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[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / vc4 / vc4_hdmi.c
1 /*
2 * Copyright (C) 2015 Broadcom
3 * Copyright (c) 2014 The Linux Foundation. All rights reserved.
4 * Copyright (C) 2013 Red Hat
5 * Author: Rob Clark <robdclark@gmail.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License version 2 as published by
9 * the Free Software Foundation.
10 *
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
14 * more details.
15 *
16 * You should have received a copy of the GNU General Public License along with
17 * this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 /**
21 * DOC: VC4 Falcon HDMI module
22 *
23 * The HDMI core has a state machine and a PHY. On BCM2835, most of
24 * the unit operates off of the HSM clock from CPRMAN. It also
25 * internally uses the PLLH_PIX clock for the PHY.
26 *
27 * HDMI infoframes are kept within a small packet ram, where each
28 * packet can be individually enabled for including in a frame.
29 *
30 * HDMI audio is implemented entirely within the HDMI IP block. A
31 * register in the HDMI encoder takes SPDIF frames from the DMA engine
32 * and transfers them over an internal MAI (multi-channel audio
33 * interconnect) bus to the encoder side for insertion into the video
34 * blank regions.
35 *
36 * The driver's HDMI encoder does not yet support power management.
37 * The HDMI encoder's power domain and the HSM/pixel clocks are kept
38 * continuously running, and only the HDMI logic and packet ram are
39 * powered off/on at disable/enable time.
40 *
41 * The driver does not yet support CEC control, though the HDMI
42 * encoder block has CEC support.
43 */
44
45 #include <drm/drm_atomic_helper.h>
46 #include <drm/drm_crtc_helper.h>
47 #include <drm/drm_edid.h>
48 #include <linux/clk.h>
49 #include <linux/component.h>
50 #include <linux/i2c.h>
51 #include <linux/of_address.h>
52 #include <linux/of_gpio.h>
53 #include <linux/of_platform.h>
54 #include <linux/pm_runtime.h>
55 #include <linux/rational.h>
56 #include <sound/dmaengine_pcm.h>
57 #include <sound/pcm_drm_eld.h>
58 #include <sound/pcm_params.h>
59 #include <sound/soc.h>
60 #include "media/cec.h"
61 #include "vc4_drv.h"
62 #include "vc4_regs.h"
63
64 #define HSM_CLOCK_FREQ 163682864
65 #define CEC_CLOCK_FREQ 40000
66 #define CEC_CLOCK_DIV (HSM_CLOCK_FREQ / CEC_CLOCK_FREQ)
67
68 /* HDMI audio information */
69 struct vc4_hdmi_audio {
70 struct snd_soc_card card;
71 struct snd_soc_dai_link link;
72 int samplerate;
73 int channels;
74 struct snd_dmaengine_dai_dma_data dma_data;
75 struct snd_pcm_substream *substream;
76 };
77
78 /* General HDMI hardware state. */
79 struct vc4_hdmi {
80 struct platform_device *pdev;
81
82 struct drm_encoder *encoder;
83 struct drm_connector *connector;
84
85 struct vc4_hdmi_audio audio;
86
87 struct i2c_adapter *ddc;
88 void __iomem *hdmicore_regs;
89 void __iomem *hd_regs;
90 int hpd_gpio;
91 bool hpd_active_low;
92
93 struct cec_adapter *cec_adap;
94 struct cec_msg cec_rx_msg;
95 bool cec_tx_ok;
96 bool cec_irq_was_rx;
97
98 struct clk *pixel_clock;
99 struct clk *hsm_clock;
100 };
101
102 #define HDMI_READ(offset) readl(vc4->hdmi->hdmicore_regs + offset)
103 #define HDMI_WRITE(offset, val) writel(val, vc4->hdmi->hdmicore_regs + offset)
104 #define HD_READ(offset) readl(vc4->hdmi->hd_regs + offset)
105 #define HD_WRITE(offset, val) writel(val, vc4->hdmi->hd_regs + offset)
106
107 /* VC4 HDMI encoder KMS struct */
108 struct vc4_hdmi_encoder {
109 struct vc4_encoder base;
110 bool hdmi_monitor;
111 bool limited_rgb_range;
112 bool rgb_range_selectable;
113 };
114
115 static inline struct vc4_hdmi_encoder *
116 to_vc4_hdmi_encoder(struct drm_encoder *encoder)
117 {
118 return container_of(encoder, struct vc4_hdmi_encoder, base.base);
119 }
120
121 /* VC4 HDMI connector KMS struct */
122 struct vc4_hdmi_connector {
123 struct drm_connector base;
124
125 /* Since the connector is attached to just the one encoder,
126 * this is the reference to it so we can do the best_encoder()
127 * hook.
128 */
129 struct drm_encoder *encoder;
130 };
131
132 static inline struct vc4_hdmi_connector *
133 to_vc4_hdmi_connector(struct drm_connector *connector)
134 {
135 return container_of(connector, struct vc4_hdmi_connector, base);
136 }
137
138 #define HDMI_REG(reg) { reg, #reg }
139 static const struct {
140 u32 reg;
141 const char *name;
142 } hdmi_regs[] = {
143 HDMI_REG(VC4_HDMI_CORE_REV),
144 HDMI_REG(VC4_HDMI_SW_RESET_CONTROL),
145 HDMI_REG(VC4_HDMI_HOTPLUG_INT),
146 HDMI_REG(VC4_HDMI_HOTPLUG),
147 HDMI_REG(VC4_HDMI_MAI_CHANNEL_MAP),
148 HDMI_REG(VC4_HDMI_MAI_CONFIG),
149 HDMI_REG(VC4_HDMI_MAI_FORMAT),
150 HDMI_REG(VC4_HDMI_AUDIO_PACKET_CONFIG),
151 HDMI_REG(VC4_HDMI_RAM_PACKET_CONFIG),
152 HDMI_REG(VC4_HDMI_HORZA),
153 HDMI_REG(VC4_HDMI_HORZB),
154 HDMI_REG(VC4_HDMI_FIFO_CTL),
155 HDMI_REG(VC4_HDMI_SCHEDULER_CONTROL),
156 HDMI_REG(VC4_HDMI_VERTA0),
157 HDMI_REG(VC4_HDMI_VERTA1),
158 HDMI_REG(VC4_HDMI_VERTB0),
159 HDMI_REG(VC4_HDMI_VERTB1),
160 HDMI_REG(VC4_HDMI_TX_PHY_RESET_CTL),
161 HDMI_REG(VC4_HDMI_TX_PHY_CTL0),
162
163 HDMI_REG(VC4_HDMI_CEC_CNTRL_1),
164 HDMI_REG(VC4_HDMI_CEC_CNTRL_2),
165 HDMI_REG(VC4_HDMI_CEC_CNTRL_3),
166 HDMI_REG(VC4_HDMI_CEC_CNTRL_4),
167 HDMI_REG(VC4_HDMI_CEC_CNTRL_5),
168 HDMI_REG(VC4_HDMI_CPU_STATUS),
169 HDMI_REG(VC4_HDMI_CPU_MASK_STATUS),
170
171 HDMI_REG(VC4_HDMI_CEC_RX_DATA_1),
172 HDMI_REG(VC4_HDMI_CEC_RX_DATA_2),
173 HDMI_REG(VC4_HDMI_CEC_RX_DATA_3),
174 HDMI_REG(VC4_HDMI_CEC_RX_DATA_4),
175 HDMI_REG(VC4_HDMI_CEC_TX_DATA_1),
176 HDMI_REG(VC4_HDMI_CEC_TX_DATA_2),
177 HDMI_REG(VC4_HDMI_CEC_TX_DATA_3),
178 HDMI_REG(VC4_HDMI_CEC_TX_DATA_4),
179 };
180
181 static const struct {
182 u32 reg;
