This source file includes following definitions.
- ingenic_drm_writeable_reg
- drm_device_get_priv
- drm_crtc_get_priv
- drm_encoder_get_priv
- drm_plane_get_priv
- ingenic_drm_crtc_atomic_enable
- ingenic_drm_crtc_atomic_disable
- ingenic_drm_crtc_update_timings
- ingenic_drm_crtc_update_ctrl
- ingenic_drm_crtc_atomic_check
- ingenic_drm_crtc_atomic_flush
- ingenic_drm_plane_atomic_update
- ingenic_drm_encoder_atomic_mode_set
- ingenic_drm_encoder_atomic_check
- ingenic_drm_irq_handler
- ingenic_drm_release
- ingenic_drm_enable_vblank
- ingenic_drm_disable_vblank
- ingenic_drm_free_dma_hwdesc
- ingenic_drm_probe
- ingenic_drm_remove
1
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5
6
7 #include <linux/clk.h>
8 #include <linux/dma-mapping.h>
9 #include <linux/module.h>
10 #include <linux/of_device.h>
11 #include <linux/platform_device.h>
12 #include <linux/regmap.h>
13
14 #include <drm/drm_atomic.h>
15 #include <drm/drm_atomic_helper.h>
16 #include <drm/drm_crtc.h>
17 #include <drm/drm_crtc_helper.h>
18 #include <drm/drm_drv.h>
19 #include <drm/drm_gem_cma_helper.h>
20 #include <drm/drm_fb_cma_helper.h>
21 #include <drm/drm_fb_helper.h>
22 #include <drm/drm_fourcc.h>
23 #include <drm/drm_gem_framebuffer_helper.h>
24 #include <drm/drm_irq.h>
25 #include <drm/drm_of.h>
26 #include <drm/drm_panel.h>
27 #include <drm/drm_plane.h>
28 #include <drm/drm_plane_helper.h>
29 #include <drm/drm_probe_helper.h>
30 #include <drm/drm_vblank.h>
31
32 #define JZ_REG_LCD_CFG 0x00
33 #define JZ_REG_LCD_VSYNC 0x04
34 #define JZ_REG_LCD_HSYNC 0x08
35 #define JZ_REG_LCD_VAT 0x0C
36 #define JZ_REG_LCD_DAH 0x10
37 #define JZ_REG_LCD_DAV 0x14
38 #define JZ_REG_LCD_PS 0x18
39 #define JZ_REG_LCD_CLS 0x1C
40 #define JZ_REG_LCD_SPL 0x20
41 #define JZ_REG_LCD_REV 0x24
42 #define JZ_REG_LCD_CTRL 0x30
43 #define JZ_REG_LCD_STATE 0x34
44 #define JZ_REG_LCD_IID 0x38
45 #define JZ_REG_LCD_DA0 0x40
46 #define JZ_REG_LCD_SA0 0x44
47 #define JZ_REG_LCD_FID0 0x48
48 #define JZ_REG_LCD_CMD0 0x4C
49 #define JZ_REG_LCD_DA1 0x50
50 #define JZ_REG_LCD_SA1 0x54
51 #define JZ_REG_LCD_FID1 0x58
52 #define JZ_REG_LCD_CMD1 0x5C
53
54 #define JZ_LCD_CFG_SLCD BIT(31)
55 #define JZ_LCD_CFG_PS_DISABLE BIT(23)
56 #define JZ_LCD_CFG_CLS_DISABLE BIT(22)
57 #define JZ_LCD_CFG_SPL_DISABLE BIT(21)
58 #define JZ_LCD_CFG_REV_DISABLE BIT(20)
59 #define JZ_LCD_CFG_HSYNCM BIT(19)
60 #define JZ_LCD_CFG_PCLKM BIT(18)
61 #define JZ_LCD_CFG_INV BIT(17)
62 #define JZ_LCD_CFG_SYNC_DIR BIT(16)
63 #define JZ_LCD_CFG_PS_POLARITY BIT(15)
64 #define JZ_LCD_CFG_CLS_POLARITY BIT(14)
65 #define JZ_LCD_CFG_SPL_POLARITY BIT(13)
66 #define JZ_LCD_CFG_REV_POLARITY BIT(12)
67 #define JZ_LCD_CFG_HSYNC_ACTIVE_LOW BIT(11)
68 #define JZ_LCD_CFG_PCLK_FALLING_EDGE BIT(10)
69 #define JZ_LCD_CFG_DE_ACTIVE_LOW BIT(9)
70 #define JZ_LCD_CFG_VSYNC_ACTIVE_LOW BIT(8)
71 #define JZ_LCD_CFG_18_BIT BIT(7)
72 #define JZ_LCD_CFG_PDW (BIT(5) | BIT(4))
73
74 #define JZ_LCD_CFG_MODE_GENERIC_16BIT 0
75 #define JZ_LCD_CFG_MODE_GENERIC_18BIT BIT(7)
76 #define JZ_LCD_CFG_MODE_GENERIC_24BIT BIT(6)
77
78 #define JZ_LCD_CFG_MODE_SPECIAL_TFT_1 1
79 #define JZ_LCD_CFG_MODE_SPECIAL_TFT_2 2
80 #define JZ_LCD_CFG_MODE_SPECIAL_TFT_3 3
