1 /*
2 * Copyright (C) 2012 Avionic Design GmbH
3 * Copyright (C) 2012 NVIDIA CORPORATION. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 */
9
10 #include <linux/clk.h>
11 #include <linux/debugfs.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/platform_device.h>
15 #include <linux/clk/tegra.h>
16
17 #include "host1x_client.h"
18 #include "dc.h"
19 #include "drm.h"
20 #include "gem.h"
21
22 struct tegra_plane {
23 struct drm_plane base;
24 unsigned int index;
25 };
26
to_tegra_plane(struct drm_plane * plane)27 static inline struct tegra_plane *to_tegra_plane(struct drm_plane *plane)
28 {
29 return container_of(plane, struct tegra_plane, base);
30 }
31
tegra_plane_update(struct drm_plane * plane,struct drm_crtc * crtc,struct drm_framebuffer * fb,int crtc_x,int crtc_y,unsigned int crtc_w,unsigned int crtc_h,uint32_t src_x,uint32_t src_y,uint32_t src_w,uint32_t src_h)32 static int tegra_plane_update(struct drm_plane *plane, struct drm_crtc *crtc,
33 struct drm_framebuffer *fb, int crtc_x,
34 int crtc_y, unsigned int crtc_w,
35 unsigned int crtc_h, uint32_t src_x,
36 uint32_t src_y, uint32_t src_w, uint32_t src_h)
37 {
38 struct tegra_plane *p = to_tegra_plane(plane);
39 struct tegra_dc *dc = to_tegra_dc(crtc);
40 struct tegra_dc_window window;
41 unsigned int i;
42
43 memset(&window, 0, sizeof(window));
44 window.src.x = src_x >> 16;
45 window.src.y = src_y >> 16;
46 window.src.w = src_w >> 16;
47 window.src.h = src_h >> 16;
48 window.dst.x = crtc_x;
49 window.dst.y = crtc_y;
50 window.dst.w = crtc_w;
51 window.dst.h = crtc_h;
52 window.format = tegra_dc_format(fb->pixel_format);
53 window.bits_per_pixel = fb->bits_per_pixel;
54
55 for (i = 0; i < drm_format_num_planes(fb->pixel_format); i++) {
56 struct tegra_bo *bo = tegra_fb_get_plane(fb, i);
57
58 window.base[i] = bo->paddr + fb->offsets[i];
59
60 /*
61 * Tegra doesn't support different strides for U and V planes
62 * so we display a warning if the user tries to display a
63 * framebuffer with such a configuration.
64 */
65 if (i >= 2) {
66 if (fb->pitches[i] != window.stride[1])
67 DRM_ERROR("unsupported UV-plane configuration\n");
68 } else {
69 window.stride[i] = fb->pitches[i];
70 }
71 }
72
73 return tegra_dc_setup_window(dc, p->index, &window);
74 }
75
tegra_plane_disable(struct drm_plane * plane)76 static int tegra_plane_disable(struct drm_plane *plane)
77 {
78 struct tegra_dc *dc = to_tegra_dc(plane->crtc);
79 struct tegra_plane *p = to_tegra_plane(plane);
80 unsigned long value;
81
82 value = WINDOW_A_SELECT << p->index;
83 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
84
85 value = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS);
86 value &= ~WIN_ENABLE;
87 tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
88
89 tegra_dc_writel(dc, WIN_A_UPDATE << p->index, DC_CMD_STATE_CONTROL);
90 tegra_dc_writel(dc, WIN_A_ACT_REQ << p->index, DC_CMD_STATE_CONTROL);
91
92 return 0;
93 }
94
tegra_plane_destroy(struct drm_plane * plane)95 static void tegra_plane_destroy(struct drm_plane *plane)
96 {
97 tegra_plane_disable(plane);
98 drm_plane_cleanup(plane);
99 }
100
101 static const struct drm_plane_funcs tegra_plane_funcs = {
102 .update_plane = tegra_plane_update,
103 .disable_plane = tegra_plane_disable,
104 .destroy = tegra_plane_destroy,
105 };
106
107 static const uint32_t plane_formats[] = {
108 DRM_FORMAT_XBGR8888,
109 DRM_FORMAT_XRGB8888,
110 DRM_FORMAT_RGB565,
111 DRM_FORMAT_UYVY,
112 DRM_FORMAT_YUV420,
113 DRM_FORMAT_YUV422,
114 };
115
tegra_dc_add_planes(struct drm_device * drm,struct tegra_dc * dc)116 static int tegra_dc_add_planes(struct drm_device *drm, struct tegra_dc *dc)
117 {
118 unsigned int i;
119 int err = 0;
120
121 for (i = 0; i < 2; i++) {
122 struct tegra_plane *plane;
123
124 plane = devm_kzalloc(drm->dev, sizeof(*plane), GFP_KERNEL);
125 if (!plane)
126 return -ENOMEM;
127
128 plane->index = 1 + i;
129
130 err = drm_plane_init(drm, &plane->base, 1 << dc->pipe,
131 &tegra_plane_funcs, plane_formats,
132 ARRAY_SIZE(plane_formats), false);
133 if (err < 0)
134 return err;
135 }
136
137 return 0;
138 }
139
tegra_dc_set_base(struct tegra_dc * dc,int x,int y,struct drm_framebuffer * fb)140 static int tegra_dc_set_base(struct tegra_dc *dc, int x, int y,
141 struct drm_framebuffer *fb)
142 {
143 struct tegra_bo *bo = tegra_fb_get_plane(fb, 0);
144 unsigned long value;
145
146 tegra_dc_writel(dc, WINDOW_A_SELECT, DC_CMD_DISPLAY_WINDOW_HEADER);
147
148 value = fb->offsets[0] + y * fb->pitches[0] +
149 x * fb->bits_per_pixel / 8;
150
151 tegra_dc_writel(dc, bo->paddr + value, DC_WINBUF_START_ADDR);
152 tegra_dc_writel(dc, fb->pitches[0], DC_WIN_LINE_STRIDE);
153
154 value = GENERAL_UPDATE | WIN_A_UPDATE;
155 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
156
157 value = GENERAL_ACT_REQ | WIN_A_ACT_REQ;
158 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
159
160 return 0;
161 }
162
tegra_dc_enable_vblank(struct tegra_dc * dc)163 void tegra_dc_enable_vblank(struct tegra_dc *dc)
164 {
165 unsigned long value, flags;
166
167 spin_lock_irqsave(&dc->lock, flags);
168
169 value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
170 value |= VBLANK_INT;
171 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
172
173 spin_unlock_irqrestore(&dc->lock, flags);
174 }
175
tegra_dc_disable_vblank(struct tegra_dc * dc)176 void tegra_dc_disable_vblank(struct tegra_dc *dc)
177 {
178 unsigned long value, flags;
179
180 spin_lock_irqsave(&dc->lock, flags);
181
182 value = tegra_dc_readl(dc, DC_CMD_INT_MASK);
183 value &= ~VBLANK_INT;
184 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
185
186 spin_unlock_irqrestore(&dc->lock, flags);
187 }
188
