mirror of https://gitee.com/openkylin/linux.git
220 lines
5.8 KiB
C
220 lines
5.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#include "vkms_drv.h"
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_probe_helper.h>
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static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
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{
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struct vkms_output *output = container_of(timer, struct vkms_output,
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vblank_hrtimer);
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struct drm_crtc *crtc = &output->crtc;
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struct vkms_crtc_state *state = to_vkms_crtc_state(crtc->state);
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u64 ret_overrun;
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bool ret;
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spin_lock(&output->lock);
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ret = drm_crtc_handle_vblank(crtc);
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if (!ret)
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DRM_ERROR("vkms failure on handling vblank");
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if (state && output->crc_enabled) {
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u64 frame = drm_crtc_accurate_vblank_count(crtc);
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/* update frame_start only if a queued vkms_crc_work_handle()
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* has read the data
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*/
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spin_lock(&output->state_lock);
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if (!state->frame_start)
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state->frame_start = frame;
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spin_unlock(&output->state_lock);
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ret = queue_work(output->crc_workq, &state->crc_work);
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if (!ret)
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DRM_WARN("failed to queue vkms_crc_work_handle");
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}
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ret_overrun = hrtimer_forward_now(&output->vblank_hrtimer,
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output->period_ns);
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WARN_ON(ret_overrun != 1);
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spin_unlock(&output->lock);
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return HRTIMER_RESTART;
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}
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static int vkms_enable_vblank(struct drm_crtc *crtc)
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{
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struct drm_device *dev = crtc->dev;
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unsigned int pipe = drm_crtc_index(crtc);
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struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
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struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
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drm_calc_timestamping_constants(crtc, &crtc->mode);
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hrtimer_init(&out->vblank_hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
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out->vblank_hrtimer.function = &vkms_vblank_simulate;
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out->period_ns = ktime_set(0, vblank->framedur_ns);
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hrtimer_start(&out->vblank_hrtimer, out->period_ns, HRTIMER_MODE_REL);
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return 0;
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}
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static void vkms_disable_vblank(struct drm_crtc *crtc)
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{
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struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
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hrtimer_cancel(&out->vblank_hrtimer);
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}
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bool vkms_get_vblank_timestamp(struct drm_device *dev, unsigned int pipe,
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int *max_error, ktime_t *vblank_time,
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bool in_vblank_irq)
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{
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struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
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struct vkms_output *output = &vkmsdev->output;
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*vblank_time = output->vblank_hrtimer.node.expires;
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if (!in_vblank_irq)
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*vblank_time -= output->period_ns;
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return true;
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}
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static struct drm_crtc_state *
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vkms_atomic_crtc_duplicate_state(struct drm_crtc *crtc)
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{
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struct vkms_crtc_state *vkms_state;
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if (WARN_ON(!crtc->state))
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return NULL;
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vkms_state = kzalloc(sizeof(*vkms_state), GFP_KERNEL);
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if (!vkms_state)
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return NULL;
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__drm_atomic_helper_crtc_duplicate_state(crtc, &vkms_state->base);
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INIT_WORK(&vkms_state->crc_work, vkms_crc_work_handle);
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return &vkms_state->base;
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}
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static void vkms_atomic_crtc_destroy_state(struct drm_crtc *crtc,
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struct drm_crtc_state *state)
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{
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struct vkms_crtc_state *vkms_state = to_vkms_crtc_state(state);
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__drm_atomic_helper_crtc_destroy_state(state);
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if (vkms_state) {
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flush_work(&vkms_state->crc_work);
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kfree(vkms_state);
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}
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}
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static void vkms_atomic_crtc_reset(struct drm_crtc *crtc)
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{
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struct vkms_crtc_state *vkms_state =
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kzalloc(sizeof(*vkms_state), GFP_KERNEL);
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if (crtc->state)
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vkms_atomic_crtc_destroy_state(crtc, crtc->state);
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__drm_atomic_helper_crtc_reset(crtc, &vkms_state->base);
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if (vkms_state)
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INIT_WORK(&vkms_state->crc_work, vkms_crc_work_handle);
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}
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static const struct drm_crtc_funcs vkms_crtc_funcs = {
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.set_config = drm_atomic_helper_set_config,
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.destroy = drm_crtc_cleanup,
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.page_flip = drm_atomic_helper_page_flip,
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.reset = vkms_atomic_crtc_reset,
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.atomic_duplicate_state = vkms_atomic_crtc_duplicate_state,
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.atomic_destroy_state = vkms_atomic_crtc_destroy_state,
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.enable_vblank = vkms_enable_vblank,
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.disable_vblank = vkms_disable_vblank,
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.set_crc_source = vkms_set_crc_source,
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.verify_crc_source = vkms_verify_crc_source,
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};
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static void vkms_crtc_atomic_enable(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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drm_crtc_vblank_on(crtc);
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}
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static void vkms_crtc_atomic_disable(struct drm_crtc *crtc,
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struct drm_crtc_state *old_state)
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{
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drm_crtc_vblank_off(crtc);
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}
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static void vkms_crtc_atomic_begin(struct drm_crtc *crtc,
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struct drm_crtc_state *old_crtc_state)
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{
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struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc);
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/* This lock is held across the atomic commit to block vblank timer
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* from scheduling vkms_crc_work_handle until the crc_data is updated
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*/
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spin_lock_irq(&vkms_output->lock);
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}
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static void vkms_crtc_atomic_flush(struct drm_crtc *crtc,
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struct drm_crtc_state *old_crtc_state)
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{
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struct vkms_output *vkms_output = drm_crtc_to_vkms_output(crtc);
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unsigned long flags;
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if (crtc->state->event) {
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spin_lock_irqsave(&crtc->dev->event_lock, flags);
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if (drm_crtc_vblank_get(crtc) != 0)
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drm_crtc_send_vblank_event(crtc, crtc->state->event);
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else
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drm_crtc_arm_vblank_event(crtc, crtc->state->event);
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spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
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crtc->state->event = NULL;
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}
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spin_unlock_irq(&vkms_output->lock);
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}
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static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = {
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.atomic_begin = vkms_crtc_atomic_begin,
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.atomic_flush = vkms_crtc_atomic_flush,
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.atomic_enable = vkms_crtc_atomic_enable,
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.atomic_disable = vkms_crtc_atomic_disable,
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};
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int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
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struct drm_plane *primary, struct drm_plane *cursor)
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{
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struct vkms_output *vkms_out = drm_crtc_to_vkms_output(crtc);
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int ret;
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ret = drm_crtc_init_with_planes(dev, crtc, primary, cursor,
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&vkms_crtc_funcs, NULL);
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if (ret) {
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DRM_ERROR("Failed to init CRTC\n");
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return ret;
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}
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drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs);
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spin_lock_init(&vkms_out->lock);
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spin_lock_init(&vkms_out->state_lock);
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vkms_out->crc_workq = alloc_ordered_workqueue("vkms_crc_workq", 0);
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if (!vkms_out->crc_workq)
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return -ENOMEM;
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return ret;
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}
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