[Intel-gfx] [PATCH 02/15] drm: Remove drm_modeset_(un)lock_crtc
Daniel Vetter
daniel.vetter at ffwll.ch
Mon Apr 3 08:32:51 UTC 2017
The last user, the cursor ioctl, can just open-code this too. We
simply have to move the acquire ctx dance from the universal function
up into the top-level ioctl handler.
Reviewed-by: Harry Wentland <harry.wentland at amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
drivers/gpu/drm/drm_crtc_internal.h | 3 --
drivers/gpu/drm/drm_modeset_lock.c | 67 -------------------------------------
drivers/gpu/drm/drm_plane.c | 49 +++++++++++++--------------
include/drm/drm_modeset_lock.h | 1 -
4 files changed, 24 insertions(+), 96 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc_internal.h b/drivers/gpu/drm/drm_crtc_internal.h
index de1047530e07..8c04275cf226 100644
--- a/drivers/gpu/drm/drm_crtc_internal.h
+++ b/drivers/gpu/drm/drm_crtc_internal.h
@@ -61,9 +61,6 @@ int drm_mode_getresources(struct drm_device *dev,
void *data, struct drm_file *file_priv);
-/* drm_modeset_lock.c */
-void drm_modeset_lock_crtc(struct drm_crtc *crtc,
- struct drm_plane *plane);
/* drm_dumb_buffers.c */
/* IOCTLs */
int drm_mode_create_dumb_ioctl(struct drm_device *dev,
diff --git a/drivers/gpu/drm/drm_modeset_lock.c b/drivers/gpu/drm/drm_modeset_lock.c
index c94eff9d7544..c3ca6b859236 100644
--- a/drivers/gpu/drm/drm_modeset_lock.c
+++ b/drivers/gpu/drm/drm_modeset_lock.c
@@ -148,51 +148,6 @@ void drm_modeset_unlock_all(struct drm_device *dev)
}
EXPORT_SYMBOL(drm_modeset_unlock_all);
-void drm_modeset_lock_crtc(struct drm_crtc *crtc,
- struct drm_plane *plane)
-{
- struct drm_modeset_acquire_ctx *ctx;
- int ret;
-
- ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
- if (WARN_ON(!ctx))
- return;
-
- drm_modeset_acquire_init(ctx, 0);
-
-retry:
- ret = drm_modeset_lock(&crtc->mutex, ctx);
- if (ret)
- goto fail;
-
- if (plane) {
- ret = drm_modeset_lock(&plane->mutex, ctx);
- if (ret)
- goto fail;
-
- if (plane->crtc) {
- ret = drm_modeset_lock(&plane->crtc->mutex, ctx);
- if (ret)
- goto fail;
- }
- }
-
- WARN_ON(crtc->acquire_ctx);
-
- /* now we hold the locks, so now that it is safe, stash the
- * ctx for drm_modeset_unlock_crtc():
- */
- crtc->acquire_ctx = ctx;
-
- return;
-
-fail:
- if (ret == -EDEADLK) {
- drm_modeset_backoff(ctx);
- goto retry;
- }
-}
-
/**
* drm_modeset_legacy_acquire_ctx - find acquire ctx for legacy ioctls
* @crtc: drm crtc
@@ -215,28 +170,6 @@ drm_modeset_legacy_acquire_ctx(struct drm_crtc *crtc)
EXPORT_SYMBOL(drm_modeset_legacy_acquire_ctx);
/**
- * drm_modeset_unlock_crtc - drop crtc lock
- * @crtc: drm crtc
- *
- * This drops the crtc lock acquire with drm_modeset_lock_crtc() and all other
- * locks acquired through the hidden context.
