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arm64: dts: qcom: x1e80100: Add opp-level to indicate PCIe data rates

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The existing OPP table for PCIe is shared across different link
configurations such as data rates 8GT/s x2 and 16GT/s x1. These
configurations often operate at the same frequency, allowing them
to reuse the same OPP entries. However, 8GT/s and 16 GT/s may have
different RPMh votes which cannot be represented accurately when
sharing a single OPP.

To address this, introduce an `opp-level` to indicate the PCIe data
rate and uniquely differentiate OPP entries even when the frequenc
is the same.

Although this platform does not currently suffer from this issue, the
change is introduced to support unification across platforms.

Append the opp level to name of the opp node to indicate both frequency
and level.

Signed-off-by: Krishna Chaitanya Chundru <krishna.chundru@oss.qualcomm.com>
Acked-by: Manivannan Sadhasivam <mani@kernel.org>
Link: https://lore.kernel.org/r/20251013-opp_pcie-v5-4-eb64db2b4bd3@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
This commit is contained in:
Krishna Chaitanya Chundru
2025-10-13 16:23:31 +05:30
committed by Bjorn Andersson
parent 860d514f09
commit cfd8f45ddf
1 changed files with 78 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files

98
arch/arm64/boot/dts/qcom/hamoa.dtsi
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@@ -3267,74 +3267,132 @@
pcie3_opp_table: opp-table {
compatible = "operating-points-v2";
/* GEN 1 x1 */
opp-2500000 {
/* 2.5GT/s x1 */
opp-2500000-1 {
opp-hz = /bits/ 64 <2500000>;
required-opps = <&rpmhpd_opp_low_svs>;
opp-peak-kBps = <250000 1>;
opp-level = <1>;
};
/* GEN 1 x2 and GEN 2 x1 */
opp-5000000 {
/* 2.5 GT/s x2 */
opp-5000000-1 {
opp-hz = /bits/ 64 <5000000>;
required-opps = <&rpmhpd_opp_low_svs>;
opp-peak-kBps = <500000 1>;
opp-level = <1>;
};
/* GEN 1 x4 and GEN 2 x2 */
opp-10000000 {
/* 2.5 GT/s x4 */
opp-10000000-1 {
opp-hz = /bits/ 64 <10000000>;
required-opps = <&rpmhpd_opp_low_svs>;
opp-peak-kBps = <1000000 1>;
opp-level = <1>;
};
/* GEN 1 x8 and GEN 2 x4 */
opp-20000000 {
/* 2.5 GT/s x8 */
opp-20000000-1 {
opp-hz = /bits/ 64 <20000000>;
required-opps = <&rpmhpd_opp_low_svs>;
opp-peak-kBps = <2000000 1>;
opp-level = <1>;
};
/* GEN 2 x8 */
opp-40000000 {
/* 5 GT/s x1 */
opp-5000000-2 {
opp-hz = /bits/ 64 <5000000>;
required-opps = <&rpmhpd_opp_low_svs>;
opp-peak-kBps = <500000 1>;
opp-level = <2>;
};
/* 5 GT/s x2 */
opp-10000000-2 {
opp-hz = /bits/ 64 <10000000>;
required-opps = <&rpmhpd_opp_low_svs>;
opp-peak-kBps = <1000000 1>;
opp-level = <2>;
};
/* 5 GT/s x4 */
opp-20000000-2 {
opp-hz = /bits/ 64 <20000000>;
required-opps = <&rpmhpd_opp_low_svs>;
opp-peak-kBps = <2000000 1>;
opp-level = <2>;
};
/* 5 GT/s x8 */
opp-40000000-2 {
opp-hz = /bits/ 64 <40000000>;
required-opps = <&rpmhpd_opp_low_svs>;
opp-peak-kBps = <4000000 1>;
opp-level = <2>;
};
/* GEN 3 x1 */
opp-8000000 {
/* 8 GT/s x1 */
opp-8000000-3 {
opp-hz = /bits/ 64 <8000000>;
required-opps = <&rpmhpd_opp_svs>;
opp-peak-kBps = <984500 1>;
opp-level = <3>;
};
/* GEN 3 x2 and GEN 4 x1 */
opp-16000000 {
/* 8 GT/s x2 */
opp-16000000-3 {
opp-hz = /bits/ 64 <16000000>;
required-opps = <&rpmhpd_opp_svs>;
opp-peak-kBps = <1969000 1>;
opp-level = <3>;
};
/* GEN 3 x4 and GEN 4 x2 */
opp-32000000 {
/* 8 GT/s x4 */
opp-32000000-3 {
opp-hz = /bits/ 64 <32000000>;
required-opps = <&rpmhpd_opp_svs>;
opp-peak-kBps = <3938000 1>;
opp-level = <3>;
};
/* GEN 3 x8 and GEN 4 x4 */
opp-64000000 {
/* 8 GT/s x8 */
opp-64000000-3 {
opp-hz = /bits/ 64 <64000000>;
required-opps = <&rpmhpd_opp_svs>;
opp-peak-kBps = <7876000 1>;
opp-level = <3>;
};
/* GEN 4 x8 */
opp-128000000 {
/* 16 GT/s x1 */
opp-16000000-4 {
opp-hz = /bits/ 64 <16000000>;
required-opps = <&rpmhpd_opp_svs>;
opp-peak-kBps = <1969000 1>;
opp-level = <4>;
};
/* 16 GT/s x2 */
opp-32000000-4 {
opp-hz = /bits/ 64 <32000000>;
required-opps = <&rpmhpd_opp_svs>;
opp-peak-kBps = <3938000 1>;
opp-level = <4>;
};
/* 16 GT/s x4 */
opp-64000000-4 {
opp-hz = /bits/ 64 <64000000>;
required-opps = <&rpmhpd_opp_svs>;
opp-peak-kBps = <7876000 1>;
opp-level = <4>;
};
/* 16 GT/s x8 */
opp-128000000-4 {
opp-hz = /bits/ 64 <128000000>;
required-opps = <&rpmhpd_opp_svs>;
opp-peak-kBps = <15753000 1>;
opp-level = <4>;
};
};