1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Maxime Ripard <maxime.ripard@free-electrons.com>
41 	container_of_const(c, struct sun4i_hdmi, connector)
43 static int sun4i_hdmi_write_infoframe(struct drm_connector *connector,  in sun4i_hdmi_write_infoframe()  argument
47 	struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);  in sun4i_hdmi_write_infoframe()  local
51 		drm_err(connector->dev,  in sun4i_hdmi_write_infoframe()
57 		writeb(buffer[i], hdmi->base + SUN4I_HDMI_AVI_INFOFRAME_REG(i));  in sun4i_hdmi_write_infoframe()
66 	struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);  in sun4i_hdmi_disable()  local
69 	DRM_DEBUG_DRIVER("Disabling the HDMI Output\n");  in sun4i_hdmi_disable()
71 	val = readl(hdmi->base + SUN4I_HDMI_VID_CTRL_REG);  in sun4i_hdmi_disable()
73 	writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);  in sun4i_hdmi_disable()
75 	clk_disable_unprepare(hdmi->tmds_clk);  in sun4i_hdmi_disable()
81 	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;  in sun4i_hdmi_enable()
82 	struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);  in sun4i_hdmi_enable()  local
83 	struct drm_connector *connector = &hdmi->connector;  in sun4i_hdmi_enable()  local
84 	struct drm_display_info *display = &connector->display_info;  in sun4i_hdmi_enable()
86 		drm_atomic_get_new_connector_state(state, connector);  in sun4i_hdmi_enable()
87 	unsigned long long tmds_rate = conn_state->hdmi.tmds_char_rate;  in sun4i_hdmi_enable()
91 	DRM_DEBUG_DRIVER("Enabling the HDMI Output\n");  in sun4i_hdmi_enable()
93 	clk_set_rate(hdmi->mod_clk, tmds_rate);  in sun4i_hdmi_enable()
94 	clk_set_rate(hdmi->tmds_clk, tmds_rate);  in sun4i_hdmi_enable()
98 	       hdmi->base + SUN4I_HDMI_UNKNOWN_REG);  in sun4i_hdmi_enable()
110 	val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);  in sun4i_hdmi_enable()
112 	val |= hdmi->variant->pad_ctrl1_init_val;  in sun4i_hdmi_enable()
113 	writel(val, hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);  in sun4i_hdmi_enable()
114 	val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);  in sun4i_hdmi_enable()
117 	writel(SUN4I_HDMI_VID_TIMING_X(mode->hdisplay) |  in sun4i_hdmi_enable()
118 	       SUN4I_HDMI_VID_TIMING_Y(mode->vdisplay),  in sun4i_hdmi_enable()
119 	       hdmi->base + SUN4I_HDMI_VID_TIMING_ACT_REG);  in sun4i_hdmi_enable()
121 	x = mode->htotal - mode->hsync_start;  in sun4i_hdmi_enable()
122 	y = mode->vtotal - mode->vsync_start;  in sun4i_hdmi_enable()
124 	       hdmi->base + SUN4I_HDMI_VID_TIMING_BP_REG);  in sun4i_hdmi_enable()
126 	x = mode->hsync_start - mode->hdisplay;  in sun4i_hdmi_enable()
127 	y = mode->vsync_start - mode->vdisplay;  in sun4i_hdmi_enable()
129 	       hdmi->base + SUN4I_HDMI_VID_TIMING_FP_REG);  in sun4i_hdmi_enable()
131 	x = mode->hsync_end - mode->hsync_start;  in sun4i_hdmi_enable()
132 	y = mode->vsync_end - mode->vsync_start;  in sun4i_hdmi_enable()
134 	       hdmi->base + SUN4I_HDMI_VID_TIMING_SPW_REG);  in sun4i_hdmi_enable()
