HDMI resolution not supported?

[sam.a...@gmail.com]

Hi,

I have a beaglebone with which I am having trouble getting an HDMI output on a 50 inch tv. I am getting HDMI output on 32 inch TV but not on a 50 inch. It just says resolution not supported.

I have tried forcing different resolutions through uEnv.txt but that did not work.

What changes can I make to get HDMI output?

Any help would be greatly appreciated.

Thank you

[Charles Steinkuehler]

On 2/2/2019 11:38 AM, sam.a...@gmail.com wrote:
> Hi,
>
> I have a beaglebone with which I am having trouble getting an HDMI output
> on a 50 inch tv. I am getting HDMI output on 32 inch TV but not on a 50
> inch. It just says resolution not supported.
> I have tried forcing different resolutions through uEnv.txt but that did
> not work.
>
> What changes can I make to get HDMI output?

Which resolutions did you try?

The BBB has a limited pixel clock frequency. The resolutions most
likely to work with your TV are 720p (60 Hz) and 1080i (60 frame/30
hz), since HDMI requires one of these resolutions to be supported by
any HDMI device capable of HD (per the HDMI 1.4b spec):

"An HDMI Sink that accepts 60Hz video formats, and that supports HDTV
capability shall support 1280x720p @ 59.94/60Hz or 1920x1080i @
59.94/60Hz video format timings."

If you're lucky, the TV will support 1080p30, which will typically
look better than 1080i, but this isn't an HDMI requirement.

--
Charles Steinkuehler
cha...@steinkuehler.net

[sam.a...@gmail.com]

Hi Charles,

I have tried all the resolutions mentioned in this website: https://elinux.org/Beagleboard:BeagleBoneBlack_HDMI

This is my boot log:

U-Boot 2018.09-00002-g0b54a51eee (Sep 10 2018 - 19:41:39 -0500), Build: jenkins5
                                                                               
CPU  : AM335X-GP rev 2.1                                                       
I2C:   ready                                                                   
DRAM:  512 MiB                                                                 
No match for driver 'omap_hsmmc'                                               
No match for driver 'omap_hsmmc'                                               
Some drivers were not found                                                    
Reset Source: Power-on reset has occurred.                                     
RTC 32KCLK Source: External.                                                   
MMC:   OMAP SD/MMC: 0, OMAP SD/MMC: 1                                          
Loading Environment from EXT4... ** File not found /boot/uboot.env **          
                                                                               
