| 1 | // SPDX-License-Identifier: MIT |
|---|---|
| 2 | /* |
| 3 | * Copyright © 2023 Intel Corporation |
| 4 | */ |
| 5 | |
| 6 | #include <drm/drm_modeset_lock.h> |
| 7 | |
| 8 | #include "intel_display_types.h" |
| 9 | #include "intel_modeset_lock.h" |
| 10 | |
| 11 | void _intel_modeset_lock_begin(struct drm_modeset_acquire_ctx *ctx, |
| 12 | struct intel_atomic_state *state, |
| 13 | unsigned int flags, int *ret) |
| 14 | { |
| 15 | drm_modeset_acquire_init(ctx, flags); |
| 16 | |
| 17 | if (state) |
| 18 | state->base.acquire_ctx = ctx; |
| 19 | |
| 20 | *ret = -EDEADLK; |
| 21 | } |
| 22 | |
| 23 | bool _intel_modeset_lock_loop(int *ret) |
| 24 | { |
| 25 | if (*ret == -EDEADLK) { |
| 26 | *ret = 0; |
| 27 | return true; |
| 28 | } |
| 29 | |
| 30 | return false; |
| 31 | } |
| 32 | |
| 33 | void _intel_modeset_lock_end(struct drm_modeset_acquire_ctx *ctx, |
| 34 | struct intel_atomic_state *state, |
| 35 | int *ret) |
| 36 | { |
| 37 | if (*ret == -EDEADLK) { |
| 38 | if (state) |
| 39 | drm_atomic_state_clear(state: &state->base); |
| 40 | |
| 41 | *ret = drm_modeset_backoff(ctx); |
| 42 | if (*ret == 0) { |
| 43 | *ret = -EDEADLK; |
| 44 | return; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | drm_modeset_drop_locks(ctx); |
| 49 | drm_modeset_acquire_fini(ctx); |
| 50 | } |
| 51 |