mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 23:55:36 +07:00
3a0709928b
This commit adds regular vblank events simulated through hrtimers, which is a feature required by VKMS to mimic real hardware. Additionally, all the vblank event send after pageflip is kept in the atomic_flush function. Changes since V1: - Compute the vblank timer interval per interruption Ville Syrjälä and Daniel Vetter: - Removes hardcoded vblank interval to get it from user space Changes since V2: Chris Wilson - Removes unnecessary algorithm to compute the next period Daniel Vetter: - Uses drm_calc_timestamping_constants to get the vblank interval instead of calculating it manually - Adds disable_vblank helper that turns of crtc - Simplifies implementation by using drm_crtc_arm_vblank_event - Replaces the code in atomic_begin to atomic_flush - Removes unnecessary field in vkms_output Changes since V3: Daniel Vetter: - Squash "drm/vkms: Add atomic helpers functions" into the commit that handling vblank events simulated by hrtimers Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/7709bba40782ec06332d57fff337797b272581fc.1531359228.git.rodrigosiqueiramelo@gmail.com
131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*/
|
|
|
|
#include "vkms_drv.h"
|
|
#include <drm/drm_atomic_helper.h>
|
|
#include <drm/drm_crtc_helper.h>
|
|
|
|
static enum hrtimer_restart vkms_vblank_simulate(struct hrtimer *timer)
|
|
{
|
|
struct vkms_output *output = container_of(timer, struct vkms_output,
|
|
vblank_hrtimer);
|
|
struct drm_crtc *crtc = &output->crtc;
|
|
int ret_overrun;
|
|
bool ret;
|
|
|
|
ret = drm_crtc_handle_vblank(crtc);
|
|
if (!ret)
|
|
DRM_ERROR("vkms failure on handling vblank");
|
|
|
|
ret_overrun = hrtimer_forward_now(&output->vblank_hrtimer,
|
|
output->period_ns);
|
|
|
|
return HRTIMER_RESTART;
|
|
}
|
|
|
|
static int vkms_enable_vblank(struct drm_crtc *crtc)
|
|
{
|
|
struct drm_device *dev = crtc->dev;
|
|
unsigned int pipe = drm_crtc_index(crtc);
|
|
struct drm_vblank_crtc *vblank = &dev->vblank[pipe];
|
|
struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
|
|
|
|
drm_calc_timestamping_constants(crtc, &crtc->mode);
|
|
|
|
hrtimer_init(&out->vblank_hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
|
|
out->vblank_hrtimer.function = &vkms_vblank_simulate;
|
|
out->period_ns = ktime_set(0, vblank->framedur_ns);
|
|
hrtimer_start(&out->vblank_hrtimer, out->period_ns, HRTIMER_MODE_REL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void vkms_disable_vblank(struct drm_crtc *crtc)
|
|
{
|
|
struct vkms_output *out = drm_crtc_to_vkms_output(crtc);
|
|
|
|
hrtimer_cancel(&out->vblank_hrtimer);
|
|
}
|
|
|
|
bool vkms_get_vblank_timestamp(struct drm_device *dev, unsigned int pipe,
|
|
int *max_error, ktime_t *vblank_time,
|
|
bool in_vblank_irq)
|
|
{
|
|
struct vkms_device *vkmsdev = drm_device_to_vkms_device(dev);
|
|
struct vkms_output *output = &vkmsdev->output;
|
|
|
|
*vblank_time = output->vblank_hrtimer.node.expires;
|
|
|
|
return true;
|
|
}
|
|
|
|
static const struct drm_crtc_funcs vkms_crtc_funcs = {
|
|
.set_config = drm_atomic_helper_set_config,
|
|
.destroy = drm_crtc_cleanup,
|
|
.page_flip = drm_atomic_helper_page_flip,
|
|
.reset = drm_atomic_helper_crtc_reset,
|
|
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
|
|
.atomic_destroy_state = drm_atomic_helper_crtc_destroy_state,
|
|
.enable_vblank = vkms_enable_vblank,
|
|
.disable_vblank = vkms_disable_vblank,
|
|
};
|
|
|
|
static void vkms_crtc_atomic_enable(struct drm_crtc *crtc,
|
|
struct drm_crtc_state *old_state)
|
|
{
|
|
drm_crtc_vblank_on(crtc);
|
|
}
|
|
|
|
static void vkms_crtc_atomic_disable(struct drm_crtc *crtc,
|
|
struct drm_crtc_state *old_state)
|
|
{
|
|
drm_crtc_vblank_off(crtc);
|
|
}
|
|
|
|
static void vkms_crtc_atomic_flush(struct drm_crtc *crtc,
|
|
struct drm_crtc_state *old_crtc_state)
|
|
{
|
|
unsigned long flags;
|
|
|
|
if (crtc->state->event) {
|
|
spin_lock_irqsave(&crtc->dev->event_lock, flags);
|
|
|
|
if (drm_crtc_vblank_get(crtc) != 0)
|
|
drm_crtc_send_vblank_event(crtc, crtc->state->event);
|
|
else
|
|
drm_crtc_arm_vblank_event(crtc, crtc->state->event);
|
|
|
|
spin_unlock_irqrestore(&crtc->dev->event_lock, flags);
|
|
|
|
crtc->state->event = NULL;
|
|
}
|
|
}
|
|
|
|
static const struct drm_crtc_helper_funcs vkms_crtc_helper_funcs = {
|
|
.atomic_flush = vkms_crtc_atomic_flush,
|
|
.atomic_enable = vkms_crtc_atomic_enable,
|
|
.atomic_disable = vkms_crtc_atomic_disable,
|
|
};
|
|
|
|
int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
|
|
struct drm_plane *primary, struct drm_plane *cursor)
|
|
{
|
|
int ret;
|
|
|
|
ret = drm_crtc_init_with_planes(dev, crtc, primary, cursor,
|
|
&vkms_crtc_funcs, NULL);
|
|
if (ret) {
|
|
DRM_ERROR("Failed to init CRTC\n");
|
|
return ret;
|
|
}
|
|
|
|
drm_crtc_helper_add(crtc, &vkms_crtc_helper_funcs);
|
|
|
|
return ret;
|
|
}
|