firmware: qcom: scm: Add minidump SRAM support

Browse source

On most Qualcomm SoCs where minidump is supported, a word in always-on
SRAM is shared between the operating system (OS) and boot firmware.
Before DDR is initialized on the warm reset following a crash, firmware
reads this word to decide if minidump is enabled and collect a minidump,
and where to deliver it (USB upload to a host, or save to local
storage). The OS is expected to select one of the destinations.

The SRAM region is described by a 'sram' phandle on the SCM DT node.
If the property is absent the feature is silently disabled, keeping
existing SoCs unaffected.

Expose a 'minidump_dest' module parameter (default: usb) so the user
can select the destination. Only the string names "usb" or "storage"
are accepted.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260624190830.3131112-6-mukesh.ojha@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

...

This commit is contained in:

Mukesh Ojha 2026-06-25 00:38:16 +05:30 • committed by Bjorn Andersson

parent d0a05db99b

commit 7bd52a0d45

1 changed files with 92 additions and 0 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

92

drivers/firmware/qcom/qcom_scm.c

View file