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Add information about hdmi port 2 config vars

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Support for colon characters was added v14.6.0 which enabled
configurations for HDMI port 2 (e.g on the RPi 4). These configurations
are not documented anywhere else so this allows users to be able to
better find the relevant information for working with HDMI.

Change-type: patch
Relates-to: #2090
This commit is contained in:
Felipe Lalanne 2023-05-08 15:16:50 -04:00
parent ba39cf539e
commit d5cc8238cb
1 changed files with 12 additions and 9 deletions
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21
docs/configurations.md
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@ -36,15 +36,18 @@ In addition to these values, there may be some device-type specific configuratio
This device type utilizes a [config.txt](https://www.raspberrypi.org/documentation/configuration/config-txt/README.md) file of which we offer some values to be configured. The following values are not all the configurations found in the `config.txt` file and are just balena additions or edits to the OEM version.
| Name | Type | Reboots | Default | Description | Valid from |
| -------------------------------------- | ------- | ------- | -------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------- |
| BALENA_HOST_CONFIG_dtoverlay | string | true | "vc4-fkms-v3d" | Allows loading [custom device tree overlays](https://github.com/raspberrypi/linux/blob/rpi-4.19.y/arch/arm/boot/dts/overlays/README). | v1.0.0 |
| BALENA_HOST_CONFIG_device_tree_overlay | string | true | "vc4-fkms-v3d" | Allows loading [custom device tree overlays](https://github.com/raspberrypi/linux/blob/rpi-4.19.y/arch/arm/boot/dts/overlays/README). | v1.0.0 |
| BALENA_HOST_CONFIG_dtparam | string | true | "i2c_arm=on","spi=on","audio=on" | Allows setting parameters for the default overlay. | v1.0.0 |
| BALENA_HOST_CONFIG_device_tree_param | string | true | "i2c_arm=on","spi=on","audio=on" | Allows setting parameters for the default overlay. | v1.0.0 |
| BALENA_HOST_CONFIG_disable_splash | integer | true | 1 | Enable / Disable the splash screen to display image on boot. | v1.0.0 |
| BALENA_HOST_CONFIG_gpu_mem | integer | true | 16 | Define device GPU memory in megabytes. | v1.0.0 |
| BALENA_HOST_CONFIG_gpio | string | true | undefined | Allows GPIO pins to be set to specific modes and values at boot time. See [here](https://www.raspberrypi.org/documentation/configuration/config-txt/gpio.md) for more. | v1.0.0 |
| Name | Type | Reboots | Default | Description | Valid from |
| --------------------------------------- | ------- | ------- | -------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ---------- |
| BALENA_HOST_CONFIG_dtoverlay | string | true | "vc4-fkms-v3d" | Allows loading [custom device tree overlays](https://github.com/raspberrypi/linux/blob/rpi-4.19.y/arch/arm/boot/dts/overlays/README). | v1.0.0 |
| BALENA_HOST_CONFIG_device_tree_overlay | string | true | "vc4-fkms-v3d" | Allows loading [custom device tree overlays](https://github.com/raspberrypi/linux/blob/rpi-4.19.y/arch/arm/boot/dts/overlays/README). | v1.0.0 |
| BALENA_HOST_CONFIG_dtparam | string | true | "i2c_arm=on","spi=on","audio=on" | Allows setting parameters for the default overlay. | v1.0.0 |
| BALENA_HOST_CONFIG_device_tree_param | string | true | "i2c_arm=on","spi=on","audio=on" | Allows setting parameters for the default overlay. | v1.0.0 |
| BALENA_HOST_CONFIG_disable_splash | integer | true | 1 | Enable / Disable the splash screen to display image on boot. | v1.0.0 |
| BALENA_HOST_CONFIG_gpu_mem | integer | true | 16 | Define device GPU memory in megabytes. | v1.0.0 |
| BALENA_HOST_CONFIG_gpio | string | true | undefined | Allows GPIO pins to be set to specific modes and values at boot time. See [here](https://www.raspberrypi.org/documentation/configuration/config-txt/gpio.md) for more. | v1.0.0 |
| BALENA_HOST_CONFIG_hdmi_force_hotplug:1 | number | true | undefined | Force the HDMI hotplug signal on HDMI port 2. See [here](https://www.raspberrypi.com/documentation/computers/config_txt.html#hdmi_force_hotplug) for more. | v14.6.0 |
| BALENA_HOST_CONFIG_hdmi_group:1 | number | true | undefined | Define the HDMI output group on HDMI port 2. See [here](https://www.raspberrypi.com/documentation/computers/config_txt.html#hdmi_group) for more. | v14.6.0 |
| BALENA_HOST_CONFIG_hdmi_mode:1 | number | true | undefined | Define the HDMI output format on HDMI port 2. See [here](https://www.raspberrypi.com/documentation/computers/config_txt.html#hdmi_mode) for more. | v14.6.0 |
## ConfigFS