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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / gpu / drm / vc4 / vc4_hdmi.c
blobcea18dc15f77cdb3a7b6ab74f296ab54faae56ef
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2015 Broadcom
4 * Copyright (c) 2014 The Linux Foundation. All rights reserved.
5 * Copyright (C) 2013 Red Hat
6 * Author: Rob Clark <robdclark@gmail.com>
7 */
8
9 /**
10 * DOC: VC4 Falcon HDMI module
11 *
12 * The HDMI core has a state machine and a PHY. On BCM2835, most of
13 * the unit operates off of the HSM clock from CPRMAN. It also
14 * internally uses the PLLH_PIX clock for the PHY.
15 *
16 * HDMI infoframes are kept within a small packet ram, where each
17 * packet can be individually enabled for including in a frame.
18 *
19 * HDMI audio is implemented entirely within the HDMI IP block. A
20 * register in the HDMI encoder takes SPDIF frames from the DMA engine
21 * and transfers them over an internal MAI (multi-channel audio
22 * interconnect) bus to the encoder side for insertion into the video
23 * blank regions.
24 *
25 * The driver's HDMI encoder does not yet support power management.
26 * The HDMI encoder's power domain and the HSM/pixel clocks are kept
27 * continuously running, and only the HDMI logic and packet ram are
28 * powered off/on at disable/enable time.
29 *
30 * The driver does not yet support CEC control, though the HDMI
31 * encoder block has CEC support.
32 */
33
34 #include <drm/drm_atomic_helper.h>
35 #include <drm/drm_edid.h>
36 #include <drm/drm_probe_helper.h>
37 #include <linux/clk.h>
38 #include <linux/component.h>
39 #include <linux/i2c.h>
40 #include <linux/of_address.h>
41 #include <linux/of_gpio.h>
42 #include <linux/of_platform.h>
43 #include <linux/pm_runtime.h>
44 #include <linux/rational.h>
45 #include <sound/dmaengine_pcm.h>
46 #include <sound/pcm_drm_eld.h>
47 #include <sound/pcm_params.h>
48 #include <sound/soc.h>
49 #include "media/cec.h"
50 #include "vc4_drv.h"
51 #include "vc4_regs.h"
52
53 #define HSM_CLOCK_FREQ 163682864
54 #define CEC_CLOCK_FREQ 40000
55 #define CEC_CLOCK_DIV (HSM_CLOCK_FREQ / CEC_CLOCK_FREQ)
56
57 /* HDMI audio information */
58 struct vc4_hdmi_audio {
59 struct snd_soc_card card;
60 struct snd_soc_dai_link link;
61 struct snd_soc_dai_link_component cpu;
62 struct snd_soc_dai_link_component codec;
63 struct snd_soc_dai_link_component platform;
64 int samplerate;
65 int channels;
66 struct snd_dmaengine_dai_dma_data dma_data;
67 struct snd_pcm_substream *substream;
68 };
69
70 /* General HDMI hardware state. */
71 struct vc4_hdmi {
72 struct platform_device *pdev;
73
74 struct drm_encoder *encoder;
75 struct drm_connector *connector;
76
77 struct vc4_hdmi_audio audio;
78
79 struct i2c_adapter *ddc;
80 void __iomem *hdmicore_regs;
81 void __iomem *hd_regs;
82 int hpd_gpio;
83 bool hpd_active_low;
84
85 struct cec_adapter *cec_adap;
86 struct cec_msg cec_rx_msg;
87 bool cec_tx_ok;
88 bool cec_irq_was_rx;
89
90 struct clk *pixel_clock;
91 struct clk *hsm_clock;
92
93 struct debugfs_regset32 hdmi_regset;
94 struct debugfs_regset32 hd_regset;
95 };
96
97 #define HDMI_READ(offset) readl(vc4->hdmi->hdmicore_regs + offset)
98 #define HDMI_WRITE(offset, val) writel(val, vc4->hdmi->hdmicore_regs + offset)
99 #define HD_READ(offset) readl(vc4->hdmi->hd_regs + offset)
100 #define HD_WRITE(offset, val) writel(val, vc4->hdmi->hd_regs + offset)
101
102 /* VC4 HDMI encoder KMS struct */
103 struct vc4_hdmi_encoder {
104 struct vc4_encoder base;
105 bool hdmi_monitor;
106 bool limited_rgb_range;
107 };
108
109 static inline struct vc4_hdmi_encoder *
110 to_vc4_hdmi_encoder(struct drm_encoder *encoder)
111 {
112 return container_of(encoder, struct vc4_hdmi_encoder, base.base);
113 }
114
115 /* VC4 HDMI connector KMS struct */
116 struct vc4_hdmi_connector {
117 struct drm_connector base;
118
119 /* Since the connector is attached to just the one encoder,
120 * this is the reference to it so we can do the best_encoder()
121 * hook.
122 */
123 struct drm_encoder *encoder;
124 };
125
126 static inline struct vc4_hdmi_connector *
127 to_vc4_hdmi_connector(struct drm_connector *connector)
128 {
129 return container_of(connector, struct vc4_hdmi_connector, base);
130 }
131
132 static const struct debugfs_reg32 hdmi_regs[] = {
133 VC4_REG32(VC4_HDMI_CORE_REV),
134 VC4_REG32(VC4_HDMI_SW_RESET_CONTROL),
135 VC4_REG32(VC4_HDMI_HOTPLUG_INT),
136 VC4_REG32(VC4_HDMI_HOTPLUG),
137 VC4_REG32(VC4_HDMI_MAI_CHANNEL_MAP),
138 VC4_REG32(VC4_HDMI_MAI_CONFIG),
139 VC4_REG32(VC4_HDMI_MAI_FORMAT),
140 VC4_REG32(VC4_HDMI_AUDIO_PACKET_CONFIG),
141 VC4_REG32(VC4_HDMI_RAM_PACKET_CONFIG),
142 VC4_REG32(VC4_HDMI_HORZA),
143 VC4_REG32(VC4_HDMI_HORZB),
144 VC4_REG32(VC4_HDMI_FIFO_CTL),
145 VC4_REG32(VC4_HDMI_SCHEDULER_CONTROL),
146 VC4_REG32(VC4_HDMI_VERTA0),
147 VC4_REG32(VC4_HDMI_VERTA1),
148 VC4_REG32(VC4_HDMI_VERTB0),
149 VC4_REG32(VC4_HDMI_VERTB1),
150 VC4_REG32(VC4_HDMI_TX_PHY_RESET_CTL),
151 VC4_REG32(VC4_HDMI_TX_PHY_CTL0),
152
153 VC4_REG32(VC4_HDMI_CEC_CNTRL_1),
154 VC4_REG32(VC4_HDMI_CEC_CNTRL_2),
155 VC4_REG32(VC4_HDMI_CEC_CNTRL_3),
156 VC4_REG32(VC4_HDMI_CEC_CNTRL_4),
157 VC4_REG32(VC4_HDMI_CEC_CNTRL_5),
158 VC4_REG32(VC4_HDMI_CPU_STATUS),
159 VC4_REG32(VC4_HDMI_CPU_MASK_STATUS),
160
161 VC4_REG32(VC4_HDMI_CEC_RX_DATA_1),
162 VC4_REG32(VC4_HDMI_CEC_RX_DATA_2),
163 VC4_REG32(VC4_HDMI_CEC_RX_DATA_3),
164 VC4_REG32(VC4_HDMI_CEC_RX_DATA_4),
165 VC4_REG32(VC4_HDMI_CEC_TX_DATA_1),
166 VC4_REG32(VC4_HDMI_CEC_TX_DATA_2),
167 VC4_REG32(VC4_HDMI_CEC_TX_DATA_3),
168 VC4_REG32(VC4_HDMI_CEC_TX_DATA_4),
169 };
170
171 static const struct debugfs_reg32 hd_regs[] = {
172 VC4_REG32(VC4_HD_M_CTL),
173 VC4_REG32(VC4_HD_MAI_CTL),
174 VC4_REG32(VC4_HD_MAI_THR),
175 VC4_REG32(VC4_HD_MAI_FMT),
176 VC4_REG32(VC4_HD_MAI_SMP),
177 VC4_REG32(VC4_HD_VID_CTL),
178 VC4_REG32(VC4_HD_CSC_CTL),
179 VC4_REG32(VC4_HD_FRAME_COUNT),
180 };
181
182 static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
183 {
184 struct drm_info_node *node = (struct drm_info_node *)m->private;
185 struct drm_device *dev = node->minor->dev;
186 struct vc4_dev *vc4 = to_vc4_dev(dev);
187 struct vc4_hdmi *hdmi = vc4->hdmi;
188 struct drm_printer p = drm_seq_file_printer(m);
189
190 drm_print_regset32(&p, &hdmi->hdmi_regset);
191 drm_print_regset32(&p, &hdmi->hd_regset);
192
193 return 0;
194 }
195
196 static enum drm_connector_status