137 	if (mode->flags & DRM_MODE_FLAG_PHSYNC)  in sun4i_hdmi_enable()
140 	if (mode->flags & DRM_MODE_FLAG_PVSYNC)  in sun4i_hdmi_enable()
143 	writel(val, hdmi->base + SUN4I_HDMI_VID_TIMING_POL_REG);  in sun4i_hdmi_enable()
145 	clk_prepare_enable(hdmi->tmds_clk);  in sun4i_hdmi_enable()
147 	drm_atomic_helper_connector_hdmi_update_infoframes(connector, state);  in sun4i_hdmi_enable()
151 	writel(val, hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0));  in sun4i_hdmi_enable()
154 	if (display->is_hdmi)  in sun4i_hdmi_enable()
157 	writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);  in sun4i_hdmi_enable()
166 sun4i_hdmi_connector_clock_valid(const struct drm_connector *connector,  in sun4i_hdmi_connector_clock_valid()  argument
170 	const struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);  in sun4i_hdmi_connector_clock_valid()  local
171 	unsigned long diff = div_u64(clock, 200); /* +-0.5% allowed by HDMI spec */  in sun4i_hdmi_connector_clock_valid()
174 	if (mode->flags & DRM_MODE_FLAG_DBLCLK)  in sun4i_hdmi_connector_clock_valid()
177 	/* 165 MHz is the typical max pixelclock frequency for HDMI <= 1.2 */  in sun4i_hdmi_connector_clock_valid()
181 	rounded_rate = clk_round_rate(hdmi->tmds_clk, clock);  in sun4i_hdmi_connector_clock_valid()
183 	    max_t(unsigned long, rounded_rate, clock) -  in sun4i_hdmi_connector_clock_valid()
190 static int sun4i_hdmi_connector_atomic_check(struct drm_connector *connector,  in sun4i_hdmi_connector_atomic_check()  argument
194 		drm_atomic_get_new_connector_state(state, connector);  in sun4i_hdmi_connector_atomic_check()
195 	struct drm_crtc *crtc = conn_state->crtc;  in sun4i_hdmi_connector_atomic_check()
196 	struct drm_crtc_state *crtc_state = crtc->state;  in sun4i_hdmi_connector_atomic_check()
197 	struct drm_display_mode *mode = &crtc_state->adjusted_mode;  in sun4i_hdmi_connector_atomic_check()
200 	status = sun4i_hdmi_connector_clock_valid(connector, mode,  in sun4i_hdmi_connector_atomic_check()
201 						  conn_state->hdmi.tmds_char_rate);  in sun4i_hdmi_connector_atomic_check()
203 		return -EINVAL;  in sun4i_hdmi_connector_atomic_check()
209 sun4i_hdmi_connector_mode_valid(struct drm_connector *connector,  in sun4i_hdmi_connector_mode_valid()  argument
215 	return sun4i_hdmi_connector_clock_valid(connector, mode, rate);  in sun4i_hdmi_connector_mode_valid()
218 static int sun4i_hdmi_get_modes(struct drm_connector *connector)  in sun4i_hdmi_get_modes()  argument
220 	struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);  in sun4i_hdmi_get_modes()  local
224 	drm_edid = drm_edid_read_ddc(connector, hdmi->ddc_i2c ?: hdmi->i2c);  in sun4i_hdmi_get_modes()
226 	drm_edid_connector_update(connector, drm_edid);  in sun4i_hdmi_get_modes()
227 	cec_s_phys_addr(hdmi->cec_adap,  in sun4i_hdmi_get_modes()
228 			connector->display_info.source_physical_address, false);  in sun4i_hdmi_get_modes()
234 			 connector->display_info.is_hdmi ? "an HDMI" : "a DVI");  in sun4i_hdmi_get_modes()
