AMD MP2 STB function provides a data buffer used to log debug information
about the system execution during S2Idle suspend/resume.
A data buffer known as the STB (Smart Trace Buffer) is a circular buffer
which is a low-level log to assist in debugging by providing insights
into any potential hangs or stalls that may occur during the S2Idle
suspend/resume processes.
The current PMC driver retrieves STB data from MP1, but there can be
scenarios where MP1 might hang or become unresponsive, leading to the
loss of critical data present in the STB buffer. This defeats the purpose
of the STB buffer, which was originally meant to help identify system
failures.
This feature creates stb_read_previous_boot debugfs allows users to
retrieve the STB log from MP2 specifically from the last occurrence of
the S2Idle suspend/resume. A userspace daemon can access STB log of last
S2Idle suspend/resume which can help to troubleshoot potential issues
related to hangs or stalls during the S2Idle suspend/resume sequence.
Reviewed-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Link: https://lore.kernel.org/r/20240404090702.325838-1-Basavaraj.Natikar@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
The latest platforms use a different SMU message port(0x938) from the one
currently being used (0x538). Make code changes to adapt to this new
information.
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20231228102104.1785383-7-Shyam-sundar.S-k@amd.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Other platforms may need to disable keyboard wakeup besides Cezanne,
so move the detection into amd_pmc_quirks_init() where it may be applied
to multiple platforms.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20231212045006.97581-4-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
The platform defines will be used by the quirks in the future,
so move them to the common header to allow use by both source
files.
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20231212045006.97581-2-mario.limonciello@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
With latest commits having PMC code spread across multiple files, it would
be easier to maintain them in a separate directory under amd/pmc.
Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20230811112116.2279419-2-Shyam-sundar.S-k@amd.com
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
2023-08-23 17:31:26 +02:00
Renamed from drivers/platform/x86/amd/pmc.h (Browse further)
