[RFC PATCH 1/5] drm/i915: Always wait for flip_done

Maarten Lankhorst
2017-08-30T12:17:48Z

The next commit removes the wait for flip_done in in
drm_atomic_helper_commit_cleanup_done, but we need it for the tests
to pass. Instead of using complicated vblank tracking which ends
up being ignored anyway, call the correct atomic helper. :)

RFC because I'm not completely sure what we want to do with the vblank waiting,
I think for now this patch is the right way to go until we decide because it
preserves the status quo when drm_crtc_commit was introduced.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
drivers/gpu/drm/i915/i915_drv.h | 3 +-
drivers/gpu/drm/i915/intel_display.c | 83 +++---------------------------------
2 files changed, 8 insertions(+), 78 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index cbbafbfb0a55..de19621864a9 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -707,8 +707,7 @@ struct drm_i915_display_funcs {
struct drm_atomic_state *old_state);
void (*crtc_disable)(struct intel_crtc_state *old_crtc_state,
struct drm_atomic_state *old_state);
- void (*update_crtcs)(struct drm_atomic_state *state,
- unsigned int *crtc_vblank_mask);
+ void (*update_crtcs)(struct drm_atomic_state *state);
void (*audio_codec_enable)(struct drm_connector *connector,
struct intel_encoder *encoder,
const struct drm_display_mode *adjusted_mode);
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 52c73b4dabaa..3f3cb96aa11e 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12114,73 +12114,10 @@ u32 intel_crtc_get_vblank_counter(struct intel_crtc *crtc)
return dev->driver->get_vblank_counter(dev, crtc->pipe);
}

-static void intel_atomic_wait_for_vblanks(struct drm_device *dev,
- struct drm_i915_private *dev_priv,
- unsigned crtc_mask)
-{
- unsigned last_vblank_count[I915_MAX_PIPES];
- enum pipe pipe;
- int ret;
-
- if (!crtc_mask)
- return;
-
- for_each_pipe(dev_priv, pipe) {
- struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv,
- pipe);
-
- if (!((1 << pipe) & crtc_mask))
- continue;
-
- ret = drm_crtc_vblank_get(&crtc->base);
- if (WARN_ON(ret != 0)) {
- crtc_mask &= ~(1 << pipe);
- continue;
- }
-
- last_vblank_count[pipe] = drm_crtc_vblank_count(&crtc->base);
- }
-
- for_each_pipe(dev_priv, pipe) {
- struct intel_crtc *crtc = intel_get_crtc_for_pipe(dev_priv,
- pipe);
- long lret;
-
- if (!((1 << pipe) & crtc_mask))
- continue;
-
- lret = wait_event_timeout(dev->vblank[pipe].queue,
- last_vblank_count[pipe] !=
- drm_crtc_vblank_count(&crtc->base),
- msecs_to_jiffies(50));
-
- WARN(!lret, "pipe %c vblank wait timed out\n", pipe_name(pipe));
-
- drm_crtc_vblank_put(&crtc->base);
- }
-}
-
-static bool needs_vblank_wait(struct intel_crtc_state *crtc_state)
-{
- /* fb updated, need to unpin old fb */
- if (crtc_state->fb_changed)
- return true;
-
- /* wm changes, need vblank before final wm's */
- if (crtc_state->update_wm_post)
- return true;
-
- if (crtc_state->wm.need_postvbl_update)
- return true;
-
- return false;
-}
-
static void intel_update_crtc(struct drm_crtc *crtc,
struct drm_atomic_state *state,
struct drm_crtc_state *old_crtc_state,
- struct drm_crtc_state *new_crtc_state,
- unsigned int *crtc_vblank_mask)
+ struct drm_crtc_state *new_crtc_state)
{
struct drm_device *dev = crtc->dev;
struct drm_i915_private *dev_priv = to_i915(dev);
@@ -12203,13 +12140,9 @@ static void intel_update_crtc(struct drm_crtc *crtc,
}

drm_atomic_helper_commit_planes_on_crtc(old_crtc_state);
-
- if (needs_vblank_wait(pipe_config))
- *crtc_vblank_mask |= drm_crtc_mask(crtc);
}

-static void intel_update_crtcs(struct drm_atomic_state *state,
- unsigned int *crtc_vblank_mask)
+static void intel_update_crtcs(struct drm_atomic_state *state)
{
struct drm_crtc *crtc;
struct drm_crtc_state *old_crtc_state, *new_crtc_state;
@@ -12220,12 +12153,11 @@ static void intel_update_crtcs(struct drm_atomic_state *state,
continue;

intel_update_crtc(crtc, state, old_crtc_state,
- new_crtc_state, crtc_vblank_mask);
+ new_crtc_state);
}
}

-static void skl_update_crtcs(struct drm_atomic_state *state,
- unsigned int *crtc_vblank_mask)
+static void skl_update_crtcs(struct drm_atomic_state *state)
{
struct drm_i915_private *dev_priv = to_i915(state->dev);
struct intel_atomic_state *intel_state = to_intel_atomic_state(state);
@@ -12284,7 +12216,7 @@ static void skl_update_crtcs(struct drm_atomic_state *state,
vbl_wait = true;

intel_update_crtc(crtc, state, old_crtc_state,
- new_crtc_state, crtc_vblank_mask);
+ new_crtc_state);

if (vbl_wait)
intel_wait_for_vblank(dev_priv, pipe);
@@ -12346,7 +12278,6 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
struct intel_crtc_state *intel_cstate;
bool hw_check = intel_state->modeset;
u64 put_domains[I915_MAX_PIPES] = {};
- unsigned crtc_vblank_mask = 0;
int i;

intel_atomic_commit_fence_wait(intel_state);
@@ -12438,7 +12369,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
pm_qos_update_request(&dev_priv->pm_qos_atomic, 0);

/* Now enable the clocks, plane, pipe, and connectors that we set up. */
- dev_priv->display.update_crtcs(state, &crtc_vblank_mask);
+ dev_priv->display.update_crtcs(state);

/* FIXME: We should call drm_atomic_helper_commit_hw_done() here
* already, but still need the state for the delayed optimization. To
@@ -12450,7 +12381,7 @@ static void intel_atomic_commit_tail(struct drm_atomic_state *state)
* we don't need out special handling any more.
*/
if (!state->legacy_cursor_update)
- intel_atomic_wait_for_vblanks(dev, dev_priv, crtc_vblank_mask);
+ drm_atomic_helper_wait_for_flip_done(dev, state);

/*
* Now that the vblank has passed, we can go ahead and program the
--
2.11.0

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