 * precisely, if this update has a different framebuffer than the last
652 * update), enqueue it so we can track when it completes.
653 *
654 * Only when we discover that this update has completed, can we
655 * unreference any previous framebuffers.
656 */
657 mutex_lock(&vop->vsync_mutex);
658 if (fb != vop_win_last_pending_fb(vop_win)) {
659 ret = drm_vblank_get(plane->dev, vop->pipe);
660 if (ret) {
661 DRM_ERROR("failed to get vblank, %d\n", ret);
662 mutex_unlock(&vop->vsync_mutex);
663 return ret;
664 }
665
666 drm_framebuffer_reference(fb);
667
668 ret = vop_win_queue_fb(vop_win, fb, yrgb_mst, event);
669 if (ret) {
670 drm_vblank_put(plane->dev, vop->pipe);
671 mutex_unlock(&vop->vsync_mutex);
672 return ret;
673 }
674
675 vop->vsync_work_pending = true;
676 }
677 mutex_unlock(&vop->vsync_mutex);
678
679 spin_lock(&vop->reg_lock);
680
681 VOP_WIN_SET(vop, win, format, format);
682 VOP_WIN_SET(vop, win, yrgb_vir, y_vir_stride);
683 VOP_WIN_SET(vop, win, yrgb_mst, yrgb_mst);
684 val = (actual_h - 1) << 16;
685 val |= (actual_w - 1) & 0xffff;
686 VOP_WIN_SET(vop, win, act_info, val);
687 VOP_WIN_SET(vop, win, dsp_info, val);
688 val = (dsp_sty - 1) << 16;
689 val |= (dsp_stx - 1) & 0xffff;
690 VOP_WIN_SET(vop, win, dsp_st, val);
691
692 if (is_alpha) {
693 VOP_WIN_SET(vop, win, dst_alpha_ctl,
694 DST_FACTOR_M0(ALPHA_SRC_INVERSE));
695 val = SRC_ALPHA_EN(1) | SRC_COLOR_M0(ALPHA_SRC_PRE_MUL) |
696 SRC_ALPHA_M0(ALPHA_STRAIGHT) |
697 SRC_BLEND_M0(ALPHA_PER_PIX) |
698 SRC_ALPHA_CAL_M0(ALPHA_NO_SATURATION) |
699 SRC_FACTOR_M0(ALPHA_ONE);
700 VOP_WIN_SET(vop, win, src_alpha_ctl, val);
701 } else {
702 VOP_WIN_SET(vop, win, src_alpha_ctl, SRC_ALPHA_EN(0));
703 }
704
705 VOP_WIN_SET(vop, win, enable, 1);
706
707 vop_cfg_done(vop);
708 spin_unlock(&vop->reg_lock);
709
710 return 0;
711 }
712
713 static int vop_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
714 struct drm_framebuffer *fb, int crtc_x, int crtc_y,
715 unsigned int crtc_w, unsigned int crtc_h,
716 uint32_t src_x, uint32_t src_y, uint32_t src_w,
717 uint32_t src_h)
718 {
719 return vop_update_plane_event(plane, crtc, fb, crtc_x, crtc_y, crtc_w,
720 crtc_h, src_x, src_y, src_w, src_h,
721 NULL);
722 }
723
724 static int vop_update_primary_plane(struct drm_crtc *crtc,
725 struct drm_pending_vblank_event *event)
726 {
727 unsigned int crtc_w, crtc_h;
728
729 crtc_w = crtc->primary->fb->width - crtc->x;
730 crtc_h = crtc->primary->fb->height - crtc->y;
731
732 return vop_update_plane_event(crtc->primary, crtc, crtc->primary->fb,
733 0, 0, crtc_w, crtc_h, crtc->x << 16,
734 crtc->y << 16, crtc_w << 16,
735 crtc_h << 16, event);
736 }
737
738 static int vop_disable_plane(struct drm_plane *plane)
739 {
740 struct vop_win *vop_win = to_vop_win(plane);
741 const struct vop_win_data *win = vop_win->data;
