Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 8bd99ba7 authored by Bhaumik Bhatt's avatar Bhaumik Bhatt
Browse files

mhi: core: add prints for votes and a debugfs vote entry 



Add a debugfs entry to print out votes from all the MHI client
devices.

Change-Id: I6391aee59a4a4e560cfb0bd16e83bf146c19c081
Signed-off-by: default avatarBhaumik Bhatt <bbhatt@codeaurora.org>
parent 5f976439

drivers/bus/mhi/core/mhi_init.c

+13 −0
Original line number Diff line number Diff line
@@ -352,6 +352,11 @@ static int mhi_init_debugfs_mhi_chan_open(struct inode *inode, struct file *fp) 
	return single_open(fp, mhi_debugfs_mhi_chan_show, inode->i_private);

}



static int mhi_init_debugfs_mhi_vote_open(struct inode *inode, struct file *fp)

{

	return single_open(fp, mhi_debugfs_mhi_vote_show, inode->i_private);

}



static const struct file_operations debugfs_state_ops = {

	.open = mhi_init_debugfs_mhi_states_open,

	.release = single_release,
@@ -370,6 +375,12 @@ static const struct file_operations debugfs_chan_ops = { 
	.read = seq_read,

};



static const struct file_operations debugfs_vote_ops = {

	.open = mhi_init_debugfs_mhi_vote_open,

	.release = single_release,

	.read = seq_read,

};



DEFINE_DEBUGFS_ATTRIBUTE(debugfs_trigger_reset_fops, NULL,

			 mhi_debugfs_trigger_reset, "%llu\n");
@@ -395,6 +406,8 @@ void mhi_init_debugfs(struct mhi_controller *mhi_cntrl) 
				   &debugfs_ev_ops);

	debugfs_create_file_unsafe("chan", 0444, dentry, mhi_cntrl,

				   &debugfs_chan_ops);

	debugfs_create_file_unsafe("vote", 0444, dentry, mhi_cntrl,

				   &debugfs_vote_ops);

	debugfs_create_file_unsafe("reset", 0444, dentry, mhi_cntrl,

				   &debugfs_trigger_reset_fops);

	mhi_cntrl->dentry = dentry;

drivers/bus/mhi/core/mhi_internal.h

+1 −0
Original line number Diff line number Diff line
@@ -752,6 +752,7 @@ extern struct mhi_bus mhi_bus; 
struct mhi_controller *find_mhi_controller_by_name(const char *name);



/* debug fs related functions */

int mhi_debugfs_mhi_vote_show(struct seq_file *m, void *d);

int mhi_debugfs_mhi_chan_show(struct seq_file *m, void *d);

int mhi_debugfs_mhi_event_show(struct seq_file *m, void *d);

int mhi_debugfs_mhi_states_show(struct seq_file *m, void *d);

drivers/bus/mhi/core/mhi_main.c

+43 −0
Original line number Diff line number Diff line
@@ -2270,6 +2270,49 @@ int mhi_debugfs_mhi_chan_show(struct seq_file *m, void *d) 
	return 0;

}



/* show bus/device votes for a specific device */

int mhi_device_vote_show(struct device *dev, void *data)

{

	struct mhi_device *mhi_dev;

	struct mhi_controller *mhi_cntrl;



	if (dev->bus != &mhi_bus_type)

		return 0;



	mhi_dev = to_mhi_device(dev);

	mhi_cntrl = mhi_dev->mhi_cntrl;



	/* we dont care about timesync or similar special devices */

	if (mhi_dev->dev_type == MHI_TIMESYNC_TYPE)

		return 0;



	seq_printf((struct seq_file *)data, "%s: device:%u, bus:%u\n",

		   mhi_dev->chan_name, atomic_read(&mhi_dev->dev_vote),

		   atomic_read(&mhi_dev->bus_vote));



	return 0;

}



int mhi_debugfs_mhi_vote_show(struct seq_file *m, void *d)

{

	struct mhi_controller *mhi_cntrl = m->private;

	struct mhi_device *mhi_dev;



	if (!mhi_cntrl)

		return 0;



	mhi_dev = mhi_cntrl->mhi_dev;



	seq_printf(m, "At %llu ns:\n", sched_clock());

	seq_printf(m, "%s: device:%u, bus:%u\n", mhi_dev->chan_name,

		   atomic_read(&mhi_dev->dev_vote),

		   atomic_read(&mhi_dev->bus_vote));



	device_for_each_child(mhi_cntrl->dev, m, mhi_device_vote_show);



	return 0;

}



/* move channel to start state */

int mhi_prepare_for_transfer(struct mhi_device *mhi_dev)

{