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Subjectdrm: screen stuck since commit f611b1e7624c: drm: Avoid circular dependencies for CONFIG_FB
Hello

On next-20210701, my screen is stuck (see attached photo).
I bisect the problem to:
git bisect start
# good: [62fb9874f5da54fdb243003b386128037319b219] Linux 5.13
git bisect good 62fb9874f5da54fdb243003b386128037319b219
# bad: [fb0ca446157a86b75502c1636b0d81e642fe6bf1] Add linux-next specific files for 20210701
git bisect bad fb0ca446157a86b75502c1636b0d81e642fe6bf1
# good: [f63c4fda987a19b1194cc45cb72fd5bf968d9d90] Merge remote-tracking branch 'rdma/for-next'
git bisect good f63c4fda987a19b1194cc45cb72fd5bf968d9d90
# bad: [49c8769be0b910d4134eba07cae5d9c71b861c4a] Merge remote-tracking branch 'drm/drm-next'
git bisect bad 49c8769be0b910d4134eba07cae5d9c71b861c4a
# good: [4e3db44a242a4e2afe33b59793898ecbb61d478e] Merge tag 'wireless-drivers-next-2021-06-25' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers-next
git bisect good 4e3db44a242a4e2afe33b59793898ecbb61d478e
# good: [5745d647d5563d3e9d32013ad4e5c629acff04d7] Merge tag 'amd-drm-next-5.14-2021-06-02' of https://gitlab.freedesktop.org/agd5f/linux into drm-next
git bisect good 5745d647d5563d3e9d32013ad4e5c629acff04d7
# bad: [8fe44c080a53ac0ccbe88053a2e40f9acca33091] drm/amdgpu/display: fold DRM_AMD_DC_DCN3_1 into DRM_AMD_DC_DCN
git bisect bad 8fe44c080a53ac0ccbe88053a2e40f9acca33091
# good: [2c1b1ac7084edf477309d27c02d9da7f79b33cec] drm/amdgpu/vcn: drop gfxoff control for VCN2+
git bisect good 2c1b1ac7084edf477309d27c02d9da7f79b33cec
# good: [2c1b1ac7084edf477309d27c02d9da7f79b33cec] drm/amdgpu/vcn: drop gfxoff control for VCN2+
git bisect good 2c1b1ac7084edf477309d27c02d9da7f79b33cec
# bad: [d4c9b03ff6a9914b55e4e23fcac11339a2706cc6] drm/amd/pm: Add renoir throttler translation
git bisect bad d4c9b03ff6a9914b55e4e23fcac11339a2706cc6
# bad: [691cf8cd7a531dbfcc29d09a23c509a86fd9b24f] drm/amdgpu: use correct rounding macro for 64-bit
git bisect bad 691cf8cd7a531dbfcc29d09a23c509a86fd9b24f
# bad: [2fdcb55dfc86835e4845e3f422180b5596d23cb4] drm/amdkfd: use resource cursor in svm_migrate_copy_to_vram v2
git bisect bad 2fdcb55dfc86835e4845e3f422180b5596d23cb4
# bad: [6c3f953381e526a1623d4575660afae8b19ffa20] drm/sti/sti_hqvdp: Fix incorrectly named function 'sti_hqvdp_vtg_cb()'
git bisect bad 6c3f953381e526a1623d4575660afae8b19ffa20
# bad: [5ea4dba68305d9648b9dba30036cc36d4e877bca] drm/msm/a6xx: add CONFIG_QCOM_LLCC dependency
git bisect bad 5ea4dba68305d9648b9dba30036cc36d4e877bca
# good: [4a888ba03fd97d1cb0253581973533965bf348c4] drm/vgem/vgem_drv: Standard comment blocks should not use kernel-doc format
git bisect good 4a888ba03fd97d1cb0253581973533965bf348c4
# good: [c5ef15ae09637fb51ae43e1d1d98329d67dd4fd6] video: fbdev: atyfb: mach64_cursor.c: deleted the repeated word
git bisect good c5ef15ae09637fb51ae43e1d1d98329d67dd4fd6
# bad: [f611b1e7624ccdbd495c19e9805629e22265aa16] drm: Avoid circular dependencies for CONFIG_FB
git bisect bad f611b1e7624ccdbd495c19e9805629e22265aa16
# good: [ff323d6d72e1e4971c8ba9e2f3cf8afc48f22383] video: fbdev: mb862xx: use DEVICE_ATTR_RO macro
git bisect good ff323d6d72e1e4971c8ba9e2f3cf8afc48f22383
# first bad commit: [f611b1e7624ccdbd495c19e9805629e22265aa16] drm: Avoid circular dependencies for CONFIG_FB

reverting ff323d6d72e1e4971c8ba9e2f3cf8afc48f22383 lead to a correct boot (I got a viewable login prompt).

