Loading...
Note: File does not exist in v3.1.
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
38struct 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
51static 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
60static 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
68static 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 int phy_freq;
74 unsigned int vclk_freq;
75 unsigned int venc_freq;
76 unsigned int hdmi_freq;
77
78 vclk_freq = mode->clock;
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, "vclk:%d phy=%d venc=%d hdmi=%d enci=%d\n",
111 phy_freq, vclk_freq, venc_freq, hdmi_freq,
112 priv->venc.hdmi_use_enci);
113
114 meson_vclk_setup(priv, MESON_VCLK_TARGET_HDMI, phy_freq, vclk_freq,
115 venc_freq, hdmi_freq, priv->venc.hdmi_use_enci);
116}
117
118static enum drm_mode_status meson_encoder_hdmi_mode_valid(struct drm_bridge *bridge,
119 const struct drm_display_info *display_info,
120 const struct drm_display_mode *mode)
121{
122 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
123 struct meson_drm *priv = encoder_hdmi->priv;
124 bool is_hdmi2_sink = display_info->hdmi.scdc.supported;
125 unsigned int phy_freq;
126 unsigned int vclk_freq;
127 unsigned int venc_freq;
128 unsigned int hdmi_freq;
129 int vic = drm_match_cea_mode(mode);
130 enum drm_mode_status status;
131
132 dev_dbg(priv->dev, "Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode));
133
134 /* If sink does not support 540MHz, reject the non-420 HDMI2 modes */
135 if (display_info->max_tmds_clock &&
136 mode->clock > display_info->max_tmds_clock &&
137 !drm_mode_is_420_only(display_info, mode) &&
138 !drm_mode_is_420_also(display_info, mode))
139 return MODE_BAD;
140
141 /* Check against non-VIC supported modes */
142 if (!vic) {
143 status = meson_venc_hdmi_supported_mode(mode);
144 if (status != MODE_OK)
145 return status;
146
147 return meson_vclk_dmt_supported_freq(priv, mode->clock);
148 /* Check against supported VIC modes */
149 } else if (!meson_venc_hdmi_supported_vic(vic))
150 return MODE_BAD;
151
152 vclk_freq = mode->clock;
153
154 /* For 420, pixel clock is half unlike venc clock */
155 if (drm_mode_is_420_only(display_info, mode) ||
156 (!is_hdmi2_sink &&
157 drm_mode_is_420_also(display_info, mode)))
158 vclk_freq /= 2;
159
160 /* TMDS clock is pixel_clock * 10 */
161 phy_freq = vclk_freq * 10;
162
163 /* 480i/576i needs global pixel doubling */
164 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
165 vclk_freq *= 2;
166
167 venc_freq = vclk_freq;
168 hdmi_freq = vclk_freq;
169
170 /* VENC double pixels for 1080i, 720p and YUV420 modes */
171 if (meson_venc_hdmi_venc_repeat(vic) ||
172 drm_mode_is_420_only(display_info, mode) ||
173 (!is_hdmi2_sink &&
174 drm_mode_is_420_also(display_info, mode)))
175 venc_freq *= 2;
176
177 vclk_freq = max(venc_freq, hdmi_freq);
178
179 if (mode->flags & DRM_MODE_FLAG_DBLCLK)
180 venc_freq /= 2;
181
182 dev_dbg(priv->dev, "%s: vclk:%d phy=%d venc=%d hdmi=%d\n",
183 __func__, phy_freq, vclk_freq, venc_freq, hdmi_freq);
184
185 return meson_vclk_vic_supported_freq(priv, phy_freq, vclk_freq);
186}
187
188static void meson_encoder_hdmi_atomic_enable(struct drm_bridge *bridge,
189 struct drm_bridge_state *bridge_state)
190{
191 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
192 struct drm_atomic_state *state = bridge_state->base.state;
193 unsigned int ycrcb_map = VPU_HDMI_OUTPUT_CBYCR;
194 struct meson_drm *priv = encoder_hdmi->priv;
195 struct drm_connector_state *conn_state;
196 const struct drm_display_mode *mode;
197 struct drm_crtc_state *crtc_state;
198 struct drm_connector *connector;
199 bool yuv420_mode = false;
200 int vic;
201
202 connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);
203 if (WARN_ON(!connector))
204 return;
205
206 conn_state = drm_atomic_get_new_connector_state(state, connector);
207 if (WARN_ON(!conn_state))
208 return;
209
210 crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
211 if (WARN_ON(!crtc_state))
212 return;
213
214 mode = &crtc_state->adjusted_mode;
215
216 vic = drm_match_cea_mode(mode);
217
218 dev_dbg(priv->dev, "\"%s\" vic %d\n", mode->name, vic);
219
220 if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) {
221 ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
