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authorDave Airlie <airlied@redhat.com>2016-07-27 03:33:08 +0300
committerDave Airlie <airlied@redhat.com>2016-07-27 03:33:08 +0300
commit9af07af948ff3a8e20920b9279821db244d1ca69 (patch)
treeb208a39aa6b33a24f46cf2bd5cbbd623f2f68bfb /include/drm/drm_irq.h
parent5e580523d9128a4d8364fe89d36c38fc7819c8dd (diff)
parente8d3ef02787fc72996cfb423180dc79764c239fa (diff)
downloadlinux-9af07af948ff3a8e20920b9279821db244d1ca69.tar.xz
Merge tag 'topic/drm-misc-2016-07-22' of git://anongit.freedesktop.org/drm-intel into drm-next
Suddenly everyone shows up with their trivial patch series! - piles of if (!ptr) check removals from Markus Elfring - more of_node_put fixes from Peter Chen - make fbdev support really optional in all drivers (except vmwgfx), somehow this fell through the cracks when we did all the hard prep work a while ago. Patches from Tobias Jakobi. - leftover patches for the connector reg/unreg cleanup (required that I backmerged drm-next) from Chris - last vgem fence patch from Chris - fix up warnings in the new sphinx gpu docs build - misc other small bits * tag 'topic/drm-misc-2016-07-22' of git://anongit.freedesktop.org/drm-intel: (57 commits) GPU-DRM-Exynos: Delete an unnecessary check before the function call "vunmap" GPU-DRM-sun4i: Delete an unnecessary check before drm_fbdev_cma_hotplug_event() drm/atomic: Delete an unnecessary check before drm_property_unreference_blob() drm/rockchip: analogix_dp: add missing clk_disable_unprepare() on error drm: drm_connector->s/connector_id/index/ for consistency drm/virtio: Fix non static symbol warning drm/arc: Remove redundant dev_err call in arcpgu_load() drm/arc: Fix some sparse warnings drm/vgem: Fix non static symbol warning drm/doc: Spinx leftovers drm/dp-mst: Missing kernel doc drm/dp-mst: Remove tx_down_in_progress drm/doc: Fix missing kerneldoc for drm_dp_helper.c drm: Extract&Document drm_irq.h drm/doc: document all the properties in drm_mode_config drm/drm-kms.rst: Remove unused drm_fourcc.h include directive drm/doc: Add kerneldoc for @index drm: Unexport drm_connector_unregister_all() drm/sun4i: Remove redundant call to drm_connector_unregister_all() drm/ttm: Delete an unnecessary check before the function call "ttm_tt_destroy" ...
Diffstat (limited to 'include/drm/drm_irq.h')
-rw-r--r--include/drm/drm_irq.h183
1 files changed, 183 insertions, 0 deletions
diff --git a/include/drm/drm_irq.h b/include/drm/drm_irq.h
new file mode 100644
index 000000000000..2401b14d301f
--- /dev/null
+++ b/include/drm/drm_irq.h
@@ -0,0 +1,183 @@
+/*
+ * 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_IRQ_H_
+#define _DRM_IRQ_H_
+
+#include <linux/seqlock.h>
+
+/**
+ * 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
+ * max_vblank_count value in the &drm_device structure.
+ */
+ 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 dev->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;
+ /**
+ * @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;
+};
+
+extern int drm_irq_install(struct drm_device *dev, int irq);
+extern int drm_irq_uninstall(struct drm_device *dev);
+
+extern int drm_vblank_init(struct drm_device *dev, unsigned int num_crtcs);
+extern int drm_wait_vblank(struct drm_device *dev, void *data,
+ struct drm_file *filp);
+extern u32 drm_vblank_count(struct drm_device *dev, unsigned int pipe);
+extern u32 drm_crtc_vblank_count(struct drm_crtc *crtc);
+extern u32 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc,
+ struct timeval *vblanktime);
+extern void drm_crtc_send_vblank_event(struct drm_crtc *crtc,
+ struct drm_pending_vblank_event *e);
+extern void drm_crtc_arm_vblank_event(struct drm_crtc *crtc,
+ struct drm_pending_vblank_event *e);
+extern bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe);
+extern bool drm_crtc_handle_vblank(struct drm_crtc *crtc);
+extern int drm_crtc_vblank_get(struct drm_crtc *crtc);
+extern void drm_crtc_vblank_put(struct drm_crtc *crtc);
+extern void drm_wait_one_vblank(struct drm_device *dev, unsigned int pipe);
+extern void drm_crtc_wait_one_vblank(struct drm_crtc *crtc);
+extern void drm_vblank_off(struct drm_device *dev, unsigned int pipe);
+extern void drm_vblank_on(struct drm_device *dev, unsigned int pipe);
+extern void drm_crtc_vblank_off(struct drm_crtc *crtc);
+extern void drm_crtc_vblank_reset(struct drm_crtc *crtc);
+extern void drm_crtc_vblank_on(struct drm_crtc *crtc);
+extern void drm_vblank_cleanup(struct drm_device *dev);
+extern u32 drm_accurate_vblank_count(struct drm_crtc *crtc);
+extern u32 drm_vblank_no_hw_counter(struct drm_device *dev, unsigned int pipe);
+
+extern int drm_calc_vbltimestamp_from_scanoutpos(struct drm_device *dev,
+ unsigned int pipe, int *max_error,
+ struct timeval *vblank_time,
+ unsigned flags,
+ const struct drm_display_mode *mode);
+extern void drm_calc_timestamping_constants(struct drm_crtc *crtc,
+ const struct drm_display_mode *mode);
+
+/**
+ * drm_crtc_vblank_waitqueue - get vblank waitqueue for the CRTC
+ * @crtc: which CRTC's vblank waitqueue to retrieve
+ *
+ * This function returns a pointer to the vblank waitqueue for the CRTC.
+ * Drivers can use this to implement vblank waits using wait_event() and related
+ * functions.
+ */
+static inline wait_queue_head_t *drm_crtc_vblank_waitqueue(struct drm_crtc *crtc)
+{
+ return &crtc->dev->vblank[drm_crtc_index(crtc)].queue;
+}
+
+#endif