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 "phy:%lluHz vclk=%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_bridge_state * bridge_state)191 static void meson_encoder_hdmi_atomic_enable(struct drm_bridge *bridge,
192 struct drm_bridge_state *bridge_state)
193 {
194 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
195 struct drm_atomic_state *state = bridge_state->base.state;
196 unsigned int ycrcb_map = VPU_HDMI_OUTPUT_CBYCR;
197 struct meson_drm *priv = encoder_hdmi->priv;
198 struct drm_connector_state *conn_state;
199 const struct drm_display_mode *mode;
200 struct drm_crtc_state *crtc_state;
201 struct drm_connector *connector;
202 bool yuv420_mode = false;
203 int vic;
204
205 connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
206 if (WARN_ON(!connector))
207 return;
208
209 conn_state = drm_atomic_get_new_connector_state(state, connector);
210 if (WARN_ON(!conn_state))
211 return;
212
213 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
214 if (WARN_ON(!crtc_state))
215 return;
216
217 mode = &crtc_state->adjusted_mode;
218
219 vic = drm_match_cea_mode(mode);
220
221 dev_dbg(priv->dev, "\"%s\" vic %d\n", mode->name, vic);
222
223 if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) {
224 ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
225 yuv420_mode = true;
226 } else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
227 ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
228
229 /* VENC + VENC-DVI Mode setup */
230 meson_venc_hdmi_mode_set(priv, vic, ycrcb_map, yuv420_mode, mode);
231
232 /* VCLK Set clock */
233 meson_encoder_hdmi_set_vclk(encoder_hdmi, mode);
234
235 if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24)
236 /* Setup YUV420 to HDMI-TX, no 10bit diphering */
237 writel_relaxed(2 | (2 << 2),
238 priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
239 else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
240 /* Setup YUV422 to HDMI-TX, no 10bit diphering */
241 writel_relaxed(1 | (2 << 2),
242 priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
243 else
244 /* Setup YUV444 to HDMI-TX, no 10bit diphering */
245 writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
246
247 dev_dbg(priv->dev, "%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP");
248
249 if (priv->venc.hdmi_use_enci)
250 writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN));
251 else
252 writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
253 }
254
meson_encoder_hdmi_atomic_disable(struct drm_bridge * bridge,struct drm_bridge_state * bridge_state)255 static void meson_encoder_hdmi_atomic_disable(struct drm_bridge *bridge,
256 struct drm_bridge_state *bridge_state)
257 {
258 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
259 struct meson_drm *priv = encoder_hdmi->priv;
260
261 writel_bits_relaxed(0x3, 0,
262 priv->io_base + _REG(VPU_HDMI_SETTING));
263
264 writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN));
265 writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
266 }
267
268 static const u32 meson_encoder_hdmi_out_bus_fmts[] = {
269 MEDIA_BUS_FMT_YUV8_1X24,
270 MEDIA_BUS_FMT_UYVY8_1X16,
271 MEDIA_BUS_FMT_UYYVYY8_0_5X24,
272 };
273
274 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)275 meson_encoder_hdmi_get_inp_bus_fmts(struct drm_bridge *bridge,
276 struct drm_bridge_state *bridge_state,
277 struct drm_crtc_state *crtc_state,
278 struct drm_connector_state *conn_state,
279 u32 output_fmt,
280 unsigned int *num_input_fmts)
281 {
282 u32 *input_fmts = NULL;
283 int i;
284
285 *num_input_fmts = 0;
286
287 for (i = 0 ; i < ARRAY_SIZE(meson_encoder_hdmi_out_bus_fmts) ; ++i) {
288 if (output_fmt == meson_encoder_hdmi_out_bus_fmts[i]) {
289 *num_input_fmts = 1;
290 input_fmts = kcalloc(*num_input_fmts,
291 sizeof(*input_fmts),
292 GFP_KERNEL);
293 if (!input_fmts)
294 return NULL;
295
296 input_fmts[0] = output_fmt;
297
298 break;
299 }
300 }
301
302 return input_fmts;
303 }
304
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)305 static int meson_encoder_hdmi_atomic_check(struct drm_bridge *bridge,
306 struct drm_bridge_state *bridge_state,
307 struct drm_crtc_state *crtc_state,
308 struct drm_connector_state *conn_state)
309 {
310 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
311 struct drm_connector_state *old_conn_state =
312 drm_atomic_get_old_connector_state(conn_state->state, conn_state->connector);
313 struct meson_drm *priv = encoder_hdmi->priv;
314
315 encoder_hdmi->output_bus_fmt = bridge_state->output_bus_cfg.format;
316
317 dev_dbg(priv->dev, "output_bus_fmt %lx\n", encoder_hdmi->output_bus_fmt);
318
319 if (!drm_connector_atomic_hdr_metadata_equal(old_conn_state, conn_state))
320 crtc_state->mode_changed = true;
321
322 return 0;
323 }
324
meson_encoder_hdmi_hpd_notify(struct drm_bridge * bridge,enum drm_connector_status status)325 static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge,
326 enum drm_connector_status status)
327 {
328 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
329 struct edid *edid;
330
331 if (!encoder_hdmi->cec_notifier)
332 return;
333
