I am using ADM1032ARMZ-2R temperature sensor (as a beginner I am not allowed to post more than 2 links here, I have already posted 2 links for the images below - For datasheet please google ADM1032ARMZ-2R) with Beaglebone Black Rev C having pre-installed Debian (kernel - 3.8.13) . The datasheet of ADM1032 says that chip is available for communication at address 0x4D via SMBus Protocol. I have never worked on SMbus before but found that I2C is compatible with SMBus for 100 KHz and less. I tried doing following things
I wrote a device tree overlay. It looks like following (I have kept the frequency as 100 KHz)
// Device Tree Overlay for I2C1 uses Pins P9.17(SCLK) & P9.18(SDA)
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone", "ti,beaglebone-black";
part-number = "BBB-I2C1-4D";
version = "00A0";
exclusive-use =
"P9.18", /* i2c1_sda */
"P9.17", /* i2c1_scl */
/* the hardware ip uses */
fragment#0 {
target = <&am33xx_pinmux>;
__overlay__ {
bb_i2c1_pins: pinmux_bb_i2c1_pins {
pinctrl-single,pins = <
0x158 0x72 /* spi0_d1.i2c1_sda, SLEWCTRL_SLOW | INPUT_PULLUP | MODE2 */
0x15c 0x72 /* spi0_cs0.i2c1_scl, SLEWCTRL_SLOW | INPUT_PULLUP | MODE2 */
>;
};
};
};
fragment#1 {
target = <&i2c1>;
__overlay__ {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&bb_i2c1_pins>;
clock-frequency = <100000>;
#address-cells = <1>;
#size-cells = <0>;
/* adding adm1032 as i2c child device on the bus here */
tempsense: tempsense#4d {
compatible = "onsemi,adm1032";
reg = <0x4d>;
};
};
};
};
Compiled this file, copied the resultant .dtbo file in the /lib/firmware directory and successfully inserted it as a virtual cape in the /sys/devices/bone_capemgr.9/slots using echo command. It looks like this
I tried to observe the correctness of the above work using the following command
dtc -f -I fs /proc/device-tree | less
Intended things are happening and it looks like this (Please note that, for i2c1, the "ti,hwmods" field in the image shows "i2c2", but its actually i2c1 so please don't worry about it. I have read about it made sure that whatever it's showing is correct)
Now I am trying to do
i2cdetect -r 1
But I am not able to detect anything
at 0x02, there is a Status register available for reading
i2cget -y -f 0x4d 0x02
I get Read failed response
Where am I going wrong ? Please help.
Related
Same Hardware, new Kernel
We are trying to update to the new Kernel 5.15.32 (old Kernel 4.19.72) but the USB-PD Chip (PTN5110) just does not work:
When we start the module tcpci with our Device Tree (see below) we get the following messages:
devel#europa:/usr/lib/modules/5.15.32+g4122737b2fca$ sudo modprobe tcpci
[ 139.282440] OF: graph: no port node found in /soc/bus#2100000/i2c#21f8000/ptn5110#50
[ 139.332044] OF: graph: no port node found in /soc/bus#2100000/i2c#21f8000/ptn5110#50/connector
[ 139.341524] OF: graph: no port node found in /soc/bus#2100000/i2c#21f8000/ptn5110#50/connector
We did try to specify the port but were unlucky so far (nothing seams to work and we are trying for a few weeks now). The DT below worked wonderful in the old kernel but not the new one.