So ff323d6d72e1 cause this config change when compiling my defconfig:
--- config.fbok 2021-07-03 21:31:08.527260693 +0200
+++ config.fbko 2021-07-03 21:39:51.604275703 +0200
-CONFIG_VT_HW_CONSOLE_BINDING=y
+# CONFIG_VT_HW_CONSOLE_BINDING is not set
-CONFIG_DRM_FBDEV_EMULATION=y
-CONFIG_DRM_FBDEV_OVERALLOC=100
-CONFIG_FB_NOTIFY=y
-CONFIG_FB=y
-# CONFIG_FIRMWARE_EDID is not set
-CONFIG_FB_CFB_FILLRECT=y
-CONFIG_FB_CFB_COPYAREA=y
-CONFIG_FB_CFB_IMAGEBLIT=y
-CONFIG_FB_SYS_FILLRECT=y
-CONFIG_FB_SYS_COPYAREA=y
-CONFIG_FB_SYS_IMAGEBLIT=y
-# CONFIG_FB_FOREIGN_ENDIAN is not set
-CONFIG_FB_SYS_FOPS=y
-CONFIG_FB_DEFERRED_IO=y
-CONFIG_FB_MODE_HELPERS=y
-CONFIG_FB_TILEBLITTING=y
-
-#
-# Frame buffer hardware drivers
-#
-# CONFIG_FB_CIRRUS is not set
-# CONFIG_FB_PM2 is not set
-# CONFIG_FB_CYBER2000 is not set
-# CONFIG_FB_ARC is not set
-# CONFIG_FB_ASILIANT is not set
-# CONFIG_FB_IMSTT is not set
-# CONFIG_FB_VGA16 is not set
-# CONFIG_FB_UVESA is not set
-# CONFIG_FB_VESA is not set
-CONFIG_FB_EFI=y
-# CONFIG_FB_N411 is not set
-# CONFIG_FB_HGA is not set
-# CONFIG_FB_OPENCORES is not set
-# CONFIG_FB_S1D13XXX is not set
-# CONFIG_FB_NVIDIA is not set
-# CONFIG_FB_RIVA is not set
-# CONFIG_FB_I740 is not set
-# CONFIG_FB_LE80578 is not set
-# CONFIG_FB_MATROX is not set
-# CONFIG_FB_RADEON is not set
-# CONFIG_FB_ATY128 is not set
-# CONFIG_FB_ATY is not set
-# CONFIG_FB_S3 is not set
-# CONFIG_FB_SAVAGE is not set
-# CONFIG_FB_SIS is not set
-# CONFIG_FB_NEOMAGIC is not set
-# CONFIG_FB_KYRO is not set
-# CONFIG_FB_3DFX is not set
-# CONFIG_FB_VOODOO1 is not set
-# CONFIG_FB_VT8623 is not set
-# CONFIG_FB_TRIDENT is not set
-# CONFIG_FB_ARK is not set
-# CONFIG_FB_PM3 is not set
-# CONFIG_FB_CARMINE is not set
-# CONFIG_FB_SMSCUFX is not set
-# CONFIG_FB_UDL is not set
-# CONFIG_FB_IBM_GXT4500 is not set
-# CONFIG_FB_VIRTUAL is not set
-# CONFIG_FB_METRONOME is not set
-# CONFIG_FB_MB862XX is not set
-# CONFIG_FB_SIMPLE is not set
-# CONFIG_FB_SM712 is not set
+# CONFIG_FB is not set
-CONFIG_FRAMEBUFFER_CONSOLE=y
-CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
-# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
-# CONFIG_FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER is not set
-
-CONFIG_LOGO=y
-# CONFIG_LOGO_LINUX_MONO is not set
-# CONFIG_LOGO_LINUX_VGA16 is not set
-CONFIG_LOGO_LINUX_CLUT224=y
-# CONFIG_FB_SM750 is not set
-# CONFIG_FONTS is not set
-CONFIG_FONT_8x8=y
+CONFIG_FONT_AUTOSELECT=y

Adding CONFIG_FB to my defconfig fix also my boot.

But I still dont understand why the absence of CONFIG_FB led my screen stuck like this.

Regards
[unhandled content-type:image/jpeg]
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