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 17 #include <media/cec-notifier.h> 18 19 #include <drm/drm_atomic_helper.h> 20 #include <drm/drm_bridge.h> 21 #include <drm/drm_bridge_connector.h> 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; 40 struct drm_connector *connector; 41 struct meson_drm *priv; 42 unsigned long output_bus_fmt; 43 struct cec_notifier *cec_notifier; 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 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 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; 221 } 222 223 /* VENC + VENC-DVI Mode setup */ 224 meson_venc_hdmi_mode_set(priv, vic, ycrcb_map, yuv420_mode, mode); 225 226 /* VCLK Set clock */ 227 meson_encoder_hdmi_set_vclk(encoder_hdmi, mode); 228 229 if (encoder_hdmi->output_bus_fmt == MEDIA_BUS_FMT_UYYVYY8_0_5X24) 230 /* Setup YUV420 to HDMI-TX, no 10bit diphering */ 231 writel_relaxed(2 | (2 << 2), 232 priv->io_base + _REG(VPU_HDMI_FMT_CTRL)); 233 else 234 /* Setup YUV444 to HDMI-TX, no 10bit diphering */ 235 writel_relaxed(0, priv->io_base + _REG(VPU_HDMI_FMT_CTRL)); 236 237 dev_dbg(priv->dev, "%s\n", priv->venc.hdmi_use_enci ? "VENCI" : "VENCP"); 238 239 if (priv->venc.hdmi_use_enci) 240 writel_relaxed(1, priv->io_base + _REG(ENCI_VIDEO_EN)); 241 else 242 writel_relaxed(1, priv->io_base + _REG(ENCP_VIDEO_EN)); 243 } 244 245 static void meson_encoder_hdmi_atomic_disable(struct drm_bridge *bridge, 246 struct drm_bridge_state *bridge_state) 247 { 248 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); 249 struct meson_drm *priv = encoder_hdmi->priv; 250 251 writel_bits_relaxed(0x3, 0, 252 priv->io_base + _REG(VPU_HDMI_SETTING)); 253 254 writel_relaxed(0, priv->io_base + _REG(ENCI_VIDEO_EN)); 255 writel_relaxed(0, priv->io_base + _REG(ENCP_VIDEO_EN)); 256 } 257 258 static const u32 meson_encoder_hdmi_out_bus_fmts[] = { 259 MEDIA_BUS_FMT_YUV8_1X24, 260 MEDIA_BUS_FMT_UYYVYY8_0_5X24, 261 }; 262 263 static u32 * 264 meson_encoder_hdmi_get_inp_bus_fmts(struct drm_bridge *bridge, 265 struct drm_bridge_state *bridge_state, 266 struct drm_crtc_state *crtc_state, 267 struct drm_connector_state *conn_state, 268 u32 output_fmt, 269 unsigned int *num_input_fmts) 270 { 271 u32 *input_fmts = NULL; 272 int i; 273 274 *num_input_fmts = 0; 275 276 for (i = 0 ; i < ARRAY_SIZE(meson_encoder_hdmi_out_bus_fmts) ; ++i) { 277 if (output_fmt == meson_encoder_hdmi_out_bus_fmts[i]) { 278 *num_input_fmts = 1; 279 input_fmts = kcalloc(*num_input_fmts, 280 sizeof(*input_fmts), 281 GFP_KERNEL); 282 if (!input_fmts) 283 return NULL; 284 285 input_fmts[0] = output_fmt; 286 287 break; 288 } 289 } 290 291 return input_fmts; 292 } 293 294 static int meson_encoder_hdmi_atomic_check(struct drm_bridge *bridge, 295 struct drm_bridge_state *bridge_state, 296 struct drm_crtc_state *crtc_state, 297 struct drm_connector_state *conn_state) 298 { 299 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); 300 struct drm_connector_state *old_conn_state = 301 drm_atomic_get_old_connector_state(conn_state->state, conn_state->connector); 302 struct meson_drm *priv = encoder_hdmi->priv; 303 304 encoder_hdmi->output_bus_fmt = bridge_state->output_bus_cfg.format; 305 306 dev_dbg(priv->dev, "output_bus_fmt %lx\n", encoder_hdmi->output_bus_fmt); 307 308 if (!drm_connector_atomic_hdr_metadata_equal(old_conn_state, conn_state)) 309 crtc_state->mode_changed = true; 310 311 return 0; 312 } 313 314 static void meson_encoder_hdmi_hpd_notify(struct drm_bridge *bridge, 315 enum drm_connector_status status) 316 { 317 struct meson_encoder_hdmi *encoder_hdmi = bridge_to_meson_encoder_hdmi(bridge); 318 struct edid *edid; 319 320 if (!encoder_hdmi->cec_notifier) 321 return; 322 323 if (status == connector_status_connected) { 324 edid = drm_bridge_get_edid(encoder_hdmi->next_bridge, encoder_hdmi->connector); 325 if (!edid) 326 return; 327 328 cec_notifier_set_phys_addr_from_edid(encoder_hdmi->cec_notifier, edid); 329 } else 330 cec_notifier_phys_addr_invalidate(encoder_hdmi->cec_notifier); 331 } 332 333 static const struct drm_bridge_funcs meson_encoder_hdmi_bridge_funcs = { 334 .attach = meson_encoder_hdmi_attach, 335 .detach = meson_encoder_hdmi_detach, 336 .mode_valid = meson_encoder_hdmi_mode_valid, 337 .hpd_notify = meson_encoder_hdmi_hpd_notify, 338 .atomic_enable = meson_encoder_hdmi_atomic_enable, 339 .atomic_disable = meson_encoder_hdmi_atomic_disable, 340 .atomic_get_input_bus_fmts = meson_encoder_hdmi_get_inp_bus_fmts, 341 .atomic_check = meson_encoder_hdmi_atomic_check, 342 .