[PATCH 3/3] remoteproc: qcom_q6v5_pas: Add per-PD proxy performance states for Hawi CDSP

[Mukesh Ojha]

The proxy power domain enable path currently requests INT_MAX performance
state for every proxy PD.  While this serves as a "take highest available"
hint, some SoCs require specific per-domain RPMH levels for correct
operation during firmware load rather than a blanket maximum.

Introduce a proxy_pd_performance_states array in qcom_pas_data to allow
each proxy PD to declare its required RPMH performance level explicitly.
Platforms that do not populate this field retain the existing INT_MAX
behaviour.

Also propagate the return value of dev_pm_genpd_set_performance_state()
and emit a warning on failure rather than silently ignoring it.

Add Hawi CDSP remoteproc support using this infrastructure with the
following proxy PD performance states:

  CX:  RPMH_REGULATOR_LEVEL_TURBO
  MXC: RPMH_REGULATOR_LEVEL_TURBO
  NSP: RPMH_REGULATOR_LEVEL_NOM

Signed-off-by: Mukesh Ojha <mukesh.ojha@xxxxxxxxxxxxxxxx>
---
 drivers/remoteproc/qcom_q6v5_pas.c | 43 +++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index 25942200ba03..c270c81e8bb4 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -28,6 +28,7 @@
 #include <linux/soc/qcom/mdt_loader.h>
 #include <linux/soc/qcom/smem.h>
 #include <linux/soc/qcom/smem_state.h>
+#include <dt-bindings/power/qcom,rpmhpd.h>
 
 #include "qcom_common.h"
 #include "qcom_pil_info.h"
@@ -51,6 +52,7 @@ struct qcom_pas_data {
 	bool decrypt_shutdown;
 
 	char **proxy_pd_names;
+	const unsigned int *proxy_pd_performance_states;
 
 	const char *load_state;
 	const char *ssr_name;
@@ -79,6 +81,7 @@ struct qcom_pas {
 	struct regulator *px_supply;
 
 	struct device *proxy_pds[3];
+	const unsigned int *proxy_pd_performance_states;
 
 	int proxy_pd_count;
 
@@ -167,7 +170,17 @@ static int qcom_pas_pds_enable(struct qcom_pas *pas, struct device **pds,
 	int i;
 
 	for (i = 0; i < pd_count; i++) {
-		dev_pm_genpd_set_performance_state(pds[i], INT_MAX);
+		unsigned int state = INT_MAX;
+
+		if (pas->proxy_pd_performance_states)
+			state = pas->proxy_pd_performance_states[i];
+
+		ret = dev_pm_genpd_set_performance_state(pds[i], state);
+		if (ret)
+			dev_warn(pas->dev,
+				 "failed to set proxy PD %d state %u: %d\n",
+				 i, state, ret);
+
 		ret = pm_runtime_get_sync(pds[i]);
 		if (ret < 0) {
 			pm_runtime_put_noidle(pds[i]);
@@ -873,6 +886,7 @@ static int qcom_pas_probe(struct platform_device *pdev)
 	pas->info_name = desc->sysmon_name;
 	pas->smem_host_id = desc->smem_host_id;
 	pas->decrypt_shutdown = desc->decrypt_shutdown;
+	pas->proxy_pd_performance_states = desc->proxy_pd_performance_states;
 	pas->region_assign_idx = desc->region_assign_idx;
 	pas->region_assign_count = min_t(int, MAX_ASSIGN_COUNT, desc->region_assign_count);
 	pas->region_assign_vmid = desc->region_assign_vmid;
@@ -1798,6 +1812,32 @@ static const struct qcom_pas_data glymur_soccp_resource = {
 	.needs_tzmem = true,
 };
 
+static const struct qcom_pas_data hawi_cdsp_resource = {
+	.crash_reason_smem = 601,
+	.firmware_name = "cdsp.mdt",
+	.dtb_firmware_name = "cdsp_dtb.mdt",
+	.pas_id = 18,
+	.dtb_pas_id = 0x25,
+	.minidump_id = 7,
+	.auto_boot = true,
+	.proxy_pd_names = (char*[]){
+		"cx",
+		"mxc",
+		"nsp",
+		NULL
+	},
+	.proxy_pd_performance_states = (const unsigned int[]){
+		RPMH_REGULATOR_LEVEL_TURBO,
+		RPMH_REGULATOR_LEVEL_TURBO,
+		RPMH_REGULATOR_LEVEL_NOM,
+	},
+	.load_state = "cdsp",
+	.ssr_name = "cdsp",
+	.sysmon_name = "cdsp",
+	.ssctl_id = 0x17,
+	.smem_host_id = 5,
+};
+
 static const struct qcom_pas_data eliza_cdsp_resource = {
 	.crash_reason_smem = 601,
 	.firmware_name = "cdsp.mbn",
@@ -1827,6 +1867,7 @@ static const struct of_device_id qcom_pas_of_match[] = {
 	{ .compatible = "qcom,eliza-adsp-pas", .data = &sm8550_adsp_resource },
 	{ .compatible = "qcom,eliza-cdsp-pas", .data = &eliza_cdsp_resource },
 	{ .compatible = "qcom,glymur-soccp-pas", .data = &glymur_soccp_resource },
+	{ .compatible = "qcom,hawi-cdsp-pas", .data = &hawi_cdsp_resource },
 	{ .compatible = "qcom,kaanapali-soccp-pas", .data = &kaanapali_soccp_resource },
 	{ .compatible = "qcom,milos-adsp-pas", .data = &sm8550_adsp_resource },
 	{ .compatible = "qcom,milos-cdsp-pas", .data = &milos_cdsp_resource },
-- 
2.55.0