Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/drm/drm_vblank.h b/include/drm/drm_vblank.h
index d25a960..9fe4ba8 100644
--- a/include/drm/drm_vblank.h
+++ b/include/drm/drm_vblank.h
@@ -30,7 +30,6 @@
#include <drm/drm_file.h>
#include <drm/drm_modes.h>
-#include <uapi/drm/drm.h>
struct drm_device;
struct drm_crtc;
@@ -95,7 +94,7 @@
/**
* @queue: Wait queue for vblank waiters.
*/
- wait_queue_head_t queue; /**< VBLANK wait queue */
+ wait_queue_head_t queue;
/**
* @disable_timer: Disable timer for the delayed vblank disabling
* hysteresis logic. Vblank disabling is controlled through the
@@ -107,7 +106,7 @@
/**
* @seqlock: Protect vblank count and time.
*/
- seqlock_t seqlock; /* protects vblank count and time */
+ seqlock_t seqlock;
/**
* @count: Current software vblank counter.
@@ -123,12 +122,32 @@
* this refcount reaches 0 can the hardware interrupt be disabled using
* @disable_timer.
*/
- atomic_t refcount; /* number of users of vblank interruptsper crtc */
+ atomic_t refcount;
/**
* @last: Protected by &drm_device.vbl_lock, used for wraparound handling.
*/
u32 last;
/**
+ * @max_vblank_count:
+ *
+ * Maximum value of the vblank registers for this crtc. This value +1
+ * will result in a wrap-around of the vblank register. It is used
+ * by the vblank core to handle wrap-arounds.
+ *
+ * If set to zero the vblank core will try to guess the elapsed vblanks
+ * between times when the vblank interrupt is disabled through
+ * high-precision timestamps. That approach is suffering from small
+ * races and imprecision over longer time periods, hence exposing a
+ * hardware vblank counter is always recommended.
+ *
+ * This is the runtime configurable per-crtc maximum set through
+ * drm_crtc_set_max_vblank_count(). If this is used the driver
+ * must leave the device wide &drm_device.max_vblank_count at zero.
+ *
+ * If non-zero, &drm_crtc_funcs.get_vblank_counter must be set.
+ */
+ u32 max_vblank_count;
+ /**
* @inmodeset: Tracks whether the vblank is disabled due to a modeset.
* For legacy driver bit 2 additionally tracks whether an additional
* temporary vblank reference has been acquired to paper over the
@@ -136,7 +155,7 @@
* call drm_crtc_vblank_off() and drm_crtc_vblank_on(), which explicitly
* save and restore the vblank count.
*/
- unsigned int inmodeset; /* Display driver is setting mode */
+ unsigned int inmodeset;
/**
* @pipe: drm_crtc_index() of the &drm_crtc corresponding to this
* structure.
@@ -206,4 +225,6 @@
void drm_calc_timestamping_constants(struct drm_crtc *crtc,
const struct drm_display_mode *mode);
wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc);
+void drm_crtc_set_max_vblank_count(struct drm_crtc *crtc,
+ u32 max_vblank_count);
#endif