diff options
Diffstat (limited to 'backend/drm/drm.c')
| -rw-r--r-- | backend/drm/drm.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/backend/drm/drm.c b/backend/drm/drm.c index 7cbd3e4a..fb49d46c 100644 --- a/backend/drm/drm.c +++ b/backend/drm/drm.c @@ -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); } |