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 int video_bridge_get_timing(struct udevice *dev) 59 { 60 struct video_bridge_ops *ops = video_bridge_get_ops(dev); 61 62 if (!ops || !ops->get_timing) 63 return -ENOSYS; 64 return ops->get_timing(dev); 65 } 66 67 static int video_bridge_pre_probe(struct udevice *dev) 68 { 69 struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); 70 int ret; 71 72 debug("%s\n", __func__); 73 ret = gpio_request_by_name(dev, "sleep-gpios", 0, 74 &uc_priv->sleep, GPIOD_IS_OUT); 75 if (ret) { 76 debug("%s: Could not decode sleep-gpios (%d)\n", __func__, ret); 77 if (ret != -ENOENT) 78 return ret; 79 } 80 /* 81 * Drop this for now as we do not have driver model pinctrl support 82 * 83 * ret = dm_gpio_set_pull(&uc_priv->sleep, GPIO_PULL_NONE); 84 * if (ret) { 85 * debug("%s: Could not set sleep pull value\n", __func__); 86 * return ret; 87 * } 88 */ 89 ret = gpio_request_by_name(dev, "reset-gpios", 0, &uc_priv->reset, 90 GPIOD_IS_OUT); 91 if (ret) { 92 debug("%s: Could not decode reset-gpios (%d)\n", __func__, ret); 93 if (ret != -ENOENT) 94 return ret; 95 } 96 /* 97 * Drop this for now as we do not have driver model pinctrl support 98 * 99 * ret = dm_gpio_set_pull(&uc_priv->reset, GPIO_PULL_NONE); 100 * if (ret) { 101 * debug("%s: Could not set reset pull value\n", __func__); 102 * return ret; 103 * } 104 */ 105 ret = gpio_request_by_name(dev, "hotplug-gpios", 0, &uc_priv->hotplug, 106 GPIOD_IS_IN); 107 if (ret) { 108 debug("%s: Could not decode hotplug (%d)\n", __func__, ret); 109 if (ret != -ENOENT) 110 return ret; 111 } 112 113 return 0; 114 } 115 116 int video_bridge_set_active(struct udevice *dev, bool active) 117 { 118 struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); 119 int ret = 0; 120 121 debug("%s: %d\n", __func__, active); 122 if (uc_priv->sleep.dev) { 123 ret = dm_gpio_set_value(&uc_priv->sleep, !active); 124 if (ret) 125 return ret; 126 } 127 128 if (!active) 129 return 0; 130 131 if (uc_priv->reset.dev) { 132 ret = dm_gpio_set_value(&uc_priv->reset, true); 133 if (ret) 134 return ret; 135 udelay(10); 136 ret = dm_gpio_set_value(&uc_priv->reset, false); 137 } 138 139 return ret; 140 } 141 142 UCLASS_DRIVER(video_bridge) = { 143 .id = UCLASS_VIDEO_BRIDGE, 144 .name = "video_bridge", 145 .per_device_auto_alloc_size = sizeof(struct video_bridge_priv), 146 .pre_probe = video_bridge_pre_probe, 147 }; 148