tegra_dc_finish_page_flip(struct tegra_dc * dc)189 static void tegra_dc_finish_page_flip(struct tegra_dc *dc)
190 {
191 struct drm_device *drm = dc->base.dev;
192 struct drm_crtc *crtc = &dc->base;
193 unsigned long flags, base;
194 struct tegra_bo *bo;
195
196 if (!dc->event)
197 return;
198
199 bo = tegra_fb_get_plane(crtc->fb, 0);
200
201 /* check if new start address has been latched */
202 tegra_dc_writel(dc, READ_MUX, DC_CMD_STATE_ACCESS);
203 base = tegra_dc_readl(dc, DC_WINBUF_START_ADDR);
204 tegra_dc_writel(dc, 0, DC_CMD_STATE_ACCESS);
205
206 if (base == bo->paddr + crtc->fb->offsets[0]) {
207 spin_lock_irqsave(&drm->event_lock, flags);
208 drm_send_vblank_event(drm, dc->pipe, dc->event);
209 drm_vblank_put(drm, dc->pipe);
210 dc->event = NULL;
211 spin_unlock_irqrestore(&drm->event_lock, flags);
212 }
213 }
214
tegra_dc_cancel_page_flip(struct drm_crtc * crtc,struct drm_file * file)215 void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file)
216 {
217 struct tegra_dc *dc = to_tegra_dc(crtc);
218 struct drm_device *drm = crtc->dev;
219 unsigned long flags;
220
221 spin_lock_irqsave(&drm->event_lock, flags);
222
223 if (dc->event && dc->event->base.file_priv == file) {
224 dc->event->base.destroy(&dc->event->base);
225 drm_vblank_put(drm, dc->pipe);
226 dc->event = NULL;
227 }
228
229 spin_unlock_irqrestore(&drm->event_lock, flags);
230 }
231
tegra_dc_page_flip(struct drm_crtc * crtc,struct drm_framebuffer * fb,struct drm_pending_vblank_event * event)232 static int tegra_dc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
233 struct drm_pending_vblank_event *event)
234 {
235 struct tegra_dc *dc = to_tegra_dc(crtc);
236 struct drm_device *drm = crtc->dev;
237
238 if (dc->event)
239 return -EBUSY;
240
241 if (event) {
242 event->pipe = dc->pipe;
243 dc->event = event;
244 drm_vblank_get(drm, dc->pipe);
245 }
246
247 tegra_dc_set_base(dc, 0, 0, fb);
248 crtc->fb = fb;
249
250 return 0;
251 }
252
253 static const struct drm_crtc_funcs tegra_crtc_funcs = {
254 .page_flip = tegra_dc_page_flip,
255 .set_config = drm_crtc_helper_set_config,
256 .destroy = drm_crtc_cleanup,
257 };
258
tegra_crtc_disable(struct drm_crtc * crtc)259 static void tegra_crtc_disable(struct drm_crtc *crtc)
260 {
261 struct drm_device *drm = crtc->dev;
262 struct drm_plane *plane;
263
264 list_for_each_entry(plane, &drm->mode_config.plane_list, head) {
265 if (plane->crtc == crtc) {
266 tegra_plane_disable(plane);
267 plane->crtc = NULL;
268
269 if (plane->fb) {
270 drm_framebuffer_unreference(plane->fb);
271 plane->fb = NULL;
272 }
273 }
274 }
275 }
276
tegra_crtc_mode_fixup(struct drm_crtc * crtc,const struct drm_display_mode * mode,struct drm_display_mode * adjusted)277 static bool tegra_crtc_mode_fixup(struct drm_crtc *crtc,
278 const struct drm_display_mode *mode,
279 struct drm_display_mode *adjusted)
280 {
281 return true;
282 }
283
compute_dda_inc(unsigned int in,unsigned int out,bool v,unsigned int bpp)284 static inline u32 compute_dda_inc(unsigned int in, unsigned int out, bool v,
285 unsigned int bpp)
286 {
287 fixed20_12 outf = dfixed_init(out);
288 fixed20_12 inf = dfixed_init(in);
289 u32 dda_inc;
290 int max;
291
292 if (v)
293 max = 15;
294 else {
295 switch (bpp) {
296 case 2:
297 max = 8;
298 break;
299
300 default:
301 WARN_ON_ONCE(1);
302 /* fallthrough */
303 case 4:
304 max = 4;
305 break;
306 }
307 }
308
309 outf.full = max_t(u32, outf.full - dfixed_const(1), dfixed_const(1));
310 inf.full -= dfixed_const(1);
311
312 dda_inc = dfixed_div(inf, outf);
313 dda_inc = min_t(u32, dda_inc, dfixed_const(max));
314
315 return dda_inc;
316 }
317
compute_initial_dda(unsigned int in)318 static inline u32 compute_initial_dda(unsigned int in)
319 {
320 fixed20_12 inf = dfixed_init(in);
321 return dfixed_frac(inf);
322 }
323
tegra_dc_set_timings(struct tegra_dc * dc,struct drm_display_mode * mode)324 static int tegra_dc_set_timings(struct tegra_dc *dc,
325 struct drm_display_mode *mode)
326 {
327 /* TODO: For HDMI compliance, h & v ref_to_sync should be set to 1 */
328 unsigned int h_ref_to_sync = 0;
329 unsigned int v_ref_to_sync = 0;
330 unsigned long value;
331
332 tegra_dc_writel(dc, 0x0, DC_DISP_DISP_TIMING_OPTIONS);
333
334 value = (v_ref_to_sync << 16) | h_ref_to_sync;
335 tegra_dc_writel(dc, value, DC_DISP_REF_TO_SYNC);
336
337 value = ((mode->vsync_end - mode->vsync_start) << 16) |
338 ((mode->hsync_end - mode->hsync_start) << 0);
339 tegra_dc_writel(dc, value, DC_DISP_SYNC_WIDTH);
340
341 value = ((mode->vtotal - mode->vsync_end) << 16) |
342 ((mode->htotal - mode->hsync_end) << 0);
343 tegra_dc_writel(dc, value, DC_DISP_BACK_PORCH);
344
345 value = ((mode->vsync_start - mode->vdisplay) << 16) |
346 ((mode->hsync_start - mode->hdisplay) << 0);
347 tegra_dc_writel(dc, value, DC_DISP_FRONT_PORCH);
348
349 value = (mode->vdisplay << 16) | mode->hdisplay;
350 tegra_dc_writel(dc, value, DC_DISP_ACTIVE);
351
352 return 0;
353 }
354
tegra_crtc_setup_clk(struct drm_crtc * crtc,struct drm_display_mode * mode,unsigned long * div)355 static int tegra_crtc_setup_clk(struct drm_crtc *crtc,
356 struct drm_display_mode *mode,
357 unsigned long *div)
358 {
359 unsigned long pclk = mode->clock * 1000, rate;
360 struct tegra_dc *dc = to_tegra_dc(crtc);
361 struct tegra_output *output = NULL;
362 struct drm_encoder *encoder;
363 long err;
364
365 list_for_each_entry(encoder, &crtc->dev->mode_config.encoder_list, head)
366 if (encoder->crtc == crtc) {
367 output = encoder_to_output(encoder);
368 break;
369 }
370
371 if (!output)
372 return -ENODEV;
373
374 /*
375 * This assumes that the display controller will divide its parent
376 * clock by 2 to generate the pixel clock.
