diff options
Diffstat (limited to 'drivers/video')
| -rw-r--r-- | drivers/video/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/video/Makefile | 2 | ||||
| -rw-r--r-- | drivers/video/bridge/Kconfig | 8 | ||||
| -rw-r--r-- | drivers/video/bridge/Makefile | 7 | ||||
| -rw-r--r-- | drivers/video/bridge/video-bridge-uclass.c | 111 |
5 files changed, 130 insertions, 0 deletions
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 9ae23e8dd0..3244cd7edd 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -240,3 +240,5 @@ config VIDEO_TEGRA124 HDMI. At present only eDP is supported by U-Boot. This option enables this support which can be used on devices which have an eDP display connected. + +source "drivers/video/bridge/Kconfig" diff --git a/drivers/video/Makefile b/drivers/video/Makefile index 2ead7f192c..599fe83b33 100644 --- a/drivers/video/Makefile +++ b/drivers/video/Makefile @@ -54,3 +54,5 @@ obj-$(CONFIG_AM335X_LCD) += am335x-fb.o obj-$(CONFIG_VIDEO_PARADE) += parade.o obj-${CONFIG_VIDEO_TEGRA124} += tegra124/ + +obj-y += bridge/ diff --git a/drivers/video/bridge/Kconfig b/drivers/video/bridge/Kconfig new file mode 100644 index 0000000000..7ba6b17426 --- /dev/null +++ b/drivers/video/bridge/Kconfig @@ -0,0 +1,8 @@ +config VIDEO_BRIDGE + bool "Support video bridges" + depends on DM + help + Some platforms use video bridges to convert from one output to + another. For example, where the SoC only supports eDP and the LCD + requires LVDS, an eDP->LVDS bridge chip can be used to provide the + necessary conversion. This option enables support for these devices. diff --git a/drivers/video/bridge/Makefile b/drivers/video/bridge/Makefile new file mode 100644 index 0000000000..f4bf087a18 --- /dev/null +++ b/drivers/video/bridge/Makefile @@ -0,0 +1,7 @@ +# +# Copyright (C) 2015 Google, Inc +# Written by Simon Glass <sjg@chromium.org> +# +# SPDX-License-Identifier: GPL-2.0+ + +obj-$(CONFIG_VIDEO_BRIDGE) += video-bridge-uclass.o diff --git a/drivers/video/bridge/video-bridge-uclass.c b/drivers/video/bridge/video-bridge-uclass.c new file mode 100644 index 0000000000..e1ea42816a --- /dev/null +++ b/drivers/video/bridge/video-bridge-uclass.c @@ -0,0 +1,111 @@ +/* + * Copyright (C) 2015 Google, Inc + * Written by Simon Glass <sjg@chromium.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <errno.h> +#include <video_bridge.h> + +int video_bridge_set_backlight(struct udevice *dev, int percent) +{ + struct video_bridge_ops *ops = video_bridge_get_ops(dev); + + if (!ops->set_backlight) + return -ENOSYS; + + return ops->set_backlight(dev, percent); +} + +int video_bridge_attach(struct udevice *dev) +{ + struct video_bridge_ops *ops = video_bridge_get_ops(dev); + + if (!ops->attach) + return -ENOSYS; + + return ops->attach(dev); +} + +int video_bridge_check_attached(struct udevice *dev) +{ + struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); + struct video_bridge_ops *ops = video_bridge_get_ops(dev); + int ret; + + if (!ops->check_attached) { + ret = dm_gpio_get_value(&uc_priv->hotplug); + + return ret > 0 ? 0 : ret == 0 ? -ENOTCONN : ret; + } + + return ops->check_attached(dev); +} + +static int video_bridge_pre_probe(struct udevice *dev) +{ + struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); + int ret; + + debug("%s\n", __func__); + ret = gpio_request_by_name(dev, "sleep-gpios", 0, + &uc_priv->sleep, GPIOD_IS_OUT); + if (ret) { + debug("%s: Could not decode sleep-gpios (%d)\n", __func__, ret); + return ret; + } + ret = dm_gpio_set_pull(&uc_priv->sleep, GPIO_PULL_NONE); + if (ret) { + debug("%s: Could not set sleep pull value\n", __func__); + return ret; + } + ret = gpio_request_by_name(dev, "reset-gpios", 0, &uc_priv->reset, + GPIOD_IS_OUT); + if (ret) { + debug("%s: Could not decode reset-gpios (%d)\n", __func__, ret); + return ret; + } + ret = dm_gpio_set_pull(&uc_priv->reset, GPIO_PULL_NONE); + if (ret) { + debug("%s: Could not set reset pull value\n", __func__); + return ret; + } + ret = gpio_request_by_name(dev, "hotplug-gpios", 0, &uc_priv->hotplug, + GPIOD_IS_IN); + if (ret && ret != -ENOENT) { + debug("%s: Could not decode hotplug (%d)\n", __func__, ret); + return ret; + } + + return 0; +} + +int video_bridge_set_active(struct udevice *dev, bool active) +{ + struct video_bridge_priv *uc_priv = dev_get_uclass_priv(dev); + int ret; + + debug("%s: %d\n", __func__, active); + ret = dm_gpio_set_value(&uc_priv->sleep, !active); + if (ret) + return ret; + if (active) { + ret = dm_gpio_set_value(&uc_priv->reset, true); + if (ret) + return ret; + udelay(10); + ret = dm_gpio_set_value(&uc_priv->reset, false); + } + + return ret; +} + +UCLASS_DRIVER(video_bridge) = { + .id = UCLASS_VIDEO_BRIDGE, + .name = "video_bridge", + .per_device_auto_alloc_size = sizeof(struct video_bridge_priv), + .pre_probe = video_bridge_pre_probe, +}; |