1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Ingenic JZ47xx KMS driver
4 //
5 // Copyright (C) 2019, Paul Cercueil <paul@crapouillou.net>
6 
7 #include "ingenic-drm.h"
8 
9 #include <linux/bitfield.h>
10 #include <linux/component.h>
11 #include <linux/clk.h>
12 #include <linux/dma-mapping.h>
13 #include <linux/io.h>
14 #include <linux/media-bus-format.h>
15 #include <linux/module.h>
16 #include <linux/mutex.h>
17 #include <linux/of.h>
18 #include <linux/of_reserved_mem.h>
19 #include <linux/platform_device.h>
20 #include <linux/pm.h>
21 #include <linux/regmap.h>
22 
23 #include <drm/drm_atomic.h>
24 #include <drm/drm_atomic_helper.h>
25 #include <drm/drm_bridge.h>
26 #include <drm/drm_bridge_connector.h>
27 #include <drm/drm_color_mgmt.h>
28 #include <drm/drm_crtc.h>
29 #include <drm/drm_damage_helper.h>
30 #include <drm/drm_drv.h>
31 #include <drm/drm_encoder.h>
32 #include <drm/drm_gem_dma_helper.h>
33 #include <drm/drm_fb_dma_helper.h>
34 #include <drm/drm_fbdev_generic.h>
35 #include <drm/drm_fourcc.h>
36 #include <drm/drm_framebuffer.h>
37 #include <drm/drm_gem_atomic_helper.h>
38 #include <drm/drm_gem_framebuffer_helper.h>
39 #include <drm/drm_managed.h>
40 #include <drm/drm_of.h>
41 #include <drm/drm_panel.h>
42 #include <drm/drm_plane.h>
43 #include <drm/drm_probe_helper.h>
44 #include <drm/drm_vblank.h>
45 
46 #define HWDESC_PALETTE 2
47 
48 struct ingenic_dma_hwdesc {
49 	u32 next;
50 	u32 addr;
51 	u32 id;
52 	u32 cmd;
53 	/* extended hw descriptor for jz4780 */
54 	u32 offsize;
55 	u32 pagewidth;
56 	u32 cpos;
57 	u32 dessize;
58 } __aligned(16);
59 
60 struct ingenic_dma_hwdescs {
61 	struct ingenic_dma_hwdesc hwdesc[3];
62 	u16 palette[256] __aligned(16);
63 };
64 
65 struct jz_soc_info {
66 	bool needs_dev_clk;
67 	bool has_osd;
68 	bool has_alpha;
69 	bool map_noncoherent;
70 	bool use_extended_hwdesc;
71 	bool plane_f0_not_working;
72 	u32 max_burst;
73 	unsigned int max_width, max_height;
74 	const u32 *formats_f0, *formats_f1;
75 	unsigned int num_formats_f0, num_formats_f1;
76 };
77 
78 struct ingenic_drm_private_state {
79 	struct drm_private_state base;
80 	bool use_palette;
81 };
82 
83 struct ingenic_drm {
84 	struct drm_device drm;
85 	/*
86 	 * f1 (aka. foreground1) is our primary plane, on top of which
87 	 * f0 (aka. foreground0) can be overlayed. Z-order is fixed in
88 	 * hardware and cannot be changed.
89 	 */
90 	struct drm_plane f0, f1, *ipu_plane;
91 	struct drm_crtc crtc;
92 
93 	struct device *dev;
94 	struct regmap *map;
95 	struct clk *lcd_clk, *pix_clk;
96 	const struct jz_soc_info *soc_info;
97 
98 	struct ingenic_dma_hwdescs *dma_hwdescs;
99 	dma_addr_t dma_hwdescs_phys;
100 
101 	bool panel_is_sharp;
102 	bool no_vblank;
103 
104 	/*
105 	 * clk_mutex is used to synchronize the pixel clock rate update with
106 	 * the VBLANK. When the pixel clock's parent clock needs to be updated,
107 	 * clock_nb's notifier function will lock the mutex, then wait until the
108 	 * next VBLANK. At that point, the parent clock's rate can be updated,
109 	 * and the mutex is then unlocked. If an atomic commit happens in the
110 	 * meantime, it will lock on the mutex, effectively waiting until the
111 	 * clock update process finishes. Finally, the pixel clock's rate will
112 	 * be recomputed when the mutex has been released, in the pending atomic
113 	 * commit, or a future one.
114 	 */
115 	struct mutex clk_mutex;
116 	bool update_clk_rate;
117 	struct notifier_block clock_nb;
118 
119 	struct drm_private_obj private_obj;
120 };
121 
122 struct ingenic_drm_bridge {
123 	struct drm_encoder encoder;
124 	struct drm_bridge bridge, *next_bridge;
125 
126 	struct drm_bus_cfg bus_cfg;
127 };
128 
129 static inline struct ingenic_drm_bridge *
130 to_ingenic_drm_bridge(struct drm_encoder *encoder)
131 {
132 	return container_of(encoder, struct ingenic_drm_bridge, encoder);
133 }
134 
135 static inline struct ingenic_drm_private_state *
136 to_ingenic_drm_priv_state(struct drm_private_state *state)
137 {
138 	return container_of(state, struct ingenic_drm_private_state, base);
139 }
140 
141 static struct ingenic_drm_private_state *
142 ingenic_drm_get_priv_state(struct ingenic_drm *priv, struct drm_atomic_state *state)
143 {
144 	struct drm_private_state *priv_state;
145 
146 	priv_state = drm_atomic_get_private_obj_state(state, &priv->private_obj);
147 	if (IS_ERR(priv_state))
148 		return ERR_CAST(priv_state);
149 
150 	return to_ingenic_drm_priv_state(priv_state);
151 }
152 
153 static struct ingenic_drm_private_state *
154 ingenic_drm_get_new_priv_state(struct ingenic_drm *priv, struct drm_atomic_state *state)
155 {
156 	struct drm_private_state *priv_state;
157 
158 	priv_state = drm_atomic_get_new_private_obj_state(state, &priv->private_obj);
159 	if (!priv_state)
160 		return NULL;
161 
162 	return to_ingenic_drm_priv_state(priv_state);
163 }
164 
165 static bool ingenic_drm_writeable_reg(struct device *dev, unsigned int reg)
166 {
167 	switch (reg) {
168 	case JZ_REG_LCD_IID:
169 	case JZ_REG_LCD_SA0:
170 	case JZ_REG_LCD_FID0:
171 	case JZ_REG_LCD_CMD0:
172 	case JZ_REG_LCD_SA1:
173 	case JZ_REG_LCD_FID1:
174 	case JZ_REG_LCD_CMD1:
175 		return false;
176 	default:
177 		return true;
178 	}
179 }
180 
181 static const struct regmap_config ingenic_drm_regmap_config = {
182 	.reg_bits = 32,
183 	.val_bits = 32,
184 	.reg_stride = 4,
185 
186 	.writeable_reg = ingenic_drm_writeable_reg,
187 };
188 
189 static inline struct ingenic_drm *drm_device_get_priv(struct drm_device *drm)
190 {
191 	return container_of(drm, struct ingenic_drm, drm);
192 }
193 
194 static inline struct ingenic_drm *drm_crtc_get_priv(struct drm_crtc *crtc)
195 {
196 	return container_of(crtc, struct ingenic_drm, crtc);
197 }
198 
199 static inline struct ingenic_drm *drm_nb_get_priv(struct notifier_block *nb)
200 {
201 	return container_of(nb, struct ingenic_drm, clock_nb);
202 }
203 
204 static inline dma_addr_t dma_hwdesc_addr(const struct ingenic_drm *priv,
205 					 unsigned int idx)
206 {
207 	u32 offset = offsetof(struct ingenic_dma_hwdescs, hwdesc[idx]);
208 
209 	return priv->dma_hwdescs_phys + offset;
210 }
211 
212 static int ingenic_drm_update_pixclk(struct notifier_block *nb,
213 				     unsigned long action,
214 				     void *data)
215 {
216 	struct ingenic_drm *priv = drm_nb_get_priv(nb);
217 
218 	switch (action) {
219 	case PRE_RATE_CHANGE:
220 		mutex_lock(&priv->clk_mutex);
221 		priv->update_clk_rate = true;
222 		drm_crtc_wait_one_vblank(&priv->crtc);
223 		return NOTIFY_OK;
224 	default:
225 		mutex_unlock(&priv->clk_mutex);