377 */
378 err = tegra_output_setup_clock(output, dc->clk, pclk * 2);
379 if (err < 0) {
380 dev_err(dc->dev, "failed to setup clock: %ld\n", err);
381 return err;
382 }
383
384 rate = clk_get_rate(dc->clk);
385 *div = (rate * 2 / pclk) - 2;
386
387 DRM_DEBUG_KMS("rate: %lu, div: %lu\n", rate, *div);
388
389 return 0;
390 }
391
tegra_dc_format_is_yuv(unsigned int format,bool * planar)392 static bool tegra_dc_format_is_yuv(unsigned int format, bool *planar)
393 {
394 switch (format) {
395 case WIN_COLOR_DEPTH_YCbCr422:
396 case WIN_COLOR_DEPTH_YUV422:
397 if (planar)
398 *planar = false;
399
400 return true;
401
402 case WIN_COLOR_DEPTH_YCbCr420P:
403 case WIN_COLOR_DEPTH_YUV420P:
404 case WIN_COLOR_DEPTH_YCbCr422P:
405 case WIN_COLOR_DEPTH_YUV422P:
406 case WIN_COLOR_DEPTH_YCbCr422R:
407 case WIN_COLOR_DEPTH_YUV422R:
408 case WIN_COLOR_DEPTH_YCbCr422RA:
409 case WIN_COLOR_DEPTH_YUV422RA:
410 if (planar)
411 *planar = true;
412
413 return true;
414 }
415
416 return false;
417 }
418
tegra_dc_setup_window(struct tegra_dc * dc,unsigned int index,const struct tegra_dc_window * window)419 int tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index,
420 const struct tegra_dc_window *window)
421 {
422 unsigned h_offset, v_offset, h_size, v_size, h_dda, v_dda, bpp;
423 unsigned long value;
424 bool yuv, planar;
425
426 /*
427 * For YUV planar modes, the number of bytes per pixel takes into
428 * account only the luma component and therefore is 1.
429 */
430 yuv = tegra_dc_format_is_yuv(window->format, &planar);
431 if (!yuv)
432 bpp = window->bits_per_pixel / 8;
433 else
434 bpp = planar ? 1 : 2;
435
436 value = WINDOW_A_SELECT << index;
437 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_WINDOW_HEADER);
438
439 tegra_dc_writel(dc, window->format, DC_WIN_COLOR_DEPTH);
440 tegra_dc_writel(dc, 0, DC_WIN_BYTE_SWAP);
441
442 value = V_POSITION(window->dst.y) | H_POSITION(window->dst.x);
443 tegra_dc_writel(dc, value, DC_WIN_POSITION);
444
445 value = V_SIZE(window->dst.h) | H_SIZE(window->dst.w);
446 tegra_dc_writel(dc, value, DC_WIN_SIZE);
447
448 h_offset = window->src.x * bpp;
449 v_offset = window->src.y;
450 h_size = window->src.w * bpp;
451 v_size = window->src.h;
452
453 value = V_PRESCALED_SIZE(v_size) | H_PRESCALED_SIZE(h_size);
454 tegra_dc_writel(dc, value, DC_WIN_PRESCALED_SIZE);
455
456 /*
457 * For DDA computations the number of bytes per pixel for YUV planar
458 * modes needs to take into account all Y, U and V components.
459 */
460 if (yuv && planar)
461 bpp = 2;
462
463 h_dda = compute_dda_inc(window->src.w, window->dst.w, false, bpp);
464 v_dda = compute_dda_inc(window->src.h, window->dst.h, true, bpp);
465
466 value = V_DDA_INC(v_dda) | H_DDA_INC(h_dda);
467 tegra_dc_writel(dc, value, DC_WIN_DDA_INC);
468
469 h_dda = compute_initial_dda(window->src.x);
470 v_dda = compute_initial_dda(window->src.y);
471
472 tegra_dc_writel(dc, h_dda, DC_WIN_H_INITIAL_DDA);
473 tegra_dc_writel(dc, v_dda, DC_WIN_V_INITIAL_DDA);
474
475 tegra_dc_writel(dc, 0, DC_WIN_UV_BUF_STRIDE);
476 tegra_dc_writel(dc, 0, DC_WIN_BUF_STRIDE);
477
478 tegra_dc_writel(dc, window->base[0], DC_WINBUF_START_ADDR);
479
480 if (yuv && planar) {
481 tegra_dc_writel(dc, window->base[1], DC_WINBUF_START_ADDR_U);
482 tegra_dc_writel(dc, window->base[2], DC_WINBUF_START_ADDR_V);
483 value = window->stride[1] << 16 | window->stride[0];
484 tegra_dc_writel(dc, value, DC_WIN_LINE_STRIDE);
485 } else {
486 tegra_dc_writel(dc, window->stride[0], DC_WIN_LINE_STRIDE);
487 }
488
489 tegra_dc_writel(dc, h_offset, DC_WINBUF_ADDR_H_OFFSET);
490 tegra_dc_writel(dc, v_offset, DC_WINBUF_ADDR_V_OFFSET);
491
492 value = WIN_ENABLE;
493
494 if (yuv) {
495 /* setup default colorspace conversion coefficients */
496 tegra_dc_writel(dc, 0x00f0, DC_WIN_CSC_YOF);
497 tegra_dc_writel(dc, 0x012a, DC_WIN_CSC_KYRGB);
498 tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KUR);
499 tegra_dc_writel(dc, 0x0198, DC_WIN_CSC_KVR);
500 tegra_dc_writel(dc, 0x039b, DC_WIN_CSC_KUG);
501 tegra_dc_writel(dc, 0x032f, DC_WIN_CSC_KVG);
502 tegra_dc_writel(dc, 0x0204, DC_WIN_CSC_KUB);
503 tegra_dc_writel(dc, 0x0000, DC_WIN_CSC_KVB);
504
505 value |= CSC_ENABLE;
506 } else if (window->bits_per_pixel < 24) {
507 value |= COLOR_EXPAND;
508 }
509
510 tegra_dc_writel(dc, value, DC_WIN_WIN_OPTIONS);
511
512 /*
513 * Disable blending and assume Window A is the bottom-most window,
514 * Window C is the top-most window and Window B is in the middle.