183 const char *name;
184 } hd_regs[] = {
185 HDMI_REG(VC4_HD_M_CTL),
186 HDMI_REG(VC4_HD_MAI_CTL),
187 HDMI_REG(VC4_HD_MAI_THR),
188 HDMI_REG(VC4_HD_MAI_FMT),
189 HDMI_REG(VC4_HD_MAI_SMP),
190 HDMI_REG(VC4_HD_VID_CTL),
191 HDMI_REG(VC4_HD_CSC_CTL),
192 HDMI_REG(VC4_HD_FRAME_COUNT),
193 };
194
195 #ifdef CONFIG_DEBUG_FS
196 int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
197 {
198 struct drm_info_node *node = (struct drm_info_node *)m->private;
199 struct drm_device *dev = node->minor->dev;
200 struct vc4_dev *vc4 = to_vc4_dev(dev);
201 int i;
202
203 for (i = 0; i < ARRAY_SIZE(hdmi_regs); i++) {
204 seq_printf(m, "%s (0x%04x): 0x%08x\n",
205 hdmi_regs[i].name, hdmi_regs[i].reg,
206 HDMI_READ(hdmi_regs[i].reg));
207 }
208
209 for (i = 0; i < ARRAY_SIZE(hd_regs); i++) {
210 seq_printf(m, "%s (0x%04x): 0x%08x\n",
211 hd_regs[i].name, hd_regs[i].reg,
212 HD_READ(hd_regs[i].reg));
213 }
214
215 return 0;
216 }
217 #endif /* CONFIG_DEBUG_FS */
218
219 static void vc4_hdmi_dump_regs(struct drm_device *dev)
220 {
221 struct vc4_dev *vc4 = to_vc4_dev(dev);
222 int i;
223
224 for (i = 0; i < ARRAY_SIZE(hdmi_regs); i++) {
225 DRM_INFO("0x%04x (%s): 0x%08x\n",
226 hdmi_regs[i].reg, hdmi_regs[i].name,
227 HDMI_READ(hdmi_regs[i].reg));
228 }
229 for (i = 0; i < ARRAY_SIZE(hd_regs); i++) {
230 DRM_INFO("0x%04x (%s): 0x%08x\n",
231 hd_regs[i].reg, hd_regs[i].name,
232 HD_READ(hd_regs[i].reg));
233 }
234 }
235
236 static enum drm_connector_status
237 vc4_hdmi_connector_detect(struct drm_connector *connector, bool force)
238 {
239 struct drm_device *dev = connector->dev;
240 struct vc4_dev *vc4 = to_vc4_dev(dev);
241
242 if (vc4->hdmi->hpd_gpio) {
243 if (gpio_get_value_cansleep(vc4->hdmi->hpd_gpio) ^
244 vc4->hdmi->hpd_active_low)
245 return connector_status_connected;
246 cec_phys_addr_invalidate(vc4->hdmi->cec_adap);
247 return connector_status_disconnected;
248 }
249
250 if (drm_probe_ddc(vc4->hdmi->ddc))
251 return connector_status_connected;
252
253 if (HDMI_READ(VC4_HDMI_HOTPLUG) & VC4_HDMI_HOTPLUG_CONNECTED)
254 return connector_status_connected;
255 cec_phys_addr_invalidate(vc4->hdmi->cec_adap);
256 return connector_status_disconnected;
257 }
258
259 static void vc4_hdmi_connector_destroy(struct drm_connector *connector)
260 {
261 drm_connector_unregister(connector);
262 drm_connector_cleanup(connector);
263 }
264
265 static int vc4_hdmi_connector_get_modes(struct drm_connector *connector)
266 {
267 struct vc4_hdmi_connector *vc4_connector =
268 to_vc4_hdmi_connector(connector);
269 struct drm_encoder *encoder = vc4_connector->encoder;
270 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
271 struct drm_device *dev = connector->dev;
272 struct vc4_dev *vc4 = to_vc4_dev(dev);
273 int ret = 0;
274 struct edid *edid;
275
276 edid = drm_get_edid(connector, vc4->hdmi->ddc);
277 cec_s_phys_addr_from_edid(vc4->hdmi->cec_adap, edid);
278 if (!edid)
279 return -ENODEV;
280
281 vc4_encoder->hdmi_monitor = drm_detect_hdmi_monitor(edid);
282
283 if (edid && edid->input & DRM_EDID_INPUT_DIGITAL) {
284 vc4_encoder->rgb_range_selectable =
285 drm_rgb_quant_range_selectable(edid);
286 }
287
288 drm_mode_connector_update_edid_property(connector, edid);
289 ret = drm_add_edid_modes(connector, edid);
290 drm_edid_to_eld(connector, edid);
291 kfree(edid);
292
293 return ret;
294 }
295
296 static const struct drm_connector_funcs vc4_hdmi_connector_funcs = {
297 .detect = vc4_hdmi_connector_detect,
298 .fill_modes = drm_helper_probe_single_connector_modes,
299 .destroy = vc4_hdmi_connector_destroy,
300 .reset = drm_atomic_helper_connector_reset,
301 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
302 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
303 };
304
305 static const struct drm_connector_helper_funcs vc4_hdmi_connector_helper_funcs = {
306 .get_modes = vc4_hdmi_connector_get_modes,
307 };
308
309 static struct drm_connector *vc4_hdmi_connector_init(struct drm_device *dev,
310 struct drm_encoder *encoder)
311 {
312 struct drm_connector *connector;
313 struct vc4_hdmi_connector *hdmi_connector;
314
315 hdmi_connector = devm_kzalloc(dev->dev, sizeof(*hdmi_connector),
316 GFP_KERNEL);
317 if (!hdmi_connector)
318 return ERR_PTR(-ENOMEM);
319 connector = &hdmi_connector->base;
320
321 hdmi_connector->encoder = encoder;
322
323 drm_connector_init(dev, connector, &vc4_hdmi_connector_funcs,
324 DRM_MODE_CONNECTOR_HDMIA);
325 drm_connector_helper_add(connector, &vc4_hdmi_connector_helper_funcs);
326
327 connector->polled = (DRM_CONNECTOR_POLL_CONNECT |
328 DRM_CONNECTOR_POLL_DISCONNECT);
329
330 connector->interlace_allowed = 1;
331 connector->doublescan_allowed = 0;
332
333 drm_mode_connector_attach_encoder(connector, encoder);
334
335 return connector;
336 }
337
338 static void vc4_hdmi_encoder_destroy(struct drm_encoder *encoder)
339 {
340 drm_encoder_cleanup(encoder);
341 }
342
343 static const struct drm_encoder_funcs vc4_hdmi_encoder_funcs = {
344 .destroy = vc4_hdmi_encoder_destroy,
345 };
346
347 static int vc4_hdmi_stop_packet(struct drm_encoder *encoder,
348 enum hdmi_infoframe_type type)
349 {
350 struct drm_device *dev = encoder->dev;
351 struct vc4_dev *vc4 = to_vc4_dev(dev);
352 u32 packet_id = type - 0x80;
353
354 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
355 HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) & ~BIT(packet_id));
356
357 return wait_for(!(HDMI_READ(VC4_HDMI_RAM_PACKET_STATUS) &
358 BIT(packet_id)), 100);
359 }
360
361 static void vc4_hdmi_write_infoframe(struct drm_encoder *encoder,
362 union hdmi_infoframe *frame)
363 {
364 struct drm_device *dev = encoder->dev;
365 struct vc4_dev *vc4 = to_vc4_dev(dev);
366 u32 packet_id = frame->any.type - 0x80;
