1 // SPDX-License-Identifier: GPL-2.0-only
36 	struct zx_vga_i2c *ddc;  member
50 	struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl;  in zx_vga_encoder_enable()
53 	regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask,  in zx_vga_encoder_enable()
54 			   pwrctrl->mask);  in zx_vga_encoder_enable()
56 	vou_inf_enable(VOU_VGA, encoder->crtc);  in zx_vga_encoder_enable()
62 	struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl;  in zx_vga_encoder_disable()
64 	vou_inf_disable(VOU_VGA, encoder->crtc);  in zx_vga_encoder_disable()
67 	regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask, 0);  in zx_vga_encoder_disable()
86 	 * Clear both detection bits to switch I2C bus from device  in zx_vga_connector_get_modes()
89 	zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, 0);  in zx_vga_connector_get_modes()
91 	edid = drm_get_edid(connector, &vga->ddc->adap);  in zx_vga_connector_get_modes()
99 		zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL,  in zx_vga_connector_get_modes()
101 		vga->connected = false;  in zx_vga_connector_get_modes()
109 	zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, VGA_DETECT_SEL_HAS_DEVICE);  in zx_vga_connector_get_modes()
135 	return vga->connected ? connector_status_connected :  in zx_vga_connector_detect()
150 	struct drm_encoder *encoder = &vga->encoder;  in zx_vga_register()
151 	struct drm_connector *connector = &vga->connector;  in zx_vga_register()
152 	struct device *dev = vga->dev;  in zx_vga_register()
155 	encoder->possible_crtcs = VOU_CRTC_MASK;  in zx_vga_register()
166 	vga->connector.polled = DRM_CONNECTOR_POLL_HPD;  in zx_vga_register()
194 	struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl;  in zx_vga_pwrctrl_init()
195 	struct device *dev = vga->dev;  in zx_vga_pwrctrl_init()
200 	ret = of_parse_phandle_with_fixed_args(dev->of_node,  in zx_vga_pwrctrl_init()
201 				"zte,vga-power-control", 2, 0, &out_args);  in zx_vga_pwrctrl_init()
211 	pwrctrl->regmap = regmap;  in zx_vga_pwrctrl_init()
212 	pwrctrl->reg = out_args.args[0];  in zx_vga_pwrctrl_init()
213 	pwrctrl->mask = out_args.args[1];  in zx_vga_pwrctrl_init()
222 	int len = msg->len;  in zx_vga_i2c_read()
223 	u8 *buf = msg->buf;  in zx_vga_i2c_read()
227 	reinit_completion(&vga->complete);  in zx_vga_i2c_read()
230 	zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_COMBO, VGA_CMD_COMBO);  in zx_vga_i2c_read()
231 	zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_RW, 0);  in zx_vga_i2c_read()
237 		zx_writel_mask(vga->mmio + VGA_RXF_CTRL, VGA_RX_FIFO_CLEAR,  in zx_vga_i2c_read()
241 		zx_writel(vga->mmio + VGA_SUB_ADDR, offset);  in zx_vga_i2c_read()
244 		zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_TRANS,  in zx_vga_i2c_read()
247 		if (!wait_for_completion_timeout(&vga->complete,  in zx_vga_i2c_read()
249 			DRM_DEV_ERROR(vga->dev, "transfer timeout\n");  in zx_vga_i2c_read()
250 			return -ETIMEDOUT;  in zx_vga_i2c_read()
253 		cnt = zx_readl(vga->mmio + VGA_RXF_STATUS);  in zx_vga_i2c_read()
259 			*buf++ = zx_readl(vga->mmio + VGA_DATA);  in zx_vga_i2c_read()
261 		len -= cnt;  in zx_vga_i2c_read()
271 	 * The DDC I2C adapter is only for reading EDID data, so we assume  in zx_vga_i2c_write()
274 	if ((msg->len != 1) || ((msg->addr != DDC_ADDR)))  in zx_vga_i2c_write()
275 		return -EINVAL;  in zx_vga_i2c_write()
278 	zx_writel(vga->mmio + VGA_DEVICE_ADDR, msg->addr);  in zx_vga_i2c_write()