237 	ret = drm_edid_connector_add_modes(connector);  in sun4i_hdmi_get_modes()
248 	remote = of_graph_get_remote_node(dev->of_node, 1, -1);  in sun4i_hdmi_get_ddc()
250 		return ERR_PTR(-EINVAL);  in sun4i_hdmi_get_ddc()
252 	phandle = of_parse_phandle(remote, "ddc-i2c-bus", 0);  in sun4i_hdmi_get_ddc()
255 		return ERR_PTR(-ENODEV);  in sun4i_hdmi_get_ddc()
260 		return ERR_PTR(-EPROBE_DEFER);  in sun4i_hdmi_get_ddc()
277 sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force)  in sun4i_hdmi_connector_detect()  argument
279 	struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);  in sun4i_hdmi_connector_detect()  local
282 	reg = readl(hdmi->base + SUN4I_HDMI_HPD_REG);  in sun4i_hdmi_connector_detect()
284 		cec_phys_addr_invalidate(hdmi->cec_adap);  in sun4i_hdmi_connector_detect()
291 static void sun4i_hdmi_connector_reset(struct drm_connector *connector)  in sun4i_hdmi_connector_reset()  argument
293 	drm_atomic_helper_connector_reset(connector);  in sun4i_hdmi_connector_reset()
294 	__drm_atomic_helper_connector_hdmi_reset(connector, connector->state);  in sun4i_hdmi_connector_reset()
308 	struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);  in sun4i_hdmi_cec_pin_read()  local
310 	return readl(hdmi->base + SUN4I_HDMI_CEC) & SUN4I_HDMI_CEC_RX;  in sun4i_hdmi_cec_pin_read()
315 	struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);  in sun4i_hdmi_cec_pin_low()  local
318 	writel(SUN4I_HDMI_CEC_ENABLE, hdmi->base + SUN4I_HDMI_CEC);  in sun4i_hdmi_cec_pin_low()
323 	struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);  in sun4i_hdmi_cec_pin_high()  local
329 	writel(0, hdmi->base + SUN4I_HDMI_CEC);  in sun4i_hdmi_cec_pin_high()
515 	struct sun4i_drv *drv = drm->dev_private;  in sun4i_hdmi_bind()
516 	struct sun4i_hdmi *hdmi;  in sun4i_hdmi_bind()  local
520 	hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);  in sun4i_hdmi_bind()
521 	if (!hdmi)  in sun4i_hdmi_bind()
522 		return -ENOMEM;  in sun4i_hdmi_bind()
523 	dev_set_drvdata(dev, hdmi);  in sun4i_hdmi_bind()
524 	hdmi->dev = dev;  in sun4i_hdmi_bind()
525 	hdmi->drv = drv;  in sun4i_hdmi_bind()
527 	hdmi->variant = of_device_get_match_data(dev);  in sun4i_hdmi_bind()
528 	if (!hdmi->variant)  in sun4i_hdmi_bind()
529 		return -EINVAL;  in sun4i_hdmi_bind()
531 	hdmi->base = devm_platform_ioremap_resource(pdev, 0);  in sun4i_hdmi_bind()
532 	if (IS_ERR(hdmi->base)) {  in sun4i_hdmi_bind()
533 		dev_err(dev, "Couldn't map the HDMI encoder registers\n");  in sun4i_hdmi_bind()
534 		return PTR_ERR(hdmi->base);  in sun4i_hdmi_bind()
537 	if (hdmi->variant->has_reset_control) {  in sun4i_hdmi_bind()
538 		hdmi->reset = devm_reset_control_get(dev, NULL);  in sun4i_hdmi_bind()
539 		if (IS_ERR(hdmi->reset)) {  in sun4i_hdmi_bind()
540 			dev_err(dev, "Couldn't get the HDMI reset control\n");  in sun4i_hdmi_bind()
541 			return PTR_ERR(hdmi->reset);  in sun4i_hdmi_bind()
544 		ret = reset_control_deassert(hdmi->reset);  in sun4i_hdmi_bind()
