From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- drivers/gpu/drm/msm/msm_atomic.c | 311 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 311 insertions(+) create mode 100644 drivers/gpu/drm/msm/msm_atomic.c (limited to 'drivers/gpu/drm/msm/msm_atomic.c') diff --git a/drivers/gpu/drm/msm/msm_atomic.c b/drivers/gpu/drm/msm/msm_atomic.c new file mode 100644 index 0000000000..9c45d641b5 --- /dev/null +++ b/drivers/gpu/drm/msm/msm_atomic.c @@ -0,0 +1,311 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2014 Red Hat + * Author: Rob Clark + */ + +#include +#include + +#include "msm_atomic_trace.h" +#include "msm_drv.h" +#include "msm_gem.h" +#include "msm_kms.h" + +/* + * Helpers to control vblanks while we flush.. basically just to ensure + * that vblank accounting is switched on, so we get valid seqn/timestamp + * on pageflip events (if requested) + */ + +static void vblank_get(struct msm_kms *kms, unsigned crtc_mask) +{ + struct drm_crtc *crtc; + + for_each_crtc_mask(kms->dev, crtc, crtc_mask) { + if (!crtc->state->active) + continue; + drm_crtc_vblank_get(crtc); + } +} + +static void vblank_put(struct msm_kms *kms, unsigned crtc_mask) +{ + struct drm_crtc *crtc; + + for_each_crtc_mask(kms->dev, crtc, crtc_mask) { + if (!crtc->state->active) + continue; + drm_crtc_vblank_put(crtc); + } +} + +static void lock_crtcs(struct msm_kms *kms, unsigned int crtc_mask) +{ + int crtc_index; + struct drm_crtc *crtc; + + for_each_crtc_mask(kms->dev, crtc, crtc_mask) { + crtc_index = drm_crtc_index(crtc); + mutex_lock_nested(&kms->commit_lock[crtc_index], crtc_index); + } +} + +static void unlock_crtcs(struct msm_kms *kms, unsigned int crtc_mask) +{ + struct drm_crtc *crtc; + + for_each_crtc_mask_reverse(kms->dev, crtc, crtc_mask) + mutex_unlock(&kms->commit_lock[drm_crtc_index(crtc)]); +} + +static void msm_atomic_async_commit(struct msm_kms *kms, int crtc_idx) +{ + unsigned crtc_mask = BIT(crtc_idx); + + trace_msm_atomic_async_commit_start(crtc_mask); + + lock_crtcs(kms, crtc_mask); + + if (!(kms->pending_crtc_mask & crtc_mask)) { + unlock_crtcs(kms, crtc_mask); + goto out; + } + + kms->pending_crtc_mask &= ~crtc_mask; + + kms->funcs->enable_commit(kms); + + vblank_get(kms, crtc_mask); + + /* + * Flush hardware updates: + */ + trace_msm_atomic_flush_commit(crtc_mask); + kms->funcs->flush_commit(kms, crtc_mask); + + /* + * Wait for flush to complete: + */ + trace_msm_atomic_wait_flush_start(crtc_mask); + kms->funcs->wait_flush(kms, crtc_mask); + trace_msm_atomic_wait_flush_finish(crtc_mask); + + vblank_put(kms, crtc_mask); + + kms->funcs->complete_commit(kms, crtc_mask); + unlock_crtcs(kms, crtc_mask); + kms->funcs->disable_commit(kms); + +out: + trace_msm_atomic_async_commit_finish(crtc_mask); +} + +static void msm_atomic_pending_work(struct kthread_work *work) +{ + struct msm_pending_timer *timer = container_of(work, + struct msm_pending_timer, work.work); + + msm_atomic_async_commit(timer->kms, timer->crtc_idx); +} + +int msm_atomic_init_pending_timer(struct msm_pending_timer *timer, + struct msm_kms *kms, int crtc_idx) +{ + timer->kms = kms; + timer->crtc_idx = crtc_idx; + + timer->worker = kthread_create_worker(0, "atomic-worker-%d", crtc_idx); + if (IS_ERR(timer->worker)) { + int ret = PTR_ERR(timer->worker); + timer->worker = NULL; + return ret; + } + sched_set_fifo(timer->worker->task); + + msm_hrtimer_work_init(&timer->work, timer->worker, + msm_atomic_pending_work, + CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + + return 0; +} + +void msm_atomic_destroy_pending_timer(struct msm_pending_timer *timer) +{ + if (timer->worker) + kthread_destroy_worker(timer->worker); +} + +static bool can_do_async(struct drm_atomic_state *state, + struct drm_crtc **async_crtc) +{ + struct drm_connector_state *connector_state; + struct drm_connector *connector; + struct drm_crtc_state *crtc_state; + struct drm_crtc *crtc; + int i, num_crtcs = 0; + + if (!