742 struct vop *vop;
743 int ret;
744
745 if (!plane->crtc)
746 return 0;
747
748 vop = to_vop(plane->crtc);
749
750 ret = drm_vblank_get(plane->dev, vop->pipe);
751 if (ret) {
752 DRM_ERROR("failed to get vblank, %d\n", ret);
753 return ret;
754 }
755
756 mutex_lock(&vop->vsync_mutex);
757
758 ret = vop_win_queue_fb(vop_win, NULL, 0, NULL);
759 if (ret) {
760 drm_vblank_put(plane->dev, vop->pipe);
761 mutex_unlock(&vop->vsync_mutex);
762 return ret;
763 }
764
765 vop->vsync_work_pending = true;
766 mutex_unlock(&vop->vsync_mutex);
767
768 spin_lock(&vop->reg_lock);
769 VOP_WIN_SET(vop, win, enable, 0);
770 vop_cfg_done(vop);
771 spin_unlock(&vop->reg_lock);
772
773 return 0;
774 }
775
776 static void vop_plane_destroy(struct drm_plane *plane)
777 {
778 vop_disable_plane(plane);
779 drm_plane_cleanup(plane);
780 }
781
782 static const struct drm_plane_funcs vop_plane_funcs = {
783 .update_plane = vop_update_plane,
784 .disable_plane = vop_disable_plane,
785 .destroy = vop_plane_destroy,
786 };
787
788 int rockchip_drm_crtc_mode_config(struct drm_crtc *crtc,
789 int connector_type,
790 int out_mode)
791 {
792 struct vop *vop = to_vop(crtc);
793
794 vop->connector_type = connector_type;
795 vop->connector_out_mode = out_mode;
796
797 return 0;
798 }
799 EXPORT_SYMBOL_GPL(rockchip_drm_crtc_mode_config);
800
801 static int vop_crtc_enable_vblank(struct drm_crtc *crtc)
802 {
803 struct vop *vop = to_vop(crtc);
804 unsigned long flags;
805
806 if (!vop->is_enabled)
807 return -EPERM;
808
809 spin_lock_irqsave(&vop->irq_lock, flags);
810
811 vop_mask_write(vop, INTR_CTRL0, FS_INTR_MASK, FS_INTR_EN(1));
812
813 spin_unlock_irqrestore(&vop->irq_lock, flags);
814
815 return 0;
816 }
817
818 static void vop_crtc_disable_vblank(struct drm_crtc *crtc)
819 {
820 struct vop *vop = to_vop(crtc);
821 unsigned long flags;
822
823 if (!vop->is_enabled)
824 return;
825
826 spin_lock_irqsave(&vop->irq_lock, flags);
827 vop_mask_write(vop, INTR_CTRL0, FS_INTR_MASK, FS_INTR_EN(0));
828 spin_unlock_irqrestore(&vop->irq_lock, flags);
829 }
830
831 static const struct rockchip_crtc_funcs private_crtc_funcs = {
832 .enable_vblank = vop_crtc_enable_vblank,
833 .disable_vblank = vop_crtc_disable_vblank,
834 };
835
836 static void vop_crtc_dpms(struct drm_crtc *crtc, int mode)
837 {
838 DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode);
839
840 switch (mode) {
841 case DRM_MODE_DPMS_ON:
842 vop_enable(crtc);
843 break;
844 case DRM_MODE_DPMS_STANDBY:
845 case DRM_MODE_DPMS_SUSPEND:
846 case DRM_MODE_DPMS_OFF:
847 vop_disable(crtc);
848 break;
849 default:
850 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
851 break;
852 }
853 }
854
855 static void vop_crtc_prepare(struct drm_crtc *crtc)
856 {
857 vop_crtc_dpms(crtc, DRM_MODE_DPMS_ON);