226 		return NOTIFY_OK;
227 	}
228 }
229 
230 static void ingenic_drm_bridge_atomic_enable(struct drm_bridge *bridge,
231 					     struct drm_bridge_state *old_bridge_state)
232 {
233 	struct ingenic_drm *priv = drm_device_get_priv(bridge->dev);
234 
235 	regmap_write(priv->map, JZ_REG_LCD_STATE, 0);
236 
237 	regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
238 			   JZ_LCD_CTRL_ENABLE | JZ_LCD_CTRL_DISABLE,
239 			   JZ_LCD_CTRL_ENABLE);
240 }
241 
242 static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc,
243 					   struct drm_atomic_state *state)
244 {
245 	struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
246 	struct ingenic_drm_private_state *priv_state;
247 	unsigned int next_id;
248 
249 	priv_state = ingenic_drm_get_priv_state(priv, state);
250 	if (WARN_ON(IS_ERR(priv_state)))
251 		return;
252 
253 	/* Set addresses of our DMA descriptor chains */
254 	next_id = priv_state->use_palette ? HWDESC_PALETTE : 0;
255 	regmap_write(priv->map, JZ_REG_LCD_DA0, dma_hwdesc_addr(priv, next_id));
256 	regmap_write(priv->map, JZ_REG_LCD_DA1, dma_hwdesc_addr(priv, 1));
257 
258 	drm_crtc_vblank_on(crtc);
259 }
260 
261 static void ingenic_drm_bridge_atomic_disable(struct drm_bridge *bridge,
262 					      struct drm_bridge_state *old_bridge_state)
263 {
264 	struct ingenic_drm *priv = drm_device_get_priv(bridge->dev);
265 	unsigned int var;
266 
267 	regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
268 			   JZ_LCD_CTRL_DISABLE, JZ_LCD_CTRL_DISABLE);
269 
270 	regmap_read_poll_timeout(priv->map, JZ_REG_LCD_STATE, var,
271 				 var & JZ_LCD_STATE_DISABLED,
272 				 1000, 0);
273 }
274 
275 static void ingenic_drm_crtc_atomic_disable(struct drm_crtc *crtc,
276 					    struct drm_atomic_state *state)
277 {
278 	drm_crtc_vblank_off(crtc);
279 }
280 
281 static void ingenic_drm_crtc_update_timings(struct ingenic_drm *priv,
282 					    struct drm_display_mode *mode)
283 {
284 	unsigned int vpe, vds, vde, vt, hpe, hds, hde, ht;
285 
286 	vpe = mode->crtc_vsync_end - mode->crtc_vsync_start;
287 	vds = mode->crtc_vtotal - mode->crtc_vsync_start;
288 	vde = vds + mode->crtc_vdisplay;
289 	vt = vde + mode->crtc_vsync_start - mode->crtc_vdisplay;
290 
291 	hpe = mode->crtc_hsync_end - mode->crtc_hsync_start;
292 	hds = mode->crtc_htotal - mode->crtc_hsync_start;
293 	hde = hds + mode->crtc_hdisplay;
294 	ht = hde + mode->crtc_hsync_start - mode->crtc_hdisplay;
295 
296 	regmap_write(priv->map, JZ_REG_LCD_VSYNC,
297 		     0 << JZ_LCD_VSYNC_VPS_OFFSET |
298 		     vpe << JZ_LCD_VSYNC_VPE_OFFSET);
299 
300 	regmap_write(priv->map, JZ_REG_LCD_HSYNC,
301 		     0 << JZ_LCD_HSYNC_HPS_OFFSET |
302 		     hpe << JZ_LCD_HSYNC_HPE_OFFSET);
303 
304 	regmap_write(priv->map, JZ_REG_LCD_VAT,
305 		     ht << JZ_LCD_VAT_HT_OFFSET |
306 		     vt << JZ_LCD_VAT_VT_OFFSET);
307 
308 	regmap_write(priv->map, JZ_REG_LCD_DAH,
309 		     hds << JZ_LCD_DAH_HDS_OFFSET |
310 		     hde << JZ_LCD_DAH_HDE_OFFSET);
311 	regmap_write(priv->map, JZ_REG_LCD_DAV,
312 		     vds << JZ_LCD_DAV_VDS_OFFSET |
313 		     vde << JZ_LCD_DAV_VDE_OFFSET);
314 
315 	if (priv->panel_is_sharp) {
316 		regmap_write(priv->map, JZ_REG_LCD_PS, hde << 16 | (hde + 1));
317 		regmap_write(priv->map, JZ_REG_LCD_CLS, hde << 16 | (hde + 1));
318 		regmap_write(priv->map, JZ_REG_LCD_SPL, hpe << 16 | (hpe + 1));
319 		regmap_write(priv->map, JZ_REG_LCD_REV, mode->htotal << 16);
320 	}
321 
322 	regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
323 			   JZ_LCD_CTRL_OFUP | JZ_LCD_CTRL_BURST_MASK,
324 			   JZ_LCD_CTRL_OFUP | priv->soc_info->max_burst);
325 
326 	/*
327 	 * IPU restart - specify how much time the LCDC will wait before
328 	 * transferring a new frame from the IPU. The value is the one
329 	 * suggested in the programming manual.
330 	 */
331 	regmap_write(priv->map, JZ_REG_LCD_IPUR, JZ_LCD_IPUR_IPUREN |
332 		     (ht * vpe / 3) << JZ_LCD_IPUR_IPUR_LSB);
333 }
334 
335 static int ingenic_drm_crtc_atomic_check(struct drm_crtc *crtc,
336 					 struct drm_atomic_state *state)
337 {
338 	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
339 									  crtc);
340 	struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
341 	struct drm_plane_state *f1_state, *f0_state, *ipu_state = NULL;
342 
343 	if (crtc_state->gamma_lut &&
344 	    drm_color_lut_size(crtc_state->gamma_lut) != ARRAY_SIZE(priv->dma_hwdescs->palette)) {
345 		dev_dbg(priv->dev, "Invalid palette size\n");
346 		return -EINVAL;
347 	}
348 
349 	if (drm_atomic_crtc_needs_modeset(crtc_state) && priv->soc_info->has_osd) {
350 		f1_state = drm_atomic_get_plane_state(crtc_state->state,
351 						      &priv->f1);
352 		if (IS_ERR(f1_state))
353 			return PTR_ERR(f1_state);
354 
355 		f0_state = drm_atomic_get_plane_state(crtc_state->state,
356 						      &priv->f0);
357 		if (IS_ERR(f0_state))
358 			return PTR_ERR(f0_state);
359 
360 		if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU) && priv->ipu_plane) {
361 			ipu_state = drm_atomic_get_plane_state(crtc_state->state,
362 							       priv->ipu_plane);
363 			if (IS_ERR(ipu_state))
364 				return PTR_ERR(ipu_state);
365 
366 			/* IPU and F1 planes cannot be enabled at the same time. */
367 			if (f1_state->fb && ipu_state->fb) {
368 				dev_dbg(priv->dev, "Cannot enable both F1 and IPU\n");
369 				return -EINVAL;
370 			}
371 		}
372 
373 		/* If all the planes are disabled, we won't get a VBLANK IRQ */
374 		priv->no_vblank = !f1_state->fb && !f0_state->fb &&
375 				  !(ipu_state && ipu_state->fb);
376 	}
377 
378 	return 0;
379 }
380 
381 static enum drm_mode_status
382 ingenic_drm_crtc_mode_valid(struct drm_crtc *crtc, const struct drm_display_mode *mode)
383 {
384 	struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
385 	long rate;
386 
387 	if (mode->hdisplay > priv->soc_info->max_width)
388 		return MODE_BAD_HVALUE;
389 	if (mode->vdisplay > priv->soc_info->max_height)
390 		return MODE_BAD_VVALUE;
391 
392 	rate = clk_round_rate(priv->pix_clk, mode->clock * 1000);
393 	if (rate < 0)
394 		return MODE_CLOCK_RANGE;
395 
396 	return MODE_OK;
397 }
398 
399 static void ingenic_drm_crtc_atomic_begin(struct drm_crtc *crtc,
400 					  struct drm_atomic_state *state)
401 {
402 	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
403 									  crtc);
404 	struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
405 	u32 ctrl = 0;
406 
407 	if (priv->soc_info->has_osd &&
408 	    drm_atomic_crtc_needs_modeset(crtc_state)) {
409 		/*
410 		 * If IPU plane is enabled, enable IPU as source for the F1
411 		 * plane; otherwise use regular DMA.
