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Commit c17f1783 authored by Gauri Joshi's avatar Gauri Joshi
Browse files

msm: mhi_dev: Add an option to not timeout waiting for M0 



On certain platforms host might take a long time to send M0
to device. Only modified msm files in this commit.

Change-Id: I8c5f07a7926e01afa84a983ef98721749787d2da
Signed-off-by: default avatarSiva Kumar Akkireddi <sivaa@codeaurora.org>
Signed-off-by: default avatarGauri Joshi <gaurjosh@codeaurora.org>
parent 84a55b41

drivers/platform/msm/mhi_dev/mhi.c

+5 −1
Original line number Diff line number Diff line
@@ -3355,7 +3355,8 @@ static void mhi_dev_enable(struct work_struct *work) 
			"Cleared reset before waiting for M0\n");

	}



	while (state != MHI_DEV_M0_STATE && max_cnt < MHI_SUSPEND_TIMEOUT) {

	while (state != MHI_DEV_M0_STATE &&

		((max_cnt < MHI_SUSPEND_TIMEOUT) || mhi->no_m0_timeout)) {

		/* Wait for Host to set the M0 state */

		msleep(MHI_SUSPEND_MIN);

		rc = mhi_dev_mmio_get_mhi_state(mhi, &state, &mhi_reset);
@@ -3624,6 +3625,9 @@ static int get_device_tree_data(struct platform_device *pdev) 
	mhi->enable_m2 = of_property_read_bool((&pdev->dev)->of_node,

				"qcom,enable-m2");



	mhi->no_m0_timeout = of_property_read_bool((&pdev->dev)->of_node,

		"qcom,no-m0-timeout");



	mhi_log(MHI_MSG_VERBOSE, "acquiring wakelock\n");



	return 0;

drivers/platform/msm/mhi_dev/mhi.h

+4 −0
Original line number Diff line number Diff line
@@ -595,9 +595,13 @@ struct mhi_dev { 
	/*Register for interrupt*/

	bool				mhi_int;

	bool				mhi_int_en;



	/* Enable M2 autonomous mode from MHI */

	bool				enable_m2;



	/* Dont timeout waiting for M0 */

	bool				no_m0_timeout;



	/* Registered client callback list */

	struct list_head		client_cb_list;

	/* Tx, Rx DMA channels */