222 yuv420_mode = true;
223 } else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
224 ycrcb_map = VPU_HDMI_OUTPUT_CRYCB;
225
226 /* VENC + VENC-DVI Mode setup */
227 meson_venc_hdmi_mode_set(priv, vic, ycrcb_map, yuv420_mode, mode);
228
229 /* VCLK Set clock */
230 meson_encoder_hdmi_set_vclk(encoder_hdmi, mode);
231
232 if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24)
233 /* Setup YUV420 to HDMI-TX, no 10bit diphering */
234 writel_relaxed(2 | (2 << 2),
235 priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
236 else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16)
237 /* Setup YUV422 to HDMI-TX, no 10bit diphering */
238 writel_relaxed(1 | (2 << 2),
239 priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
240 else
241 /* Setup YUV444 to HDMI-TX, no 10bit diphering */
242 writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL));
243
244 dev_dbg(priv->dev, "%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP");
245
246 if (priv->venc.hdmi_use_enci)
247 writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN));
248 else
249 writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN));
250}
251
252static void meson_encoder_hdmi_atomic_disable(struct drm_bridge *bridge,
253 struct drm_bridge_state *bridge_state)
254{
255 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
256 struct meson_drm *priv = encoder_hdmi->priv;
257
258 writel_bits_relaxed(0x3, 0,
259 priv->io_base + _REG(VPU_HDMI_SETTING));
260
261 writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN));
262 writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN));
263}
264
265static const u32 meson_encoder_hdmi_out_bus_fmts[] = {
266 MEDIA_BUS_FMT_YUV8_1X24,
267 MEDIA_BUS_FMT_UYVY8_1X16,
268 MEDIA_BUS_FMT_UYYVYY8_0_5X24,
269};
270
271static u32 *
272meson_encoder_hdmi_get_inp_bus_fmts(struct drm_bridge *bridge,
273 struct drm_bridge_state *bridge_state,
274 struct drm_crtc_state *crtc_state,
275 struct drm_connector_state *conn_state,
276 u32 output_fmt,
277 unsigned int *num_input_fmts)
278{
279 u32 *input_fmts = NULL;
280 int i;
281
282 *num_input_fmts = 0;
283
284 for (i = 0 ; i < ARRAY_SIZE(meson_encoder_hdmi_out_bus_fmts) ; ++i) {
285 if (output_fmt == meson_encoder_hdmi_out_bus_fmts[i]) {
286 *num_input_fmts = 1;
287 input_fmts = kcalloc(*num_input_fmts,
288 sizeof(*input_fmts),
289 GFP_KERNEL);
290 if (!input_fmts)
291 return NULL;
292
293 input_fmts[0] = output_fmt;
294
295 break;
296 }
297 }
298
299 return input_fmts;
300}
301
302static int meson_encoder_hdmi_atomic_check(struct drm_bridge *bridge,
303 struct drm_bridge_state *bridge_state,
304 struct drm_crtc_state *crtc_state,
305 struct drm_connector_state *conn_state)
306{
307 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
308 struct drm_connector_state *old_conn_state =
309 drm_atomic_get_old_connector_state(conn_state->state, conn_state->connector);
310 struct meson_drm *priv = encoder_hdmi->priv;
311
312 encoder_hdmi->output_bus_fmt = bridge_state->output_bus_cfg.format;
313
314 dev_dbg(priv->dev, "output_bus_fmt %lx\n", encoder_hdmi->output_bus_fmt);
315
316 if (!drm_connector_atomic_hdr_metadata_equal(old_conn_state, conn_state))
317 crtc_state->mode_changed = true;
318
319 return 0;
320}
321
322static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge,
323 enum drm_connector_status status)
324{
325 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge);
326 struct edid *edid;
327
328 if (!encoder_hdmi->cec_notifier)
329 return;
330
331 if (status == connector_status_connected) {
332 edid = drm_bridge_get_edid(encoder_hdmi->next_bridge, encoder_hdmi->connector);
333 if (!edid)
334 return;
335
336 cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid);
337
338 kfree(edid);
339 } else
340 cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier);
341}
342
343static const struct drm_bridge_funcs meson_encoder_hdmi_bridge_funcs = {
344 .attach = meson_encoder_hdmi_attach,
345 .detach = meson_encoder_hdmi_detach,
346 .mode_valid = meson_encoder_hdmi_mode_valid,
347 .hpd_notify = meson_encoder_hdmi_hpd_notify,
348 .atomic_enable = meson_encoder_hdmi_atomic_enable,
349 .atomic_disable = meson_encoder_hdmi_atomic_disable,
350 .atomic_get_input_bus_fmts = meson_encoder_hdmi_get_inp_bus_fmts,