81
82 #define JZ_LCD_CFG_MODE_TV_OUT_P 4
83 #define JZ_LCD_CFG_MODE_TV_OUT_I 6
84
85 #define JZ_LCD_CFG_MODE_SINGLE_COLOR_STN 8
86 #define JZ_LCD_CFG_MODE_SINGLE_MONOCHROME_STN 9
87 #define JZ_LCD_CFG_MODE_DUAL_COLOR_STN 10
88 #define JZ_LCD_CFG_MODE_DUAL_MONOCHROME_STN 11
89
90 #define JZ_LCD_CFG_MODE_8BIT_SERIAL 12
91 #define JZ_LCD_CFG_MODE_LCM 13
92
93 #define JZ_LCD_VSYNC_VPS_OFFSET 16
94 #define JZ_LCD_VSYNC_VPE_OFFSET 0
95
96 #define JZ_LCD_HSYNC_HPS_OFFSET 16
97 #define JZ_LCD_HSYNC_HPE_OFFSET 0
98
99 #define JZ_LCD_VAT_HT_OFFSET 16
100 #define JZ_LCD_VAT_VT_OFFSET 0
101
102 #define JZ_LCD_DAH_HDS_OFFSET 16
103 #define JZ_LCD_DAH_HDE_OFFSET 0
104
105 #define JZ_LCD_DAV_VDS_OFFSET 16
106 #define JZ_LCD_DAV_VDE_OFFSET 0
107
108 #define JZ_LCD_CTRL_BURST_4 (0x0 << 28)
109 #define JZ_LCD_CTRL_BURST_8 (0x1 << 28)
110 #define JZ_LCD_CTRL_BURST_16 (0x2 << 28)
111 #define JZ_LCD_CTRL_RGB555 BIT(27)
112 #define JZ_LCD_CTRL_OFUP BIT(26)
113 #define JZ_LCD_CTRL_FRC_GRAYSCALE_16 (0x0 << 24)
114 #define JZ_LCD_CTRL_FRC_GRAYSCALE_4 (0x1 << 24)
115 #define JZ_LCD_CTRL_FRC_GRAYSCALE_2 (0x2 << 24)
116 #define JZ_LCD_CTRL_PDD_MASK (0xff << 16)
117 #define JZ_LCD_CTRL_EOF_IRQ BIT(13)
118 #define JZ_LCD_CTRL_SOF_IRQ BIT(12)
119 #define JZ_LCD_CTRL_OFU_IRQ BIT(11)
120 #define JZ_LCD_CTRL_IFU0_IRQ BIT(10)
121 #define JZ_LCD_CTRL_IFU1_IRQ BIT(9)
122 #define JZ_LCD_CTRL_DD_IRQ BIT(8)
123 #define JZ_LCD_CTRL_QDD_IRQ BIT(7)
124 #define JZ_LCD_CTRL_REVERSE_ENDIAN BIT(6)
125 #define JZ_LCD_CTRL_LSB_FISRT BIT(5)
126 #define JZ_LCD_CTRL_DISABLE BIT(4)
127 #define JZ_LCD_CTRL_ENABLE BIT(3)
128 #define JZ_LCD_CTRL_BPP_1 0x0
129 #define JZ_LCD_CTRL_BPP_2 0x1
130 #define JZ_LCD_CTRL_BPP_4 0x2
131 #define JZ_LCD_CTRL_BPP_8 0x3
132 #define JZ_LCD_CTRL_BPP_15_16 0x4
133 #define JZ_LCD_CTRL_BPP_18_24 0x5
134 #define JZ_LCD_CTRL_BPP_MASK (JZ_LCD_CTRL_RGB555 | (0x7 << 0))
135
136 #define JZ_LCD_CMD_SOF_IRQ BIT(31)
137 #define JZ_LCD_CMD_EOF_IRQ BIT(30)
138 #define JZ_LCD_CMD_ENABLE_PAL BIT(28)
139
140 #define JZ_LCD_SYNC_MASK 0x3ff
141
142 #define JZ_LCD_STATE_EOF_IRQ BIT(5)
143 #define JZ_LCD_STATE_SOF_IRQ BIT(4)
144 #define JZ_LCD_STATE_DISABLED BIT(0)
145
146 struct ingenic_dma_hwdesc {
147 u32 next;
148 u32 addr;
149 u32 id;
150 u32 cmd;
151 } __packed;
152
153 struct jz_soc_info {
154 bool needs_dev_clk;
155 };
156
157 struct ingenic_drm {
158 struct drm_device drm;
159 struct drm_plane primary;
160 struct drm_crtc crtc;
161 struct drm_encoder encoder;
162
163 struct device *dev;
164 struct regmap *map;
165 struct clk *lcd_clk, *pix_clk;
166
167 struct ingenic_dma_hwdesc *dma_hwdesc;
168 dma_addr_t dma_hwdesc_phys;
169
170 bool panel_is_sharp;
171 };
172
173 static const u32 ingenic_drm_primary_formats[] = {
174 DRM_FORMAT_XRGB1555,
175 DRM_FORMAT_RGB565,
176 DRM_FORMAT_XRGB8888,
177 };
178
179 static bool ingenic_drm_writeable_reg(struct device *dev, unsigned int reg)
180 {
181 switch (reg) {
182 case JZ_REG_LCD_IID:
183 case JZ_REG_LCD_SA0:
184 case JZ_REG_LCD_FID0:
185 case JZ_REG_LCD_CMD0:
186 case JZ_REG_LCD_SA1:
187 case JZ_REG_LCD_FID1:
188 case JZ_REG_LCD_CMD1:
189 return false;
190 default:
191 return true;
192 }
193 }
194
