diff options
Diffstat (limited to 'drivers/gpu/drm/drm_atomic_helper.c')
| -rw-r--r-- | drivers/gpu/drm/drm_atomic_helper.c | 171 |
1 files changed, 61 insertions, 110 deletions
diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 4e26b73bb0d5..c3994b4d5f32 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -2077,6 +2077,7 @@ EXPORT_SYMBOL(drm_atomic_helper_swap_state); * @src_y: y offset of @fb for panning * @src_w: width of source rectangle in @fb * @src_h: height of source rectangle in @fb + * @ctx: lock acquire context * * Provides a default plane update handler using the atomic driver interface. * @@ -2089,7 +2090,8 @@ int drm_atomic_helper_update_plane(struct drm_plane *plane, int crtc_x, int crtc_y, unsigned int crtc_w, unsigned int crtc_h, 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) { struct drm_atomic_state *state; struct drm_plane_state *plane_state; @@ -2099,8 +2101,7 @@ int drm_atomic_helper_update_plane(struct drm_plane *plane, if (!state) return -ENOMEM; - state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); -retry: + state->acquire_ctx = ctx; plane_state = drm_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) { ret = PTR_ERR(plane_state); @@ -2125,59 +2126,33 @@ retry: ret = drm_atomic_commit(state); fail: - if (ret == -EDEADLK) - goto backoff; - drm_atomic_state_put(state); return ret; - -backoff: - drm_atomic_state_clear(state); - drm_atomic_legacy_backoff(state); - - /* - * Someone might have exchanged the framebuffer while we dropped locks - * in the backoff code. We need to fix up the fb refcount tracking the - * core does for us. - */ - plane->old_fb = plane->fb; - - goto retry; } EXPORT_SYMBOL(drm_atomic_helper_update_plane); /** * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic * @plane: plane to disable + * @ctx: lock acquire context * * Provides a default plane disable handler using the atomic driver interface. * * RETURNS: * Zero on success, error code on failure */ -int drm_atomic_helper_disable_plane(struct drm_plane *plane) +int drm_atomic_helper_disable_plane(struct drm_plane *plane, + struct drm_modeset_acquire_ctx *ctx) { struct drm_atomic_state *state; struct drm_plane_state *plane_state; int ret = 0; - /* - * FIXME: Without plane->crtc set we can't get at the implicit legacy - * acquire context. The real fix will be to wire the acquire ctx through - * everywhere we need it, but meanwhile prevent chaos by just skipping - * this noop. The critical case is the cursor ioctls which a) only grab - * crtc/cursor-plane locks (so we need the crtc to get at the right - * acquire context) and b) can try to disable the plane multiple times. - */ - if (!plane->crtc) - return 0; - state = drm_atomic_state_alloc(plane->dev); if (!state) return -ENOMEM; - state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); -retry: + state->acquire_ctx = ctx; plane_state = drm_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) { ret = PTR_ERR(plane_state); @@ -2193,24 +2168,8 @@ retry: ret = drm_atomic_commit(state); fail: - if (ret == -EDEADLK) - goto backoff; - drm_atomic_state_put(state); return ret; - -backoff: - drm_atomic_state_clear(state); - drm_atomic_legacy_backoff(state); - - /* - * Someone might have exchanged the framebuffer while we dropped locks - * in the backoff code. We need to fix up the fb refcount tracking the - * core does for us. - */ - plane->old_fb = plane->fb; - - goto retry; } EXPORT_SYMBOL(drm_atomic_helper_disable_plane); @@ -2306,6 +2265,7 @@ static int update_output_state(struct drm_atomic_state *state, /** * drm_atomic_helper_set_config - set a new config from userspace * @set: mode set configuration + * @ctx: lock acquisition context * * Provides a default crtc set_config handler using the atomic driver interface. * @@ -2318,7 +2278,8 @@ static int update_output_state(struct drm_atomic_state *state, * Returns: * Returns 0 on success, negative errno numbers on failure. */ -int drm_atomic_helper_set_config(struct drm_mode_set *set) +int drm_atomic_helper_set_config(struct drm_mode_set *set, + struct drm_modeset_acquire_ctx *ctx) { struct drm_atomic_state *state; struct drm_crtc *crtc = set->crtc; @@ -2329,32 +2290,16 @@ int drm_atomic_helper_set_config(struct drm_mode_set *set) return -ENOMEM; state->legacy_set_config = true; - state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); -retry: + state->acquire_ctx = ctx; ret = __drm_atomic_helper_set_config(set, state); if (ret != 0) goto fail; ret = drm_atomic_commit(state); -fail: - if (ret == -EDEADLK) - goto backoff; +fail: drm_atomic_state_put(state); return ret; - -backoff: - drm_atomic_state_clear(state); - drm_atomic_legacy_backoff(state); - - /* - * Someone might have exchanged the framebuffer while we dropped locks - * in the backoff code. We need to fix up the fb refcount tracking the - * core does for us. - */ - crtc->primary->old_fb = crtc->primary->fb; - - goto