i915/kms/backlight-combo mode problem

[Melchior FRANZ]

* Joey Lee -- Monday 09 May 2011:
> The following is debug patch, and please add kernel parameter
> drm.debug=0x02 :

The result is with acpi_osi=Linux:


boot phase:
[    3.310274] [drm:intel_panel_get_backlight], get backlight val = 2890
[    3.310280] [drm:intel_panel_get_backlight], get backlight PWM = 2890
[    3.310615] [drm:intel_panel_get_backlight], get backlight val = 2890
[    3.310617] [drm:intel_panel_get_backlight], get backlight PWM = 2890
[    3.310619] [drm:intel_panel_set_backlight], set backlight PWM = 0
[    3.310622] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189401930
[    3.310624] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[    3.310626] [drm:intel_panel_set_backlight], set backlight level = 0

[    3.641522] [drm:intel_panel_set_backlight], set backlight PWM = 2890
[    3.641525] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189399040
[    3.641527] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[    3.641529] [drm:intel_panel_set_backlight], set backlight level = 2890

[   11.410563] video LNXVIDEO:01: Restoring backlight state



brightness up:
   [no output]



brightness down:
[  152.697127] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  152.697136] [drm:intel_panel_set_backlight], set backlight PWM = 283
[  152.697141] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189401930
[  152.697146] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  152.697150] [drm:intel_panel_set_backlight], set backlight level = 283

[  166.720631] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  166.720640] [drm:intel_panel_set_backlight], set backlight PWM = 578
[  166.720645] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189399323
[  166.720649] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  166.720654] [drm:intel_panel_set_backlight], set backlight level = 578

[  178.091776] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  178.091784] [drm:intel_panel_set_backlight], set backlight PWM = 861
[  178.091789] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189399618
[  178.091793] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  178.091797] [drm:intel_panel_set_backlight], set backlight level = 861

[  188.888370] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  188.888379] [drm:intel_panel_set_backlight], set backlight PWM = 1156
[  188.888383] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189399901
[  188.888388] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  188.888392] [drm:intel_panel_set_backlight], set backlight level = 1156

[  196.411657] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  196.411665] [drm:intel_panel_set_backlight], set backlight PWM = 1439
[  196.411670] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189400196
[  196.411674] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  196.411678] [drm:intel_panel_set_backlight], set backlight level = 1439

[  201.256229] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  201.256238] [drm:intel_panel_set_backlight], set backlight PWM = 1734
[  201.256243] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189400479
[  201.256247] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  201.256252] [drm:intel_panel_set_backlight], set backlight level = 1734

[  206.939838] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  206.939846] [drm:intel_panel_set_backlight], set backlight PWM = 2017
[  206.939851] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189400774
[  206.939856] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  206.939860] [drm:intel_panel_set_backlight], set backlight level = 2017

[  213.779732] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  213.779740] [drm:intel_panel_set_backlight], set backlight PWM = 2312
[  213.779744] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189401057
[  213.779749] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  213.779753] [drm:intel_panel_set_backlight], set backlight level = 2312

[  222.583806] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  222.583814] [drm:intel_panel_set_backlight], set backlight PWM = 2595
[  222.583819] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189401352
[  222.583824] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  222.583828] [drm:intel_panel_set_backlight], set backlight level = 2595

[  229.345860] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  229.345870] [drm:intel_panel_set_backlight], set backlight PWM = 2595
[  229.345874] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189401635
[  229.345879] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  229.345883] [drm:intel_panel_set_backlight], set backlight level = 2595



brightness up:
[  240.594464] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  240.594474] [drm:intel_panel_set_backlight], set backlight PWM = 2312
[  240.594479] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189401635
[  240.594483] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  240.594487] [drm:intel_panel_set_backlight], set backlight level = 2312

[  240.816722] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  240.816730] [drm:intel_panel_set_backlight], set backlight PWM = 2017
[  240.816734] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189401352
[  240.816739] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  240.816743] [drm:intel_panel_set_backlight], set backlight level = 2017

[  240.999973] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  240.999981] [drm:intel_panel_set_backlight], set backlight PWM = 1734
[  240.999985] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189401057
[  240.999990] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  240.999994] [drm:intel_panel_set_backlight], set backlight level = 1734

[  241.212456] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  241.212464] [drm:intel_panel_set_backlight], set backlight PWM = 1439
[  241.212469] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189400774
[  241.212473] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  241.212478] [drm:intel_panel_set_backlight], set backlight level = 1439

[  241.395611] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  241.395619] [drm:intel_panel_set_backlight], set backlight PWM = 1156
[  241.395624] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189400479
[  241.395628] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  241.395633] [drm:intel_panel_set_backlight], set backlight level = 1156

[  242.039460] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  242.039470] [drm:intel_panel_set_backlight], set backlight PWM = 283
[  242.039475] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189400196
[  242.039479] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  242.039484] [drm:intel_panel_set_backlight], set backlight level = 283

[  242.044495] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  242.044502] [drm:intel_panel_set_backlight], set backlight PWM = 283
[  242.044507] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189399323
[  242.044511] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  242.044515] [drm:intel_panel_set_backlight], set backlight level = 283

[  242.077032] [drm:intel_panel_get_max_backlight], max backlight PWM = 2890
[  242.077038] [drm:intel_panel_set_backlight], set backlight PWM = 0
[  242.077043] [drm:intel_panel_set_backlight], set backlight tmp(1) = 189399323
[  242.077047] [drm:intel_panel_set_backlight], set backlight tmp(2) = 189399040
[  242.077052] [drm:intel_panel_set_backlight], set backlight level = 0

m.