515 */
516 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_NOKEY);
517 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_1WIN);
518
519 switch (index) {
520 case 0:
521 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_X);
522 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y);
523 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY);
524 break;
525
526 case 1:
527 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X);
528 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_2WIN_Y);
529 tegra_dc_writel(dc, 0x000000, DC_WIN_BLEND_3WIN_XY);
530 break;
531
532 case 2:
533 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_X);
534 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_2WIN_Y);
535 tegra_dc_writel(dc, 0xffff00, DC_WIN_BLEND_3WIN_XY);
536 break;
537 }
538
539 tegra_dc_writel(dc, WIN_A_UPDATE << index, DC_CMD_STATE_CONTROL);
540 tegra_dc_writel(dc, WIN_A_ACT_REQ << index, DC_CMD_STATE_CONTROL);
541
542 return 0;
543 }
544
tegra_dc_format(uint32_t format)545 unsigned int tegra_dc_format(uint32_t format)
546 {
547 switch (format) {
548 case DRM_FORMAT_XBGR8888:
549 return WIN_COLOR_DEPTH_R8G8B8A8;
550
551 case DRM_FORMAT_XRGB8888:
552 return WIN_COLOR_DEPTH_B8G8R8A8;
553
554 case DRM_FORMAT_RGB565:
555 return WIN_COLOR_DEPTH_B5G6R5;
556
557 case DRM_FORMAT_UYVY:
558 return WIN_COLOR_DEPTH_YCbCr422;
559
560 case DRM_FORMAT_YUV420:
561 return WIN_COLOR_DEPTH_YCbCr420P;
562
563 case DRM_FORMAT_YUV422:
564 return WIN_COLOR_DEPTH_YCbCr422P;
565
566 default:
567 break;
568 }
569
570 WARN(1, "unsupported pixel format %u, using default\n", format);
571 return WIN_COLOR_DEPTH_B8G8R8A8;
572 }
573
tegra_crtc_mode_set(struct drm_crtc * crtc,struct drm_display_mode * mode,struct drm_display_mode * adjusted,int x,int y,struct drm_framebuffer * old_fb)574 static int tegra_crtc_mode_set(struct drm_crtc *crtc,
575 struct drm_display_mode *mode,
576 struct drm_display_mode *adjusted,
577 int x, int y, struct drm_framebuffer *old_fb)
578 {
579 struct tegra_bo *bo = tegra_fb_get_plane(crtc->fb, 0);
580 struct tegra_dc *dc = to_tegra_dc(crtc);
581 struct tegra_dc_window window;
582 unsigned long div, value;
583 int err;
584
585 drm_vblank_pre_modeset(crtc->dev, dc->pipe);
586
587 err = tegra_crtc_setup_clk(crtc, mode, &div);
588 if (err) {
589 dev_err(dc->dev, "failed to setup clock for CRTC: %d\n", err);
590 return err;
591 }
592
593 /* program display mode */
594 tegra_dc_set_timings(dc, mode);
595
596 value = DE_SELECT_ACTIVE | DE_CONTROL_NORMAL;
597 tegra_dc_writel(dc, value, DC_DISP_DATA_ENABLE_OPTIONS);
598
599 value = tegra_dc_readl(dc, DC_COM_PIN_OUTPUT_POLARITY(1));
600 value &= ~LVS_OUTPUT_POLARITY_LOW;
601 value &= ~LHS_OUTPUT_POLARITY_LOW;
602 tegra_dc_writel(dc, value, DC_COM_PIN_OUTPUT_POLARITY(1));
603
604 value = DISP_DATA_FORMAT_DF1P1C | DISP_ALIGNMENT_MSB |
605 DISP_ORDER_RED_BLUE;
606 tegra_dc_writel(dc, value, DC_DISP_DISP_INTERFACE_CONTROL);
607
608 tegra_dc_writel(dc, 0x00010001, DC_DISP_SHIFT_CLOCK_OPTIONS);
609
610 value = SHIFT_CLK_DIVIDER(div) | PIXEL_CLK_DIVIDER_PCD1;
611 tegra_dc_writel(dc, value, DC_DISP_DISP_CLOCK_CONTROL);
612
613 /* setup window parameters */
614 memset(&window, 0, sizeof(window));
615 window.src.x = 0;
616 window.src.y = 0;
617 window.src.w = mode->hdisplay;
618 window.src.h = mode->vdisplay;
619 window.dst.x = 0;
620 window.dst.y = 0;
621 window.dst.w = mode->hdisplay;
622 window.dst.h = mode->vdisplay;
623 window.format = tegra_dc_format(crtc->fb->pixel_format);
624 window.bits_per_pixel = crtc->fb->bits_per_pixel;
625 window.stride[0] = crtc->fb->pitches[0];
626 window.base[0] = bo->paddr;
627
628 err = tegra_dc_setup_window(dc, 0, &window);
629 if (err < 0)
630 dev_err(dc->dev, "failed to enable root plane\n");
631
632 return 0;
633 }
634
tegra_crtc_mode_set_base(struct drm_crtc * crtc,int x,int y,struct drm_framebuffer * old_fb)635 static int tegra_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
636 struct drm_framebuffer *old_fb)
637 {
638 struct tegra_dc *dc = to_tegra_dc(crtc);
639
640 return tegra_dc_set_base(dc, x, y, crtc->fb);
641 }
642
tegra_crtc_prepare(struct drm_crtc * crtc)643 static void tegra_crtc_prepare(struct drm_crtc *crtc)
644 {
645 struct tegra_dc *dc = to_tegra_dc(crtc);
646 unsigned int syncpt;
647 unsigned long value;
648
649 /* hardware initialization */
650 tegra_periph_reset_deassert(dc->clk);
651 usleep_range(10000, 20000);
652
653 if (dc->pipe)
654 syncpt = SYNCPT_VBLANK1;
655 else
656 syncpt = SYNCPT_VBLANK0;
657
658 /* initialize display controller */