367 u32 packet_reg = VC4_HDMI_RAM_PACKET(packet_id);
368 uint8_t buffer[VC4_HDMI_PACKET_STRIDE];
369 ssize_t len, i;
370 int ret;
371
372 WARN_ONCE(!(HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) &
373 VC4_HDMI_RAM_PACKET_ENABLE),
374 "Packet RAM has to be on to store the packet.");
375
376 len = hdmi_infoframe_pack(frame, buffer, sizeof(buffer));
377 if (len < 0)
378 return;
379
380 ret = vc4_hdmi_stop_packet(encoder, frame->any.type);
381 if (ret) {
382 DRM_ERROR("Failed to wait for infoframe to go idle: %d\n", ret);
383 return;
384 }
385
386 for (i = 0; i < len; i += 7) {
387 HDMI_WRITE(packet_reg,
388 buffer[i + 0] << 0 |
389 buffer[i + 1] << 8 |
390 buffer[i + 2] << 16);
391 packet_reg += 4;
392
393 HDMI_WRITE(packet_reg,
394 buffer[i + 3] << 0 |
395 buffer[i + 4] << 8 |
396 buffer[i + 5] << 16 |
397 buffer[i + 6] << 24);
398 packet_reg += 4;
399 }
400
401 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
402 HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) | BIT(packet_id));
403 ret = wait_for((HDMI_READ(VC4_HDMI_RAM_PACKET_STATUS) &
404 BIT(packet_id)), 100);
405 if (ret)
406 DRM_ERROR("Failed to wait for infoframe to start: %d\n", ret);
407 }
408
409 static void vc4_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
410 {
411 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
412 struct drm_crtc *crtc = encoder->crtc;
413 const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
414 union hdmi_infoframe frame;
415 int ret;
416
417 ret = drm_hdmi_avi_infoframe_from_display_mode(&frame.avi, mode, false);
418 if (ret < 0) {
419 DRM_ERROR("couldn't fill AVI infoframe\n");
420 return;
421 }
422
423 drm_hdmi_avi_infoframe_quant_range(&frame.avi, mode,
424 vc4_encoder->limited_rgb_range ?
425 HDMI_QUANTIZATION_RANGE_LIMITED :
426 HDMI_QUANTIZATION_RANGE_FULL,
427 vc4_encoder->rgb_range_selectable);
428
429 vc4_hdmi_write_infoframe(encoder, &frame);
430 }
431
432 static void vc4_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
433 {
434 union hdmi_infoframe frame;
435 int ret;
436
437 ret = hdmi_spd_infoframe_init(&frame.spd, "Broadcom", "Videocore");
438 if (ret < 0) {
439 DRM_ERROR("couldn't fill SPD infoframe\n");
440 return;
441 }
442
443 frame.spd.sdi = HDMI_SPD_SDI_PC;
444
445 vc4_hdmi_write_infoframe(encoder, &frame);
446 }
447
448 static void vc4_hdmi_set_audio_infoframe(struct drm_encoder *encoder)
449 {
450 struct drm_device *drm = encoder->dev;
451 struct vc4_dev *vc4 = drm->dev_private;
452 struct vc4_hdmi *hdmi = vc4->hdmi;
453 union hdmi_infoframe frame;
454 int ret;
455
456 ret = hdmi_audio_infoframe_init(&frame.audio);
457
458 frame.audio.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
459 frame.audio.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
460 frame.audio.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
461 frame.audio.channels = hdmi->audio.channels;
462
463 vc4_hdmi_write_infoframe(encoder, &frame);
464 }
465
466 static void vc4_hdmi_set_infoframes(struct drm_encoder *encoder)
467 {
468 vc4_hdmi_set_avi_infoframe(encoder);
469 vc4_hdmi_set_spd_infoframe(encoder);
470 }
471
472 static void vc4_hdmi_encoder_disable(struct drm_encoder *encoder)
473 {
474 struct drm_device *dev = encoder->dev;
475 struct vc4_dev *vc4 = to_vc4_dev(dev);
476 struct vc4_hdmi *hdmi = vc4->hdmi;
477 int ret;
478
479 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG, 0);
480
481 HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0xf << 16);
482 HD_WRITE(VC4_HD_VID_CTL,
483 HD_READ(VC4_HD_VID_CTL) & ~VC4_HD_VID_CTL_ENABLE);
484
485 clk_disable_unprepare(hdmi->pixel_clock);
486
487 ret = pm_runtime_put(&hdmi->pdev->dev);
488 if (ret < 0)
489 DRM_ERROR("Failed to release power domain: %d\n", ret);
490 }
491
492 static void vc4_hdmi_encoder_enable(struct drm_encoder *encoder)
493 {
494 struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
495 struct vc4_hdmi_encoder *vc4_encoder = to_vc4_hdmi_encoder(encoder);
496 struct drm_device *dev = encoder->dev;
497 struct vc4_dev *vc4 = to_vc4_dev(dev);
498 struct vc4_hdmi *hdmi = vc4->hdmi;
499 bool debug_dump_regs = false;
500 bool hsync_pos = mode->flags & DRM_MODE_FLAG_PHSYNC;
501 bool vsync_pos = mode->flags & DRM_MODE_FLAG_PVSYNC;
502 bool interlaced = mode->flags & DRM_MODE_FLAG_INTERLACE;
503 u32 pixel_rep = (mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1;
504 u32 verta = (VC4_SET_FIELD(mode->crtc_vsync_end - mode->crtc_vsync_start,
505 VC4_HDMI_VERTA_VSP) |
506 VC4_SET_FIELD(mode->crtc_vsync_start - mode->crtc_vdisplay,
507 VC4_HDMI_VERTA_VFP) |
508 VC4_SET_FIELD(mode->crtc_vdisplay, VC4_HDMI_VERTA_VAL));
509 u32 vertb = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) |
510 VC4_SET_FIELD(mode->crtc_vtotal - mode->crtc_vsync_end,
511 VC4_HDMI_VERTB_VBP));
512 u32 vertb_even = (VC4_SET_FIELD(0, VC4_HDMI_VERTB_VSPO) |
513 VC4_SET_FIELD(mode->crtc_vtotal -
514 mode->crtc_vsync_end -
515 interlaced,
516 VC4_HDMI_VERTB_VBP));
517 u32 csc_ctl;
518 int ret;
519
520 ret = pm_runtime_get_sync(&hdmi->pdev->dev);
521 if (ret < 0) {
522 DRM_ERROR("Failed to retain power domain: %d\n", ret);
523 return;
524 }
525
526 ret = clk_set_rate(hdmi->pixel_clock,
527 mode->clock * 1000 *
528 ((mode->flags & DRM_MODE_FLAG_DBLCLK) ? 2 : 1));
529 if (ret) {
530 DRM_ERROR("Failed to set pixel clock rate: %d\n", ret);
531 return;
532 }
533
534 ret = clk_prepare_enable(hdmi->pixel_clock);
535 if (ret) {
536 DRM_ERROR("Failed to turn on pixel clock: %d\n", ret);
537 return;
538 }
539
540 HDMI_WRITE(VC4_HDMI_SW_RESET_CONTROL,
541 VC4_HDMI_SW_RESET_HDMI |
542 VC4_HDMI_SW_RESET_FORMAT_DETECT);
543
544 HDMI_WRITE(VC4_HDMI_SW_RESET_CONTROL, 0);
545
546 /* PHY should be in reset, like
547 * vc4_hdmi_encoder_disable() does.
