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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * OPA362 analog video amplifier with output/power control4 *5 * Copyright (C) 2014 Golden Delicious Computers6 * Author: H. Nikolaus Schaller <hns@goldelico.com>7 *8 * based on encoder-tfp4109 *10 * Copyright (C) 2013 Texas Instruments11 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com>12 */13 14#include <linux/gpio/consumer.h>15#include <linux/module.h>16#include <linux/mod_devicetable.h>17#include <linux/platform_device.h>18#include <linux/slab.h>19 20#include <video/omapfb_dss.h>21 22struct panel_drv_data {23 struct omap_dss_device dssdev;24 struct omap_dss_device *in;25 26 struct gpio_desc *enable_gpio;27 28 struct omap_video_timings timings;29};30 31#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)32 33static int opa362_connect(struct omap_dss_device *dssdev,34 struct omap_dss_device *dst)35{36 struct panel_drv_data *ddata = to_panel_data(dssdev);37 struct omap_dss_device *in = ddata->in;38 int r;39 40 dev_dbg(dssdev->dev, "connect\n");41 42 if (omapdss_device_is_connected(dssdev))43 return -EBUSY;44 45 r = in->ops.atv->connect(in, dssdev);46 if (r)47 return r;48 49 dst->src = dssdev;50 dssdev->dst = dst;51 52 return 0;53}54 55static void opa362_disconnect(struct omap_dss_device *dssdev,56 struct omap_dss_device *dst)57{58 struct panel_drv_data *ddata = to_panel_data(dssdev);59 struct omap_dss_device *in = ddata->in;60 61 dev_dbg(dssdev->dev, "disconnect\n");62 63 WARN_ON(!omapdss_device_is_connected(dssdev));64 if (!omapdss_device_is_connected(dssdev))65 return;66 67 WARN_ON(dst != dssdev->dst);68 if (dst != dssdev->dst)69 return;70 71 dst->src = NULL;72 dssdev->dst = NULL;73 74 in->ops.atv->disconnect(in, &ddata->dssdev);75}76 77static int opa362_enable(struct omap_dss_device *dssdev)78{79 struct panel_drv_data *ddata = to_panel_data(dssdev);80 struct omap_dss_device *in = ddata->in;81 int r;82 83 dev_dbg(dssdev->dev, "enable\n");84 85 if (!omapdss_device_is_connected(dssdev))86 return -ENODEV;87 88 if (omapdss_device_is_enabled(dssdev))89 return 0;90 91 in->ops.atv->set_timings(in, &ddata->timings);92 93 r = in->ops.atv->enable(in);94 if (r)95 return r;96 97 if (ddata->enable_gpio)98 gpiod_set_value_cansleep(ddata->enable_gpio, 1);99 100 dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;101 102 return 0;103}104 105static void opa362_disable(struct omap_dss_device *dssdev)106{107 struct panel_drv_data *ddata = to_panel_data(dssdev);108 struct omap_dss_device *in = ddata->in;109 110 dev_dbg(dssdev->dev, "disable\n");111 112 if (!omapdss_device_is_enabled(dssdev))113 return;114 115 if (ddata->enable_gpio)116 gpiod_set_value_cansleep(ddata->enable_gpio, 0);117 118 in->ops.atv->disable(in);119 120 dssdev->state = OMAP_DSS_DISPLAY_DISABLED;121}122 123static void opa362_set_timings(struct omap_dss_device *dssdev,124 struct omap_video_timings *timings)125{126 struct panel_drv_data *ddata = to_panel_data(dssdev);127 struct omap_dss_device *in = ddata->in;128 129 dev_dbg(dssdev->dev, "set_timings\n");130 131 ddata->timings = *timings;132 dssdev->panel.timings = *timings;133 134 in->ops.atv->set_timings(in, timings);135}136 137static void opa362_get_timings(struct omap_dss_device *dssdev,138 struct omap_video_timings *timings)139{140 struct panel_drv_data *ddata = to_panel_data(dssdev);141 142 