retry; } EXPORT_SYMBOL(drm_atomic_helper_set_config); @@ -2443,7 +2388,8 @@ commit: * that they are connected to. * * This is used for example in suspend/resume to disable all currently active - * functions when suspending. + * functions when suspending. If you just want to shut down everything at e.g. + * driver unload, look at drm_atomic_helper_shutdown(). * * Note that if callers haven't already acquired all modeset locks this might * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). @@ -2452,7 +2398,8 @@ commit: * 0 on success or a negative error code on failure. * * See also: - * drm_atomic_helper_suspend(), drm_atomic_helper_resume() + * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and + * drm_atomic_helper_shutdown(). */ int drm_atomic_helper_disable_all(struct drm_device *dev, struct drm_modeset_acquire_ctx *ctx) @@ -2517,6 +2464,42 @@ free: EXPORT_SYMBOL(drm_atomic_helper_disable_all); /** + * drm_atomic_helper_shutdown - shutdown all CRTC + * @dev: DRM device + * + * This shuts down all CRTC, which is useful for driver unloading. Shutdown on + * suspend should instead be handled with drm_atomic_helper_suspend(), since + * that also takes a snapshot of the modeset state to be restored on resume. + * + * This is just a convenience wrapper around drm_atomic_helper_disable_all(), + * and it is the atomic version of drm_crtc_force_disable_all(). + */ +void drm_atomic_helper_shutdown(struct drm_device *dev) +{ + struct drm_modeset_acquire_ctx ctx; + int ret; + + drm_modeset_acquire_init(&ctx, 0); + while (1) { + ret = drm_modeset_lock_all_ctx(dev, &ctx); + if (!ret) + ret = drm_atomic_helper_disable_all(dev, &ctx); + + if (ret != -EDEADLK) + break; + + drm_modeset_backoff(&ctx); + } + + if (ret) + DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret); + + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); +} +EXPORT_SYMBOL(drm_atomic_helper_shutdown); + +/** * drm_atomic_helper_suspend - subsystem-level suspend helper * @dev: DRM device * @@ -2862,6 +2845,7 @@ static int page_flip_common( * @fb: DRM framebuffer * @event: optional DRM event to signal upon completion * @flags: flip flags for non-vblank sync'ed updates + * @ctx: lock acquisition context * * Provides a default &drm_crtc_funcs.page_flip implementation * using the atomic driver interface. @@ -2875,7 +2859,8 @@ static int page_flip_common( int drm_atomic_helper_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, - uint32_t flags) + uint32_t flags, + struct drm_modeset_acquire_ctx *ctx) { struct drm_plane *plane = crtc->primary; struct drm_atomic_state *state; @@ -2885,34 +2870,16 @@ int drm_atomic_helper_page_flip(struct drm_crtc *crtc, if (!state) return -ENOMEM; - state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); + state->acquire_ctx = ctx; -retry: ret = page_flip_common(state, crtc, fb, event, flags); if (ret != 0) goto fail; ret = drm_atomic_nonblocking_commit(state); - fail: - if (ret == -EDEADLK) - goto backoff; - drm_atomic_state_put(state); return ret; - -backoff: - drm_atomic_state_clear(state); - drm_atomic_legacy_backoff(state); - - /* - * Someone might have exchanged the framebuffer while we dropped locks - * in the backoff code. We need to fix up the fb refcount tracking the - * core does for us. - */ - plane->old_fb = plane->fb; - - goto retry; } EXPORT_SYMBOL(drm_atomic_helper_page_flip); @@ -2923,6 +2890,7 @@ EXPORT_SYMBOL(drm_atomic_helper_page_flip); * @event: optional DRM event to signal upon completion * @flags: flip flags for non-vblank sync'ed updates * @target: specifying the target vblank period when the flip to take effect + * @ctx: lock acquisition context * * Provides a default &drm_crtc_funcs.page_flip_target implementation. * Similar to drm_atomic_helper_page_flip() with extra parameter to specify @@ -2936,7 +2904,8 @@ int drm_atomic_helper_page_flip_target( struct drm_framebuffer *fb, struct drm_pending_vblank_event *event, uint32_t flags, - uint32_t target) + uint32_t target, + struct drm_modeset_acquire_ctx *ctx) { struct drm_plane *plane = crtc->primary; struct drm_atomic_state *state; @@ -2947,9 +2916,8 @@ int drm_atomic_helper_page_flip_target( if (!state) return -ENOMEM; - state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); + state->acquire_ctx = ctx; -retry: ret = page_flip_common(state, crtc, fb, event, flags); if (ret != 0) goto fail; @@ -2962,26 +2930,9 @@ retry: crtc_state->target_vblank = target; ret = drm_atomic_nonblocking_commit(state); - fail: - if (ret == -EDEADLK) - goto backoff; - drm_atomic_state_put(state); return ret; - -backoff: - drm_atomic_state_clear(state); - drm_atomic_legacy_backoff(state); - - /* - * Someone might have exchanged the framebuffer while we dropped locks - * in the backoff code. We need to fix up the fb refcount tracking the - * core does for us. - */ - plane->old_fb = plane->fb; - - goto retry; } EXPORT_SYMBOL(drm_atomic_helper_page_flip_target); |