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Subject[PATCH v2 1/2] drm/fence: enable drm_atomic_helper_wait_for_fences() to interrupt
Date
From: Gustavo Padovan <gustavo.padovan@collabora.co.uk>

Add an extra arg to drm_atomic_helper_wait_for_fences() to inform
if fence_wait() should be called interruptible or uninterruptible.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
---
drivers/gpu/drm/drm_atomic_helper.c | 19 ++++++++++++++-----
drivers/gpu/drm/msm/msm_atomic.c | 2 +-
include/drm/drm_atomic_helper.h | 5 +++--
3 files changed, 18 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index e1f5de2..bf1bc43 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -1007,18 +1007,22 @@ EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables);
* drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state
* @dev: DRM device
* @state: atomic state object with old state structures
+ * @intr: if true, do an interruptible wait
*
* For implicit sync, driver should fish the exclusive fence out from the
* incoming fb's and stash it in the drm_plane_state. This is called after
* drm_atomic_helper_swap_state() so it uses the current plane state (and
* just uses the atomic state to find the changed planes)
+ *
+ * Returns zero if sucess or < 0 if fence_wait() fails.
*/
-void drm_atomic_helper_wait_for_fences(struct drm_device *dev,
- struct drm_atomic_state *state)
+int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
+ struct drm_atomic_state *state,
+ bool intr)
{
struct drm_plane *plane;
struct drm_plane_state *plane_state;
- int i;
+ int i, ret;

for_each_plane_in_state(state, plane, plane_state, i) {
if (!plane->state->fence)
@@ -1026,10 +1030,15 @@ void drm_atomic_helper_wait_for_fences(struct drm_device *dev,

WARN_ON(!plane->state->fb);

- fence_wait(plane->state->fence, false);
+ ret = fence_wait(plane->state->fence, intr);
+ if (ret)
+ return ret;
+
fence_put(plane->state->fence);
plane->state->fence = NULL;
}
+
+ return 0;
}
EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences);

@@ -1176,7 +1185,7 @@ static void commit_tail(struct drm_atomic_state *state)

funcs = dev->mode_config.helper_private;

- drm_atomic_helper_wait_for_fences(dev, state);
+ drm_atomic_helper_wait_for_fences(dev, state, false);

drm_atomic_helper_wait_for_dependencies(state);

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 4a8a6f1..9518e43 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -112,7 +112,7 @@ static void complete_commit(struct msm_commit *c, bool async)
struct msm_drm_private *priv = dev->dev_private;
struct msm_kms *kms = priv->kms;

- drm_atomic_helper_wait_for_fences(dev, state);
+ drm_atomic_helper_wait_for_fences(dev, state, false);

kms->funcs->prepare_commit(kms, state);

diff --git a/include/drm/drm_atomic_helper.h b/include/drm/drm_atomic_helper.h
index d86ae5d..a42c34b 100644
--- a/include/drm/drm_atomic_helper.h
+++ b/include/drm/drm_atomic_helper.h
@@ -43,8 +43,9 @@ int drm_atomic_helper_commit(struct drm_device *dev,
struct drm_atomic_state *state,
bool nonblock);

-void drm_atomic_helper_wait_for_fences(struct drm_device *dev,
- struct drm_atomic_state *state);
+int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
+ struct drm_atomic_state *state,
+ bool intr);
bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev,
struct drm_atomic_state *old_state,
struct drm_crtc *crtc);
--
2.5.5
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