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drm: do not modeset to current mode

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There is no point in modesetting an output to a mode that it is already
set to. Modesetting will cause the output to briefly flicker which is
undesirable for a noop. This returns early in `drm_connector_set_mode`
when attempting to modeset to the current mode.
This commit is contained in:
Brian Ashworth 2019-02-14 00:27:43 -05:00 • committed by emersion
parent 5c8d2da0a1
commit 72c76b128e
1 changed files with 4 additions and 0 deletions
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4
backend/drm/drm.c
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@ -537,6 +537,10 @@ static bool drm_connector_set_mode(struct wlr_output *output,
conn->desired_mode = mode; conn->desired_mode = mode;
return false; return false;
} }
if (conn->output.current_mode == mode) {
// Nothing to do
return true;
}
wlr_log(WLR_INFO, "Modesetting '%s' with '%ux%u@%u mHz'", wlr_log(WLR_INFO, "Modesetting '%s' with '%ux%u@%u mHz'",
conn->output.name, mode->width, mode->height, mode->refresh); conn->output.name, mode->width, mode->height, mode->refresh);