After loading the module we see some communication over the I2C port and everything seams to work fine. As soon as we plug in a USB connection the Kernel gets flooded with IRQ requests (or so it seams). The I2C bus is filled with data exchange and none of the consoles are reacting to any keystroke. After unplugging the USB connection the system reacts normal again. (the system seams to be blocked completely)
Our device tree:
/ {
regulators {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;
reg_usb_otg1_vbus: regulator#2 {
compatible = "regulator-fixed";
reg = <2>;
regulator-name = "usb_otg1_vbus";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usb_otg1_vbus>;
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
gpio = <&gpio2 8 GPIO_ACTIVE_HIGH>;
enable-active-high;
status = "okay";
};
};
};
&usbotg1 {
/*pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usbotg1>;*/
dr_mode = "otg";
status = "okay";
disable-over-current;
vbus-supply = <®_usb_otg1_vbus>;
};
&i2c4 {
clock-frequency = <100000>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_i2c4>;
status = "okay";
usb_pd: ptn5110#50 {
compatible = "nxp,ptn5110";
reg = <0x50>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usb_pd>;
interrupt-parent = <&gpio2>;
interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
wakeup-source;
usb_con: connector {
compatible = "usb-c-connector";
label = "USB-C";
data-role = "dual";
power-role = "dual";
try-power-role = "sink";
source-pdos = <PDO_FIXED(VSAFE5V, 2000, PDO_FIXED_USB_COMM | PDO_FIXED_DUAL_ROLE)>;
sink-pdos = <PDO_FIXED(VSAFE5V, 2000, PDO_FIXED_USB_COMM | PDO_FIXED_DUAL_ROLE)
//PDO_FIXED(VSAFE5V, 3000, 0)
//PDO_FIXED(9000, 3000, 0)
PDO_FIXED(12000, 3000, 0)
PDO_FIXED(20000, 3000, 0)>;
//PDO_FIXED(20000, 5000, 0)>;
op-sink-microwatt = <10000000>;
};
};
};
&iomuxc {
pinctrl_i2c4: i2c4grp {
fsl,pins = <
MX6UL_PAD_UART2_TX_DATA__I2C4_SCL 0x4001b8b0
MX6UL_PAD_UART2_RX_DATA__I2C4_SDA 0x4001b8b0
>;
};
pinctrl_usb_pd: usbpdgrp {
fsl,pins = <
MX6UL_PAD_ENET2_TX_DATA0__GPIO2_IO11 0x0001b020 /* Alert Interrupt */
MX6UL_PAD_ENET2_TX_CLK__GPIO2_IO14 0x0001b020 /* Fault Interrupt */
>;
};
pinctrl_usb_otg1_vbus: usbotg1 {
fsl,pins = <
MX6UL_PAD_ENET2_RX_DATA0__GPIO2_IO08 0x000000b9
MX6UL_PAD_ENET2_RX_DATA1__USB_OTG1_OC 0x000010b0
>;
};
};
So I did find out that the Chip goes into Fault every time I plug in a USB Connection. (It comes out of the Fault as soon as I unplug the USB)
On the I2C Bus I see that the Kernel Module keeps trying to reset the Fault flag without success.
I see a repeating pattern of:
0x50 Write 0x10
0x50 Read 0x00 0x02
0x50 Write 0x10 0x00 0x02
As I wrote, the chip was working fine with the old Kernel 4.19.72 but not with the new Kernel 5.15.68.
If someone could tell me what is going wrong I would be very thankful.
As it turned out there is a bug in the Kernel Module tcpci that has this effect on the PTN5110 Chip. NXP already has a patch for their Kernel but it was not ported to the Mainline Kernel. I implemented the same patch for the Kernel 5.15.91 and the chip is working flawlessly now. For anyone with the same problem, here my patch:
diff --git a/drivers/usb/typec/tcpm/tcpci.c b/drivers/usb/typec/tcpm/tcpci.c
index 5340a3a3a81b..0d715e091b78 100644
--- a/drivers/usb/typec/tcpm/tcpci.c
