1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2016 BayLibre, SAS
4 * Author: Neil Armstrong <narmstrong@baylibre.com>
5 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
6 */
7
8 #include <linux/clk.h>
9 #include <linux/component.h>
10 #include <linux/kernel.h>
11 #include <linux/module.h>
12 #include <linux/of.h>
13 #include <linux/of_graph.h>
14 #include <linux/of_platform.h>
15 #include <linux/platform_device.h>
16 #include <linux/regulator/consumer.h>
17 #include <linux/reset.h>
18
19 #include <media/cec-notifier.h>
20
21 #include <drm/drm_atomic_helper.h>
22 #include <drm/drm_bridge.h>
23 #include <drm/drm_bridge_connector.h>
24 #include <drm/drm_device.h>
25 #include <drm/drm_edid.h>
26 #include <drm/drm_probe_helper.h>
27 #include <drm/drm_simple_kms_helper.h>
28
29 #include <linux/media-bus-format.h>
30 #include <linux/videodev2.h>
31
32 #include "meson_drv.h"
33 #include "meson_registers.h"
34 #include "meson_vclk.h"
35 #include "meson_venc.h"
36 #include "meson_encoder_hdmi.h"
37
38 struct meson_encoder_hdmi {
39 struct drm_encoder encoder;
40 struct drm_bridge bridge;
41 struct drm_bridge *next_bridge;
42 struct drm_connector *connector;
43 struct meson_drm *priv;
44 unsigned long output_bus_fmt;
45 struct cec_notifier *cec_notifier;
46 };
47
48 #define bridge_to_meson_encoder_hdmi(x) \
49 container_of(x, struct meson_encoder_hdmi, bridge)
50
meson_encoder_hdmi_attach(struct drm_bridge * bridge,enum drm_bridge_attach_flags flags)51 static int meson_encoder_hdmi_attach(struct drm_bridge *bridge,
52 enum drm_bridge_attach_flags flags)
53 {
54 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
55
56 return drm_bridge_attach(bridge->encoder, encoder_hdmi->next_bridge,
57 &encoder_hdmi->bridge, flags);
58 }
59
meson_encoder_hdmi_detach(struct drm_bridge * bridge)60 static void meson_encoder_hdmi_detach(struct drm_bridge *bridge)
61 {
62 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
63
64 cec_notifier_conn_unregister(encoder_hdmi->cec_notifier);
65 encoder_hdmi->cec_notifier = NULL;
66 }
67
meson_encoder_hdmi_set_vclk(struct meson_encoder_hdmi * encoder_hdmi,const struct drm_display_mode * mode)68 static void meson_encoder_hdmi_set_vclk(struct meson_encoder_hdmi *encoder_hdmi,
69 const struct drm_display_mode *mode)
70 {
71 struct meson_drm *priv = encoder_hdmi->priv;
72 int vic = drm_match_cea_mode(mode);
73 unsigned long long phy_freq;
74 unsigned long long vclk_freq;
75 unsigned long long venc_freq;
76 unsigned long long hdmi_freq;
77
78 vclk_freq = mode->clock * 1000ULL;
79
80 /* For 420, pixel clock is half unlike venc clock */
81 if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24)
82 vclk_freq /= 2;
83
84 /* TMDS clock is pixel_clock * 10 */
85 phy_freq = vclk_freq * 10;
86
87 if (!vic) {
88 meson_vclk_setup(priv, MESON_VCLK_TARGET_DMT, phy_freq,
89 vclk_freq, vclk_freq, vclk_freq, false);
90 return;
91 }
92
93 /* 480i/576i needs global pixel doubling */
94 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
95 vclk_freq *= 2;
96
97 venc_freq = vclk_freq;
98 hdmi_freq = vclk_freq;
99
100 /* VENC double pixels for 1080i, 720p and YUV420 modes */
101 if (meson_venc_hdmi_venc_repeat(vic) ||
102 encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24)
103 venc_freq *= 2;
104
105 vclk_freq = max(venc_freq, hdmi_freq);
106
107 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
