1 // SPDX-License-Identifier: GPL-2.0-or-later
9  *		      Boris Brezillon <boris.brezillon@free-electrons.com>
12  * Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
16 #include <linux/i2c-mux.h>
18 #include <linux/media-bus-format.h>
31 #include <sound/hdmi-codec.h>
74 /* Audio  */
160 	(SII902X_TPI_MISC_INFOFRAME_END - SII902X_TPI_MISC_INFOFRAME_BASE)
167  * The maximum resolution supported by the HDMI bridge is 1080p@60Hz
177 	struct drm_bridge bridge;  member
185 	 * Mutex protects audio and video functions from interfering
193 	} audio;  member
201 	ret = __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,  in sii902x_read_unlocked()
217 	return __i2c_smbus_xfer(i2c->adapter, i2c->addr, i2c->flags,  in sii902x_write_unlocked()
236 static inline struct sii902x *bridge_to_sii902x(struct drm_bridge *bridge)  in bridge_to_sii902x()  argument
238 	return container_of(bridge, struct sii902x, bridge);  in bridge_to_sii902x()
248 	if (!sii902x->reset_gpio)  in sii902x_reset()
251 	gpiod_set_value_cansleep(sii902x->reset_gpio, 1);  in sii902x_reset()
253 	/* The datasheet says treset-min = 100us. Make it 150us to be sure. */  in sii902x_reset()
256 	gpiod_set_value_cansleep(sii902x->reset_gpio, 0);  in sii902x_reset()
263 	mutex_lock(&sii902x->mutex);  in sii902x_detect()
265 	regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);  in sii902x_detect()
267 	mutex_unlock(&sii902x->mutex);  in sii902x_detect()
295 	mutex_lock(&sii902x->mutex);  in sii902x_edid_read()
297 	drm_edid = drm_edid_read_ddc(connector, sii902x->i2cmux->adapter[0]);  in sii902x_edid_read()
299 	mutex_unlock(&sii902x->mutex);  in sii902x_edid_read()
324 static void sii902x_bridge_atomic_disable(struct drm_bridge *bridge,  in sii902x_bridge_atomic_disable()  argument
327 	struct sii902x *sii902x = bridge_to_sii902x(bridge);  in sii902x_bridge_atomic_disable()
329 	mutex_lock(&sii902x->mutex);  in sii902x_bridge_atomic_disable()
331 	regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,  in sii902x_bridge_atomic_disable()
335 	mutex_unlock(&sii902x->mutex);  in sii902x_bridge_atomic_disable()
338 static void sii902x_bridge_atomic_enable(struct drm_bridge *bridge,  in sii902x_bridge_atomic_enable()  argument
341 	struct sii902x *sii902x = bridge_to_sii902x(bridge);  in sii902x_bridge_atomic_enable()
345 	connector = drm_atomic_get_new_connector_for_encoder(state, bridge->encoder);  in sii902x_bridge_atomic_enable()
346 	if (connector && connector->display_info.is_hdmi)  in sii902x_bridge_atomic_enable()
349 	mutex_lock(&sii902x->mutex);  in sii902x_bridge_atomic_enable()
351 	regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,  in sii902x_bridge_atomic_enable()
353 	regmap_update_bits(sii902x->regmap, SII902X_PWR_STATE_CTRL,  in sii902x_bridge_atomic_enable()
356 	regmap_update_bits(sii902x->regmap, SII902X_SYS_CTRL_DATA,  in sii902x_bridge_atomic_enable()
359 	mutex_unlock(&sii902x->mutex);  in sii902x_bridge_atomic_enable()
362 static void sii902x_bridge_mode_set(struct drm_bridge *bridge,  in sii902x_bridge_mode_set()  argument
366 	struct sii902x *sii902x = bridge_to_sii902x(bridge);  in sii902x_bridge_mode_set()
367 	struct regmap *regmap = sii902x->regmap;  in sii902x_bridge_mode_set()
370 	u16 pixel_clock_10kHz = adj->clock / 10;  in sii902x_bridge_mode_set()
377 	buf[4] = adj->hdisplay;  in sii902x_bridge_mode_set()