+++ b/drivers/usb/typec/tcpm/tcpci.c
## -628,6 +628,9 ## static int tcpci_init(struct tcpc_dev *tcpc)
if (ret < 0)
return ret;
+ /* Clear fault condition */
+ regmap_write(tcpci->regmap, TCPC_FAULT_STATUS, 0x80);
+
if (tcpci->controls_vbus)
reg = TCPC_POWER_STATUS_VBUS_PRES;
else
## -644,7 +647,8 ## static int tcpci_init(struct tcpc_dev *tcpc)
reg = TCPC_ALERT_TX_SUCCESS | TCPC_ALERT_TX_FAILED |
TCPC_ALERT_TX_DISCARDED | TCPC_ALERT_RX_STATUS |
- TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_CC_STATUS;
+ TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_CC_STATUS |
+ TCPC_ALERT_V_ALARM_LO | TCPC_ALERT_FAULT;
if (tcpci->controls_vbus)
reg |= TCPC_ALERT_POWER_STATUS;
/* Enable VSAFE0V status interrupt when detecting VSAFE0V is supported */
## -728,6 +732,13 ## irqreturn_t tcpci_irq(struct tcpci *tcpci)
tcpm_vbus_change(tcpci->port);
}
+ /* Clear the fault status anyway */
+ if (status & TCPC_ALERT_FAULT) {
+ regmap_read(tcpci->regmap, TCPC_FAULT_STATUS, &raw);
+ regmap_write(tcpci->regmap, TCPC_FAULT_STATUS,
+ raw | TCPC_FAULT_STATUS_MASK);
+ }
+
if (status & TCPC_ALERT_RX_HARD_RST)
tcpm_pd_hard_reset(tcpci->port);
I found this solution here: https://source.codeaurora.org/external/imx/linux-imx/commit/drivers/usb/typec/tcpm/tcpci.c?h=lf-5.15.y&id=2a263f918b25725e0434afa9ff3b83b1bc18ef74
I am attempting to upgrade to a more recent kernel, so I've grabbed the yocto build from https://github.com/gumstix/yocto-manifest and built that. That image successfully boots my unit, so that is a good first step. I had to enable the SPIDEV driver in the kernel, and that part worked.
My board is based on a gumstix Tobi board, and that's what device tree my u-boot loads at boot time. However, I cannot seem to get SPI to work. I have added the following to the file omap3-overo-storm-tobi.dts file:
&omap3_pmx_core {
mcspi1_pins: pinmux_mcspi1_pins {
pinctrl-single,pins = <
OMAP3_CORE1_IOPAD(0x21c8, PIN_INPUT | MUX_MODE0) /* mcspi1_clk.mcspi1_clk */
OMAP3_CORE1_IOPAD(0x21ca, PIN_INPUT | MUX_MODE0) /* mcspi1_simo.mcspi1_simo */
OMAP3_CORE1_IOPAD(0x21cc, PIN_INPUT | MUX_MODE0) /* mcspi1_somi.mcspi1_somi */
OMAP3_CORE1_IOPAD(0x21ce, PIN_INPUT | MUX_MODE0) /* mcspi1_cs0.mcspi1_cs0 */
OMAP3_CORE1_IOPAD(0x21d0, PIN_INPUT | MUX_MODE0) /* mcspi1_cs1.mcspi1_cs1 */
>;
};
};
&mcspi1 {
pinctrl-names = "default";
pinctrl-0 = <&mcspi1_pins>;
spidev#0 {
compatible = "spidev";
spi-max-frequency = <48000000>;
reg = <1>;
spi-cpha;
};
};
Upon a reboot this has successfully created a /dev/spidev1.1 device, but if I attempt to send anything to it I do not see the clock lines or the CS1 line go active. I feel like I'm missing a piece here, but I'm unsure where to go. Any suggestions would be very much appreciated.
My goal is to write a simple .dts file (to be compiled to .dtbo using DT 1.4.4) to configure a GPIO output on boot on a Beaglebone Black Rev C running Debian 10.3
I intend to place the .dtbo in /lib/firmware and then specify it in /boot/uEnv.txt
I understand some parts of the .dts file and have tried decompiling exisiting .dtbo files in /lib/firmware/ for guidance but none of them are a simple GPIO output example. A lot of online resources involve make and make install but I believe DT should be able to handle it by now right?