197 vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
198 {
199 struct drm_device *dev = connector->dev;
200 struct vc4_dev *vc4 = to_vc4_dev(dev);
201
202 if (vc4->hdmi->hpd_gpio) {
203 if (gpio_get_value_cansleep(vc4->hdmi->hpd_gpio) ^
204 vc4->hdmi->hpd_active_low)
205 return connector_status_connected;
206 cec_phys_addr_invalidate(vc4->hdmi->cec_adap);
207 return connector_status_disconnected;
208 }
209
210 if (drm_probe_ddc(vc4->hdmi->ddc))
211 return connector_status_connected;
212
213 if (HDMI_READ(VC4_HDMI_HOTPLUG) & VC4_HDMI_HOTPLUG_CONNECTED)
214 return connector_status_connected;
215 cec_phys_addr_invalidate(vc4->hdmi->cec_adap);
216 return connector_status_disconnected;
217 }
218
219 static void vc4_hdmi_connector_destroy(struct drm_connector *connector)
220 {
221 drm_connector_unregister(connector);
222 drm_connector_cleanup(connector);
223 }
224
225 static int vc4_hdmi_connector_get_modes(struct drm_connector *connector)
226 {
227 struct vc4_hdmi_connector *vc4_connector =
228 to_vc4_hdmi_connector(connector);
229 struct drm_encoder *encoder = vc4_connector->encoder;
230 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
231 struct drm_device *dev = connector->dev;
232 struct vc4_dev *vc4 = to_vc4_dev(dev);
233 int ret = 0;
234 struct edid *edid;
235
236 edid = drm_get_edid(connector, vc4->hdmi->ddc);
237 cec_s_phys_addr_from_edid(vc4->hdmi->cec_adap, edid);
238 if (!edid)
239 return -ENODEV;
240
241 vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid);
242
243 drm_connector_update_edid_property(connector, edid);
244 ret = drm_add_edid_modes(connector, edid);
245 kfree(edid);
246
247 return ret;
248 }
249
250 static void vc4_hdmi_connector_reset(struct drm_connector *connector)
251 {
252 drm_atomic_helper_connector_reset(connector);
253 drm_atomic_helper_connector_tv_reset(connector);
254 }
255
256 static const struct drm_connector_funcs vc4_hdmi_connector_funcs = {
257 .detect = vc4_hdmi_connector_detect,
258 .fill_modes = drm_helper_probe_single_connector_modes,
259 .destroy = vc4_hdmi_connector_destroy,
260 .reset = vc4_hdmi_connector_reset,
261 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
262 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
263 };
264
265 static const struct drm_connector_helper_funcs vc4_hdmi_connector_helper_funcs = {
266 .get_modes = vc4_hdmi_connector_get_modes,
267 };
268
269 static struct drm_connector *vc4_hdmi_connector_init(struct drm_device *dev,
270 struct drm_encoder *encoder,
271 struct i2c_adapter *ddc)
272 {
273 struct drm_connector *connector;
274 struct vc4_hdmi_connector *hdmi_connector;
275 int ret;
276
277 hdmi_connector = devm_kzalloc(dev->dev, sizeof(*hdmi_connector),
278 GFP_KERNEL);
279 if (!hdmi_connector)
280 return ERR_PTR(-ENOMEM);
281 connector = &hdmi_connector->base;
282
283 hdmi_connector->encoder = encoder;
284
285 drm_connector_init_with_ddc(dev, connector,
286 &vc4_hdmi_connector_funcs,
287 DRM_MODE_CONNECTOR_HDMIA,
288 ddc);
289 drm_connector_helper_add(connector, &vc4_hdmi_connector_helper_funcs);
290
291 /* Create and attach TV margin props to this connector. */
292 ret = drm_mode_create_tv_margin_properties(dev);
293 if (ret)
294 return ERR_PTR(ret);
295
296 drm_connector_attach_tv_margin_properties(connector);
297
298 connector->polled = (DRM_CONNECTOR_POLL_CONNECT |
299 DRM_CONNECTOR_POLL_DISCONNECT);
300
301 connector->interlace_allowed = 1;
302 connector->doublescan_allowed = 0;
303
304 drm_connector_attach_encoder(connector, encoder);
305
306 return connector;
307 }
308
309 static void vc4_hdmi_encoder_destroy(struct drm_encoder *encoder)
310 {
311 drm_encoder_cleanup(encoder);
312 }
313
314 static const struct drm_encoder_funcs vc4_hdmi_encoder_funcs = {
315 .destroy = vc4_hdmi_encoder_destroy,
316 };
317
318 static int vc4_hdmi_stop_packet(struct drm_encoder *encoder,
319 enum hdmi_infoframe_type type)
320 {
321 struct drm_device *dev = encoder->dev;
322 struct vc4_dev *vc4 = to_vc4_dev(dev);
323 u32 packet_id = type - 0x80;
324
325 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
326 HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) & ~BIT(packet_id));
327
328 return wait_for(!(HDMI_READ(VC4_HDMI_RAM_PACKET_STATUS) &
329 BIT(packet_id)), 100);
330 }
331
332 static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
333 union hdmi_infoframe *frame)
334 {
335 struct drm_device *dev = encoder->dev;
336 struct vc4_dev *vc4 = to_vc4_dev(dev);
337 u32 packet_id = frame->any.type - 0x80;
338 u32 packet_reg = VC4_HDMI_RAM_PACKET(packet_id);
339 uint8_t buffer[VC4_HDMI_PACKET_STRIDE];
340 ssize_t len, i;
341 int ret;
342
343 WARN_ONCE(!(HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) &
344 VC4_HDMI_RAM_PACKET_ENABLE),
345 "Packet RAM has to be on to store the packet.");
346
347 len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer));
348 if (len < 0)
349 return;
350
351 ret = vc4_hdmi_stop_packet(encoder, frame->any.type);
352 if (ret) {
353 DRM_ERROR("Failed to wait for infoframe to go idle: %d\n", ret);
354 return;
355 }
356
357 for (i = 0; i < len; i += 7) {
358 HDMI_WRITE(packet_reg,
359 buffer[i + 0] << 0 |
360 buffer[i + 1] << 8 |
361 buffer[i + 2] << 16);
362 packet_reg += 4;
363
364 HDMI_WRITE(packet_reg,
365 buffer[i + 3] << 0 |
366 buffer[i + 4] << 8 |
367 buffer[i + 5] << 16 |
368 buffer[i + 6] << 24);
369 packet_reg += 4;
370 }
371
372 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
373 HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) | BIT(packet_id));
374 ret = wait_for((HDMI_READ(VC4_HDMI_RAM_PACKET_STATUS) &
375 BIT(packet_id)), 100);
376 if (ret)
377 DRM_ERROR("Failed to wait for infoframe to start: %d\n", ret);
378 }
379
380 static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
381 {
382 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
383 struct vc4_dev *vc4 = encoder->dev->dev_private;
384 struct vc4_hdmi *hdmi = vc4->hdmi;
385 struct drm_connector_state *cstate = hdmi->connector->state;
386 struct drm_crtc *crtc = encoder->crtc;
387 const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
388 union hdmi_infoframe frame;
389 int ret;
390
391 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi,
392 hdmi->connector, mode);
393 if (ret < 0) {
394 DRM_ERROR("couldn't fill AVI infoframe\n");
395 return;
396 }
397
398 drm_hdmi_avi_infoframe_quant_range(&frame.avi,
399 hdmi->connector, mode,
400 vc4_encoder->limited_rgb_range ?