412 		 */
413 		if (priv->ipu_plane && priv->ipu_plane->state->fb)
414 			ctrl |= JZ_LCD_OSDCTRL_IPU;
415 
416 		regmap_update_bits(priv->map, JZ_REG_LCD_OSDCTRL,
417 				   JZ_LCD_OSDCTRL_IPU, ctrl);
418 	}
419 }
420 
421 static void ingenic_drm_crtc_atomic_flush(struct drm_crtc *crtc,
422 					  struct drm_atomic_state *state)
423 {
424 	struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
425 	struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state,
426 									  crtc);
427 	struct drm_pending_vblank_event *event = crtc_state->event;
428 
429 	if (drm_atomic_crtc_needs_modeset(crtc_state)) {
430 		ingenic_drm_crtc_update_timings(priv, &crtc_state->adjusted_mode);
431 		priv->update_clk_rate = true;
432 	}
433 
434 	if (priv->update_clk_rate) {
435 		mutex_lock(&priv->clk_mutex);
436 		clk_set_rate(priv->pix_clk,
437 			     crtc_state->adjusted_mode.crtc_clock * 1000);
438 		priv->update_clk_rate = false;
439 		mutex_unlock(&priv->clk_mutex);
440 	}
441 
442 	if (event) {
443 		crtc_state->event = NULL;
444 
445 		spin_lock_irq(&crtc->dev->event_lock);
446 		if (drm_crtc_vblank_get(crtc) == 0)
447 			drm_crtc_arm_vblank_event(crtc, event);
448 		else
449 			drm_crtc_send_vblank_event(crtc, event);
450 		spin_unlock_irq(&crtc->dev->event_lock);
451 	}
452 }
453 
454 static int ingenic_drm_plane_atomic_check(struct drm_plane *plane,
455 					  struct drm_atomic_state *state)
456 {
457 	struct drm_plane_state *old_plane_state = drm_atomic_get_old_plane_state(state,
458 										 plane);
459 	struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
460 										 plane);
461 	struct ingenic_drm *priv = drm_device_get_priv(plane->dev);
462 	struct ingenic_drm_private_state *priv_state;
463 	struct drm_crtc_state *crtc_state;
464 	struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
465 	int ret;
466 
467 	if (!crtc)
468 		return 0;
469 
470 	if (priv->soc_info->plane_f0_not_working && plane == &priv->f0)
471 		return -EINVAL;
472 
473 	crtc_state = drm_atomic_get_existing_crtc_state(state,
474 							crtc);
475 	if (WARN_ON(!crtc_state))
476 		return -EINVAL;
477 
478 	priv_state = ingenic_drm_get_priv_state(priv, state);
479 	if (IS_ERR(priv_state))
480 		return PTR_ERR(priv_state);
481 
482 	ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
483 						  DRM_PLANE_NO_SCALING,
484 						  DRM_PLANE_NO_SCALING,
485 						  priv->soc_info->has_osd,
486 						  true);
487 	if (ret)
488 		return ret;
489 
490 	/*
491 	 * If OSD is not available, check that the width/height match.
492 	 * Note that state->src_* are in 16.16 fixed-point format.
493 	 */
494 	if (!priv->soc_info->has_osd &&
495 	    (new_plane_state->src_x != 0 ||
496 	     (new_plane_state->src_w >> 16) != new_plane_state->crtc_w ||
497 	     (new_plane_state->src_h >> 16) != new_plane_state->crtc_h))
498 		return -EINVAL;
499 
500 	priv_state->use_palette = new_plane_state->fb &&
501 		new_plane_state->fb->format->format == DRM_FORMAT_C8;
502 
503 	/*
504 	 * Require full modeset if enabling or disabling a plane, or changing
505 	 * its position, size or depth.
506 	 */
507 	if (priv->soc_info->has_osd &&
508 	    (!old_plane_state->fb || !new_plane_state->fb ||
509 	     old_plane_state->crtc_x != new_plane_state->crtc_x ||
510 	     old_plane_state->crtc_y != new_plane_state->crtc_y ||
511 	     old_plane_state->crtc_w != new_plane_state->crtc_w ||
512 	     old_plane_state->crtc_h != new_plane_state->crtc_h ||
513 	     old_plane_state->fb->format->format != new_plane_state->fb->format->format))
514 		crtc_state->mode_changed = true;
515 
516 	if (priv->soc_info->map_noncoherent)
517 		drm_atomic_helper_check_plane_damage(state, new_plane_state);
518 
519 	return 0;
520 }
521 
522 static void ingenic_drm_plane_enable(struct ingenic_drm *priv,
523 				     struct drm_plane *plane)
524 {
525 	unsigned int en_bit;
526 
527 	if (priv->soc_info->has_osd) {
528 		if (plane != &priv->f0)
529 			en_bit = JZ_LCD_OSDC_F1EN;
530 		else
531 			en_bit = JZ_LCD_OSDC_F0EN;
532 
533 		regmap_set_bits(priv->map, JZ_REG_LCD_OSDC, en_bit);
534 	}
535 }
536 
537 void ingenic_drm_plane_disable(struct device *dev, struct drm_plane *plane)
538 {
539 	struct ingenic_drm *priv = dev_get_drvdata(dev);
540 	unsigned int en_bit;
541 
542 	if (priv->soc_info->has_osd) {
543 		if (plane != &priv->f0)
544 			en_bit = JZ_LCD_OSDC_F1EN;
545 		else
546 			en_bit = JZ_LCD_OSDC_F0EN;
547 
548 		regmap_clear_bits(priv->map, JZ_REG_LCD_OSDC, en_bit);
549 	}
550 }
551 
552 static void ingenic_drm_plane_atomic_disable(struct drm_plane *plane,
553 					     struct drm_atomic_state *state)
554 {
555 	struct ingenic_drm *priv = drm_device_get_priv(plane->dev);
556 
557 	ingenic_drm_plane_disable(priv->dev, plane);
558 }
559 
560 void ingenic_drm_plane_config(struct device *dev,
561 			      struct drm_plane *plane, u32 fourcc)
562 {
563 	struct ingenic_drm *priv = dev_get_drvdata(dev);
564 	struct drm_plane_state *state = plane->state;
565 	unsigned int xy_reg, size_reg;
566 	unsigned int ctrl = 0;
567 
568 	ingenic_drm_plane_enable(priv, plane);
569 
570 	if (priv->soc_info->has_osd && plane != &priv->f0) {
571 		switch (fourcc) {
572 		case DRM_FORMAT_XRGB1555:
573 			ctrl |= JZ_LCD_OSDCTRL_RGB555;
574 			fallthrough;
575 		case DRM_FORMAT_RGB565:
576 			ctrl |= JZ_LCD_OSDCTRL_BPP_15_16;
577 			break;
578 		case DRM_FORMAT_RGB888:
579 			ctrl |= JZ_LCD_OSDCTRL_BPP_24_COMP;
580 			break;
581 		case DRM_FORMAT_XRGB8888:
582 			ctrl |= JZ_LCD_OSDCTRL_BPP_18_24;
583 			break;
584 		case DRM_FORMAT_XRGB2101010:
585 			ctrl |= JZ_LCD_OSDCTRL_BPP_30;
586 			break;
587 		}
588 
589 		regmap_update_bits(priv->map, JZ_REG_LCD_OSDCTRL,
590 				   JZ_LCD_OSDCTRL_BPP_MASK, ctrl);
591 	} else {
592 		switch (fourcc) {
593 		case DRM_FORMAT_C8:
594 			ctrl |= JZ_LCD_CTRL_BPP_8;
595 			break;
596 		case DRM_FORMAT_XRGB1555:
597 			ctrl |= JZ_LCD_CTRL_RGB555;
598 			fallthrough;
599 		case DRM_FORMAT_RGB565:
600 			ctrl |= JZ_LCD_CTRL_BPP_15_16;
601 			break;
602 		case DRM_FORMAT_RGB888:
603 			ctrl |= JZ_LCD_CTRL_BPP_24_COMP;
604 			break;
605 		case DRM_FORMAT_XRGB8888:
606 			ctrl |= JZ_LCD_CTRL_BPP_18_24;
607 			break;
608 		case DRM_FORMAT_XRGB2101010:
609 			ctrl |= JZ_LCD_CTRL_BPP_30;
610 			break;
611 		}
612 
613 		regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
614 				   JZ_LCD_CTRL_BPP_MASK, ctrl);
615 	}
616 
617 	if (priv->soc_info->has_osd) {
618 		if (plane != &priv->f0) {
619 			xy_reg = JZ_REG_LCD_XYP1;
620 			size_reg = JZ_REG_LCD_SIZE1;
621 		} else {
622 			xy_reg = JZ_REG_LCD_XYP0;
623 			size_reg = JZ_REG_LCD_SIZE0;
624 		}
625 
626 		regmap_write(priv->map, xy_reg,
627 			     state->crtc_x << JZ_LCD_XYP01_XPOS_LSB |
628 			     state->crtc_y << JZ_LCD_XYP01_YPOS_LSB);
629 		regmap_write(priv->map, size_reg,