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state, 343 .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state, 344 .atomic_reset = drm_atomic_helper_bridge_reset, 345 }; 346 347 int meson_encoder_hdmi_init(struct meson_drm *priv) 348 { 349 struct meson_encoder_hdmi *meson_encoder_hdmi; 350 struct platform_device *pdev; 351 struct device_node *remote; 352 int ret; 353 354 meson_encoder_hdmi = devm_kzalloc(priv->dev, sizeof(*meson_encoder_hdmi), GFP_KERNEL); 355 if (!meson_encoder_hdmi) 356 return -ENOMEM; 357 358 /* HDMI Transceiver Bridge */ 359 remote = of_graph_get_remote_node(priv->dev->of_node, 1, 0); 360 if (!remote) { 361 dev_err(priv->dev, "HDMI transceiver device is disabled"); 362 return 0; 363 } 364 365 meson_encoder_hdmi->next_bridge = of_drm_find_bridge(remote); 366 if (!meson_encoder_hdmi->next_bridge) { 367 dev_err(priv->dev, "Failed to find HDMI transceiver bridge\n"); 368 return -EPROBE_DEFER; 369 } 370 371 /* HDMI Encoder Bridge */ 372 meson_encoder_hdmi->bridge.funcs = &meson_encoder_hdmi_bridge_funcs; 373 meson_encoder_hdmi->bridge.of_node = priv->dev->of_node; 374 meson_encoder_hdmi->bridge.type = DRM_MODE_CONNECTOR_HDMIA; 375 meson_encoder_hdmi->bridge.interlace_allowed = true; 376 377 drm_bridge_add(&meson_encoder_hdmi->bridge); 378 379 meson_encoder_hdmi->priv = priv; 380 381 /* Encoder */ 382 ret = drm_simple_encoder_init(priv->drm, &meson_encoder_hdmi->encoder, 383 DRM_MODE_ENCODER_TMDS); 384 if (ret) { 385 dev_err(priv->dev, "Failed to init HDMI encoder: %d\n", ret); 386 return ret; 387 } 388 389 meson_encoder_hdmi->encoder.possible_crtcs = BIT(0); 390 391 /* Attach HDMI Encoder Bridge to Encoder */ 392 ret = drm_bridge_attach(&meson_encoder_hdmi->encoder, &meson_encoder_hdmi->bridge, NULL, 393 DRM_BRIDGE_ATTACH_NO_CONNECTOR); 394 if (ret) { 395 dev_err(priv->dev, "Failed to attach bridge: %d\n", ret); 396 return ret; 397 } 398 399 /* Initialize & attach Bridge Connector */ 400 meson_encoder_hdmi->connector = drm_bridge_connector_init(priv->drm, 401 &meson_encoder_hdmi->encoder); 402 if (IS_ERR(meson_encoder_hdmi->connector)) { 403 dev_err(priv->dev, "Unable to create HDMI bridge connector\n"); 404 return PTR_ERR(meson_encoder_hdmi->connector); 405 } 406 drm_connector_attach_encoder(meson_encoder_hdmi->connector, 407 &meson_encoder_hdmi->encoder); 408 409 /* 410 * We should have now in place: 411 * encoder->[hdmi encoder bridge]->[dw-hdmi bridge]->[display connector bridge]->[display connector] 412 */ 413 414 /* 415 * drm_connector_attach_max_bpc_property() requires the 416 * connector to have a state. 417 */ 418 drm_atomic_helper_connector_reset(meson_encoder_hdmi->connector); 419 420 if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL) || 421 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) || 422 meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) 423 drm_connector_attach_hdr_output_metadata_property(meson_encoder_hdmi->connector); 424 425 drm_connector_attach_max_bpc_property(meson_encoder_hdmi->connector, 8, 8); 426 427 /* Handle this here until handled by drm_bridge_connector_init() */ 428 meson_encoder_hdmi->connector->ycbcr_420_allowed = true; 429 430 pdev = of_find_device_by_node(remote); 431 if (pdev) { 432 struct cec_connector_info conn_info; 433 struct cec_notifier *notifier; 434 435 cec_fill_conn_info_from_drm(&conn_info, meson_encoder_hdmi->connector); 436 437 notifier = cec_notifier_conn_register(&pdev->dev, NULL, &conn_info); 438 if (!notifier) 439 return -ENOMEM; 440 441 meson_encoder_hdmi->cec_notifier = notifier; 442 } 443 444 dev_dbg(priv->dev, "HDMI encoder initialized\n"); 445 446 return 0; 447 } 448