548 */
549 HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0xf << 16);
550
551 HDMI_WRITE(VC4_HDMI_TX_PHY_RESET_CTL, 0);
552
553 if (debug_dump_regs) {
554 DRM_INFO("HDMI regs before:\n");
555 vc4_hdmi_dump_regs(dev);
556 }
557
558 HD_WRITE(VC4_HD_VID_CTL, 0);
559
560 HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
561 HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
562 VC4_HDMI_SCHEDULER_CONTROL_MANUAL_FORMAT |
563 VC4_HDMI_SCHEDULER_CONTROL_IGNORE_VSYNC_PREDICTS);
564
565 HDMI_WRITE(VC4_HDMI_HORZA,
566 (vsync_pos ? VC4_HDMI_HORZA_VPOS : 0) |
567 (hsync_pos ? VC4_HDMI_HORZA_HPOS : 0) |
568 VC4_SET_FIELD(mode->hdisplay * pixel_rep,
569 VC4_HDMI_HORZA_HAP));
570
571 HDMI_WRITE(VC4_HDMI_HORZB,
572 VC4_SET_FIELD((mode->htotal -
573 mode->hsync_end) * pixel_rep,
574 VC4_HDMI_HORZB_HBP) |
575 VC4_SET_FIELD((mode->hsync_end -
576 mode->hsync_start) * pixel_rep,
577 VC4_HDMI_HORZB_HSP) |
578 VC4_SET_FIELD((mode->hsync_start -
579 mode->hdisplay) * pixel_rep,
580 VC4_HDMI_HORZB_HFP));
581
582 HDMI_WRITE(VC4_HDMI_VERTA0, verta);
583 HDMI_WRITE(VC4_HDMI_VERTA1, verta);
584
585 HDMI_WRITE(VC4_HDMI_VERTB0, vertb_even);
586 HDMI_WRITE(VC4_HDMI_VERTB1, vertb);
587
588 HD_WRITE(VC4_HD_VID_CTL,
589 (vsync_pos ? 0 : VC4_HD_VID_CTL_VSYNC_LOW) |
590 (hsync_pos ? 0 : VC4_HD_VID_CTL_HSYNC_LOW));
591
592 csc_ctl = VC4_SET_FIELD(VC4_HD_CSC_CTL_ORDER_BGR,
593 VC4_HD_CSC_CTL_ORDER);
594
595 if (vc4_encoder->hdmi_monitor &&
596 drm_default_rgb_quant_range(mode) ==
597 HDMI_QUANTIZATION_RANGE_LIMITED) {
598 /* CEA VICs other than #1 requre limited range RGB
599 * output unless overridden by an AVI infoframe.
600 * Apply a colorspace conversion to squash 0-255 down
601 * to 16-235. The matrix here is:
602 *
603 * [ 0 0 0.8594 16]
604 * [ 0 0.8594 0 16]
605 * [ 0.8594 0 0 16]
606 * [ 0 0 0 1]
607 */
608 csc_ctl |= VC4_HD_CSC_CTL_ENABLE;
609 csc_ctl |= VC4_HD_CSC_CTL_RGB2YCC;
610 csc_ctl |= VC4_SET_FIELD(VC4_HD_CSC_CTL_MODE_CUSTOM,
611 VC4_HD_CSC_CTL_MODE);
612
613 HD_WRITE(VC4_HD_CSC_12_11, (0x000 << 16) | 0x000);
614 HD_WRITE(VC4_HD_CSC_14_13, (0x100 << 16) | 0x6e0);
615 HD_WRITE(VC4_HD_CSC_22_21, (0x6e0 << 16) | 0x000);
616 HD_WRITE(VC4_HD_CSC_24_23, (0x100 << 16) | 0x000);
617 HD_WRITE(VC4_HD_CSC_32_31, (0x000 << 16) | 0x6e0);
618 HD_WRITE(VC4_HD_CSC_34_33, (0x100 << 16) | 0x000);
619 vc4_encoder->limited_rgb_range = true;
620 } else {
621 vc4_encoder->limited_rgb_range = false;
622 }
623
624 /* The RGB order applies even when CSC is disabled. */
625 HD_WRITE(VC4_HD_CSC_CTL, csc_ctl);
626
627 HDMI_WRITE(VC4_HDMI_FIFO_CTL, VC4_HDMI_FIFO_CTL_MASTER_SLAVE_N);
628
629 if (debug_dump_regs) {
630 DRM_INFO("HDMI regs after:\n");
631 vc4_hdmi_dump_regs(dev);
632 }
633
634 HD_WRITE(VC4_HD_VID_CTL,
635 HD_READ(VC4_HD_VID_CTL) |
636 VC4_HD_VID_CTL_ENABLE |
637 VC4_HD_VID_CTL_UNDERFLOW_ENABLE |
638 VC4_HD_VID_CTL_FRAME_COUNTER_RESET);
639
640 if (vc4_encoder->hdmi_monitor) {
641 HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
642 HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
643 VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
644
645 ret = wait_for(HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
646 VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE, 1000);
647 WARN_ONCE(ret, "Timeout waiting for "
648 "VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
649 } else {
650 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
651 HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) &
652 ~(VC4_HDMI_RAM_PACKET_ENABLE));
653 HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
654 HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
655 ~VC4_HDMI_SCHEDULER_CONTROL_MODE_HDMI);
656
657 ret = wait_for(!(HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
658 VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE), 1000);
659 WARN_ONCE(ret, "Timeout waiting for "
660 "!VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE\n");
661 }
662
663 if (vc4_encoder->hdmi_monitor) {
664 u32 drift;
665
666 WARN_ON(!(HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) &
667 VC4_HDMI_SCHEDULER_CONTROL_HDMI_ACTIVE));
668 HDMI_WRITE(VC4_HDMI_SCHEDULER_CONTROL,
669 HDMI_READ(VC4_HDMI_SCHEDULER_CONTROL) |
670 VC4_HDMI_SCHEDULER_CONTROL_VERT_ALWAYS_KEEPOUT);
671
672 HDMI_WRITE(VC4_HDMI_RAM_PACKET_CONFIG,
673 VC4_HDMI_RAM_PACKET_ENABLE);
674
675 vc4_hdmi_set_infoframes(encoder);
676
677 drift = HDMI_READ(VC4_HDMI_FIFO_CTL);
678 drift &= VC4_HDMI_FIFO_VALID_WRITE_MASK;
679
680 HDMI_WRITE(VC4_HDMI_FIFO_CTL,
681 drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
682 HDMI_WRITE(VC4_HDMI_FIFO_CTL,
683 drift | VC4_HDMI_FIFO_CTL_RECENTER);
684 udelay(1000);
685 HDMI_WRITE(VC4_HDMI_FIFO_CTL,
686 drift & ~VC4_HDMI_FIFO_CTL_RECENTER);
687 HDMI_WRITE(VC4_HDMI_FIFO_CTL,
688 drift | VC4_HDMI_FIFO_CTL_RECENTER);
689
690 ret = wait_for(HDMI_READ(VC4_HDMI_FIFO_CTL) &
691 VC4_HDMI_FIFO_CTL_RECENTER_DONE, 1);
692 WARN_ONCE(ret, "Timeout waiting for "
693 "VC4_HDMI_FIFO_CTL_RECENTER_DONE");
694 }
695 }
696
697 static const struct drm_encoder_helper_funcs vc4_hdmi_encoder_helper_funcs = {
698 .disable = vc4_hdmi_encoder_disable,
699 .enable = vc4_hdmi_encoder_enable,
700 };
701
702 /* HDMI audio codec callbacks */
703 static void vc4_hdmi_audio_set_mai_clock(struct vc4_hdmi *hdmi)