108 venc_freq /= 2;
109
110 dev_dbg(priv->dev,
111 "vclk:%lluHz phy=%lluHz venc=%lluHz hdmi=%lluHz enci=%d\n",
112 phy_freq, vclk_freq, venc_freq, hdmi_freq,
113 priv->venc.hdmi_use_enci);
114
115 meson_vclk_setup(priv, MESON_VCLK_TARGET_HDMI, phy_freq, vclk_freq,
116 venc_freq, hdmi_freq, priv->venc.hdmi_use_enci);
117 }
118
meson_encoder_hdmi_mode_valid(struct drm_bridge * bridge,const struct drm_display_info * display_info,const struct drm_display_mode * mode)119 static enum drm_mode_status meson_encoder_hdmi_mode_valid(struct drm_bridge *bridge,
120 const struct drm_display_info *display_info,
121 const struct drm_display_mode *mode)
122 {
123 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
124 struct meson_drm *priv = encoder_hdmi->priv;
125 bool is_hdmi2_sink = display_info->hdmi.scdc.supported;
126 unsigned long long clock = mode->clock * 1000ULL;
127 unsigned long long phy_freq;
128 unsigned long long vclk_freq;
129 unsigned long long venc_freq;
130 unsigned long long hdmi_freq;
131 int vic = drm_match_cea_mode(mode);
132 enum drm_mode_status status;
133
134 dev_dbg(priv->dev, "Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
135
136 /* If sink does not support 540MHz, reject the non-420 HDMI2 modes */
137 if (display_info->max_tmds_clock &&
138 mode->clock > display_info->max_tmds_clock &&
139 !drm_mode_is_420_only(display_info, mode) &&
140 !drm_mode_is_420_also(display_info, mode))
141 return MODE_BAD;
142
143 /* Check against non-VIC supported modes */
144 if (!vic) {
145 status = meson_venc_hdmi_supported_mode(mode);
146 if (status != MODE_OK)
147 return status;
148
149 return meson_vclk_dmt_supported_freq(priv, clock);
150 /* Check against supported VIC modes */
151 } else if (!meson_venc_hdmi_supported_vic(vic))
152 return MODE_BAD;
153
154 vclk_freq = clock;
155
156 /* For 420, pixel clock is half unlike venc clock */
157 if (drm_mode_is_420_only(display_info, mode) ||
158 (!is_hdmi2_sink &&
159 drm_mode_is_420_also(display_info, mode)))
160 vclk_freq /= 2;
161
162 /* TMDS clock is pixel_clock * 10 */
163 phy_freq = vclk_freq * 10;
164
165 /* 480i/576i needs global pixel doubling */
166 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
167 vclk_freq *= 2;
168
169 venc_freq = vclk_freq;
170 hdmi_freq = vclk_freq;
171
172 /* VENC double pixels for 1080i, 720p and YUV420 modes */
173 if (meson_venc_hdmi_venc_repeat(vic) ||
174 drm_mode_is_420_only(display_info, mode) ||
175 (!is_hdmi2_sink &&
176 drm_mode_is_420_also(display_info, mode)))
177 venc_freq *= 2;
178
179 vclk_freq = max(venc_freq, hdmi_freq);
180
181 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
182 venc_freq /= 2;
183
184 dev_dbg(priv->dev,
185 "%s: vclk:%lluHz phy=%lluHz venc=%lluHz hdmi=%lluHz\n",
186 __func__, phy_freq, vclk_freq, venc_freq, hdmi_freq);
187
188 return meson_vclk_vic_supported_freq(priv, phy_freq, vclk_freq);
189 }
190
meson_encoder_hdmi_atomic_enable(struct drm_bridge * bridge,struct drm_atomic_state * state)191 static void meson_encoder_hdmi_atomic_enable(struct drm_bridge *bridge,
192 struct drm_atomic_state *state)
193 {
194 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
195 unsigned int ycrcb_map = VPU_HDMI_OUTPUT_CBYCR;
196 struct meson_drm *priv = encoder_hdmi->priv;
197 struct drm_connector_state *conn_state;
198 const struct drm_display_mode *mode;
199 struct drm_crtc_state *crtc_state;
200 struct drm_connector *connector;