- */
-void drm_modeset_unlock_crtc(struct drm_crtc *crtc)
-{
- struct drm_modeset_acquire_ctx *ctx = crtc->acquire_ctx;
-
- if (WARN_ON(!ctx))
- return;
-
- crtc->acquire_ctx = NULL;
- drm_modeset_drop_locks(ctx);
- drm_modeset_acquire_fini(ctx);
-
- kfree(ctx);
-}
-EXPORT_SYMBOL(drm_modeset_unlock_crtc);
-
-/**
* drm_warn_on_modeset_not_all_locked - check that all modeset locks are locked
* @dev: device
*
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index bc71aa2b7872..838ca742a28b 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -620,7 +620,8 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
static int drm_mode_cursor_universal(struct drm_crtc *crtc,
struct drm_mode_cursor2 *req,
- struct drm_file *file_priv)
+ struct drm_file *file_priv,
+ struct drm_modeset_acquire_ctx *ctx)
{
struct drm_device *dev = crtc->dev;
struct drm_framebuffer *fb = NULL;
@@ -634,21 +635,11 @@ static int drm_mode_cursor_universal(struct drm_crtc *crtc,
int32_t crtc_x, crtc_y;
uint32_t crtc_w = 0, crtc_h = 0;
uint32_t src_w = 0, src_h = 0;
- struct drm_modeset_acquire_ctx ctx;
int ret = 0;
BUG_ON(!crtc->cursor);
WARN_ON(crtc->cursor->crtc != crtc && crtc->cursor->crtc != NULL);
- drm_modeset_acquire_init(&ctx, 0);
-retry:
- ret = drm_modeset_lock(&crtc->mutex, &ctx);
- if (ret)
- goto fail;
- ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx);
- if (ret)
- goto fail;
-
/*
* Obtain fb we'll be using (either new or existing) and take an extra
* reference to it if fb != null. setplane will take care of dropping
@@ -693,7 +684,7 @@ static int drm_mode_cursor_universal(struct drm_crtc *crtc,
*/
ret = __setplane_internal(crtc->cursor, crtc, fb,
crtc_x, crtc_y, crtc_w, crtc_h,
- 0, 0, src_w, src_h, &ctx);
+ 0, 0, src_w, src_h, ctx);
/* Update successful; save new cursor position, if necessary */
if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
@@ -701,15 +692,6 @@ static int drm_mode_cursor_universal(struct drm_crtc *crtc,
crtc->cursor_y = req->y;
}
-fail:
- if (ret == -EDEADLK) {
- drm_modeset_backoff(&ctx);
- goto retry;
- }
-
- drm_modeset_drop_locks(&ctx);
- drm_modeset_acquire_fini(&ctx);
-
return ret;
}
@@ -718,6 +700,7 @@ static int drm_mode_cursor_common(struct drm_device *dev,
struct drm_file *file_priv)
{
struct drm_crtc *crtc;
+ struct drm_modeset_acquire_ctx ctx;
int ret = 0;
if (!drm_core_check_feature(dev, DRIVER_MODESET))
@@ -732,14 +715,24 @@ static int drm_mode_cursor_common(struct drm_device *dev,
return -ENOENT;
}
+ drm_modeset_acquire_init(&ctx, 0);
+retry:
+ ret = drm_modeset_lock(&crtc->mutex, &ctx);
+ if (ret)
+ goto out;
+ ret = drm_modeset_lock(&crtc->cursor->mutex, &ctx);
+ if (ret)
+ goto out;
+
/*
* If this crtc has a universal cursor plane, call that plane's update
* handler rather than using legacy cursor handlers.
*/
- if (crtc->cursor)
- return drm_mode_cursor_universal(crtc, req, file_priv);
+ if (crtc->cursor) {
+ ret = drm_mode_cursor_universal(crtc, req, file_priv, &ctx);
+ goto out;
+ }
- drm_modeset_lock_crtc(crtc, crtc->cursor);
if (req->flags & DRM_MODE_CURSOR_BO) {
if (!crtc->funcs->cursor_set && !crtc->funcs->cursor_set2) {
ret = -ENXIO;
@@ -763,7 +756,13 @@ static int drm_mode_cursor_common(struct drm_device *dev,
}
}
out:
- drm_modeset_unlock_crtc(crtc);
+ if (ret == -EDEADLK) {
+ drm_modeset_backoff(&ctx);
+ goto retry;
+ }
+
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
return ret;
diff --git a/include/drm/drm_modeset_lock.h b/include/drm/drm_modeset_lock.h
index 88d35bfc9cd8..2bb065bf0593 100644
--- a/include/drm/drm_modeset_lock.h
+++ b/include/drm/drm_modeset_lock.h
@@ -121,7 +121,6 @@ struct drm_plane;
void drm_modeset_lock_all(struct drm_device *dev);
void drm_modeset_unlock_all(struct drm_device *dev);
-void drm_modeset_unlock_crtc(struct drm_crtc *crtc);
void drm_warn_on_modeset_not_all_locked(struct drm_device *dev);
struct drm_modeset_acquire_ctx *
drm_modeset_legacy_acquire_ctx(struct drm_crtc *crtc);
--
2.11.0
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