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Release 4.11 drivers/gpu/drm/omapdrm/displays/encoder-opa362.c

/*
 * OPA362 analog video amplifier with output/power control
 *
 * Copyright (C) 2014 Golden Delicious Computers
 * Author: H. Nikolaus Schaller <hns@goldelico.com>
 *
 * based on encoder-tfp410
 *
 * 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/consumer.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include "../dss/omapdss.h"


struct panel_drv_data {
	
struct omap_dss_device dssdev;
	
struct omap_dss_device *in;

	
struct gpio_desc *enable_gpio;

	
struct videomode vm;
};


#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; }

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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); }

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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->vm); r = in->ops.atv->enable(in); if (r) return r; if (ddata->enable_gpio) gpiod_set_value_cansleep(ddata->enable_gpio, 1); dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; return 0; }

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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 (ddata->enable_gpio) gpiod_set_value_cansleep(ddata->enable_gpio, 0); in->ops.atv->disable(in); dssdev->state = OMAP_DSS_DISPLAY_DISABLED; }

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static void opa362_set_timings(struct omap_dss_device *dssdev, struct videomode *vm) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; dev_dbg(dssdev->dev, "set_timings\n"); ddata->vm = *vm; dssdev->panel.vm = *vm; in->ops.atv->set_timings(in, vm); }

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static void opa362_get_timings(struct omap_dss_device *dssdev, struct videomode *vm) { struct panel_drv_data *ddata = to_panel_data(dssdev); dev_dbg(dssdev->dev, "get_timings\n"); *vm = ddata->vm; }

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static int opa362_check_timings(struct omap_dss_device *dssdev, struct videomode *vm) { 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, vm); }

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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); }

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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, };
static int opa362_probe(struct platform_device *pdev) { struct device_node *node = pdev->dev.of_node; struct panel_drv_data *ddata; struct omap_dss_device *dssdev, *in; struct gpio_desc *gpio; int r; dev_dbg(&pdev->dev, "probe\n"); if (node == NULL) { dev_err(&pdev->dev, "Unable to find device tree\n"); return -EINVAL; } ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); if (!ddata) return -ENOMEM; platform_set_drvdata(pdev, ddata); gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW); if (IS_ERR(gpio)) return PTR_ERR(gpio); ddata->enable_gpio = 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; 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: omap_dss_put_device(ddata->in); return r; }

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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; }

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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", .of_match_table = opa362_of_match, .suppress_bind_attrs = true, }, }; module_platform_driver(opa362_driver); MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>"); MODULE_DESCRIPTION("OPA362 analog video amplifier with output/power control"); MODULE_LICENSE("GPL v2");

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Marek Belisko112397.91%116.67%
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Total1147100.00%6100.00%
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