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e67f6037 NA |
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_device.h> | |
13 | #include <linux/of_graph.h> | |
14 | #include <linux/regulator/consumer.h> | |
15 | #include <linux/reset.h> | |
16 | ||
0af5e0b4 NA |
17 | #include <media/cec-notifier.h> |
18 | ||
e67f6037 NA |
19 | #include <drm/drm_atomic_helper.h> |
20 | #include <drm/drm_bridge.h> | |
0af5e0b4 | 21 | #include <drm/drm_bridge_connector.h> |
e67f6037 NA |
22 | #include <drm/drm_device.h> |
23 | #include <drm/drm_edid.h> | |
24 | #include <drm/drm_probe_helper.h> | |
25 | #include <drm/drm_simple_kms_helper.h> | |
26 | ||
27 | #include <linux/media-bus-format.h> | |
28 | #include <linux/videodev2.h> | |
29 | ||
30 | #include "meson_drv.h" | |
31 | #include "meson_registers.h" | |
32 | #include "meson_vclk.h" | |
33 | #include "meson_venc.h" | |
34 | #include "meson_encoder_hdmi.h" | |
35 | ||
36 | struct meson_encoder_hdmi { | |
37 | struct drm_encoder encoder; | |
38 | struct drm_bridge bridge; | |
39 | struct drm_bridge *next_bridge; | |
0af5e0b4 | 40 | struct drm_connector *connector; |
e67f6037 NA |
41 | struct meson_drm *priv; |
42 | unsigned long output_bus_fmt; | |
0af5e0b4 | 43 | struct cec_notifier *cec_notifier; |
e67f6037 NA |
44 | }; |
45 | ||
46 | #define bridge_to_meson_encoder_hdmi(x) \ | |
47 | container_of(x, struct meson_encoder_hdmi, bridge) | |
48 | ||
49 | static int meson_encoder_hdmi_attach(struct drm_bridge *bridge, | |
50 | enum drm_bridge_attach_flags flags) | |
51 | { | |
52 | struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); | |
53 | ||
54 | return drm_bridge_attach(bridge->encoder, encoder_hdmi->next_bridge, | |
55 | &encoder_hdmi->bridge, flags); | |
56 | } | |
57 | ||
0af5e0b4 NA |
58 | static void meson_encoder_hdmi_detach(struct drm_bridge *bridge) |
59 | { | |
60 | struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); | |
61 | ||
62 | cec_notifier_conn_unregister(encoder_hdmi->cec_notifier); | |
63 | encoder_hdmi->cec_notifier = NULL; | |
64 | } | |
65 | ||
e67f6037 NA |
66 | static void meson_encoder_hdmi_set_vclk(struct meson_encoder_hdmi *encoder_hdmi, |
67 | const struct drm_display_mode *mode) | |
68 | { | |
69 | struct meson_drm *priv = encoder_hdmi->priv; | |
70 | int vic = drm_match_cea_mode(mode); | |
71 | unsigned int phy_freq; | |
72 | unsigned int vclk_freq; | |
73 | unsigned int venc_freq; | |
74 | unsigned int hdmi_freq; | |
75 | ||
76 | vclk_freq = mode->clock; | |
77 | ||
78 | /* For 420, pixel clock is half unlike venc clock */ | |
79 | if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) | |
80 | vclk_freq /= 2; | |
81 | ||
82 | /* TMDS clock is pixel_clock * 10 */ | |
83 | phy_freq = vclk_freq * 10; | |
84 | ||
85 | if (!vic) { | |
86 | meson_vclk_setup(priv, MESON_VCLK_TARGET_DMT, phy_freq, | |
87 | vclk_freq, vclk_freq, vclk_freq, false); | |
88 | return; | |
89 | } | |
90 | ||
91 | /* 480i/576i needs global pixel doubling */ | |
92 | if (mode->flags & DRM_MODE_FLAG_DBLCLK) | |
93 | vclk_freq *= 2; | |
94 | ||
95 | venc_freq = vclk_freq; | |
96 | hdmi_freq = vclk_freq; | |
97 | ||
98 | /* VENC double pixels for 1080i, 720p and YUV420 modes */ | |
99 | if (meson_venc_hdmi_venc_repeat(vic) || | |
100 | encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) | |
101 | venc_freq *= 2; | |
102 | ||
103 | vclk_freq = max(venc_freq, hdmi_freq); | |
104 | ||
105 | if (mode->flags & DRM_MODE_FLAG_DBLCLK) | |
106 | venc_freq /= 2; | |
107 | ||