(state->legacy_cursor_update || state->async_update)) + return false; + + /* any connector change, means slow path: */ + for_each_new_connector_in_state(state, connector, connector_state, i) + return false; + + for_each_new_crtc_in_state(state, crtc, crtc_state, i) { + if (drm_atomic_crtc_needs_modeset(crtc_state)) + return false; + if (!crtc_state->active) + return false; + if (++num_crtcs > 1) + return false; + *async_crtc = crtc; + } + + return true; +} + +/* Get bitmask of crtcs that will need to be flushed. The bitmask + * can be used with for_each_crtc_mask() iterator, to iterate + * effected crtcs without needing to preserve the atomic state. + */ +static unsigned get_crtc_mask(struct drm_atomic_state *state) +{ + struct drm_crtc_state *crtc_state; + struct drm_crtc *crtc; + unsigned i, mask = 0; + + for_each_new_crtc_in_state(state, crtc, crtc_state, i) + mask |= drm_crtc_mask(crtc); + + return mask; +} + +int msm_atomic_check(struct drm_device *dev, struct drm_atomic_state *state) +{ + struct drm_crtc_state *old_crtc_state, *new_crtc_state; + struct drm_crtc *crtc; + int i; + + for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, + new_crtc_state, i) { + if ((old_crtc_state->ctm && !new_crtc_state->ctm) || + (!old_crtc_state->ctm && new_crtc_state->ctm)) { + new_crtc_state->mode_changed = true; + state->allow_modeset = true; + } + } + + return drm_atomic_helper_check(dev, state); +} + +void msm_atomic_commit_tail(struct drm_atomic_state *state) +{ + struct drm_device *dev = state->dev; + struct msm_drm_private *priv = dev->dev_private; + struct msm_kms *kms = priv->kms; + struct drm_crtc *async_crtc = NULL; + unsigned crtc_mask = get_crtc_mask(state); + bool async = can_do_async(state, &async_crtc); + + trace_msm_atomic_commit_tail_start(async, crtc_mask); + + kms->funcs->enable_commit(kms); + + /* + * Ensure any previous (potentially async) commit has + * completed: + */ + lock_crtcs(kms, crtc_mask); + trace_msm_atomic_wait_flush_start(crtc_mask); + kms->funcs->wait_flush(kms, crtc_mask); + trace_msm_atomic_wait_flush_finish(crtc_mask); + + /* + * Now that there is no in-progress flush, prepare the + * current update: + */ + if (kms->funcs->prepare_commit) + kms->funcs->prepare_commit(kms, state); + + /* + * Push atomic updates down to hardware: + */ + drm_atomic_helper_commit_modeset_disables(dev, state); + drm_atomic_helper_commit_planes(dev, state, 0); + drm_atomic_helper_commit_modeset_enables(dev, state); + + if (async) { + struct msm_pending_timer *timer = + &kms->pending_timers[drm_crtc_index(async_crtc)]; + + /* async updates are limited to single-crtc updates: */ + WARN_ON(crtc_mask != drm_crtc_mask(async_crtc)); + + /* + * Start timer if we don't already have an update pending + * on this crtc: + */ + if (!(kms->pending_crtc_mask & crtc_mask)) { + ktime_t vsync_time, wakeup_time; + + kms->pending_crtc_mask |= crtc_mask; + + if (drm_crtc_next_vblank_start(async_crtc, &vsync_time)) + goto fallback; + + wakeup_time = ktime_sub(vsync_time, ms_to_ktime(1)); + + msm_hrtimer_queue_work(&timer->work, wakeup_time, + HRTIMER_MODE_ABS); + } + + kms->funcs->disable_commit(kms); + unlock_crtcs(kms, crtc_mask); + /* + * At this point, from drm core's perspective, we + * are done with the atomic update, so we can just + * go ahead and signal that it is done: + */ + drm_atomic_helper_commit_hw_done(state); + drm_atomic_helper_cleanup_planes(dev, state); + + trace_msm_atomic_commit_tail_finish(async, crtc_mask); + + return; + } + +fallback: + /* + * If there is any async flush pending on updated crtcs, fold + * them into the current flush. + */ + kms->pending_crtc_mask &= ~crtc_mask; + + vblank_get(kms, crtc_mask); + + /* + * Flush hardware updates: + */ + trace_msm_atomic_flush_commit(crtc_mask); + kms->funcs->flush_commit(kms, crtc_mask); + unlock_crtcs(kms, crtc_mask); + /* + * Wait for flush to complete: + */ + trace_msm_atomic_wait_flush_start(crtc_mask); + kms->funcs->wait_flush(kms, crtc_mask); + trace_msm_atomic_wait_flush_finish(crtc_mask); + + vblank_put(kms, crtc_mask); + + lock_crtcs(kms, crtc_mask); + kms->funcs->complete_commit(kms, crtc_mask); + unlock_crtcs(kms, crtc_mask); + kms->funcs->disable_commit(kms); + + drm_atomic_helper_commit_hw_done(state); + drm_atomic_helper_cleanup_planes(dev, state); + + trace_msm_atomic_commit_tail_finish(async, crtc_mask); +} -- cgit v1.2.3