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authorFedor Pchelkin <[email protected]>2025-02-17 10:54:40 +0000
committerGreg Kroah-Hartman <[email protected]>2025-02-19 14:19:56 +0000
commitbf4f9ae1cb08ccaafbe6874be6c46f59b83ae778 (patch)
treeaa6c3200634d773ba49b18a31ec2fe5a5f47752d /drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
parentacpi: typec: ucsi: Introduce a ->poll_cci method (diff)
downloadkernel-bf4f9ae1cb08ccaafbe6874be6c46f59b83ae778.tar.gz
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usb: typec: ucsi: increase timeout for PPM reset operations
It is observed that on some systems an initial PPM reset during the boot phase can trigger a timeout: [ 6.482546] ucsi_acpi USBC000:00: failed to reset PPM! [ 6.482551] ucsi_acpi USBC000:00: error -ETIMEDOUT: PPM init failed Still, increasing the timeout value, albeit being the most straightforward solution, eliminates the problem: the initial PPM reset may take up to ~8000-10000ms on some Lenovo laptops. When it is reset after the above period of time (or even if ucsi_reset_ppm() is not called overall), UCSI works as expected. Moreover, if the ucsi_acpi module is loaded/unloaded manually after the system has booted, reading the CCI values and resetting the PPM works perfectly, without any timeout. Thus it's only a boot-time issue. The reason for this behavior is not clear but it may be the consequence of some tricks that the firmware performs or be an actual firmware bug. As a workaround, increase the timeout to avoid failing the UCSI initialization prematurely. Fixes: b1b59e16075f ("usb: typec: ucsi: Increase command completion timeout value") Cc: stable <[email protected]> Signed-off-by: Fedor Pchelkin <[email protected]> Reviewed-by: Heikki Krogerus <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
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