static int tpd_probe(struct platform_device *pdev)
{
struct omap_dss_device *in, *dssdev;
struct panel_drv_data *ddata;
int r;
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
platform_set_drvdata(pdev, ddata);
if (dev_get_platdata(&pdev->dev)) {
r = tpd_probe_pdata(pdev);
if (r)
return r;
} else if (pdev->dev.of_node) {
r = tpd_probe_of(pdev);
if (r)
return r;
} else {
return -ENODEV;
}
/*
* initialize the SEL_HDMI_I2C2 line going to the demux. Configure the
* demux to select the I2C2 bus
*/
r = sel_hdmi_i2c2_init(&pdev->dev);
if (r)
return r;
config_demux(&pdev->dev, SEL_I2C2);
r = devm_gpio_request_one(&pdev->dev, ddata->ct_cp_hpd_gpio,
GPIOF_OUT_INIT_LOW, "hdmi_ct_cp_hpd");
if (r)
goto err_gpio;
if (gpio_is_valid(ddata->ls_oe_gpio)) {
r = devm_gpio_request_one(&pdev->dev, ddata->ls_oe_gpio,
GPIOF_OUT_INIT_LOW, "hdmi_ls_oe");
if (r)
goto err_gpio;
}
r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
GPIOF_DIR_IN, "hdmi_hpd");
if (r)
goto err_gpio;
/*
* we see some low voltage glitches on the HPD_B line before it
* stabalizes to around 5V. We see the effects of this glitch on the
* HPD_A side, and hence on the gpio on DRA7x. The glitch is quite short
* in duration, but it takes a while for the voltage to go down back to
* 0 volts, we set a debounce value of 1 millisecond to prevent this,
* the reason for the glitch not being taken care of by the TPD chip
* needs to be investigated
*/
r = gpio_set_debounce(ddata->hpd_gpio, HPD_DEBOUNCE_TIME);
if (r)
goto err_debounce;
dssdev = &ddata->dssdev;
dssdev->ops.hdmi = &tpd_hdmi_ops;
dssdev->dev = &pdev->dev;
dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
dssdev->output_type = OMAP_DISPLAY_TYPE_HDMI;
dssdev->owner = THIS_MODULE;
dssdev->port_num = 1;
in = ddata->in;
r = omapdss_register_output(dssdev);
if (r) {
dev_err(&pdev->dev, "Failed to register output\n");
goto err_reg;
}
return 0;
err_reg:
err_debounce:
err_gpio:
omap_dss_put_device(ddata->in);
return r;
}
static int tpd_probe(struct platform_device *pdev)
{
struct omap_dss_device *in, *dssdev;
struct panel_drv_data *ddata;
int r;
ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
if (!ddata)
return -ENOMEM;
platform_set_drvdata(pdev, ddata);
init_completion(&ddata->hpd_completion);
if (dev_get_platdata(&pdev->dev)) {
r = tpd_probe_pdata(pdev);
if (r)
return r;
} else if (pdev->dev.of_node) {
r = tpd_probe_of(pdev);
if (r)
return r;
} else {
return -ENODEV;
}
r = devm_gpio_request_one(&pdev->dev, ddata->ct_cp_hpd_gpio,
GPIOF_OUT_INIT_LOW, "hdmi_ct_cp_hpd");
if (r)
goto err_gpio;
if (gpio_is_valid(ddata->ls_oe_gpio)) {
r = devm_gpio_request_one(&pdev->dev, ddata->ls_oe_gpio,
GPIOF_OUT_INIT_LOW, "hdmi_ls_oe");
if (r)
goto err_gpio;
}
r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
GPIOF_DIR_IN, "hdmi_hpd");
if (r)
goto err_gpio;
r = devm_request_threaded_irq(&pdev->dev, gpio_to_irq(ddata->hpd_gpio),
NULL, tpd_hpd_irq_handler,
IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
IRQF_ONESHOT, "hpd", ddata);
if (r)
goto err_irq;
dssdev = &ddata->dssdev;
dssdev->ops.hdmi = &tpd_hdmi_ops;
dssdev->dev = &pdev->dev;
dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
dssdev->output_type = OMAP_DISPLAY_TYPE_HDMI;
dssdev->owner = THIS_MODULE;
in = ddata->in;
r = omapdss_register_output(dssdev);
if (r) {
dev_err(&pdev->dev, "Failed to register output\n");
goto err_reg;
}
return 0;
err_reg:
err_irq:
err_gpio:
omap_dss_put_device(ddata->in);
return r;
}
