From: Rob Clark <robdclark@gmail.com> To: dri-devel@lists.freedesktop.org Cc: "Daniel Vetter" <daniel@ffwll.ch>, "Matthew Brost" <matthew.brost@intel.com>, "Christian König" <ckoenig.leichtzumerken@gmail.com>, "Rob Clark" <robdclark@chromium.org>, "Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>, "Maxime Ripard" <mripard@kernel.org>, "Thomas Zimmermann" <tzimmermann@suse.de>, "David Airlie" <airlied@linux.ie>, linux-kernel@vger.kernel.org (open list) Subject: [RFC 2/4] drm/vblank: Add helper to get next vblank time Date: Mon, 26 Jul 2021 16:38:49 -0700 [thread overview] Message-ID: <20210726233854.2453899-3-robdclark@gmail.com> (raw) In-Reply-To: <20210726233854.2453899-1-robdclark@gmail.com> From: Rob Clark <robdclark@chromium.org> Signed-off-by: Rob Clark <robdclark@chromium.org> --- drivers/gpu/drm/drm_vblank.c | 31 +++++++++++++++++++++++++++++++ include/drm/drm_vblank.h | 1 + 2 files changed, 32 insertions(+) diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c index 3417e1ac7918..88c824c294dc 100644 --- a/drivers/gpu/drm/drm_vblank.c +++ b/drivers/gpu/drm/drm_vblank.c @@ -980,6 +980,37 @@ u64 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc, } EXPORT_SYMBOL(drm_crtc_vblank_count_and_time); +/** + * drm_crtc_next_vblank_time - calculate the time of the next vblank + * @crtc: the crtc for which to calculate next vblank time + * @vblanktime: pointer to time to receive the next vblank timestamp. + * + * Calculate the expected time of the next vblank based on time of previous + * vblank and frame duration + */ +int drm_crtc_next_vblank_time(struct drm_crtc *crtc, ktime_t *vblanktime) +{ + unsigned int pipe = drm_crtc_index(crtc); + struct drm_vblank_crtc *vblank = &crtc->dev->vblank[pipe]; + u64 count; + + if (!vblank->framedur_ns) + return -EINVAL; + + count = drm_vblank_count_and_time(crtc->dev, pipe, vblanktime); + + /* + * If we don't get a valid count, then we probably also don't + * have a valid time: + */ + if (!count) + return -EINVAL; + + *vblanktime = ktime_add(*vblanktime, ns_to_ktime(vblank->framedur_ns)); + + return 0; +} + static void send_vblank_event(struct drm_device *dev, struct drm_pending_vblank_event *e, u64 seq, ktime_t now) diff --git a/include/drm/drm_vblank.h b/include/drm/drm_vblank.h index 733a3e2d1d10..a63bc2c92f3c 100644 --- a/include/drm/drm_vblank.h +++ b/include/drm/drm_vblank.h @@ -230,6 +230,7 @@ bool drm_dev_has_vblank(const struct drm_device *dev); u64 drm_crtc_vblank_count(struct drm_crtc *crtc); u64 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc, ktime_t *vblanktime); +int drm_crtc_next_vblank_time(struct drm_crtc *crtc, ktime_t *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, -- 2.31.1
WARNING: multiple messages have this Message-ID (diff)
