drm/amdgpu: Retry DDC probing on DVI on failure if we got an HPD interrupt

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HPD signals on DVI ports can be fired off before the pins required for
DDC probing actually make contact, due to the pins for HPD making
contact first. This results in a HPD signal being asserted but DDC
probing failing, resulting in hotplugging occasionally failing.

Rescheduling the hotplug work for a second when we run into an HPD
signal with a failing DDC probe usually gives enough time for the rest
of the connector's pins to make contact, and fixes this issue.

Signed-off-by: xurui <xurui@kylinos.cn>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

xurui 2022-12-23 17:28:58 +08:00 • committed by Alex Deucher

parent f200521899

commit 90f56611fc

8 changed files with 36 additions and 15 deletions

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2

drivers/gpu/drm/amd/amdgpu/amdgpu.h

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22

drivers/gpu/drm/amd/amdgpu/amdgpu_connectors.c

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drivers/gpu/drm/amd/amdgpu/amdgpu_display.c

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drivers/gpu/drm/amd/amdgpu/amdgpu_mode.h

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6

drivers/gpu/drm/amd/amdgpu/dce_v10_0.c

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drivers/gpu/drm/amd/amdgpu/dce_v11_0.c

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drivers/gpu/drm/amd/amdgpu/dce_v6_0.c

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drivers/gpu/drm/amd/amdgpu/dce_v8_0.c

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