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Commit 4018bcbb authored Jun 28, 2019 by Sujeev Dias

mhi: core: notify clients whenever device flow control status changes



MHI clients needs notification immediately when device flow control
status (DTR, RTS) changes.

CRs-Fixed: 2466740
Change-Id: Ifecded159fd7936f4d265d65e9c2c16c32c7b19c
Signed-off-by: Sujeev Dias <sdias@codeaurora.org>

parent 3236b8ea

drivers/bus/mhi/core/mhi_dtr.c

+4 −1

Original line number	Diff line number	Diff line
		// SPDX-License-Identifier: GPL-2.0-only
		/* Copyright (c) 2018, The Linux Foundation. All rights reserved.*/
		/* Copyright (c) 2018-2019, The Linux Foundation. All rights reserved.*/

		#include <linux/debugfs.h>
		#include <linux/device.h>
		@@ -164,6 +164,9 @@ static void mhi_dtr_dl_xfer_cb(struct mhi_device *mhi_dev,
		if (dtr_msg->msg & CTRL_MSG_RI)
		mhi_dev->tiocm \|= TIOCM_RI;
		spin_unlock_irq(res_lock);

		/* Notify the update */
		mhi_notify(mhi_dev, MHI_CB_DTR_SIGNAL);
		}

		static void mhi_dtr_ul_xfer_cb(struct mhi_device *mhi_dev,

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

+1 −0

Original line number	Diff line number	Diff line
		@@ -2479,6 +2479,7 @@ static void ipa_mpm_mhi_status_cb(struct mhi_device *mhi_dev,
		case MHI_CB_FATAL_ERROR:
		case MHI_CB_BW_REQ:
		case MHI_CB_EE_MISSION_MODE:
		case MHI_CB_DTR_SIGNAL:
		IPA_MPM_ERR("unexpected event %d\n", mhi_cb);
		break;
		}

include/linux/mhi.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@ struct mhi_buf_info;
		* enum MHI_CB - MHI callback
		* @MHI_CB_IDLE: MHI entered idle state
		* @MHI_CB_PENDING_DATA: New data available for client to process
		* @MHI_CB_DTR_SIGNAL: DTR signaling update
		* @MHI_CB_LPM_ENTER: MHI host entered low power mode
		* @MHI_CB_LPM_EXIT: MHI host about to exit low power mode
		* @MHI_CB_EE_RDDM: MHI device entered RDDM execution enviornment
		@@ -28,6 +29,7 @@ struct mhi_buf_info;
		enum MHI_CB {
		MHI_CB_IDLE,
		MHI_CB_PENDING_DATA,
		MHI_CB_DTR_SIGNAL,
		MHI_CB_LPM_ENTER,
		MHI_CB_LPM_EXIT,
		MHI_CB_EE_RDDM,