Re: vc4: NULL pointer dereference in drm_client_dev_hotplug

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Hi,

> Sergey Suloev <ssuloev@xxxxxxxxxxxxx> hat am 1. Oktober 2018 um 12:17 geschrieben:
> 
> 
> Hi, Stefan,
> 
> 
> On 09/30/2018 10:38 PM, Stefan Wahren wrote:
> > Hi Sergey,
> >
> >> Sergey Suloev <ssuloev@xxxxxxxxxxxxx> hat am 30. September 2018 um 15:24 geschrieben:
> >>
> >>
> >> Here is my log
> >>
> >> [    2.868157] [drm:drm_setup_crtcs [drm_kms_helper]] connector 29
> >> enabled? yes
> >> [    2.868199] [drm:drm_setup_crtcs [drm_kms_helper]] connector 44
> >> enabled? no
> >> [    2.868234] [drm:drm_setup_crtcs [drm_kms_helper]] connector 50
> >> enabled? yes
> >> [    2.868271] [drm:drm_setup_crtcs [drm_kms_helper]] looking for
> >> cmdline mode on connector 29
> >> [    2.868308] [drm:drm_setup_crtcs [drm_kms_helper]] looking for
> >> preferred mode on connector 29 0
> >> [    2.868343] [drm:drm_setup_crtcs [drm_kms_helper]] found mode 1280x1024
> >> [    2.868381] [drm:drm_setup_crtcs [drm_kms_helper]] looking for
> >> cmdline mode on connector 50
> >> [    2.868417] [drm:drm_setup_crtcs [drm_kms_helper]] looking for
> >> preferred mode on connector 50 0
> >> [    2.868465] [drm:drm_setup_crtcs [drm_kms_helper]] found mode 1920x1440
> >> [    2.868500] [drm:drm_setup_crtcs [drm_kms_helper]] picking CRTCs for
> >> 2048x2048 config
> >> [    2.868561] [drm:drm_setup_crtcs [drm_kms_helper]] desired mode
> >> 1280x1024 set on crtc 95 (0,0)
> >> [    2.868673] [drm:drm_mode_object_get [drm]] OBJ ID: 29 (2)
> >> [    2.868709] [drm:drm_setup_crtcs [drm_kms_helper]] desired mode
> >> 1920x1440 set on crtc 74 (0,0)
> >> [    2.868790] [drm:drm_mode_object_get [drm]] OBJ ID: 50 (2)
> >> [    2.868832] [drm:drm_fb_helper_generic_probe [drm_kms_helper]]
> >> surface width(1920), height(2880) and bpp(32)
> >> [    3.001470] [drm:drm_internal_framebuffer_create [drm]] bad
> >> framebuffer height 2880, should be >= 0 && <= 2048
> >> [    3.001650] vc4-drm soc:gpu: [drm:drm_fb_helper_fbdev_setup
> >> [drm_kms_helper]] *ERROR* Failed to set fbdev configuration
> >>
> > does this config work with 4.18?
> 
> I have checked with the tag v4.18 as per your request and I can confirm 
> that the issue does not exists in 4.18.

i tried to follow the threads mentioned by Noralf, but it seems the regression regarding CONFIG_DRM_FBDEV_OVERALLOC=200 hasn't been fixed yet.

It would be nice to have this fixed in 4.19 LTS.

Regards
Stefan

> 
> Sergey
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