858 }
859
860 static bool vop_crtc_mode_fixup(struct drm_crtc *crtc,
861 const struct drm_display_mode *mode,
862 struct drm_display_mode *adjusted_mode)
863 {
864 if (adjusted_mode->htotal == 0 || adjusted_mode->vtotal == 0)
865 return false;
866
867 return true;
868 }
869
870 static int vop_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
871 struct drm_framebuffer *old_fb)
872 {
873 int ret;
874
875 crtc->x = x;
876 crtc->y = y;
877
878 ret = vop_update_primary_plane(crtc, NULL);
879 if (ret < 0) {
880 DRM_ERROR("fail to update plane\n");
881 return ret;
882 }
883
884 return 0;
885 }
886
887 static int vop_crtc_mode_set(struct drm_crtc *crtc,
888 struct drm_display_mode *mode,
889 struct drm_display_mode *adjusted_mode,
890 int x, int y, struct drm_framebuffer *fb)
891 {
892 struct vop *vop = to_vop(crtc);
893 u16 hsync_len = adjusted_mode->hsync_end - adjusted_mode->hsync_start;
894 u16 hdisplay = adjusted_mode->hdisplay;
895 u16 htotal = adjusted_mode->htotal;
896 u16 hact_st = adjusted_mode->htotal - adjusted_mode->hsync_start;
897 u16 hact_end = hact_st + hdisplay;
898 u16 vdisplay = adjusted_mode->vdisplay;
899 u16 vtotal = adjusted_mode->vtotal;
900 u16 vsync_len = adjusted_mode->vsync_end - adjusted_mode->vsync_start;
901 u16 vact_st = adjusted_mode->vtotal - adjusted_mode->vsync_start;
902 u16 vact_end = vact_st + vdisplay;
903 int ret, ret_clk;
904 uint32_t val;
905
906 /*
907 * disable dclk to stop frame scan, so that we can safe config mode and
908 * enable iommu.
909 */
910 clk_disable(vop->dclk);
911
912 switch (vop->connector_type) {
913 case DRM_MODE_CONNECTOR_LVDS:
914 VOP_CTRL_SET(vop, rgb_en, 1);
915 break;
916 case DRM_MODE_CONNECTOR_eDP:
917 VOP_CTRL_SET(vop, edp_en, 1);
918 break;
919 case DRM_MODE_CONNECTOR_HDMIA:
920 VOP_CTRL_SET(vop, hdmi_en, 1);
921 break;
922 default:
923 DRM_ERROR("unsupport connector_type[%d]\n",
924 vop->connector_type);
925 ret = -EINVAL;
926 goto out;
927 };
928 VOP_CTRL_SET(vop, out_mode, vop->connector_out_mode);
929
930 val = 0x8;
931 val |= (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC) ? 0 : 1;
932 val |= (adjusted_mode->flags & DRM_MODE_FLAG_NVSYNC) ? 0 : (1 << 1);
933 VOP_CTRL_SET(vop, pin_pol, val);
934
935 VOP_CTRL_SET(vop, htotal_pw, (htotal << 16) | hsync_len);
936 val = hact_st << 16;
937 val |= hact_end;
938 VOP_CTRL_SET(vop, hact_st_end, val);
939 VOP_CTRL_SET(vop, hpost_st_end, val);
940
941 VOP_CTRL_SET(vop, vtotal_pw, (vtotal << 16) | vsync_len);
942 val = vact_st << 16;
943 val |= vact_end;
944 VOP_CTRL_SET(vop, vact_st_end, val);
945 VOP_CTRL_SET(vop, vpost_st_end, val);
946
947 ret = vop_crtc_mode_set_base(crtc, x, y, fb);
948 if (ret)
949 goto out;
950
951 /*
952 * reset dclk, take all mode config affect, so the clk would run in
953 * correct frame.