630 			     state->crtc_w << JZ_LCD_SIZE01_WIDTH_LSB |
631 			     state->crtc_h << JZ_LCD_SIZE01_HEIGHT_LSB);
632 	}
633 }
634 
635 bool ingenic_drm_map_noncoherent(const struct device *dev)
636 {
637 	const struct ingenic_drm *priv = dev_get_drvdata(dev);
638 
639 	return priv->soc_info->map_noncoherent;
640 }
641 
642 static void ingenic_drm_update_palette(struct ingenic_drm *priv,
643 				       const struct drm_color_lut *lut)
644 {
645 	unsigned int i;
646 
647 	for (i = 0; i < ARRAY_SIZE(priv->dma_hwdescs->palette); i++) {
648 		u16 color = drm_color_lut_extract(lut[i].red, 5) << 11
649 			| drm_color_lut_extract(lut[i].green, 6) << 5
650 			| drm_color_lut_extract(lut[i].blue, 5);
651 
652 		priv->dma_hwdescs->palette[i] = color;
653 	}
654 }
655 
656 static void ingenic_drm_plane_atomic_update(struct drm_plane *plane,
657 					    struct drm_atomic_state *state)
658 {
659 	struct ingenic_drm *priv = drm_device_get_priv(plane->dev);
660 	struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, plane);
661 	struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state, plane);
662 	unsigned int width, height, cpp, next_id, plane_id;
663 	struct ingenic_drm_private_state *priv_state;
664 	struct drm_crtc_state *crtc_state;
665 	struct ingenic_dma_hwdesc *hwdesc;
666 	dma_addr_t addr;
667 	u32 fourcc;
668 
669 	if (newstate && newstate->fb) {
670 		if (priv->soc_info->map_noncoherent)
671 			drm_fb_dma_sync_non_coherent(&priv->drm, oldstate, newstate);
672 
673 		crtc_state = newstate->crtc->state;
674 		plane_id = !!(priv->soc_info->has_osd && plane != &priv->f0);
675 
676 		addr = drm_fb_dma_get_gem_addr(newstate->fb, newstate, 0);
677 		width = newstate->src_w >> 16;
678 		height = newstate->src_h >> 16;
679 		cpp = newstate->fb->format->cpp[0];
680 
681 		priv_state = ingenic_drm_get_new_priv_state(priv, state);
682 		next_id = (priv_state && priv_state->use_palette) ? HWDESC_PALETTE : plane_id;
683 
684 		hwdesc = &priv->dma_hwdescs->hwdesc[plane_id];
685 		hwdesc->addr = addr;
686 		hwdesc->cmd = JZ_LCD_CMD_EOF_IRQ | (width * height * cpp / 4);
687 		hwdesc->next = dma_hwdesc_addr(priv, next_id);
688 
689 		if (priv->soc_info->use_extended_hwdesc) {
690 			hwdesc->cmd |= JZ_LCD_CMD_FRM_ENABLE;
691 
692 			/* Extended 8-byte descriptor */
693 			hwdesc->cpos = 0;
694 			hwdesc->offsize = 0;
695 			hwdesc->pagewidth = 0;
696 
697 			switch (newstate->fb->format->format) {
698 			case DRM_FORMAT_XRGB1555:
699 				hwdesc->cpos |= JZ_LCD_CPOS_RGB555;
700 				fallthrough;
701 			case DRM_FORMAT_RGB565:
702 				hwdesc->cpos |= JZ_LCD_CPOS_BPP_15_16;
703 				break;
704 			case DRM_FORMAT_XRGB8888:
705 				hwdesc->cpos |= JZ_LCD_CPOS_BPP_18_24;
706 				break;
707 			}
708 			hwdesc->cpos |= (JZ_LCD_CPOS_COEFFICIENT_1 <<
709 					 JZ_LCD_CPOS_COEFFICIENT_OFFSET);
710 			hwdesc->dessize =
711 				(0xff << JZ_LCD_DESSIZE_ALPHA_OFFSET) |
712 				FIELD_PREP(JZ_LCD_DESSIZE_HEIGHT_MASK, height - 1) |
713 				FIELD_PREP(JZ_LCD_DESSIZE_WIDTH_MASK, width - 1);
714 		}
715 
716 		if (drm_atomic_crtc_needs_modeset(crtc_state)) {
717 			fourcc = newstate->fb->format->format;
718 
719 			ingenic_drm_plane_config(priv->dev, plane, fourcc);
720 
721 			crtc_state->color_mgmt_changed = fourcc == DRM_FORMAT_C8;
722 		}
723 
724 		if (crtc_state->color_mgmt_changed)
725 			ingenic_drm_update_palette(priv, crtc_state->gamma_lut->data);
726 	}
727 }
728 
729 static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder,
730 						struct drm_crtc_state *crtc_state,
731 						struct drm_connector_state *conn_state)
732 {
733 	struct ingenic_drm *priv = drm_device_get_priv(encoder->dev);
734 	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
735 	struct ingenic_drm_bridge *bridge = to_ingenic_drm_bridge(encoder);
736 	unsigned int cfg, rgbcfg = 0;
737 
738 	priv->panel_is_sharp = bridge->bus_cfg.flags & DRM_BUS_FLAG_SHARP_SIGNALS;
739 
740 	if (priv->panel_is_sharp) {
741 		cfg = JZ_LCD_CFG_MODE_SPECIAL_TFT_1 | JZ_LCD_CFG_REV_POLARITY;
742 	} else {
743 		cfg = JZ_LCD_CFG_PS_DISABLE | JZ_LCD_CFG_CLS_DISABLE
744 		    | JZ_LCD_CFG_SPL_DISABLE | JZ_LCD_CFG_REV_DISABLE;
745 	}
746 
747 	if (priv->soc_info->use_extended_hwdesc)
748 		cfg |= JZ_LCD_CFG_DESCRIPTOR_8;
749 
750 	if (mode->flags & DRM_MODE_FLAG_NHSYNC)
751 		cfg |= JZ_LCD_CFG_HSYNC_ACTIVE_LOW;
752 	if (mode->flags & DRM_MODE_FLAG_NVSYNC)
753 		cfg |= JZ_LCD_CFG_VSYNC_ACTIVE_LOW;
754 	if (bridge->bus_cfg.flags & DRM_BUS_FLAG_DE_LOW)
755 		cfg |= JZ_LCD_CFG_DE_ACTIVE_LOW;
756 	if (bridge->bus_cfg.flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE)
757 		cfg |= JZ_LCD_CFG_PCLK_FALLING_EDGE;
758 
759 	if (!priv->panel_is_sharp) {
760 		if (conn_state->connector->connector_type == DRM_MODE_CONNECTOR_TV) {
761 			if (mode->flags & DRM_MODE_FLAG_INTERLACE)
762 				cfg |= JZ_LCD_CFG_MODE_TV_OUT_I;
763 			else
764 				cfg |= JZ_LCD_CFG_MODE_TV_OUT_P;
765 		} else {
766 			switch (bridge->bus_cfg.format) {
767 			case MEDIA_BUS_FMT_RGB565_1X16:
768 				cfg |= JZ_LCD_CFG_MODE_GENERIC_16BIT;
769 				break;
770 			case MEDIA_BUS_FMT_RGB666_1X18:
771 				cfg |= JZ_LCD_CFG_MODE_GENERIC_18BIT;
772 				break;
773 			case MEDIA_BUS_FMT_RGB888_1X24:
774 				cfg |= JZ_LCD_CFG_MODE_GENERIC_24BIT;
775 				break;
776 			case MEDIA_BUS_FMT_RGB888_3X8_DELTA:
777 				rgbcfg = JZ_LCD_RGBC_EVEN_GBR | JZ_LCD_RGBC_ODD_RGB;
778 				fallthrough;
779 			case MEDIA_BUS_FMT_RGB888_3X8:
780 				cfg |= JZ_LCD_CFG_MODE_8BIT_SERIAL;
781 				break;
782 			default:
783 				break;
784 			}
785 		}
786 	}
787 
788 	regmap_write(priv->map, JZ_REG_LCD_CFG, cfg);
789 	regmap_write(priv->map, JZ_REG_LCD_RGBC, rgbcfg);
790 }
791 
792 static int ingenic_drm_bridge_attach(struct drm_bridge *bridge,
793 				     enum drm_bridge_attach_flags flags)
794 {
795 	struct ingenic_drm_bridge *ib = to_ingenic_drm_bridge(bridge->encoder);
796 
797 	return drm_bridge_attach(bridge->encoder, ib->next_bridge,
798 				 &ib->bridge, flags);
799 }
800 
801 static int ingenic_drm_bridge_atomic_check(struct drm_bridge *bridge,
802 					   struct drm_bridge_state *bridge_state,
803 					   struct drm_crtc_state *crtc_state,
804 					   struct drm_connector_state *conn_state)
805 {
806 	struct drm_display_mode *mode = &crtc_state->adjusted_mode;
807 	struct ingenic_drm_bridge *ib = to_ingenic_drm_bridge(bridge->encoder);
808 
809 	ib->bus_cfg = bridge_state->output_bus_cfg;
810 
811 	if (conn_state->connector->connector_type == DRM_MODE_CONNECTOR_TV)
812 		return 0;
813 
814 	switch (bridge_state->output_bus_cfg.format) {
815 	case MEDIA_BUS_FMT_RGB888_3X8:
816 	case MEDIA_BUS_FMT_RGB888_3X8_DELTA:
817 		/*
818 		 * The LCD controller expects timing values in dot-clock ticks,
819 		 * which is 3x the timing values in pixels when using a 3x8-bit
820 		 * display; but it will count the display area size in pixels
821 		 * either way. Go figure.