704 {
705 struct drm_device *drm = hdmi->encoder->dev;
706 struct vc4_dev *vc4 = to_vc4_dev(drm);
707 u32 hsm_clock = clk_get_rate(hdmi->hsm_clock);
708 unsigned long n, m;
709
710 rational_best_approximation(hsm_clock, hdmi->audio.samplerate,
711 VC4_HD_MAI_SMP_N_MASK >>
712 VC4_HD_MAI_SMP_N_SHIFT,
713 (VC4_HD_MAI_SMP_M_MASK >>
714 VC4_HD_MAI_SMP_M_SHIFT) + 1,
715 &n, &m);
716
717 HD_WRITE(VC4_HD_MAI_SMP,
718 VC4_SET_FIELD(n, VC4_HD_MAI_SMP_N) |
719 VC4_SET_FIELD(m - 1, VC4_HD_MAI_SMP_M));
720 }
721
722 static void vc4_hdmi_set_n_cts(struct vc4_hdmi *hdmi)
723 {
724 struct drm_encoder *encoder = hdmi->encoder;
725 struct drm_crtc *crtc = encoder->crtc;
726 struct drm_device *drm = encoder->dev;
727 struct vc4_dev *vc4 = to_vc4_dev(drm);
728 const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
729 u32 samplerate = hdmi->audio.samplerate;
730 u32 n, cts;
731 u64 tmp;
732
733 n = 128 * samplerate / 1000;
734 tmp = (u64)(mode->clock * 1000) * n;
735 do_div(tmp, 128 * samplerate);
736 cts = tmp;
737
738 HDMI_WRITE(VC4_HDMI_CRP_CFG,
739 VC4_HDMI_CRP_CFG_EXTERNAL_CTS_EN |
740 VC4_SET_FIELD(n, VC4_HDMI_CRP_CFG_N));
741
742 /*
743 * We could get slightly more accurate clocks in some cases by
744 * providing a CTS_1 value. The two CTS values are alternated
745 * between based on the period fields
746 */
747 HDMI_WRITE(VC4_HDMI_CTS_0, cts);
748 HDMI_WRITE(VC4_HDMI_CTS_1, cts);
749 }
750
751 static inline struct vc4_hdmi *dai_to_hdmi(struct snd_soc_dai *dai)
752 {
753 struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
754
755 return snd_soc_card_get_drvdata(card);
756 }
757
758 static int vc4_hdmi_audio_startup(struct snd_pcm_substream *substream,
759 struct snd_soc_dai *dai)
760 {
761 struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
762 struct drm_encoder *encoder = hdmi->encoder;
763 struct vc4_dev *vc4 = to_vc4_dev(encoder->dev);
764 int ret;
765
766 if (hdmi->audio.substream && hdmi->audio.substream != substream)
767 return -EINVAL;
768
769 hdmi->audio.substream = substream;
770
771 /*
772 * If the HDMI encoder hasn't probed, or the encoder is
773 * currently in DVI mode, treat the codec dai as missing.
774 */
775 if (!encoder->crtc || !(HDMI_READ(VC4_HDMI_RAM_PACKET_CONFIG) &
776 VC4_HDMI_RAM_PACKET_ENABLE))
777 return -ENODEV;
778
779 ret = snd_pcm_hw_constraint_eld(substream->runtime,
780 hdmi->connector->eld);
781 if (ret)
782 return ret;
783
784 return 0;
785 }
786
787 static int vc4_hdmi_audio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
788 {
789 return 0;
790 }
791
792 static void vc4_hdmi_audio_reset(struct vc4_hdmi *hdmi)
793 {
794 struct drm_encoder *encoder = hdmi->encoder;
795 struct drm_device *drm = encoder->dev;
796 struct device *dev = &hdmi->pdev->dev;
797 struct vc4_dev *vc4 = to_vc4_dev(drm);
798 int ret;
799
800 ret = vc4_hdmi_stop_packet(encoder, HDMI_INFOFRAME_TYPE_AUDIO);
801 if (ret)
802 dev_err(dev, "Failed to stop audio infoframe: %d\n", ret);
803
804 HD_WRITE(VC4_HD_MAI_CTL, VC4_HD_MAI_CTL_RESET);
805 HD_WRITE(VC4_HD_MAI_CTL, VC4_HD_MAI_CTL_ERRORF);
806 HD_WRITE(VC4_HD_MAI_CTL, VC4_HD_MAI_CTL_FLUSH);
807 }
808
809 static void vc4_hdmi_audio_shutdown(struct snd_pcm_substream *substream,
810 struct snd_soc_dai *dai)
811 {
812 struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
813
814 if (substream != hdmi->audio.substream)
815 return;
816
817 vc4_hdmi_audio_reset(hdmi);
818
819 hdmi->audio.substream = NULL;
820 }
821
822 /* HDMI audio codec callbacks */
823 static int vc4_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
824 struct snd_pcm_hw_params *params,
825 struct snd_soc_dai *dai)
826 {
827 struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
828 struct drm_encoder *encoder = hdmi->encoder;
829 struct drm_device *drm = encoder->dev;
830 struct device *dev = &hdmi->pdev->dev;
831 struct vc4_dev *vc4 = to_vc4_dev(drm);
832 u32 audio_packet_config, channel_mask;
833 u32 channel_map, i;
834
835 if (substream != hdmi->audio.substream)
836 return -EINVAL;
837
838 dev_dbg(dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
839 params_rate(params), params_width(params),
840 params_channels(params));
841
842 hdmi->audio.channels = params_channels(params);
843 hdmi->audio.samplerate = params_rate(params);
844
845 HD_WRITE(VC4_HD_MAI_CTL,
846 VC4_HD_MAI_CTL_RESET |
847 VC4_HD_MAI_CTL_FLUSH |
848 VC4_HD_MAI_CTL_DLATE |
849 VC4_HD_MAI_CTL_ERRORE |
850 VC4_HD_MAI_CTL_ERRORF);
851
852 vc4_hdmi_audio_set_mai_clock(hdmi);
853
854 audio_packet_config =
855 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_SAMPLE_FLAT |
856 VC4_HDMI_AUDIO_PACKET_ZERO_DATA_ON_INACTIVE_CHANNELS |
857 VC4_SET_FIELD(0xf, VC4_HDMI_AUDIO_PACKET_B_FRAME_IDENTIFIER);
858
859 channel_mask = GENMASK(hdmi->audio.channels - 1, 0);
860 audio_packet_config |= VC4_SET_FIELD(channel_mask,
861 VC4_HDMI_AUDIO_PACKET_CEA_MASK);
862
863 /* Set the MAI threshold. This logic mimics the firmware's. */
864 if (hdmi->audio.samplerate > 96000) {
865 HD_WRITE(VC4_HD_MAI_THR,
866 VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQHIGH) |
867 VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQLOW));
868 } else if (hdmi->audio.samplerate > 48000) {
869 HD_WRITE(VC4_HD_MAI_THR,
870 VC4_SET_FIELD(0x14, VC4_HD_MAI_THR_DREQHIGH) |
