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Subject8353d30e747f ("drm/amd/display: disable stream if pixel clock changed with link active")
Hi,

patch in $Subject breaks booting on a laptop here, GPU details are
below. The machine stops booting right when it attempts to switch modes
during boot, to a higher mode than the default VGA one. Machine doesn't
ping and is otherwise unresponsive so that a hard reset is the only
thing that helps.

Reverting that patch ontop of -rc7 fixes it and the machine boots just fine.

Thx.

[ 1.628086] ata1.00: supports DRM functions and may not be fully accessible
[ 1.632050] ata1.00: supports DRM functions and may not be fully accessible
[ 1.895818] [drm] amdgpu kernel modesetting enabled.
[ 1.897628] [drm] initializing kernel modesetting (CARRIZO 0x1002:0x9874 0x103C:0x807E 0xC4).
[ 1.898256] [drm] register mmio base: 0xD0C00000
[ 1.898422] [drm] register mmio size: 262144
[ 1.898583] [drm] add ip block number 0 <vi_common>
[ 1.898759] [drm] add ip block number 1 <gmc_v8_0>
[ 1.898931] [drm] add ip block number 2 <cz_ih>
[ 1.899082] [drm] add ip block number 3 <gfx_v8_0>
[ 1.899241] [drm] add ip block number 4 <sdma_v3_0>
[ 1.899439] [drm] add ip block number 5 <powerplay>
[ 1.899573] [drm] add ip block number 6 <dm>
[ 1.899693] [drm] add ip block number 7 <uvd_v6_0>
[ 1.899827] [drm] add ip block number 8 <vce_v3_0>
[ 1.911458] [drm] BIOS signature incorrect 5b 7
[ 1.912551] [drm] UVD is enabled in physical mode
[ 1.912707] [drm] VCE enabled in physical mode
[ 1.912921] [drm] vm size is 64 GB, 2 levels, block size is 10-bit, fragment size is 9-bit
[ 1.913837] [drm] Detected VRAM RAM=512M, BAR=512M
[ 1.913998] [drm] RAM width 128bits UNKNOWN
[ 1.915149] [drm] amdgpu: 512M of VRAM memory ready
[ 1.915306] [drm] amdgpu: 3072M of GTT memory ready.
[ 1.915468] [drm] GART: num cpu pages 262144, num gpu pages 262144
[ 1.916139] [drm] PCIE GART of 1024M enabled (table at 0x000000F400900000).
[ 1.918733] [drm] Found UVD firmware Version: 1.91 Family ID: 11
[ 1.918950] [drm] UVD ENC is disabled
[ 1.919680] [drm] Found VCE firmware Version: 52.4 Binary ID: 3
[ 1.925963] [drm] DM_PPLIB: values for Engine clock
[ 1.926106] [drm] DM_PPLIB: 300000
[ 1.926205] [drm] DM_PPLIB: 360000
[ 1.926304] [drm] DM_PPLIB: 423530
[ 1.926404] [drm] DM_PPLIB: 514290
[ 1.926516] [drm] DM_PPLIB: 626090
[ 1.926629] [drm] DM_PPLIB: 720000
[ 1.926743] [drm] DM_PPLIB: Validation clocks:
[ 1.926952] [drm] DM_PPLIB: engine_max_clock: 72000
[ 1.927117] [drm] DM_PPLIB: memory_max_clock: 80000
[ 1.927281] [drm] DM_PPLIB: level : 8
[ 1.927435] [drm] DM_PPLIB: values for Display clock
[ 1.927594] [drm] DM_PPLIB: 300000
[ 1.927708] [drm] DM_PPLIB: 400000
[ 1.927822] [drm] DM_PPLIB: 496560
[ 1.927936] [drm] DM_PPLIB: 626090
[ 1.928048] [drm] DM_PPLIB: 685720
[ 1.928161] [drm] DM_PPLIB: 757900
[ 1.928275] [drm] DM_PPLIB: Validation clocks:
[ 1.928419] [drm] DM_PPLIB: engine_max_clock: 72000
[ 1.928584] [drm] DM_PPLIB: memory_max_clock: 80000
[ 1.928748] [drm] DM_PPLIB: level : 8
[ 1.928901] [drm] DM_PPLIB: values for Memory clock
[ 1.929058] [drm] DM_PPLIB: 333000
[ 1.929172] [drm] DM_PPLIB: 800000
[ 1.929403] [drm] DM_PPLIB: Validation clocks:
[ 1.929549] [drm] DM_PPLIB: engine_max_clock: 72000
[ 1.929716] [drm] DM_PPLIB: memory_max_clock: 80000
[ 1.929919] [drm] DM_PPLIB: level : 8
[ 1.930148] [drm] Display Core initialized with v3.2.104!
[ 2.003938] [drm] UVD initialized successfully.
[ 2.204023] [drm] VCE initialized successfully.
[ 2.206228] [drm] fb mappable at 0xA0EE4000
[ 2.206375] [drm] vram apper at 0xA0000000
[ 2.206514] [drm] size 14745600
[ 2.206654] [drm] fb depth is 24
[ 2.206760] [drm] pitch is 10240
[ 2.207123] fbcon: amdgpudrmfb (fb0) is primary device
[ 2.301263] amdgpu 0000:00:01.0: [drm] fb0: amdgpudrmfb frame buffer device
[ 2.320735] [drm] Initialized amdgpu 3.40.0 20150101 for 0000:00:01.0 on minor 0


--
Regards/Gruss,
Boris.

https://people.kernel.org/tglx/notes-about-netiquette

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