I was able to get the following to compile but with issue:
/* dtc -O dtb -o BB-P8_13-LED.dtbo -b 0 -# BB-P8_13-LED-00A0.dts */
/dts-v1/;
/plugin/;
/ {
compatible = "ti,beaglebone-black";
/* identification */
part-number = "BB-P8_13-LED";
version = "00A0";
/* state the resources this cape uses */
exclusive-use =
/* the pin header uses */
"P8.13", /* GPIO_23 */
/* the hardware ip uses */
"gpio23";
fragment#0 {
target = <&am33xx_pinmux>;
__overlay__ {
bb_gpio23_pin: pinmux_bb_gpio23_pin {
pinctrl-single,pins = < 0x024 0x07 >; /*P8_13 GPIO23 MODE7*/
};
};
};
fragment#1 {
target = <&gpio23>;
__overlay__ {
leds {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&bb_gpio23_pin>;
compatible = "gpio-leds";
P8_13 {
label = "P8_13";
default-state = "on";
};
};
};
};
};
Q: Why does loading this .dtbo in /boot/uEnv.txt cause all other GPIOs to disappear from /sys/class/gpio/? I thought fragment0 was for excluding a single gpio, not all of them.
###Additional custom capes
uboot_overlay_addr4=/lib/firmware/BB-P8_13-LED-00A0.dtbo
Q: Where are the files for controlling the GPIO (for testing) or rather what can I add to my .dts file so the gpio23 still appears in /sys/class/gpio or even /sys/class/leds? Ultimately I want to be able to control this GPIO with Node-RED.
Q: Do I need to be consistent with my use of P8.13 vs. P8_13? I think I'm mixing up terminology used in .dts files that get compiled with make vs DT.
Q: I think my fragment#1 P8_13 child node is missing something to specify the gpio bank and active high/low setting. Something like "gpios = <&gpio3 19 GPIO_ACTIVE_HIGH>;" Where can I look to research which bank GPIO23 is in? What does the '19' mean in that statement?
So Dr. Derek Molly did a really nice job of laying this out and I was able to use the example in his repo. Here is a page he made for explaining how to configure GPIO at boot using Device Tree Overlays:
http://derekmolloy.ie/beaglebone/beaglebone-gpio-programming-on-arm-embedded-linux/
Even though his solution is for kernel 3.8 I was able to get the following to compile on 4.19
/* dtc -O dtb -o BB-P8_13-LED-00A0.dtbo -b 0 -# BB-P8_13-LED-00A0.dts */
/dts-v1/;
/plugin/;
/{
compatible = "ti,beaglebone-black";
part-number = "BB-P8_13-LED";
version = "00A0";
fragment#0 {
target = <&am33xx_pinmux>;
__overlay__ {
pinctrl_test: BB-P8_13-LED {
pinctrl-single,pins = <
0x024 0x27 /* P8_13 9 PULLUP ENABLED OUTPUT MODE7 - The LED Output */
>;
};
};
};
fragment#1 {
target = <&ocp>;
__overlay__ {
test_helper: helper {
compatible = "bone-pinmux-helper";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_test>;
status = "okay";
};
};
};
};
All that needs to be edited for a different GPIO pin is the "0x024" (address offset) and the "0x27" to set various aspects of the GPIO like pullup vs. pulldown and pinmux mode. Derek Molly has an older version of his guide which has the table for building the pinmux binary values (that need to be converted to hex): http://derekmolloy.ie/gpios-on-the-beaglebone-black-using-device-tree-overlays/
Most of the information is available in the Beaglebone SRM which I should probably read at some point.
The .dts file in my first answer did not fix my problem. GPIO P8_13 still boots as an input. After more digging and testing I have discovered it is NOT possible to make a GPIO direction survive a reboot. It will always boot to the default and the best you can do is enable a pullup or pulldown resistor to keep the pin high or low until a custom service file (or program) can write to /sys/class/gpio/gpioXXX/direction. I even tried decompiling am335x-boneblack.dtb, editing it, and re-compiling with no luck.
This is sad and incredibly frustrating. What good is an output that flickers during reboot? Guess I'll have to compensate with fancy external circuitry.
Per the original question, you can author a dts file where the GPIO remains in /sys/gpio/class/. See the article I wrote below for an example that works this way.
https://takeofftechnical.com/beaglebone-black-led-control/
In my application I need RS485 interfaces. I am using some UARTs from am3352 but I need few more, so I'm trying to expand using SPI and max3109 chip.