351 .atomic_check = meson_encoder_hdmi_atomic_check,
352 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
353 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
354 .atomic_reset = drm_atomic_helper_bridge_reset,
355};
356
357int meson_encoder_hdmi_init(struct meson_drm *priv)
358{
359 struct meson_encoder_hdmi *meson_encoder_hdmi;
360 struct platform_device *pdev;
361 struct device_node *remote;
362 int ret;
363
364 meson_encoder_hdmi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_hdmi), GFP_KERNEL);
365 if (!meson_encoder_hdmi)
366 return -ENOMEM;
367
368 /* HDMI Transceiver Bridge */
369 remote = of_graph_get_remote_node(priv->dev->of_node, 1, 0);
370 if (!remote) {
371 dev_err(priv->dev, "HDMI transceiver device is disabled");
372 return 0;
373 }
374
375 meson_encoder_hdmi->next_bridge = of_drm_find_bridge(remote);
376 if (!meson_encoder_hdmi->next_bridge) {
377 dev_err(priv->dev, "Failed to find HDMI transceiver bridge\n");
378 ret = -EPROBE_DEFER;
379 goto err_put_node;
380 }
381
382 /* HDMI Encoder Bridge */
383 meson_encoder_hdmi->bridge.funcs = &meson_encoder_hdmi_bridge_funcs;
384 meson_encoder_hdmi->bridge.of_node = priv->dev->of_node;
385 meson_encoder_hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA;
386 meson_encoder_hdmi->bridge.interlace_allowed = true;
387
388 drm_bridge_add(&meson_encoder_hdmi->bridge);
389
390 meson_encoder_hdmi->priv = priv;
391
392 /* Encoder */
393 ret = drm_simple_encoder_init(priv->drm, &meson_encoder_hdmi->encoder,
394 DRM_MODE_ENCODER_TMDS);
395 if (ret) {
396 dev_err(priv->dev, "Failed to init HDMI encoder: %d\n", ret);
397 goto err_put_node;
398 }
399
400 meson_encoder_hdmi->encoder.possible_crtcs = BIT(0);
401
402 /* Attach HDMI Encoder Bridge to Encoder */
403 ret = drm_bridge_attach(&meson_encoder_hdmi->encoder, &meson_encoder_hdmi->bridge, NULL,
404 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
405 if (ret) {
406 dev_err(priv->dev, "Failed to attach bridge: %d\n", ret);
407 goto err_put_node;
408 }
409
410 /* Initialize & attach Bridge Connector */
411 meson_encoder_hdmi->connector = drm_bridge_connector_init(priv->drm,
412 &meson_encoder_hdmi->encoder);
413 if (IS_ERR(meson_encoder_hdmi->connector)) {
414 dev_err(priv->dev, "Unable to create HDMI bridge connector\n");
415 ret = PTR_ERR(meson_encoder_hdmi->connector);
416 goto err_put_node;
417 }
418 drm_connector_attach_encoder(meson_encoder_hdmi->connector,
419 &meson_encoder_hdmi->encoder);
420
421 /*
422 * We should have now in place:
423 * encoder->[hdmi encoder bridge]->[dw-hdmi bridge]->[display connector bridge]->[display connector]
424 */
425
426 /*
427 * drm_connector_attach_max_bpc_property() requires the
428 * connector to have a state.
429 */
430 drm_atomic_helper_connector_reset(meson_encoder_hdmi->connector);
431
432 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL) ||
433 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) ||
434 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A))
435 drm_connector_attach_hdr_output_metadata_property(meson_encoder_hdmi->connector);
436
437 drm_connector_attach_max_bpc_property(meson_encoder_hdmi->connector, 8, 8);
438
439 /* Handle this here until handled by drm_bridge_connector_init() */
440 meson_encoder_hdmi->connector->ycbcr_420_allowed = true;
441
442 pdev = of_find_device_by_node(remote);
443 of_node_put(remote);
444 if (pdev) {
445 struct cec_connector_info conn_info;
446 struct cec_notifier *notifier;
447
448 cec_fill_conn_info_from_drm(&conn_info, meson_encoder_hdmi->connector);
449
450 notifier = cec_notifier_conn_register(&pdev->dev, NULL, &conn_info);
451 if (!notifier) {
452 put_device(&pdev->dev);
453 return -ENOMEM;
454 }
455
456 meson_encoder_hdmi->cec_notifier = notifier;
457 }
458
459 priv->encoders[MESON_ENC_HDMI] = meson_encoder_hdmi;
460
461 dev_dbg(priv->dev, "HDMI encoder initialized\n");
462
463 return 0;
464
465err_put_node:
466 of_node_put(remote);
467 return ret;
468}
469
470void meson_encoder_hdmi_remove(struct meson_drm *priv)
471{
472 struct meson_encoder_hdmi *meson_encoder_hdmi;
473
474 if (priv->encoders[MESON_ENC_HDMI]) {
475 meson_encoder_hdmi = priv->encoders[MESON_ENC_HDMI];
476 drm_bridge_remove(&meson_encoder_hdmi->bridge);
477 }
478}