FROMLIST: soc: qcom: Expose DDR data from SMEM #445
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Most modern Qualcomm platforms (>= SM8150) expose information about the DDR memory present on the system via SMEM. Details from this information is used in various scenarios, such as multimedia drivers configuring the hardware based on the "Highest Bank address Bit" (hbb), or the list of valid frequencies in validation scenarios... Add support for parsing v3-v5 version of the structs. Unforunately, they are not versioned, so some elbow grease is necessary to determine which one is present. See for reference: v3: https://git.codelinaro.org/clo/la/abl/tianocore/edk2/-/commit/1d11897d2cfcc7b85f28ff74c445018dbbecac7a v4: https://git.codelinaro.org/clo/la/abl/tianocore/edk2/-/commit/f6e9aa549260bbc0bdcb156c2b05f48dc5963203 v5: https://git.codelinaro.org/clo/la/abl/tianocore/edk2/-/blob/uefi.lnx.4.0.r31-rel/QcomModulePkg/Include/Protocol/DDRDetails.h?ref_type=heads Link: https://lore.kernel.org/r/20250410-topic-smem_dramc-v2-1-dead15264714@oss.qualcomm.com Reviewed-by: Bjorn Andersson <andersson@kernel.org> Signed-off-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com> Signed-off-by: Vishnu Santhosh <vishnu.santhosh@oss.qualcomm.com>
shashim-quic
approved these changes
Dec 16, 2025
shashim-quic
approved these changes
Dec 16, 2025
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Most modern Qualcomm platforms (>= SM8150) expose information about the DDR memory present on the system via SMEM.
Details from this information is used in various scenarios, such as multimedia drivers configuring the hardware based on the "Highest Bank address Bit" (hbb), or the list of valid frequencies in validation scenarios...
Add support for parsing v3-v5 version of the structs. Unforunately, they are not versioned, so some elbow grease is necessary to determine which one is present. See for reference:
v3: https://git.codelinaro.org/clo/la/abl/tianocore/edk2/-/commit/1d11897d2cfcc7b85f28ff74c445018dbbecac7a
v4: https://git.codelinaro.org/clo/la/abl/tianocore/edk2/-/commit/f6e9aa549260bbc0bdcb156c2b05f48dc5963203
v5: https://git.codelinaro.org/clo/la/abl/tianocore/edk2/-/blob/uefi.lnx.4.0.r31-rel/QcomModulePkg/Include/Protocol/DDRDetails.h?ref_type=heads
Link: https://lore.kernel.org/r/20250410-topic-smem_dramc-v2-1-dead15264714@oss.qualcomm.com
Reviewed-by: Bjorn Andersson andersson@kernel.org