Lines Matching +full:ddc +full:- +full:i2c +full:- +full:bus
1 // SPDX-License-Identifier: GPL-2.0-only
37 struct zx_vga_i2c *ddc; member
51 struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl; in zx_vga_encoder_enable()
54 regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask, in zx_vga_encoder_enable()
55 pwrctrl->mask); in zx_vga_encoder_enable()
57 vou_inf_enable(VOU_VGA, encoder->crtc); in zx_vga_encoder_enable()
63 struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl; in zx_vga_encoder_disable()
65 vou_inf_disable(VOU_VGA, encoder->crtc); in zx_vga_encoder_disable()
68 regmap_update_bits(pwrctrl->regmap, pwrctrl->reg, pwrctrl->mask, 0); in zx_vga_encoder_disable()
83 * Clear both detection bits to switch I2C bus from device in zx_vga_connector_get_modes()
86 zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, 0); in zx_vga_connector_get_modes()
88 edid = drm_get_edid(connector, &vga->ddc->adap); in zx_vga_connector_get_modes()
96 zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, in zx_vga_connector_get_modes()
98 vga->connected = false; in zx_vga_connector_get_modes()
106 zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, VGA_DETECT_SEL_HAS_DEVICE); in zx_vga_connector_get_modes()
132 return vga->connected ? connector_status_connected : in zx_vga_connector_detect()
147 struct drm_encoder *encoder = &vga->encoder; in zx_vga_register()
148 struct drm_connector *connector = &vga->connector; in zx_vga_register()
149 struct device *dev = vga->dev; in zx_vga_register()
152 encoder->possible_crtcs = VOU_CRTC_MASK; in zx_vga_register()
162 vga->connector.polled = DRM_CONNECTOR_POLL_HPD; in zx_vga_register()
167 &vga->ddc->adap); in zx_vga_register()
192 struct zx_vga_pwrctrl *pwrctrl = &vga->pwrctrl; in zx_vga_pwrctrl_init()
193 struct device *dev = vga->dev; in zx_vga_pwrctrl_init()
198 ret = of_parse_phandle_with_fixed_args(dev->of_node, in zx_vga_pwrctrl_init()
199 "zte,vga-power-control", 2, 0, &out_args); in zx_vga_pwrctrl_init()
209 pwrctrl->regmap = regmap; in zx_vga_pwrctrl_init()
210 pwrctrl->reg = out_args.args[0]; in zx_vga_pwrctrl_init()
211 pwrctrl->mask = out_args.args[1]; in zx_vga_pwrctrl_init()
220 int len = msg->len; in zx_vga_i2c_read()
221 u8 *buf = msg->buf; in zx_vga_i2c_read()
225 reinit_completion(&vga->complete); in zx_vga_i2c_read()
228 zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_COMBO, VGA_CMD_COMBO); in zx_vga_i2c_read()
229 zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_RW, 0); in zx_vga_i2c_read()
235 zx_writel_mask(vga->mmio + VGA_RXF_CTRL, VGA_RX_FIFO_CLEAR, in zx_vga_i2c_read()
239 zx_writel(vga->mmio + VGA_SUB_ADDR, offset); in zx_vga_i2c_read()
242 zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_TRANS, in zx_vga_i2c_read()
245 if (!wait_for_completion_timeout(&vga->complete, in zx_vga_i2c_read()
247 DRM_DEV_ERROR(vga->dev, "transfer timeout\n"); in zx_vga_i2c_read()
248 return -ETIMEDOUT; in zx_vga_i2c_read()
251 cnt = zx_readl(vga->mmio + VGA_RXF_STATUS); in zx_vga_i2c_read()
257 *buf++ = zx_readl(vga->mmio + VGA_DATA); in zx_vga_i2c_read()
259 len -= cnt; in zx_vga_i2c_read()
269 * The DDC I2C adapter is only for reading EDID data, so we assume in zx_vga_i2c_write()
272 if ((msg->len != 1) || ((msg->addr != DDC_ADDR))) in zx_vga_i2c_write()
273 return -EINVAL; in zx_vga_i2c_write()