201 bool yuv420_mode = false;
202 int vic;
203
204 connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
205 if (WARN_ON(!connector))
206 return;
207
208 conn_state = drm_atomic_get_new_connector_state(state, connector);
209 if (WARN_ON(!conn_state))
210 return;
211
212 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
213 if (WARN_ON(!crtc_state))
214 return;
215
216 mode = &crtc_state->adjusted_mode;
217
218 vic = drm_match_cea_mode(mode);
219
220 dev_dbg(priv->dev, "\"%s\" vic %d\n", mode->name, vic);
221
222 if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) {
223 ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
224 yuv420_mode = true;
225 } else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
226 ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
227
228 /* VENC + VENC-DVI Mode setup */
229 meson_venc_hdmi_mode_set(priv, vic, ycrcb_map, yuv420_mode, mode);
230
231 /* VCLK Set clock */
232 meson_encoder_hdmi_set_vclk(encoder_hdmi, mode);
233
234 if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24)
235 /* Setup YUV420 to HDMI-TX, no 10bit diphering */
236 writel_relaxed(2 | (2 << 2),
237 priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
238 else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
239 /* Setup YUV422 to HDMI-TX, no 10bit diphering */
240 writel_relaxed(1 | (2 << 2),
241 priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
242 else
243 /* Setup YUV444 to HDMI-TX, no 10bit diphering */
244 writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
245
246 dev_dbg(priv->dev, "%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP");
247
248 if (priv->venc.hdmi_use_enci)
249 writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN));
250 else
251 writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
252 }
253
meson_encoder_hdmi_atomic_disable(struct drm_bridge * bridge,struct drm_atomic_state * state)254 static void meson_encoder_hdmi_atomic_disable(struct drm_bridge *bridge,
255 struct drm_atomic_state *state)
256 {
257 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
258 struct meson_drm *priv = encoder_hdmi->priv;
259
260 writel_bits_relaxed(0x3, 0,
261 priv->io_base + _REG(VPU_HDMI_SETTING));
262
263 writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN));
264 writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
265 }
266
267 static const u32 meson_encoder_hdmi_out_bus_fmts[] = {
268 MEDIA_BUS_FMT_YUV8_1X24,
269 MEDIA_BUS_FMT_UYVY8_1X16,
270 MEDIA_BUS_FMT_UYYVYY8_0_5X24,
271 };
272
273 static u32 *
meson_encoder_hdmi_get_inp_bus_fmts(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state,u32 output_fmt,unsigned int * num_input_fmts)274 meson_encoder_hdmi_get_inp_bus_fmts(struct drm_bridge *bridge,
275 struct drm_bridge_state *bridge_state,
276 struct drm_crtc_state *crtc_state,
277 struct drm_connector_state *conn_state,
278 u32 output_fmt,
279 unsigned int *num_input_fmts)
280 {
281 u32 *input_fmts = NULL;
282 int i;
283
284 *num_input_fmts = 0;
285
286 for (i = 0 ; i < ARRAY_SIZE(meson_encoder_hdmi_out_bus_fmts) ; ++i) {
287 if (output_fmt == meson_encoder_hdmi_out_bus_fmts[i]) {
288 *num_input_fmts = 1;
289 input_fmts = kcalloc(*num_input_fmts,
290 sizeof(*input_fmts),
291 GFP_KERNEL);
292 if (!input_fmts)
293 return NULL;
294
295 input_fmts[0] = output_fmt;
296
297 break;
298 }
299 }
300
301 return input_fmts;
302 }
303
