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183 lines
6.6 KiB
183 lines
6.6 KiB
/* |
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* Copyright 2016 Intel Corp. |
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* |
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* Permission is hereby granted, free of charge, to any person obtaining a |
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* copy of this software and associated documentation files (the "Software"), |
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* to deal in the Software without restriction, including without limitation |
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* the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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* and/or sell copies of the Software, and to permit persons to whom the |
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* Software is furnished to do so, subject to the following conditions: |
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* |
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* The above copyright notice and this permission notice (including the next |
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* paragraph) shall be included in all copies or substantial portions of the |
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* Software. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
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* OTHER DEALINGS IN THE SOFTWARE. |
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*/ |
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#ifndef _DRM_IRQ_H_ |
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#define _DRM_IRQ_H_ |
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#include <linux/seqlock.h> |
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/** |
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* struct drm_pending_vblank_event - pending vblank event tracking |
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*/ |
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struct drm_pending_vblank_event { |
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/** |
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* @base: Base structure for tracking pending DRM events. |
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*/ |
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struct drm_pending_event base; |
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/** |
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* @pipe: drm_crtc_index() of the &drm_crtc this event is for. |
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*/ |
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unsigned int pipe; |
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/** |
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* @event: Actual event which will be sent to userspace. |
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*/ |
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struct drm_event_vblank event; |
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}; |
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/** |
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* struct drm_vblank_crtc - vblank tracking for a CRTC |
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* |
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* This structure tracks the vblank state for one CRTC. |
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* |
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* Note that for historical reasons - the vblank handling code is still shared |
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* with legacy/non-kms drivers - this is a free-standing structure not directly |
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* connected to struct &drm_crtc. But all public interface functions are taking |
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* a struct &drm_crtc to hide this implementation detail. |
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*/ |
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struct drm_vblank_crtc { |
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/** |
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* @dev: Pointer to the &drm_device. |
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*/ |
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struct drm_device *dev; |
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/** |
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* @queue: Wait queue for vblank waiters. |
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*/ |
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wait_queue_head_t queue; /**< VBLANK wait queue */ |
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/** |
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* @disable_timer: Disable timer for the delayed vblank disabling |
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* hysteresis logic. Vblank disabling is controlled through the |
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* drm_vblank_offdelay module option and the setting of the |
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* max_vblank_count value in the &drm_device structure. |
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*/ |
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struct timer_list disable_timer; |
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/** |
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* @seqlock: Protect vblank count and time. |
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*/ |
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seqlock_t seqlock; /* protects vblank count and time */ |
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/** |
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* @count: Current software vblank counter. |
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*/ |
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u32 count; |
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/** |
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* @time: Vblank timestamp corresponding to @count. |
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*/ |
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struct timeval time; |
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/** |
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* @refcount: Number of users/waiters of the vblank interrupt. Only when |
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* this refcount reaches 0 can the hardware interrupt be disabled using |
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* @disable_timer. |
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*/ |
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atomic_t refcount; /* number of users of vblank interruptsper crtc */ |
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/** |
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* @last: Protected by dev->vbl_lock, used for wraparound handling. |
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*/ |
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u32 last; |
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/** |
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* @inmodeset: Tracks whether the vblank is disabled due to a modeset. |
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* For legacy driver bit 2 additionally tracks whether an additional |
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* temporary vblank reference has been acquired to paper over the |
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* hardware counter resetting/jumping. KMS drivers should instead just |
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* call drm_crtc_vblank_off() and drm_crtc_vblank_on(), which explicitly |
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* save and restore the vblank count. |
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*/ |
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unsigned int inmodeset; /* Display driver is setting mode */ |
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/** |
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* @pipe: drm_crtc_index() of the &drm_crtc corresponding to this |
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* structure. |
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*/ |
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unsigned int pipe; |
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/** |
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* @framedur_ns: Frame/Field duration in ns, used by |
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* drm_calc_vbltimestamp_from_scanoutpos() and computed by |
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* drm_calc_timestamping_constants(). |
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*/ |
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int framedur_ns; |
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/** |
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* @linedur_ns: Line duration in ns, used by |
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* drm_calc_vbltimestamp_from_scanoutpos() and computed by |
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* drm_calc_timestamping_constants(). |
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*/ |
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int linedur_ns; |
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/** |
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* @enabled: Tracks the enabling state of the corresponding &drm_crtc to |
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* avoid double-disabling and hence corrupting saved state. Needed by |
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* drivers not using atomic KMS, since those might go through their CRTC |
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* disabling functions multiple times. |
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*/ |
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bool enabled; |
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}; |
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extern int drm_irq_install(struct drm_device *dev, int irq); |
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extern int drm_irq_uninstall(struct drm_device *dev); |
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extern int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs); |
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extern int drm_wait_vblank(struct drm_device *dev, void *data, |
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struct drm_file *filp); |
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extern u32 drm_vblank_count(struct drm_device *dev, unsigned int pipe); |
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extern u32 drm_crtc_vblank_count(struct drm_crtc *crtc); |
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extern u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc, |
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struct timeval *vblanktime); |
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extern void drm_crtc_send_vblank_event(struct drm_crtc *crtc, |
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struct drm_pending_vblank_event *e); |
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extern void drm_crtc_arm_vblank_event(struct drm_crtc *crtc, |
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struct drm_pending_vblank_event *e); |
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extern bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe); |
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extern bool drm_crtc_handle_vblank(struct drm_crtc *crtc); |
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extern int drm_crtc_vblank_get(struct drm_crtc *crtc); |
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extern void drm_crtc_vblank_put(struct drm_crtc *crtc); |
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extern void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe); |
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extern void drm_crtc_wait_one_vblank(struct drm_crtc *crtc); |
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extern void drm_vblank_off(struct drm_device *dev, unsigned int pipe); |
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extern void drm_vblank_on(struct drm_device *dev, unsigned int pipe); |
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extern void drm_crtc_vblank_off(struct drm_crtc *crtc); |
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extern void drm_crtc_vblank_reset(struct drm_crtc *crtc); |
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extern void drm_crtc_vblank_on(struct drm_crtc *crtc); |
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extern void drm_vblank_cleanup(struct drm_device *dev); |
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extern u32 drm_accurate_vblank_count(struct drm_crtc *crtc); |
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extern u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe); |
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extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev, |
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unsigned int pipe, int *max_error, |
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struct timeval *vblank_time, |
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unsigned flags, |
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const struct drm_display_mode *mode); |
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extern void drm_calc_timestamping_constants(struct drm_crtc *crtc, |
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const struct drm_display_mode *mode); |
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/** |
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* drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC |
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* @crtc: which CRTC's vblank waitqueue to retrieve |
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* |
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* This function returns a pointer to the vblank waitqueue for the CRTC. |
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* Drivers can use this to implement vblank waits using wait_event() and related |
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* functions. |
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*/ |
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static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc) |
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{ |
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return &crtc->dev->vblank[drm_crtc_index(crtc)].queue; |
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} |
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#endif
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