108 | dev_dbg(priv->dev, "vclk:%d phy=%d venc=%d hdmi=%d enci=%d\n", | |
109 | phy_freq, vclk_freq, venc_freq, hdmi_freq, | |
110 | priv->venc.hdmi_use_enci); | |
111 | ||
112 | meson_vclk_setup(priv, MESON_VCLK_TARGET_HDMI, phy_freq, vclk_freq, | |
113 | venc_freq, hdmi_freq, priv->venc.hdmi_use_enci); | |
114 | } | |
115 | ||
116 | static enum drm_mode_status meson_encoder_hdmi_mode_valid(struct drm_bridge *bridge, | |
117 | const struct drm_display_info *display_info, | |
118 | const struct drm_display_mode *mode) | |
119 | { | |
120 | struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); | |
121 | struct meson_drm *priv = encoder_hdmi->priv; | |
122 | bool is_hdmi2_sink = display_info->hdmi.scdc.supported; | |
123 | unsigned int phy_freq; | |
124 | unsigned int vclk_freq; | |
125 | unsigned int venc_freq; | |
126 | unsigned int hdmi_freq; | |
127 | int vic = drm_match_cea_mode(mode); | |
128 | enum drm_mode_status status; | |
129 | ||
130 | dev_dbg(priv->dev, "Modeline " DRM_MODE_FMT "\n", DRM_MODE_ARG(mode)); | |
131 | ||
132 | /* If sink does not support 540MHz, reject the non-420 HDMI2 modes */ | |
133 | if (display_info->max_tmds_clock && | |
134 | mode->clock > display_info->max_tmds_clock && | |
135 | !drm_mode_is_420_only(display_info, mode) && | |
136 | !drm_mode_is_420_also(display_info, mode)) | |
137 | return MODE_BAD; | |
138 | ||
139 | /* Check against non-VIC supported modes */ | |
140 | if (!vic) { | |
141 | status = meson_venc_hdmi_supported_mode(mode); | |
142 | if (status != MODE_OK) | |
143 | return status; | |
144 | ||
145 | return meson_vclk_dmt_supported_freq(priv, mode->clock); | |
146 | /* Check against supported VIC modes */ | |
147 | } else if (!meson_venc_hdmi_supported_vic(vic)) | |
148 | return MODE_BAD; | |
149 | ||
150 | vclk_freq = mode->clock; | |
151 | ||
152 | /* For 420, pixel clock is half unlike venc clock */ | |
153 | if (drm_mode_is_420_only(display_info, mode) || | |
154 | (!is_hdmi2_sink && | |
155 | drm_mode_is_420_also(display_info, mode))) | |
156 | vclk_freq /= 2; | |
157 | ||
158 | /* TMDS clock is pixel_clock * 10 */ | |
159 | phy_freq = vclk_freq * 10; | |
160 | ||
161 | /* 480i/576i needs global pixel doubling */ | |
162 | if (mode->flags & DRM_MODE_FLAG_DBLCLK) | |
163 | vclk_freq *= 2; | |
164 | ||
165 | venc_freq = vclk_freq; | |
166 | hdmi_freq = vclk_freq; | |
167 | ||
168 | /* VENC double pixels for 1080i, 720p and YUV420 modes */ | |
169 | if (meson_venc_hdmi_venc_repeat(vic) || | |
170 | drm_mode_is_420_only(display_info, mode) || | |
171 | (!is_hdmi2_sink && | |
172 | drm_mode_is_420_also(display_info, mode))) | |
173 | venc_freq *= 2; | |
174 | ||
175 | vclk_freq = max(venc_freq, hdmi_freq); | |
176 | ||
177 | if (mode->flags & DRM_MODE_FLAG_DBLCLK) | |
178 | venc_freq /= 2; | |
179 | ||
180 | dev_dbg(priv->dev, "%s: vclk:%d phy=%d venc=%d hdmi=%d\n", | |
181 | __func__, phy_freq, vclk_freq, venc_freq, hdmi_freq); | |
182 | ||
183 | return meson_vclk_vic_supported_freq(priv, phy_freq, vclk_freq); | |
184 | } | |
185 | ||
186 | static void meson_encoder_hdmi_atomic_enable(struct drm_bridge *bridge, | |
187 | struct drm_bridge_state *bridge_state) | |
188 | { | |
189 | struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); | |
190 | struct drm_atomic_state *state = bridge_state->base.state; | |
191 | unsigned int ycrcb_map = VPU_HDMI_OUTPUT_CBYCR; | |
192 | struct meson_drm *priv = encoder_hdmi->priv; | |
193 | struct drm_connector_state *conn_state; | |
194 | const struct drm_display_mode *mode; | |