meson_encoder_hdmi_atomic_check(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state,struct drm_crtc_state * crtc_state,struct drm_connector_state * conn_state)304 static int meson_encoder_hdmi_atomic_check(struct drm_bridge *bridge,
305 struct drm_bridge_state *bridge_state,
306 struct drm_crtc_state *crtc_state,
307 struct drm_connector_state *conn_state)
308 {
309 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
310 struct drm_connector_state *old_conn_state =
311 drm_atomic_get_old_connector_state(conn_state->state, conn_state->connector);
312 struct meson_drm *priv = encoder_hdmi->priv;
313
314 encoder_hdmi->output_bus_fmt = bridge_state->output_bus_cfg.format;
315
316 dev_dbg(priv->dev, "output_bus_fmt %lx\n", encoder_hdmi->output_bus_fmt);
317
318 if (!drm_connector_atomic_hdr_metadata_equal(old_conn_state, conn_state))
319 crtc_state->mode_changed = true;
320
321 return 0;
322 }
323
meson_encoder_hdmi_hpd_notify(struct drm_bridge * bridge,enum drm_connector_status status)324 static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge,
325 enum drm_connector_status status)
326 {
327 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
328
329 if (!encoder_hdmi->cec_notifier)
330 return;
331
332 if (status == connector_status_connected) {
333 const struct drm_edid *drm_edid;
334 const struct edid *edid;
335
336 drm_edid = drm_bridge_edid_read(encoder_hdmi->next_bridge,
337 encoder_hdmi->connector);
338 if (!drm_edid)
339 return;
340
341 /*
342 * FIXME: The CEC physical address should be set using
343 * cec_notifier_set_phys_addr(encoder_hdmi->cec_notifier,
344 * connector->display_info.source_physical_address) from a path
345 * that has read the EDID and called
346 * drm_edid_connector_update().
347 */
348 edid = drm_edid_raw(drm_edid);
349
350 cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid);
351
352 drm_edid_free(drm_edid);
353 } else
354 cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier);
355 }
356
357 static const struct drm_bridge_funcs meson_encoder_hdmi_bridge_funcs = {
358 .attach = meson_encoder_hdmi_attach,
359 .detach = meson_encoder_hdmi_detach,
360 .mode_valid = meson_encoder_hdmi_mode_valid,
361 .hpd_notify = meson_encoder_hdmi_hpd_notify,
362 .atomic_enable = meson_encoder_hdmi_atomic_enable,
363 .atomic_disable = meson_encoder_hdmi_atomic_disable,
364 .atomic_get_input_bus_fmts = meson_encoder_hdmi_get_inp_bus_fmts,
365 .atomic_check = meson_encoder_hdmi_atomic_check,
366 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
367 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
368 .atomic_reset = drm_atomic_helper_bridge_reset,
369 };
370
meson_encoder_hdmi_probe(struct meson_drm * priv)371 int meson_encoder_hdmi_probe(struct meson_drm *priv)
372 {
373 struct meson_encoder_hdmi *meson_encoder_hdmi;
374 struct platform_device *pdev;
375 struct device_node *remote;
376 int ret;
377
378 meson_encoder_hdmi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_hdmi), GFP_KERNEL);
379 if (!meson_encoder_hdmi)
380 return -ENOMEM;
381
382 /* HDMI Transceiver Bridge */
383 remote = of_graph_get_remote_node(priv->dev->of_node, 1, 0);
384 if (!remote) {
385 dev_err(priv->dev, "HDMI transceiver device is disabled");
386 return 0;
387 }
388
389 meson_encoder_hdmi->next_bridge = of_drm_find_bridge(remote);
390 if (!meson_encoder_hdmi->next_bridge) {
391 ret = dev_err_probe(priv->dev, -EPROBE_DEFER,