822 		 */
823 		mode->crtc_clock = mode->clock * 3;
824 		mode->crtc_hsync_start = mode->hsync_start * 3 - mode->hdisplay * 2;
825 		mode->crtc_hsync_end = mode->hsync_end * 3 - mode->hdisplay * 2;
826 		mode->crtc_hdisplay = mode->hdisplay;
827 		mode->crtc_htotal = mode->htotal * 3 - mode->hdisplay * 2;
828 		return 0;
829 	case MEDIA_BUS_FMT_RGB565_1X16:
830 	case MEDIA_BUS_FMT_RGB666_1X18:
831 	case MEDIA_BUS_FMT_RGB888_1X24:
832 		return 0;
833 	default:
834 		return -EINVAL;
835 	}
836 }
837 
838 static u32 *
839 ingenic_drm_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
840 					     struct drm_bridge_state *bridge_state,
841 					     struct drm_crtc_state *crtc_state,
842 					     struct drm_connector_state *conn_state,
843 					     u32 output_fmt,
844 					     unsigned int *num_input_fmts)
845 {
846 	switch (output_fmt) {
847 	case MEDIA_BUS_FMT_RGB888_1X24:
848 	case MEDIA_BUS_FMT_RGB666_1X18:
849 	case MEDIA_BUS_FMT_RGB565_1X16:
850 	case MEDIA_BUS_FMT_RGB888_3X8:
851 	case MEDIA_BUS_FMT_RGB888_3X8_DELTA:
852 		break;
853 	default:
854 		*num_input_fmts = 0;
855 		return NULL;
856 	}
857 
858 	return drm_atomic_helper_bridge_propagate_bus_fmt(bridge, bridge_state,
859 							  crtc_state, conn_state,
860 							  output_fmt,
861 							  num_input_fmts);
862 }
863 
864 static irqreturn_t ingenic_drm_irq_handler(int irq, void *arg)
865 {
866 	struct ingenic_drm *priv = drm_device_get_priv(arg);
867 	unsigned int state;
868 
869 	regmap_read(priv->map, JZ_REG_LCD_STATE, &state);
870 
871 	regmap_update_bits(priv->map, JZ_REG_LCD_STATE,
872 			   JZ_LCD_STATE_EOF_IRQ, 0);
873 
874 	if (state & JZ_LCD_STATE_EOF_IRQ)
875 		drm_crtc_handle_vblank(&priv->crtc);
876 
877 	return IRQ_HANDLED;
878 }
879 
880 static int ingenic_drm_enable_vblank(struct drm_crtc *crtc)
881 {
882 	struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
883 
884 	if (priv->no_vblank)
885 		return -EINVAL;
886 
887 	regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
888 			   JZ_LCD_CTRL_EOF_IRQ, JZ_LCD_CTRL_EOF_IRQ);
889 
890 	return 0;
891 }
892 
893 static void ingenic_drm_disable_vblank(struct drm_crtc *crtc)
894 {
895 	struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
896 
897 	regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_EOF_IRQ, 0);
898 }
899 
900 static struct drm_framebuffer *
901 ingenic_drm_gem_fb_create(struct drm_device *drm, struct drm_file *file,
902 			  const struct drm_mode_fb_cmd2 *mode_cmd)
903 {
904 	struct ingenic_drm *priv = drm_device_get_priv(drm);
905 
906 	if (priv->soc_info->map_noncoherent)
907 		return drm_gem_fb_create_with_dirty(drm, file, mode_cmd);
908 
909 	return drm_gem_fb_create(drm, file, mode_cmd);
910 }
911 
912 static struct drm_gem_object *
913 ingenic_drm_gem_create_object(struct drm_device *drm, size_t size)
914 {
915 	struct ingenic_drm *priv = drm_device_get_priv(drm);
916 	struct drm_gem_dma_object *obj;
917 
918 	obj = kzalloc(sizeof(*obj), GFP_KERNEL);
919 	if (!obj)
920 		return ERR_PTR(-ENOMEM);
921 
922 	obj->map_noncoherent = priv->soc_info->map_noncoherent;
923 
924 	return &obj->base;
925 }
926 
927 static struct drm_private_state *
928 ingenic_drm_duplicate_state(struct drm_private_obj *obj)
929 {
930 	struct ingenic_drm_private_state *state = to_ingenic_drm_priv_state(obj->state);
931 
932 	state = kmemdup(state, sizeof(*state), GFP_KERNEL);
933 	if (!state)
934 		return NULL;
935 
936 	__drm_atomic_helper_private_obj_duplicate_state(obj, &state->base);
937 
938 	return &state->base;
939 }
940 
941 static void ingenic_drm_destroy_state(struct drm_private_obj *obj,
942 				      struct drm_private_state *state)
943 {
944 	struct ingenic_drm_private_state *priv_state = to_ingenic_drm_priv_state(state);
945 
946 	kfree(priv_state);
947 }
948 
949 DEFINE_DRM_GEM_DMA_FOPS(ingenic_drm_fops);
950 
951 static const struct drm_driver ingenic_drm_driver_data = {
952 	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
953 	.name			= "ingenic-drm",
954 	.desc			= "DRM module for Ingenic SoCs",
955 	.date			= "20200716",
956 	.major			= 1,
957 	.minor			= 1,
958 	.patchlevel		= 0,
959 
960 	.fops			= &ingenic_drm_fops,
961 	.gem_create_object	= ingenic_drm_gem_create_object,
962 	DRM_GEM_DMA_DRIVER_OPS,
963 };
964 
965 static const struct drm_plane_funcs ingenic_drm_primary_plane_funcs = {
966 	.update_plane		= drm_atomic_helper_update_plane,
967 	.disable_plane		= drm_atomic_helper_disable_plane,
968 	.reset			= drm_atomic_helper_plane_reset,
969 	.destroy		= drm_plane_cleanup,
970 
971 	.atomic_duplicate_state	= drm_atomic_helper_plane_duplicate_state,
972 	.atomic_destroy_state	= drm_atomic_helper_plane_destroy_state,
973 };
974 
975 static const struct drm_crtc_funcs ingenic_drm_crtc_funcs = {
976 	.set_config		= drm_atomic_helper_set_config,
977 	.page_flip		= drm_atomic_helper_page_flip,
978 	.reset			= drm_atomic_helper_crtc_reset,
979 	.destroy		= drm_crtc_cleanup,
980 
981 	.atomic_duplicate_state	= drm_atomic_helper_crtc_duplicate_state,
982 	.atomic_destroy_state	= drm_atomic_helper_crtc_destroy_state,
983 
984 	.enable_vblank		= ingenic_drm_enable_vblank,
985 	.disable_vblank		= ingenic_drm_disable_vblank,
986 };
987 
988 static const struct drm_plane_helper_funcs ingenic_drm_plane_helper_funcs = {
989 	.atomic_update		= ingenic_drm_plane_atomic_update,
990 	.atomic_check		= ingenic_drm_plane_atomic_check,
991 	.atomic_disable		= ingenic_drm_plane_atomic_disable,
992 };
993 
994 static const struct drm_crtc_helper_funcs ingenic_drm_crtc_helper_funcs = {
995 	.atomic_enable		= ingenic_drm_crtc_atomic_enable,
996 	.atomic_disable		= ingenic_drm_crtc_atomic_disable,
997 	.atomic_begin		= ingenic_drm_crtc_atomic_begin,
998 	.atomic_flush		= ingenic_drm_crtc_atomic_flush,
999 	.atomic_check		= ingenic_drm_crtc_atomic_check,
1000 	.mode_valid		= ingenic_drm_crtc_mode_valid,
1001 };
1002 
1003 static const struct drm_encoder_helper_funcs ingenic_drm_encoder_helper_funcs = {
1004 	.atomic_mode_set        = ingenic_drm_encoder_atomic_mode_set,
1005 };
1006 
1007 static const struct drm_bridge_funcs ingenic_drm_bridge_funcs = {
1008 	.attach			= ingenic_drm_bridge_attach,
1009 	.atomic_enable		= ingenic_drm_bridge_atomic_enable,
1010 	.atomic_disable		= ingenic_drm_bridge_atomic_disable,
1011 	.atomic_check		= ingenic_drm_bridge_atomic_check,
1012 	.atomic_reset		= drm_atomic_helper_bridge_reset,
1013 	.atomic_duplicate_state	= drm_atomic_helper_bridge_duplicate_state,
1014 	.atomic_destroy_state	= drm_atomic_helper_bridge_destroy_state,
1015 	.atomic_get_input_bus_fmts = ingenic_drm_bridge_atomic_get_input_bus_fmts,
1016 };
1017 
1018 static const struct drm_mode_config_funcs ingenic_drm_mode_config_funcs = {
