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output: add presentation refresh prediction

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This commit is contained in:
emersion 2018-10-02 12:11:09 +02:00
parent abd3e995ab
commit eac7c2ad2f
9 changed files with 47 additions and 23 deletions
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15
backend/drm/drm.c
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@ -1154,6 +1154,10 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
attempt_enable_needs_modeset(drm);
}
static int mhz_to_nsec(int mhz) {
return 1000000000000LL / mhz;
}
static void page_flip_handler(int fd, unsigned seq,
unsigned tv_sec, unsigned tv_usec, void *data) {
struct wlr_drm_connector *conn = data;
@ -1180,9 +1184,14 @@ static void page_flip_handler(int fd, unsigned seq,
.tv_sec = tv_sec,
.tv_nsec = tv_usec * 1000,
};
uint32_t present_flags = WLR_OUTPUT_PRESENT_VSYNC |
WLR_OUTPUT_PRESENT_HW_CLOCK | WLR_OUTPUT_PRESENT_HW_COMPLETION;
wlr_output_send_present(&conn->output, &present_time, seq, present_flags);
struct wlr_output_event_present present_event = {
.when = &present_time,
.seq = seq,
.refresh = mhz_to_nsec(conn->output.refresh),
.flags = WLR_OUTPUT_PRESENT_VSYNC | WLR_OUTPUT_PRESENT_HW_CLOCK |
WLR_OUTPUT_PRESENT_HW_COMPLETION,
};
wlr_output_send_present(&conn->output, &present_event);
if (drm->session->active) {
wlr_output_send_frame(&conn->output);