378 	buf[5] = adj->hdisplay >> 8;  in sii902x_bridge_mode_set()
379 	buf[6] = adj->vdisplay;  in sii902x_bridge_mode_set()
380 	buf[7] = adj->vdisplay >> 8;  in sii902x_bridge_mode_set()
386 	mutex_lock(&sii902x->mutex);  in sii902x_bridge_mode_set()
393 						       &sii902x->connector, adj);  in sii902x_bridge_mode_set()
407 			  buf + HDMI_INFOFRAME_HEADER_SIZE - 1,  in sii902x_bridge_mode_set()
411 	mutex_unlock(&sii902x->mutex);  in sii902x_bridge_mode_set()
414 static int sii902x_bridge_attach(struct drm_bridge *bridge,  in sii902x_bridge_attach()  argument
418 	struct sii902x *sii902x = bridge_to_sii902x(bridge);  in sii902x_bridge_attach()
420 	struct drm_device *drm = bridge->dev;  in sii902x_bridge_attach()
424 		return drm_bridge_attach(encoder, sii902x->next_bridge,  in sii902x_bridge_attach()
425 					 bridge, flags);  in sii902x_bridge_attach()
427 	drm_connector_helper_add(&sii902x->connector,  in sii902x_bridge_attach()
431 		dev_err(&sii902x->i2c->dev,  in sii902x_bridge_attach()
433 		return -ENOTSUPP;  in sii902x_bridge_attach()
436 	ret = drm_connector_init(drm, &sii902x->connector,  in sii902x_bridge_attach()
442 	if (sii902x->i2c->irq > 0)  in sii902x_bridge_attach()
443 		sii902x->connector.polled = DRM_CONNECTOR_POLL_HPD;  in sii902x_bridge_attach()
445 		sii902x->connector.polled = DRM_CONNECTOR_POLL_CONNECT;  in sii902x_bridge_attach()
447 	ret = drm_display_info_set_bus_formats(&sii902x->connector.display_info,  in sii902x_bridge_attach()
452 	drm_connector_attach_encoder(&sii902x->connector, encoder);  in sii902x_bridge_attach()
458 sii902x_bridge_detect(struct drm_bridge *bridge, struct drm_connector *connector)  in sii902x_bridge_detect()  argument
460 	struct sii902x *sii902x = bridge_to_sii902x(bridge);  in sii902x_bridge_detect()
465 static const struct drm_edid *sii902x_bridge_edid_read(struct drm_bridge *bridge,  in sii902x_bridge_edid_read()  argument
468 	struct sii902x *sii902x = bridge_to_sii902x(bridge);  in sii902x_bridge_edid_read()
473 static u32 *sii902x_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,  in sii902x_bridge_atomic_get_input_bus_fmts()  argument
481 	struct sii902x *sii902x = bridge_to_sii902x(bridge);  in sii902x_bridge_atomic_get_input_bus_fmts()
490 	switch (sii902x->bus_width) {  in sii902x_bridge_atomic_get_input_bus_fmts()
509 static int sii902x_bridge_atomic_check(struct drm_bridge *bridge,  in sii902x_bridge_atomic_check()  argument
514 	if (crtc_state->mode.clock < SII902X_MIN_PIXEL_CLOCK_KHZ ||  in sii902x_bridge_atomic_check()
515 	    crtc_state->mode.clock > SII902X_MAX_PIXEL_CLOCK_KHZ)  in sii902x_bridge_atomic_check()
516 		return -EINVAL;  in sii902x_bridge_atomic_check()
522 	bridge_state->input_bus_cfg.flags = bridge->timings->input_bus_flags;  in sii902x_bridge_atomic_check()
528 sii902x_bridge_mode_valid(struct drm_bridge *bridge,  in sii902x_bridge_mode_valid()  argument
532 	if (mode->clock < SII902X_MIN_PIXEL_CLOCK_KHZ)  in sii902x_bridge_mode_valid()
535 	if (mode->clock > SII902X_MAX_PIXEL_CLOCK_KHZ)  in sii902x_bridge_mode_valid()
558 	struct device *dev = &sii902x->i2c->dev;  in sii902x_mute()
564 	return regmap_update_bits(sii902x->regmap,  in sii902x_mute()
580 		unsigned int d = abs(div - sii902x_mclk_div_table[i]);  in sii902x_select_mclk_div()
619 	u8 infoframe_buf[HDMI_INFOFRAME_SIZE(AUDIO)];  in sii902x_audio_hw_params()