195 static const struct regmap_config ingenic_drm_regmap_config = {
196 .reg_bits = 32,
197 .val_bits = 32,
198 .reg_stride = 4,
199
200 .max_register = JZ_REG_LCD_CMD1,
201 .writeable_reg = ingenic_drm_writeable_reg,
202 };
203
204 static inline struct ingenic_drm *drm_device_get_priv(struct drm_device *drm)
205 {
206 return container_of(drm, struct ingenic_drm, drm);
207 }
208
209 static inline struct ingenic_drm *drm_crtc_get_priv(struct drm_crtc *crtc)
210 {
211 return container_of(crtc, struct ingenic_drm, crtc);
212 }
213
214 static inline struct ingenic_drm *
215 drm_encoder_get_priv(struct drm_encoder *encoder)
216 {
217 return container_of(encoder, struct ingenic_drm, encoder);
218 }
219
220 static inline struct ingenic_drm *drm_plane_get_priv(struct drm_plane *plane)
221 {
222 return container_of(plane, struct ingenic_drm, primary);
223 }
224
225 static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc,
226 struct drm_crtc_state *state)
227 {
228 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
229
230 regmap_write(priv->map, JZ_REG_LCD_STATE, 0);
231
232 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
233 JZ_LCD_CTRL_ENABLE | JZ_LCD_CTRL_DISABLE,
234 JZ_LCD_CTRL_ENABLE);
235
236 drm_crtc_vblank_on(crtc);
237 }
238
239 static void ingenic_drm_crtc_atomic_disable(struct drm_crtc *crtc,
240 struct drm_crtc_state *state)
241 {
242 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
243 unsigned int var;
244
245 drm_crtc_vblank_off(crtc);
246
247 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
248 JZ_LCD_CTRL_DISABLE, JZ_LCD_CTRL_DISABLE);
249
250 regmap_read_poll_timeout(priv->map, JZ_REG_LCD_STATE, var,
251 var & JZ_LCD_STATE_DISABLED,
252 1000, 0);
253 }
254
255 static void ingenic_drm_crtc_update_timings(struct ingenic_drm *priv,
256 struct drm_display_mode *mode)
257 {
258 unsigned int vpe, vds, vde, vt, hpe, hds, hde, ht;
259
260 vpe = mode->vsync_end - mode->vsync_start;
261 vds = mode->vtotal - mode->vsync_start;
262 vde = vds + mode->vdisplay;
263 vt = vde + mode->vsync_start - mode->vdisplay;
264
265 hpe = mode->hsync_end - mode->hsync_start;
266 hds = mode->htotal - mode->hsync_start;
267 hde = hds + mode->hdisplay;
268 ht = hde + mode->hsync_start - mode->hdisplay;
269
270 regmap_write(priv->map, JZ_REG_LCD_VSYNC,
271 0 << JZ_LCD_VSYNC_VPS_OFFSET |
272 vpe << JZ_LCD_VSYNC_VPE_OFFSET);
273
274 regmap_write(priv->map, JZ_REG_LCD_HSYNC,
275 0 << JZ_LCD_HSYNC_HPS_OFFSET |
276 hpe << JZ_LCD_HSYNC_HPE_OFFSET);
277
278 regmap_write(priv->map, JZ_REG_LCD_VAT,
279 ht << JZ_LCD_VAT_HT_OFFSET |
280 vt << JZ_LCD_VAT_VT_OFFSET);
281
282 regmap_write(priv->map, JZ_REG_LCD_DAH,
283 hds << JZ_LCD_DAH_HDS_OFFSET |
284 hde << JZ_LCD_DAH_HDE_OFFSET);
285 regmap_write(priv->map, JZ_REG_LCD_DAV,
286 vds << JZ_LCD_DAV_VDS_OFFSET |
287 vde << JZ_LCD_DAV_VDE_OFFSET);
288
289 if (priv->panel_is_sharp) {
290 regmap_write(priv->map, JZ_REG_LCD_PS, hde << 16 | (hde + 1));
291 regmap_write(priv->map, JZ_REG_LCD_CLS, hde << 16 | (hde + 1));
292 regmap_write(priv->map, JZ_REG_LCD_SPL, hpe << 16 | (hpe + 1));
293 regmap_write(priv->map, JZ_REG_LCD_REV, mode->htotal << 16);
294 }
295 }
296
297 static void ingenic_drm_crtc_update_ctrl(struct ingenic_drm *priv,