392 "Failed to find HDMI transceiver bridge\n");
393 goto err_put_node;
394 }
395
396 /* HDMI Encoder Bridge */
397 meson_encoder_hdmi->bridge.funcs = &meson_encoder_hdmi_bridge_funcs;
398 meson_encoder_hdmi->bridge.of_node = priv->dev->of_node;
399 meson_encoder_hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
400 meson_encoder_hdmi->bridge.interlace_allowed = true;
401
402 drm_bridge_add(&meson_encoder_hdmi->bridge);
403
404 meson_encoder_hdmi->priv = priv;
405
406 /* Encoder */
407 ret = drm_simple_encoder_init(priv->drm, &meson_encoder_hdmi->encoder,
408 DRM_MODE_ENCODER_TMDS);
409 if (ret) {
410 dev_err_probe(priv->dev, ret, "Failed to init HDMI encoder\n");
411 goto err_put_node;
412 }
413
414 meson_encoder_hdmi->encoder.possible_crtcs = BIT(0);
415
416 /* Attach HDMI Encoder Bridge to Encoder */
417 ret = drm_bridge_attach(&meson_encoder_hdmi->encoder, &meson_encoder_hdmi->bridge, NULL,
418 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
419 if (ret) {
420 dev_err_probe(priv->dev, ret, "Failed to attach bridge\n");
421 goto err_put_node;
422 }
423
424 /* Initialize & attach Bridge Connector */
425 meson_encoder_hdmi->connector = drm_bridge_connector_init(priv->drm,
426 &meson_encoder_hdmi->encoder);
427 if (IS_ERR(meson_encoder_hdmi->connector)) {
428 ret = dev_err_probe(priv->dev,
429 PTR_ERR(meson_encoder_hdmi->connector),
430 "Unable to create HDMI bridge connector\n");
431 goto err_put_node;
432 }
433 drm_connector_attach_encoder(meson_encoder_hdmi->connector,
434 &meson_encoder_hdmi->encoder);
435
436 /*
437 * We should have now in place:
438 * encoder->[hdmi encoder bridge]->[dw-hdmi bridge]->[display connector bridge]->[display connector]
439 */
440
441 /*
442 * drm_connector_attach_max_bpc_property() requires the
443 * connector to have a state.
444 */
445 drm_atomic_helper_connector_reset(meson_encoder_hdmi->connector);
446
447 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL) ||
448 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) ||
449 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A))
450 drm_connector_attach_hdr_output_metadata_property(meson_encoder_hdmi->connector);
451
452 drm_connector_attach_max_bpc_property(meson_encoder_hdmi->connector, 8, 8);
453
454 /* Handle this here until handled by drm_bridge_connector_init() */
455 meson_encoder_hdmi->connector->ycbcr_420_allowed = true;
456
457 pdev = of_find_device_by_node(remote);
458 of_node_put(remote);
459 if (pdev) {
460 struct cec_connector_info conn_info;
461 struct cec_notifier *notifier;
462
463 cec_fill_conn_info_from_drm(&conn_info, meson_encoder_hdmi->connector);
464
465 notifier = cec_notifier_conn_register(&pdev->dev, NULL, &conn_info);
466 if (!notifier) {
467 put_device(&pdev->dev);
468 return -ENOMEM;
469 }
470
471 meson_encoder_hdmi->cec_notifier = notifier;
472 }
473
474 priv->encoders[MESON_ENC_HDMI] = meson_encoder_hdmi;
475
476 dev_dbg(priv->dev, "HDMI encoder initialized\n");
477
478 return 0;
479
480 err_put_node:
481 of_node_put(remote);
482 return ret;
483 }
484
meson_encoder_hdmi_remove(struct meson_drm * priv)485 void meson_encoder_hdmi_remove(struct meson_drm *priv)
486 {
487 struct meson_encoder_hdmi *meson_encoder_hdmi;
488
489 if (priv->encoders[MESON_ENC_HDMI]) {
490 meson_encoder_hdmi = priv->encoders[MESON_ENC_HDMI];
491 drm_bridge_remove(&meson_encoder_hdmi->bridge);
492 }
493 }
494