Commit c1760555 authored by Rob Clark's avatar Rob Clark
Browse files

drm/msm/debugfs: Add display/kms state snapshot 



Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211215174524.1742389-4-robdclark@gmail.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: default avatarRob Clark <robdclark@chromium.org>
parent 59871211

drivers/gpu/drm/msm/msm_debugfs.c

+75 −0
Original line number Diff line number Diff line
@@ -15,6 +15,11 @@ 
#include "msm_gpu.h"

#include "msm_kms.h"

#include "msm_debugfs.h"

#include "disp/msm_disp_snapshot.h"



/*

 * GPU Snapshot:

 */



struct msm_gpu_show_priv {

	struct msm_gpu_state *state;
@@ -109,6 +114,73 @@ static const struct file_operations msm_gpu_fops = { 
	.release = msm_gpu_release,

};



/*

 * Display Snapshot:

 */



static int msm_kms_show(struct seq_file *m, void *arg)

{

	struct drm_printer p = drm_seq_file_printer(m);

	struct msm_disp_state *state = m->private;



	msm_disp_state_print(state, &p);



	return 0;

}



static int msm_kms_release(struct inode *inode, struct file *file)

{

	struct seq_file *m = file->private_data;

	struct msm_disp_state *state = m->private;



	msm_disp_state_free(state);



	return single_release(inode, file);

}



static int msm_kms_open(struct inode *inode, struct file *file)

{

	struct drm_device *dev = inode->i_private;

	struct msm_drm_private *priv = dev->dev_private;

	struct msm_disp_state *state;

	int ret;



	if (!priv->kms)

		return -ENODEV;



	ret = mutex_lock_interruptible(&priv->kms->dump_mutex);

	if (ret)

		return ret;



	state = msm_disp_snapshot_state_sync(priv->kms);



	mutex_unlock(&priv->kms->dump_mutex);



	if (IS_ERR(state)) {

		return PTR_ERR(state);

	}



	ret = single_open(file, msm_kms_show, state);

	if (ret) {

		msm_disp_state_free(state);

		return ret;

	}



	return 0;

}



static const struct file_operations msm_kms_fops = {

	.owner = THIS_MODULE,

	.open = msm_kms_open,

	.read = seq_read,

	.llseek = seq_lseek,

	.release = msm_kms_release,

};



/*

 * Other debugfs:

 */



static unsigned long last_shrink_freed;



static int
@@ -239,6 +311,9 @@ void msm_debugfs_init(struct drm_minor *minor) 
	debugfs_create_file("gpu", S_IRUSR, minor->debugfs_root,

		dev, &msm_gpu_fops);



	debugfs_create_file("kms", S_IRUSR, minor->debugfs_root,

		dev, &msm_kms_fops);



	debugfs_create_u32("hangcheck_period_ms", 0600, minor->debugfs_root,

		&priv->hangcheck_period);