195 | struct drm_crtc_state *crtc_state; | |
196 | struct drm_connector *connector; | |
197 | bool yuv420_mode = false; | |
198 | int vic; | |
199 | ||
200 | connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder); | |
201 | if (WARN_ON(!connector)) | |
202 | return; | |
203 | ||
204 | conn_state = drm_atomic_get_new_connector_state(state, connector); | |
205 | if (WARN_ON(!conn_state)) | |
206 | return; | |
207 | ||
208 | crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc); | |
209 | if (WARN_ON(!crtc_state)) | |
210 | return; | |
211 | ||
212 | mode = &crtc_state->adjusted_mode; | |
213 | ||
214 | vic = drm_match_cea_mode(mode); | |
215 | ||
216 | dev_dbg(priv->dev, "\"%s\" vic %d\n", mode->name, vic); | |
217 | ||
218 | if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) { | |
219 | ycrcb_map = VPU_HDMI_OUTPUT_CRYCB; | |
220 | yuv420_mode = true; | |
c193a003 DK |
221 | } else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16) |
222 | ycrcb_map = VPU_HDMI_OUTPUT_CRYCB; | |
e67f6037 NA |
223 | |
224 | /* VENC + VENC-DVI Mode setup */ | |
225 | meson_venc_hdmi_mode_set(priv, vic, ycrcb_map, yuv420_mode, mode); | |
226 | ||
227 | /* VCLK Set clock */ | |
228 | meson_encoder_hdmi_set_vclk(encoder_hdmi, mode); | |
229 | ||
230 | if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) | |
231 | /* Setup YUV420 to HDMI-TX, no 10bit diphering */ | |
232 | writel_relaxed(2 | (2 << 2), | |
233 | priv->io_base + _REG(VPU_HDMI_FMT_CTRL)); | |
c193a003 DK |
234 | else if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYVY8_1X16) |
235 | /* Setup YUV422 to HDMI-TX, no 10bit diphering */ | |
236 | writel_relaxed(1 | (2 << 2), | |
237 | priv->io_base + _REG(VPU_HDMI_FMT_CTRL)); | |
e67f6037 NA |
238 | else |
239 | /* Setup YUV444 to HDMI-TX, no 10bit diphering */ | |
240 | writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL)); | |
241 | ||
242 | dev_dbg(priv->dev, "%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP"); | |
243 | ||
244 | if (priv->venc.hdmi_use_enci) | |
245 | writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN)); | |
246 | else | |
247 | writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN)); | |
248 | } | |
249 | ||
250 | static void meson_encoder_hdmi_atomic_disable(struct drm_bridge *bridge, | |
251 | struct drm_bridge_state *bridge_state) | |
252 | { | |
253 | struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); | |
254 | struct meson_drm *priv = encoder_hdmi->priv; | |
255 | ||
256 | writel_bits_relaxed(0x3, 0, | |
257 | priv->io_base + _REG(VPU_HDMI_SETTING)); | |
258 | ||
259 | writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN)); | |
260 | writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN)); | |
261 | } | |
262 | ||
263 | static const u32 meson_encoder_hdmi_out_bus_fmts[] = { | |
264 | MEDIA_BUS_FMT_YUV8_1X24, | |
c193a003 | 265 | MEDIA_BUS_FMT_UYVY8_1X16, |
e67f6037 NA |
266 | MEDIA_BUS_FMT_UYYVYY8_0_5X24, |
267 | }; | |
268 | ||
269 | static u32 * | |
270 | meson_encoder_hdmi_get_inp_bus_fmts(struct drm_bridge *bridge, | |
271 | struct drm_bridge_state *bridge_state, | |
272 | struct drm_crtc_state *crtc_state, | |
273 | struct drm_connector_state *conn_state, | |
274 | u32 output_fmt, | |
275 | unsigned int *num_input_fmts) | |
276 | { | |
277 | u32 *input_fmts = NULL; | |
278 | int i; | |
279 | ||
280 | *num_input_fmts = 0; | |
281 | ||
282 | for (i = 0 ; i < ARRAY_SIZE(meson_encoder_hdmi_out_bus_fmts) ; ++i) { | |