1019 	.fb_create		= ingenic_drm_gem_fb_create,
1020 	.atomic_check		= drm_atomic_helper_check,
1021 	.atomic_commit		= drm_atomic_helper_commit,
1022 };
1023 
1024 static struct drm_mode_config_helper_funcs ingenic_drm_mode_config_helpers = {
1025 	.atomic_commit_tail = drm_atomic_helper_commit_tail,
1026 };
1027 
1028 static const struct drm_private_state_funcs ingenic_drm_private_state_funcs = {
1029 	.atomic_duplicate_state = ingenic_drm_duplicate_state,
1030 	.atomic_destroy_state = ingenic_drm_destroy_state,
1031 };
1032 
1033 static void ingenic_drm_unbind_all(void *d)
1034 {
1035 	struct ingenic_drm *priv = d;
1036 
1037 	component_unbind_all(priv->dev, &priv->drm);
1038 }
1039 
1040 static void __maybe_unused ingenic_drm_release_rmem(void *d)
1041 {
1042 	of_reserved_mem_device_release(d);
1043 }
1044 
1045 static void ingenic_drm_configure_hwdesc(struct ingenic_drm *priv,
1046 					 unsigned int hwdesc,
1047 					 unsigned int next_hwdesc, u32 id)
1048 {
1049 	struct ingenic_dma_hwdesc *desc = &priv->dma_hwdescs->hwdesc[hwdesc];
1050 
1051 	desc->next = dma_hwdesc_addr(priv, next_hwdesc);
1052 	desc->id = id;
1053 }
1054 
1055 static void ingenic_drm_configure_hwdesc_palette(struct ingenic_drm *priv)
1056 {
1057 	struct ingenic_dma_hwdesc *desc;
1058 
1059 	ingenic_drm_configure_hwdesc(priv, HWDESC_PALETTE, 0, 0xc0);
1060 
1061 	desc = &priv->dma_hwdescs->hwdesc[HWDESC_PALETTE];
1062 	desc->addr = priv->dma_hwdescs_phys
1063 		+ offsetof(struct ingenic_dma_hwdescs, palette);
1064 	desc->cmd = JZ_LCD_CMD_ENABLE_PAL
1065 		| (sizeof(priv->dma_hwdescs->palette) / 4);
1066 }
1067 
1068 static void ingenic_drm_configure_hwdesc_plane(struct ingenic_drm *priv,
1069 					       unsigned int plane)
1070 {
1071 	ingenic_drm_configure_hwdesc(priv, plane, plane, 0xf0 | plane);
1072 }
1073 
1074 static void ingenic_drm_atomic_private_obj_fini(struct drm_device *drm, void *private_obj)
1075 {
1076 	drm_atomic_private_obj_fini(private_obj);
1077 }
1078 
1079 static int ingenic_drm_bind(struct device *dev, bool has_components)
1080 {
1081 	struct platform_device *pdev = to_platform_device(dev);
1082 	struct ingenic_drm_private_state *private_state;
1083 	const struct jz_soc_info *soc_info;
1084 	struct ingenic_drm *priv;
1085 	struct clk *parent_clk;
1086 	struct drm_plane *primary;
1087 	struct drm_bridge *bridge;
1088 	struct drm_panel *panel;
1089 	struct drm_connector *connector;
1090 	struct drm_encoder *encoder;
1091 	struct ingenic_drm_bridge *ib;
1092 	struct drm_device *drm;
1093 	void __iomem *base;
1094 	struct resource *res;
1095 	struct regmap_config regmap_config;
1096 	long parent_rate;
1097 	unsigned int i, clone_mask = 0;
1098 	int ret, irq;
1099 	u32 osdc = 0;
1100 
1101 	soc_info = of_device_get_match_data(dev);
1102 	if (!soc_info) {
1103 		dev_err(dev, "Missing platform data\n");
1104 		return -EINVAL;
1105 	}
1106 
1107 	if (IS_ENABLED(CONFIG_OF_RESERVED_MEM)) {
1108 		ret = of_reserved_mem_device_init(dev);
1109 
1110 		if (ret && ret != -ENODEV)
1111 			dev_warn(dev, "Failed to get reserved memory: %d\n", ret);
1112 
1113 		if (!ret) {
1114 			ret = devm_add_action_or_reset(dev, ingenic_drm_release_rmem, dev);
1115 			if (ret)
1116 				return ret;
1117 		}
1118 	}
1119 
1120 	priv = devm_drm_dev_alloc(dev, &ingenic_drm_driver_data,
1121 				  struct ingenic_drm, drm);
1122 	if (IS_ERR(priv))
1123 		return PTR_ERR(priv);
1124 
1125 	priv->soc_info = soc_info;
1126 	priv->dev = dev;
1127 	drm = &priv->drm;
1128 
1129 	platform_set_drvdata(pdev, priv);
1130 
1131 	ret = drmm_mode_config_init(drm);
1132 	if (ret)
1133 		return ret;
1134 
1135 	drm->mode_config.min_width = 0;
1136 	drm->mode_config.min_height = 0;
1137 	drm->mode_config.max_width = soc_info->max_width;
1138 	drm->mode_config.max_height = 4095;
1139 	drm->mode_config.funcs = &ingenic_drm_mode_config_funcs;
1140 	drm->mode_config.helper_private = &ingenic_drm_mode_config_helpers;
1141 
1142 	base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
1143 	if (IS_ERR(base)) {
1144 		dev_err(dev, "Failed to get memory resource\n");
1145 		return PTR_ERR(base);
1146 	}
1147 
1148 	regmap_config = ingenic_drm_regmap_config;
1149 	regmap_config.max_register = res->end - res->start;
1150 	priv->map = devm_regmap_init_mmio(dev, base,
1151 					  &regmap_config);
1152 	if (IS_ERR(priv->map)) {
1153 		dev_err(dev, "Failed to create regmap\n");
1154 		return PTR_ERR(priv->map);
1155 	}
1156 
1157 	irq = platform_get_irq(pdev, 0);
1158 	if (irq < 0)
1159 		return irq;
1160 
1161 	if (soc_info->needs_dev_clk) {
1162 		priv->lcd_clk = devm_clk_get(dev, "lcd");
1163 		if (IS_ERR(priv->lcd_clk)) {
1164 			dev_err(dev, "Failed to get lcd clock\n");
1165 			return PTR_ERR(priv->lcd_clk);
1166 		}
1167 	}
1168 
1169 	priv->pix_clk = devm_clk_get(dev, "lcd_pclk");
1170 	if (IS_ERR(priv->pix_clk)) {
1171 		dev_err(dev, "Failed to get pixel clock\n");
1172 		return PTR_ERR(priv->pix_clk);
1173 	}
1174 
1175 	priv->dma_hwdescs = dmam_alloc_coherent(dev,
1176 						sizeof(*priv->dma_hwdescs),
1177 						&priv->dma_hwdescs_phys,
1178 						GFP_KERNEL);
1179 	if (!priv->dma_hwdescs)
1180 		return -ENOMEM;
1181 
1182 	/* Configure DMA hwdesc for foreground0 plane */
1183 	ingenic_drm_configure_hwdesc_plane(priv, 0);
1184 
1185 	/* Configure DMA hwdesc for foreground1 plane */
1186 	ingenic_drm_configure_hwdesc_plane(priv, 1);
1187 
1188 	/* Configure DMA hwdesc for palette */
1189 	ingenic_drm_configure_hwdesc_palette(priv);
1190 
1191 	primary = priv->soc_info->has_osd ? &priv->f1 : &priv->f0;
1192 
1193 	drm_plane_helper_add(primary, &ingenic_drm_plane_helper_funcs);
1194 
1195 	ret = drm_universal_plane_init(drm, primary, 1,
1196 				       &ingenic_drm_primary_plane_funcs,
1197 				       priv->soc_info->formats_f1,
1198 				       priv->soc_info->num_formats_f1,
1199 				       NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
1200 	if (ret) {
1201 		dev_err(dev, "Failed to register plane: %i\n", ret);
1202 		return ret;
1203 	}
1204 
1205 	if (soc_info->map_noncoherent)
1206 		drm_plane_enable_fb_damage_clips(&priv->f1);
1207 
1208 	drm_crtc_helper_add(&priv->crtc, &ingenic_drm_crtc_helper_funcs);
1209 
1210 	ret = drm_crtc_init_with_planes(drm, &priv->crtc, primary,
1211 					NULL, &ingenic_drm_crtc_funcs, NULL);
1212 	if (ret) {
1213 		dev_err(dev, "Failed to init CRTC: %i\n", ret);
1214 		return ret;
1215 	}
1216 
1217 	drm_crtc_enable_color_mgmt(&priv->crtc, 0, false,
1218 				   ARRAY_SIZE(priv->dma_hwdescs->palette));
1219 
1220 	if (soc_info->has_osd) {
1221 		drm_plane_helper_add(&priv->f0,
1222 				     &ingenic_drm_plane_helper_funcs);
