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/*
* Copyright © 2014 Intel Corporation
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#ifdef HAVE_DIX_CONFIG_H
#include "dix-config.h"
#endif
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <poll.h>
#include <unistd.h>
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <time.h>
#include <xf86.h>
#include <xf86Crtc.h>
#include <xf86drm.h>
#include <xf86str.h>
#include <present.h>
#include "driver.h"
#if 0
#define DebugPresent(x) ErrorF x
#else
#define DebugPresent(x)
#endif
struct ms_present_vblank_event {
uint64_t event_id;
};
static RRCrtcPtr
ms_present_get_crtc(WindowPtr window)
{
xf86CrtcPtr xf86_crtc = ms_dri2_crtc_covering_drawable(&window->drawable);
return xf86_crtc ? xf86_crtc->randr_crtc : NULL;
}
static int
ms_present_get_ust_msc(RRCrtcPtr crtc, CARD64 *ust, CARD64 *msc)
{
xf86CrtcPtr xf86_crtc = crtc->devPrivate;
return ms_get_crtc_ust_msc(xf86_crtc, ust, msc);
}
/*
* Flush the DRM event queue when full; makes space for new events.
*/
static Bool
ms_flush_drm_events(ScreenPtr screen)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
struct pollfd p = { .fd = ms->fd, .events = POLLIN };
int r;
do {
r = poll(&p, 1, 0);
} while (r == -1 && (errno == EINTR || errno == EAGAIN));
if (r <= 0)
return TRUE;
return drmHandleEvent(ms->fd, &ms->event_context) >= 0;
}
/*
* Called when the queued vblank event has occurred
*/
static void
ms_present_vblank_handler(uint64_t msc, uint64_t usec, void *data)
{
struct ms_present_vblank_event *event = data;
DebugPresent(("\t\tmh %lld msc %llu\n",
(long long) event->event_id, (long long) msc));
present_event_notify(event->event_id, usec, msc);
free(event);
}
/*
* Called when the queued vblank is aborted
*/
static void
ms_present_vblank_abort(void *data)
{
struct ms_present_vblank_event *event = data;
DebugPresent(("\t\tma %lld\n", (long long) event->event_id));
free(event);
}
/*
* Queue an event to report back to the Present extension when the specified
* MSC has past
*/
static int
ms_present_queue_vblank(RRCrtcPtr crtc,
uint64_t event_id,
uint64_t msc)
{
xf86CrtcPtr xf86_crtc = crtc->devPrivate;
ScreenPtr screen = crtc->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
drmmode_crtc_private_ptr drmmode_crtc = xf86_crtc->driver_private;
struct ms_present_vblank_event *event;
drmVBlank vbl;
int ret;
uint32_t seq;
event = calloc(sizeof(struct ms_present_vblank_event), 1);
if (!event)
return BadAlloc;
event->event_id = event_id;
seq = ms_drm_queue_alloc(xf86_crtc, event,
ms_present_vblank_handler,
ms_present_vblank_abort);
if (!seq) {
free(event);
return BadAlloc;
}
vbl.request.type =
DRM_VBLANK_ABSOLUTE | DRM_VBLANK_EVENT | drmmode_crtc->vblank_pipe;
vbl.request.sequence = ms_crtc_msc_to_kernel_msc(xf86_crtc, msc);
vbl.request.signal = seq;
for (;;) {
ret = drmWaitVBlank(ms->fd, &vbl);
if (!ret)
break;
if (errno != EBUSY || !ms_flush_drm_events(screen))
return BadAlloc;
}
DebugPresent(("\t\tmq %lld seq %u msc %llu (hw msc %u)\n",
(long long) event_id, seq, (long long) msc,
vbl.request.sequence));
return Success;
}
static Bool
ms_present_event_match(void *data, void *match_data)
{
struct ms_present_vblank_event *event = data;
uint64_t *match = match_data;
return *match == event->event_id;
}
/*
* Remove a pending vblank event from the DRM queue so that it is not reported
* to the extension
*/
static void
ms_present_abort_vblank(RRCrtcPtr crtc, uint64_t event_id, uint64_t msc)
{
ScreenPtr screen = crtc->pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
ms_drm_abort(scrn, ms_present_event_match, &event_id);
}
/*
* Flush our batch buffer when requested by the Present extension.
*/
static void
ms_present_flush(WindowPtr window)
{
#ifdef GLAMOR
ScreenPtr screen = window->drawable.pScreen;
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
modesettingPtr ms = modesettingPTR(scrn);
if (ms->drmmode.glamor)
glamor_block_handler(screen);
#endif
}
static present_screen_info_rec ms_present_screen_info = {
.version = PRESENT_SCREEN_INFO_VERSION,
.get_crtc = ms_present_get_crtc,
.get_ust_msc = ms_present_get_ust_msc,
.queue_vblank = ms_present_queue_vblank,
.abort_vblank = ms_present_abort_vblank,
.flush = ms_present_flush,
.capabilities = PresentCapabilityNone,
.check_flip = 0,
.flip = 0,
.unflip = 0,
};
Bool
ms_present_screen_init(ScreenPtr screen)
{
return present_screen_init(screen, &ms_present_screen_info);
}
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