1 // SPDX-License-Identifier: GPL-2.0-or-later
5  * Maxime Ripard <maxime.ripard@free-electrons.com>
40 drm_connector_to_sun4i_hdmi(struct drm_connector *connector)  in drm_connector_to_sun4i_hdmi()  argument
42 	return container_of(connector, struct sun4i_hdmi,  in drm_connector_to_sun4i_hdmi()
43 			    connector);  in drm_connector_to_sun4i_hdmi()
46 static int sun4i_hdmi_setup_avi_infoframes(struct sun4i_hdmi *hdmi,  in sun4i_hdmi_setup_avi_infoframes()  argument
54 						       &hdmi->connector, mode);  in sun4i_hdmi_setup_avi_infoframes()
67 		writeb(buffer[i], hdmi->base + SUN4I_HDMI_AVI_INFOFRAME_REG(i));  in sun4i_hdmi_setup_avi_infoframes()
76 	struct drm_display_mode *mode = &crtc_state->mode;  in sun4i_hdmi_atomic_check()
78 	if (mode->flags & DRM_MODE_FLAG_DBLCLK)  in sun4i_hdmi_atomic_check()
79 		return -EINVAL;  in sun4i_hdmi_atomic_check()
86 	struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);  in sun4i_hdmi_disable()  local
89 	DRM_DEBUG_DRIVER("Disabling the HDMI Output\n");  in sun4i_hdmi_disable()
91 	val = readl(hdmi->base + SUN4I_HDMI_VID_CTRL_REG);  in sun4i_hdmi_disable()
93 	writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);  in sun4i_hdmi_disable()
95 	clk_disable_unprepare(hdmi->tmds_clk);  in sun4i_hdmi_disable()
100 	struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;  in sun4i_hdmi_enable()
101 	struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);  in sun4i_hdmi_enable()  local
104 	DRM_DEBUG_DRIVER("Enabling the HDMI Output\n");  in sun4i_hdmi_enable()
106 	clk_prepare_enable(hdmi->tmds_clk);  in sun4i_hdmi_enable()
108 	sun4i_hdmi_setup_avi_infoframes(hdmi, mode);  in sun4i_hdmi_enable()
111 	writel(val, hdmi->base + SUN4I_HDMI_PKT_CTRL_REG(0));  in sun4i_hdmi_enable()
114 	if (hdmi->hdmi_monitor)  in sun4i_hdmi_enable()
117 	writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);  in sun4i_hdmi_enable()
124 	struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);  in sun4i_hdmi_mode_set()  local
128 	clk_set_rate(hdmi->mod_clk, mode->crtc_clock * 1000);  in sun4i_hdmi_mode_set()
129 	clk_set_rate(hdmi->tmds_clk, mode->crtc_clock * 1000);  in sun4i_hdmi_mode_set()
133 	       hdmi->base + SUN4I_HDMI_UNKNOWN_REG);  in sun4i_hdmi_mode_set()
145 	val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);  in sun4i_hdmi_mode_set()
147 	val |= hdmi->variant->pad_ctrl1_init_val;  in sun4i_hdmi_mode_set()
148 	writel(val, hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);  in sun4i_hdmi_mode_set()
149 	val = readl(hdmi->base + SUN4I_HDMI_PAD_CTRL1_REG);  in sun4i_hdmi_mode_set()
152 	writel(SUN4I_HDMI_VID_TIMING_X(mode->hdisplay) |  in sun4i_hdmi_mode_set()
