[edk2-devel] [edk2-platform][PATCH v1 1/2] Platforms/RaspberryPi: Add RPi4 settings to Readme
Pete Batard
pete at akeo.ie
Mon Jun 15 10:43:50 UTC 2020
Hi Samer,
One remark inline:
On 2020.06.13 14:41, Samer El-Haj-Mahmoud wrote:
> Add a section to the the RPi4 Readme for 'Configuration Settings', with
> instructions on scripting from the UEFI Shell.
>
> Cc: Leif Lindholm <leif at nuviainc.com>
> Cc: Ard Biesheuvel <ard.biesheuvel at arm.com>
> Cc: Pete Batard <pete at akeo.ie>
> Cc: Andrei Warkentin <awarkentin at vmware.com>
> Signed-off-by: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud at arm.com>
> ---
> Platform/RaspberryPi/RPi4/Readme.md | 74 +++++++++++++++++++-
> 1 file changed, 73 insertions(+), 1 deletion(-)
>
> diff --git a/Platform/RaspberryPi/RPi4/Readme.md b/Platform/RaspberryPi/RPi4/Readme.md
> index 03eb6c391aca..d27465d965ab 100644
> --- a/Platform/RaspberryPi/RPi4/Readme.md
> +++ b/Platform/RaspberryPi/RPi4/Readme.md
> @@ -143,4 +143,76 @@ all functionality may be available.
>
> - Network booting via onboard NIC.
> - SPCR hardcodes type to PL011, and thus will not expose correct
> - (miniUART) UART if DT overlays to switch UART are used on Pi 4B.
> \ No newline at end of file
> + (miniUART) UART if DT overlays to switch UART are used on Pi 4B.
> +
> +# Configuration Settings
> +The Raspberry Pi UEFI configuration settings can be viewed and changed using both the UI configuration menu (under `Device Manager` -> `Raspberry Pi Configuration`), as well as the UEFI Shell. To configure using the UEFI Shell, use `setvar` command to read/write the UEFI variables with GUID = `CD7CC258-31DB-22E6-9F22-63B0B8EED6B5`.
> +
> +The syntax to read a setting is:
> +```
> +setvar <NAME> -guid CD7CC258-31DB-22E6-9F22-63B0B8EED6B5
> +```
> +
> +The syntax to write a setting is:
> +```
> +setvar <NAME> -guid CD7CC258-31DB-22E6-9F22-63B0B8EED6B5 -bs -rt -nv =<VALUE>
> +```
> +
> +For string-type settings (e.g. Asset Tag), the syntax to write is:
> +```
> +setvar <NAME> -guid CD7CC258-31DB-22E6-9F22-63B0B8EED6B5 -bs -rt -nv =L"<VALUE>" =0x0000
> +```
> +
> +UEFI Setting | NAME | VALUE
> +-----------------------------|-----------------------|-----------------------------
> +**CPU Configuration** |
> +CPU Clock | `CpuClock` | Low = `0x00000000`<br> Default = `0x00000001` (default)<br> Max = `0x00000002`<br> Custom = `0x00000003`
> +CPU Clock Rate (MHz) | `CustomCpuClock` | Hex numeric value, 4-bytes<br> (e.g. `0x000005DC` for 1500 MHz)
> +**Display Configuration** |
> +Virtual 640x480 | `DisplayEnableScaledVModes` | Checked = Bit 0 set (i.e. `<DisplayEnableScaledVModes> | 0x01`
1. A closing parenthesis is missing at the end.
2. A backslash must be added before the pipe in the last code section,
or else it won't display.
This is due to https://github.com/github/markup/issues/1078.
