Ticket #1812 (assigned defect)

Opened 10 years ago

Last modified 18 months ago

GTA01 QVGA framebuffer has lines and bad colour

Reported by: usbhostman Owned by: openmoko-kernel
Priority: normal Milestone:
Component: kernel Version: GTA01Bv4
Severity: normal Keywords:
Cc: Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: no PatchReviewResult:
Reproducible:

Description

To reproduce, get a GTA01, ssh into it and run these commands:-
chvt 4 && echo qvga-normal > /sys/devices/platform/spi_s3c24xx_gpio.1/spi0.0/state && fbset qvga

The display will become black with some light lines on it and a line down the middle. If an image is displayed the colours will be wrong.
I have tried the fb.modes from stefan, but this did not make any difference. The fbset I am using says it is Version 2.1 (23/06/1999)

Change History

comment:1 Changed 10 years ago by usbhostman

The fb.modes file says this:-

# Timings for GTA01 VGA and QVGA mode

mode "480x640"

# D: 26.000 MHz, H: 43.334 kHz, V: 65.657 Hz
geometry 480 640 480 640 16
timings 38461 104 8 2 16 8 2
accel false

endmode

mode "vga"

# D: 26.000 MHz, H: 43.334 kHz, V: 65.657 Hz
geometry 480 640 480 640 16
timings 38461 104 8 2 16 8 2
accel false

endmode

mode "240x320"

# D: 8.475 MHz, H: 24.635 kHz, V: 75.569 Hz
geometry 240 320 240 320 16
timings 118000 88 8 2 2 8 2
accel false

endmode

mode "qvga"

# D: 8.475 MHz, H: 24.635 kHz, V: 75.569 Hz
geometry 240 320 240 320 16
timings 118000 88 8 2 2 8 2
accel false

endmode

but if I change to qvga mode fbset says:-

mode "240x320-204"

# D: 25.000 MHz, H: 69.444 kHz, V: 204.248 Hz
geometry 240 320 240 320 16
timings 40000 104 8 2 16 8 2
rgba 5/11,6/5,5/0,0/0

endmode

while in vga mode it says:-

mode "480x640-63"

# D: 25.000 MHz, H: 41.667 kHz, V: 63.131 Hz
geometry 480 640 480 640 16
timings 40000 104 8 2 16 8 2
rgba 5/11,6/5,5/0,0/0

endmode

So it seems as if fbset is ill. I am using FSO milestone 2.

comment:2 Changed 10 years ago by john_lee

  • Owner changed from hardware to openmoko-kernel
  • Status changed from new to assigned
  • HasPatchForReview unset
  • Component changed from hardware to System Software
  • Milestone FSO deleted

is this a hardware issue?

comment:3 Changed 18 months ago by JustDox

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