search

notro / fbtft

Linux Framebuffer drivers for small TFT LCD display modules. Development has moved to https://git.kernel.org/cgit/linux/kernel/git/gregkh/staging.git/tree/drivers/staging/fbtft?h=staging-testing
1.85k stars 496 forks source link

How do you silence the console debug output on tty0? #412

Closed ghost closed 7 years ago

ghost commented 8 years ago

It looks like I have the AdaFruit 3.5 inch display working on my ARM board, but it is blasting out a lot of debug messages on my serial tty0 , which I use for my console login (backdoor/frontdoor/configuration). How do I silence these messages from the driver?

fb_hx8357d spi2.0: fbtft_write_vmem16_bus8(offset=23040, len=7680) fb_hx8357d spi2.0: fbtft_write_spi(len=4096): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ... fb_hx8357d spi2.0: fbtft_write_spi(len=3584): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ... fb_hx8357d spi2.0: Display update: 86 kB/s, fps=0 fb_hx8357d spi2.0: fbtft_update_display(start_line=24, end_line=31) fb_hx8357d spi2.0: fbtft_write_reg8_bus8: 2a 00 00 01 df fb_hx8357d spi2.0: fbtft_write_spi(len=1): 2a fb_hx8357d spi2.0: fbtft_write_spi(len=4): 00 00 01 df fb_hx8357d spi2.0: fbtft_write_reg8_bus8: 2b 00 18 00 1f fb_hx8357d spi2.0: fbtft_write_spi(len=1): 2b fb_hx8357d spi2.0: fbtft_write_spi(len=4): 00 18 00 1f fb_hx8357d spi2.0: fbtft_write_reg8_bus8: 2c fb_hx8357d spi2.0: fbtft_write_spi(len=1): 2c fb_hx8357d spi2.0: fbtft_write_vmem16_bus8(offset=23040, len=7680) fb_hx8357d spi2.0: fbtft_write_spi(len=4096): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ... fb_hx8357d spi2.0: fbtft_write_spi(len=3584): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ... fb_hx8357d spi2.0: Display update: 95 kB/s, fps=0

notro commented 8 years ago

The debug property controls this.

ghost commented 8 years ago

Thank you for the reply. I read the following: https://github.com/notro/fbtft/wiki/Debug

When set from the Device Tree, are the debug levels are the debug values numbered from (integer) 1 to 7, or is it a bit field?

<<

notro commented 8 years ago

It's a combination, bits 0,1,2 are used for the shorthand levels.

http://lxr.free-electrons.com/source/drivers/staging/fbtft/fbtft-sysfs.c#L152

notro commented 7 years ago

Closing issue since there has been no activity in a long time. Reopen if needed.