In other words, you need to have:
`<DisplayEnableScaledVModes> \| 0x01`
> +Virtual 800x600 | `DisplayEnableScaledVModes` | Checked = Bit 1 set (i.e. `<DisplayEnableScaledVModes> | 0x02`
> +Virtual 1024x768 | `DisplayEnableScaledVModes` | Checked = Bit 2 set (i.e. `<DisplayEnableScaledVModes> | 0x04`
> +Virtual 720p | `DisplayEnableScaledVModes` | Checked = Bit 3 set (i.e. `<DisplayEnableScaledVModes> | 0x08`
> +Virtual 1080p | `DisplayEnableScaledVModes` | Checked = Bit 4 set (i.e. `<DisplayEnableScaledVModes> | 0x10`
> +Native resolution | `DisplayEnableScaledVModes` | Checked = Bit 5 set (i.e. `<DisplayEnableScaledVModes> | 0x20` (default)
Same as above for these 5 lines.
Regards,
/Pete
> +Screenshot support | `DisplayEnableSShot` | Control-Alt-F12 = `0x00000001` (default)<br> Not Enabled = `0x00000000`
> +**Advanced Configuration** |
> +Limit RAM to 3 GB | `RamLimitTo3GB` | Disable = `0x00000000` <br> Enabled= `0x00000001` (default)
> +System Table Selection | `SystemTableMode`| ACPI = `0x00000000` (default)<br> ACPI + Devicetree = `0x00000001` <br> Devicetree = `0x00000002`
> +Asset Tag | `AssetTag` | String, 32 characters or less (e.g. `L"ABCD123"`)<br> (default `L""`)
> +**SD/MMC Configuration** |
> +uSD/eMMC Routing | `SdIsArasan` | Arasan SDHC = `0x00000001` (default) <br> eMMC2 SDHCI = `0x00000000`
> +Multi-Block Support | `MmcDisableMulti` | Multi-block transfers = `0x00000000` (default)<br> Single block transfers = `0x00000001`
> +uSD Max Bus Width | `MmcForce1Bit` | 4-bit Mode = `0x00000000` (default)<br> 1-bit Mode = `0x00000001`
> +uSD Force Default Speed | `MmcForceDefaultSpeed` | Allow High Speed = `0x00000000` (default)<br> Force Default Speed = `0x00000001`
> +SD Default Speed (MHz) | `MmcSdDefaultSpeedMHz` | Hex numeric value, 4-bytes (e.g. `0x00000019` for 25 MHz)<br>(default 25)
> +SD High Speed (MHz) | `MmcSdHighSpeedMHz` | Hex numeric value, 4-bytes (e.g. `0x00000032` for 50 MHz)<br>(default 50)
> +**Debugging Configuration** |
> +JTAG Routing | `DebugEnableJTAG` | Enable JTAG via GPIO = `0x00000001`<br> Disable JTAG= `0x00000000` (default)
> +
> +**Examples:**
> +
> +- To read the 'System Table Selection' setting :
> +```
> +setvar SystemTableMode -guid CD7CC258-31DB-22E6-9F22-63B0B8EED6B5
> +```
> +
> +- To change the 'System Table Selection' setting to 'Devicetree' :
> +```
> +setvar SystemTableMode -guid CD7CC258-31DB-22E6-9F22-63B0B8EED6B5 -bs -rt -nv =0x00000002
> +```
> +
> +- To read the 'Limit RAM to 3 GB' setting:
> +```
> +setvar RamLimitTo3GB -guid CD7CC258-31DB-22E6-9F22-63B0B8EED6B5
> +```
> +
> +- To change the 'Limit RAM to 3 GB' setting to 'Disabled':
> +```
> +setvar RamLimitTo3GB -guid CD7CC258-31DB-22E6-9F22-63B0B8EED6B5 -bs -rt -nv =0x00000000
> +```
> +
> +- To change the Asset Tag to the string "ASSET-TAG-123" :
> +```
> +setvar AssetTag -guid CD7CC258-31DB-22E6-9F22-63B0B8EED6B5 -bs -rt -nv =L"ASSET-TAG-123" =0x0000
> +```
>
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