298 const struct drm_format_info *finfo)
299 {
300 unsigned int ctrl = JZ_LCD_CTRL_OFUP | JZ_LCD_CTRL_BURST_16;
301
302 switch (finfo->format) {
303 case DRM_FORMAT_XRGB1555:
304 ctrl |= JZ_LCD_CTRL_RGB555;
305
306 case DRM_FORMAT_RGB565:
307 ctrl |= JZ_LCD_CTRL_BPP_15_16;
308 break;
309 case DRM_FORMAT_XRGB8888:
310 ctrl |= JZ_LCD_CTRL_BPP_18_24;
311 break;
312 }
313
314 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
315 JZ_LCD_CTRL_OFUP | JZ_LCD_CTRL_BURST_16 |
316 JZ_LCD_CTRL_BPP_MASK, ctrl);
317 }
318
319 static int ingenic_drm_crtc_atomic_check(struct drm_crtc *crtc,
320 struct drm_crtc_state *state)
321 {
322 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
323 long rate;
324
325 if (!drm_atomic_crtc_needs_modeset(state))
326 return 0;
327
328 rate = clk_round_rate(priv->pix_clk,
329 state->adjusted_mode.clock * 1000);
330 if (rate < 0)
331 return rate;
332
333 return 0;
334 }
335
336 static void ingenic_drm_crtc_atomic_flush(struct drm_crtc *crtc,
337 struct drm_crtc_state *oldstate)
338 {
339 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
340 struct drm_crtc_state *state = crtc->state;
341 struct drm_pending_vblank_event *event = state->event;
342 struct drm_framebuffer *drm_fb = crtc->primary->state->fb;
343 const struct drm_format_info *finfo;
344
345 if (drm_atomic_crtc_needs_modeset(state)) {
346 finfo = drm_format_info(drm_fb->format->format);
347
348 ingenic_drm_crtc_update_timings(priv, &state->mode);
349 ingenic_drm_crtc_update_ctrl(priv, finfo);
350
351 clk_set_rate(priv->pix_clk, state->adjusted_mode.clock * 1000);
352
353 regmap_write(priv->map, JZ_REG_LCD_DA0, priv->dma_hwdesc->next);
354 }
355
356 if (event) {
357 state->event = NULL;
358
359 spin_lock_irq(&crtc->dev->event_lock);
360 if (drm_crtc_vblank_get(crtc) == 0)
361 drm_crtc_arm_vblank_event(crtc, event);
362 else
363 drm_crtc_send_vblank_event(crtc, event);
364 spin_unlock_irq(&crtc->dev->event_lock);
365 }
366 }
367
368 static void ingenic_drm_plane_atomic_update(struct drm_plane *plane,
369 struct drm_plane_state *oldstate)
370 {
371 struct ingenic_drm *priv = drm_plane_get_priv(plane);
372 struct drm_plane_state *state = plane->state;
373 unsigned int width, height, cpp;
374 dma_addr_t addr;
375
376 if (state && state->fb) {
377 addr = drm_fb_cma_get_gem_addr(state->fb, state, 0);
378 width = state->crtc->state->adjusted_mode.hdisplay;
379 height = state->crtc->state->adjusted_mode.vdisplay;
380 cpp = state->fb->format->cpp[plane->index];
381
382 priv->dma_hwdesc->addr = addr;
383 priv->dma_hwdesc->cmd = width * height * cpp / 4;
384 priv->dma_hwdesc->cmd |= JZ_LCD_CMD_EOF_IRQ;
385 }
386 }
387
388 static void ingenic_drm_encoder_atomic_mode_set(struct drm_encoder *encoder,
389 struct drm_crtc_state *crtc_state,
390 struct drm_connector_state *conn_state)
391 {
392 struct ingenic_drm *priv = drm_encoder_get_priv(encoder);
393 struct drm_display_mode *mode = &crtc_state->adjusted_mode;
394 struct drm_connector *conn = conn_state->connector;
395 struct drm_display_info *info = &conn->display_info;
396 unsigned int cfg;
397
398 priv->panel_is_sharp = info->bus_flags & DRM_BUS_FLAG_SHARP_SIGNALS;