283 | if (output_fmt == meson_encoder_hdmi_out_bus_fmts[i]) { | |
284 | *num_input_fmts = 1; | |
285 | input_fmts = kcalloc(*num_input_fmts, | |
286 | sizeof(*input_fmts), | |
287 | GFP_KERNEL); | |
288 | if (!input_fmts) | |
289 | return NULL; | |
290 | ||
291 | input_fmts[0] = output_fmt; | |
292 | ||
293 | break; | |
294 | } | |
295 | } | |
296 | ||
297 | return input_fmts; | |
298 | } | |
299 | ||
300 | static int meson_encoder_hdmi_atomic_check(struct drm_bridge *bridge, | |
301 | struct drm_bridge_state *bridge_state, | |
302 | struct drm_crtc_state *crtc_state, | |
303 | struct drm_connector_state *conn_state) | |
304 | { | |
305 | struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); | |
306 | struct drm_connector_state *old_conn_state = | |
307 | drm_atomic_get_old_connector_state(conn_state->state, conn_state->connector); | |
308 | struct meson_drm *priv = encoder_hdmi->priv; | |
309 | ||
310 | encoder_hdmi->output_bus_fmt = bridge_state->output_bus_cfg.format; | |
311 | ||
312 | dev_dbg(priv->dev, "output_bus_fmt %lx\n", encoder_hdmi->output_bus_fmt); | |
313 | ||
314 | if (!drm_connector_atomic_hdr_metadata_equal(old_conn_state, conn_state)) | |
315 | crtc_state->mode_changed = true; | |
316 | ||
317 | return 0; | |
318 | } | |
319 | ||
0af5e0b4 NA |
320 | static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge, |
321 | enum drm_connector_status status) | |
322 | { | |
323 | struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); | |
324 | struct edid *edid; | |
325 | ||
326 | if (!encoder_hdmi->cec_notifier) | |
327 | return; | |
328 | ||
329 | if (status == connector_status_connected) { | |
330 | edid = drm_bridge_get_edid(encoder_hdmi->next_bridge, encoder_hdmi->connector); | |
331 | if (!edid) | |
332 | return; | |
333 | ||
334 | cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid); | |
335 | } else | |
336 | cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier); | |
337 | } | |
338 | ||
e67f6037 NA |
339 | static const struct drm_bridge_funcs meson_encoder_hdmi_bridge_funcs = { |
340 | .attach = meson_encoder_hdmi_attach, | |
0af5e0b4 | 341 | .detach = meson_encoder_hdmi_detach, |
e67f6037 | 342 | .mode_valid = meson_encoder_hdmi_mode_valid, |
0af5e0b4 | 343 | .hpd_notify = meson_encoder_hdmi_hpd_notify, |
e67f6037 NA |
344 | .atomic_enable = meson_encoder_hdmi_atomic_enable, |
345 | .atomic_disable = meson_encoder_hdmi_atomic_disable, | |
346 | .atomic_get_input_bus_fmts = meson_encoder_hdmi_get_inp_bus_fmts, | |
347 | .atomic_check = meson_encoder_hdmi_atomic_check, | |
348 | .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, | |
349 | .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, | |
350 | .atomic_reset = drm_atomic_helper_bridge_reset, | |
351 | }; | |
352 | ||
353 | int meson_encoder_hdmi_init(struct meson_drm *priv) | |
354 | { | |
355 | struct meson_encoder_hdmi *meson_encoder_hdmi; | |
0af5e0b4 | 356 | struct platform_device *pdev; |
e67f6037 NA |
357 | struct device_node *remote; |
358 | int ret; | |
359 | ||
360 | meson_encoder_hdmi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_hdmi), GFP_KERNEL); | |
361 | if (!meson_encoder_hdmi) | |
362 | return -ENOMEM; | |
363 | ||
364 | /* HDMI Transceiver Bridge */ | |
365 | remote = of_graph_get_remote_node(priv->dev->of_node, 1, 0); | |
366 | if (!remote) { | |
367 | dev_err(priv->dev, "HDMI transceiver device is disabled"); | |
368 | return 0; | |
369 | } | |
370 | ||
371 | meson_encoder_hdmi->next_bridge = of_drm_find_bridge(remote); | |