954 */
955 reset_control_assert(vop->dclk_rst);
956 usleep_range(10, 20);
957 reset_control_deassert(vop->dclk_rst);
958
959 clk_set_rate(vop->dclk, adjusted_mode->clock * 1000);
960 out:
961 ret_clk = clk_enable(vop->dclk);
962 if (ret_clk < 0) {
963 dev_err(vop->dev, "failed to enable dclk - %d\n", ret_clk);
964 return ret_clk;
965 }
966
967 return ret;
968 }
969
970 static void vop_crtc_commit(struct drm_crtc *crtc)
971 {
972 }
973
974 static const struct drm_crtc_helper_funcs vop_crtc_helper_funcs = {
975 .dpms = vop_crtc_dpms,
976 .prepare = vop_crtc_prepare,
977 .mode_fixup = vop_crtc_mode_fixup,
978 .mode_set = vop_crtc_mode_set,
979 .mode_set_base = vop_crtc_mode_set_base,
980 .commit = vop_crtc_commit,
981 };
982
983 static int vop_crtc_page_flip(struct drm_crtc *crtc,
984 struct drm_framebuffer *fb,
985 struct drm_pending_vblank_event *event,
986 uint32_t page_flip_flags)
987 {
988 struct vop *vop = to_vop(crtc);
989 struct drm_framebuffer *old_fb = crtc->primary->fb;
990 int ret;
991
992 /* when the page flip is requested, crtc should be on */
993 if (!vop->is_enabled) {
994 DRM_DEBUG("page flip request rejected because crtc is off.\n");
995 return 0;
996 }
997
998 crtc->primary->fb = fb;
999
1000 ret = vop_update_primary_plane(crtc, event);
1001 if (ret)
1002 crtc->primary->fb = old_fb;
1003
1004 return ret;
1005 }
1006
1007 static void vop_win_state_complete(struct vop_win *vop_win,
1008 struct vop_win_state *state)
1009 {
1010 struct vop *vop = vop_win->vop;
1011 struct drm_crtc *crtc = &vop->crtc;
1012 struct drm_device *drm = crtc->dev;
1013 unsigned long flags;
1014
1015 if (state->event) {
1016 spin_lock_irqsave(&drm->event_lock, flags);
1017 drm_send_vblank_event(drm, -1, state->event);
1018 spin_unlock_irqrestore(&drm->event_lock, flags);
1019 }
1020
1021 list_del(&state->head);
1022 drm_vblank_put(crtc->dev, vop->pipe);
1023 }
1024
1025 static void vop_crtc_destroy(struct drm_crtc *crtc)
1026 {
1027 drm_crtc_cleanup(crtc);
1028 }
1029
1030 static const struct drm_crtc_funcs vop_crtc_funcs = {
1031 .set_config = drm_crtc_helper_set_config,
1032 .page_flip = vop_crtc_page_flip,
1033 .destroy = vop_crtc_destroy,
1034 };
1035
1036 static bool vop_win_state_is_active(struct vop_win *vop_win,
1037 struct vop_win_state *state)
1038 {
1039 bool active = false;
1040
1041 if (state->fb) {
1042 dma_addr_t yrgb_mst;
1043
1044 /* check yrgb_mst to tell if pending_fb is now front */
1045 yrgb_mst = VOP_WIN_GET_YRGBADDR(vop_win->vop, vop_win->data);
1046
1047 active = (yrgb_mst == state->yrgb_mst);
1048 } else {
1049 bool enabled;
1050
1051 /* if enable bit is clear, plane is now disabled */
1052 enabled = VOP_WIN_GET(vop_win->vop, vop_win->data, enable);
1053
1054 active = (enabled == 0);
1055 }
1056
1057 return active;
1058 }
1059
1060 static void vop_win_state_destroy(struct vop_win_state *state)
1061 {
1062 struct drm_framebuffer *fb = state->fb;
1063
1064 if (fb)
1065 drm_framebuffer_unreference(fb);
1066
1067 kfree(state);
1068 }
1069
1070 static void vop_win_update_state(struct vop_win *vop_win)
1071 {
1072 struct vop_win_state *state, *n, *new_active = NULL;
1073
1074 /* Check if any pending states are now active */
1075 list_for_each_entry(state, &vop_win->pending, head)
1076 if (vop_win_state_is_active(vop_win, state)) {
1077 new_active = state;
1078 break;
1079 }
1080
1081 if (!new_active)
1082 return;
1083
1084 /*
1085 * Destroy any 'skipped' pending states - states that were queued
1086 * before the newly active state.
