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More accurate refresh rates (mHz)

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This commit is contained in:
Scott Anderson 2017-05-13 22:27:25 +12:00
parent c436e76240
commit 3000b8615f
2 changed files with 19 additions and 7 deletions
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22
backend/drm/drm.c
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@ -249,6 +249,20 @@ static struct wlr_output_impl output_impl = {
.destroy = wlr_drm_output_destroy,
};
static uint32_t calculate_refresh_rate(drmModeModeInfo *mode) {
uint32_t refresh = (mode->clock * 1000000LL / mode->htotal +
mode->vtotal / 2) / mode->vtotal;
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
refresh *= 2;
if (mode->flags & DRM_MODE_FLAG_DBLSCAN)
refresh /= 2;
if (mode->vscan > 1)
refresh /= mode->vscan;
return refresh;
}
void wlr_drm_scan_connectors(struct wlr_backend_state *state) {
wlr_log(L_INFO, "Scanning DRM connectors");
@ -321,14 +335,12 @@ void wlr_drm_scan_connectors(struct wlr_backend_state *state) {
struct wlr_output_mode *mode = calloc(1,
sizeof(struct wlr_output_mode));
mode->width = _state->mode.hdisplay;
// TODO: Calculate more accurate refresh rate
// TODO: Check that this refresh rate is mHz
mode->height = _state->mode.vdisplay;
mode->refresh = calculate_refresh_rate(&_state->mode);
mode->state = _state;
wlr_log(L_INFO, " %"PRIu16"@%"PRIu16"@%"PRIu32,
_state->mode.hdisplay, _state->mode.vdisplay,
_state->mode.vrefresh);
wlr_log(L_INFO, " %"PRIu32"@%"PRIu32"@%"PRIu32,
mode->width, mode->height, mode->refresh);
list_add(wlr_output->modes, mode);
}

4
include/wlr/wayland.h
View file

@ -10,8 +10,8 @@ struct wlr_output_mode_state;
struct wlr_output_mode {
struct wlr_output_mode_state *state;
uint32_t flags; // enum wl_output_mode
int32_t width, height;
int32_t refresh; // mHz
uint32_t width, height;
uint32_t refresh; // mHz
};
struct wlr_output_impl;