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Commit e7f6aaec authored by Zheng Zhang's avatar Zheng Zhang Committed by Gerrit - the friendly Code Review server
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mdss: move mdp3_dispatch_dma_done to a kthread 



taken from the android opensource with the below commit commit
59cffac1083cdacc9c0a7c859b51d588db9ee7f3

Git-commit: 59cffac1083cdacc9c0a7c859b51d588db9ee7f3

Change-Id: I4a2040824f4177acf3a8a7a8b980be4fa65f676b
Signed-off-by: default avatarBikshapathi Kothapeta <bkotha@codeaurora.org>
Signed-off-by: default avatarSachin Bhayare <sachin.bhayare@codeaurora.org>
parent c97f5cfd

drivers/video/msm/mdss/mdp3_ctrl.c

+18 −3
Original line number Diff line number Diff line
@@ -136,7 +136,7 @@ int mdp3_ctrl_notify(struct mdp3_session_data *ses, int event) 
	return blocking_notifier_call_chain(&ses->notifier_head, event, ses);

}



static void mdp3_dispatch_dma_done(struct work_struct *work)

static void mdp3_dispatch_dma_done(struct kthread_work *work)

{

	struct mdp3_session_data *session;

	int cnt = 0;
@@ -259,7 +259,7 @@ void dma_done_notify_handler(void *arg) 
{

	struct mdp3_session_data *session = (struct mdp3_session_data *)arg;

	atomic_inc(&session->dma_done_cnt);

	schedule_work(&session->dma_done_work);

	queue_kthread_work(&session->worker, &session->dma_done_work);

	complete_all(&session->dma_completion);

}
@@ -2773,6 +2773,7 @@ int mdp3_ctrl_init(struct msm_fb_data_type *mfd) 
	u32 intf_type = MDP3_DMA_OUTPUT_SEL_DSI_VIDEO;

	int rc;

	int splash_mismatch = 0;

	struct sched_param sched = { .sched_priority = 16 };



	pr_info("mdp3_ctrl_init\n");

	rc = mdp3_parse_dt_splash(mfd);
@@ -2798,7 +2799,21 @@ int mdp3_ctrl_init(struct msm_fb_data_type *mfd) 
	}

	mutex_init(&mdp3_session->lock);

	INIT_WORK(&mdp3_session->clk_off_work, mdp3_dispatch_clk_off);

	INIT_WORK(&mdp3_session->dma_done_work, mdp3_dispatch_dma_done);



	init_kthread_worker(&mdp3_session->worker);

	init_kthread_work(&mdp3_session->dma_done_work, mdp3_dispatch_dma_done);



	mdp3_session->thread = kthread_run(kthread_worker_fn, &mdp3_session->worker,

					   "mdp3_dispatch_dma_done");



	if (IS_ERR(mdp3_session->thread)) {

		pr_err("Can't initialize mdp3_dispatch_dma_done thread\n");

		rc = -ENODEV;

		goto init_done;

	}



	sched_setscheduler(mdp3_session->thread, SCHED_FIFO, &sched);



	atomic_set(&mdp3_session->vsync_countdown, 0);

	mutex_init(&mdp3_session->histo_lock);

	mdp3_session->dma = mdp3_get_dma_pipe(MDP3_DMA_CAP_ALL);

drivers/video/msm/mdss/mdp3_ctrl.h

+7 −2
Original line number Diff line number Diff line 
/* Copyright (c) 2013-2014, 2016, The Linux Foundation. All rights reserved.

/* Copyright (c) 2013-2014, 2016-2017 The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and
@@ -18,6 +18,7 @@ 
#include <linux/mutex.h>

#include <linux/completion.h>

#include <linux/timer.h>

#include <linux/kthread.h>



#include "mdp3.h"

#include "mdp3_dma.h"
@@ -51,7 +52,11 @@ struct mdp3_session_data { 
	struct mdp3_buffer_queue bufq_in;

	struct mdp3_buffer_queue bufq_out;

	struct work_struct clk_off_work;

	struct work_struct dma_done_work;



	struct kthread_work dma_done_work;

	struct kthread_worker worker;

	struct task_struct *thread;



	atomic_t dma_done_cnt;

	int histo_status;

	struct mutex histo_lock;