401 HDMI_QUANTIZATION_RANGE_LIMITED :
402 HDMI_QUANTIZATION_RANGE_FULL);
403
404 drm_hdmi_avi_infoframe_bars(&frame.avi, cstate);
405
406 vc4_hdmi_write_infoframe(encoder, &frame);
407 }
408
409 static void vc4_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
410 {
411 union hdmi_infoframe frame;
412 int ret;
413
414 ret = hdmi_spd_infoframe_init(&frame.spd, "Broadcom", "Videocore");
415 if (ret < 0) {
416 DRM_ERROR("couldn't fill SPD infoframe\n");
417 return;
418 }
419
420 frame.spd.sdi = HDMI_SPD_SDI_PC;
421
422 vc4_hdmi_write_infoframe(encoder, &frame);
423 }
424
425 static void vc4_hdmi_set_audio_infoframe(struct drm_encoder *encoder)
426 {
427 struct drm_device *drm = encoder->dev;
428 struct vc4_dev *vc4 = drm->dev_private;
429 struct vc4_hdmi *hdmi = vc4->hdmi;
430 union hdmi_infoframe frame;
431 int ret;
432
433 ret = hdmi_audio_infoframe_init(&frame.audio);
434
435 frame.audio.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
436 frame.audio.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
437 frame.audio.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
438 frame.audio.channels = hdmi->audio.channels;
439
440 vc4_hdmi_write_infoframe(encoder, &frame);
441 }
442
443 static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
444 {
445 vc4_hdmi_set_avi_infoframe(encoder);
446 vc4_hdmi_set_spd_infoframe(encoder);
447 }
448
449 static void vc4_hdmi_encoder_disable(struct drm_encoder *encoder)
450 {
451 struct drm_device *dev = encoder->dev;
452 struct vc4_dev *vc4 = to_vc4_dev(dev);
453 struct vc4_hdmi *hdmi = vc4->hdmi;
454 int ret;
455
456 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG, 0);
457
458 HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0xf << 16);
459 HD_WRITE(VC4_HD_VID_CTL,
460 HD_READ(VC4_HD_VID_CTL) & ~VC4_HD_VID_CTL_ENABLE);
461
462 clk_disable_unprepare(hdmi->pixel_clock);
463
464 ret = pm_runtime_put(&hdmi->pdev->dev);
465 if (ret < 0)
466 DRM_ERROR("Failed to release power domain: %d\n", ret);
467 }
468
469 static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
470 {
471 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
472 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
473 struct drm_device *dev = encoder->dev;
474 struct vc4_dev *vc4 = to_vc4_dev(dev);
475 struct vc4_hdmi *hdmi = vc4->hdmi;
476 bool debug_dump_regs = false;
477 bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
478 bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
479 bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
480 u32 pixel_rep = (mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1;
481 u32 verta = (VC4_SET_FIELD(mode->crtc_vsync_end - mode->crtc_vsync_start,
482 VC4_HDMI_VERTA_VSP) |
483 VC4_SET_FIELD(mode->crtc_vsync_start - mode->crtc_vdisplay,
484 VC4_HDMI_VERTA_VFP) |
485 VC4_SET_FIELD(mode->crtc_vdisplay, VC4_HDMI_VERTA_VAL));
486 u32 vertb = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) |
487 VC4_SET_FIELD(mode->crtc_vtotal - mode->crtc_vsync_end,
488 VC4_HDMI_VERTB_VBP));
489 u32 vertb_even = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) |
490 VC4_SET_FIELD(mode->crtc_vtotal -
491 mode->crtc_vsync_end -
492 interlaced,
493 VC4_HDMI_VERTB_VBP));
494 u32 csc_ctl;
495 int ret;
496
497 ret = pm_runtime_get_sync(&hdmi->pdev->dev);
498 if (ret < 0) {
499 DRM_ERROR("Failed to retain power domain: %d\n", ret);
500 return;
501 }
502
503 ret = clk_set_rate(hdmi->pixel_clock,
504 mode->clock * 1000 *
505 ((mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1));
506 if (ret) {
507 DRM_ERROR("Failed to set pixel clock rate: %d\n", ret);
508 return;
509 }
510
511 ret = clk_prepare_enable(hdmi->pixel_clock);
512 if (ret) {
513 DRM_ERROR("Failed to turn on pixel clock: %d\n", ret);
514 return;
515 }
516
517 HDMI_WRITE(VC4_HDMI_SW_RESET_CONTROL,
518 VC4_HDMI_SW_RESET_HDMI |
519 VC4_HDMI_SW_RESET_FORMAT_DETECT);
520
521 HDMI_WRITE(VC4_HDMI_SW_RESET_CONTROL, 0);
522
523 /* PHY should be in reset, like
524 * vc4_hdmi_encoder_disable() does.
525 */
526 HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0xf << 16);
527
528 HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0);
529
530 if (debug_dump_regs) {
531 struct drm_printer p = drm_info_printer(&hdmi->pdev->dev);
532
533 dev_info(&hdmi->pdev->dev, "HDMI regs before:\n");
534 drm_print_regset32(&p, &hdmi->hdmi_regset);
535 drm_print_regset32(&p, &hdmi->hd_regset);
536 }
537
538 HD_WRITE(VC4_HD_VID_CTL, 0);
539
540 HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
541 HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
542 VC4_HDMI_SCHEDULER_CONTROL_MANUAL_FORMAT |
543 VC4_HDMI_SCHEDULER_CONTROL_IGNORE_VSYNC_PREDICTS);
544
545 HDMI_WRITE(VC4_HDMI_HORZA,
546 (vsync_pos ? VC4_HDMI_HORZA_VPOS : 0) |
547 (hsync_pos ? VC4_HDMI_HORZA_HPOS : 0) |
548 VC4_SET_FIELD(mode->hdisplay * pixel_rep,
549 VC4_HDMI_HORZA_HAP));
550
551 HDMI_WRITE(VC4_HDMI_HORZB,
552 VC4_SET_FIELD((mode->htotal -
553 mode->hsync_end) * pixel_rep,
554 VC4_HDMI_HORZB_HBP) |
555 VC4_SET_FIELD((mode->hsync_end -
556 mode->hsync_start) * pixel_rep,
557 VC4_HDMI_HORZB_HSP) |
558 VC4_SET_FIELD((mode->hsync_start -
559 mode->hdisplay) * pixel_rep,
560 VC4_HDMI_HORZB_HFP));
561
562 HDMI_WRITE(VC4_HDMI_VERTA0, verta);
563 HDMI_WRITE(VC4_HDMI_VERTA1, verta);
564
565 HDMI_WRITE(VC4_HDMI_VERTB0, vertb_even);
566 HDMI_WRITE(VC4_HDMI_VERTB1, vertb);
567
568 HD_WRITE(VC4_HD_VID_CTL,
569 (vsync_pos ? 0 : VC4_HD_VID_CTL_VSYNC_LOW) |
570 (hsync_pos ? 0 : VC4_HD_VID_CTL_HSYNC_LOW));
571
572 csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
573 VC4_HD_CSC_CTL_ORDER);
574
575 if (vc4_encoder->hdmi_monitor &&
576 drm_default_rgb_quant_range(mode) ==
577 HDMI_QUANTIZATION_RANGE_LIMITED) {
578 /* CEA VICs other than #1 requre limited range RGB
579 * output unless overridden by an AVI infoframe.