** Unable to read "/boot/uboot.env" from mmc0:1 **                             
Board: BeagleBone Black                                                        
<ethaddr> not set. Validating first E-fuse MAC                                 
BeagleBone Black:                                                              
BeagleBone: cape eeprom: i2c_probe: 0x54:                                      
BeagleBone: cape eeprom: i2c_probe: 0x55:                                      
BeagleBone: cape eeprom: i2c_probe: 0x56:                                      
BeagleBone: cape eeprom: i2c_probe: 0x57:                                      
Net:   eth0: MII MODE                                                          
cpsw, usb_ether                                                                
Press SPACE to abort autoboot in 2 seconds                                     
board_name=[A335BNLT] ...                                                      
board_rev=[000C] ...                                                           
switch to partitions #0, OK                                                    
mmc0 is current device                                                         
SD/MMC found on device 0                                                       
switch to partitions #0, OK                                                    
mmc0 is current device                                                         
Scanning mmc 0:1...                                                            
gpio: pin 56 (gpio 56) value is 0                                              
gpio: pin 55 (gpio 55) value is 0                                              
gpio: pin 54 (gpio 54) value is 0                                              
gpio: pin 53 (gpio 53) value is 1                                              
switch to partitions #0, OK                                                    
mmc0 is current device                                                         
gpio: pin 54 (gpio 54) value is 1                                              
Checking for: /uEnv.txt ...                                                    
Checking for: /boot.scr ...                                                    
Checking for: /boot/boot.scr ...                                               
Checking for: /boot/uEnv.txt ...                                               
gpio: pin 55 (gpio 55) value is 1                                              
2120 bytes read in 12 ms (171.9 KiB/s)                                         
Loaded environment from /boot/uEnv.txt                                         
Checking if uname_r is set in /boot/uEnv.txt...                                
gpio: pin 56 (gpio 56) value is 1                                              
Running uname_boot ...                                                         
loading /boot/vmlinuz-4.14.71-ti-r80 ...                                       
10416640 bytes read in 667 ms (14.9 MiB/s)                                     
debug: [enable_uboot_overlays=1] ...                                           
debug: [enable_uboot_cape_universal=1] ...                                     
debug: [uboot_base_dtb_univ=am335x-boneblack-uboot-univ.dtb] ...               
uboot_overlays: [uboot_base_dtb=am335x-boneblack-uboot-univ.dtb] ...           
debug: unable to find [am335x-boneblack-uboot-univ.dtb] using [am335x-boneblack.
debug: [uboot_base_dtb_univ=am335x-boneblack-uboot.dtb] ...                    
uboot_overlays: [uboot_base_dtb=am335x-boneblack-uboot.dtb] ...                
loading /boot/dtbs/4.14.71-ti-r80/am335x-boneblack.dtb ...                     
60317 bytes read in 18 ms (3.2 MiB/s)                                          
uboot_overlays: [fdt_buffer=0x60000] ...                                       
uboot_overlays: loading /lib/firmware/BB-BONE-eMMC1-01-00A0.dtbo ...           
1440 bytes read in 26 ms (53.7 KiB/s)                                          
uboot_overlays: loading /lib/firmware/BB-HDMI-TDA998x-00A0.dtbo ...            
5127 bytes read in 33 ms (151.4 KiB/s)                                         
uboot_overlays: loading /lib/firmware/BB-ADC-00A0.dtbo ...                     
711 bytes read in 254 ms (2 KiB/s)                                             
uboot_overlays: loading /lib/firmware/AM335X-PRU-RPROC-4-14-TI-00A0.dtbo ...   
3513 bytes read in 44 ms (77.1 KiB/s)                                          
uboot_overlays: loading /lib/firmware/univ-bbb-EVA-00A0.dtbo ...               
61976 bytes read in 171 ms (353.5 KiB/s)                                       
loading /boot/initrd.img-4.14.71-ti-r80 ...                                    
4739448 bytes read in 308 ms (14.7 MiB/s)                                      
debug: [console=ttyO0,115200n8 bone_capemgr.uboot_capemgr_enabled=1 root=/dev/m.
debug: [bootz 0x82000000 0x88080000:485178 88000000] ...                       
## Flattened Device Tree blob at 88000000                                      
   Booting using the fdt blob at 0x88000000                                    
   Loading Ramdisk to 8fb7a000, end 8ffff178 ... OK                            
   reserving fdt memory region: addr=88000000 size=7e000                       
   Loading Device Tree to 8faf9000, end 8fb79fff ... OK                        
                                                                               
Starting kernel ...                                                            
                                                                               
[    0.001586] timer_probe: no matching timers found                           
[    1.102494] wkup_m3_ipc 44e11324.wkup_m3_ipc: could not get rproc handle    
[    1.403763] omap_voltage_late_init: Voltage driver support not added        
[    1.411113] PM: Cannot get wkup_m3_ipc handle                               
[    1.813307] i2c i2c-0: Failed to register i2c client tda998x at 0x70 (-16)  
[    1.820327] i2c i2c-0: of_i2c: Failure registering /ocp/i2c@44e0b000/tda19988
[    1.836928] hdmi-audio-codec hdmi-audio-codec.0.auto: ASoC: no source widgetk
[    1.845906] hdmi-audio-codec hdmi-audio-codec.0.auto: ASoC: Failed to add roX
[    1.875666] musb-hdrc musb-hdrc.1: VBUS_ERROR in a_wait_vrise (80, <SessEnd)c
                                                                               
Debian GNU/Linux 9 beaglebone ttyS0                                            
                                                                               
BeagleBoard.org Debian Image 2018-10-07                                        
                                                                               
Support/FAQ: http://elinux.org/Beagleboard:BeagleBoneBlack_Debian              
                                                                               
default username:password is [debian:temppwd]                                  
                                                                               
beaglebone login:

********************************

As you can see in the boot log, when kernel is loading, I get an error for i2c failure of tda19988.

[    1.813307] i2c i2c-0: Failed to register i2c client tda998x at 0x70 (-16)  
[    1.820327] i2c i2c-0: of_i2c: Failure registering /ocp/i2c@44e0b000/tda19988

What's the reason of getting this error?

Thank you,