399
400 if (priv->panel_is_sharp) {
401 cfg = JZ_LCD_CFG_MODE_SPECIAL_TFT_1 | JZ_LCD_CFG_REV_POLARITY;
402 } else {
403 cfg = JZ_LCD_CFG_PS_DISABLE | JZ_LCD_CFG_CLS_DISABLE
404 | JZ_LCD_CFG_SPL_DISABLE | JZ_LCD_CFG_REV_DISABLE;
405 }
406
407 if (mode->flags & DRM_MODE_FLAG_NHSYNC)
408 cfg |= JZ_LCD_CFG_HSYNC_ACTIVE_LOW;
409 if (mode->flags & DRM_MODE_FLAG_NVSYNC)
410 cfg |= JZ_LCD_CFG_VSYNC_ACTIVE_LOW;
411 if (info->bus_flags & DRM_BUS_FLAG_DE_LOW)
412 cfg |= JZ_LCD_CFG_DE_ACTIVE_LOW;
413 if (info->bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE)
414 cfg |= JZ_LCD_CFG_PCLK_FALLING_EDGE;
415
416 if (!priv->panel_is_sharp) {
417 if (conn->connector_type == DRM_MODE_CONNECTOR_TV) {
418 if (mode->flags & DRM_MODE_FLAG_INTERLACE)
419 cfg |= JZ_LCD_CFG_MODE_TV_OUT_I;
420 else
421 cfg |= JZ_LCD_CFG_MODE_TV_OUT_P;
422 } else {
423 switch (*info->bus_formats) {
424 case MEDIA_BUS_FMT_RGB565_1X16:
425 cfg |= JZ_LCD_CFG_MODE_GENERIC_16BIT;
426 break;
427 case MEDIA_BUS_FMT_RGB666_1X18:
428 cfg |= JZ_LCD_CFG_MODE_GENERIC_18BIT;
429 break;
430 case MEDIA_BUS_FMT_RGB888_1X24:
431 cfg |= JZ_LCD_CFG_MODE_GENERIC_24BIT;
432 break;
433 case MEDIA_BUS_FMT_RGB888_3X8:
434 cfg |= JZ_LCD_CFG_MODE_8BIT_SERIAL;
435 break;
436 default:
437 break;
438 }
439 }
440 }
441
442 regmap_write(priv->map, JZ_REG_LCD_CFG, cfg);
443 }
444
445 static int ingenic_drm_encoder_atomic_check(struct drm_encoder *encoder,
446 struct drm_crtc_state *crtc_state,
447 struct drm_connector_state *conn_state)
448 {
449 struct drm_display_info *info = &conn_state->connector->display_info;
450
451 if (info->num_bus_formats != 1)
452 return -EINVAL;
453
454 if (conn_state->connector->connector_type == DRM_MODE_CONNECTOR_TV)
455 return 0;
456
457 switch (*info->bus_formats) {
458 case MEDIA_BUS_FMT_RGB565_1X16:
459 case MEDIA_BUS_FMT_RGB666_1X18:
460 case MEDIA_BUS_FMT_RGB888_1X24:
461 case MEDIA_BUS_FMT_RGB888_3X8:
462 return 0;
463 default:
464 return -EINVAL;
465 }
466 }
467
468 static irqreturn_t ingenic_drm_irq_handler(int irq, void *arg)
469 {
470 struct ingenic_drm *priv = drm_device_get_priv(arg);
471 unsigned int state;
472
473 regmap_read(priv->map, JZ_REG_LCD_STATE, &state);
474
475 regmap_update_bits(priv->map, JZ_REG_LCD_STATE,
476 JZ_LCD_STATE_EOF_IRQ, 0);
477
478 if (state & JZ_LCD_STATE_EOF_IRQ)
479 drm_crtc_handle_vblank(&priv->crtc);
480
481 return IRQ_HANDLED;
482 }
483
484 static void ingenic_drm_release(struct drm_device *drm)
485 {
486 struct ingenic_drm *priv = drm_device_get_priv(drm);
487
488 drm_mode_config_cleanup(drm);
489 drm_dev_fini(drm);
490 kfree(priv);
491 }
492
493 static int ingenic_drm_enable_vblank(struct drm_crtc *crtc)
494 {
495 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
496
497 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
498 JZ_LCD_CTRL_EOF_IRQ, JZ_LCD_CTRL_EOF_IRQ);
499
500 return 0;
501 }
502
503 static void ingenic_drm_disable_vblank(struct drm_crtc *crtc)
504 {
505 struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
506
507 regmap_update_bits(priv->map, JZ_REG_LCD_CTRL, JZ_LCD_CTRL_EOF_IRQ, 0);
508 }
509
510 DEFINE_DRM_GEM_CMA_FOPS(ingenic_drm_fops);
511
512 static struct drm_driver ingenic_drm_driver_data = {