580 * Apply a colorspace conversion to squash 0-255 down
581 * to 16-235. The matrix here is:
582 *
583 * [ 0 0 0.8594 16]
584 * [ 0 0.8594 0 16]
585 * [ 0.8594 0 0 16]
586 * [ 0 0 0 1]
587 */
588 csc_ctl |= VC4_HD_CSC_CTL_ENABLE;
589 csc_ctl |= VC4_HD_CSC_CTL_RGB2YCC;
590 csc_ctl |= VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
591 VC4_HD_CSC_CTL_MODE);
592
593 HD_WRITE(VC4_HD_CSC_12_11, (0x000 << 16) | 0x000);
594 HD_WRITE(VC4_HD_CSC_14_13, (0x100 << 16) | 0x6e0);
595 HD_WRITE(VC4_HD_CSC_22_21, (0x6e0 << 16) | 0x000);
596 HD_WRITE(VC4_HD_CSC_24_23, (0x100 << 16) | 0x000);
597 HD_WRITE(VC4_HD_CSC_32_31, (0x000 << 16) | 0x6e0);
598 HD_WRITE(VC4_HD_CSC_34_33, (0x100 << 16) | 0x000);
599 vc4_encoder->limited_rgb_range = true;
600 } else {
601 vc4_encoder->limited_rgb_range = false;
602 }
603
604 /* The RGB order applies even when CSC is disabled. */
605 HD_WRITE(VC4_HD_CSC_CTL, csc_ctl);
606
607 HDMI_WRITE(VC4_HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
608
609 if (debug_dump_regs) {
610 struct drm_printer p = drm_info_printer(&hdmi->pdev->dev);
611
612 dev_info(&hdmi->pdev->dev, "HDMI regs after:\n");
613 drm_print_regset32(&p, &hdmi->hdmi_regset);
614 drm_print_regset32(&p, &hdmi->hd_regset);
615 }
616
617 HD_WRITE(VC4_HD_VID_CTL,
618 HD_READ(VC4_HD_VID_CTL) |
619 VC4_HD_VID_CTL_ENABLE |
620 VC4_HD_VID_CTL_UNDERFLOW_ENABLE |
621 VC4_HD_VID_CTL_FRAME_COUNTER_RESET);
622
623 if (vc4_encoder->hdmi_monitor) {
624 HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
625 HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
626 VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
627
628 ret = wait_for(HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
629 VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE, 1000);
630 WARN_ONCE(ret, "Timeout waiting for "
631 "VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
632 } else {
633 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
634 HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) &
635 ~(VC4_HDMI_RAM_PACKET_ENABLE));
636 HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
637 HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
638 ~VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
639
640 ret = wait_for(!(HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
641 VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE), 1000);
642 WARN_ONCE(ret, "Timeout waiting for "
643 "!VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
644 }
645
646 if (vc4_encoder->hdmi_monitor) {
647 u32 drift;
648
649 WARN_ON(!(HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
650 VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE));
651 HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
652 HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
653 VC4_HDMI_SCHEDULER_CONTROL_VERT_ALWAYS_KEEPOUT);
654
655 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
656 VC4_HDMI_RAM_PACKET_ENABLE);
657
658 vc4_hdmi_set_infoframes(encoder);
659
660 drift = HDMI_READ(VC4_HDMI_FIFO_CTL);
661 drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK;
662
663 HDMI_WRITE(VC4_HDMI_FIFO_CTL,
664 drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
665 HDMI_WRITE(VC4_HDMI_FIFO_CTL,
666 drift | VC4_HDMI_FIFO_CTL_RECENTER);
667 usleep_range(1000, 1100);
668 HDMI_WRITE(VC4_HDMI_FIFO_CTL,
669 drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
670 HDMI_WRITE(VC4_HDMI_FIFO_CTL,
671 drift | VC4_HDMI_FIFO_CTL_RECENTER);
672
673 ret = wait_for(HDMI_READ(VC4_HDMI_FIFO_CTL) &
674 VC4_HDMI_FIFO_CTL_RECENTER_DONE, 1);
675 WARN_ONCE(ret, "Timeout waiting for "
676 "VC4_HDMI_FIFO_CTL_RECENTER_DONE");
677 }
678 }
679
680 static enum drm_mode_status
681 vc4_hdmi_encoder_mode_valid(struct drm_encoder *crtc,
682 const struct drm_display_mode *mode)
683 {
684 /* HSM clock must be 108% of the pixel clock. Additionally,
685 * the AXI clock needs to be at least 25% of pixel clock, but
686 * HSM ends up being the limiting factor.
687 */
688 if (mode->clock > HSM_CLOCK_FREQ / (1000 * 108 / 100))
689 return MODE_CLOCK_HIGH;
690
691 return MODE_OK;
692 }
693
694 static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {
695 .mode_valid = vc4_hdmi_encoder_mode_valid,
696 .disable = vc4_hdmi_encoder_disable,
697 .enable = vc4_hdmi_encoder_enable,
698 };
699
700 /* HDMI audio codec callbacks */
701 static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *hdmi)
702 {
703 struct drm_device *drm = hdmi->encoder->dev;
704 struct vc4_dev *vc4 = to_vc4_dev(drm);
705 u32 hsm_clock = clk_get_rate(hdmi->hsm_clock);
706 unsigned long n, m;
707
708 rational_best_approximation(hsm_clock, hdmi->audio.samplerate,
709 VC4_HD_MAI_SMP_N_MASK >>
710 VC4_HD_MAI_SMP_N_SHIFT,
711 (VC4_HD_MAI_SMP_M_MASK >>
712 VC4_HD_MAI_SMP_M_SHIFT) + 1,
713 &n, &m);
714
715 HD_WRITE(VC4_HD_MAI_SMP,
716 VC4_SET_FIELD(n, VC4_HD_MAI_SMP_N) |
717 VC4_SET_FIELD(m - 1, VC4_HD_MAI_SMP_M));
718 }
719
720 static void vc4_hdmi_set_n_cts(struct vc4_hdmi *hdmi)
721 {
722 struct drm_encoder *encoder = hdmi->encoder;
723 struct drm_crtc *crtc = encoder->crtc;
724 struct drm_device *drm = encoder->dev;
725 struct vc4_dev *vc4 = to_vc4_dev(drm);
726 const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
727 u32 samplerate = hdmi->audio.samplerate;
728 u32 n, cts;
729 u64 tmp;
730
731 n = 128 * samplerate / 1000;
732 tmp = (u64)(mode->clock * 1000) * n;
733 do_div(tmp, 128 * samplerate);
734 cts = tmp;
735
736 HDMI_WRITE(VC4_HDMI_CRP_CFG,
737 VC4_HDMI_CRP_CFG_EXTERNAL_CTS_EN |
738 VC4_SET_FIELD(n, VC4_HDMI_CRP_CFG_N));
739
740 /*
741 * We could get slightly more accurate clocks in some cases by
742 * providing a CTS_1 value. The two CTS values are alternated
743 * between based on the period fields
744 */
745 HDMI_WRITE(VC4_HDMI_CTS_0, cts);
746 HDMI_WRITE(VC4_HDMI_CTS_1, cts);
747 }
748
749 static inline struct vc4_hdmi *dai_to_hdmi(struct snd_soc_dai *dai)
750 {
751 struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
752
753 return snd_soc_card_get_drvdata(card);
754 }
755
756 static int vc4_hdmi_audio_startup(struct snd_pcm_substream *substream,
757 struct snd_soc_dai *dai)
758 {
759 struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
760 struct drm_encoder *encoder = hdmi->encoder;
761 struct vc4_dev *vc4 = to_vc4_dev(encoder->dev);
762 int ret;
763
764 if (hdmi->audio.substream && hdmi->audio.substream != substream)
765 return -EINVAL;
766
767 hdmi->audio.substream = substream;
768
769 /*
770 * If the HDMI encoder hasn't probed, or the encoder is
771 * currently in DVI mode, treat the codec dai as missing.