1087 */
1088 list_for_each_entry_safe(state, n, &vop_win->pending, head) {
1089 if (state == new_active)
1090 break;
1091 vop_win_state_complete(vop_win, state);
1092 vop_win_state_destroy(state);
1093 }
1094
1095 vop_win_state_complete(vop_win, new_active);
1096
1097 if (vop_win->active)
1098 vop_win_state_destroy(vop_win->active);
1099 vop_win->active = new_active;
1100 }
1101
1102 static bool vop_win_has_pending_state(struct vop_win *vop_win)
1103 {
1104 return !list_empty(&vop_win->pending);
1105 }
1106
1107 static irqreturn_t vop_isr_thread(int irq, void *data)
1108 {
1109 struct vop *vop = data;
1110 const struct vop_data *vop_data = vop->data;
1111 unsigned int i;
1112
1113 mutex_lock(&vop->vsync_mutex);
1114
1115 if (!vop->vsync_work_pending)
1116 goto done;
1117
1118 vop->vsync_work_pending = false;
1119
1120 for (i = 0; i < vop_data->win_size; i++) {
1121 struct vop_win *vop_win = &vop->win[i];
1122
1123 vop_win_update_state(vop_win);
1124 if (vop_win_has_pending_state(vop_win))
1125 vop->vsync_work_pending = true;
1126 }
1127
1128 done:
1129 mutex_unlock(&vop->vsync_mutex);
1130
1131 return IRQ_HANDLED;
1132 }
1133
1134 static irqreturn_t vop_isr(int irq, void *data)
1135 {
1136 struct vop *vop = data;
1137 uint32_t intr0_reg, active_irqs;
1138 unsigned long flags;
1139 int ret = IRQ_NONE;
1140
1141 /*
1142 * INTR_CTRL0 register has interrupt status, enable and clear bits, we
1143 * must hold irq_lock to avoid a race with enable/disable_vblank().
1144 */
1145 spin_lock_irqsave(&vop->irq_lock, flags);
1146 intr0_reg = vop_readl(vop, INTR_CTRL0);
1147 active_irqs = intr0_reg & INTR_MASK;
1148 /* Clear all active interrupt sources */
1149 if (active_irqs)
1150 vop_writel(vop, INTR_CTRL0,
1151 intr0_reg | (active_irqs << INTR_CLR_SHIFT));
1152 spin_unlock_irqrestore(&vop->irq_lock, flags);
1153
1154 /* This is expected for vop iommu irqs, since the irq is shared */
1155 if (!active_irqs)
1156 return IRQ_NONE;
1157
1158 if (active_irqs & DSP_HOLD_VALID_INTR) {
1159 complete(&vop->dsp_hold_completion);
1160 active_irqs &= ~DSP_HOLD_VALID_INTR;
1161 ret = IRQ_HANDLED;
1162 }
1163
1164 if (active_irqs & FS_INTR) {
1165 drm_handle_vblank(vop->drm_dev, vop->pipe);
1166 active_irqs &= ~FS_INTR;
1167 ret = (vop->vsync_work_pending) ? IRQ_WAKE_THREAD : IRQ_HANDLED;
1168 }
1169
1170 /* Unhandled irqs are spurious. */
1171 if (active_irqs)
1172 DRM_ERROR("Unknown VOP IRQs: %#02x\n", active_irqs);
1173
1174 return ret;
1175 }
1176
1177 static int vop_create_crtc(struct vop *vop)
1178 {
1179 const struct vop_data *vop_data = vop->data;
1180 struct device *dev = vop->dev;
1181 struct drm_device *drm_dev = vop->drm_dev;
1182 struct drm_plane *primary = NULL, *cursor = NULL, *plane;
1183 struct drm_crtc *crtc = &vop->crtc;
1184 struct device_node *port;
1185 int ret;
1186 int i;
1187
1188 /*
1189 * Create drm_plane for primary and cursor planes first, since we need
1190 * to pass them to drm_crtc_init_with_planes, which sets the
1191 * "possible_crtcs" to the newly initialized crtc.