334 if (status == connector_status_connected) {
335 edid = drm_bridge_get_edid(encoder_hdmi->next_bridge, encoder_hdmi->connector);
336 if (!edid)
337 return;
338
339 cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid);
340
341 kfree(edid);
342 } else
343 cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier);
344 }
345
346 static const struct drm_bridge_funcs meson_encoder_hdmi_bridge_funcs = {
347 .attach = meson_encoder_hdmi_attach,
348 .detach = meson_encoder_hdmi_detach,
349 .mode_valid = meson_encoder_hdmi_mode_valid,
350 .hpd_notify = meson_encoder_hdmi_hpd_notify,
351 .atomic_enable = meson_encoder_hdmi_atomic_enable,
352 .atomic_disable = meson_encoder_hdmi_atomic_disable,
353 .atomic_get_input_bus_fmts = meson_encoder_hdmi_get_inp_bus_fmts,
354 .atomic_check = meson_encoder_hdmi_atomic_check,
355 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
356 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
357 .atomic_reset = drm_atomic_helper_bridge_reset,
358 };
359
meson_encoder_hdmi_init(struct meson_drm * priv)360 int meson_encoder_hdmi_init(struct meson_drm *priv)
361 {
362 struct meson_encoder_hdmi *meson_encoder_hdmi;
363 struct platform_device *pdev;
364 struct device_node *remote;
365 int ret;
366
367 meson_encoder_hdmi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_hdmi), GFP_KERNEL);
368 if (!meson_encoder_hdmi)
369 return -ENOMEM;
370
371 /* HDMI Transceiver Bridge */
372 remote = of_graph_get_remote_node(priv->dev->of_node, 1, 0);
373 if (!remote) {
374 dev_err(priv->dev, "HDMI transceiver device is disabled");
375 return 0;
376 }
377
378 meson_encoder_hdmi->next_bridge = of_drm_find_bridge(remote);
379 if (!meson_encoder_hdmi->next_bridge) {
380 dev_err(priv->dev, "Failed to find HDMI transceiver bridge\n");
381 ret = -EPROBE_DEFER;
382 goto err_put_node;
383 }
384
385 /* HDMI Encoder Bridge */
386 meson_encoder_hdmi->bridge.funcs = &meson_encoder_hdmi_bridge_funcs;
387 meson_encoder_hdmi->bridge.of_node = priv->dev->of_node;
388 meson_encoder_hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
389 meson_encoder_hdmi->bridge.interlace_allowed = true;
390
391 drm_bridge_add(&meson_encoder_hdmi->bridge);
392
393 meson_encoder_hdmi->priv = priv;
394
395 /* Encoder */
396 ret = drm_simple_encoder_init(priv->drm, &meson_encoder_hdmi->encoder,
397 DRM_MODE_ENCODER_TMDS);
398 if (ret) {
399 dev_err(priv->dev, "Failed to init HDMI encoder: %d\n", ret);
400 goto err_put_node;
401 }
402
403 meson_encoder_hdmi->encoder.possible_crtcs = BIT(0);
404
405 /* Attach HDMI Encoder Bridge to Encoder */
406 ret = drm_bridge_attach(&meson_encoder_hdmi->encoder, &meson_encoder_hdmi->bridge, NULL,
407 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
408 if (ret) {
409 dev_err(priv->dev, "Failed to attach bridge: %d\n", ret);
410 goto err_put_node;
411 }
412
413 /* Initialize & attach Bridge Connector */
414 meson_encoder_hdmi->connector = drm_bridge_connector_init(priv->drm,
415 &meson_encoder_hdmi->encoder);
416 if (IS_ERR(meson_encoder_hdmi->connector)) {
417 dev_err(priv->dev, "Unable to create HDMI bridge connector\n");
418 ret = PTR_ERR(meson_encoder_hdmi->connector);
419 goto err_put_node;
420 }
421 drm_connector_attach_encoder(meson_encoder_hdmi->connector,
422 &meson_encoder_hdmi->encoder);
423
424 /*
425 * We should have now in place:
426 * encoder->[hdmi encoder bridge]->[dw-hdmi bridge]->[display connector bridge]->[display connector]
427 */
428
429 /*
430 * drm_connector_attach_max_bpc_property() requires the
431 * connector to have a state.
432 */
433 drm_atomic_helper_connector_reset(meson_encoder_hdmi->connector);
434
435 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL) ||
436 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) ||
437 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A))
438 drm_connector_attach_hdr_output_metadata_property(meson_encoder_hdmi->connector);
439
440 drm_connector_attach_max_bpc_property(meson_encoder_hdmi->connector, 8, 8);
441
442 /* Handle this here until handled by drm_bridge_connector_init() */
443 meson_encoder_hdmi->connector->ycbcr_420_allowed = true;
444
445 pdev = of_find_device_by_node(remote);
446 of_node_put(remote);
447 if (pdev) {
448 struct cec_connector_info conn_info;
449 struct cec_notifier *notifier;
450
451 cec_fill_conn_info_from_drm(&conn_info, meson_encoder_hdmi->connector);
452
453 notifier = cec_notifier_conn_register(&pdev->dev, NULL, &conn_info);
454 if (!notifier) {
455 put_device(&pdev->dev);
456 return -ENOMEM;
457 }
458
459 meson_encoder_hdmi->cec_notifier = notifier;
460 }
461
462 priv->encoders[MESON_ENC_HDMI] = meson_encoder_hdmi;
463
464 dev_dbg(priv->dev, "HDMI encoder initialized\n");
465
466 return 0;
467
468 err_put_node:
469 of_node_put(remote);
470 return ret;
471 }
472
meson_encoder_hdmi_remove(struct meson_drm * priv)473 void meson_encoder_hdmi_remove(struct meson_drm *priv)
474 {
475 struct meson_encoder_hdmi *meson_encoder_hdmi;
476
477 if (priv->encoders[MESON_ENC_HDMI]) {
478 meson_encoder_hdmi = priv->encoders[MESON_ENC_HDMI];
479 drm_bridge_remove(&meson_encoder_hdmi->bridge);
480 }
481 }
482