772 */
773 if (!encoder->crtc || !(HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) &
774 VC4_HDMI_RAM_PACKET_ENABLE))
775 return -ENODEV;
776
777 ret = snd_pcm_hw_constraint_eld(substream->runtime,
778 hdmi->connector->eld);
779 if (ret)
780 return ret;
781
782 return 0;
783 }
784
785 static int vc4_hdmi_audio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
786 {
787 return 0;
788 }
789
790 static void vc4_hdmi_audio_reset(struct vc4_hdmi *hdmi)
791 {
792 struct drm_encoder *encoder = hdmi->encoder;
793 struct drm_device *drm = encoder->dev;
794 struct device *dev = &hdmi->pdev->dev;
795 struct vc4_dev *vc4 = to_vc4_dev(drm);
796 int ret;
797
798 ret = vc4_hdmi_stop_packet(encoder, HDMI_INFOFRAME_TYPE_AUDIO);
799 if (ret)
800 dev_err(dev, "Failed to stop audio infoframe: %d\n", ret);
801
802 HD_WRITE(VC4_HD_MAI_CTL, VC4_HD_MAI_CTL_RESET);
803 HD_WRITE(VC4_HD_MAI_CTL, VC4_HD_MAI_CTL_ERRORF);
804 HD_WRITE(VC4_HD_MAI_CTL, VC4_HD_MAI_CTL_FLUSH);
805 }
806
807 static void vc4_hdmi_audio_shutdown(struct snd_pcm_substream *substream,
808 struct snd_soc_dai *dai)
809 {
810 struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
811
812 if (substream != hdmi->audio.substream)
813 return;
814
815 vc4_hdmi_audio_reset(hdmi);
816
817 hdmi->audio.substream = NULL;
818 }
819
820 /* HDMI audio codec callbacks */
821 static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
822 struct snd_pcm_hw_params *params,
823 struct snd_soc_dai *dai)
824 {
825 struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
826 struct drm_encoder *encoder = hdmi->encoder;
827 struct drm_device *drm = encoder->dev;
828 struct device *dev = &hdmi->pdev->dev;
829 struct vc4_dev *vc4 = to_vc4_dev(drm);
830 u32 audio_packet_config, channel_mask;
831 u32 channel_map, i;
832
833 if (substream != hdmi->audio.substream)
834 return -EINVAL;
835
836 dev_dbg(dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
837 params_rate(params), params_width(params),
838 params_channels(params));
839
840 hdmi->audio.channels = params_channels(params);
841 hdmi->audio.samplerate = params_rate(params);
842
843 HD_WRITE(VC4_HD_MAI_CTL,
844 VC4_HD_MAI_CTL_RESET |
845 VC4_HD_MAI_CTL_FLUSH |
846 VC4_HD_MAI_CTL_DLATE |
847 VC4_HD_MAI_CTL_ERRORE |
848 VC4_HD_MAI_CTL_ERRORF);
849
850 vc4_hdmi_audio_set_mai_clock(hdmi);
851
852 audio_packet_config =
853 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_SAMPLE_FLAT |
854 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_INACTIVE_CHANNELS |
855 VC4_SET_FIELD(0xf, VC4_HDMI_AUDIO_PACKET_B_FRAME_IDENTIFIER);
856
857 channel_mask = GENMASK(hdmi->audio.channels - 1, 0);
858 audio_packet_config |= VC4_SET_FIELD(channel_mask,
859 VC4_HDMI_AUDIO_PACKET_CEA_MASK);
860
861 /* Set the MAI threshold. This logic mimics the firmware's. */
862 if (hdmi->audio.samplerate > 96000) {
863 HD_WRITE(VC4_HD_MAI_THR,
864 VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQHIGH) |
865 VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQLOW));
866 } else if (hdmi->audio.samplerate > 48000) {
867 HD_WRITE(VC4_HD_MAI_THR,
868 VC4_SET_FIELD(0x14, VC4_HD_MAI_THR_DREQHIGH) |
869 VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQLOW));
870 } else {
871 HD_WRITE(VC4_HD_MAI_THR,
872 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICHIGH) |
873 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICLOW) |
874 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQHIGH) |
875 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQLOW));
876 }
877
878 HDMI_WRITE(VC4_HDMI_MAI_CONFIG,
879 VC4_HDMI_MAI_CONFIG_BIT_REVERSE |
880 VC4_SET_FIELD(channel_mask, VC4_HDMI_MAI_CHANNEL_MASK));
881
882 channel_map = 0;
883 for (i = 0; i < 8; i++) {
884 if (channel_mask & BIT(i))
885 channel_map |= i << (3 * i);
886 }
887
888 HDMI_WRITE(VC4_HDMI_MAI_CHANNEL_MAP, channel_map);
889 HDMI_WRITE(VC4_HDMI_AUDIO_PACKET_CONFIG, audio_packet_config);
890 vc4_hdmi_set_n_cts(hdmi);
891
892 return 0;
893 }
894
895 static int vc4_hdmi_audio_trigger(struct snd_pcm_substream *substream, int cmd,
896 struct snd_soc_dai *dai)
897 {
898 struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
899 struct drm_encoder *encoder = hdmi->encoder;
900 struct drm_device *drm = encoder->dev;
901 struct vc4_dev *vc4 = to_vc4_dev(drm);
902
903 switch (cmd) {
904 case SNDRV_PCM_TRIGGER_START:
905 vc4_hdmi_set_audio_infoframe(encoder);
906 HDMI_WRITE(VC4_HDMI_TX_PHY_CTL0,
907 HDMI_READ(VC4_HDMI_TX_PHY_CTL0) &
908 ~VC4_HDMI_TX_PHY_RNG_PWRDN);
909 HD_WRITE(VC4_HD_MAI_CTL,
910 VC4_SET_FIELD(hdmi->audio.channels,
911 VC4_HD_MAI_CTL_CHNUM) |
912 VC4_HD_MAI_CTL_ENABLE);
913 break;
914 case SNDRV_PCM_TRIGGER_STOP:
915 HD_WRITE(VC4_HD_MAI_CTL,
916 VC4_HD_MAI_CTL_DLATE |
917 VC4_HD_MAI_CTL_ERRORE |
918 VC4_HD_MAI_CTL_ERRORF);
919 HDMI_WRITE(VC4_HDMI_TX_PHY_CTL0,
920 HDMI_READ(VC4_HDMI_TX_PHY_CTL0) |
921 VC4_HDMI_TX_PHY_RNG_PWRDN);
922 break;
923 default:
924 break;
925 }
926
927 return 0;
928 }
929
930 static inline struct vc4_hdmi *
931 snd_component_to_hdmi(struct snd_soc_component *component)
932 {
933 struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
934
935 return snd_soc_card_get_drvdata(card);
936 }
937
938 static int vc4_hdmi_audio_eld_ctl_info(struct snd_kcontrol *kcontrol,
939 struct snd_ctl_elem_info *uinfo)
940 {
941 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
942 struct vc4_hdmi *hdmi = snd_component_to_hdmi(component);
943
944 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
945 uinfo->count = sizeof(hdmi->connector->eld);
946
947 return 0;
948 }
949
950 static int vc4_hdmi_audio_eld_ctl_get(struct snd_kcontrol *kcontrol,
951 struct snd_ctl_elem_value *ucontrol)
952 {
953 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
954 struct vc4_hdmi *hdmi = snd_component_to_hdmi(component);
955
956 memcpy(ucontrol->value.bytes.data, hdmi->connector->eld,
957 sizeof(hdmi->connector->eld));
958
959 return 0;
960 }
961
962 static const struct snd_kcontrol_new vc4_hdmi_audio_controls[] = {
963 {
964 .access = SNDRV_CTL_ELEM_ACCESS_READ |
965 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
966 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
967 .name = "ELD",