287 	struct zx_vga_i2c *ddc = vga->ddc;  in zx_vga_i2c_xfer()  local
291 	mutex_lock(&ddc->lock);  in zx_vga_i2c_xfer()
306 	mutex_unlock(&ddc->lock);  in zx_vga_i2c_xfer()
323 	struct device *dev = vga->dev;  in zx_vga_ddc_register()
325 	struct zx_vga_i2c *ddc;  in zx_vga_ddc_register()  local
328 	ddc = devm_kzalloc(dev, sizeof(*ddc), GFP_KERNEL);  in zx_vga_ddc_register()
329 	if (!ddc)  in zx_vga_ddc_register()
330 		return -ENOMEM;  in zx_vga_ddc_register()
332 	vga->ddc = ddc;  in zx_vga_ddc_register()
333 	mutex_init(&ddc->lock);  in zx_vga_ddc_register()
335 	adap = &ddc->adap;  in zx_vga_ddc_register()
336 	adap->owner = THIS_MODULE;  in zx_vga_ddc_register()
337 	adap->class = I2C_CLASS_DDC;  in zx_vga_ddc_register()
338 	adap->dev.parent = dev;  in zx_vga_ddc_register()
339 	adap->algo = &zx_vga_algorithm;  in zx_vga_ddc_register()
340 	snprintf(adap->name, sizeof(adap->name), "zx vga i2c");  in zx_vga_ddc_register()
344 		DRM_DEV_ERROR(dev, "failed to add I2C adapter: %d\n", ret);  in zx_vga_ddc_register()
357 	drm_helper_hpd_irq_event(vga->connector.dev);  in zx_vga_irq_thread()
367 	status = zx_readl(vga->mmio + VGA_I2C_STATUS);  in zx_vga_irq_handler()
370 	zx_writel_mask(vga->mmio + VGA_I2C_STATUS, VGA_CLEAR_IRQ,  in zx_vga_irq_handler()
375 		 * Since VGA_DETECT_SEL bits need to be reset for switching DDC  in zx_vga_irq_handler()
376 		 * bus from device detection to EDID read, rather than setting  in zx_vga_irq_handler()
380 		vga->connected = true;  in zx_vga_irq_handler()
385 		zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL,  in zx_vga_irq_handler()
387 		vga->connected = false;  in zx_vga_irq_handler()
392 		complete(&vga->complete);  in zx_vga_irq_handler()
401 	unsigned long ref = clk_get_rate(vga->i2c_wclk);  in zx_vga_hw_init()
405 	 * Set up I2C fast speed divider per formula below to get 400kHz.  in zx_vga_hw_init()
408 	div = DIV_ROUND_UP(ref / 1000, 400 * 4) - 1;  in zx_vga_hw_init()
409 	zx_writel(vga->mmio + VGA_CLK_DIV_FS, div);  in zx_vga_hw_init()
412 	zx_writel(vga->mmio + VGA_AUTO_DETECT_PARA, 0x80);  in zx_vga_hw_init()
413 	zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, VGA_DETECT_SEL_NO_DEVICE);  in zx_vga_hw_init()
416 	 * We need to poke monitor via DDC bus to get connection irq  in zx_vga_hw_init()
419 	zx_writel(vga->mmio + VGA_DEVICE_ADDR, DDC_ADDR);  in zx_vga_hw_init()
420 	zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_TRANS, VGA_CMD_TRANS);  in zx_vga_hw_init()
434 		return -ENOMEM;  in zx_vga_bind()
436 	vga->dev = dev;  in zx_vga_bind()
440 	vga->mmio = devm_ioremap_resource(dev, res);  in zx_vga_bind()
441 	if (IS_ERR(vga->mmio))  in zx_vga_bind()
442 		return PTR_ERR(vga->mmio);  in zx_vga_bind()
448 	vga->i2c_wclk = devm_clk_get(dev, "i2c_wclk");  in zx_vga_bind()
449 	if (IS_ERR(vga->i2c_wclk)) {  in zx_vga_bind()
450 		ret = PTR_ERR(vga->i2c_wclk);  in zx_vga_bind()
463 		DRM_DEV_ERROR(dev, "failed to register ddc: %d\n", ret);  in zx_vga_bind()
473 	init_completion(&vga->complete);  in zx_vga_bind()
483 	ret = clk_prepare_enable(vga->i2c_wclk);  in zx_vga_bind()
497 	clk_disable_unprepare(vga->i2c_wclk);  in zx_vga_unbind()
507 	return component_add(&pdev->dev, &zx_vga_component_ops);  in zx_vga_probe()
512 	component_del(&pdev->dev, &zx_vga_component_ops);  in zx_vga_remove()
517 	{ .compatible = "zte,zx296718-vga", },
526 		.name = "zx-vga",