546 			dev_err(dev, "Couldn't deassert HDMI reset\n");  in sun4i_hdmi_bind()
551 	hdmi->bus_clk = devm_clk_get(dev, "ahb");  in sun4i_hdmi_bind()
552 	if (IS_ERR(hdmi->bus_clk)) {  in sun4i_hdmi_bind()
553 		dev_err(dev, "Couldn't get the HDMI bus clock\n");  in sun4i_hdmi_bind()
554 		ret = PTR_ERR(hdmi->bus_clk);  in sun4i_hdmi_bind()
557 	clk_prepare_enable(hdmi->bus_clk);  in sun4i_hdmi_bind()
559 	hdmi->mod_clk = devm_clk_get(dev, "mod");  in sun4i_hdmi_bind()
560 	if (IS_ERR(hdmi->mod_clk)) {  in sun4i_hdmi_bind()
561 		dev_err(dev, "Couldn't get the HDMI mod clock\n");  in sun4i_hdmi_bind()
562 		ret = PTR_ERR(hdmi->mod_clk);  in sun4i_hdmi_bind()
565 	clk_prepare_enable(hdmi->mod_clk);  in sun4i_hdmi_bind()
567 	hdmi->pll0_clk = devm_clk_get(dev, "pll-0");  in sun4i_hdmi_bind()
568 	if (IS_ERR(hdmi->pll0_clk)) {  in sun4i_hdmi_bind()
569 		dev_err(dev, "Couldn't get the HDMI PLL 0 clock\n");  in sun4i_hdmi_bind()
570 		ret = PTR_ERR(hdmi->pll0_clk);  in sun4i_hdmi_bind()
574 	hdmi->pll1_clk = devm_clk_get(dev, "pll-1");  in sun4i_hdmi_bind()
575 	if (IS_ERR(hdmi->pll1_clk)) {  in sun4i_hdmi_bind()
576 		dev_err(dev, "Couldn't get the HDMI PLL 1 clock\n");  in sun4i_hdmi_bind()
577 		ret = PTR_ERR(hdmi->pll1_clk);  in sun4i_hdmi_bind()
581 	hdmi->regmap = devm_regmap_init_mmio(dev, hdmi->base,  in sun4i_hdmi_bind()
583 	if (IS_ERR(hdmi->regmap)) {  in sun4i_hdmi_bind()
584 		dev_err(dev, "Couldn't create HDMI encoder regmap\n");  in sun4i_hdmi_bind()
585 		ret = PTR_ERR(hdmi->regmap);  in sun4i_hdmi_bind()
589 	ret = sun4i_tmds_create(hdmi);  in sun4i_hdmi_bind()
595 	if (hdmi->variant->has_ddc_parent_clk) {  in sun4i_hdmi_bind()
596 		hdmi->ddc_parent_clk = devm_clk_get(dev, "ddc");  in sun4i_hdmi_bind()
597 		if (IS_ERR(hdmi->ddc_parent_clk)) {  in sun4i_hdmi_bind()
598 			dev_err(dev, "Couldn't get the HDMI DDC clock\n");  in sun4i_hdmi_bind()
599 			ret = PTR_ERR(hdmi->ddc_parent_clk);  in sun4i_hdmi_bind()
603 		hdmi->ddc_parent_clk = hdmi->tmds_clk;  in sun4i_hdmi_bind()
606 	writel(SUN4I_HDMI_CTRL_ENABLE, hdmi->base + SUN4I_HDMI_CTRL_REG);  in sun4i_hdmi_bind()
608 	writel(hdmi->variant->pad_ctrl0_init_val,  in sun4i_hdmi_bind()
609 	       hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG);  in sun4i_hdmi_bind()
611 	reg = readl(hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);  in sun4i_hdmi_bind()
613 	reg |= hdmi->variant->pll_ctrl_init_val;  in sun4i_hdmi_bind()
614 	writel(reg, hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);  in sun4i_hdmi_bind()
616 	ret = sun4i_hdmi_i2c_create(dev, hdmi);  in sun4i_hdmi_bind()
618 		dev_err(dev, "Couldn't create the HDMI I2C adapter\n");  in sun4i_hdmi_bind()
622 	hdmi->ddc_i2c = sun4i_hdmi_get_ddc(dev);  in sun4i_hdmi_bind()
623 	if (IS_ERR(hdmi->ddc_i2c)) {  in sun4i_hdmi_bind()
624 		ret = PTR_ERR(hdmi->ddc_i2c);  in sun4i_hdmi_bind()
625 		if (ret == -ENODEV)  in sun4i_hdmi_bind()
626 			hdmi->ddc_i2c = NULL;  in sun4i_hdmi_bind()