968 .info = vc4_hdmi_audio_eld_ctl_info,
969 .get = vc4_hdmi_audio_eld_ctl_get,
970 },
971 };
972
973 static const struct snd_soc_dapm_widget vc4_hdmi_audio_widgets[] = {
974 SND_SOC_DAPM_OUTPUT("TX"),
975 };
976
977 static const struct snd_soc_dapm_route vc4_hdmi_audio_routes[] = {
978 { "TX", NULL, "Playback" },
979 };
980
981 static const struct snd_soc_component_driver vc4_hdmi_audio_component_drv = {
982 .controls = vc4_hdmi_audio_controls,
983 .num_controls = ARRAY_SIZE(vc4_hdmi_audio_controls),
984 .dapm_widgets = vc4_hdmi_audio_widgets,
985 .num_dapm_widgets = ARRAY_SIZE(vc4_hdmi_audio_widgets),
986 .dapm_routes = vc4_hdmi_audio_routes,
987 .num_dapm_routes = ARRAY_SIZE(vc4_hdmi_audio_routes),
988 .idle_bias_on = 1,
989 .use_pmdown_time = 1,
990 .endianness = 1,
991 .non_legacy_dai_naming = 1,
992 };
993
994 static const struct snd_soc_dai_ops vc4_hdmi_audio_dai_ops = {
995 .startup = vc4_hdmi_audio_startup,
996 .shutdown = vc4_hdmi_audio_shutdown,
997 .hw_params = vc4_hdmi_audio_hw_params,
998 .set_fmt = vc4_hdmi_audio_set_fmt,
999 .trigger = vc4_hdmi_audio_trigger,
1000 };
1001
1002 static struct snd_soc_dai_driver vc4_hdmi_audio_codec_dai_drv = {
1003 .name = "vc4-hdmi-hifi",
1004 .playback = {
1005 .stream_name = "Playback",
1006 .channels_min = 2,
1007 .channels_max = 8,
1008 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
1009 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
1010 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
1011 SNDRV_PCM_RATE_192000,
1012 .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
1013 },
1014 };
1015
1016 static const struct snd_soc_component_driver vc4_hdmi_audio_cpu_dai_comp = {
1017 .name = "vc4-hdmi-cpu-dai-component",
1018 };
1019
1020 static int vc4_hdmi_audio_cpu_dai_probe(struct snd_soc_dai *dai)
1021 {
1022 struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
1023
1024 snd_soc_dai_init_dma_data(dai, &hdmi->audio.dma_data, NULL);
1025
1026 return 0;
1027 }
1028
1029 static struct snd_soc_dai_driver vc4_hdmi_audio_cpu_dai_drv = {
1030 .name = "vc4-hdmi-cpu-dai",
1031 .probe = vc4_hdmi_audio_cpu_dai_probe,
1032 .playback = {
1033 .stream_name = "Playback",
1034 .channels_min = 1,
1035 .channels_max = 8,
1036 .rates = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |
1037 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |
1038 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 |
1039 SNDRV_PCM_RATE_192000,
1040 .formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
1041 },
1042 .ops = &vc4_hdmi_audio_dai_ops,
1043 };
1044
1045 static const struct snd_dmaengine_pcm_config pcm_conf = {
1046 .chan_names[SNDRV_PCM_STREAM_PLAYBACK] = "audio-rx",
1047 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
1048 };
1049
1050 static int vc4_hdmi_audio_init(struct vc4_hdmi *hdmi)
1051 {
1052 struct snd_soc_dai_link *dai_link = &hdmi->audio.link;
1053 struct snd_soc_card *card = &hdmi->audio.card;
1054 struct device *dev = &hdmi->pdev->dev;
1055 const __be32 *addr;
1056 int ret;
1057
1058 if (!of_find_property(dev->of_node, "dmas", NULL)) {
1059 dev_warn(dev,
1060 "'dmas' DT property is missing, no HDMI audio\n");
1061 return 0;
1062 }
1063
1064 /*
1065 * Get the physical address of VC4_HD_MAI_DATA. We need to retrieve
1066 * the bus address specified in the DT, because the physical address
1067 * (the one returned by platform_get_resource()) is not appropriate
1068 * for DMA transfers.
1069 * This VC/MMU should probably be exposed to avoid this kind of hacks.
1070 */
1071 addr = of_get_address(dev->of_node, 1, NULL, NULL);
1072 hdmi->audio.dma_data.addr = be32_to_cpup(addr) + VC4_HD_MAI_DATA;
1073 hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
1074 hdmi->audio.dma_data.maxburst = 2;
1075
1076 ret = devm_snd_dmaengine_pcm_register(dev, &pcm_conf, 0);
1077 if (ret) {
1078 dev_err(dev, "Could not register PCM component: %d\n", ret);
1079 return ret;
1080 }
1081
1082 ret = devm_snd_soc_register_component(dev, &vc4_hdmi_audio_cpu_dai_comp,
1083 &vc4_hdmi_audio_cpu_dai_drv, 1);
1084 if (ret) {
1085 dev_err(dev, "Could not register CPU DAI: %d\n", ret);
1086 return ret;
1087 }
1088
1089 /* register component and codec dai */
1090 ret = devm_snd_soc_register_component(dev, &vc4_hdmi_audio_component_drv,
1091 &vc4_hdmi_audio_codec_dai_drv, 1);
1092 if (ret) {
1093 dev_err(dev, "Could not register component: %d\n", ret);
1094 return ret;
1095 }
1096
1097 dai_link->cpus = &hdmi->audio.cpu;
1098 dai_link->codecs = &hdmi->audio.codec;
1099 dai_link->platforms = &hdmi->audio.platform;
1100
1101 dai_link->num_cpus = 1;
1102 dai_link->num_codecs = 1;
1103 dai_link->num_platforms = 1;
1104
1105 dai_link->name = "MAI";
1106 dai_link->stream_name = "MAI PCM";
1107 dai_link->codecs->dai_name = vc4_hdmi_audio_codec_dai_drv.name;
1108 dai_link->cpus->dai_name = dev_name(dev);
1109 dai_link->codecs->name = dev_name(dev);
1110 dai_link->platforms->name = dev_name(dev);
1111
1112 card->dai_link = dai_link;
1113 card->num_links = 1;
1114 card->name = "vc4-hdmi";
1115 card->dev = dev;
1116
1117 /*
1118 * Be careful, snd_soc_register_card() calls dev_set_drvdata() and
1119 * stores a pointer to the snd card object in dev->driver_data. This
1120 * means we cannot use it for something else. The hdmi back-pointer is
1121 * now stored in card->drvdata and should be retrieved with
1122 * snd_soc_card_get_drvdata() if needed.
1123 */
1124 snd_soc_card_set_drvdata(card, hdmi);
1125 ret = devm_snd_soc_register_card(dev, card);
1126 if (ret)
1127 dev_err(dev, "Could not register sound card: %d\n", ret);
1128
1129 return ret;
1130
1131 }
1132
1133 #ifdef CONFIG_DRM_VC4_HDMI_CEC
1134 static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv)
1135 {
1136 struct vc4_dev *vc4 = priv;
1137 struct vc4_hdmi *hdmi = vc4->hdmi;
1138
1139 if (hdmi->cec_irq_was_rx) {
1140 if (hdmi->cec_rx_msg.len)
1141 cec_received_msg(hdmi->cec_adap, &hdmi->cec_rx_msg);
1142 } else if (hdmi->cec_tx_ok) {
1143 cec_transmit_done(hdmi->cec_adap, CEC_TX_STATUS_OK,
1144 0, 0, 0, 0);
1145 } else {
1146 /*
1147 * This CEC implementation makes 1 retry, so if we
1148 * get a NACK, then that means it made 2 attempts.