I have successfully added max3109 to my device tree using module max310x - it shows two devices: /dev/ttyMAX0 and /dev/ttyMAX1. Here is the device tree fragment:
&spi1 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi1_pins>;
num_cs = <1>;
cs-gpios = <&gpio2 17 0>;
ti,pindir-d0-out-d1-in;
max310x_0: max0#0 {
compatible = "maxim,max3109";
reg = <0>;
spi-max-frequency = <24000000>;
clocks = <&clk1m8>;
clock-names = "xtal";
interrupt-parent = <&gpio2>;
interrupts = <12 IRQ_TYPE_EDGE_FALLING>;
gpio-controller;
#gpio-cells = <2>;
clk1m8: clk1m8 {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <1843200>;
};
};
};
and the pins:
spi1_pins: pinmux_spi1_pins {
pinctrl-single,pins = <
0x108 (PIN_INPUT_PULLUP | MUX_MODE2) /* (H16) gmii1_col.spi1_sclk */
0x10c (PIN_INPUT_PULLUP | MUX_MODE2) /* (H17) gmii1_crs.spi1_d0 */
0x110 (PIN_INPUT_PULLUP | MUX_MODE2) /* (J15) gmii1_rxer.spi1_d1 */
>;
};
UARTs from max3109 are connected to rs232/rs485 converter with max3109's RTSn pins conected to both DE and RE pins.
The problem: UARTS on max3109 seems to work fine - both rs485 are transmitting data, but not reciving. Problem is that RTS is always at 0V level...
In UARTs from am3352 I am using in device tree the following property: "linux,rs485-enabled-at-boot-time". But adding it to main max310x_0 node is not giving any effect - this node is the expander node (containing 2 UARTs and gpio-controller), not the UART itself.
My idea is that I need to add a child-nodes for each UART and in it place the property "linux,rs485-enabled-at-boot-time". But I don't have a clue how to do it. I tried something like this:
&spi1 {
status = "okay";
pinctrl-names = "default";
pinctrl-0 = <&spi1_pins>;
num_cs = <1>;
cs-gpios = <&gpio2 17 0>;
ti,pindir-d0-out-d1-in;
max310x_0: max0#0 {
compatible = "maxim,max3109";
reg = <0>;
spi-max-frequency = <24000000>;
clocks = <&clk1m8>;
clock-names = "xtal";
interrupt-parent = <&gpio2>;
interrupts = <12 IRQ_TYPE_EDGE_FALLING>;
gpio-controller;
#gpio-cells = <2>;
clk1m8: clk1m8 {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <1843200>;
};
ttyMAX0 {
linux,rs485-enabled-at-boot-time;
};
ttyMAX1 {
linux,rs485-enabled-at-boot-time;
};
};
};
but it didn't worked.
My question: How am I supposed to add those child-nodes (if that's the proper way) and what should I place in them to make RTS work?
EDIT:
after sawdust suggestion it seems it's impossible to add rs485 mode in device tree.
So I tried to add this functionality to device tree and I think I'm starting to understand how things work down in here. To start with something I'm printing port.flags value to dmesg and it seems my little insertion works (a bit) - it changes the value depending on presence of linux,rs485-enabled-at-boot-time parameter in device tree.
Here is the code I have inserted:
if (of_property_read_bool(dev->of_node, "linux,rs485-enabled-at-boot-time"))
s->p[i].port.flags |= SER_RS485_ENABLED;
printk("s->p[i].port.flags is: %d\n",s->p[i].port.flags);
The value of port.flags toggles from 134225920 to 134225921 depending on presence of linux,rs485-enabled-at-boot-time.
but the RTS pin still have constant 0V on my oscilloscope...
I'm trying to figure out if SER_RS485_RTS_ON_SEND and SER_RS485_RTS_AFTER_SEND have something to do with this, but I'm prete sure it's only for reverting RTS signal.
After few attempts IOCTL was the best and easiest solution. Here is some example code that helped me much. https://gist.github.com/amarburg/07564916d8d32e20e6ae375c1c83a995
It's basic example how to turn RS485 mode on and off using IOCTL and read it's current mode. Works with both CPUs internal UARTS and MAX3109.