1192 */
1193 for (i = 0; i < vop_data->win_size; i++) {
1194 struct vop_win *vop_win = &vop->win[i];
1195 const struct vop_win_data *win_data = vop_win->data;
1196
1197 if (win_data->type != DRM_PLANE_TYPE_PRIMARY &&
1198 win_data->type != DRM_PLANE_TYPE_CURSOR)
1199 continue;
1200
1201 ret = drm_universal_plane_init(vop->drm_dev, &vop_win->base,
1202 0, &vop_plane_funcs,
1203 win_data->phy->data_formats,
1204 win_data->phy->nformats,
1205 win_data->type);
1206 if (ret) {
1207 DRM_ERROR("failed to initialize plane\n");
1208 goto err_cleanup_planes;
1209 }
1210
1211 plane = &vop_win->base;
1212 if (plane->type == DRM_PLANE_TYPE_PRIMARY)
1213 primary = plane;
1214 else if (plane->type == DRM_PLANE_TYPE_CURSOR)
1215 cursor = plane;
1216 }
1217
1218 ret = drm_crtc_init_with_planes(drm_dev, crtc, primary, cursor,
1219 &vop_crtc_funcs);
1220 if (ret)
1221 return ret;
1222
1223 drm_crtc_helper_add(crtc, &vop_crtc_helper_funcs);
1224
1225 /*
1226 * Create drm_planes for overlay windows with possible_crtcs restricted
1227 * to the newly created crtc.
1228 */
1229 for (i = 0; i < vop_data->win_size; i++) {
1230 struct vop_win *vop_win = &vop->win[i];
1231 const struct vop_win_data *win_data = vop_win->data;
1232 unsigned long possible_crtcs = 1 << drm_crtc_index(crtc);
1233
1234 if (win_data->type != DRM_PLANE_TYPE_OVERLAY)
1235 continue;
1236
1237 ret = drm_universal_plane_init(vop->drm_dev, &vop_win->base,
1238 possible_crtcs,
1239 &vop_plane_funcs,
1240 win_data->phy->data_formats,
1241 win_data->phy->nformats,
1242 win_data->type);
1243 if (ret) {
1244 DRM_ERROR("failed to initialize overlay plane\n");
1245 goto err_cleanup_crtc;
1246 }
1247 }
1248
1249 port = of_get_child_by_name(dev->of_node, "port");
1250 if (!port) {
1251 DRM_ERROR("no port node found in %s\n",
1252 dev->of_node->full_name);
1253 goto err_cleanup_crtc;
1254 }
1255
1256 init_completion(&vop->dsp_hold_completion);
1257 crtc->port = port;
1258 vop->pipe = drm_crtc_index(crtc);
1259 rockchip_register_crtc_funcs(drm_dev, &private_crtc_funcs, vop->pipe);
1260
1261 return 0;
1262
1263 err_cleanup_crtc:
1264 drm_crtc_cleanup(crtc);
1265 err_cleanup_planes:
1266 list_for_each_entry(plane, &drm_dev->mode_config.plane_list, head)
1267 drm_plane_cleanup(plane);
1268 return ret;
1269 }
1270
1271 static void vop_destroy_crtc(struct vop *vop)
1272 {
1273 struct drm_crtc *crtc = &vop->crtc;
1274
1275 rockchip_unregister_crtc_funcs(vop->drm_dev, vop->pipe);
1276 of_node_put(crtc->port);
1277 drm_crtc_cleanup(crtc);
1278 }
1279
1280 static int vop_initial(struct vop *vop)
1281 {
1282 const struct vop_data *vop_data = vop->data;
1283 const struct vop_reg_data *init_table = vop_data->init_table;
1284 struct reset_control *ahb_rst;
1285 int i, ret;
1286
1287 vop->hclk = devm_clk_get(vop->dev, "hclk_vop");
1288 if (IS_ERR(vop->hclk)) {
1289 dev_err(vop->dev, "failed to get hclk source\n");
1290 return PTR_ERR(vop->hclk);
1291 }
1292 vop->aclk = devm_clk_get(vop->dev, "aclk_vop");
1293 if (IS_ERR(vop->aclk)) {
1294 dev_err(vop->dev, "failed to get aclk source\n");
1295 return PTR_ERR(vop->aclk);
1296 }
1297 vop->dclk = devm_clk_get(vop->dev, "dclk_vop");
1298 if (IS_ERR(vop->dclk)) {
1299 dev_err(vop->dev, "failed to get dclk source\n");
1300 return PTR_ERR(vop->dclk);
1301 }
1302
1303 ret = clk_prepare(vop->hclk);
1304 if (ret < 0) {
1305 dev_err(vop->dev, "failed to prepare hclk\n");
1306 return ret;
1307 }
1308
1309 ret = clk_prepare(vop->dclk);
1310 if (ret < 0) {
1311 dev_err(vop->dev, "failed to prepare dclk\n");
1312 goto err_unprepare_hclk;
1313 }
1314
1315 ret = clk_prepare(vop->aclk);
1316 if (ret < 0) {
1317 dev_err(vop->dev, "failed to prepare aclk\n");
1318 goto err_unprepare_dclk;
1319 }
1320
1321 /*
1322 * enable hclk, so that we can config vop register.