659 tegra_dc_writel(dc, 0x00000100, DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
660 tegra_dc_writel(dc, 0x100 | syncpt, DC_CMD_CONT_SYNCPT_VSYNC);
661
662 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT | WIN_A_OF_INT;
663 tegra_dc_writel(dc, value, DC_CMD_INT_TYPE);
664
665 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT |
666 WIN_A_OF_INT | WIN_B_OF_INT | WIN_C_OF_INT;
667 tegra_dc_writel(dc, value, DC_CMD_INT_POLARITY);
668
669 value = PW0_ENABLE | PW1_ENABLE | PW2_ENABLE | PW3_ENABLE |
670 PW4_ENABLE | PM0_ENABLE | PM1_ENABLE;
671 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_POWER_CONTROL);
672
673 value = tegra_dc_readl(dc, DC_CMD_DISPLAY_COMMAND);
674 value |= DISP_CTRL_MODE_C_DISPLAY;
675 tegra_dc_writel(dc, value, DC_CMD_DISPLAY_COMMAND);
676
677 /* initialize timer */
678 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(0x20) |
679 WINDOW_B_THRESHOLD(0x20) | WINDOW_C_THRESHOLD(0x20);
680 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY);
681
682 value = CURSOR_THRESHOLD(0) | WINDOW_A_THRESHOLD(1) |
683 WINDOW_B_THRESHOLD(1) | WINDOW_C_THRESHOLD(1);
684 tegra_dc_writel(dc, value, DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
685
686 value = VBLANK_INT | WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT;
687 tegra_dc_writel(dc, value, DC_CMD_INT_ENABLE);
688
689 value = WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT;
690 tegra_dc_writel(dc, value, DC_CMD_INT_MASK);
691 }
692
tegra_crtc_commit(struct drm_crtc * crtc)693 static void tegra_crtc_commit(struct drm_crtc *crtc)
694 {
695 struct tegra_dc *dc = to_tegra_dc(crtc);
696 unsigned long value;
697
698 value = GENERAL_UPDATE | WIN_A_UPDATE;
699 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
700
701 value = GENERAL_ACT_REQ | WIN_A_ACT_REQ;
702 tegra_dc_writel(dc, value, DC_CMD_STATE_CONTROL);
703
704 drm_vblank_post_modeset(crtc->dev, dc->pipe);
705 }
706
tegra_crtc_load_lut(struct drm_crtc * crtc)707 static void tegra_crtc_load_lut(struct drm_crtc *crtc)
708 {
709 }
710
711 static const struct drm_crtc_helper_funcs tegra_crtc_helper_funcs = {
712 .disable = tegra_crtc_disable,
713 .mode_fixup = tegra_crtc_mode_fixup,
714 .mode_set = tegra_crtc_mode_set,
715 .mode_set_base = tegra_crtc_mode_set_base,
716 .prepare = tegra_crtc_prepare,
717 .commit = tegra_crtc_commit,
718 .load_lut = tegra_crtc_load_lut,
719 };
720
tegra_dc_irq(int irq,void * data)721 static irqreturn_t tegra_dc_irq(int irq, void *data)
722 {
723 struct tegra_dc *dc = data;
724 unsigned long status;
725
726 status = tegra_dc_readl(dc, DC_CMD_INT_STATUS);
727 tegra_dc_writel(dc, status, DC_CMD_INT_STATUS);
728
729 if (status & FRAME_END_INT) {
730 /*
731 dev_dbg(dc->dev, "%s(): frame end\n", __func__);
732 */
733 }
734
735 if (status & VBLANK_INT) {
736 /*
737 dev_dbg(dc->dev, "%s(): vertical blank\n", __func__);
738 */
739 drm_handle_vblank(dc->base.dev, dc->pipe);
740 tegra_dc_finish_page_flip(dc);
741 }
742
743 if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) {
744 /*
745 dev_dbg(dc->dev, "%s(): underflow\n", __func__);
746 */
747 }
748
749 return IRQ_HANDLED;
750 }
751
tegra_dc_show_regs(struct seq_file * s,void * data)752 static int tegra_dc_show_regs(struct seq_file *s, void *data)
753 {
754 struct drm_info_node *node = s->private;
755 struct tegra_dc *dc = node->info_ent->data;
756
757 #define DUMP_REG(name) \
758 seq_printf(s, "%-40s %#05x %08lx\n", #name, name, \
759 tegra_dc_readl(dc, name))
760
761 DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT);
762 DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_CNTRL);
763 DUMP_REG(DC_CMD_GENERAL_INCR_SYNCPT_ERROR);
764 DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT);
765 DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_CNTRL);
766 DUMP_REG(DC_CMD_WIN_A_INCR_SYNCPT_ERROR);
767 DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT);
768 DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_CNTRL);
769 DUMP_REG(DC_CMD_WIN_B_INCR_SYNCPT_ERROR);
770 DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT);
771 DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_CNTRL);
772 DUMP_REG(DC_CMD_WIN_C_INCR_SYNCPT_ERROR);
773 DUMP_REG(DC_CMD_CONT_SYNCPT_VSYNC);
774 DUMP_REG(DC_CMD_DISPLAY_COMMAND_OPTION0);
775 DUMP_REG(DC_CMD_DISPLAY_COMMAND);
776 DUMP_REG(DC_CMD_SIGNAL_RAISE);
777 DUMP_REG(DC_CMD_DISPLAY_POWER_CONTROL);
778 DUMP_REG(DC_CMD_INT_STATUS);
779 DUMP_REG(DC_CMD_INT_MASK);
780 DUMP_REG(DC_CMD_INT_ENABLE);
781 DUMP_REG(DC_CMD_INT_TYPE);
782 DUMP_REG(DC_CMD_INT_POLARITY);
783 DUMP_REG(DC_CMD_SIGNAL_RAISE1);
