[PATCH 04/11] Documentation: PM: amd-pstate: introducing recommended reboot requirement during driver switch

Perry Yuan
2024-05-07T07:16:09Z

It is highly recommended to reboot the system when switching between the 'amd-pstate'
and 'acpi-cpufreq' drivers to avoid potential unexpected issues.
Rebooting will ensure that the system properly applies the changes and allows for a
seamless transition between the drivers.

Reported-by : Reported-by: Artem S. Tashkinov <aros@gmx.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=215801
Signed-off-by: Perry Yuan <perry.yuan@amd.com>
---
Documentation/admin-guide/pm/amd-pstate.rst | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/Documentation/admin-guide/pm/amd-pstate.rst b/Documentation/admin-guide/pm/amd-pstate.rst
index 1e0d101b020a..2695feec1baa 100644
--- a/Documentation/admin-guide/pm/amd-pstate.rst
+++ b/Documentation/admin-guide/pm/amd-pstate.rst
@@ -299,6 +299,10 @@ module which supports the new AMD P-States mechanism on most of the future AMD
platforms. The AMD P-States mechanism is the more performance and energy
efficiency frequency management method on AMD processors.

+When users attempt to switch from the acpi-cpufreq driver to the amd-pstate driver's working mode,
+it is recommended to reboot the system. This is to ensure that any low-level power management
+control states are properly switched to pstate control. By rebooting, the firmware can initialize
+with optimal power states, reducing the likelihood of unexpected issues.

``amd-pstate`` Driver Operation Modes
======================================
--
2.34.1