I have used Yocto to create a small linux image for the Beaglebone Black. I think I have most everything working like I want it, except I need access to UARTs 2 and 4. When I was using the standard Debian image, I did this with device tree overlays and capemgr. However, I found that the kernel built with Yocto doesn't have capemgr.
My options seem to be:
get the kernel to build with capemgr, or
modify the device tree file with the necessary changes.
Option 2 seems much easier.
The device tree overlays for the UARTs are here and here. I have gone about trying to include those in a couple ways.
I decompiled the device tree blob I had been using and tried to
include these files from there.
I downloaded the full set of dts files and tried to include the
UART device tree overlays in am335x-boneblack.dts.
Both approaches yield an error something like this:
Error: am335x-boneblack.dts:1.1-2 syntax error
FATAL ERROR: Unable to parse input tree
However, I noticed that I get a similar error when trying to compile am335x-boneblack.dts even without modifying it, so I'm likely not even doing that right. (Using the command dtc -I dts -O dtb -o result.dtb am335x-boneblack.dts)
Obviously I don't know what I'm doing. I suspect the device tree overlays have to be modified in some way to be used in the way I'm trying to use them. Or maybe I'm not doing the include right (just adding a #include to the top of the file).
Does anybody have any ideas what I might be doing wrong? Is what I'm trying to do even possible?
So I got this working by taking my device tree blob, decompiling it, and merging in sections from the device tree overlay files, and recompiling. I realized I needed uarts 1 and 2 instead of 2 and 4, so this is slightly different than my original problem.
To decompile the device tree blob:
dtc -I dtb -O dts -o am335x-boneblack.dts am335x-boneblack.dtb
I used the existing uart0 as an example to show me the right sections to work in.
I added a section for uart1 and uart2 in the pinmux section under the section for uart0. It now looks like this:
pinmux_uart0_pins {
pinctrl-single,pins = <0x170 0x30 0x174 0x0>;
linux,phandle = <0x27>;
phandle = <0x27>;
};
bb_uart1_pins: pinmux_bb_uart1_pins {
pinctrl-single,pins = <
0x184 0x20 /* P9.24 uart1_txd.uart1_txd OUTPUT */
0x180 0x20 /* P9.26 uart1_rxd.uart1_rxd INPUT */
>;
};
bb_uart2_pins: pinmux_bb_uart2_pins {
pinctrl-single,pins = <
0x150 0x21 /okay* spi0_sclk.uart2_rxd | MODE1 */
0x154 0x01 /* spi0_d0.uart2_txd | MODE1 */
>;
};
Then later, the serial sections need to be enabled and told what pins to use. I modified existing uart sections, and it now looks like this:
serial#44e09000 {
compatible = "ti,omap3-uart";
ti,hwmods = "uart1";
clock-frequency = <0x2dc6c00>;
reg = <0x44e09000 0x2000>;
interrupts = <0x48>;
status = "okay";
dmas = <0x26 0x1a 0x26 0x1b>;
dma-names = "tx", "rx";
pinctrl-names = "default";
pinctrl-0 = <0x27>;
};
serial#48022000 {
compatible = "ti,omap3-uart";
ti,hwmods = "uart2";
clock-frequency = <0x2dc6c00>;
reg = <0x48022000 0x2000>;
interrupts = <0x49>;
status = "okay";
dmas = <0x26 0x1c 0x26 0x1d>;
dma-names = "tx", "rx";
pinctrl-names = "default";
pinctrl-0 = <&bb_uart1_pins>;
};
serial#48024000 {
compatible = "ti,omap3-uart";
ti,hwmods = "uart3";
clock-frequency = <0x2dc6c00>;
reg = <0x48024000 0x2000>;
interrupts = <0x4a>;
status = "okay";
dmas = <0x26 0x1e 0x26 0x1f>;
dma-names = "tx", "rx";
pinctrl-names = "default";
pinctrl-0 = <&bb_uart2_pins>;
}
To recompile the device tree:
dtc -I dts -O dtb -o am335x-boneblack.dtb am335x-boneblack.dts
In short, I managed to get this working despite having little to no idea how device trees work.
I also needed to disable hdmi which I did by setting status equal to "disabled" in the hdmi section.