Ticket #89 (closed defect: fixed)

Opened 12 years ago

Last modified 11 years ago

determine correct gamma calibration values and put them in LCM config code

Reported by: laforge@… Owned by: sean_chiang@…
Priority: high Milestone:
Component: kernel Version: current svn head
Severity: critical Keywords:
Cc: sean_chiang@…, buglog@… Blocked By:
Blocking: Estimated Completion (week):
HasPatchForReview: PatchReviewResult:


The LCM has four values related to gamma adjustmend. find out what the optimal
setting is, and store that in the LCM initialization code path.

Change History

comment:1 Changed 12 years ago by laforge@…

  • Severity changed from normal to critical

comment:2 Changed 12 years ago by sean_mosko@…

  • Owner changed from laforge@… to teddy@…
  • Milestone set to Phase 0

Please talk with Sean Chiang (sean_chiang@…) if you need help.

comment:3 Changed 12 years ago by laforge@…

  • Cc sean_chiang@… added

Teddy, Sean,

this bug is critical, and it's how open for some 40 days. Is there any progress
in this area?

comment:4 Changed 12 years ago by laforge@…

  • blocked set to 31

comment:5 Changed 12 years ago by mickey@…

still no answer... any news on this?

comment:6 Changed 12 years ago by alphaone@…

  • blocked 31 deleted

Bug #31 was a different problem

comment:7 Changed 12 years ago by laforge@…

  • Owner changed from teddy@… to sean_chiang@…

Sean: do we have anyone familiar with color calibration in the software/hardare
team? We need to find the optimum values for those registers....

comment:8 Changed 12 years ago by sean_chiang@…

I could be mistaken, but I think those values should have been defined in the
lcm specification, what the "red" is, what the "green" is and what the "blue"
is. So, we just ask the specification from provider and write a lcm color test
program for operator with color analyzer, right?

comment:9 Changed 12 years ago by laforge@…

ok, sure. If you think we just need to ask the LCM manufacturer for the correct
values, please ask them and get back to me with the correct values for this panel.

comment:10 Changed 12 years ago by sean_chiang@…

If we want to do "color calibration", we only need to adjust these 5 registers,
0xb1,0xb5,0xc7,0xc8,0xc9. Unfortunately, no optimal(correct) values, it totally
depends on our requirement. So, what's our requirement, darker, brighter, or..?
BTW, I got a setting (b1,b5,c7,c8,c9) = (0x9f,0x2b,0xb07f,0x64,0x91), and it
looks better for me.

comment:11 Changed 12 years ago by alphaone@…

What's the status on this bug?

comment:12 Changed 11 years ago by willie_chen@…

  • Status changed from new to closed
  • Resolution set to fixed

Following Sean_chiang instruction, setting value is as follows

(b1,b5,c7,c8,c9) = (0x9f,0x2b,0xb07f,0x64,0x91)

comment:13 Changed 11 years ago by anonymous

  • Milestone Phase 0 deleted

Milestone Phase 0 deleted

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