784 DUMP_REG(DC_CMD_SIGNAL_RAISE2);
785 DUMP_REG(DC_CMD_SIGNAL_RAISE3);
786 DUMP_REG(DC_CMD_STATE_ACCESS);
787 DUMP_REG(DC_CMD_STATE_CONTROL);
788 DUMP_REG(DC_CMD_DISPLAY_WINDOW_HEADER);
789 DUMP_REG(DC_CMD_REG_ACT_CONTROL);
790 DUMP_REG(DC_COM_CRC_CONTROL);
791 DUMP_REG(DC_COM_CRC_CHECKSUM);
792 DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(0));
793 DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(1));
794 DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(2));
795 DUMP_REG(DC_COM_PIN_OUTPUT_ENABLE(3));
796 DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(0));
797 DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(1));
798 DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(2));
799 DUMP_REG(DC_COM_PIN_OUTPUT_POLARITY(3));
800 DUMP_REG(DC_COM_PIN_OUTPUT_DATA(0));
801 DUMP_REG(DC_COM_PIN_OUTPUT_DATA(1));
802 DUMP_REG(DC_COM_PIN_OUTPUT_DATA(2));
803 DUMP_REG(DC_COM_PIN_OUTPUT_DATA(3));
804 DUMP_REG(DC_COM_PIN_INPUT_ENABLE(0));
805 DUMP_REG(DC_COM_PIN_INPUT_ENABLE(1));
806 DUMP_REG(DC_COM_PIN_INPUT_ENABLE(2));
807 DUMP_REG(DC_COM_PIN_INPUT_ENABLE(3));
808 DUMP_REG(DC_COM_PIN_INPUT_DATA(0));
809 DUMP_REG(DC_COM_PIN_INPUT_DATA(1));
810 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(0));
811 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(1));
812 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(2));
813 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(3));
814 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(4));
815 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(5));
816 DUMP_REG(DC_COM_PIN_OUTPUT_SELECT(6));
817 DUMP_REG(DC_COM_PIN_MISC_CONTROL);
818 DUMP_REG(DC_COM_PIN_PM0_CONTROL);
819 DUMP_REG(DC_COM_PIN_PM0_DUTY_CYCLE);
820 DUMP_REG(DC_COM_PIN_PM1_CONTROL);
821 DUMP_REG(DC_COM_PIN_PM1_DUTY_CYCLE);
822 DUMP_REG(DC_COM_SPI_CONTROL);
823 DUMP_REG(DC_COM_SPI_START_BYTE);
824 DUMP_REG(DC_COM_HSPI_WRITE_DATA_AB);
825 DUMP_REG(DC_COM_HSPI_WRITE_DATA_CD);
826 DUMP_REG(DC_COM_HSPI_CS_DC);
827 DUMP_REG(DC_COM_SCRATCH_REGISTER_A);
828 DUMP_REG(DC_COM_SCRATCH_REGISTER_B);
829 DUMP_REG(DC_COM_GPIO_CTRL);
830 DUMP_REG(DC_COM_GPIO_DEBOUNCE_COUNTER);
831 DUMP_REG(DC_COM_CRC_CHECKSUM_LATCHED);
832 DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS0);
833 DUMP_REG(DC_DISP_DISP_SIGNAL_OPTIONS1);
834 DUMP_REG(DC_DISP_DISP_WIN_OPTIONS);
835 DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY);
836 DUMP_REG(DC_DISP_DISP_MEM_HIGH_PRIORITY_TIMER);
837 DUMP_REG(DC_DISP_DISP_TIMING_OPTIONS);
838 DUMP_REG(DC_DISP_REF_TO_SYNC);
839 DUMP_REG(DC_DISP_SYNC_WIDTH);
840 DUMP_REG(DC_DISP_BACK_PORCH);
841 DUMP_REG(DC_DISP_ACTIVE);
842 DUMP_REG(DC_DISP_FRONT_PORCH);
843 DUMP_REG(DC_DISP_H_PULSE0_CONTROL);
844 DUMP_REG(DC_DISP_H_PULSE0_POSITION_A);
845 DUMP_REG(DC_DISP_H_PULSE0_POSITION_B);
846 DUMP_REG(DC_DISP_H_PULSE0_POSITION_C);
847 DUMP_REG(DC_DISP_H_PULSE0_POSITION_D);
848 DUMP_REG(DC_DISP_H_PULSE1_CONTROL);
849 DUMP_REG(DC_DISP_H_PULSE1_POSITION_A);
850 DUMP_REG(DC_DISP_H_PULSE1_POSITION_B);
851 DUMP_REG(DC_DISP_H_PULSE1_POSITION_C);
852 DUMP_REG(DC_DISP_H_PULSE1_POSITION_D);
853 DUMP_REG(DC_DISP_H_PULSE2_CONTROL);
854 DUMP_REG(DC_DISP_H_PULSE2_POSITION_A);
855 DUMP_REG(DC_DISP_H_PULSE2_POSITION_B);
856 DUMP_REG(DC_DISP_H_PULSE2_POSITION_C);
857 DUMP_REG(DC_DISP_H_PULSE2_POSITION_D);
858 DUMP_REG(DC_DISP_V_PULSE0_CONTROL);
859 DUMP_REG(DC_DISP_V_PULSE0_POSITION_A);
860 DUMP_REG(DC_DISP_V_PULSE0_POSITION_B);
861 DUMP_REG(DC_DISP_V_PULSE0_POSITION_C);
862 DUMP_REG(DC_DISP_V_PULSE1_CONTROL);
863 DUMP_REG(DC_DISP_V_PULSE1_POSITION_A);
864 DUMP_REG(DC_DISP_V_PULSE1_POSITION_B);
865 DUMP_REG(DC_DISP_V_PULSE1_POSITION_C);
866 DUMP_REG(DC_DISP_V_PULSE2_CONTROL);
867 DUMP_REG(DC_DISP_V_PULSE2_POSITION_A);
868 DUMP_REG(DC_DISP_V_PULSE3_CONTROL);
869 DUMP_REG(DC_DISP_V_PULSE3_POSITION_A);
870 DUMP_REG(DC_DISP_M0_CONTROL);
871 DUMP_REG(DC_DISP_M1_CONTROL);
872 DUMP_REG(DC_DISP_DI_CONTROL);
873 DUMP_REG(DC_DISP_PP_CONTROL);
874 DUMP_REG(DC_DISP_PP_SELECT_A);
875 DUMP_REG(DC_DISP_PP_SELECT_B);
876 DUMP_REG(DC_DISP_PP_SELECT_C);
877 DUMP_REG(DC_DISP_PP_SELECT_D);
878 DUMP_REG(DC_DISP_DISP_CLOCK_CONTROL);
879 DUMP_REG(DC_DISP_DISP_INTERFACE_CONTROL);
880 DUMP_REG(DC_DISP_DISP_COLOR_CONTROL);
881 DUMP_REG(DC_DISP_SHIFT_CLOCK_OPTIONS);
882 DUMP_REG(DC_DISP_DATA_ENABLE_OPTIONS);
883 DUMP_REG(DC_DISP_SERIAL_INTERFACE_OPTIONS);
884 DUMP_REG(DC_DISP_LCD_SPI_OPTIONS);
885 DUMP_REG(DC_DISP_BORDER_COLOR);
886 DUMP_REG(DC_DISP_COLOR_KEY0_LOWER);
887 DUMP_REG(DC_DISP_COLOR_KEY0_UPPER);
888 DUMP_REG(DC_DISP_COLOR_KEY1_LOWER);
