drm/msm: add rd logging debugfs
To ease debugging, add debugfs file which can be cat/tail'd to log
submits, along with fence #. If GPU hangs, you can look at 'gpu'
debugfs file to find last completed fence and current register state,
and compare with logged rd file to narrow down the DRAW_INDX which
triggered the GPU hang.
Signed-off-by: Rob Clark <robdclark@gmail.com>
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 50ec1be..929f573 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -299,6 +299,10 @@
priv->fbdev = msm_fbdev_init(dev);
#endif
+ ret = msm_debugfs_late_init(dev);
+ if (ret)
+ goto fail;
+
drm_kms_helper_poll_init(dev);
return 0;
@@ -531,6 +535,35 @@
{ "fb", show_locked, 0, msm_fb_show },
};
+static int late_init_minor(struct drm_minor *minor)
+{
+ int ret;
+
+ if (!minor)
+ return 0;
+
+ ret = msm_rd_debugfs_init(minor);
+ if (ret) {
+ dev_err(minor->dev->dev, "could not install rd debugfs\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+int msm_debugfs_late_init(struct drm_device *dev)
+{
+ int ret;
+ ret = late_init_minor(dev->primary);
+ if (ret)
+ return ret;
+ ret = late_init_minor(dev->render);
+ if (ret)
+ return ret;
+ ret = late_init_minor(dev->control);
+ return ret;
+}
+
static int msm_debugfs_init(struct drm_minor *minor)
{
struct drm_device *dev = minor->dev;
@@ -545,13 +578,16 @@
return ret;
}
- return ret;
+ return 0;
}
static void msm_debugfs_cleanup(struct drm_minor *minor)
{
drm_debugfs_remove_files(msm_debugfs_list,
ARRAY_SIZE(msm_debugfs_list), minor);
+ if (!minor->dev->dev_private)
+ return;
+ msm_rd_debugfs_cleanup(minor);
}
#endif