1 /* 2 * Copyright (C) 2015 Google, Inc 3 * Written by Simon Glass <sjg@chromium.org> 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <dm.h> 10 #include <errno.h> 11 #include <edid.h> 12 #include <video_bridge.h> 13 14 int video_bridge_set_backlight(struct udevice *dev, int percent) 15 { 16 struct video_bridge_ops *ops = video_bridge_get_ops(dev); 17 18 if (!ops->set_backlight) 19 return -ENOSYS; 20 21 return ops->set_backlight(dev, percent); 22 } 23 24 int video_bridge_attach(struct udevice *dev) 25 { 26 struct video_bridge_ops *ops = video_bridge_get_ops(dev); 27 28 if (!ops->attach) 29 return -ENOSYS; 30 31 return ops->attach(dev); 32 } 33 34 int video_bridge_check_attached(struct udevice *dev) 35 { 36 struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); 37 struct video_bridge_ops *ops = video_bridge_get_ops(dev); 38 int ret; 39 40 if (!ops->check_attached) { 41 ret = dm_gpio_get_value(&uc_priv->hotplug); 42 43 return ret > 0 ? 0 : ret == 0 ? -ENOTCONN : ret; 44 } 45 46 return ops->check_attached(dev); 47 } 48 49 int video_bridge_read_edid(struct udevice *dev, u8 *buf, int buf_size) 50 { 51 struct video_bridge_ops *ops = video_bridge_get_ops(dev); 52 53 if (!ops || !ops->read_edid) 54 return -ENOSYS; 55 return ops->read_edid(dev, buf, buf_size); 56 } 57 58 static int video_bridge_pre_probe(struct udevice *dev) 59 { 60 struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); 61 int ret; 62 63 debug("%s\n", __func__); 64 ret = gpio_request_by_name(dev, "sleep-gpios", 0, 65 &uc_priv->sleep, GPIOD_IS_OUT); 66 if (ret) { 67 debug("%s: Could not decode sleep-gpios (%d)\n", __func__, ret); 68 if (ret != -ENOENT) 69 return ret; 70 } 71 /* 72 * Drop this for now as we do not have driver model pinctrl support 73 * 74 * ret = dm_gpio_set_pull(&uc_priv->sleep, GPIO_PULL_NONE); 75 * if (ret) { 76 * debug("%s: Could not set sleep pull value\n", __func__); 77 * return ret; 78 * } 79 */ 80 ret = gpio_request_by_name(dev, "reset-gpios", 0, &uc_priv->reset, 81 GPIOD_IS_OUT); 82 if (ret) { 83 debug("%s: Could not decode reset-gpios (%d)\n", __func__, ret); 84 if (ret != -ENOENT) 85 return ret; 86 } 87 /* 88 * Drop this for now as we do not have driver model pinctrl support 89 * 90 * ret = dm_gpio_set_pull(&uc_priv->reset, GPIO_PULL_NONE); 91 * if (ret) { 92 * debug("%s: Could not set reset pull value\n", __func__); 93 * return ret; 94 * } 95 */ 96 ret = gpio_request_by_name(dev, "hotplug-gpios", 0, &uc_priv->hotplug, 97 GPIOD_IS_IN); 98 if (ret) { 99 debug("%s: Could not decode hotplug (%d)\n", __func__, ret); 100 if (ret != -ENOENT) 101 return ret; 102 } 103 104 return 0; 105 } 106 107 int video_bridge_set_active(struct udevice *dev, bool active) 108 { 109 struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); 110 int ret; 111 112 debug("%s: %d\n", __func__, active); 113 ret = dm_gpio_set_value(&uc_priv->sleep, !active); 114 if (ret) 115 return ret; 116 if (active) { 117 ret = dm_gpio_set_value(&uc_priv->reset, true); 118 if (ret) 119 return ret; 120 udelay(10); 121 ret = dm_gpio_set_value(&uc_priv->reset, false); 122 } 123 124 return ret; 125 } 126 127 UCLASS_DRIVER(video_bridge) = { 128 .id = UCLASS_VIDEO_BRIDGE, 129 .name = "video_bridge", 130 .per_device_auto_alloc_size = sizeof(struct video_bridge_priv), 131 .pre_probe = video_bridge_pre_probe, 132 }; 133