opa362 is amplifier for videoand can be connected to the tvout pads of the OMAP3. It has one gpio control for enable/disable of the output (high impedance).
Signed-off-by: H. Nikolaus Schaller <h...@goldelico.com> --- drivers/video/fbdev/omap2/displays-new/Kconfig | 6 + drivers/video/fbdev/omap2/displays-new/Makefile | 1 + .../fbdev/omap2/displays-new/amplifier-opa362.c | 347 +++++++++++++++++++++ 3 files changed, 354 insertions(+) create mode 100644 drivers/video/fbdev/omap2/displays-new/amplifier-opa362.c diff --git a/drivers/video/fbdev/omap2/displays-new/Kconfig b/drivers/video/fbdev/omap2/displays-new/Kconfig index e6cfc38..211b3ec 100644 --- a/drivers/video/fbdev/omap2/displays-new/Kconfig +++ b/drivers/video/fbdev/omap2/displays-new/Kconfig @@ -1,6 +1,12 @@ menu "OMAP Display Device Drivers (new device model)" depends on OMAP2_DSS +config DISPLAY_AMPLIFIER_OPA362 + tristate "external analog amplifier with output disable/high-Z (e.g. OPA362)" + help + Driver to enable an external analog TV amplifier (e.g. OPA362) + through a GPIO. + config DISPLAY_ENCODER_TFP410 tristate "TFP410 DPI to DVI Encoder" help diff --git a/drivers/video/fbdev/omap2/displays-new/Makefile b/drivers/video/fbdev/omap2/displays-new/Makefile index 0323a8a..b311542 100644 --- a/drivers/video/fbdev/omap2/displays-new/Makefile +++ b/drivers/video/fbdev/omap2/displays-new/Makefile @@ -1,3 +1,4 @@ +obj-$(CONFIG_DISPLAY_AMPLIFIER_OPA362) += amplifier-opa362.o obj-$(CONFIG_DISPLAY_ENCODER_TFP410) += encoder-tfp410.o obj-$(CONFIG_DISPLAY_ENCODER_TPD12S015) += encoder-tpd12s015.o obj-$(CONFIG_DISPLAY_CONNECTOR_DVI) += connector-dvi.o diff --git a/drivers/video/fbdev/omap2/displays-new/amplifier-opa362.c b/drivers/video/fbdev/omap2/displays-new/amplifier-opa362.c new file mode 100644 index 0000000..37b2443 --- /dev/null +++ b/drivers/video/fbdev/omap2/displays-new/amplifier-opa362.c @@ -0,0 +1,347 @@ +/* + * OPA362 analog video amplifier with output/power control + * + * Copyright (C) 2014 Golden Delicious Computers + * Author: H. Nikolaus Schaller <h...@goldelico.com> + * + * based on encoder-tfp410 + * + * Copyright (C) 2013 Texas Instruments + * Author: Tomi Valkeinen <tomi.valkei...@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 <linux/of_gpio.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 enable_gpio; + bool bypass; + bool acbias; + + struct omap_video_timings timings; +}; + +#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev) + +static int opa362_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; + + dev_dbg(dssdev->dev, "connect\n"); + + if (omapdss_device_is_connected(dssdev)) + return -EBUSY; + + r = in->ops.atv->connect(in, dssdev); + if (r) + return r; + + dst->src = dssdev; + dssdev->dst = dst; + + return 0; +} + +static void opa362_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; + + dev_dbg(dssdev->dev, "disconnect\n"); + + 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.atv->disconnect(in, &ddata->dssdev); +} + +static int opa362_enable(struct omap_dss_device *dssdev) +{ + struct panel_drv_data *ddata = to_panel_data(dssdev); + struct omap_dss_device *in = ddata->in; + int r; + + dev_dbg(dssdev->dev, "enable\n"); + + if (!omapdss_device_is_connected(dssdev)) + return -ENODEV; + + if (omapdss_device_is_enabled(dssdev)) + return 0; + + in->ops.atv->set_timings(in, &ddata->timings); + /* fixme: should we receive the invert from our consumer, i.e. the connector? */ + in->ops.atv->invert_vid_out_polarity(in, true); + + r = in->ops.atv->enable(in); + if (r) + return r; + + if (gpio_is_valid(ddata->enable_gpio)) + gpio_set_value_cansleep(ddata->enable_gpio, 1); + + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + + return 0; +} + +static void opa362_disable(struct omap_dss_device *dssdev) +{ + struct panel_drv_data *ddata = to_panel_data(dssdev); + struct omap_dss_device *in = ddata->in; + + dev_dbg(dssdev->dev, "disable\n"); + + if (!omapdss_device_is_enabled(dssdev)) + return; + + if (gpio_is_valid(ddata->enable_gpio)) + gpio_set_value_cansleep(ddata->enable_gpio, 0); + + in->ops.atv->disable(in); + + dssdev->state = OMAP_DSS_DISPLAY_DISABLED; +} + +static void opa362_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; + + dev_dbg(dssdev->dev, "set_timings\n"); + + ddata->timings = *timings; + dssdev->panel.timings = *timings; + + in->ops.atv->set_timings(in, timings); +} + +static void opa362_get_timings(struct omap_dss_device *dssdev, + struct omap_video_timings *timings) +{ + struct panel_drv_data *ddata = to_panel_data(dssdev); + + dev_dbg(dssdev->dev, "get_timings\n"); + + *timings = ddata->timings; +} + +static int opa362_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; + + dev_dbg(dssdev->dev, "check_timings\n"); + + return in->ops.atv->check_timings(in, timings); +} + +static void opa362_set_type(struct omap_dss_device *dssdev, + enum omap_dss_venc_type type) +{ + /* we can only drive a COMPOSITE output */ + WARN_ON(type != OMAP_DSS_VENC_TYPE_COMPOSITE); + +} + +static void opa362_invert_vid_out_polarity(struct omap_dss_device *dssdev, + bool invert_polarity) +{ + struct panel_drv_data *ddata = to_panel_data(dssdev); + struct omap_dss_device *in = ddata->in; + + /* OPA362 inverts the polarity */ + in->ops.atv->invert_vid_out_polarity(in, !invert_polarity); +} + +static const struct omapdss_atv_ops opa362_atv_ops = { + .connect = opa362_connect, + .disconnect = opa362_disconnect, + + .enable = opa362_enable, + .disable = opa362_disable, + + .check_timings = opa362_check_timings, + .set_timings = opa362_set_timings, + .get_timings = opa362_get_timings, + + .set_type = opa362_set_type, + .invert_vid_out_polarity = opa362_invert_vid_out_polarity, +}; + +static int opa362_probe_pdata(struct platform_device *pdev) +{ + struct panel_drv_data *ddata = platform_get_drvdata(pdev); + struct amplifier_opa362_platform_data *pdata; + struct omap_dss_device *dssdev, *in; + + pdata = dev_get_platdata(&pdev->dev); + + ddata->enable_gpio = pdata->enable_gpio; + ddata->bypass = pdata->bypass; + ddata->acbias = pdata->acbias; + + 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 opa362_probe_of(struct platform_device *pdev) +{ + struct panel_drv_data *ddata = platform_get_drvdata(pdev); + struct device_node *node = pdev->dev.of_node; + struct omap_dss_device *in; + int gpio; + + gpio = of_get_gpio(node, 0); + + if (gpio_is_valid(gpio) || gpio == -ENOENT) { + ddata->enable_gpio = gpio; + } else { + dev_err(&pdev->dev, "failed to parse enable gpio\n"); + return gpio; + } + + in = omapdss_of_find_source_for_first_ep(node); + if (IS_ERR(in)) { + dev_err(&pdev->dev, "failed to find video source\n"); + return PTR_ERR(in); + } + + ddata->in = in; + + return 0; +} + +static int opa362_probe(struct platform_device *pdev) +{ + struct panel_drv_data *ddata; + struct omap_dss_device *dssdev; + int r; + + dev_dbg(&pdev->dev, "probe\n"); + + 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 = opa362_probe_pdata(pdev); + if (r) + return r; + } else { + r = opa362_probe_of(pdev); + if (r) + return r; + } + + if (gpio_is_valid(ddata->enable_gpio)) { + r = devm_gpio_request_one(&pdev->dev, ddata->enable_gpio, + GPIOF_OUT_INIT_LOW, "opa362 enable"); + if (r) { + dev_err(&pdev->dev, "Failed to request enable GPIO %d\n", + ddata->enable_gpio); + goto err_gpio; + } + } + + dssdev = &ddata->dssdev; + dssdev->ops.atv = &opa362_atv_ops; + dssdev->dev = &pdev->dev; + dssdev->type = OMAP_DISPLAY_TYPE_VENC; + dssdev->output_type = OMAP_DISPLAY_TYPE_VENC; + dssdev->owner = THIS_MODULE; + + 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 opa362_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)) + opa362_disable(dssdev); + + WARN_ON(omapdss_device_is_connected(dssdev)); + if (omapdss_device_is_connected(dssdev)) + opa362_disconnect(dssdev, dssdev->dst); + + omap_dss_put_device(in); + + return 0; +} + +static const struct of_device_id opa362_of_match[] = { + { .compatible = "omapdss,ti,opa362", }, + {}, +}; +MODULE_DEVICE_TABLE(of, opa362_of_match); + +static struct platform_driver opa362_driver = { + .probe = opa362_probe, + .remove = __exit_p(opa362_remove), + .driver = { + .name = "amplifier-opa362", + .owner = THIS_MODULE, + .of_match_table = opa362_of_match, + }, +}; + +module_platform_driver(opa362_driver); + +MODULE_AUTHOR("H. Nikolaus Schaller <h...@goldelico.com>"); +MODULE_DESCRIPTION("OPA362 analog video amplifier with output/power control"); +MODULE_LICENSE("GPL"); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html