372 | if (!meson_encoder_hdmi->next_bridge) { | |
373 | dev_err(priv->dev, "Failed to find HDMI transceiver bridge\n"); | |
374 | return -EPROBE_DEFER; | |
375 | } | |
376 | ||
377 | /* HDMI Encoder Bridge */ | |
378 | meson_encoder_hdmi->bridge.funcs = &meson_encoder_hdmi_bridge_funcs; | |
379 | meson_encoder_hdmi->bridge.of_node = priv->dev->of_node; | |
380 | meson_encoder_hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA; | |
0af5e0b4 | 381 | meson_encoder_hdmi->bridge.interlace_allowed = true; |
e67f6037 NA |
382 | |
383 | drm_bridge_add(&meson_encoder_hdmi->bridge); | |
384 | ||
385 | meson_encoder_hdmi->priv = priv; | |
386 | ||
387 | /* Encoder */ | |
388 | ret = drm_simple_encoder_init(priv->drm, &meson_encoder_hdmi->encoder, | |
389 | DRM_MODE_ENCODER_TMDS); | |
390 | if (ret) { | |
391 | dev_err(priv->dev, "Failed to init HDMI encoder: %d\n", ret); | |
392 | return ret; | |
393 | } | |
394 | ||
395 | meson_encoder_hdmi->encoder.possible_crtcs = BIT(0); | |
396 | ||
397 | /* Attach HDMI Encoder Bridge to Encoder */ | |
0af5e0b4 NA |
398 | ret = drm_bridge_attach(&meson_encoder_hdmi->encoder, &meson_encoder_hdmi->bridge, NULL, |
399 | DRM_BRIDGE_ATTACH_NO_CONNECTOR); | |
e67f6037 NA |
400 | if (ret) { |
401 | dev_err(priv->dev, "Failed to attach bridge: %d\n", ret); | |
402 | return ret; | |
403 | } | |
404 | ||
0af5e0b4 NA |
405 | /* Initialize & attach Bridge Connector */ |
406 | meson_encoder_hdmi->connector = drm_bridge_connector_init(priv->drm, | |
407 | &meson_encoder_hdmi->encoder); | |
408 | if (IS_ERR(meson_encoder_hdmi->connector)) { | |
409 | dev_err(priv->dev, "Unable to create HDMI bridge connector\n"); | |
410 | return PTR_ERR(meson_encoder_hdmi->connector); | |
411 | } | |
412 | drm_connector_attach_encoder(meson_encoder_hdmi->connector, | |
413 | &meson_encoder_hdmi->encoder); | |
414 | ||
e67f6037 NA |
415 | /* |
416 | * We should have now in place: | |
0af5e0b4 | 417 | * encoder->[hdmi encoder bridge]->[dw-hdmi bridge]->[display connector bridge]->[display connector] |
e67f6037 NA |
418 | */ |
419 | ||
0af5e0b4 NA |
420 | /* |
421 | * drm_connector_attach_max_bpc_property() requires the | |
422 | * connector to have a state. | |
423 | */ | |
424 | drm_atomic_helper_connector_reset(meson_encoder_hdmi->connector); | |
425 | ||
426 | if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL) || | |
427 | meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) || | |
428 | meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) | |
429 | drm_connector_attach_hdr_output_metadata_property(meson_encoder_hdmi->connector); | |
430 | ||
431 | drm_connector_attach_max_bpc_property(meson_encoder_hdmi->connector, 8, 8); | |
432 | ||
433 | /* Handle this here until handled by drm_bridge_connector_init() */ | |
434 | meson_encoder_hdmi->connector->ycbcr_420_allowed = true; | |
435 | ||
436 | pdev = of_find_device_by_node(remote); | |
437 | if (pdev) { | |
438 | struct cec_connector_info conn_info; | |
439 | struct cec_notifier *notifier; | |
440 | ||
441 | cec_fill_conn_info_from_drm(&conn_info, meson_encoder_hdmi->connector); | |
442 | ||
443 | notifier = cec_notifier_conn_register(&pdev->dev, NULL, &conn_info); | |
73810768 ML |
444 | if (!notifier) { |
445 | put_device(&pdev->dev); | |
0af5e0b4 | 446 | return -ENOMEM; |
73810768 | 447 | } |
0af5e0b4 NA |
448 | |
449 | meson_encoder_hdmi->cec_notifier = notifier; | |
450 | } | |
451 | ||
e67f6037 NA |
452 | dev_dbg(priv->dev, "HDMI encoder initialized\n"); |
453 | ||
454 | return 0; | |
455 | } |