Implement support for framebuffers that don't start on a page boundary.

This happens on the new 14" and 16" Macbook Pro where we deliberately use
a framebuffer that skips the first few lines to avoid "the notch".
The offset of the first pixel is added to struct wsdisplay_fbinfo.  The
stride is added as well, mirroring the value returned by the
WSDISPLAYIO_LINEBYTES ioctl, such that we can retire that one in the
future.  A compat ioctl is implemented to help the transition.  The compat
code will be removed after OpenBSD 7.3 has been released.

ok miod@

1 files changed, 20 insertions, 1 deletions

diff --git a/sys/dev/wscons/wsdisplay.c b/sys/dev/wscons/wsdisplay.c
index b86602e2895..cc6f1008497 100644
--- a/sys/dev/wscons/wsdisplay.c
+++ b/sys/dev/wscons/wsdisplay.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: wsdisplay.c,v 1.148 2022/07/08 21:29:20 miod Exp $ */
+/* $OpenBSD: wsdisplay.c,v 1.149 2022/07/15 17:57:27 kettenis Exp $ */
 /* $NetBSD: wsdisplay.c,v 1.82 2005/02/27 00:27:52 perry Exp $ */
 
 /*
@@ -1302,6 +1302,25 @@ wsdisplay_driver_ioctl(struct wsdisplay_softc *sc, u_long cmd, caddr_t data,
 {
 	int error;
 
+#if defined(OpenBSD7_1) || defined(OpenBSD7_2) || defined(OpenBSD7_3)
+	if (cmd == WSDISPLAYIO_OGINFO) {
+		struct wsdisplay_ofbinfo *oinfo =
+			(struct wsdisplay_ofbinfo *)data;
+		struct wsdisplay_fbinfo info;
+
+		error = (*sc->sc_accessops->ioctl)(sc->sc_accesscookie,
+		    WSDISPLAYIO_GINFO, (caddr_t)&info, flag, p);
+		if (error)
+			return error;
+
+		oinfo->height = info.height;
+		oinfo->width = info.width;
+		oinfo->depth = info.depth;
+		oinfo->cmsize = info.cmsize;
+		return (0);
+	}
+#endif
+
 	error = ((*sc->sc_accessops->ioctl)(sc->sc_accesscookie, cmd, data,
 	    flag, p));
 	/* Do not report parameters with empty ranges to userland. */