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Subject[PATCH v2 3/3] drm/msm/debugfs: Add display/kms state snapshot
Date
From: Rob Clark <robdclark@chromium.org>

Signed-off-by: Rob Clark <robdclark@chromium.org>
---
v2: Drop unneeded msm_kms_show_priv [Dmitry B]

drivers/gpu/drm/msm/msm_debugfs.c | 75 +++++++++++++++++++++++++++++++
1 file changed, 75 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_debugfs.c b/drivers/gpu/drm/msm/msm_debugfs.c
index 956b1efc3721..0804c31e8962 100644
--- a/drivers/gpu/drm/msm/msm_debugfs.c
+++ b/drivers/gpu/drm/msm/msm_debugfs.c
@@ -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);

--
2.33.1
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