linux-kernel - [PATCH v1 02/12] soc: qcom: geni-se: Add geni_icc_set_bw

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Message-Id: <20251122050018.283669-3-praveen.talari@oss.qualcomm.com>
Date: Sat, 22 Nov 2025 10:30:08 +0530
From: Praveen Talari <praveen.talari@....qualcomm.com>
To: Andi Shyti <andi.shyti@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Mukesh Kumar Savaliya <mukesh.savaliya@....qualcomm.com>,
        Viken Dadhaniya <viken.dadhaniya@....qualcomm.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Praveen Talari <praveen.talari@....qualcomm.com>,
        linux-arm-msm@...r.kernel.org, linux-i2c@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: psodagud@...cinc.com, djaggi@...cinc.com, quic_msavaliy@...cinc.com,
        quic_vtanuku@...cinc.com, quic_arandive@...cinc.com,
        quic_shazhuss@...cinc.com,
        Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Subject: [PATCH v1 02/12] soc: qcom: geni-se: Add geni_icc_set_bw_ab() function

Add a new function geni_icc_set_bw_ab() that allows callers to set
average bandwidth values for all ICC (Interconnect) paths in a single
call. This function takes separate parameters for core, config, and DDR
average bandwidth values and applies them to the respective ICC paths.

This provides a more convenient API for drivers that need to configure
specific average bandwidth values.

Co-developed-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
Signed-off-by: Praveen Talari <praveen.talari@....qualcomm.com>
---
 drivers/soc/qcom/qcom-geni-se.c  | 22 ++++++++++++++++++++++
 include/linux/soc/qcom/geni-se.h |  1 +
 2 files changed, 23 insertions(+)

diff --git a/drivers/soc/qcom/qcom-geni-se.c b/drivers/soc/qcom/qcom-geni-se.c
index b6167b968ef6..b0542f836453 100644
--- a/drivers/soc/qcom/qcom-geni-se.c
+++ b/drivers/soc/qcom/qcom-geni-se.c
@@ -946,6 +946,28 @@ int geni_icc_set_bw(struct geni_se *se)
 }
 EXPORT_SYMBOL_GPL(geni_icc_set_bw);
 
+/**
+ * geni_icc_set_bw_ab() - Set average bandwidth for all ICC paths and apply
+ * @se:		Pointer to the concerned serial engine.
+ * @core_ab:	Average bandwidth in kBps for GENI_TO_CORE path.
+ * @cfg_ab:	Average bandwidth in kBps for CPU_TO_GENI path.
+ * @ddr_ab:	Average bandwidth in kBps for GENI_TO_DDR path.
+ *
+ * Sets bandwidth values for all ICC paths and applies them. DDR path is
+ * optional and only set if it exists.
+ *
+ * Return: 0 on success, negative error code on failure.
+ */
+int geni_icc_set_bw_ab(struct geni_se *se, u32 core_ab, u32 cfg_ab, u32 ddr_ab)
+{
+	se->icc_paths[GENI_TO_CORE].avg_bw = core_ab;
+	se->icc_paths[CPU_TO_GENI].avg_bw = cfg_ab;
+	se->icc_paths[GENI_TO_DDR].avg_bw = ddr_ab;
+
+	return geni_icc_set_bw(se);
+}
+EXPORT_SYMBOL_GPL(geni_icc_set_bw_ab);
+
 void geni_icc_set_tag(struct geni_se *se, u32 tag)
 {
 	int i;
diff --git a/include/linux/soc/qcom/geni-se.h b/include/linux/soc/qcom/geni-se.h
index 0a984e2579fe..980aabea2157 100644
--- a/include/linux/soc/qcom/geni-se.h
+++ b/include/linux/soc/qcom/geni-se.h
@@ -528,6 +528,7 @@ void geni_se_rx_dma_unprep(struct geni_se *se, dma_addr_t iova, size_t len);
 int geni_icc_get(struct geni_se *se, const char *icc_ddr);
 
 int geni_icc_set_bw(struct geni_se *se);
+int geni_icc_set_bw_ab(struct geni_se *se, u32 core_ab, u32 cfg_ab, u32 ddr_ab);
 void geni_icc_set_tag(struct geni_se *se, u32 tag);
 
 int geni_icc_enable(struct geni_se *se);
-- 
2.34.1