dev_dbg(dssdev->dev, "get_timings\n");143 144 *timings = ddata->timings;145}146 147static int opa362_check_timings(struct omap_dss_device *dssdev,148 struct omap_video_timings *timings)149{150 struct panel_drv_data *ddata = to_panel_data(dssdev);151 struct omap_dss_device *in = ddata->in;152 153 dev_dbg(dssdev->dev, "check_timings\n");154 155 return in->ops.atv->check_timings(in, timings);156}157 158static void opa362_set_type(struct omap_dss_device *dssdev,159 enum omap_dss_venc_type type)160{161 /* we can only drive a COMPOSITE output */162 WARN_ON(type != OMAP_DSS_VENC_TYPE_COMPOSITE);163 164}165 166static const struct omapdss_atv_ops opa362_atv_ops = {167 .connect = opa362_connect,168 .disconnect = opa362_disconnect,169 170 .enable = opa362_enable,171 .disable = opa362_disable,172 173 .check_timings = opa362_check_timings,174 .set_timings = opa362_set_timings,175 .get_timings = opa362_get_timings,176 177 .set_type = opa362_set_type,178};179 180static int opa362_probe(struct platform_device *pdev)181{182 struct device_node *node = pdev->dev.of_node;183 struct panel_drv_data *ddata;184 struct omap_dss_device *dssdev, *in;185 struct gpio_desc *gpio;186 int r;187 188 dev_dbg(&pdev->dev, "probe\n");189 190 if (node == NULL) {191 dev_err(&pdev->dev, "Unable to find device tree\n");192 return -EINVAL;193 }194 195 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);196 if (!ddata)197 return -ENOMEM;198 199 platform_set_drvdata(pdev, ddata);200 201 gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW);202 if (IS_ERR(gpio))203 return PTR_ERR(gpio);204 205 ddata->enable_gpio = gpio;206 207 in = omapdss_of_find_source_for_first_ep(node);208 if (IS_ERR(in)) {209 dev_err(&pdev->dev, "failed to find video source\n");210 return PTR_ERR(in);211 }212 213 ddata->in = in;214 215 dssdev = &ddata->dssdev;216 dssdev->ops.atv = &opa362_atv_ops;217 dssdev->dev = &pdev->dev;218 dssdev->type = OMAP_DISPLAY_TYPE_VENC;219 dssdev->output_type = OMAP_DISPLAY_TYPE_VENC;220 dssdev->owner = THIS_MODULE;221 222 r = omapdss_register_output(dssdev);223 if (r) {224 dev_err(&pdev->dev, "Failed to register output\n");225 goto err_reg;226 }227 228 return 0;229err_reg:230 omap_dss_put_device(ddata->in);231 return r;232}233 234static void opa362_remove(struct platform_device *pdev)235{236 struct panel_drv_data *ddata = platform_get_drvdata(pdev);237 struct omap_dss_device *dssdev = &ddata->dssdev;238 struct omap_dss_device *in = ddata->in;239 240 omapdss_unregister_output(&ddata->dssdev);241 242 WARN_ON(omapdss_device_is_enabled(dssdev));243 if (omapdss_device_is_enabled(dssdev))244 opa362_disable(dssdev);245 246 WARN_ON(omapdss_device_is_connected(dssdev));247 if (omapdss_device_is_connected(dssdev))248 opa362_disconnect(dssdev, dssdev->dst);249 250 omap_dss_put_device(in);251}252 253static const struct of_device_id opa362_of_match[] = {254 { .compatible = "omapdss,ti,opa362", },255 {},256};257MODULE_DEVICE_TABLE(of, opa362_of_match);258 259static struct platform_driver opa362_driver = {260 .probe = opa362_probe,261 .remove = opa362_remove,262 .driver = {263 .name = "amplifier-opa362",264 .of_match_table = opa362_of_match,265 },266};267 268module_platform_driver(opa362_driver);269 270MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");271MODULE_DESCRIPTION("OPA362 analog video amplifier with output/power control");272MODULE_LICENSE("GPL v2");273