From: Rob Clark <robdclark@gmail.com> To: dri-devel@lists.freedesktop.org Cc: "Matthew Brost" <matthew.brost@intel.com>, "Rob Clark" <robdclark@chromium.org>, "Thomas Zimmermann" <tzimmermann@suse.de>, "David Airlie" <airlied@linux.ie>, "Christian König" <ckoenig.leichtzumerken@gmail.com>, "open list" <linux-kernel@vger.kernel.org> Subject: [RFC 2/4] drm/vblank: Add helper to get next vblank time Date: Mon, 26 Jul 2021 16:38:49 -0700 [thread overview] Message-ID: <20210726233854.2453899-3-robdclark@gmail.com> (raw) In-Reply-To: <20210726233854.2453899-1-robdclark@gmail.com> From: Rob Clark <robdclark@chromium.org> Signed-off-by: Rob Clark <robdclark@chromium.org> --- drivers/gpu/drm/drm_vblank.c | 31 +++++++++++++++++++++++++++++++ include/drm/drm_vblank.h | 1 + 2 files changed, 32 insertions(+) diff --git a/drivers/gpu/drm/drm_vblank.c b/drivers/gpu/drm/drm_vblank.c index 3417e1ac7918..88c824c294dc 100644 --- a/drivers/gpu/drm/drm_vblank.c +++ b/drivers/gpu/drm/drm_vblank.c @@ -980,6 +980,37 @@ u64 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc, } EXPORT_SYMBOL(drm_crtc_vblank_count_and_time); +/** + * drm_crtc_next_vblank_time - calculate the time of the next vblank + * @crtc: the crtc for which to calculate next vblank time + * @vblanktime: pointer to time to receive the next vblank timestamp. + * + * Calculate the expected time of the next vblank based on time of previous + * vblank and frame duration + */ +int drm_crtc_next_vblank_time(struct drm_crtc *crtc, ktime_t *vblanktime) +{ + unsigned int pipe = drm_crtc_index(crtc); + struct drm_vblank_crtc *vblank = &crtc->dev->vblank[pipe]; + u64 count; + + if (!vblank->framedur_ns) + return -EINVAL; + + count = drm_vblank_count_and_time(crtc->dev, pipe, vblanktime); + + /* + * If we don't get a valid count, then we probably also don't + * have a valid time: + */ + if (!count) + return -EINVAL; + + *vblanktime = ktime_add(*vblanktime, ns_to_ktime(vblank->framedur_ns)); + + return 0; +} + static void send_vblank_event(struct drm_device *dev, struct drm_pending_vblank_event *e, u64 seq, ktime_t now) diff --git a/include/drm/drm_vblank.h b/include/drm/drm_vblank.h index 733a3e2d1d10..a63bc2c92f3c 100644 --- a/include/drm/drm_vblank.h +++ b/include/drm/drm_vblank.h @@ -230,6 +230,7 @@ bool drm_dev_has_vblank(const struct drm_device *dev); u64 drm_crtc_vblank_count(struct drm_crtc *crtc); u64 drm_crtc_vblank_count_and_time(struct drm_crtc *crtc, ktime_t *vblanktime); +int drm_crtc_next_vblank_time(struct drm_crtc *crtc, ktime_t *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, -- 2.31.1
next prev parent reply other threads:[~2021-07-26 23:34 UTC|newest] Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-07-26 23:38 [RFC 0/4] dma-fence: Deadline awareness Rob Clark 2021-07-26 23:38 ` Rob Clark 2021-07-26 23:38 ` [RFC 1/4] dma-fence: Add deadline awareness Rob Clark 2021-07-26 23:38 ` Rob Clark 2021-07-27 7:11 ` Christian König 2021-07-27 7:11 ` Christian König 2021-07-27 14:25 ` Rob Clark 2021-07-27 14:25 ` Rob Clark 2021-07-28 7:03 ` Christian König 2021-07-28 7:03 ` Christian König 2021-07-28 11:37 ` Christian König 2021-07-28 11:37 ` Christian König 2021-07-28 15:15 ` Rob Clark 2021-07-28 15:15 ` Rob Clark 2021-07-28 17:23 ` Christian König 2021-07-28 17:23 ` Christian König 