1223 
1224 		ret = drm_universal_plane_init(drm, &priv->f0, 1,
1225 					       &ingenic_drm_primary_plane_funcs,
1226 					       priv->soc_info->formats_f0,
1227 					       priv->soc_info->num_formats_f0,
1228 					       NULL, DRM_PLANE_TYPE_OVERLAY,
1229 					       NULL);
1230 		if (ret) {
1231 			dev_err(dev, "Failed to register overlay plane: %i\n",
1232 				ret);
1233 			return ret;
1234 		}
1235 
1236 		if (soc_info->map_noncoherent)
1237 			drm_plane_enable_fb_damage_clips(&priv->f0);
1238 
1239 		if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU) && has_components) {
1240 			ret = component_bind_all(dev, drm);
1241 			if (ret) {
1242 				if (ret != -EPROBE_DEFER)
1243 					dev_err(dev, "Failed to bind components: %i\n", ret);
1244 				return ret;
1245 			}
1246 
1247 			ret = devm_add_action_or_reset(dev, ingenic_drm_unbind_all, priv);
1248 			if (ret)
1249 				return ret;
1250 
1251 			priv->ipu_plane = drm_plane_from_index(drm, 2);
1252 			if (!priv->ipu_plane) {
1253 				dev_err(dev, "Failed to retrieve IPU plane\n");
1254 				return -EINVAL;
1255 			}
1256 		}
1257 	}
1258 
1259 	for (i = 0; ; i++) {
1260 		ret = drm_of_find_panel_or_bridge(dev->of_node, 0, i, &panel, &bridge);
1261 		if (ret) {
1262 			if (ret == -ENODEV)
1263 				break; /* we're done */
1264 			if (ret != -EPROBE_DEFER)
1265 				dev_err(dev, "Failed to get bridge handle\n");
1266 			return ret;
1267 		}
1268 
1269 		if (panel)
1270 			bridge = devm_drm_panel_bridge_add_typed(dev, panel,
1271 								 DRM_MODE_CONNECTOR_DPI);
1272 
1273 		ib = drmm_encoder_alloc(drm, struct ingenic_drm_bridge, encoder,
1274 					NULL, DRM_MODE_ENCODER_DPI, NULL);
1275 		if (IS_ERR(ib)) {
1276 			ret = PTR_ERR(ib);
1277 			dev_err(dev, "Failed to init encoder: %d\n", ret);
1278 			return ret;
1279 		}
1280 
1281 		encoder = &ib->encoder;
1282 		encoder->possible_crtcs = drm_crtc_mask(&priv->crtc);
1283 
1284 		drm_encoder_helper_add(encoder, &ingenic_drm_encoder_helper_funcs);
1285 
1286 		ib->bridge.funcs = &ingenic_drm_bridge_funcs;
1287 		ib->next_bridge = bridge;
1288 
1289 		ret = drm_bridge_attach(encoder, &ib->bridge, NULL,
1290 					DRM_BRIDGE_ATTACH_NO_CONNECTOR);
1291 		if (ret) {
1292 			dev_err(dev, "Unable to attach bridge\n");
1293 			return ret;
1294 		}
1295 
1296 		connector = drm_bridge_connector_init(drm, encoder);
1297 		if (IS_ERR(connector)) {
1298 			dev_err(dev, "Unable to init connector\n");
1299 			return PTR_ERR(connector);
1300 		}
1301 
1302 		drm_connector_attach_encoder(connector, encoder);
1303 	}
1304 
1305 	drm_for_each_encoder(encoder, drm) {
1306 		clone_mask |= BIT(drm_encoder_index(encoder));
1307 	}
1308 
1309 	drm_for_each_encoder(encoder, drm) {
1310 		encoder->possible_clones = clone_mask;
1311 	}
1312 
1313 	ret = devm_request_irq(dev, irq, ingenic_drm_irq_handler, 0, drm->driver->name, drm);
1314 	if (ret) {
1315 		dev_err(dev, "Unable to install IRQ handler\n");
1316 		return ret;
1317 	}
1318 
1319 	ret = drm_vblank_init(drm, 1);
1320 	if (ret) {
1321 		dev_err(dev, "Failed calling drm_vblank_init()\n");
1322 		return ret;
1323 	}
1324 
1325 	drm_mode_config_reset(drm);
1326 
1327 	ret = clk_prepare_enable(priv->pix_clk);
1328 	if (ret) {
1329 		dev_err(dev, "Unable to start pixel clock\n");
1330 		return ret;
1331 	}
1332 
1333 	if (priv->lcd_clk) {
1334 		parent_clk = clk_get_parent(priv->lcd_clk);
1335 		parent_rate = clk_get_rate(parent_clk);
1336 
1337 		/* LCD Device clock must be 3x the pixel clock for STN panels,
1338 		 * or 1.5x the pixel clock for TFT panels. To avoid having to
1339 		 * check for the LCD device clock everytime we do a mode change,
1340 		 * we set the LCD device clock to the highest rate possible.
1341 		 */
1342 		ret = clk_set_rate(priv->lcd_clk, parent_rate);
1343 		if (ret) {
1344 			dev_err(dev, "Unable to set LCD clock rate\n");
1345 			goto err_pixclk_disable;
1346 		}
1347 
1348 		ret = clk_prepare_enable(priv->lcd_clk);
1349 		if (ret) {
1350 			dev_err(dev, "Unable to start lcd clock\n");
1351 			goto err_pixclk_disable;
1352 		}
1353 	}
1354 
1355 	/* Enable OSD if available */
1356 	if (soc_info->has_osd)
1357 		osdc |= JZ_LCD_OSDC_OSDEN;
1358 	if (soc_info->has_alpha)
1359 		osdc |= JZ_LCD_OSDC_ALPHAEN;
1360 	regmap_write(priv->map, JZ_REG_LCD_OSDC, osdc);
1361 
1362 	mutex_init(&priv->clk_mutex);
1363 	priv->clock_nb.notifier_call = ingenic_drm_update_pixclk;
1364 
1365 	parent_clk = clk_get_parent(priv->pix_clk);
1366 	ret = clk_notifier_register(parent_clk, &priv->clock_nb);
1367 	if (ret) {
1368 		dev_err(dev, "Unable to register clock notifier\n");
1369 		goto err_devclk_disable;
1370 	}
1371 
1372 	private_state = kzalloc(sizeof(*private_state), GFP_KERNEL);
1373 	if (!private_state) {
1374 		ret = -ENOMEM;
1375 		goto err_clk_notifier_unregister;
1376 	}
1377 
1378 	drm_atomic_private_obj_init(drm, &priv->private_obj, &private_state->base,
1379 				    &ingenic_drm_private_state_funcs);
1380 
1381 	ret = drmm_add_action_or_reset(drm, ingenic_drm_atomic_private_obj_fini,
1382 				       &priv->private_obj);
1383 	if (ret)
1384 		goto err_private_state_free;
1385 
1386 	ret = drm_dev_register(drm, 0);
1387 	if (ret) {
1388 		dev_err(dev, "Failed to register DRM driver\n");
1389 		goto err_clk_notifier_unregister;
1390 	}
1391 
1392 	drm_fbdev_generic_setup(drm, 32);
1393 
1394 	return 0;
1395 
1396 err_private_state_free:
1397 	kfree(private_state);
1398 err_clk_notifier_unregister:
1399 	clk_notifier_unregister(parent_clk, &priv->clock_nb);
1400 err_devclk_disable:
1401 	if (priv->lcd_clk)
1402 		clk_disable_unprepare(priv->lcd_clk);
1403 err_pixclk_disable:
1404 	clk_disable_unprepare(priv->pix_clk);
1405 	return ret;
1406 }
1407 
1408 static int ingenic_drm_bind_with_components(struct device *dev)
1409 {
1410 	return ingenic_drm_bind(dev, true);
1411 }
1412 
1413 static void ingenic_drm_unbind(struct device *dev)
1414 {
1415 	struct ingenic_drm *priv = dev_get_drvdata(dev);
1416 	struct clk *parent_clk = clk_get_parent(priv->pix_clk);
1417 
1418 	clk_notifier_unregister(parent_clk, &priv->clock_nb);
1419 	if (priv->lcd_clk)
1420 		clk_disable_unprepare(priv->lcd_clk);
1421 	clk_disable_unprepare(priv->pix_clk);
1422 
1423 	drm_dev_unregister(&priv->drm);
1424 	drm_atomic_helper_shutdown(&priv->drm);
1425 }
1426 
1427 static const struct component_master_ops ingenic_master_ops = {
1428 	.bind = ingenic_drm_bind_with_components,
1429 	.unbind = ingenic_drm_unbind,
1430 };
1431 
1432 static int ingenic_drm_probe(struct platform_device *pdev)
1433 {
1434 	struct device *dev = &pdev->dev;
1435 	struct component_match *match = NULL;
1436 	struct device_node *np;
1437 