1149 */
1150 cec_transmit_done(hdmi->cec_adap, CEC_TX_STATUS_NACK,
1151 0, 2, 0, 0);
1152 }
1153 return IRQ_HANDLED;
1154 }
1155
1156 static void vc4_cec_read_msg(struct vc4_dev *vc4, u32 cntrl1)
1157 {
1158 struct cec_msg *msg = &vc4->hdmi->cec_rx_msg;
1159 unsigned int i;
1160
1161 msg->len = 1 + ((cntrl1 & VC4_HDMI_CEC_REC_WRD_CNT_MASK) >>
1162 VC4_HDMI_CEC_REC_WRD_CNT_SHIFT);
1163 for (i = 0; i < msg->len; i += 4) {
1164 u32 val = HDMI_READ(VC4_HDMI_CEC_RX_DATA_1 + i);
1165
1166 msg->msg[i] = val & 0xff;
1167 msg->msg[i + 1] = (val >> 8) & 0xff;
1168 msg->msg[i + 2] = (val >> 16) & 0xff;
1169 msg->msg[i + 3] = (val >> 24) & 0xff;
1170 }
1171 }
1172
1173 static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
1174 {
1175 struct vc4_dev *vc4 = priv;
1176 struct vc4_hdmi *hdmi = vc4->hdmi;
1177 u32 stat = HDMI_READ(VC4_HDMI_CPU_STATUS);
1178 u32 cntrl1, cntrl5;
1179
1180 if (!(stat & VC4_HDMI_CPU_CEC))
1181 return IRQ_NONE;
1182 hdmi->cec_rx_msg.len = 0;
1183 cntrl1 = HDMI_READ(VC4_HDMI_CEC_CNTRL_1);
1184 cntrl5 = HDMI_READ(VC4_HDMI_CEC_CNTRL_5);
1185 hdmi->cec_irq_was_rx = cntrl5 & VC4_HDMI_CEC_RX_CEC_INT;
1186 if (hdmi->cec_irq_was_rx) {
1187 vc4_cec_read_msg(vc4, cntrl1);
1188 cntrl1 |= VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
1189 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, cntrl1);
1190 cntrl1 &= ~VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
1191 } else {
1192 hdmi->cec_tx_ok = cntrl1 & VC4_HDMI_CEC_TX_STATUS_GOOD;
1193 cntrl1 &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
1194 }
1195 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, cntrl1);
1196 HDMI_WRITE(VC4_HDMI_CPU_CLEAR, VC4_HDMI_CPU_CEC);
1197
1198 return IRQ_WAKE_THREAD;
1199 }
1200
1201 static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
1202 {
1203 struct vc4_dev *vc4 = cec_get_drvdata(adap);
1204 /* clock period in microseconds */
1205 const u32 usecs = 1000000 / CEC_CLOCK_FREQ;
1206 u32 val = HDMI_READ(VC4_HDMI_CEC_CNTRL_5);
1207
1208 val &= ~(VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET |
1209 VC4_HDMI_CEC_CNT_TO_4700_US_MASK |
1210 VC4_HDMI_CEC_CNT_TO_4500_US_MASK);
1211 val |= ((4700 / usecs) << VC4_HDMI_CEC_CNT_TO_4700_US_SHIFT) |
1212 ((4500 / usecs) << VC4_HDMI_CEC_CNT_TO_4500_US_SHIFT);
1213
1214 if (enable) {
1215 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_5, val |
1216 VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
1217 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_5, val);
1218 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_2,
1219 ((1500 / usecs) << VC4_HDMI_CEC_CNT_TO_1500_US_SHIFT) |
1220 ((1300 / usecs) << VC4_HDMI_CEC_CNT_TO_1300_US_SHIFT) |
1221 ((800 / usecs) << VC4_HDMI_CEC_CNT_TO_800_US_SHIFT) |
1222 ((600 / usecs) << VC4_HDMI_CEC_CNT_TO_600_US_SHIFT) |
1223 ((400 / usecs) << VC4_HDMI_CEC_CNT_TO_400_US_SHIFT));
1224 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_3,
1225 ((2750 / usecs) << VC4_HDMI_CEC_CNT_TO_2750_US_SHIFT) |
1226 ((2400 / usecs) << VC4_HDMI_CEC_CNT_TO_2400_US_SHIFT) |
1227 ((2050 / usecs) << VC4_HDMI_CEC_CNT_TO_2050_US_SHIFT) |
1228 ((1700 / usecs) << VC4_HDMI_CEC_CNT_TO_1700_US_SHIFT));
1229 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_4,
1230 ((4300 / usecs) << VC4_HDMI_CEC_CNT_TO_4300_US_SHIFT) |
1231 ((3900 / usecs) << VC4_HDMI_CEC_CNT_TO_3900_US_SHIFT) |
1232 ((3600 / usecs) << VC4_HDMI_CEC_CNT_TO_3600_US_SHIFT) |
1233 ((3500 / usecs) << VC4_HDMI_CEC_CNT_TO_3500_US_SHIFT));
1234
1235 HDMI_WRITE(VC4_HDMI_CPU_MASK_CLEAR, VC4_HDMI_CPU_CEC);
1236 } else {
1237 HDMI_WRITE(VC4_HDMI_CPU_MASK_SET, VC4_HDMI_CPU_CEC);
1238 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_5, val |
1239 VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
1240 }
1241 return 0;
1242 }
1243
1244 static int vc4_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
1245 {
1246 struct vc4_dev *vc4 = cec_get_drvdata(adap);
1247
1248 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1,
1249 (HDMI_READ(VC4_HDMI_CEC_CNTRL_1) & ~VC4_HDMI_CEC_ADDR_MASK) |
1250 (log_addr & 0xf) << VC4_HDMI_CEC_ADDR_SHIFT);
1251 return 0;
1252 }
1253
1254 static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
1255 u32 signal_free_time, struct cec_msg *msg)
1256 {
1257 struct vc4_dev *vc4 = cec_get_drvdata(adap);
1258 u32 val;
1259 unsigned int i;
1260
1261 for (i = 0; i < msg->len; i += 4)
1262 HDMI_WRITE(VC4_HDMI_CEC_TX_DATA_1 + i,
1263 (msg->msg[i]) |
1264 (msg->msg[i + 1] << 8) |
1265 (msg->msg[i + 2] << 16) |
1266 (msg->msg[i + 3] << 24));
1267
1268 val = HDMI_READ(VC4_HDMI_CEC_CNTRL_1);
1269 val &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
1270 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, val);
1271 val &= ~VC4_HDMI_CEC_MESSAGE_LENGTH_MASK;
1272 val |= (msg->len - 1) << VC4_HDMI_CEC_MESSAGE_LENGTH_SHIFT;
1273 val |= VC4_HDMI_CEC_START_XMIT_BEGIN;
1274
1275 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, val);
1276 return 0;
1277 }
1278
1279 static const struct cec_adap_ops vc4_hdmi_cec_adap_ops = {
1280 .adap_enable = vc4_hdmi_cec_adap_enable,
1281 .adap_log_addr = vc4_hdmi_cec_adap_log_addr,
1282 .adap_transmit = vc4_hdmi_cec_adap_transmit,
1283 };
1284 #endif
1285
1286 static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
1287 {
1288 #ifdef CONFIG_DRM_VC4_HDMI_CEC
1289 struct cec_connector_info conn_info;
1290 #endif
1291 struct platform_device *pdev = to_platform_device(dev);
1292 struct drm_device *drm = dev_get_drvdata(master);
1293 struct vc4_dev *vc4 = drm->dev_private;
1294 struct vc4_hdmi *hdmi;
1295 struct vc4_hdmi_encoder *vc4_hdmi_encoder;
1296 struct device_node *ddc_node;
1297 u32 value;
1298 int ret;
1299
1300 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1301 if (!hdmi)
1302 return -ENOMEM;
1303
1304 vc4_hdmi_encoder = devm_kzalloc(dev, sizeof(*vc4_hdmi_encoder),
1305 GFP_KERNEL);
1306 if (!vc4_hdmi_encoder)
1307 return -ENOMEM;
1308 vc4_hdmi_encoder->base.type = VC4_ENCODER_TYPE_HDMI;
1309 hdmi->encoder = &vc4_hdmi_encoder->base.base;
1310
1311 hdmi->pdev = pdev;
1312 hdmi->hdmicore_regs = vc4_ioremap_regs(pdev, 0);
1313 if (IS_ERR(hdmi->hdmicore_regs))
1314 return PTR_ERR(hdmi->hdmicore_regs);
1315
1316 hdmi->hd_regs = vc4_ioremap_regs(pdev, 1);
1317 if (IS_ERR(hdmi->hd_regs))
1318 return PTR_ERR(hdmi->hd_regs);
1319
1320 hdmi->hdmi_regset.base = hdmi->hdmicore_regs;
1321 hdmi->hdmi_regset.regs = hdmi_regs;
1322 hdmi->hdmi_regset.nregs = ARRAY_SIZE(hdmi_regs);
1323 hdmi->hd_regset.base = hdmi->hd_regs;
1324 hdmi->hd_regset.regs = hd_regs;
1325 hdmi->hd_regset.nregs = ARRAY_SIZE(hd_regs);
1326
1327 hdmi->pixel_clock = devm_clk_get(dev, "pixel");
1328 if (IS_ERR(hdmi->pixel_clock)) {
1329 DRM_ERROR("Failed to get pixel clock\n");
1330 return PTR_ERR(hdmi->pixel_clock);
1331 }
1332 hdmi->hsm_clock = devm_clk_get(dev, "hdmi");
1333 if (IS_ERR(hdmi->hsm_clock)) {
1334 DRM_ERROR("Failed to get HDMI state machine clock\n");
1335 return PTR_ERR(hdmi->hsm_clock);
1336 }
1337
1338 ddc_node = of_parse_phandle(dev->of_node, "ddc", 0);
1339 if (!ddc_node) {
1340 DRM_ERROR("Failed to find ddc node in device tree\n");
1341 return -ENODEV;
1342 }
1343
1344 hdmi->ddc = of_find_i2c_adapter_by_node(ddc_node);
1345 of_node_put(ddc_node);
1346 if (!hdmi->ddc) {
1347 DRM_DEBUG("Failed to get ddc i2c adapter by node\n");
1348 return -EPROBE_DEFER;
1349 }
1350
1351 /* This is the rate that is set by the firmware. The number
1352 * needs to be a bit higher than the pixel clock rate
1353 * (generally 148.5Mhz).