153 	       SUN4I_HDMI_VID_TIMING_Y(mode->vdisplay),  in sun4i_hdmi_mode_set()
154 	       hdmi->base + SUN4I_HDMI_VID_TIMING_ACT_REG);  in sun4i_hdmi_mode_set()
156 	x = mode->htotal - mode->hsync_start;  in sun4i_hdmi_mode_set()
157 	y = mode->vtotal - mode->vsync_start;  in sun4i_hdmi_mode_set()
159 	       hdmi->base + SUN4I_HDMI_VID_TIMING_BP_REG);  in sun4i_hdmi_mode_set()
161 	x = mode->hsync_start - mode->hdisplay;  in sun4i_hdmi_mode_set()
162 	y = mode->vsync_start - mode->vdisplay;  in sun4i_hdmi_mode_set()
164 	       hdmi->base + SUN4I_HDMI_VID_TIMING_FP_REG);  in sun4i_hdmi_mode_set()
166 	x = mode->hsync_end - mode->hsync_start;  in sun4i_hdmi_mode_set()
167 	y = mode->vsync_end - mode->vsync_start;  in sun4i_hdmi_mode_set()
169 	       hdmi->base + SUN4I_HDMI_VID_TIMING_SPW_REG);  in sun4i_hdmi_mode_set()
172 	if (mode->flags & DRM_MODE_FLAG_PHSYNC)  in sun4i_hdmi_mode_set()
175 	if (mode->flags & DRM_MODE_FLAG_PVSYNC)  in sun4i_hdmi_mode_set()
178 	writel(val, hdmi->base + SUN4I_HDMI_VID_TIMING_POL_REG);  in sun4i_hdmi_mode_set()
184 	struct sun4i_hdmi *hdmi = drm_encoder_to_sun4i_hdmi(encoder);  in sun4i_hdmi_mode_valid()  local
185 	unsigned long rate = mode->clock * 1000;  in sun4i_hdmi_mode_valid()
186 	unsigned long diff = rate / 200; /* +-0.5% allowed by HDMI spec */  in sun4i_hdmi_mode_valid()
189 	/* 165 MHz is the typical max pixelclock frequency for HDMI <= 1.2 */  in sun4i_hdmi_mode_valid()
192 	rounded_rate = clk_round_rate(hdmi->tmds_clk, rate);  in sun4i_hdmi_mode_valid()
194 	    max_t(unsigned long, rounded_rate, rate) -  in sun4i_hdmi_mode_valid()
208 static int sun4i_hdmi_get_modes(struct drm_connector *connector)  in sun4i_hdmi_get_modes()  argument
210 	struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);  in sun4i_hdmi_get_modes()  local
214 	edid = drm_get_edid(connector, hdmi->ddc_i2c ?: hdmi->i2c);  in sun4i_hdmi_get_modes()
218 	hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);  in sun4i_hdmi_get_modes()
220 			 hdmi->hdmi_monitor ? "an HDMI" : "a DVI");  in sun4i_hdmi_get_modes()
222 	drm_connector_update_edid_property(connector, edid);  in sun4i_hdmi_get_modes()
223 	cec_s_phys_addr_from_edid(hdmi->cec_adap, edid);  in sun4i_hdmi_get_modes()
224 	ret = drm_add_edid_modes(connector, edid);  in sun4i_hdmi_get_modes()
235 	remote = of_graph_get_remote_node(dev->of_node, 1, -1);  in sun4i_hdmi_get_ddc()
237 		return ERR_PTR(-EINVAL);  in sun4i_hdmi_get_ddc()
239 	phandle = of_parse_phandle(remote, "ddc-i2c-bus", 0);  in sun4i_hdmi_get_ddc()
242 		return ERR_PTR(-ENODEV);  in sun4i_hdmi_get_ddc()
247 		return ERR_PTR(-EPROBE_DEFER);  in sun4i_hdmi_get_ddc()
