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Date: Mon, 14 Dec 2015 16:35:20 +0800
From: Mark Yao <mark.yao@...k-chips.com>
To: David Airlie <airlied@...ux.ie>, Heiko Stuebner <heiko@...ech.de>,
dri-devel@...ts.freedesktop.org,
linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc: Mark Yao <mark.yao@...k-chips.com>
Subject: [PATCH v2 5/8] drm/rockchip: support atomic asynchronous commit
If drm core requests a async commit, rockchip_drm_atomic_commit
will schedule a work task to update later.
Signed-off-by: Mark Yao <mark.yao@...k-chips.com>
---
Changes in v2:
- serialize outstanding asynchronous commits
drivers/gpu/drm/rockchip/rockchip_drm_drv.c | 3 +
drivers/gpu/drm/rockchip/rockchip_drm_drv.h | 10 ++++
drivers/gpu/drm/rockchip/rockchip_drm_fb.c | 83 +++++++++++++++++++--------
3 files changed, 71 insertions(+), 25 deletions(-)
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
index ab3e0f6..5edd5ccb 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
@@ -140,6 +140,9 @@ static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
if (!private)
return -ENOMEM;
+ mutex_init(&private->commit.lock);
+ INIT_WORK(&private->commit.work, rockchip_drm_atomic_work);
+
drm_dev->dev_private = private;
drm_mode_config_init(drm_dev);
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
index 513ff98..a2f7aca 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.h
@@ -41,6 +41,13 @@ struct rockchip_crtc_funcs {
void (*disable_vblank)(struct drm_crtc *crtc);
};
+struct rockchip_atomic_commit {
+ struct work_struct work;
+ struct drm_atomic_state *state;
+ struct drm_device *dev;
+ struct mutex lock;
+};
+
/*
* Rockchip drm private structure.
*
@@ -51,8 +58,11 @@ struct rockchip_drm_private {
struct drm_fb_helper fbdev_helper;
struct drm_gem_object *fbdev_bo;
const struct rockchip_crtc_funcs *crtc_funcs[ROCKCHIP_MAX_CRTC];
+
+ struct rockchip_atomic_commit commit;
};
+void rockchip_drm_atomic_work(struct work_struct *work);
int rockchip_register_crtc_funcs(struct drm_crtc *crtc,
const struct rockchip_crtc_funcs *crtc_funcs);
void rockchip_unregister_crtc_funcs(struct drm_crtc *crtc);
diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
index 9aca778..1753bee 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_fb.c
@@ -167,48 +167,44 @@ static void rockchip_drm_output_poll_changed(struct drm_device *dev)
drm_fb_helper_hotplug_event(fb_helper);
}
-static void rockchip_atomic_wait_for_complete(struct drm_atomic_state *state)
+static void
+rockchip_atomic_wait_for_complete(struct drm_atomic_state *old_state)
{
- struct drm_crtc_state *crtc_state;
+ struct drm_crtc_state *old_crtc_state;
struct drm_crtc *crtc;
- int i;
+ int i, ret;
+
+ for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
+ /* No one cares about the old state, so abuse it for tracking
+ * and store whether we hold a vblank reference (and should do a
+ * vblank wait) in the ->enable boolean.
+ */
+ old_crtc_state->enable = false;
- for_each_crtc_in_state(state, crtc, crtc_state, i) {
if (!crtc->state->active)
continue;
- WARN_ON(drm_crtc_vblank_get(crtc));
- }
-
- for_each_crtc_in_state(state, crtc, crtc_state, i) {
- if (!crtc->state->active)
+ ret = drm_crtc_vblank_get(crtc);
+ if (ret != 0)
continue;
- rockchip_crtc_wait_for_update(crtc);
+ old_crtc_state->enable = true;
}
- for_each_crtc_in_state(state, crtc, crtc_state, i) {
- if (!crtc->state->active)
+ for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
+ if (!old_crtc_state->enable)
continue;
+ rockchip_crtc_wait_for_update(crtc);
drm_crtc_vblank_put(crtc);
}
}
-int rockchip_drm_atomic_commit(struct drm_device *dev,
- struct drm_atomic_state *state,
- bool async)
+static void
+rockchip_atomic_commit_complete(struct rockchip_atomic_commit *commit)
{
- int ret;
-
- if (async)
- return -EBUSY;
-
- ret = drm_atomic_helper_prepare_planes(dev, state);
- if (ret)
- return ret;
-
- drm_atomic_helper_swap_state(dev, state);
+ struct drm_atomic_state *state = commit->state;
+ struct drm_device *dev = commit->dev;
/*
* TODO: do fence wait here.
@@ -240,6 +236,43 @@ int rockchip_drm_atomic_commit(struct drm_device *dev,
drm_atomic_helper_cleanup_planes(dev, state);
drm_atomic_state_free(state);
+}
+
+void rockchip_drm_atomic_work(struct work_struct *work)
+{
+ struct rockchip_atomic_commit *commit = container_of(work,
+ struct rockchip_atomic_commit, work);
+
+ rockchip_atomic_commit_complete(commit);
+}
+
+int rockchip_drm_atomic_commit(struct drm_device *dev,
+ struct drm_atomic_state *state,
+ bool async)
+{
+ struct rockchip_drm_private *private = dev->dev_private;
+ struct rockchip_atomic_commit *commit = &private->commit;
+ int ret;
+
+ ret = drm_atomic_helper_prepare_planes(dev, state);
+ if (ret)
+ return ret;
+
+ /* serialize outstanding asynchronous commits */
+ mutex_lock(&commit->lock);
+ flush_work(&commit->work);
+
+ drm_atomic_helper_swap_state(dev, state);
+
+ commit->dev = dev;
+ commit->state = state;
+
+ if (async)
+ schedule_work(&commit->work);
+ else
+ rockchip_atomic_commit_complete(commit);
+
+ mutex_unlock(&commit->lock);
return 0;
}
--
1.7.9.5
--
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