871 VC4_SET_FIELD(0x12, VC4_HD_MAI_THR_DREQLOW));
872 } else {
873 HD_WRITE(VC4_HD_MAI_THR,
874 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICHIGH) |
875 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_PANICLOW) |
876 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQHIGH) |
877 VC4_SET_FIELD(0x10, VC4_HD_MAI_THR_DREQLOW));
878 }
879
880 HDMI_WRITE(VC4_HDMI_MAI_CONFIG,
881 VC4_HDMI_MAI_CONFIG_BIT_REVERSE |
882 VC4_SET_FIELD(channel_mask, VC4_HDMI_MAI_CHANNEL_MASK));
883
884 channel_map = 0;
885 for (i = 0; i < 8; i++) {
886 if (channel_mask & BIT(i))
887 channel_map |= i << (3 * i);
888 }
889
890 HDMI_WRITE(VC4_HDMI_MAI_CHANNEL_MAP, channel_map);
891 HDMI_WRITE(VC4_HDMI_AUDIO_PACKET_CONFIG, audio_packet_config);
892 vc4_hdmi_set_n_cts(hdmi);
893
894 return 0;
895 }
896
897 static int vc4_hdmi_audio_trigger(struct snd_pcm_substream *substream, int cmd,
898 struct snd_soc_dai *dai)
899 {
900 struct vc4_hdmi *hdmi = dai_to_hdmi(dai);
901 struct drm_encoder *encoder = hdmi->encoder;
902 struct drm_device *drm = encoder->dev;
903 struct vc4_dev *vc4 = to_vc4_dev(drm);
904
905 switch (cmd) {
906 case SNDRV_PCM_TRIGGER_START:
907 vc4_hdmi_set_audio_infoframe(encoder);
908 HDMI_WRITE(VC4_HDMI_TX_PHY_CTL0,
909 HDMI_READ(VC4_HDMI_TX_PHY_CTL0) &
910 ~VC4_HDMI_TX_PHY_RNG_PWRDN);
911 HD_WRITE(VC4_HD_MAI_CTL,
912 VC4_SET_FIELD(hdmi->audio.channels,
913 VC4_HD_MAI_CTL_CHNUM) |
914 VC4_HD_MAI_CTL_ENABLE);
915 break;
916 case SNDRV_PCM_TRIGGER_STOP:
917 HD_WRITE(VC4_HD_MAI_CTL,
918 VC4_HD_MAI_CTL_DLATE |
919 VC4_HD_MAI_CTL_ERRORE |
920 VC4_HD_MAI_CTL_ERRORF);
921 HDMI_WRITE(VC4_HDMI_TX_PHY_CTL0,
922 HDMI_READ(VC4_HDMI_TX_PHY_CTL0) |
923 VC4_HDMI_TX_PHY_RNG_PWRDN);
924 break;
925 default:
926 break;
927 }
928
929 return 0;
930 }
931
932 static inline struct vc4_hdmi *
933 snd_component_to_hdmi(struct snd_soc_component *component)
934 {
935 struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
936
937 return snd_soc_card_get_drvdata(card);
938 }
939
940 static int vc4_hdmi_audio_eld_ctl_info(struct snd_kcontrol *kcontrol,
941 struct snd_ctl_elem_info *uinfo)
942 {
943 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
944 struct vc4_hdmi *hdmi = snd_component_to_hdmi(component);
945
946 uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
947 uinfo->count = sizeof(hdmi->connector->eld);
948
949 return 0;
950 }
951
952 static int vc4_hdmi_audio_eld_ctl_get(struct snd_kcontrol *kcontrol,
953 struct snd_ctl_elem_value *ucontrol)
954 {
955 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
956 struct vc4_hdmi *hdmi = snd_component_to_hdmi(component);
957
958 memcpy(ucontrol->value.bytes.data, hdmi->connector->eld,
959 sizeof(hdmi->connector->eld));
960
961 return 0;
962 }
963
964 static const struct snd_kcontrol_new vc4_hdmi_audio_controls[] = {
965 {
966 .access = SNDRV_CTL_ELEM_ACCESS_READ |
967 SNDRV_CTL_ELEM_ACCESS_VOLATILE,
968 .iface = SNDRV_CTL_ELEM_IFACE_PCM,
969 .name = "ELD",
970 .info = vc4_hdmi_audio_eld_ctl_info,
971 .get = vc4_hdmi_audio_eld_ctl_get,
972 },
973 };
974
975 static const struct snd_soc_dapm_widget vc4_hdmi_audio_widgets[] = {
976 SND_SOC_DAPM_OUTPUT("TX"),
977 };
978
979 static const struct snd_soc_dapm_route vc4_hdmi_audio_routes[] = {
980 { "TX", NULL, "Playback" },
981 };
982
983 static const struct snd_soc_codec_driver vc4_hdmi_audio_codec_drv = {
984 .component_driver = {
985 .controls = vc4_hdmi_audio_controls,
986 .num_controls = ARRAY_SIZE(vc4_hdmi_audio_controls),
987 .dapm_widgets = vc4_hdmi_audio_widgets,
988 .num_dapm_widgets = ARRAY_SIZE(vc4_hdmi_audio_widgets),
989 .dapm_routes = vc4_hdmi_audio_routes,
990 .num_dapm_routes = ARRAY_SIZE(vc4_hdmi_audio_routes),
991 },
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 codec and codec dai */
1090 ret = snd_soc_register_codec(dev, &vc4_hdmi_audio_codec_drv,
1091 &vc4_hdmi_audio_codec_dai_drv, 1);
1092 if (ret) {
1093 dev_err(dev, "Could not register codec: %d\n", ret);
1094 return ret;
1095 }
1096
1097 dai_link->name = "MAI";
1098 dai_link->stream_name = "MAI PCM";
1099 dai_link->codec_dai_name = vc4_hdmi_audio_codec_dai_drv.name;
1100 dai_link->cpu_dai_name = dev_name(dev);
1101 dai_link->codec_name = dev_name(dev);
1102 dai_link->platform_name = dev_name(dev);
1103
1104 card->dai_link = dai_link;
1105 card->num_links = 1;
1106 card->name = "vc4-hdmi";
1107 card->dev = dev;
1108
1109 /*
1110 * Be careful, snd_soc_register_card() calls dev_set_drvdata() and
1111 * stores a pointer to the snd card object in dev->driver_data. This
1112 * means we cannot use it for something else. The hdmi back-pointer is
1113 * now stored in card->drvdata and should be retrieved with
1114 * snd_soc_card_get_drvdata() if needed.
1115 */
1116 snd_soc_card_set_drvdata(card, hdmi);
1117 ret = devm_snd_soc_register_card(dev, card);
1118 if (ret) {
1119 dev_err(dev, "Could not register sound card: %d\n", ret);
1120 goto unregister_codec;
1121 }
1122
1123 return 0;
1124
1125 unregister_codec:
1126 snd_soc_unregister_codec(dev);
1127
1128 return ret;
1129 }
1130
1131 static void vc4_hdmi_audio_cleanup(struct vc4_hdmi *hdmi)
1132 {
1133 struct device *dev = &hdmi->pdev->dev;
1134
1135 /*
1136 * If drvdata is not set this means the audio card was not
1137 * registered, just skip codec unregistration in this case.