257 sun4i_hdmi_connector_detect(struct drm_connector *connector, bool force)  in sun4i_hdmi_connector_detect()  argument
259 	struct sun4i_hdmi *hdmi = drm_connector_to_sun4i_hdmi(connector);  in sun4i_hdmi_connector_detect()  local
262 	reg = readl(hdmi->base + SUN4I_HDMI_HPD_REG);  in sun4i_hdmi_connector_detect()
264 		cec_phys_addr_invalidate(hdmi->cec_adap);  in sun4i_hdmi_connector_detect()
283 	struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);  in sun4i_hdmi_cec_pin_read()  local
285 	return readl(hdmi->base + SUN4I_HDMI_CEC) & SUN4I_HDMI_CEC_RX;  in sun4i_hdmi_cec_pin_read()
290 	struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);  in sun4i_hdmi_cec_pin_low()  local
293 	writel(SUN4I_HDMI_CEC_ENABLE, hdmi->base + SUN4I_HDMI_CEC);  in sun4i_hdmi_cec_pin_low()
298 	struct sun4i_hdmi *hdmi = cec_get_drvdata(adap);  in sun4i_hdmi_cec_pin_high()  local
304 	writel(0, hdmi->base + SUN4I_HDMI_CEC);  in sun4i_hdmi_cec_pin_high()
490 	struct sun4i_drv *drv = drm->dev_private;  in sun4i_hdmi_bind()
491 	struct sun4i_hdmi *hdmi;  in sun4i_hdmi_bind()  local
496 	hdmi = devm_kzalloc(dev, sizeof(*hdmi), GFP_KERNEL);  in sun4i_hdmi_bind()
497 	if (!hdmi)  in sun4i_hdmi_bind()
498 		return -ENOMEM;  in sun4i_hdmi_bind()
499 	dev_set_drvdata(dev, hdmi);  in sun4i_hdmi_bind()
500 	hdmi->dev = dev;  in sun4i_hdmi_bind()
501 	hdmi->drv = drv;  in sun4i_hdmi_bind()
503 	hdmi->variant = of_device_get_match_data(dev);  in sun4i_hdmi_bind()
504 	if (!hdmi->variant)  in sun4i_hdmi_bind()
505 		return -EINVAL;  in sun4i_hdmi_bind()
508 	hdmi->base = devm_ioremap_resource(dev, res);  in sun4i_hdmi_bind()
509 	if (IS_ERR(hdmi->base)) {  in sun4i_hdmi_bind()
510 		dev_err(dev, "Couldn't map the HDMI encoder registers\n");  in sun4i_hdmi_bind()
511 		return PTR_ERR(hdmi->base);  in sun4i_hdmi_bind()
514 	if (hdmi->variant->has_reset_control) {  in sun4i_hdmi_bind()
515 		hdmi->reset = devm_reset_control_get(dev, NULL);  in sun4i_hdmi_bind()
516 		if (IS_ERR(hdmi->reset)) {  in sun4i_hdmi_bind()
517 			dev_err(dev, "Couldn't get the HDMI reset control\n");  in sun4i_hdmi_bind()
518 			return PTR_ERR(hdmi->reset);  in sun4i_hdmi_bind()
521 		ret = reset_control_deassert(hdmi->reset);  in sun4i_hdmi_bind()
523 			dev_err(dev, "Couldn't deassert HDMI reset\n");  in sun4i_hdmi_bind()
528 	hdmi->bus_clk = devm_clk_get(dev, "ahb");  in sun4i_hdmi_bind()
529 	if (IS_ERR(hdmi->bus_clk)) {  in sun4i_hdmi_bind()
530 		dev_err(dev, "Couldn't get the HDMI bus clock\n");  in sun4i_hdmi_bind()
531 		ret = PTR_ERR(hdmi->bus_clk);  in sun4i_hdmi_bind()
534 	clk_prepare_enable(hdmi->bus_clk);  in sun4i_hdmi_bind()
536 	hdmi->mod_clk = devm_clk_get(dev, "mod");  in sun4i_hdmi_bind()