623 	if (daifmt->bit_clk_provider || daifmt->frame_clk_provider) {  in sii902x_audio_hw_params()
626 		return -EINVAL;  in sii902x_audio_hw_params()
629 	switch (daifmt->fmt) {  in sii902x_audio_hw_params()
642 			daifmt->fmt);  in sii902x_audio_hw_params()
643 		return -EINVAL;  in sii902x_audio_hw_params()
646 	if (daifmt->bit_clk_inv)  in sii902x_audio_hw_params()
651 	if (daifmt->frame_clk_inv)  in sii902x_audio_hw_params()
656 	if (params->channels > 2)  in sii902x_audio_hw_params()
661 	switch (params->sample_width) {  in sii902x_audio_hw_params()
674 			params->sample_width);  in sii902x_audio_hw_params()
675 		return -EINVAL;  in sii902x_audio_hw_params()
679 		if (params->sample_rate == sii902x_sample_freq[i].freq) {  in sii902x_audio_hw_params()
685 	ret = clk_prepare_enable(sii902x->audio.mclk);  in sii902x_audio_hw_params()
691 	if (sii902x->audio.mclk) {  in sii902x_audio_hw_params()
692 		mclk_rate = clk_get_rate(sii902x->audio.mclk);  in sii902x_audio_hw_params()
694 					      params->sample_rate, mclk_rate);  in sii902x_audio_hw_params()
695 		if (mclk_rate != ret * params->sample_rate)  in sii902x_audio_hw_params()
697 				mclk_rate, ret, params->sample_rate);  in sii902x_audio_hw_params()
700 	mutex_lock(&sii902x->mutex);  in sii902x_audio_hw_params()
702 	ret = regmap_write(sii902x->regmap,  in sii902x_audio_hw_params()
708 	ret = regmap_write(sii902x->regmap, SII902X_TPI_I2S_INPUT_CONFIG_REG,  in sii902x_audio_hw_params()
713 	for (i = 0; i < ARRAY_SIZE(sii902x->audio.i2s_fifo_sequence) &&  in sii902x_audio_hw_params()
714 		    sii902x->audio.i2s_fifo_sequence[i]; i++)  in sii902x_audio_hw_params()
715 		regmap_write(sii902x->regmap,  in sii902x_audio_hw_params()
717 			     sii902x->audio.i2s_fifo_sequence[i]);  in sii902x_audio_hw_params()
719 	ret = regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE3_REG,  in sii902x_audio_hw_params()
724 	ret = regmap_bulk_write(sii902x->regmap, SII902X_TPI_I2S_STRM_HDR_BASE,  in sii902x_audio_hw_params()
725 				params->iec.status,  in sii902x_audio_hw_params()
727 				    sizeof(params->iec.status)));  in sii902x_audio_hw_params()
731 	ret = hdmi_audio_infoframe_pack(&params->cea, infoframe_buf,  in sii902x_audio_hw_params()
734 		dev_err(dev, "%s: Failed to pack audio infoframe: %d\n",  in sii902x_audio_hw_params()
739 	ret = regmap_bulk_write(sii902x->regmap,  in sii902x_audio_hw_params()
747 	ret = regmap_write(sii902x->regmap, SII902X_IND_SET_PAGE, 0x02);  in sii902x_audio_hw_params()
751 	ret = regmap_write(sii902x->regmap, SII902X_IND_OFFSET, 0x24);  in sii902x_audio_hw_params()
755 	ret = regmap_write(sii902x->regmap, SII902X_IND_VALUE, 0x02);  in sii902x_audio_hw_params()
759 	dev_dbg(dev, "%s: hdmi audio enabled\n", __func__);  in sii902x_audio_hw_params()
761 	mutex_unlock(&sii902x->mutex);  in sii902x_audio_hw_params()
764 		clk_disable_unprepare(sii902x->audio.mclk);  in sii902x_audio_hw_params()
765 		dev_err(dev, "%s: hdmi audio enable failed: %d\n", __func__,  in sii902x_audio_hw_params()
776 	mutex_lock(&sii902x->mutex);  in sii902x_audio_shutdown()
778 	regmap_write(sii902x->regmap, SII902X_TPI_AUDIO_CONFIG_BYTE2_REG,  in sii902x_audio_shutdown()
781 	mutex_unlock(&sii902x->mutex);  in sii902x_audio_shutdown()
783 	clk_disable_unprepare(sii902x->audio.mclk);  in sii902x_audio_shutdown()
791 	mutex_lock(&sii902x->mutex);  in sii902x_audio_mute()
795 	mutex_unlock(&sii902x->mutex);  in sii902x_audio_mute()
