/* * TFP410 DPI-to-DVI encoder driver * * Copyright (C) 2013 Texas Instruments * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 as published by * the Free Software Foundation. */ #include <linux/gpio.h> #include <linux/module.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <video/omapdss.h> #include <video/omap-panel-data.h> struct panel_drv_data { struct omap_dss_device dssdev; struct omap_dss_device *in; int pd_gpio; int data_lines; struct omap_video_timings timings; }; #define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev) static int tfp410_connect(struct omap_dss_device *dssdev, struct omap_dss_device *dst) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; int r; if (omapdss_device_is_connected(dssdev)) return -EBUSY; r = in->ops.dpi->connect(in, dssdev); if (r) return r; dst->src = dssdev; dssdev->dst = dst; return 0; } static void tfp410_disconnect(struct omap_dss_device *dssdev, struct omap_dss_device *dst) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; WARN_ON(!omapdss_device_is_connected(dssdev)); if (!omapdss_device_is_connected(dssdev)) return; WARN_ON(dst != dssdev->dst); if (dst != dssdev->dst) return; dst->src = NULL; dssdev->dst = NULL; in->ops.dpi->disconnect(in, &ddata->dssdev); } static int tfp410_enable(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; int r; if (!omapdss_device_is_connected(dssdev)) return -ENODEV; if (omapdss_device_is_enabled(dssdev)) return 0; in->ops.dpi->set_timings(in, &ddata->timings); in->ops.dpi->set_data_lines(in, ddata->data_lines); r = in->ops.dpi->enable(in); if (r) return r; if (gpio_is_valid(ddata->pd_gpio)) gpio_set_value_cansleep(ddata->pd_gpio, 1); dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; return 0; } static void tfp410_disable(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; if (!omapdss_device_is_enabled(dssdev)) return; if (gpio_is_valid(ddata->pd_gpio)) gpio_set_value_cansleep(ddata->pd_gpio, 0); in->ops.dpi->disable(in); dssdev->state = OMAP_DSS_DISPLAY_DISABLED; } static void tfp410_set_timings(struct omap_dss_device *dssdev, struct omap_video_timings *timings) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; ddata->timings = *timings; dssdev->panel.timings = *timings; in->ops.dpi->set_timings(in, timings); } static void tfp410_get_timings(struct omap_dss_device *dssdev, struct omap_video_timings *timings) { struct panel_drv_data *ddata = to_panel_data(dssdev); *timings = ddata->timings; } static int tfp410_check_timings(struct omap_dss_device *dssdev, struct omap_video_timings *timings) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; return in->ops.dpi->check_timings(in, timings); } static const struct omapdss_dvi_ops tfp410_dvi_ops = { .connect = tfp410_connect, .disconnect = tfp410_disconnect, .enable = tfp410_enable, .disable = tfp410_disable, .check_timings = tfp410_check_timings, .set_timings = tfp410_set_timings, .get_timings = tfp410_get_timings, }; static int tfp410_probe_pdata(struct platform_device *pdev) { struct panel_drv_data *ddata = platform_get_drvdata(pdev); struct encoder_tfp410_platform_data *pdata; struct omap_dss_device *dssdev, *in; pdata = dev_get_platdata(&pdev->dev); ddata->pd_gpio = pdata->power_down_gpio; ddata->data_lines = pdata->data_lines; in = omap_dss_find_output(pdata->source); if (in == NULL) { dev_err(&pdev->dev, "Failed to find video source\n"); return -ENODEV; } ddata->in = in; dssdev = &ddata->dssdev; dssdev->name = pdata->name; return 0; } static int tfp410_probe(struct platform_device *pdev) { struct panel_drv_data *ddata; struct omap_dss_device *dssdev; 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 = tfp410_probe_pdata(pdev); if (r) return r; } else { return -ENODEV; } if (gpio_is_valid(ddata->pd_gpio)) { r = devm_gpio_request_one(&pdev->dev, ddata->pd_gpio, GPIOF_OUT_INIT_LOW, "tfp410 PD"); if (r) { dev_err(&pdev->dev, "Failed to request PD GPIO %d\n", ddata->pd_gpio); goto err_gpio; } } dssdev = &ddata->dssdev; dssdev->ops.dvi = &tfp410_dvi_ops; dssdev->dev = &pdev->dev; dssdev->type = OMAP_DISPLAY_TYPE_DPI; dssdev->output_type = OMAP_DISPLAY_TYPE_DVI; dssdev->owner = THIS_MODULE; dssdev->phy.dpi.data_lines = ddata->data_lines; r = omapdss_register_output(dssdev); if (r) { dev_err(&pdev->dev, "Failed to register output\n"); goto err_reg; } return 0; err_reg: err_gpio: omap_dss_put_device(ddata->in); return r; } static int __exit tfp410_remove(struct platform_device *pdev) { struct panel_drv_data *ddata = platform_get_drvdata(pdev); struct omap_dss_device *dssdev = &ddata->dssdev; struct omap_dss_device *in = ddata->in; omapdss_unregister_output(&ddata->dssdev); WARN_ON(omapdss_device_is_enabled(dssdev)); if (omapdss_device_is_enabled(dssdev)) tfp410_disable(dssdev); WARN_ON(omapdss_device_is_connected(dssdev)); if (omapdss_device_is_connected(dssdev)) tfp410_disconnect(dssdev, dssdev->dst); omap_dss_put_device(in); return 0; } static struct platform_driver tfp410_driver = { .probe = tfp410_probe, .remove = __exit_p(tfp410_remove), .driver = { .name = "tfp410", .owner = THIS_MODULE, }, }; module_platform_driver(tfp410_driver); MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); MODULE_DESCRIPTION("TFP410 DPI to DVI encoder driver"); MODULE_LICENSE("GPL");