1354 */
1355 ret = clk_set_rate(hdmi->hsm_clock, HSM_CLOCK_FREQ);
1356 if (ret) {
1357 DRM_ERROR("Failed to set HSM clock rate: %d\n", ret);
1358 goto err_put_i2c;
1359 }
1360
1361 ret = clk_prepare_enable(hdmi->hsm_clock);
1362 if (ret) {
1363 DRM_ERROR("Failed to turn on HDMI state machine clock: %d\n",
1364 ret);
1365 goto err_put_i2c;
1366 }
1367
1368 /* Only use the GPIO HPD pin if present in the DT, otherwise
1369 * we'll use the HDMI core's register.
1370 */
1371 if (of_find_property(dev->of_node, "hpd-gpios", &value)) {
1372 enum of_gpio_flags hpd_gpio_flags;
1373
1374 hdmi->hpd_gpio = of_get_named_gpio_flags(dev->of_node,
1375 "hpd-gpios", 0,
1376 &hpd_gpio_flags);
1377 if (hdmi->hpd_gpio < 0) {
1378 ret = hdmi->hpd_gpio;
1379 goto err_unprepare_hsm;
1380 }
1381
1382 hdmi->hpd_active_low = hpd_gpio_flags & OF_GPIO_ACTIVE_LOW;
1383 }
1384
1385 vc4->hdmi = hdmi;
1386
1387 /* HDMI core must be enabled. */
1388 if (!(HD_READ(VC4_HD_M_CTL) & VC4_HD_M_ENABLE)) {
1389 HD_WRITE(VC4_HD_M_CTL, VC4_HD_M_SW_RST);
1390 udelay(1);
1391 HD_WRITE(VC4_HD_M_CTL, 0);
1392
1393 HD_WRITE(VC4_HD_M_CTL, VC4_HD_M_ENABLE);
1394 }
1395 pm_runtime_enable(dev);
1396
1397 drm_encoder_init(drm, hdmi->encoder, &vc4_hdmi_encoder_funcs,
1398 DRM_MODE_ENCODER_TMDS, NULL);
1399 drm_encoder_helper_add(hdmi->encoder, &vc4_hdmi_encoder_helper_funcs);
1400
1401 hdmi->connector =
1402 vc4_hdmi_connector_init(drm, hdmi->encoder, hdmi->ddc);
1403 if (IS_ERR(hdmi->connector)) {
1404 ret = PTR_ERR(hdmi->connector);
1405 goto err_destroy_encoder;
1406 }
1407 #ifdef CONFIG_DRM_VC4_HDMI_CEC
1408 hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
1409 vc4, "vc4",
1410 CEC_CAP_DEFAULTS |
1411 CEC_CAP_CONNECTOR_INFO, 1);
1412 ret = PTR_ERR_OR_ZERO(hdmi->cec_adap);
1413 if (ret < 0)
1414 goto err_destroy_conn;
1415
1416 cec_fill_conn_info_from_drm(&conn_info, hdmi->connector);
1417 cec_s_conn_info(hdmi->cec_adap, &conn_info);
1418
1419 HDMI_WRITE(VC4_HDMI_CPU_MASK_SET, 0xffffffff);
1420 value = HDMI_READ(VC4_HDMI_CEC_CNTRL_1);
1421 value &= ~VC4_HDMI_CEC_DIV_CLK_CNT_MASK;
1422 /*
1423 * Set the logical address to Unregistered and set the clock
1424 * divider: the hsm_clock rate and this divider setting will
1425 * give a 40 kHz CEC clock.
1426 */
1427 value |= VC4_HDMI_CEC_ADDR_MASK |
1428 (4091 << VC4_HDMI_CEC_DIV_CLK_CNT_SHIFT);
1429 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, value);
1430 ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0),
1431 vc4_cec_irq_handler,
1432 vc4_cec_irq_handler_thread, 0,
1433 "vc4 hdmi cec", vc4);
1434 if (ret)
1435 goto err_delete_cec_adap;
1436 ret = cec_register_adapter(hdmi->cec_adap, dev);
1437 if (ret < 0)
1438 goto err_delete_cec_adap;
1439 #endif
1440
1441 ret = vc4_hdmi_audio_init(hdmi);
1442 if (ret)
1443 goto err_destroy_encoder;
1444
1445 vc4_debugfs_add_file(drm, "hdmi_regs", vc4_hdmi_debugfs_regs, hdmi);
1446
1447 return 0;
1448
1449 #ifdef CONFIG_DRM_VC4_HDMI_CEC
1450 err_delete_cec_adap:
1451 cec_delete_adapter(hdmi->cec_adap);
1452 err_destroy_conn:
1453 vc4_hdmi_connector_destroy(hdmi->connector);
1454 #endif
1455 err_destroy_encoder:
1456 vc4_hdmi_encoder_destroy(hdmi->encoder);
1457 err_unprepare_hsm:
1458 clk_disable_unprepare(hdmi->hsm_clock);
1459 pm_runtime_disable(dev);
1460 err_put_i2c:
1461 put_device(&hdmi->ddc->dev);
1462
1463 return ret;
1464 }
1465
1466 static void vc4_hdmi_unbind(struct device *dev, struct device *master,
1467 void *data)
1468 {
1469 struct drm_device *drm = dev_get_drvdata(master);
1470 struct vc4_dev *vc4 = drm->dev_private;
1471 struct vc4_hdmi *hdmi = vc4->hdmi;
1472
1473 cec_unregister_adapter(hdmi->cec_adap);
1474 vc4_hdmi_connector_destroy(hdmi->connector);
1475 vc4_hdmi_encoder_destroy(hdmi->encoder);
1476
1477 clk_disable_unprepare(hdmi->hsm_clock);
1478 pm_runtime_disable(dev);
1479
1480 put_device(&hdmi->ddc->dev);
1481
1482 vc4->hdmi = NULL;
1483 }
1484
1485 static const struct component_ops vc4_hdmi_ops = {
1486 .bind = vc4_hdmi_bind,
1487 .unbind = vc4_hdmi_unbind,
1488 };
1489
1490 static int vc4_hdmi_dev_probe(struct platform_device *pdev)
1491 {
1492 return component_add(&pdev->dev, &vc4_hdmi_ops);
1493 }
1494
1495 static int vc4_hdmi_dev_remove(struct platform_device *pdev)
1496 {
1497 component_del(&pdev->dev, &vc4_hdmi_ops);
1498 return 0;
1499 }
1500
1501 static const struct of_device_id vc4_hdmi_dt_match[] = {
1502 { .compatible = "brcm,bcm2835-hdmi" },
1503 {}
1504 };
1505
1506 struct platform_driver vc4_hdmi_driver = {
1507 .probe = vc4_hdmi_dev_probe,
1508 .remove = vc4_hdmi_dev_remove,
1509 .driver = {
1510 .name = "vc4_hdmi",
1511 .of_match_table = vc4_hdmi_dt_match,
1512 },
1513 };
Linux with added FPC-III support