Commit fede5c91 authored by Eric Anholt's avatar Eric Anholt Committed by Dave Airlie
Browse files

drm: Add a debug node for vblank state.


Signed-off-by: default avatarEric Anholt <eric@anholt.net>
Signed-off-by: default avatarDave Airlie <airlied@linux.ie>
parent f51c5b6e
......@@ -116,6 +116,9 @@ void drm_vblank_cleanup(struct drm_device *dev)
dev->num_crtcs, DRM_MEM_DRIVER);
drm_free(dev->last_vblank, sizeof(*dev->last_vblank) * dev->num_crtcs,
DRM_MEM_DRIVER);
drm_free(dev->last_vblank_wait,
sizeof(*dev->last_vblank_wait) * dev->num_crtcs,
DRM_MEM_DRIVER);
drm_free(dev->vblank_inmodeset, sizeof(*dev->vblank_inmodeset) *
dev->num_crtcs, DRM_MEM_DRIVER);
......@@ -161,6 +164,11 @@ int drm_vblank_init(struct drm_device *dev, int num_crtcs)
if (!dev->last_vblank)
goto err;
dev->last_vblank_wait = drm_calloc(num_crtcs, sizeof(u32),
DRM_MEM_DRIVER);
if (!dev->last_vblank_wait)
goto err;
dev->vblank_inmodeset = drm_calloc(num_crtcs, sizeof(int),
DRM_MEM_DRIVER);
if (!dev->vblank_inmodeset)
......@@ -642,6 +650,7 @@ int drm_wait_vblank(struct drm_device *dev, void *data,
} else {
DRM_DEBUG("waiting on vblank count %d, crtc %d\n",
vblwait->request.sequence, crtc);
dev->last_vblank_wait[crtc] = vblwait->request.sequence;
DRM_WAIT_ON(ret, dev->vbl_queue[crtc], 3 * DRM_HZ,
((drm_vblank_count(dev, crtc)
- vblwait->request.sequence) <= (1 << 23)));
......
......@@ -49,6 +49,8 @@ static int drm_queues_info(char *buf, char **start, off_t offset,
int request, int *eof, void *data);
static int drm_bufs_info(char *buf, char **start, off_t offset,
int request, int *eof, void *data);
static int drm_vblank_info(char *buf, char **start, off_t offset,
int request, int *eof, void *data);
static int drm_gem_name_info(char *buf, char **start, off_t offset,
int request, int *eof, void *data);
static int drm_gem_object_info(char *buf, char **start, off_t offset,
......@@ -72,6 +74,7 @@ static struct drm_proc_list {
{"clients", drm_clients_info, 0},
{"queues", drm_queues_info, 0},
{"bufs", drm_bufs_info, 0},
{"vblank", drm_vblank_info, 0},
{"gem_names", drm_gem_name_info, DRIVER_GEM},
{"gem_objects", drm_gem_object_info, DRIVER_GEM},
#if DRM_DEBUG_CODE
......@@ -457,6 +460,66 @@ static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
return ret;
}
/**
* Called when "/proc/dri/.../vblank" is read.
*
* \param buf output buffer.
* \param start start of output data.
* \param offset requested start offset.
* \param request requested number of bytes.
* \param eof whether there is no more data to return.
* \param data private data.
* \return number of written bytes.
*/
static int drm__vblank_info(char *buf, char **start, off_t offset, int request,
int *eof, void *data)
{
struct drm_minor *minor = (struct drm_minor *) data;
struct drm_device *dev = minor->dev;
int len = 0;
int crtc;
if (offset > DRM_PROC_LIMIT) {
*eof = 1;
return 0;
}
*start = &buf[offset];
*eof = 0;
for (crtc = 0; crtc < dev->num_crtcs; crtc++) {
DRM_PROC_PRINT("CRTC %d enable: %d\n",
crtc, atomic_read(&dev->vblank_refcount[crtc]));
DRM_PROC_PRINT("CRTC %d counter: %d\n",
crtc, drm_vblank_count(dev, crtc));
DRM_PROC_PRINT("CRTC %d last wait: %d\n",
crtc, dev->last_vblank_wait[crtc]);
DRM_PROC_PRINT("CRTC %d in modeset: %d\n",
crtc, dev->vblank_inmodeset[crtc]);
}
if (len > request + offset)
return request;
*eof = 1;
return len - offset;
}
/**
* Simply calls _vblank_info() while holding the drm_device::struct_mutex lock.
*/
static int drm_vblank_info(char *buf, char **start, off_t offset, int request,
int *eof, void *data)
{
struct drm_minor *minor = (struct drm_minor *) data;
struct drm_device *dev = minor->dev;
int ret;
mutex_lock(&dev->struct_mutex);
ret = drm__vblank_info(buf, start, offset, request, eof, data);
mutex_unlock(&dev->struct_mutex);
return ret;
}
/**
* Called when "/proc/dri/.../clients" is read.
*
......
......@@ -911,6 +911,7 @@ struct drm_device {
int *vblank_enabled; /* so we don't call enable more than
once per disable */
int *vblank_inmodeset; /* Display driver is setting mode */
u32 *last_vblank_wait; /* Last vblank seqno waited per CRTC */
struct timer_list vblank_disable_timer;
u32 max_vblank_count; /**< size of vblank counter register */
......
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