276 zx_writel(vga->mmio + VGA_DEVICE_ADDR, msg->addr); in zx_vga_i2c_write()
285 struct zx_vga_i2c *ddc = vga->ddc; in zx_vga_i2c_xfer() local
289 mutex_lock(&ddc->lock); in zx_vga_i2c_xfer()
304 mutex_unlock(&ddc->lock); in zx_vga_i2c_xfer()
321 struct device *dev = vga->dev; in zx_vga_ddc_register()
323 struct zx_vga_i2c *ddc; in zx_vga_ddc_register() local
326 ddc = devm_kzalloc(dev, sizeof(*ddc), GFP_KERNEL); in zx_vga_ddc_register()
327 if (!ddc) in zx_vga_ddc_register()
328 return -ENOMEM; in zx_vga_ddc_register()
330 vga->ddc = ddc; in zx_vga_ddc_register()
331 mutex_init(&ddc->lock); in zx_vga_ddc_register()
333 adap = &ddc->adap; in zx_vga_ddc_register()
334 adap->owner = THIS_MODULE; in zx_vga_ddc_register()
335 adap->class = I2C_CLASS_DDC; in zx_vga_ddc_register()
336 adap->dev.parent = dev; in zx_vga_ddc_register()
337 adap->algo = &zx_vga_algorithm; in zx_vga_ddc_register()
338 snprintf(adap->name, sizeof(adap->name), "zx vga i2c"); in zx_vga_ddc_register()
342 DRM_DEV_ERROR(dev, "failed to add I2C adapter: %d\n", ret); in zx_vga_ddc_register()
355 drm_helper_hpd_irq_event(vga->connector.dev); in zx_vga_irq_thread()
365 status = zx_readl(vga->mmio + VGA_I2C_STATUS); in zx_vga_irq_handler()
368 zx_writel_mask(vga->mmio + VGA_I2C_STATUS, VGA_CLEAR_IRQ, in zx_vga_irq_handler()
373 * Since VGA_DETECT_SEL bits need to be reset for switching DDC in zx_vga_irq_handler()
374 * bus from device detection to EDID read, rather than setting in zx_vga_irq_handler()
378 vga->connected = true; in zx_vga_irq_handler()
383 zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, in zx_vga_irq_handler()
385 vga->connected = false; in zx_vga_irq_handler()
390 complete(&vga->complete); in zx_vga_irq_handler()
399 unsigned long ref = clk_get_rate(vga->i2c_wclk); in zx_vga_hw_init()
403 * Set up I2C fast speed divider per formula below to get 400kHz. in zx_vga_hw_init()
406 div = DIV_ROUND_UP(ref / 1000, 400 * 4) - 1; in zx_vga_hw_init()
407 zx_writel(vga->mmio + VGA_CLK_DIV_FS, div); in zx_vga_hw_init()
410 zx_writel(vga->mmio + VGA_AUTO_DETECT_PARA, 0x80); in zx_vga_hw_init()
411 zx_writel(vga->mmio + VGA_AUTO_DETECT_SEL, VGA_DETECT_SEL_NO_DEVICE); in zx_vga_hw_init()
414 * We need to poke monitor via DDC bus to get connection irq in zx_vga_hw_init()
417 zx_writel(vga->mmio + VGA_DEVICE_ADDR, DDC_ADDR); in zx_vga_hw_init()
418 zx_writel_mask(vga->mmio + VGA_CMD_CFG, VGA_CMD_TRANS, VGA_CMD_TRANS); in zx_vga_hw_init()
432 return -ENOMEM; in zx_vga_bind()
434 vga->dev = dev; in zx_vga_bind()
438 vga->mmio = devm_ioremap_resource(dev, res); in zx_vga_bind()
439 if (IS_ERR(vga->mmio)) in zx_vga_bind()
440 return PTR_ERR(vga->mmio); in zx_vga_bind()
446 vga->i2c_wclk = devm_clk_get(dev, "i2c_wclk"); in zx_vga_bind()
447 if (IS_ERR(vga->i2c_wclk)) { in zx_vga_bind()
448 ret = PTR_ERR(vga->i2c_wclk); in zx_vga_bind()
461 DRM_DEV_ERROR(dev, "failed to register ddc: %d\n", ret); in zx_vga_bind()
471 init_completion(&vga->complete); in zx_vga_bind()
481 ret = clk_prepare_enable(vga->i2c_wclk); in zx_vga_bind()
495 clk_disable_unprepare(vga->i2c_wclk); in zx_vga_unbind()
505 return component_add(&pdev->dev, &zx_vga_component_ops); in zx_vga_probe()
510 component_del(&pdev->dev, &zx_vga_component_ops); in zx_vga_remove()
515 { .compatible = "zte,zx296718-vga", },
524 .name = "zx-vga",