513 .driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
514 .name = "ingenic-drm",
515 .desc = "DRM module for Ingenic SoCs",
516 .date = "20190422",
517 .major = 1,
518 .minor = 0,
519 .patchlevel = 0,
520
521 .fops = &ingenic_drm_fops,
522
523 .dumb_create = drm_gem_cma_dumb_create,
524 .gem_free_object_unlocked = drm_gem_cma_free_object,
525 .gem_vm_ops = &drm_gem_cma_vm_ops,
526
527 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
528 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
529 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
530 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
531 .gem_prime_vmap = drm_gem_cma_prime_vmap,
532 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
533 .gem_prime_mmap = drm_gem_cma_prime_mmap,
534
535 .irq_handler = ingenic_drm_irq_handler,
536 .release = ingenic_drm_release,
537 };
538
539 static const struct drm_plane_funcs ingenic_drm_primary_plane_funcs = {
540 .update_plane = drm_atomic_helper_update_plane,
541 .disable_plane = drm_atomic_helper_disable_plane,
542 .reset = drm_atomic_helper_plane_reset,
543 .destroy = drm_plane_cleanup,
544
545 .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state,
546 .atomic_destroy_state = drm_atomic_helper_plane_destroy_state,
547 };
548
549 static const struct drm_crtc_funcs ingenic_drm_crtc_funcs = {
550 .set_config = drm_atomic_helper_set_config,
551 .page_flip = drm_atomic_helper_page_flip,
552 .reset = drm_atomic_helper_crtc_reset,
553 .destroy = drm_crtc_cleanup,
554
555 .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
556 .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
557
558 .enable_vblank = ingenic_drm_enable_vblank,
559 .disable_vblank = ingenic_drm_disable_vblank,
560
561 .gamma_set = drm_atomic_helper_legacy_gamma_set,
562 };
563
564 static const struct drm_plane_helper_funcs ingenic_drm_plane_helper_funcs = {
565 .atomic_update = ingenic_drm_plane_atomic_update,
566 .prepare_fb = drm_gem_fb_prepare_fb,
567 };
568
569 static const struct drm_crtc_helper_funcs ingenic_drm_crtc_helper_funcs = {
570 .atomic_enable = ingenic_drm_crtc_atomic_enable,
571 .atomic_disable = ingenic_drm_crtc_atomic_disable,
572 .atomic_flush = ingenic_drm_crtc_atomic_flush,
573 .atomic_check = ingenic_drm_crtc_atomic_check,
574 };
575
576 static const struct drm_encoder_helper_funcs ingenic_drm_encoder_helper_funcs = {
577 .atomic_mode_set = ingenic_drm_encoder_atomic_mode_set,
578 .atomic_check = ingenic_drm_encoder_atomic_check,
579 };
580
581 static const struct drm_mode_config_funcs ingenic_drm_mode_config_funcs = {
582 .fb_create = drm_gem_fb_create,
583 .output_poll_changed = drm_fb_helper_output_poll_changed,
584 .atomic_check = drm_atomic_helper_check,
585 .atomic_commit = drm_atomic_helper_commit,
586 };
587
588 static const struct drm_encoder_funcs ingenic_drm_encoder_funcs = {
589 .destroy = drm_encoder_cleanup,
590 };
591
592 static void ingenic_drm_free_dma_hwdesc(void *d)
593 {
594 struct ingenic_drm *priv = d;
595
596 dma_free_coherent(priv->dev, sizeof(*priv->dma_hwdesc),
597 priv->dma_hwdesc, priv->dma_hwdesc_phys);
598 }
599
600 static int ingenic_drm_probe(struct platform_device *pdev)
