[#4126] Colours can't display properly in BF527-EZKIT when run both qt and microwin apps

Submitted By: Vivi Li

Open Date

2008-05-26 04:05:12 Close Date

2008-06-23 06:28:41

Priority:

Medium High Assignee:

Michael Hennerich

Status:

Closed Fixed In Release:

N/A

Found In Release:

N/A Release:

Category:

N/A Board:

N/A

Processor:

N/A Silicon Revision:

Is this bug repeatable?:

Yes Resolution:

Rejected

Uboot version or rev.:

Toolchain version or rev.:

08r1-rc8

App binary format:

N/A

Summary: Colours can't display properly in BF527-EZKIT when run both qt and microwin apps

Details:

Display a picture with three green, blue and red circles on it. The blue ball is red and the red ball is blue. Green ball is OK.

root:/>

usb 1-1: new low speed USB device using musb_hdrc and address 2

usb 1-1: configuration #1 chosen from 1 choice

input: HID 413c:3010 as /class/input/input0

input: USB HID v1.10 Mouse [HID 413c:3010] on usb-musb_hdrc.0-1

root:/> export QTDIR=/usr/local/qt-embedded/

root:/> modprobe bfin_t350mcqb_fb

bfin-t350mcqb: 320x240 24-bit RGB FrameBuffer initializing...

root:/> ./pictureflow -qws

Creating mouse: Auto

Cannot open keyboard

If microwin application is run, the red bar above the window becomes blue...

root:/> modprobe bfin_t350mcqb_fb

bfin-t350mcqb: 320x240 24-bit RGB FrameBuffer initializing...

root:/> nano-X &

105

root:/> nanowm &

106

root:/> nxclock

nano-X: client closed socket: 6

root:/>

root:/> nxkbd

nano-X: client closed socket: 6

root:/>

Configs are attached.

Follow-ups

--- Michael Hennerich 2008-06-18 09:27:55

I don't fully understand.

The colors doesn't match! Always or after you started something?

The Bf527-EZkit uses RGB24 while the BF548-EZKIT uses BGR24 color format.

-Michael

--- Michael Hennerich 2008-06-23 04:13:22

This is not a Linux driver bug.

Nano-X as well as QT should evaluate struct fb_var_screeninfo red.offset and

blue.offset, but it doesn’t.

It always assumes BGR color ordering for 24-bit colors.

The framebuffer driver specifies the color ordering as following.

fbinfo->var.red.offset = 0;

fbinfo->var.green.offset = 8;

fbinfo->var.blue.offset = 16;

fbinfo->var.transp.offset = 0;

struct fb_var_screeninfo

fbinfo->var.red.offset = 0;

fbinfo->var.green.offset = 8;

fbinfo->var.blue.offset = 16;

fbinfo->var.transp.offset = 0;

This works with the fb console as well as in applications such as mplayer.

Please close this bug, there is nothing I can do in the kernel.

-Michael

--- Vivi Li 2008-06-23 06:28:40

OK, as it's the application problem, we close it.

Thank you, Michael.

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