181 lines
6.1 KiB
C
181 lines
6.1 KiB
C
/*
|
|
* Copyright 2016 Intel Corp.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef _DRM_VBLANK_H_
|
|
#define _DRM_VBLANK_H_
|
|
|
|
#include <linux/seqlock.h>
|
|
#include <linux/idr.h>
|
|
#include <linux/poll.h>
|
|
|
|
#include <drm/drm_file.h>
|
|
#include <drm/drm_modes.h>
|
|
#include <uapi/drm/drm.h>
|
|
|
|
struct drm_device;
|
|
struct drm_crtc;
|
|
|
|
/**
|
|
* struct drm_pending_vblank_event - pending vblank event tracking
|
|
*/
|
|
struct drm_pending_vblank_event {
|
|
/**
|
|
* @base: Base structure for tracking pending DRM events.
|
|
*/
|
|
struct drm_pending_event base;
|
|
/**
|
|
* @pipe: drm_crtc_index() of the &drm_crtc this event is for.
|
|
*/
|
|
unsigned int pipe;
|
|
/**
|
|
* @event: Actual event which will be sent to userspace.
|
|
*/
|
|
struct drm_event_vblank event;
|
|
};
|
|
|
|
/**
|
|
* struct drm_vblank_crtc - vblank tracking for a CRTC
|
|
*
|
|
* This structure tracks the vblank state for one CRTC.
|
|
*
|
|
* Note that for historical reasons - the vblank handling code is still shared
|
|
* with legacy/non-kms drivers - this is a free-standing structure not directly
|
|
* connected to &struct drm_crtc. But all public interface functions are taking
|
|
* a &struct drm_crtc to hide this implementation detail.
|
|
*/
|
|
struct drm_vblank_crtc {
|
|
/**
|
|
* @dev: Pointer to the &drm_device.
|
|
*/
|
|
struct drm_device *dev;
|
|
/**
|
|
* @queue: Wait queue for vblank waiters.
|
|
*/
|
|
wait_queue_head_t queue; /**< VBLANK wait queue */
|
|
/**
|
|
* @disable_timer: Disable timer for the delayed vblank disabling
|
|
* hysteresis logic. Vblank disabling is controlled through the
|
|
* drm_vblank_offdelay module option and the setting of the
|
|
* &drm_device.max_vblank_count value.
|
|
*/
|
|
struct timer_list disable_timer;
|
|
|
|
/**
|
|
* @seqlock: Protect vblank count and time.
|
|
*/
|
|
seqlock_t seqlock; /* protects vblank count and time */
|
|
|
|
/**
|
|
* @count: Current software vblank counter.
|
|
*/
|
|
u32 count;
|
|
/**
|
|
* @time: Vblank timestamp corresponding to @count.
|
|
*/
|
|
struct timeval time;
|
|
|
|
/**
|
|
* @refcount: Number of users/waiters of the vblank interrupt. Only when
|
|
* this refcount reaches 0 can the hardware interrupt be disabled using
|
|
* @disable_timer.
|
|
*/
|
|
atomic_t refcount; /* number of users of vblank interruptsper crtc */
|
|
/**
|
|
* @last: Protected by &drm_device.vbl_lock, used for wraparound handling.
|
|
*/
|
|
u32 last;
|
|
/**
|
|
* @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
|
|
* hardware counter resetting/jumping. KMS drivers should instead just
|
|
* 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 */
|
|
/**
|
|
* @pipe: drm_crtc_index() of the &drm_crtc corresponding to this
|
|
* structure.
|
|
*/
|
|
unsigned int pipe;
|
|
/**
|
|
* @framedur_ns: Frame/Field duration in ns, used by
|
|
* drm_calc_vbltimestamp_from_scanoutpos() and computed by
|
|
* drm_calc_timestamping_constants().
|
|
*/
|
|
int framedur_ns;
|
|
/**
|
|
* @linedur_ns: Line duration in ns, used by
|
|
* drm_calc_vbltimestamp_from_scanoutpos() and computed by
|
|
* drm_calc_timestamping_constants().
|
|
*/
|
|
int linedur_ns;
|
|
|
|
/**
|
|
* @hwmode:
|
|
*
|
|
* Cache of the current hardware display mode. Only valid when @enabled
|
|
* is set. This is used by helpers like
|
|
* drm_calc_vbltimestamp_from_scanoutpos(). We can't just access the
|
|
* hardware mode by e.g. looking at &drm_crtc_state.adjusted_mode,
|
|
* because that one is really hard to get from interrupt context.
|
|
*/
|
|
struct drm_display_mode hwmode;
|
|
|
|
/**
|
|
* @enabled: Tracks the enabling state of the corresponding &drm_crtc to
|
|
* avoid double-disabling and hence corrupting saved state. Needed by
|
|
* drivers not using atomic KMS, since those might go through their CRTC
|
|
* disabling functions multiple times.
|
|
*/
|
|
bool enabled;
|
|
};
|
|
|
|
int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs);
|
|
u32 drm_crtc_vblank_count(struct drm_crtc *crtc);
|
|
u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc,
|
|
struct timeval *vblanktime);
|
|
void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
|
|
struct drm_pending_vblank_event *e);
|
|
void drm_crtc_arm_vblank_event(struct drm_crtc *crtc,
|
|
struct drm_pending_vblank_event *e);
|
|
bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe);
|
|
bool drm_crtc_handle_vblank(struct drm_crtc *crtc);
|
|
int drm_crtc_vblank_get(struct drm_crtc *crtc);
|
|
void drm_crtc_vblank_put(struct drm_crtc *crtc);
|
|
void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe);
|
|
void drm_crtc_wait_one_vblank(struct drm_crtc *crtc);
|
|
void drm_crtc_vblank_off(struct drm_crtc *crtc);
|
|
void drm_crtc_vblank_reset(struct drm_crtc *crtc);
|
|
void drm_crtc_vblank_on(struct drm_crtc *crtc);
|
|
u32 drm_crtc_accurate_vblank_count(struct drm_crtc *crtc);
|
|
|
|
bool drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
|
|
unsigned int pipe, int *max_error,
|
|
struct timeval *vblank_time,
|
|
bool in_vblank_irq);
|
|
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);
|
|
#endif
|