601 {
602 const struct jz_soc_info *soc_info;
603 struct device *dev = &pdev->dev;
604 struct ingenic_drm *priv;
605 struct clk *parent_clk;
606 struct drm_bridge *bridge;
607 struct drm_panel *panel;
608 struct drm_device *drm;
609 void __iomem *base;
610 long parent_rate;
611 int ret, irq;
612
613 soc_info = of_device_get_match_data(dev);
614 if (!soc_info) {
615 dev_err(dev, "Missing platform data\n");
616 return -EINVAL;
617 }
618
619 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
620 if (!priv)
621 return -ENOMEM;
622
623 priv->dev = dev;
624 drm = &priv->drm;
625 drm->dev_private = priv;
626
627 platform_set_drvdata(pdev, priv);
628
629 ret = devm_drm_dev_init(dev, drm, &ingenic_drm_driver_data);
630 if (ret) {
631 kfree(priv);
632 return ret;
633 }
634
635 drm_mode_config_init(drm);
636 drm->mode_config.min_width = 0;
637 drm->mode_config.min_height = 0;
638 drm->mode_config.max_width = 800;
639 drm->mode_config.max_height = 600;
640 drm->mode_config.funcs = &ingenic_drm_mode_config_funcs;
641
642 base = devm_platform_ioremap_resource(pdev, 0);
643 if (IS_ERR(base)) {
644 dev_err(dev, "Failed to get memory resource");
645 return PTR_ERR(base);
646 }
647
648 priv->map = devm_regmap_init_mmio(dev, base,
649 &ingenic_drm_regmap_config);
650 if (IS_ERR(priv->map)) {
651 dev_err(dev, "Failed to create regmap");
652 return PTR_ERR(priv->map);
653 }
654
655 irq = platform_get_irq(pdev, 0);
656 if (irq < 0) {
657 dev_err(dev, "Failed to get platform irq");
658 return irq;
659 }
660
661 if (soc_info->needs_dev_clk) {
662 priv->lcd_clk = devm_clk_get(dev, "lcd");
663 if (IS_ERR(priv->lcd_clk)) {
664 dev_err(dev, "Failed to get lcd clock");
665 return PTR_ERR(priv->lcd_clk);
666 }
667 }
668
669 priv->pix_clk = devm_clk_get(dev, "lcd_pclk");
670 if (IS_ERR(priv->pix_clk)) {
671 dev_err(dev, "Failed to get pixel clock");
672 return PTR_ERR(priv->pix_clk);
673 }
674
675 ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0, &panel, &bridge);
676 if (ret) {
677 if (ret != -EPROBE_DEFER)
678 dev_err(dev, "Failed to get panel handle");
679 return ret;
680 }
681
682 if (panel)
683 bridge = devm_drm_panel_bridge_add(dev, panel,
684 DRM_MODE_CONNECTOR_DPI);
685
686 priv->dma_hwdesc = dma_alloc_coherent(dev, sizeof(*priv->dma_hwdesc),
687 &priv->dma_hwdesc_phys,
688 GFP_KERNEL);
689 if (!priv->dma_hwdesc)
690 return -ENOMEM;
691
692 ret = devm_add_action_or_reset(dev, ingenic_drm_free_dma_hwdesc, priv);
693 if (ret)
694 return ret;
695
696 priv->dma_hwdesc->next = priv->dma_hwdesc_phys;
697 priv->dma_hwdesc->id = 0xdeafbead;
698
699 drm_plane_helper_add(&priv->primary, &ingenic_drm_plane_helper_funcs);
700
701 ret = drm_universal_plane_init(drm, &priv->primary,
702 0, &ingenic_drm_primary_plane_funcs,
703 ingenic_drm_primary_formats,
704 ARRAY_SIZE(ingenic_drm_primary_formats),
705 NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
706 if (ret) {
707 dev_err(dev, "Failed to register primary plane: %i", ret);
708 return ret;
709 }
710
711 drm_crtc_helper_add(&priv->crtc, &ingenic_drm_crtc_helper_funcs);
712
713 ret = drm_crtc_init_with_planes(drm, &priv->crtc, &priv->primary,
714 NULL, &ingenic_drm_crtc_funcs, NULL);