1323 */
1324 ret = clk_enable(vop->hclk);
1325 if (ret < 0) {
1326 dev_err(vop->dev, "failed to prepare aclk\n");
1327 goto err_unprepare_aclk;
1328 }
1329 /*
1330 * do hclk_reset, reset all vop registers.
1331 */
1332 ahb_rst = devm_reset_control_get(vop->dev, "ahb");
1333 if (IS_ERR(ahb_rst)) {
1334 dev_err(vop->dev, "failed to get ahb reset\n");
1335 ret = PTR_ERR(ahb_rst);
1336 goto err_disable_hclk;
1337 }
1338 reset_control_assert(ahb_rst);
1339 usleep_range(10, 20);
1340 reset_control_deassert(ahb_rst);
1341
1342 memcpy(vop->regsbak, vop->regs, vop->len);
1343
1344 for (i = 0; i < vop_data->table_size; i++)
1345 vop_writel(vop, init_table[i].offset, init_table[i].value);
1346
1347 for (i = 0; i < vop_data->win_size; i++) {
1348 const struct vop_win_data *win = &vop_data->win[i];
1349
1350 VOP_WIN_SET(vop, win, enable, 0);
1351 }
1352
1353 vop_cfg_done(vop);
1354
1355 /*
1356 * do dclk_reset, let all config take affect.
1357 */
1358 vop->dclk_rst = devm_reset_control_get(vop->dev, "dclk");
1359 if (IS_ERR(vop->dclk_rst)) {
1360 dev_err(vop->dev, "failed to get dclk reset\n");
1361 ret = PTR_ERR(vop->dclk_rst);
1362 goto err_unprepare_aclk;
1363 }
1364 reset_control_assert(vop->dclk_rst);
1365 usleep_range(10, 20);
1366 reset_control_deassert(vop->dclk_rst);
1367
1368 clk_disable(vop->hclk);
1369
1370 vop->is_enabled = false;
1371
1372 return 0;
1373
1374 err_disable_hclk:
1375 clk_disable(vop->hclk);
1376 err_unprepare_aclk:
1377 clk_unprepare(vop->aclk);
1378 err_unprepare_dclk:
1379 clk_unprepare(vop->dclk);
1380 err_unprepare_hclk:
1381 clk_unprepare(vop->hclk);
1382 return ret;
1383 }
1384
1385 /*
1386 * Initialize the vop->win array elements.
