Add support for handling D-state notify for MHI EPF.
Signed-off-by: Krishna chaitanya chundru <quic_krichai@xxxxxxxxxxx>
---
drivers/pci/endpoint/functions/pci-epf-mhi.c | 11 +++++++++++
include/linux/mhi_ep.h | 3 +++
2 files changed, 14 insertions(+)
diff --git a/drivers/pci/endpoint/functions/pci-epf-mhi.c b/drivers/pci/endpoint/functions/pci-epf-mhi.c
index 7d070b1def11..6de9014e6e53 100644
--- a/drivers/pci/endpoint/functions/pci-epf-mhi.c
+++ b/drivers/pci/endpoint/functions/pci-epf-mhi.c
@@ -863,6 +863,16 @@ static int pci_epf_mhi_bus_master_enable(struct pci_epf *epf)
return 0;
}
+static int pci_epf_mhi_dstate_notify(struct pci_epf *epf, pci_power_t state)
+{
+ struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf);
+ struct mhi_ep_cntrl *mhi_cntrl = &epf_mhi->mhi_cntrl;
+
+ mhi_cntrl->dstate = state;
+
+ return 0;
+}
+
static int pci_epf_mhi_bind(struct pci_epf *epf)
{
struct pci_epf_mhi *epf_mhi = epf_get_drvdata(epf);
@@ -921,6 +931,7 @@ static const struct pci_epc_event_ops pci_epf_mhi_event_ops = {
.link_up = pci_epf_mhi_link_up,
.link_down = pci_epf_mhi_link_down,
.bus_master_enable = pci_epf_mhi_bus_master_enable,
+ .dstate_notify = pci_epf_mhi_dstate_notify,
};
static int pci_epf_mhi_probe(struct pci_epf *epf,
diff --git a/include/linux/mhi_ep.h b/include/linux/mhi_ep.h
index 7b40fc8cbe77..7c9e5895ea2c 100644
--- a/include/linux/mhi_ep.h
+++ b/include/linux/mhi_ep.h
@@ -8,6 +8,7 @@
#include <linux/dma-direction.h>
#include <linux/mhi.h>
+#include <linux/pci.h>
#define MHI_EP_DEFAULT_MTU 0x8000
@@ -167,6 +168,8 @@ struct mhi_ep_cntrl {
enum mhi_state mhi_state;
+ pci_power_t dstate;
+
u32 max_chan;
u32 mru;
u32 event_rings;
--
2.42.0
