[Intel-gfx] bad panel power sequencing delays, disabling panel

[Daniel J Blueman]

On 17 October 2012 00:43, Daniel Vetter <daniel at ffwll.ch> wrote:
> On Tue, Oct 16, 2012 at 6:10 PM, Daniel J Blueman <daniel at quora.org> wrote:
>> [drm:intel_dp_init], cur t1_t3 0 t8 0 t9 0 t10 0 t11_t12 4000
>> [drm:intel_dp_init], vbt t1_t3 0 t8 0 t9 0 t10 0 t11_t12 0
>> [drm:intel_dp_init], panel power up delay 21, power down delay 50,
>> power cycle delay 400
>> [drm:intel_dp_init], backlight on delay 5, off delay 5
>> [drm:intel_dp_init], panel power sequencer register settings: PP_ON
>> 0x40d20032, PP_OFF 0x1f40032, PP_DIV 0x186904
>> [drm:intel_dp_i2c_init], i2c_init DPDDC-A
>> [drm:ironlake_edp_panel_vdd_on], Turn eDP VDD on
>> [drm:ironlake_edp_panel_vdd_on], eDP VDD already on
>> [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x514500c8
>> [drm:intel_dp_i2c_aux_ch], aux_ch failed -110
>>
>> Notable, the nvidia DP init script executed fine; perhaps tracing the
>> I2C access may be useful?
>
> Hm, dp aux transfer don't work (this is the first one in the setup
> sequence, so it's not an i2c over aux issue with the edid read). I
> guess the mux is getting in the way. Dave, do you have an idea what's
> still going wrong? panel power sequence is now operationl. For
> reference, the wip patch series is at:
> http://cgit.freedesktop.org/~danvet/drm/log/?h=for-pzanoni

Booting for-pzanoni as of today, when switching to i915, the backlight
turns off [1]. Full boot log at
http://quora.org/2012/mbp-i915-panel-3.txt ; the same situation occurs
on 3.7-rc2 alas.

Is there a way to trigger re-enumeration of the panels after I
switcheroo to i915?

I'm checking with Seth if the mux could be the issue, though the code
shows there would be an error message if switching failed.

Thanks,
  Daniel

--- [1]

[    3.522057] [drm:intel_dp_i2c_init], i2c_init DPDDC-A
[    3.522060] [drm:ironlake_edp_panel_vdd_on], Turn eDP VDD on
[    3.522066] [drm:ironlake_edp_panel_vdd_on], eDP VDD already on
[    3.524598] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x514500c8
[    3.524601] [drm:intel_dp_i2c_aux_ch], aux_ch failed -110
[    3.527121] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x514500c8
[    3.527123] [drm:intel_dp_i2c_aux_ch], aux_ch failed -110
[    3.527144] [drm:ironlake_edp_panel_vdd_off], Turn eDP VDD off 1
[    3.527147] [drm:ironlake_edp_panel_vdd_on], Turn eDP VDD on
[    3.527150] [drm:ironlake_edp_panel_vdd_on], eDP VDD already on
[    3.529677] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x514500c8
[    3.549595] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x514500c8
[    3.564443] input: Apple Inc. Apple Internal Keyboard / Trackpad as
/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.8/2-1.8.2/2-1.8.2:1.0/input/input4
[    3.564721] apple 0003:05AC:0262.0001: input,hidraw0: USB HID v1.11
Keyboard [Apple Inc. Apple Internal Keyboard / Trackpad] on
usb-0000:00:1d.0-1.8.2/input0
[    3.569584] [drm:intel_dp_aux_ch], dp_aux_ch timeout status 0x514500c8
[    3.587024] [drm:ironlake_edp_panel_vdd_off], Turn eDP VDD off 1
[    3.587035] [drm] failed to retrieve link info, disabling eDP
-- 
Daniel J Blueman