805 	mutex_lock(&sii902x->mutex);  in sii902x_audio_get_eld()
807 	memcpy(buf, sii902x->connector.eld,  in sii902x_audio_get_eld()
808 	       min(sizeof(sii902x->connector.eld), len));  in sii902x_audio_get_eld()
810 	mutex_unlock(&sii902x->mutex);  in sii902x_audio_get_eld()
833 	return -EINVAL;  in sii902x_audio_get_dai_id()
869 	if (!of_property_present(dev->of_node, "#sound-dai-cells")) {  in sii902x_audio_codec_init()
870 		dev_dbg(dev, "%s: No \"#sound-dai-cells\", no audio\n",  in sii902x_audio_codec_init()
875 	num_lanes = of_property_read_variable_u8_array(dev->of_node,  in sii902x_audio_codec_init()
876 						       "sil,i2s-data-lanes",  in sii902x_audio_codec_init()
880 	if (num_lanes == -EINVAL) {  in sii902x_audio_codec_init()
882 			"%s: No \"sil,i2s-data-lanes\", use default <0>\n",  in sii902x_audio_codec_init()
888 			"%s: Error getting \"sil,i2s-data-lanes\": %d\n",  in sii902x_audio_codec_init()
895 		sii902x->audio.i2s_fifo_sequence[i] |= audio_fifo_id[i] |  in sii902x_audio_codec_init()
898 	sii902x->audio.mclk = devm_clk_get_optional(dev, "mclk");  in sii902x_audio_codec_init()
899 	if (IS_ERR(sii902x->audio.mclk)) {  in sii902x_audio_codec_init()
900 		dev_err(dev, "%s: No clock (audio mclk) found: %ld\n",  in sii902x_audio_codec_init()
901 			__func__, PTR_ERR(sii902x->audio.mclk));  in sii902x_audio_codec_init()
902 		return PTR_ERR(sii902x->audio.mclk);  in sii902x_audio_codec_init()
905 	sii902x->audio.pdev = platform_device_register_data(  in sii902x_audio_codec_init()
909 	return PTR_ERR_OR_ZERO(sii902x->audio.pdev);  in sii902x_audio_codec_init()
935 	mutex_lock(&sii902x->mutex);  in sii902x_interrupt()
937 	regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);  in sii902x_interrupt()
938 	regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);  in sii902x_interrupt()
940 	mutex_unlock(&sii902x->mutex);  in sii902x_interrupt()
942 	if ((status & SII902X_HOTPLUG_EVENT) && sii902x->bridge.dev) {  in sii902x_interrupt()
943 		drm_helper_hpd_irq_event(sii902x->bridge.dev);  in sii902x_interrupt()
944 		drm_bridge_hpd_notify(&sii902x->bridge, (status & SII902X_PLUGGED_STATUS)  in sii902x_interrupt()
967 	struct device *dev = &sii902x->i2c->dev;  in sii902x_i2c_bypass_select()
972 	ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,  in sii902x_i2c_bypass_select()
981 		ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,  in sii902x_i2c_bypass_select()
990 		return -ETIMEDOUT;  in sii902x_i2c_bypass_select()
993 	return sii902x_write_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,  in sii902x_i2c_bypass_select()
1012 	struct device *dev = &sii902x->i2c->dev;  in sii902x_i2c_bypass_deselect()
1032 		ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,  in sii902x_i2c_bypass_deselect()
1034 		retries--;  in sii902x_i2c_bypass_deselect()
1041 	ret = sii902x_update_bits_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,  in sii902x_i2c_bypass_deselect()
1050 		ret = sii902x_read_unlocked(sii902x->i2c, SII902X_SYS_CTRL_DATA,  in sii902x_i2c_bypass_deselect()
1061 		return -ETIMEDOUT;  in sii902x_i2c_bypass_deselect()
1075 	struct device *dev = &sii902x->i2c->dev;  in sii902x_init()
1082 	ret = regmap_write(sii902x->regmap, SII902X_REG_TPI_RQB, 0x0);  in sii902x_init()
1086 	ret = regmap_bulk_read(sii902x->regmap, SII902X_REG_CHIPID(0),  in sii902x_init()