2021-07-28 17:58 ` Rob Clark 2021-07-28 17:58 ` Rob Clark 2021-07-29 7:03 ` Daniel Vetter 2021-07-29 7:03 ` Daniel Vetter 2021-07-29 15:23 ` Rob Clark 2021-07-29 15:23 ` Rob Clark 2021-07-29 16:18 ` Daniel Vetter 2021-07-29 16:18 ` Daniel Vetter 2021-07-29 17:32 ` Rob Clark 2021-07-29 17:32 ` Rob Clark 2021-07-26 23:38 ` Rob Clark [this message] 2021-07-26 23:38 ` [RFC 2/4] drm/vblank: Add helper to get next vblank time Rob Clark 2021-07-26 23:38 ` [RFC 3/4] drm/atomic-helper: Set fence deadline for vblank Rob Clark 2021-07-26 23:38 ` Rob Clark 2021-07-27 10:44 ` Michel Dänzer 2021-07-27 10:44 ` Michel Dänzer 2021-07-27 14:33 ` Rob Clark 2021-07-27 14:33 ` Rob Clark 2021-07-26 23:38 ` [RFC 4/4] drm/scheduler: Add fence deadline support Rob Clark 2021-07-26 23:38 ` Rob Clark 2021-07-26 23:51 ` [RFC 0/4] dma-fence: Deadline awareness Rob Clark 2021-07-26 23:51 ` Rob Clark 2021-07-27 14:41 ` Michel Dänzer 2021-07-27 14:41 ` Michel Dänzer 2021-07-27 15:12 ` Rob Clark 2021-07-27 15:12 ` Rob Clark 2021-07-27 15:19 ` Michel Dänzer 2021-07-27 15:37 ` Rob Clark 2021-07-27 15:37 ` Rob Clark 2021-07-28 11:36 ` Christian König 2021-07-28 11:36 ` Christian König 2021-07-28 13:08 ` Michel Dänzer 2021-07-28 13:13 ` Christian König 2021-07-28 13:13 ` Christian König 2021-07-28 13:24 ` Michel Dänzer 2021-07-28 13:24 ` Michel Dänzer 2021-07-28 13:31 ` Christian König 2021-07-28 13:31 ` Christian König 2021-07-28 13:57 ` Pekka Paalanen 2021-07-28 13:57 ` Pekka Paalanen 2021-07-28 14:30 ` Christian König 2021-07-28 14:30 ` Christian König 2021-07-29 8:08 ` Michel Dänzer 2021-07-29 8:23 ` Pekka Paalanen 2021-07-29 8:23 ` Pekka Paalanen 2021-07-29 8:43 ` Christian König 2021-07-29 8:43 ` Christian König 2021-07-29 9:15 ` Pekka Paalanen 2021-07-29 9:15 ` Pekka Paalanen 2021-07-29 10:14 ` Christian König 2021-07-29 10:14 ` Christian König 2021-07-29 10:28 ` Michel Dänzer 2021-07-29 10:28 ` Michel Dänzer 2021-07-29 11:00 ` Pekka Paalanen 2021-07-29 11:00 ` Pekka Paalanen 2021-07-29 11:43 ` Christian König 2021-07-29 11:43 ` Christian König 2021-07-29 12:49 ` Pekka Paalanen 2021-07-29 12:49 ` Pekka Paalanen 2021-07-29 13:41 ` Christian König 2021-07-29 13:41 ` Christian König 2021-07-29 14:10 ` Pekka Paalanen 2021-07-29 14:10 ` Pekka Paalanen 2021-07-28 15:27 ` Rob Clark 2021-07-28 15:27 ` Rob Clark 2021-07-28 17:20 ` Christian König 2021-07-28 15:34 ` Rob Clark 2021-07-28 15:34 ` Rob Clark 2021-07-29 7:09 ` Daniel Vetter 2021-07-29 7:09 ` Daniel Vetter 2021-07-29 8:17 ` Michel Dänzer 2021-07-29 8:17 ` Michel Dänzer 2021-07-29 9:03 ` Daniel Vetter 2021-07-29 9:03 ` Daniel Vetter 2021-07-29 9:37 ` Pekka Paalanen 2021-07-29 9:37 ` Pekka Paalanen 2021-07-29 12:18 ` Daniel Vetter 2021-07-29 12:18 ` Daniel Vetter 2021-07-29 12:59 ` Pekka Paalanen 2021-07-29 12:59 ` Pekka Paalanen 2021-07-29 14:05 ` Daniel Vetter 2021-07-29 14:05 ` Daniel Vetter 2021-07-27 21:17 ` [RFC 5/4] drm/msm: Add deadline based boost support Rob Clark 2021-07-27 21:17 ` Rob Clark
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