128 lines
3.4 KiB
C
128 lines
3.4 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_crtc_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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int ret_overrun;
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bool ret;
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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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ret_overrun = hrtimer_forward_now(&output->vblank_hrtimer,
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output->period_ns);
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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 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 = drm_atomic_helper_crtc_reset,
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.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
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.atomic_destroy_state = drm_atomic_helper_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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};
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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_flush(struct drm_crtc *crtc,
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struct drm_crtc_state *old_crtc_state)
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{
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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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}
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static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = {
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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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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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return ret;
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}
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