889 DUMP_REG(DC_DISP_COLOR_KEY1_UPPER);
890 DUMP_REG(DC_DISP_CURSOR_FOREGROUND);
891 DUMP_REG(DC_DISP_CURSOR_BACKGROUND);
892 DUMP_REG(DC_DISP_CURSOR_START_ADDR);
893 DUMP_REG(DC_DISP_CURSOR_START_ADDR_NS);
894 DUMP_REG(DC_DISP_CURSOR_POSITION);
895 DUMP_REG(DC_DISP_CURSOR_POSITION_NS);
896 DUMP_REG(DC_DISP_INIT_SEQ_CONTROL);
897 DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_A);
898 DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_B);
899 DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_C);
900 DUMP_REG(DC_DISP_SPI_INIT_SEQ_DATA_D);
901 DUMP_REG(DC_DISP_DC_MCCIF_FIFOCTRL);
902 DUMP_REG(DC_DISP_MCCIF_DISPLAY0A_HYST);
903 DUMP_REG(DC_DISP_MCCIF_DISPLAY0B_HYST);
904 DUMP_REG(DC_DISP_MCCIF_DISPLAY1A_HYST);
905 DUMP_REG(DC_DISP_MCCIF_DISPLAY1B_HYST);
906 DUMP_REG(DC_DISP_DAC_CRT_CTRL);
907 DUMP_REG(DC_DISP_DISP_MISC_CONTROL);
908 DUMP_REG(DC_DISP_SD_CONTROL);
909 DUMP_REG(DC_DISP_SD_CSC_COEFF);
910 DUMP_REG(DC_DISP_SD_LUT(0));
911 DUMP_REG(DC_DISP_SD_LUT(1));
912 DUMP_REG(DC_DISP_SD_LUT(2));
913 DUMP_REG(DC_DISP_SD_LUT(3));
914 DUMP_REG(DC_DISP_SD_LUT(4));
915 DUMP_REG(DC_DISP_SD_LUT(5));
916 DUMP_REG(DC_DISP_SD_LUT(6));
917 DUMP_REG(DC_DISP_SD_LUT(7));
918 DUMP_REG(DC_DISP_SD_LUT(8));
919 DUMP_REG(DC_DISP_SD_FLICKER_CONTROL);
920 DUMP_REG(DC_DISP_DC_PIXEL_COUNT);
921 DUMP_REG(DC_DISP_SD_HISTOGRAM(0));
922 DUMP_REG(DC_DISP_SD_HISTOGRAM(1));
923 DUMP_REG(DC_DISP_SD_HISTOGRAM(2));
924 DUMP_REG(DC_DISP_SD_HISTOGRAM(3));
925 DUMP_REG(DC_DISP_SD_HISTOGRAM(4));
926 DUMP_REG(DC_DISP_SD_HISTOGRAM(5));
927 DUMP_REG(DC_DISP_SD_HISTOGRAM(6));
928 DUMP_REG(DC_DISP_SD_HISTOGRAM(7));
929 DUMP_REG(DC_DISP_SD_BL_TF(0));
930 DUMP_REG(DC_DISP_SD_BL_TF(1));
931 DUMP_REG(DC_DISP_SD_BL_TF(2));
932 DUMP_REG(DC_DISP_SD_BL_TF(3));
933 DUMP_REG(DC_DISP_SD_BL_CONTROL);
934 DUMP_REG(DC_DISP_SD_HW_K_VALUES);
935 DUMP_REG(DC_DISP_SD_MAN_K_VALUES);
936 DUMP_REG(DC_WIN_WIN_OPTIONS);
937 DUMP_REG(DC_WIN_BYTE_SWAP);
938 DUMP_REG(DC_WIN_BUFFER_CONTROL);
939 DUMP_REG(DC_WIN_COLOR_DEPTH);
940 DUMP_REG(DC_WIN_POSITION);
941 DUMP_REG(DC_WIN_SIZE);
942 DUMP_REG(DC_WIN_PRESCALED_SIZE);
943 DUMP_REG(DC_WIN_H_INITIAL_DDA);
944 DUMP_REG(DC_WIN_V_INITIAL_DDA);
945 DUMP_REG(DC_WIN_DDA_INC);
946 DUMP_REG(DC_WIN_LINE_STRIDE);
947 DUMP_REG(DC_WIN_BUF_STRIDE);
948 DUMP_REG(DC_WIN_UV_BUF_STRIDE);
949 DUMP_REG(DC_WIN_BUFFER_ADDR_MODE);
950 DUMP_REG(DC_WIN_DV_CONTROL);
951 DUMP_REG(DC_WIN_BLEND_NOKEY);
952 DUMP_REG(DC_WIN_BLEND_1WIN);
953 DUMP_REG(DC_WIN_BLEND_2WIN_X);
954 DUMP_REG(DC_WIN_BLEND_2WIN_Y);
955 DUMP_REG(DC_WIN_BLEND_3WIN_XY);
956 DUMP_REG(DC_WIN_HP_FETCH_CONTROL);
957 DUMP_REG(DC_WINBUF_START_ADDR);
958 DUMP_REG(DC_WINBUF_START_ADDR_NS);
959 DUMP_REG(DC_WINBUF_START_ADDR_U);
960 DUMP_REG(DC_WINBUF_START_ADDR_U_NS);
961 DUMP_REG(DC_WINBUF_START_ADDR_V);
962 DUMP_REG(DC_WINBUF_START_ADDR_V_NS);
963 DUMP_REG(DC_WINBUF_ADDR_H_OFFSET);
964 DUMP_REG(DC_WINBUF_ADDR_H_OFFSET_NS);
965 DUMP_REG(DC_WINBUF_ADDR_V_OFFSET);
966 DUMP_REG(DC_WINBUF_ADDR_V_OFFSET_NS);
967 DUMP_REG(DC_WINBUF_UFLOW_STATUS);
968 DUMP_REG(DC_WINBUF_AD_UFLOW_STATUS);
969 DUMP_REG(DC_WINBUF_BD_UFLOW_STATUS);
970 DUMP_REG(DC_WINBUF_CD_UFLOW_STATUS);
971
972 #undef DUMP_REG
973
974 return 0;
975 }
976
977 static struct drm_info_list debugfs_files[] = {
978 { "regs", tegra_dc_show_regs, 0, NULL },
979 };
980
tegra_dc_debugfs_init(struct tegra_dc * dc,struct drm_minor * minor)981 static int tegra_dc_debugfs_init(struct tegra_dc *dc, struct drm_minor *minor)
982 {
983 unsigned int i;
984 char *name;
985 int err;
986
987 name = kasprintf(GFP_KERNEL, "dc.%d", dc->pipe);
988 dc->debugfs = debugfs_create_dir(name, minor->debugfs_root);
989 kfree(name);
990
991 if (!dc->debugfs)
992 return -ENOMEM;
993
994 dc->debugfs_files = kmemdup(debugfs_files, sizeof(debugfs_files),
995 GFP_KERNEL);
996 if (!dc->debugfs_files) {
997 err = -ENOMEM;
998 goto remove;
999 }
1000
1001 for (i = 0; i < ARRAY_SIZE(debugfs_files); i++)
1002 dc->debugfs_files[i].data = dc;
1003
1004 err = drm_debugfs_create_files(dc->debugfs_files,
1005 ARRAY_SIZE(debugfs_files),
1006 dc->debugfs, minor);
1007 if (err < 0)
1008 goto free;
1009
1010 dc->minor = minor;
1011
1012 return 0;
1013
1014 free:
1015 kfree(dc->debugfs_files);
1016 dc->debugfs_files = NULL;
1017 remove:
1018 debugfs_remove(dc->debugfs);
1019 dc->debugfs = NULL;
1020
1021 return err;
1022 }
1023
tegra_dc_debugfs_exit(struct tegra_dc * dc)1024 static int tegra_dc_debugfs_exit(struct tegra_dc *dc)
1025 {
1026 drm_debugfs_remove_files(dc->debugfs_files, ARRAY_SIZE(debugfs_files),
1027 dc->minor);
1028 dc->minor = NULL;