537 	if (IS_ERR(hdmi->mod_clk)) {  in sun4i_hdmi_bind()
538 		dev_err(dev, "Couldn't get the HDMI mod clock\n");  in sun4i_hdmi_bind()
539 		ret = PTR_ERR(hdmi->mod_clk);  in sun4i_hdmi_bind()
542 	clk_prepare_enable(hdmi->mod_clk);  in sun4i_hdmi_bind()
544 	hdmi->pll0_clk = devm_clk_get(dev, "pll-0");  in sun4i_hdmi_bind()
545 	if (IS_ERR(hdmi->pll0_clk)) {  in sun4i_hdmi_bind()
546 		dev_err(dev, "Couldn't get the HDMI PLL 0 clock\n");  in sun4i_hdmi_bind()
547 		ret = PTR_ERR(hdmi->pll0_clk);  in sun4i_hdmi_bind()
551 	hdmi->pll1_clk = devm_clk_get(dev, "pll-1");  in sun4i_hdmi_bind()
552 	if (IS_ERR(hdmi->pll1_clk)) {  in sun4i_hdmi_bind()
553 		dev_err(dev, "Couldn't get the HDMI PLL 1 clock\n");  in sun4i_hdmi_bind()
554 		ret = PTR_ERR(hdmi->pll1_clk);  in sun4i_hdmi_bind()
558 	hdmi->regmap = devm_regmap_init_mmio(dev, hdmi->base,  in sun4i_hdmi_bind()
560 	if (IS_ERR(hdmi->regmap)) {  in sun4i_hdmi_bind()
561 		dev_err(dev, "Couldn't create HDMI encoder regmap\n");  in sun4i_hdmi_bind()
562 		ret = PTR_ERR(hdmi->regmap);  in sun4i_hdmi_bind()
566 	ret = sun4i_tmds_create(hdmi);  in sun4i_hdmi_bind()
572 	if (hdmi->variant->has_ddc_parent_clk) {  in sun4i_hdmi_bind()
573 		hdmi->ddc_parent_clk = devm_clk_get(dev, "ddc");  in sun4i_hdmi_bind()
574 		if (IS_ERR(hdmi->ddc_parent_clk)) {  in sun4i_hdmi_bind()
575 			dev_err(dev, "Couldn't get the HDMI DDC clock\n");  in sun4i_hdmi_bind()
576 			ret = PTR_ERR(hdmi->ddc_parent_clk);  in sun4i_hdmi_bind()
580 		hdmi->ddc_parent_clk = hdmi->tmds_clk;  in sun4i_hdmi_bind()
583 	writel(SUN4I_HDMI_CTRL_ENABLE, hdmi->base + SUN4I_HDMI_CTRL_REG);  in sun4i_hdmi_bind()
585 	writel(hdmi->variant->pad_ctrl0_init_val,  in sun4i_hdmi_bind()
586 	       hdmi->base + SUN4I_HDMI_PAD_CTRL0_REG);  in sun4i_hdmi_bind()
588 	reg = readl(hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);  in sun4i_hdmi_bind()
590 	reg |= hdmi->variant->pll_ctrl_init_val;  in sun4i_hdmi_bind()
591 	writel(reg, hdmi->base + SUN4I_HDMI_PLL_CTRL_REG);  in sun4i_hdmi_bind()
593 	ret = sun4i_hdmi_i2c_create(dev, hdmi);  in sun4i_hdmi_bind()
595 		dev_err(dev, "Couldn't create the HDMI I2C adapter\n");  in sun4i_hdmi_bind()
599 	hdmi->ddc_i2c = sun4i_hdmi_get_ddc(dev);  in sun4i_hdmi_bind()
600 	if (IS_ERR(hdmi->ddc_i2c)) {  in sun4i_hdmi_bind()
601 		ret = PTR_ERR(hdmi->ddc_i2c);  in sun4i_hdmi_bind()
602 		if (ret == -ENODEV)  in sun4i_hdmi_bind()
603 			hdmi->ddc_i2c = NULL;  in sun4i_hdmi_bind()
608 	drm_encoder_helper_add(&hdmi->encoder,  in sun4i_hdmi_bind()
610 	ret = drm_simple_encoder_init(drm, &hdmi->encoder,  in sun4i_hdmi_bind()
613 		dev_err(dev, "Couldn't initialise the HDMI encoder\n");  in sun4i_hdmi_bind()
