From: Thierry Reding <treding@xxxxxxxxxx>
This function is the KMS native variant of drm_vblank_count_and_time().
It takes a struct drm_crtc * instead of a struct drm_device * and an
index of the CRTC.
Eventually the goal is to access vblank data through the CRTC only so
that the per-CRTC data can be moved to struct drm_crtc.
Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
---
drivers/gpu/drm/drm_irq.c | 23 +++++++++++++++++++++++
include/drm/drmP.h | 2 ++
2 files changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c
index 9c32a1d7aec2..b34900a8e172 100644
--- a/drivers/gpu/drm/drm_irq.c
+++ b/drivers/gpu/drm/drm_irq.c
@@ -877,6 +877,8 @@ EXPORT_SYMBOL(drm_crtc_vblank_count);
* vblank events since the system was booted, including lost events due to
* modesetting activity. Returns corresponding system timestamp of the time
* of the vblank interval that corresponds to the current vblank counter value.
+ *
+ * This is the legacy version of drm_crtc_vblank_count_and_time().
*/
u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
struct timeval *vblanktime)
@@ -902,6 +904,27 @@ u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
}
EXPORT_SYMBOL(drm_vblank_count_and_time);
+/**
+ * drm_crtc_vblank_count_and_time - retrieve "cooked" vblank counter value
+ * and the system timestamp corresponding to that vblank counter value
+ * @crtc: which counter to retrieve
+ * @vblanktime: Pointer to struct timeval to receive the vblank timestamp.
+ *
+ * Fetches the "cooked" vblank count value that represents the number of
+ * vblank events since the system was booted, including lost events due to
+ * modesetting activity. Returns corresponding system timestamp of the time
+ * of the vblank interval that corresponds to the current vblank counter value.
+ *
+ * This is the native KMS version of drm_vblank_count_and_time().
+ */
+u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc,
+ struct timeval *vblanktime)
+{
+ return drm_vblank_count_and_time(crtc->dev, drm_crtc_index(crtc),
+ vblanktime);
+}
+EXPORT_SYMBOL(drm_crtc_vblank_count_and_time);
+
static void send_vblank_event(struct drm_device *dev,
struct drm_pending_vblank_event *e,
unsigned long seq, struct timeval *now)
diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index de3d3f7091fb..7baef1dff5f3 100644
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1072,6 +1072,8 @@ extern u32 drm_vblank_count(struct drm_device *dev, int pipe);
extern u32 drm_crtc_vblank_count(struct drm_crtc *crtc);
extern u32 drm_vblank_count_and_time(struct drm_device *dev, unsigned int pipe,
struct timeval *vblanktime);
+extern u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc,
+ struct timeval *vblanktime);
extern void drm_send_vblank_event(struct drm_device *dev, unsigned int pipe,
struct drm_pending_vblank_event *e);
extern void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
--
2.1.3
--
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