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

Signed-off-by: Rob Clark <robdclark@chromium.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20211215174524.1742389-4-robdclark@gmail.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Rob Clark 2021-12-15 09:45:08 -08:00
parent 59871211c6
commit c176055588
1 changed files with 75 additions and 0 deletions
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75
drivers/gpu/drm/msm/msm_debugfs.c
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@ -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);