617 	hdmi->encoder.possible_crtcs = drm_of_find_possible_crtcs(drm,  in sun4i_hdmi_bind()
618 								  dev->of_node);  in sun4i_hdmi_bind()
619 	if (!hdmi->encoder.possible_crtcs) {  in sun4i_hdmi_bind()
620 		ret = -EPROBE_DEFER;  in sun4i_hdmi_bind()
625 	hdmi->cec_adap = cec_pin_allocate_adapter(&sun4i_hdmi_cec_pin_ops,  in sun4i_hdmi_bind()
626 		hdmi, "sun4i", CEC_CAP_DEFAULTS | CEC_CAP_CONNECTOR_INFO);  in sun4i_hdmi_bind()
627 	ret = PTR_ERR_OR_ZERO(hdmi->cec_adap);  in sun4i_hdmi_bind()
630 	writel(readl(hdmi->base + SUN4I_HDMI_CEC) & ~SUN4I_HDMI_CEC_TX,  in sun4i_hdmi_bind()
631 	       hdmi->base + SUN4I_HDMI_CEC);  in sun4i_hdmi_bind()
634 	drm_connector_helper_add(&hdmi->connector,  in sun4i_hdmi_bind()
636 	ret = drm_connector_init_with_ddc(drm, &hdmi->connector,  in sun4i_hdmi_bind()
639 					  hdmi->ddc_i2c);  in sun4i_hdmi_bind()
642 			"Couldn't initialise the HDMI connector\n");  in sun4i_hdmi_bind()
645 	cec_fill_conn_info_from_drm(&conn_info, &hdmi->connector);  in sun4i_hdmi_bind()
646 	cec_s_conn_info(hdmi->cec_adap, &conn_info);  in sun4i_hdmi_bind()
649 	hdmi->connector.polled = DRM_CONNECTOR_POLL_CONNECT |  in sun4i_hdmi_bind()
652 	ret = cec_register_adapter(hdmi->cec_adap, dev);  in sun4i_hdmi_bind()
655 	drm_connector_attach_encoder(&hdmi->connector, &hdmi->encoder);  in sun4i_hdmi_bind()
660 	cec_delete_adapter(hdmi->cec_adap);  in sun4i_hdmi_bind()
661 	drm_encoder_cleanup(&hdmi->encoder);  in sun4i_hdmi_bind()
663 	i2c_put_adapter(hdmi->ddc_i2c);  in sun4i_hdmi_bind()
665 	i2c_del_adapter(hdmi->i2c);  in sun4i_hdmi_bind()
667 	clk_disable_unprepare(hdmi->mod_clk);  in sun4i_hdmi_bind()
669 	clk_disable_unprepare(hdmi->bus_clk);  in sun4i_hdmi_bind()
671 	reset_control_assert(hdmi->reset);  in sun4i_hdmi_bind()
678 	struct sun4i_hdmi *hdmi = dev_get_drvdata(dev);  in sun4i_hdmi_unbind()  local
680 	cec_unregister_adapter(hdmi->cec_adap);  in sun4i_hdmi_unbind()
681 	i2c_del_adapter(hdmi->i2c);  in sun4i_hdmi_unbind()
682 	i2c_put_adapter(hdmi->ddc_i2c);  in sun4i_hdmi_unbind()
683 	clk_disable_unprepare(hdmi->mod_clk);  in sun4i_hdmi_unbind()
684 	clk_disable_unprepare(hdmi->bus_clk);  in sun4i_hdmi_unbind()
694 	return component_add(&pdev->dev, &sun4i_hdmi_ops);  in sun4i_hdmi_probe()
699 	component_del(&pdev->dev, &sun4i_hdmi_ops);  in sun4i_hdmi_remove()
705 	{ .compatible = "allwinner,sun4i-a10-hdmi", .data = &sun4i_variant, },
706 	{ .compatible = "allwinner,sun5i-a10s-hdmi", .data = &sun5i_variant, },
707 	{ .compatible = "allwinner,sun6i-a31-hdmi", .data = &sun6i_variant, },
716 		.name		= "sun4i-hdmi",
722 MODULE_AUTHOR("Maxime Ripard <maxime.ripard@free-electrons.com>");
723 MODULE_DESCRIPTION("Allwinner A10 HDMI Driver");