1138 */
1139 if (dev_get_drvdata(dev))
1140 snd_soc_unregister_codec(dev);
1141 }
1142
1143 #ifdef CONFIG_DRM_VC4_HDMI_CEC
1144 static irqreturn_t vc4_cec_irq_handler_thread(int irq, void *priv)
1145 {
1146 struct vc4_dev *vc4 = priv;
1147 struct vc4_hdmi *hdmi = vc4->hdmi;
1148
1149 if (hdmi->cec_irq_was_rx) {
1150 if (hdmi->cec_rx_msg.len)
1151 cec_received_msg(hdmi->cec_adap, &hdmi->cec_rx_msg);
1152 } else if (hdmi->cec_tx_ok) {
1153 cec_transmit_done(hdmi->cec_adap, CEC_TX_STATUS_OK,
1154 0, 0, 0, 0);
1155 } else {
1156 /*
1157 * This CEC implementation makes 1 retry, so if we
1158 * get a NACK, then that means it made 2 attempts.
1159 */
1160 cec_transmit_done(hdmi->cec_adap, CEC_TX_STATUS_NACK,
1161 0, 2, 0, 0);
1162 }
1163 return IRQ_HANDLED;
1164 }
1165
1166 static void vc4_cec_read_msg(struct vc4_dev *vc4, u32 cntrl1)
1167 {
1168 struct cec_msg *msg = &vc4->hdmi->cec_rx_msg;
1169 unsigned int i;
1170
1171 msg->len = 1 + ((cntrl1 & VC4_HDMI_CEC_REC_WRD_CNT_MASK) >>
1172 VC4_HDMI_CEC_REC_WRD_CNT_SHIFT);
1173 for (i = 0; i < msg->len; i += 4) {
1174 u32 val = HDMI_READ(VC4_HDMI_CEC_RX_DATA_1 + i);
1175
1176 msg->msg[i] = val & 0xff;
1177 msg->msg[i + 1] = (val >> 8) & 0xff;
1178 msg->msg[i + 2] = (val >> 16) & 0xff;
1179 msg->msg[i + 3] = (val >> 24) & 0xff;
1180 }
1181 }
1182
1183 static irqreturn_t vc4_cec_irq_handler(int irq, void *priv)
1184 {
1185 struct vc4_dev *vc4 = priv;
1186 struct vc4_hdmi *hdmi = vc4->hdmi;
1187 u32 stat = HDMI_READ(VC4_HDMI_CPU_STATUS);
1188 u32 cntrl1, cntrl5;
1189
1190 if (!(stat & VC4_HDMI_CPU_CEC))
1191 return IRQ_NONE;
1192 hdmi->cec_rx_msg.len = 0;
1193 cntrl1 = HDMI_READ(VC4_HDMI_CEC_CNTRL_1);
1194 cntrl5 = HDMI_READ(VC4_HDMI_CEC_CNTRL_5);
1195 hdmi->cec_irq_was_rx = cntrl5 & VC4_HDMI_CEC_RX_CEC_INT;
1196 if (hdmi->cec_irq_was_rx) {
1197 vc4_cec_read_msg(vc4, cntrl1);
1198 cntrl1 |= VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
1199 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, cntrl1);
1200 cntrl1 &= ~VC4_HDMI_CEC_CLEAR_RECEIVE_OFF;
1201 } else {
1202 hdmi->cec_tx_ok = cntrl1 & VC4_HDMI_CEC_TX_STATUS_GOOD;
1203 cntrl1 &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
1204 }
1205 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, cntrl1);
1206 HDMI_WRITE(VC4_HDMI_CPU_CLEAR, VC4_HDMI_CPU_CEC);
1207
1208 return IRQ_WAKE_THREAD;
1209 }
1210
1211 static int vc4_hdmi_cec_adap_enable(struct cec_adapter *adap, bool enable)
1212 {
1213 struct vc4_dev *vc4 = cec_get_drvdata(adap);
1214 /* clock period in microseconds */
1215 const u32 usecs = 1000000 / CEC_CLOCK_FREQ;
1216 u32 val = HDMI_READ(VC4_HDMI_CEC_CNTRL_5);
1217
1218 val &= ~(VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET |
1219 VC4_HDMI_CEC_CNT_TO_4700_US_MASK |
1220 VC4_HDMI_CEC_CNT_TO_4500_US_MASK);
1221 val |= ((4700 / usecs) << VC4_HDMI_CEC_CNT_TO_4700_US_SHIFT) |
1222 ((4500 / usecs) << VC4_HDMI_CEC_CNT_TO_4500_US_SHIFT);
1223
1224 if (enable) {
1225 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_5, val |
1226 VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
1227 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_5, val);
1228 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_2,
1229 ((1500 / usecs) << VC4_HDMI_CEC_CNT_TO_1500_US_SHIFT) |
1230 ((1300 / usecs) << VC4_HDMI_CEC_CNT_TO_1300_US_SHIFT) |
1231 ((800 / usecs) << VC4_HDMI_CEC_CNT_TO_800_US_SHIFT) |
1232 ((600 / usecs) << VC4_HDMI_CEC_CNT_TO_600_US_SHIFT) |
1233 ((400 / usecs) << VC4_HDMI_CEC_CNT_TO_400_US_SHIFT));
1234 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_3,
1235 ((2750 / usecs) << VC4_HDMI_CEC_CNT_TO_2750_US_SHIFT) |
1236 ((2400 / usecs) << VC4_HDMI_CEC_CNT_TO_2400_US_SHIFT) |
1237 ((2050 / usecs) << VC4_HDMI_CEC_CNT_TO_2050_US_SHIFT) |
1238 ((1700 / usecs) << VC4_HDMI_CEC_CNT_TO_1700_US_SHIFT));
1239 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_4,
1240 ((4300 / usecs) << VC4_HDMI_CEC_CNT_TO_4300_US_SHIFT) |
1241 ((3900 / usecs) << VC4_HDMI_CEC_CNT_TO_3900_US_SHIFT) |
1242 ((3600 / usecs) << VC4_HDMI_CEC_CNT_TO_3600_US_SHIFT) |
1243 ((3500 / usecs) << VC4_HDMI_CEC_CNT_TO_3500_US_SHIFT));
1244
1245 HDMI_WRITE(VC4_HDMI_CPU_MASK_CLEAR, VC4_HDMI_CPU_CEC);
1246 } else {
1247 HDMI_WRITE(VC4_HDMI_CPU_MASK_SET, VC4_HDMI_CPU_CEC);
1248 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_5, val |
1249 VC4_HDMI_CEC_TX_SW_RESET | VC4_HDMI_CEC_RX_SW_RESET);
1250 }
1251 return 0;
1252 }
1253
1254 static int vc4_hdmi_cec_adap_log_addr(struct cec_adapter *adap, u8 log_addr)
1255 {
1256 struct vc4_dev *vc4 = cec_get_drvdata(adap);
1257
1258 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1,
1259 (HDMI_READ(VC4_HDMI_CEC_CNTRL_1) & ~VC4_HDMI_CEC_ADDR_MASK) |
1260 (log_addr & 0xf) << VC4_HDMI_CEC_ADDR_SHIFT);
1261 return 0;
1262 }
1263
1264 static int vc4_hdmi_cec_adap_transmit(struct cec_adapter *adap, u8 attempts,
1265 u32 signal_free_time, struct cec_msg *msg)
1266 {
1267 struct vc4_dev *vc4 = cec_get_drvdata(adap);
1268 u32 val;
1269 unsigned int i;
1270
1271 for (i = 0; i < msg->len; i += 4)
1272 HDMI_WRITE(VC4_HDMI_CEC_TX_DATA_1 + i,
