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Subject[PATCH v2 6/6] drm/msm: Switch to atomic_helper_commit()
Date
Now that all of the msm-specific goo is tucked safely away we can switch
over to using the atomic helper commit directly. \o/

Changes in v2:
- None

Cc: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
---
drivers/gpu/drm/msm/msm_atomic.c | 120 +------------------------------
drivers/gpu/drm/msm/msm_drv.c | 7 +-
drivers/gpu/drm/msm/msm_drv.h | 3 +-
3 files changed, 8 insertions(+), 122 deletions(-)

diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c
index 52249565cc03..d593ac3de1df 100644
--- a/drivers/gpu/drm/msm/msm_atomic.c
+++ b/drivers/gpu/drm/msm/msm_atomic.c
@@ -17,8 +17,6 @@

#include "msm_drv.h"
#include "msm_kms.h"
-#include "msm_gem.h"
-#include "msm_fence.h"

static void msm_atomic_wait_for_commit_done(struct drm_device *dev,
struct drm_atomic_state *old_state)
@@ -37,7 +35,7 @@ static void msm_atomic_wait_for_commit_done(struct drm_device *dev,
}
}

-static void msm_atomic_commit_tail(struct drm_atomic_state *state)
+void msm_atomic_commit_tail(struct drm_atomic_state *state)
{
struct drm_device *dev = state->dev;
struct msm_drm_private *priv = dev->dev_private;
@@ -74,119 +72,3 @@ static void msm_atomic_commit_tail(struct drm_atomic_state *state)

drm_atomic_helper_cleanup_planes(dev, state);
}
-
-/* The (potentially) asynchronous part of the commit. At this point
- * nothing can fail short of armageddon.
- */
-static void commit_tail(struct drm_atomic_state *state)
-{
- drm_atomic_helper_wait_for_fences(state->dev, state, false);
-
- drm_atomic_helper_wait_for_dependencies(state);
-
- msm_atomic_commit_tail(state);
-
- drm_atomic_helper_commit_cleanup_done(state);
-
- drm_atomic_state_put(state);
-}
-
-static void commit_work(struct work_struct *work)
-{
- struct drm_atomic_state *state = container_of(work,
- struct drm_atomic_state,
- commit_work);
- commit_tail(state);
-}
-
-/**
- * drm_atomic_helper_commit - commit validated state object
- * @dev: DRM device
- * @state: the driver state object
- * @nonblock: nonblocking commit
- *
- * This function commits a with drm_atomic_helper_check() pre-validated state
- * object. This can still fail when e.g. the framebuffer reservation fails.
- *
- * RETURNS
- * Zero for success or -errno.
- */
-int msm_atomic_commit(struct drm_device *dev,
- struct drm_atomic_state *state, bool nonblock)
-{
- struct msm_drm_private *priv = dev->dev_private;
- struct drm_crtc *crtc;
- struct drm_crtc_state *crtc_state;
- struct drm_plane *plane;
- struct drm_plane_state *old_plane_state, *new_plane_state;
- int i, ret;
-
- /*
- * Note that plane->atomic_async_check() should fail if we need
- * to re-assign hwpipe or anything that touches global atomic
- * state, so we'll never go down the async update path in those
- * cases.
- */
- if (state->async_update) {
- ret = drm_atomic_helper_prepare_planes(dev, state);
- if (ret)
- return ret;
-
- drm_atomic_helper_async_commit(dev, state);
- drm_atomic_helper_cleanup_planes(dev, state);
- return 0;
- }
-
- ret = drm_atomic_helper_setup_commit(state, nonblock);
- if (ret)
- return ret;
-
- INIT_WORK(&state->commit_work, commit_work);
-
- ret = drm_atomic_helper_prepare_planes(dev, state);
- if (ret)
- return ret;
-
- if (!nonblock) {
- ret = drm_atomic_helper_wait_for_fences(dev, state, true);
- if (ret)
- goto error;
- }
-
- /*
- * This is the point of no return - everything below never fails except
- * when the hw goes bonghits. Which means we can commit the new state on
- * the software side now.
- *
- * swap driver private state while still holding state_lock
- */
- BUG_ON(drm_atomic_helper_swap_state(state, true) < 0);
-
- /*
- * Everything below can be run asynchronously without the need to grab
- * any modeset locks at all under one conditions: It must be guaranteed
- * that the asynchronous work has either been cancelled (if the driver
- * supports it, which at least requires that the framebuffers get
- * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
- * before the new state gets committed on the software side with
- * drm_atomic_helper_swap_state().
- *
- * This scheme allows new atomic state updates to be prepared and
- * checked in parallel to the asynchronous completion of the previous
- * update. Which is important since compositors need to figure out the
- * composition of the next frame right after having submitted the
- * current layout.
- */
-
- drm_atomic_state_get(state);
- if (nonblock)
- queue_work(system_unbound_wq, &state->commit_work);
- else
- commit_tail(state);
-
- return 0;
-
-error:
- drm_atomic_helper_cleanup_planes(dev, state);
- return ret;
-}
diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index d1a45a68c287..eb5569d4dd57 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -41,7 +41,11 @@ static const struct drm_mode_config_funcs mode_config_funcs = {
.fb_create = msm_framebuffer_create,
.output_poll_changed = drm_fb_helper_output_poll_changed,
.atomic_check = drm_atomic_helper_check,
- .atomic_commit = msm_atomic_commit,
+ .atomic_commit = drm_atomic_helper_commit,
+};
+
+static const struct drm_mode_config_helper_funcs mode_config_helper_funcs = {
+ .atomic_commit_tail = msm_atomic_commit_tail,
};

static inline
@@ -520,6 +524,7 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
}

ddev->mode_config.funcs = &mode_config_funcs;
+ ddev->mode_config.helper_private = &mode_config_helper_funcs;

ret = drm_vblank_init(ddev, priv->num_crtcs);
if (ret < 0) {
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index b89fa5186eb8..3e89d7eac02f 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -156,8 +156,7 @@ struct msm_format {
uint32_t pixel_format;
};

-int msm_atomic_commit(struct drm_device *dev,
- struct drm_atomic_state *state, bool nonblock);
+void msm_atomic_commit_tail(struct drm_atomic_state *state);

void msm_gem_unmap_vma(struct msm_gem_address_space *aspace,
struct msm_gem_vma *vma, struct sg_table *sgt);
--
Sean Paul, Software Engineer, Google / Chromium OS
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