1438 	if (!IS_ENABLED(CONFIG_DRM_INGENIC_IPU))
1439 		return ingenic_drm_bind(dev, false);
1440 
1441 	/* IPU is at port address 8 */
1442 	np = of_graph_get_remote_node(dev->of_node, 8, 0);
1443 	if (!np)
1444 		return ingenic_drm_bind(dev, false);
1445 
1446 	drm_of_component_match_add(dev, &match, component_compare_of, np);
1447 	of_node_put(np);
1448 
1449 	return component_master_add_with_match(dev, &ingenic_master_ops, match);
1450 }
1451 
1452 static int ingenic_drm_remove(struct platform_device *pdev)
1453 {
1454 	struct device *dev = &pdev->dev;
1455 
1456 	if (!IS_ENABLED(CONFIG_DRM_INGENIC_IPU))
1457 		ingenic_drm_unbind(dev);
1458 	else
1459 		component_master_del(dev, &ingenic_master_ops);
1460 
1461 	return 0;
1462 }
1463 
1464 static int ingenic_drm_suspend(struct device *dev)
1465 {
1466 	struct ingenic_drm *priv = dev_get_drvdata(dev);
1467 
1468 	return drm_mode_config_helper_suspend(&priv->drm);
1469 }
1470 
1471 static int ingenic_drm_resume(struct device *dev)
1472 {
1473 	struct ingenic_drm *priv = dev_get_drvdata(dev);
1474 
1475 	return drm_mode_config_helper_resume(&priv->drm);
1476 }
1477 
1478 static DEFINE_SIMPLE_DEV_PM_OPS(ingenic_drm_pm_ops,
1479 				ingenic_drm_suspend, ingenic_drm_resume);
1480 
1481 static const u32 jz4740_formats[] = {
1482 	DRM_FORMAT_XRGB1555,
1483 	DRM_FORMAT_RGB565,
1484 	DRM_FORMAT_XRGB8888,
1485 };
1486 
1487 static const u32 jz4725b_formats_f1[] = {
1488 	DRM_FORMAT_XRGB1555,
1489 	DRM_FORMAT_RGB565,
1490 	DRM_FORMAT_XRGB8888,
1491 };
1492 
1493 static const u32 jz4725b_formats_f0[] = {
1494 	DRM_FORMAT_C8,
1495 	DRM_FORMAT_XRGB1555,
1496 	DRM_FORMAT_RGB565,
1497 	DRM_FORMAT_XRGB8888,
1498 };
1499 
1500 static const u32 jz4770_formats_f1[] = {
1501 	DRM_FORMAT_XRGB1555,
1502 	DRM_FORMAT_RGB565,
1503 	DRM_FORMAT_RGB888,
1504 	DRM_FORMAT_XRGB8888,
1505 	DRM_FORMAT_XRGB2101010,
1506 };
1507 
1508 static const u32 jz4770_formats_f0[] = {
1509 	DRM_FORMAT_C8,
1510 	DRM_FORMAT_XRGB1555,
1511 	DRM_FORMAT_RGB565,
1512 	DRM_FORMAT_RGB888,
1513 	DRM_FORMAT_XRGB8888,
1514 	DRM_FORMAT_XRGB2101010,
1515 };
1516 
1517 static const struct jz_soc_info jz4740_soc_info = {
1518 	.needs_dev_clk = true,
1519 	.has_osd = false,
1520 	.map_noncoherent = false,
1521 	.max_width = 800,
1522 	.max_height = 600,
1523 	.max_burst = JZ_LCD_CTRL_BURST_16,
1524 	.formats_f1 = jz4740_formats,
1525 	.num_formats_f1 = ARRAY_SIZE(jz4740_formats),
1526 	/* JZ4740 has only one plane */
1527 };
1528 
1529 static const struct jz_soc_info jz4725b_soc_info = {
1530 	.needs_dev_clk = false,
1531 	.has_osd = true,
1532 	.map_noncoherent = false,
1533 	.max_width = 800,
1534 	.max_height = 600,
1535 	.max_burst = JZ_LCD_CTRL_BURST_16,
1536 	.formats_f1 = jz4725b_formats_f1,
1537 	.num_formats_f1 = ARRAY_SIZE(jz4725b_formats_f1),
1538 	.formats_f0 = jz4725b_formats_f0,
1539 	.num_formats_f0 = ARRAY_SIZE(jz4725b_formats_f0),
1540 };
1541 
1542 static const struct jz_soc_info jz4760_soc_info = {
1543 	.needs_dev_clk = false,
1544 	.has_osd = true,
1545 	.map_noncoherent = false,
1546 	.max_width = 1280,
1547 	.max_height = 720,
1548 	.max_burst = JZ_LCD_CTRL_BURST_32,
1549 	.formats_f1 = jz4770_formats_f1,
1550 	.num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
1551 	.formats_f0 = jz4770_formats_f0,
1552 	.num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
1553 };
1554 
1555 static const struct jz_soc_info jz4760b_soc_info = {
1556 	.needs_dev_clk = false,
1557 	.has_osd = true,
1558 	.map_noncoherent = false,
1559 	.max_width = 1280,
1560 	.max_height = 720,
1561 	.max_burst = JZ_LCD_CTRL_BURST_64,
1562 	.formats_f1 = jz4770_formats_f1,
1563 	.num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
1564 	.formats_f0 = jz4770_formats_f0,
1565 	.num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
1566 };
1567 
1568 static const struct jz_soc_info jz4770_soc_info = {
1569 	.needs_dev_clk = false,
1570 	.has_osd = true,
1571 	.map_noncoherent = true,
1572 	.max_width = 1280,
1573 	.max_height = 720,
1574 	.max_burst = JZ_LCD_CTRL_BURST_64,
1575 	.formats_f1 = jz4770_formats_f1,
1576 	.num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
1577 	.formats_f0 = jz4770_formats_f0,
1578 	.num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
1579 };
1580 
1581 static const struct jz_soc_info jz4780_soc_info = {
1582 	.needs_dev_clk = true,
1583 	.has_osd = true,
1584 	.has_alpha = true,
1585 	.use_extended_hwdesc = true,
1586 	.plane_f0_not_working = true,	/* REVISIT */
1587 	.max_width = 4096,
1588 	.max_height = 2048,
1589 	.max_burst = JZ_LCD_CTRL_BURST_64,
1590 	.formats_f1 = jz4770_formats_f1,
1591 	.num_formats_f1 = ARRAY_SIZE(jz4770_formats_f1),
1592 	.formats_f0 = jz4770_formats_f0,
1593 	.num_formats_f0 = ARRAY_SIZE(jz4770_formats_f0),
1594 };
1595 
1596 static const struct of_device_id ingenic_drm_of_match[] = {
1597 	{ .compatible = "ingenic,jz4740-lcd", .data = &jz4740_soc_info },
1598 	{ .compatible = "ingenic,jz4725b-lcd", .data = &jz4725b_soc_info },
1599 	{ .compatible = "ingenic,jz4760-lcd", .data = &jz4760_soc_info },
1600 	{ .compatible = "ingenic,jz4760b-lcd", .data = &jz4760b_soc_info },
1601 	{ .compatible = "ingenic,jz4770-lcd", .data = &jz4770_soc_info },
1602 	{ .compatible = "ingenic,jz4780-lcd", .data = &jz4780_soc_info },
1603 	{ /* sentinel */ },
1604 };
1605 MODULE_DEVICE_TABLE(of, ingenic_drm_of_match);
1606 
1607 static struct platform_driver ingenic_drm_driver = {
1608 	.driver = {
1609 		.name = "ingenic-drm",
1610 		.pm = pm_sleep_ptr(&ingenic_drm_pm_ops),
1611 		.of_match_table = of_match_ptr(ingenic_drm_of_match),
1612 	},
1613 	.probe = ingenic_drm_probe,
1614 	.remove = ingenic_drm_remove,
1615 };
1616 
1617 static int ingenic_drm_init(void)
1618 {
1619 	int err;
1620 
1621 	if (drm_firmware_drivers_only())
1622 		return -ENODEV;
1623 
1624 	if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU)) {
1625 		err = platform_driver_register(ingenic_ipu_driver_ptr);
1626 		if (err)
1627 			return err;
1628 	}
1629 
1630 	err = platform_driver_register(&ingenic_drm_driver);
1631 	if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU) && err)
1632 		platform_driver_unregister(ingenic_ipu_driver_ptr);
1633 
1634 	return err;
1635 }
1636 module_init(ingenic_drm_init);
1637 
1638 static void ingenic_drm_exit(void)
1639 {
1640 	platform_driver_unregister(&ingenic_drm_driver);
1641 
1642 	if (IS_ENABLED(CONFIG_DRM_INGENIC_IPU))
1643 		platform_driver_unregister(ingenic_ipu_driver_ptr);
1644 }
1645 module_exit(ingenic_drm_exit);
1646 
1647 MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
1648 MODULE_DESCRIPTION("DRM driver for the Ingenic SoCs\n");
1649 MODULE_LICENSE("GPL");
1650