1273 (msg->msg[i]) |
1274 (msg->msg[i + 1] << 8) |
1275 (msg->msg[i + 2] << 16) |
1276 (msg->msg[i + 3] << 24));
1277
1278 val = HDMI_READ(VC4_HDMI_CEC_CNTRL_1);
1279 val &= ~VC4_HDMI_CEC_START_XMIT_BEGIN;
1280 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, val);
1281 val &= ~VC4_HDMI_CEC_MESSAGE_LENGTH_MASK;
1282 val |= (msg->len - 1) << VC4_HDMI_CEC_MESSAGE_LENGTH_SHIFT;
1283 val |= VC4_HDMI_CEC_START_XMIT_BEGIN;
1284
1285 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, val);
1286 return 0;
1287 }
1288
1289 static const struct cec_adap_ops vc4_hdmi_cec_adap_ops = {
1290 .adap_enable = vc4_hdmi_cec_adap_enable,
1291 .adap_log_addr = vc4_hdmi_cec_adap_log_addr,
1292 .adap_transmit = vc4_hdmi_cec_adap_transmit,
1293 };
1294 #endif
1295
1296 static int vc4_hdmi_bind(struct device *dev, struct device *master, void *data)
1297 {
1298 struct platform_device *pdev = to_platform_device(dev);
1299 struct drm_device *drm = dev_get_drvdata(master);
1300 struct vc4_dev *vc4 = drm->dev_private;
1301 struct vc4_hdmi *hdmi;
1302 struct vc4_hdmi_encoder *vc4_hdmi_encoder;
1303 struct device_node *ddc_node;
1304 u32 value;
1305 int ret;
1306
1307 hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);
1308 if (!hdmi)
1309 return -ENOMEM;
1310
1311 vc4_hdmi_encoder = devm_kzalloc(dev, sizeof(*vc4_hdmi_encoder),
1312 GFP_KERNEL);
1313 if (!vc4_hdmi_encoder)
1314 return -ENOMEM;
1315 vc4_hdmi_encoder->base.type = VC4_ENCODER_TYPE_HDMI;
1316 hdmi->encoder = &vc4_hdmi_encoder->base.base;
1317
1318 hdmi->pdev = pdev;
1319 hdmi->hdmicore_regs = vc4_ioremap_regs(pdev, 0);
1320 if (IS_ERR(hdmi->hdmicore_regs))
1321 return PTR_ERR(hdmi->hdmicore_regs);
1322
1323 hdmi->hd_regs = vc4_ioremap_regs(pdev, 1);
1324 if (IS_ERR(hdmi->hd_regs))
1325 return PTR_ERR(hdmi->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 = vc4_hdmi_connector_init(drm, hdmi->encoder);
1402 if (IS_ERR(hdmi->connector)) {
1403 ret = PTR_ERR(hdmi->connector);
1404 goto err_destroy_encoder;
1405 }
1406 #ifdef CONFIG_DRM_VC4_HDMI_CEC
1407 hdmi->cec_adap = cec_allocate_adapter(&vc4_hdmi_cec_adap_ops,
1408 vc4, "vc4",
1409 CEC_CAP_TRANSMIT |
1410 CEC_CAP_LOG_ADDRS |
1411 CEC_CAP_PASSTHROUGH |
1412 CEC_CAP_RC, 1);
1413 ret = PTR_ERR_OR_ZERO(hdmi->cec_adap);
1414 if (ret < 0)
1415 goto err_destroy_conn;
1416 HDMI_WRITE(VC4_HDMI_CPU_MASK_SET, 0xffffffff);
1417 value = HDMI_READ(VC4_HDMI_CEC_CNTRL_1);
1418 value &= ~VC4_HDMI_CEC_DIV_CLK_CNT_MASK;
1419 /*
1420 * Set the logical address to Unregistered and set the clock
1421 * divider: the hsm_clock rate and this divider setting will
1422 * give a 40 kHz CEC clock.
1423 */
1424 value |= VC4_HDMI_CEC_ADDR_MASK |
1425 (4091 << VC4_HDMI_CEC_DIV_CLK_CNT_SHIFT);
1426 HDMI_WRITE(VC4_HDMI_CEC_CNTRL_1, value);
1427 ret = devm_request_threaded_irq(dev, platform_get_irq(pdev, 0),
1428 vc4_cec_irq_handler,
1429 vc4_cec_irq_handler_thread, 0,
1430 "vc4 hdmi cec", vc4);
1431 if (ret)
1432 goto err_delete_cec_adap;
1433 ret = cec_register_adapter(hdmi->cec_adap, dev);
1434 if (ret < 0)
1435 goto err_delete_cec_adap;
1436 #endif
1437
1438 ret = vc4_hdmi_audio_init(hdmi);
1439 if (ret)
1440 goto err_destroy_encoder;
1441
1442 return 0;
1443
1444 #ifdef CONFIG_DRM_VC4_HDMI_CEC
1445 err_delete_cec_adap:
1446 cec_delete_adapter(hdmi->cec_adap);
1447 err_destroy_conn:
1448 vc4_hdmi_connector_destroy(hdmi->connector);
1449 #endif
1450 err_destroy_encoder:
1451 vc4_hdmi_encoder_destroy(hdmi->encoder);
1452 err_unprepare_hsm:
1453 clk_disable_unprepare(hdmi->hsm_clock);
1454 pm_runtime_disable(dev);
1455 err_put_i2c:
1456 put_device(&hdmi->ddc->dev);
1457
1458 return ret;
1459 }
1460
1461 static void vc4_hdmi_unbind(struct device *dev, struct device *master,
1462 void *data)
1463 {
1464 struct drm_device *drm = dev_get_drvdata(master);
1465 struct vc4_dev *vc4 = drm->dev_private;
1466 struct vc4_hdmi *hdmi = vc4->hdmi;
1467
1468 vc4_hdmi_audio_cleanup(hdmi);
1469 cec_unregister_adapter(hdmi->cec_adap);
1470 vc4_hdmi_connector_destroy(hdmi->connector);
1471 vc4_hdmi_encoder_destroy(hdmi->encoder);
1472
1473 clk_disable_unprepare(hdmi->hsm_clock);
1474 pm_runtime_disable(dev);
1475
1476 put_device(&hdmi->ddc->dev);
1477
1478 vc4->hdmi = NULL;
1479 }
1480
1481 static const struct component_ops vc4_hdmi_ops = {
1482 .bind = vc4_hdmi_bind,
1483 .unbind = vc4_hdmi_unbind,
1484 };
1485
1486 static int vc4_hdmi_dev_probe(struct platform_device *pdev)
1487 {
1488 return component_add(&pdev->dev, &vc4_hdmi_ops);
1489 }
1490
1491 static int vc4_hdmi_dev_remove(struct platform_device *pdev)
1492 {
1493 component_del(&pdev->dev, &vc4_hdmi_ops);
1494 return 0;
1495 }
1496
1497 static const struct of_device_id vc4_hdmi_dt_match[] = {
1498 { .compatible = "brcm,bcm2835-hdmi" },
1499 {}
1500 };
1501
1502 struct platform_driver vc4_hdmi_driver = {
1503 .probe = vc4_hdmi_dev_probe,
1504 .remove = vc4_hdmi_dev_remove,
1505 .driver = {
1506 .name = "vc4_hdmi",
1507 .of_match_table = vc4_hdmi_dt_match,
1508 },
1509 };
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