Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com --- drivers/video/display/chip-tfp410.c | 164 +++++++++++++++++++++++++++++++++++ include/video/omap-panel-tfp410.h | 4 + 2 files changed, 168 insertions(+) create mode 100644 drivers/video/display/chip-tfp410.c
diff --git a/drivers/video/display/chip-tfp410.c b/drivers/video/display/chip-tfp410.c new file mode 100644 index 0000000..2f8bdb6 --- /dev/null +++ b/drivers/video/display/chip-tfp410.c @@ -0,0 +1,164 @@ +/* + * TFP410 DPI-to-DVI bridge + * + * Copyright (C) 2012 Texas Instruments + * + * Contacts: 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/kernel.h> +#include <linux/module.h> +#include <linux/gpio.h> +#include <linux/platform_device.h> + +#include <video/display.h> +#include <video/omap-panel-tfp410.h> + +struct tfp410_data { + struct video_source *in; + + struct video_source out; + + int power_down_gpio; +}; + +#define to_tfp410(p) container_of(p, struct tfp410_data, out) + +static int tfp410_set_stream(struct video_source *src, + enum video_source_stream_state state) +{ + struct tfp410_data *data = to_tfp410(src); + struct video_source *in = data->in; + int r; + + r = in->common_ops->set_stream(in, state); + if (r) + return r; + + switch (state) { + case DISPLAY_ENTITY_STREAM_STOPPED: + printk("tfp410 set_stream: STOPPED\n"); + + gpio_set_value_cansleep(data->power_down_gpio, 0); + + break; + + case DISPLAY_ENTITY_STREAM_CONTINUOUS: + printk("tfp410 set_stream: CONTINUOUS\n"); + + gpio_set_value_cansleep(data->power_down_gpio, 1); + + break; + + default: + printk("tfp410 set_stream error\n"); + break; + } + + return 0; +} + +static int tfp410_set_vm(struct video_source *src, const struct videomode *vm) +{ + struct tfp410_data *data = to_tfp410(src); + struct video_source *in = data->in; + + printk("tfp410 set vm\n"); + + return in->ops.dpi->set_videomode(in, vm); +} + +static const struct common_video_source_ops tfp410_common_ops = { + .set_stream = tfp410_set_stream, +}; + +static const struct dvi_video_source_ops tfp410_dvi_ops = { + .set_videomode = tfp410_set_vm, +}; + +static void tfp410_release(struct video_source *src) +{ + printk("tfp410 entity release\n"); +} + +static int __devinit tfp410_probe(struct platform_device *pdev) +{ + const struct tfp410_platform_data *pdata = pdev->dev.platform_data; + struct tfp410_data *data; + int r; + + if (pdata == NULL) + return -ENODEV; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (data == NULL) + return -ENOMEM; + + data->power_down_gpio = pdata->power_down_gpio; + + r = devm_gpio_request_one(&pdev->dev, pdata->power_down_gpio, + GPIOF_OUT_INIT_LOW, "tfp410 pd"); + if (r) { + printk("failed to request pd gpio\n"); + return r; + } + + /* setup input */ + + data->in = video_source_find(pdata->video_source); + if (data->in == NULL) { + printk("failed to get video source\n"); + return -EINVAL; + } + + data->in->ops.dpi->set_data_lines(data->in, 24); + + /* setup output */ + + data->out.dev = &pdev->dev; + data->out.release = tfp410_release; + data->out.common_ops = &tfp410_common_ops; + data->out.ops.dvi = &tfp410_dvi_ops; + data->out.name = pdata->video_output; + + r = video_source_register(&data->out); + if (r < 0) { + printk("tfp410 entity register failed\n"); + video_source_put(data->in); + return r; + } + + platform_set_drvdata(pdev, data); + + return 0; +} + +static int tfp410_remove(struct platform_device *pdev) +{ + struct tfp410_data *data = platform_get_drvdata(pdev); + + video_source_unregister(&data->out); + + video_source_put(data->in); + + return 0; +} + +static struct platform_driver tfp410_driver = { + .probe = tfp410_probe, + .remove = 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 Bridge"); +MODULE_LICENSE("GPL"); diff --git a/include/video/omap-panel-tfp410.h b/include/video/omap-panel-tfp410.h index b5b05f4..18f2b46 100644 --- a/include/video/omap-panel-tfp410.h +++ b/include/video/omap-panel-tfp410.h @@ -30,6 +30,10 @@ struct omap_dss_device; */ struct tfp410_platform_data { const char *name; + + const char *video_source; + const char *video_output; + u16 i2c_bus_num; int power_down_gpio; };