This is just prep work to get an acquire ctx into every place where we
call ->update_plane or ->disable_plane.
v2: Keep the hidden acquire_ctx pointers valid while transitioning.
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
---
drivers/gpu/drm/drm_plane.c | 52
++++++++++++++++++++++++++++++++++++--------- 1 file changed, 42
insertions(+), 10 deletions(-)
diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index a22e76837065..0d04888172a7 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -457,7 +457,8 @@ static int __setplane_internal(struct drm_plane *plane,
uint32_t crtc_w, uint32_t crtc_h,
/* src_{x,y,w,h} values are 16.16 fixed point */
uint32_t src_x, uint32_t src_y,
- uint32_t src_w, uint32_t src_h)
+ uint32_t src_w, uint32_t src_h,
+ struct drm_modeset_acquire_ctx *ctx)
{
int ret = 0;
@@ -537,13 +538,26 @@ static int setplane_internal(struct drm_plane *plane,
uint32_t src_x, uint32_t src_y,
uint32_t src_w, uint32_t src_h)
{
+ struct drm_modeset_acquire_ctx ctx;
int ret;
- drm_modeset_lock_all(plane->dev);
+ drm_modeset_acquire_init(&ctx, 0);
+retry:
+ ret = drm_modeset_lock_all_ctx(plane->dev, &ctx);
+ if (ret)
+ goto fail;
+ plane->dev->mode_config.acquire_ctx = &ctx;
ret = __setplane_internal(plane, crtc, fb,
crtc_x, crtc_y, crtc_w, crtc_h,
- src_x, src_y, src_w, src_h);
- drm_modeset_unlock_all(plane->dev);
+ src_x, src_y, src_w, src_h, &ctx);
+
+fail:
+ if (ret == -EDEADLK) {
+ drm_modeset_backoff(&ctx);
+ goto retry;
+ }
+ drm_modeset_drop_locks(&ctx);
+ drm_modeset_acquire_fini(&ctx);
return ret;
}
@@ -613,11 +627,22 @@ 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;
+ crtc->acquire_ctx = &ctx;
+
/*
* 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
@@ -662,7 +687,7 @@ 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);
+ 0, 0, src_w, src_h, &ctx);
/* Update successful; save new cursor position, if necessary */
if (ret == 0 && req->flags & DRM_MODE_CURSOR_MOVE) {
@@ -670,6 +695,15 @@ 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;
}
@@ -696,12 +730,10 @@ static int drm_mode_cursor_common(struct drm_device
*dev, * If this crtc has a universal cursor plane, call that plane's update
* handler rather than using legacy cursor handlers.
*/
- drm_modeset_lock_crtc(crtc, crtc->cursor);
- if (crtc->cursor) {
- ret = drm_mode_cursor_universal(crtc, req, file_priv);
- goto out;
- }
+ if (crtc->cursor)
+ return drm_mode_cursor_universal(crtc, req, file_priv);
+ drm_modeset_lock_crtc(crtc, crtc->cursor);
