From d2acd4c36271ed87c7f8849a4f3c957fb36666fa Mon Sep 17 00:00:00 2001 From: Simon Ser Date: Wed, 14 Feb 2024 18:30:16 +0100 Subject: backend/drm: move restore logic to drm.c We'll need to use a bunch of internal functions from that file in the next commits. --- backend/drm/drm.c | 42 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 41 insertions(+), 1 deletion(-) (limited to 'backend/drm/drm.c') diff --git a/backend/drm/drm.c b/backend/drm/drm.c index 10485a8a..10564305 100644 --- a/backend/drm/drm.c +++ b/backend/drm/drm.c @@ -766,7 +766,7 @@ bool drm_connector_supports_vrr(struct wlr_drm_connector *conn) { return true; } -bool drm_connector_commit_state(struct wlr_drm_connector *conn, +static bool drm_connector_commit_state(struct wlr_drm_connector *conn, const struct wlr_output_state *base) { struct wlr_drm_backend *drm = conn->backend; @@ -1720,6 +1720,46 @@ void scan_drm_leases(struct wlr_drm_backend *drm) { drmFree(list); } +static void build_current_connector_state(struct wlr_output_state *state, + struct wlr_drm_connector *conn) { + bool enabled = conn->status != DRM_MODE_DISCONNECTED && conn->output.enabled; + + wlr_output_state_init(state); + wlr_output_state_set_enabled(state, enabled); + if (!enabled) { + return; + } + + if (conn->output.current_mode != NULL) { + wlr_output_state_set_mode(state, conn->output.current_mode); + } else { + wlr_output_state_set_custom_mode(state, + conn->output.width, conn->output.height, conn->output.refresh); + } +} + +void restore_drm_device(struct wlr_drm_backend *drm) { + // The previous DRM master leaves KMS in an undefined state. We need + // to restore out own state, but be careful to avoid invalid + // configurations. The connector/CRTC mapping may have changed, so + // first disable all CRTCs, then light up the ones we were using + // before the VT switch. + // TODO: better use the atomic API to improve restoration after a VT switch + if (!drm->iface->reset(drm)) { + wlr_log(WLR_ERROR, "Failed to reset state after VT switch"); + } + + struct wlr_drm_connector *conn; + wl_list_for_each(conn, &drm->connectors, link) { + struct wlr_output_state state; + build_current_connector_state(&state, conn); + if (!drm_connector_commit_state(conn, &state)) { + wlr_drm_conn_log(conn, WLR_ERROR, "Failed to restore state after VT switch"); + } + wlr_output_state_finish(&state); + } +} + static int mhz_to_nsec(int mhz) { return 1000000000000LL / mhz; } -- cgit v1.2.3