1387 */
1388 static void vop_win_init(struct vop *vop)
1389 {
1390 const struct vop_data *vop_data = vop->data;
1391 unsigned int i;
1392
1393 for (i = 0; i < vop_data->win_size; i++) {
1394 struct vop_win *vop_win = &vop->win[i];
1395 const struct vop_win_data *win_data = &vop_data->win[i];
1396
1397 vop_win->data = win_data;
1398 vop_win->vop = vop;
1399 INIT_LIST_HEAD(&vop_win->pending);
1400 }
1401 }
1402
1403 static int vop_bind(struct device *dev, struct device *master, void *data)
1404 {
1405 struct platform_device *pdev = to_platform_device(dev);
1406 const struct of_device_id *of_id;
1407 const struct vop_data *vop_data;
1408 struct drm_device *drm_dev = data;
1409 struct vop *vop;
1410 struct resource *res;
1411 size_t alloc_size;
1412 int ret, irq;
1413
1414 of_id = of_match_device(vop_driver_dt_match, dev);
1415 vop_data = of_id->data;
1416 if (!vop_data)
1417 return -ENODEV;
1418
1419 /* Allocate vop struct and its vop_win array */
1420 alloc_size = sizeof(*vop) + sizeof(*vop->win) * vop_data->win_size;
1421 vop = devm_kzalloc(dev, alloc_size, GFP_KERNEL);
1422 if (!vop)
1423 return -ENOMEM;
1424
1425 vop->dev = dev;
1426 vop->data = vop_data;
1427 vop->drm_dev = drm_dev;
1428 dev_set_drvdata(dev, vop);
1429
1430 vop_win_init(vop);
1431
1432 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1433 vop->len = resource_size(res);
1434 vop->regs = devm_ioremap_resource(dev, res);
1435 if (IS_ERR(vop->regs))
1436 return PTR_ERR(vop->regs);
1437
1438 vop->regsbak = devm_kzalloc(dev, vop->len, GFP_KERNEL);
1439 if (!vop->regsbak)
1440 return -ENOMEM;
1441
1442 ret = vop_initial(vop);
1443 if (ret < 0) {
1444 dev_err(&pdev->dev, "cannot initial vop dev - err %d\n", ret);
1445 return ret;
1446 }
1447
1448 irq = platform_get_irq(pdev, 0);
1449 if (irq < 0) {
1450 dev_err(dev, "cannot find irq for vop\n");
1451 return irq;
1452 }
1453 vop->irq = (unsigned int)irq;
1454
1455 spin_lock_init(&vop->reg_lock);
1456 spin_lock_init(&vop->irq_lock);
1457
1458 mutex_init(&vop->vsync_mutex);
1459
1460 ret = devm_request_threaded_irq(dev, vop->irq, vop_isr, vop_isr_thread,
1461 IRQF_SHARED, dev_name(dev), vop);
1462 if (ret)
1463 return ret;
1464
1465 /* IRQ is initially disabled; it gets enabled in power_on */
1466 disable_irq(vop->irq);
1467
1468 ret = vop_create_crtc(vop);
1469 if (ret)
1470 return ret;
1471
1472 pm_runtime_enable(&pdev->dev);
1473 return 0;
1474 }
1475
1476 static void vop_unbind(struct device *dev, struct device *master, void *data)
1477 {
1478 struct vop *vop = dev_get_drvdata(dev);
1479
1480 pm_runtime_disable(dev);
1481 vop_destroy_crtc(vop);
1482 }
1483
1484 static const struct component_ops vop_component_ops = {
1485 .bind = vop_bind,
1486 .unbind = vop_unbind,
1487 };
1488
1489 static int vop_probe(struct platform_device *pdev)
1490 {
1491 struct device *dev = &pdev->dev;
1492
1493 if (!dev->of_node) {
1494 dev_err(dev, "can't find vop devices\n");
1495 return -ENODEV;
1496 }
1497
1498 return component_add(dev, &vop_component_ops);
1499 }
1500
1501 static int vop_remove(struct platform_device *pdev)
1502 {
1503 component_del(&pdev->dev, &vop_component_ops);
1504
1505 return 0;
1506 }
1507
1508 struct platform_driver vop_platform_driver = {
1509 .probe = vop_probe,
1510 .remove = vop_remove,
1511 .driver = {
1512 .name = "rockchip-vop",
1513 .owner = THIS_MODULE,
1514 .of_match_table = of_match_ptr(vop_driver_dt_match),
1515 },
1516 };
1517
1518 module_platform_driver(vop_platform_driver);
1519
1520 MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
1521 MODULE_DESCRIPTION("ROCKCHIP VOP Driver");
1522 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support