drm: Remove drm_modeset_legacy_acquire_ctx and crtc->acquire_ctx

With all the callers of drm_modeset_lock_crtc gone, and all the places
it was formerly used properly wiring the acquire ctx through, we can
remove this.

The only hidden context magic we still have is now the global one.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170403083304.9083-4-daniel.vetter@ffwll.ch

5 files changed, 4 insertions, 39 deletions

diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c
index 9b892af7811a..345310213820 100644
--- a/drivers/gpu/drm/drm_atomic.c
+++ b/drivers/gpu/drm/drm_atomic.c
@@ -1516,19 +1516,9 @@ EXPORT_SYMBOL(drm_atomic_add_affected_planes);
 void drm_atomic_legacy_backoff(struct drm_atomic_state *state)
 {
 	struct drm_device *dev = state->dev;
-	unsigned crtc_mask = 0;
-	struct drm_crtc *crtc;
 	int ret;
 	bool global = false;
 
-	drm_for_each_crtc(crtc, dev) {
-		if (crtc->acquire_ctx != state->acquire_ctx)
-			continue;
-
-		crtc_mask |= drm_crtc_mask(crtc);
-		crtc->acquire_ctx = NULL;
-	}
-
 	if (WARN_ON(dev->mode_config.acquire_ctx == state->acquire_ctx)) {
 		global = true;
 
@@ -1542,10 +1532,6 @@ retry:
 	if (ret)
 		goto retry;
 
-	drm_for_each_crtc(crtc, dev)
-		if (drm_crtc_mask(crtc) & crtc_mask)
-			crtc->acquire_ctx = state->acquire_ctx;
-
 	if (global)
 		dev->mode_config.acquire_ctx = state->acquire_ctx;
 }
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c
index c3994b4d5f32..3160d0881348 100644
--- a/drivers/gpu/drm/drm_atomic_helper.c
+++ b/drivers/gpu/drm/drm_atomic_helper.c
@@ -2975,7 +2975,7 @@ int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
 	if (!state)
 		return -ENOMEM;
 
-	state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
+	state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
 retry:
 	crtc_state = drm_atomic_get_crtc_state(state, crtc);
 	if (IS_ERR(crtc_state)) {
diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
index c3ca6b859236..64ef09a6cccb 100644
--- a/drivers/gpu/drm/drm_modeset_lock.c
+++ b/drivers/gpu/drm/drm_modeset_lock.c
@@ -149,27 +149,6 @@ void drm_modeset_unlock_all(struct drm_device *dev)
 EXPORT_SYMBOL(drm_modeset_unlock_all);
 
 /**
- * drm_modeset_legacy_acquire_ctx - find acquire ctx for legacy ioctls
- * @crtc: drm crtc
- *
- * Legacy ioctl operations like cursor updates or page flips only have per-crtc
- * locking, and store the acquire ctx in the corresponding crtc. All other
- * legacy operations take all locks and use a global acquire context. This
- * function grabs the right one.
- */
-struct drm_modeset_acquire_ctx *
-drm_modeset_legacy_acquire_ctx(struct drm_crtc *crtc)
-{
-	if (crtc->acquire_ctx)
-		return crtc->acquire_ctx;
-
-	WARN_ON(!crtc->dev->mode_config.acquire_ctx);
-
-	return crtc->dev->mode_config.acquire_ctx;
-}
-EXPORT_SYMBOL(drm_modeset_legacy_acquire_ctx);
-
-/**
  * drm_warn_on_modeset_not_all_locked - check that all modeset locks are locked
  * @dev: device
  *
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index e27ea89efd67..84abff3f43d9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -10715,7 +10715,7 @@ out_hang:
 		state = drm_atomic_state_alloc(dev);
 		if (!state)
 			return -ENOMEM;
-		state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
+		state->acquire_ctx = dev->mode_config.acquire_ctx;
 
 retry:
 		plane_state = drm_atomic_get_plane_state(state, primary);
@@ -13075,7 +13075,7 @@ void intel_crtc_restore_mode(struct drm_crtc *crtc)
 		return;
 	}
 
-	state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc);
+	state->acquire_ctx = crtc->dev->mode_config.acquire_ctx;
 
 retry:
 	crtc_state = drm_atomic_get_crtc_state(state, crtc);
diff --git a/drivers/gpu/drm/i915/intel_pipe_crc.c b/drivers/gpu/drm/i915/intel_pipe_crc.c
index 9fd9c70baeed..206ee4f0150e 100644
--- a/drivers/gpu/drm/i915/intel_pipe_crc.c
+++ b/drivers/gpu/drm/i915/intel_pipe_crc.c
@@ -522,7 +522,7 @@ static void hsw_trans_edp_pipe_A_crc_wa(struct drm_i915_private *dev_priv,
 		goto unlock;
 	}
 
-	state->acquire_ctx = drm_modeset_legacy_acquire_ctx(&crtc->base);
+	state->acquire_ctx = crtc->base.dev->mode_config.acquire_ctx;
 	pipe_config = intel_atomic_get_crtc_state(state, crtc);
 	if (IS_ERR(pipe_config)) {
 		ret = PTR_ERR(pipe_config);