msm: ipa3: Enable holb as part of usb suspend

When USB is suspended there are DL packets on consumer
channel leading to stall. to avoid the stall enabling
the holb as part of suspend and removing it in resume.

Change-Id: I08e2fe248ee675698da16b6df6aec8f109c73608
Signed-off-by: sivakanth vaka <[email protected]>

drivers/platform/msm/ipa/ipa_v3/ipa_client.c

@@ -1570,6 +1570,7 @@ int ipa3_xdci_suspend(u32 ul_clnt_hdl, u32 dl_clnt_hdl,
 	struct ipa_ep_cfg_ctrl ep_cfg_ctrl;
 	u32 holb_max_cnt = ipa3_ctx->uc_ctx.holb_monitor.max_cnt_usb;
 	int res = 0;
+	struct ipa_ep_cfg_holb holb_cfg;
 
 	/* In case of DPL, dl is the DPL channel/client */
 
@@ -1655,6 +1656,14 @@ int ipa3_xdci_suspend(u32 ul_clnt_hdl, u32 dl_clnt_hdl,
 		goto unsuspend_dl_and_exit;
 	}
 
+	/*enable holb to discard the packets*/
+	if (IPA_CLIENT_IS_CONS(dl_ep->client) && !is_dpl) {
+		memset(&holb_cfg, 0, sizeof(holb_cfg));
+		holb_cfg.en = IPA_HOLB_TMR_EN;
+		holb_cfg.tmr_val = IPA_HOLB_TMR_VAL_4_5;
+		result = ipa3_cfg_ep_holb(dl_clnt_hdl, &holb_cfg);
+	}
+
 	/* Stop DL channel */
 	result = ipa3_stop_gsi_channel(dl_clnt_hdl);
 	if (result) {
@@ -1692,6 +1701,13 @@ start_dl_and_exit:
 					dl_ep->gsi_chan_hdl);
 	}
 	ipa3_start_gsi_debug_monitor(dl_clnt_hdl);
+	/*disable holb to allow packets*/
+	if (IPA_CLIENT_IS_CONS(dl_ep->client) && !is_dpl) {
+		memset(&holb_cfg, 0, sizeof(holb_cfg));
+		holb_cfg.en = IPA_HOLB_TMR_DIS;
+		holb_cfg.tmr_val = 0;
+		ipa3_cfg_ep_holb(dl_clnt_hdl, &holb_cfg);
+	}
 unsuspend_dl_and_exit:
 	if (ipa3_ctx->ipa_hw_type < IPA_HW_v4_0) {
 		/* Unsuspend the DL EP */
@@ -1762,6 +1778,7 @@ int ipa3_xdci_resume(u32 ul_clnt_hdl, u32 dl_clnt_hdl, bool is_dpl)
 	struct ipa_ep_cfg_ctrl ep_cfg_ctrl;
 	int result;
 	u32 holb_max_cnt = ipa3_ctx->uc_ctx.holb_monitor.max_cnt_usb;
+	struct ipa_ep_cfg_holb holb_cfg;
 
 	/* In case of DPL, dl is the DPL channel/client */
 
@@ -1790,6 +1807,13 @@ int ipa3_xdci_resume(u32 ul_clnt_hdl, u32 dl_clnt_hdl, bool is_dpl)
 	gsi_res = gsi_start_channel(dl_ep->gsi_chan_hdl);
 	if (gsi_res != GSI_STATUS_SUCCESS)
 		IPAERR("Error starting DL channel: %d\n", gsi_res);
+	/*disable holb to allow packets*/
+	if (IPA_CLIENT_IS_CONS(dl_ep->client) && !is_dpl) {
+		memset(&holb_cfg, 0, sizeof(holb_cfg));
+		holb_cfg.en = IPA_HOLB_TMR_DIS;
+		holb_cfg.tmr_val = 0;
+		ipa3_cfg_ep_holb(dl_clnt_hdl, &holb_cfg);
+	}
 	if (!is_dpl) {
 		result = ipa3_uc_client_add_holb_monitor(dl_ep->gsi_chan_hdl,
 				HOLB_MONITOR_MASK,

drivers/platform/msm/ipa/ipa_v3/ipa_i.h

@@ -62,6 +62,7 @@
 #define IPA_UC_FINISH_MAX 6
 #define IPA_UC_WAIT_MIN_SLEEP 1000
 #define IPA_UC_WAII_MAX_SLEEP 1200
+#define IPA_HOLB_TMR_VAL_4_5 31
 /*
  * The transport descriptor size was changed to GSI_CHAN_RE_SIZE_16B, but
  * IPA users still use sps_iovec size as FIFO element size.