diff options
Diffstat (limited to 'xorg-server/hw/xfree86/drivers/modesetting/present.c')
| -rw-r--r-- | xorg-server/hw/xfree86/drivers/modesetting/present.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/drivers/modesetting/present.c b/xorg-server/hw/xfree86/drivers/modesetting/present.c new file mode 100644 index 000000000..359e11316 --- /dev/null +++ b/xorg-server/hw/xfree86/drivers/modesetting/present.c @@ -0,0 +1,228 @@ +/* + * 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); +} |