1029
1030 kfree(dc->debugfs_files);
1031 dc->debugfs_files = NULL;
1032
1033 debugfs_remove(dc->debugfs);
1034 dc->debugfs = NULL;
1035
1036 return 0;
1037 }
1038
tegra_dc_drm_init(struct host1x_client * client,struct drm_device * drm)1039 static int tegra_dc_drm_init(struct host1x_client *client,
1040 struct drm_device *drm)
1041 {
1042 struct tegra_dc *dc = host1x_client_to_dc(client);
1043 int err;
1044
1045 dc->pipe = drm->mode_config.num_crtc;
1046
1047 drm_crtc_init(drm, &dc->base, &tegra_crtc_funcs);
1048 drm_mode_crtc_set_gamma_size(&dc->base, 256);
1049 drm_crtc_helper_add(&dc->base, &tegra_crtc_helper_funcs);
1050
1051 err = tegra_dc_rgb_init(drm, dc);
1052 if (err < 0 && err != -ENODEV) {
1053 dev_err(dc->dev, "failed to initialize RGB output: %d\n", err);
1054 return err;
1055 }
1056
1057 err = tegra_dc_add_planes(drm, dc);
1058 if (err < 0)
1059 return err;
1060
1061 if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1062 err = tegra_dc_debugfs_init(dc, drm->primary);
1063 if (err < 0)
1064 dev_err(dc->dev, "debugfs setup failed: %d\n", err);
1065 }
1066
1067 err = devm_request_irq(dc->dev, dc->irq, tegra_dc_irq, 0,
1068 dev_name(dc->dev), dc);
1069 if (err < 0) {
1070 dev_err(dc->dev, "failed to request IRQ#%u: %d\n", dc->irq,
1071 err);
1072 return err;
1073 }
1074
1075 return 0;
1076 }
1077
tegra_dc_drm_exit(struct host1x_client * client)1078 static int tegra_dc_drm_exit(struct host1x_client *client)
1079 {
1080 struct tegra_dc *dc = host1x_client_to_dc(client);
1081 int err;
1082
1083 devm_free_irq(dc->dev, dc->irq, dc);
1084
1085 if (IS_ENABLED(CONFIG_DEBUG_FS)) {
1086 err = tegra_dc_debugfs_exit(dc);
1087 if (err < 0)
1088 dev_err(dc->dev, "debugfs cleanup failed: %d\n", err);
1089 }
1090
1091 err = tegra_dc_rgb_exit(dc);
1092 if (err) {
1093 dev_err(dc->dev, "failed to shutdown RGB output: %d\n", err);
1094 return err;
1095 }
1096
1097 return 0;
1098 }
1099
1100 static const struct host1x_client_ops dc_client_ops = {
1101 .drm_init = tegra_dc_drm_init,
1102 .drm_exit = tegra_dc_drm_exit,
1103 };
1104
tegra_dc_probe(struct platform_device * pdev)1105 static int tegra_dc_probe(struct platform_device *pdev)
1106 {
1107 struct host1x_drm *host1x = host1x_get_drm_data(pdev->dev.parent);
1108 struct resource *regs;
1109 struct tegra_dc *dc;
1110 int err;
1111
1112 dc = devm_kzalloc(&pdev->dev, sizeof(*dc), GFP_KERNEL);
1113 if (!dc)
1114 return -ENOMEM;
1115
1116 spin_lock_init(&dc->lock);
1117 INIT_LIST_HEAD(&dc->list);
1118 dc->dev = &pdev->dev;
1119
1120 dc->clk = devm_clk_get(&pdev->dev, NULL);
1121 if (IS_ERR(dc->clk)) {
1122 dev_err(&pdev->dev, "failed to get clock\n");
1123 return PTR_ERR(dc->clk);
1124 }
1125
1126 err = clk_prepare_enable(dc->clk);
1127 if (err < 0)
1128 return err;
1129
1130 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1131 dc->regs = devm_ioremap_resource(&pdev->dev, regs);
1132 if (IS_ERR(dc->regs))
1133 return PTR_ERR(dc->regs);
1134
1135 dc->irq = platform_get_irq(pdev, 0);
1136 if (dc->irq < 0) {
1137 dev_err(&pdev->dev, "failed to get IRQ\n");
1138 return -ENXIO;
1139 }
1140
1141 INIT_LIST_HEAD(&dc->client.list);
1142 dc->client.ops = &dc_client_ops;
1143 dc->client.dev = &pdev->dev;
1144
1145 err = tegra_dc_rgb_probe(dc);
1146 if (err < 0 && err != -ENODEV) {
1147 dev_err(&pdev->dev, "failed to probe RGB output: %d\n", err);
1148 return err;
1149 }
1150
1151 err = host1x_register_client(host1x, &dc->client);
1152 if (err < 0) {
1153 dev_err(&pdev->dev, "failed to register host1x client: %d\n",
1154 err);
1155 return err;
1156 }
1157
1158 platform_set_drvdata(pdev, dc);
1159
1160 return 0;
1161 }
1162
tegra_dc_remove(struct platform_device * pdev)1163 static int tegra_dc_remove(struct platform_device *pdev)
1164 {
1165 struct host1x_drm *host1x = host1x_get_drm_data(pdev->dev.parent);
1166 struct tegra_dc *dc = platform_get_drvdata(pdev);
1167 int err;
1168
1169 err = host1x_unregister_client(host1x, &dc->client);
1170 if (err < 0) {
1171 dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
1172 err);
1173 return err;
1174 }
1175
1176 clk_disable_unprepare(dc->clk);
1177
1178 return 0;
1179 }
1180
1181 static struct of_device_id tegra_dc_of_match[] = {
1182 { .compatible = "nvidia,tegra30-dc", },
1183 { .compatible = "nvidia,tegra20-dc", },
1184 { },
1185 };
1186
1187 struct platform_driver tegra_dc_driver = {
1188 .driver = {
1189 .name = "tegra-dc",
1190 .owner = THIS_MODULE,
1191 .of_match_table = tegra_dc_of_match,
1192 },
1193 .probe = tegra_dc_probe,
1194 .remove = tegra_dc_remove,
1195 };
1196