715 if (ret) {
716 dev_err(dev, "Failed to init CRTC: %i", ret);
717 return ret;
718 }
719
720 priv->encoder.possible_crtcs = 1;
721
722 drm_encoder_helper_add(&priv->encoder,
723 &ingenic_drm_encoder_helper_funcs);
724
725 ret = drm_encoder_init(drm, &priv->encoder, &ingenic_drm_encoder_funcs,
726 DRM_MODE_ENCODER_DPI, NULL);
727 if (ret) {
728 dev_err(dev, "Failed to init encoder: %i", ret);
729 return ret;
730 }
731
732 ret = drm_bridge_attach(&priv->encoder, bridge, NULL);
733 if (ret) {
734 dev_err(dev, "Unable to attach bridge");
735 return ret;
736 }
737
738 ret = drm_irq_install(drm, irq);
739 if (ret) {
740 dev_err(dev, "Unable to install IRQ handler");
741 return ret;
742 }
743
744 ret = drm_vblank_init(drm, 1);
745 if (ret) {
746 dev_err(dev, "Failed calling drm_vblank_init()");
747 return ret;
748 }
749
750 drm_mode_config_reset(drm);
751
752 ret = clk_prepare_enable(priv->pix_clk);
753 if (ret) {
754 dev_err(dev, "Unable to start pixel clock");
755 return ret;
756 }
757
758 if (priv->lcd_clk) {
759 parent_clk = clk_get_parent(priv->lcd_clk);
760 parent_rate = clk_get_rate(parent_clk);
761
762
763
764
765
766
767 ret = clk_set_rate(priv->lcd_clk, parent_rate);
768 if (ret) {
769 dev_err(dev, "Unable to set LCD clock rate");
770 goto err_pixclk_disable;
771 }
772
773 ret = clk_prepare_enable(priv->lcd_clk);
774 if (ret) {
775 dev_err(dev, "Unable to start lcd clock");
776 goto err_pixclk_disable;
777 }
778 }
779
780 ret = drm_dev_register(drm, 0);
781 if (ret) {
782 dev_err(dev, "Failed to register DRM driver");
783 goto err_devclk_disable;
784 }
785
786 ret = drm_fbdev_generic_setup(drm, 32);
787 if (ret)
788 dev_warn(dev, "Unable to start fbdev emulation: %i", ret);
789
790 return 0;
791
792 err_devclk_disable:
793 if (priv->lcd_clk)
794 clk_disable_unprepare(priv->lcd_clk);
795 err_pixclk_disable:
796 clk_disable_unprepare(priv->pix_clk);
797 return ret;
798 }
799
800 static int ingenic_drm_remove(struct platform_device *pdev)
801 {
802 struct ingenic_drm *priv = platform_get_drvdata(pdev);
803
804 if (priv->lcd_clk)
805 clk_disable_unprepare(priv->lcd_clk);
806 clk_disable_unprepare(priv->pix_clk);
807
808 drm_dev_unregister(&priv->drm);
809 drm_atomic_helper_shutdown(&priv->drm);
810
811 return 0;
812 }
813
814 static const struct jz_soc_info jz4740_soc_info = {
815 .needs_dev_clk = true,
816 };
817
818 static const struct jz_soc_info jz4725b_soc_info = {
819 .needs_dev_clk = false,
820 };
821
822 static const struct of_device_id ingenic_drm_of_match[] = {
823 { .compatible = "ingenic,jz4740-lcd", .data = &jz4740_soc_info },
824 { .compatible = "ingenic,jz4725b-lcd", .data = &jz4725b_soc_info },
825 { },
826 };
827 MODULE_DEVICE_TABLE(of, ingenic_drm_of_match);
828
829 static struct platform_driver ingenic_drm_driver = {
830 .driver = {
831 .name = "ingenic-drm",
832 .of_match_table = of_match_ptr(ingenic_drm_of_match),
833 },
834 .probe = ingenic_drm_probe,
835 .remove = ingenic_drm_remove,
836 };
837 module_platform_driver(ingenic_drm_driver);
838
839 MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>");
840 MODULE_DESCRIPTION("DRM driver for the Ingenic SoCs\n");
841 MODULE_LICENSE("GPL v2");