1096 		return -EINVAL;  in sii902x_init()
1100 	regmap_read(sii902x->regmap, SII902X_INT_STATUS, &status);  in sii902x_init()
1101 	regmap_write(sii902x->regmap, SII902X_INT_STATUS, status);  in sii902x_init()
1103 	if (sii902x->i2c->irq > 0) {  in sii902x_init()
1104 		regmap_write(sii902x->regmap, SII902X_INT_ENABLE,  in sii902x_init()
1107 		ret = devm_request_threaded_irq(dev, sii902x->i2c->irq, NULL,  in sii902x_init()
1119 	i2c_set_clientdata(sii902x->i2c, sii902x);  in sii902x_init()
1121 	sii902x->i2cmux = i2c_mux_alloc(sii902x->i2c->adapter, dev,  in sii902x_init()
1125 	if (!sii902x->i2cmux) {  in sii902x_init()
1126 		ret = -ENOMEM;  in sii902x_init()
1130 	sii902x->i2cmux->priv = sii902x;  in sii902x_init()
1131 	ret = i2c_mux_add_adapter(sii902x->i2cmux, 0, 0);  in sii902x_init()
1135 	sii902x->bridge.of_node = dev->of_node;  in sii902x_init()
1136 	sii902x->bridge.timings = &default_sii902x_timings;  in sii902x_init()
1137 	sii902x->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID;  in sii902x_init()
1138 	sii902x->bridge.type = DRM_MODE_CONNECTOR_HDMIA;  in sii902x_init()
1140 	if (sii902x->i2c->irq > 0)  in sii902x_init()
1141 		sii902x->bridge.ops |= DRM_BRIDGE_OP_HPD;  in sii902x_init()
1143 	drm_bridge_add(&sii902x->bridge);  in sii902x_init()
1148 	if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev))  in sii902x_init()
1149 		platform_device_unregister(sii902x->audio.pdev);  in sii902x_init()
1156 	struct device *dev = &client->dev;  in sii902x_probe()
1162 	ret = i2c_check_functionality(client->adapter,  in sii902x_probe()
1166 		return -EIO;  in sii902x_probe()
1169 	sii902x = devm_drm_bridge_alloc(dev, struct sii902x, bridge, &sii902x_bridge_funcs);  in sii902x_probe()
1173 	sii902x->i2c = client;  in sii902x_probe()
1174 	sii902x->regmap = devm_regmap_init_i2c(client, &sii902x_regmap_config);  in sii902x_probe()
1175 	if (IS_ERR(sii902x->regmap))  in sii902x_probe()
1176 		return PTR_ERR(sii902x->regmap);  in sii902x_probe()
1178 	sii902x->reset_gpio = devm_gpiod_get_optional(dev, "reset",  in sii902x_probe()
1180 	if (IS_ERR(sii902x->reset_gpio)) {  in sii902x_probe()
1182 			PTR_ERR(sii902x->reset_gpio));  in sii902x_probe()
1183 		return PTR_ERR(sii902x->reset_gpio);  in sii902x_probe()
1186 	sii902x->bus_width = 24;  in sii902x_probe()
1187 	endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1);  in sii902x_probe()
1189 		of_property_read_u32(endpoint, "bus-width", &sii902x->bus_width);  in sii902x_probe()
1191 	endpoint = of_graph_get_endpoint_by_regs(dev->of_node, 1, -1);  in sii902x_probe()
1198 			return -ENODEV;  in sii902x_probe()
1204 			return -ENODEV;  in sii902x_probe()
1207 		sii902x->next_bridge = of_drm_find_bridge(remote);  in sii902x_probe()
1209 		if (!sii902x->next_bridge)  in sii902x_probe()
1210 			return dev_err_probe(dev, -EPROBE_DEFER,  in sii902x_probe()
1211 					     "Failed to find remote bridge\n");  in sii902x_probe()
1214 	mutex_init(&sii902x->mutex);  in sii902x_probe()
1227 	drm_bridge_remove(&sii902x->bridge);  in sii902x_remove()
1228 	i2c_mux_del_adapters(sii902x->i2cmux);  in sii902x_remove()
1230 	if (!PTR_ERR_OR_ZERO(sii902x->audio.pdev))  in sii902x_remove()
1231 		platform_device_unregister(sii902x->audio.pdev);  in sii902x_remove()
1257 MODULE_AUTHOR("Boris Brezillon <boris.brezillon@free-electrons.com>");
1258 MODULE_DESCRIPTION("SII902x RGB -> HDMI bridges");