From ace98f847fcb48598e6fb6997839dc33748a4191 Mon Sep 17 00:00:00 2001
From: Mohit Khanna <mkhannaqca@codeaurora.org>
Date: Fri, 21 Feb 2020 12:29:37 -0800
Subject: [PATCH] qcacmn: HIF APIs to prevent/allow low power states

Add HIF APIs to prevent or allow link to go into low power states. The
current implementation uses PLD APIs to make the needed configuration.

Change-Id: I22efb4bcf902f9aff674ed1872f4f23bef508aae
CRs-Fixed: 2602029
---
 hif/inc/hif.h         | 31 +++++++++++++++++++++++++++++++
 hif/src/pcie/if_pci.c | 11 +++++++++++
 2 files changed, 42 insertions(+)

diff --git a/hif/inc/hif.h b/hif/inc/hif.h
index e7f6d7425ad7..56419b1d1841 100644
--- a/hif/inc/hif.h
+++ b/hif/inc/hif.h
@@ -1202,6 +1202,37 @@ int hif_force_wake_release(struct hif_opaque_softc *handle)
 }
 #endif /* FORCE_WAKE */
 
+#ifdef FEATURE_HAL_DELAYED_REG_WRITE
+/**
+ * hif_prevent_link_low_power_states() - Prevent from going to low power states
+ * @hif - HIF opaque context
+ *
+ * Return: 0 on success. Error code on failure.
+ */
+int hif_prevent_link_low_power_states(struct hif_opaque_softc *hif);
+
+/**
+ * hif_allow_link_low_power_states() - Allow link to go to low power states
+ * @hif - HIF opaque context
+ *
+ * Return: None
+ */
+void hif_allow_link_low_power_states(struct hif_opaque_softc *hif);
+
+#else
+
+static inline
+int hif_prevent_link_low_power_states(struct hif_opaque_softc *hif)
+{
+	return 0;
+}
+
+static inline
+void hif_allow_link_low_power_states(struct hif_opaque_softc *hif)
+{
+}
+#endif
+
 void *hif_get_dev_ba(struct hif_opaque_softc *hif_handle);
 
 /**
diff --git a/hif/src/pcie/if_pci.c b/hif/src/pcie/if_pci.c
index 4ff0c6ba3da4..56b346564b44 100644
--- a/hif/src/pcie/if_pci.c
+++ b/hif/src/pcie/if_pci.c
@@ -4844,3 +4844,14 @@ void hif_print_pci_stats(struct hif_pci_softc *pci_handle)
 }
 #endif /* FORCE_WAKE */
 
+#ifdef FEATURE_HAL_DELAYED_REG_WRITE
+int hif_prevent_link_low_power_states(struct hif_opaque_softc *hif)
+{
+	return pld_prevent_l1(HIF_GET_SOFTC(hif)->qdf_dev->dev);
+}
+
+void hif_allow_link_low_power_states(struct hif_opaque_softc *hif)
+{
+	pld_allow_l1(HIF_GET_SOFTC(hif)->qdf_dev->dev);
+}
+#endif