631 	drm_encoder_helper_add(&hdmi->encoder,  in sun4i_hdmi_bind()
633 	ret = drm_simple_encoder_init(drm, &hdmi->encoder,  in sun4i_hdmi_bind()
636 		dev_err(dev, "Couldn't initialise the HDMI encoder\n");  in sun4i_hdmi_bind()
640 	hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,  in sun4i_hdmi_bind()
641 								  dev->of_node);  in sun4i_hdmi_bind()
642 	if (!hdmi->encoder.possible_crtcs) {  in sun4i_hdmi_bind()
643 		ret = -EPROBE_DEFER;  in sun4i_hdmi_bind()
648 	hdmi->cec_adap = cec_pin_allocate_adapter(&sun4i_hdmi_cec_pin_ops,  in sun4i_hdmi_bind()
649 		hdmi, "sun4i", CEC_CAP_DEFAULTS | CEC_CAP_CONNECTOR_INFO);  in sun4i_hdmi_bind()
650 	ret = PTR_ERR_OR_ZERO(hdmi->cec_adap);  in sun4i_hdmi_bind()
653 	writel(readl(hdmi->base + SUN4I_HDMI_CEC) & ~SUN4I_HDMI_CEC_TX,  in sun4i_hdmi_bind()
654 	       hdmi->base + SUN4I_HDMI_CEC);  in sun4i_hdmi_bind()
657 	drm_connector_helper_add(&hdmi->connector,  in sun4i_hdmi_bind()
659 	ret = drmm_connector_hdmi_init(drm, &hdmi->connector,  in sun4i_hdmi_bind()
665 				       "AW", "HDMI",  in sun4i_hdmi_bind()
669 				       hdmi->ddc_i2c,  in sun4i_hdmi_bind()
674 			"Couldn't initialise the HDMI connector\n");  in sun4i_hdmi_bind()
677 	cec_fill_conn_info_from_drm(&conn_info, &hdmi->connector);  in sun4i_hdmi_bind()
678 	cec_s_conn_info(hdmi->cec_adap, &conn_info);  in sun4i_hdmi_bind()
681 	hdmi->connector.polled = DRM_CONNECTOR_POLL_CONNECT |  in sun4i_hdmi_bind()
684 	ret = cec_register_adapter(hdmi->cec_adap, dev);  in sun4i_hdmi_bind()
687 	drm_connector_attach_encoder(&hdmi->connector, &hdmi->encoder);  in sun4i_hdmi_bind()
692 	cec_delete_adapter(hdmi->cec_adap);  in sun4i_hdmi_bind()
693 	drm_encoder_cleanup(&hdmi->encoder);  in sun4i_hdmi_bind()
695 	i2c_put_adapter(hdmi->ddc_i2c);  in sun4i_hdmi_bind()
697 	i2c_del_adapter(hdmi->i2c);  in sun4i_hdmi_bind()
699 	clk_disable_unprepare(hdmi->mod_clk);  in sun4i_hdmi_bind()
701 	clk_disable_unprepare(hdmi->bus_clk);  in sun4i_hdmi_bind()
703 	reset_control_assert(hdmi->reset);  in sun4i_hdmi_bind()
710 	struct sun4i_hdmi *hdmi = dev_get_drvdata(dev);  in sun4i_hdmi_unbind()  local
712 	cec_unregister_adapter(hdmi->cec_adap);  in sun4i_hdmi_unbind()
713 	i2c_del_adapter(hdmi->i2c);  in sun4i_hdmi_unbind()
714 	i2c_put_adapter(hdmi->ddc_i2c);  in sun4i_hdmi_unbind()
715 	clk_disable_unprepare(hdmi->mod_clk);  in sun4i_hdmi_unbind()
716 	clk_disable_unprepare(hdmi->bus_clk);  in sun4i_hdmi_unbind()
726 	return component_add(&pdev->dev, &sun4i_hdmi_ops);  in sun4i_hdmi_probe()
731 	component_del(&pdev->dev, &sun4i_hdmi_ops);  in sun4i_hdmi_remove()
735 	{ .compatible = "allwinner,sun4i-a10-hdmi", .data = &sun4i_variant, },
736 	{ .compatible = "allwinner,sun5i-a10s-hdmi", .data = &sun5i_variant, },
737 	{ .compatible = "allwinner,sun6i-a31-hdmi", .data = &sun6i_variant, },
746 		.name		= "sun4i-hdmi",
752 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
753 MODULE_DESCRIPTION("Allwinner A10 HDMI Driver");