On 1/27/26 7:34 AM, Dmitry Baryshkov wrote:
On Tue, Jan 27, 2026 at 06:43:32AM -0300, Val Packett wrote:
this has massively broken things on my x1e device (latitude-7455):
[..]
Reverted only this commit and it's back to normal, so I'm pretty sure it's
this.
Interesting. Could you please capture the dri-state (only the last part,
resource mapping) with the external monitor attached and with this
commit reverted?
Just reverted:
crtc[106]: crtc-0 [..]
mode: "2560x1600": 60 280710 2560 2608 2640 2720 1600 1603 1609
1720 0x48 0x9
lm[0]=0
ctl[0]=0
dspp[0]=0
lm[1]=1
ctl[1]=0
dspp[1]=1
crtc[107]: crtc-1 [..]
mode: "3840x2560": 60 631750 3840 3888 3920 4000 2560 2563 2573
2633 0x48 0x9
lm[0]=2
ctl[0]=1
lm[1]=3
ctl[1]=1
resource mapping: pingpong=106 106 107 107 # # - - # # - - - mixer=106
106 107 107 # # - - ctl=106 107 # # # # - - dspp=# # # # - - - - dsc=# #
# # - - - - cdm=# sspp=# # # # - - - - # # # # # # - - cwb=- - - -
Also, could you please run another check:
- revert this commit
- comment out LM_2, LM_3 in the catalog
- try the resulting kernel with the external monitor
Commented out:
crtc[106]: crtc-0 [..]
mode: "2560x1600": 60 280710 2560 2608 2640 2720 1600 1603 1609
1720 0x48 0x9
lm[0]=0
ctl[0]=0
dspp[0]=0
lm[1]=1
ctl[1]=0
dspp[1]=1
crtc[107]: crtc-1 [..]
mode: "3840x2560": 60 631750 3840 3888 3920 4000 2560 2563 2573
2633 0x48 0x9
lm[0]=4
ctl[0]=1
lm[1]=5
ctl[1]=1
resource mapping:
pingpong=106 106 # # 107 107 - - # # - - -
mixer=106 106 - - 107 107 - -
ctl=106 107 # # # # - -
dspp=# # # # - - - -
dsc=# # # # - - - -
cdm=#
sspp=# # # # - - - - # # # # # # - -
cwb=- - - -
Not sure why the dspp= line in resource mapping doesn't show any numbers
when a crtc has dspp[0]= and dspp[1]= o.0
But with LM 4+5, gamma control doesn't affect the external monitor.
~val
