1 /* $NetBSD: wsdisplay_util.c,v 1.3 2020/06/11 02:39:31 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 Michael Lorenz 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* some utility functions for use with wsdisplay */ 30 31 #include <sys/param.h> 32 #include <sys/stdint.h> 33 #include <sys/systm.h> 34 #include <sys/buf.h> 35 #include <sys/device.h> 36 #include <dev/cons.h> 37 38 #include <dev/wscons/wsdisplayvar.h> 39 #include <dev/rasops/rasops.h> 40 #include <dev/wscons/wsconsio.h> 41 42 int 43 wsdisplayio_get_edid(device_t dev, struct wsdisplayio_edid_info *d) 44 { 45 prop_data_t edid_data; 46 int edid_size; 47 48 edid_data = prop_dictionary_get(device_properties(dev), "EDID"); 49 if (edid_data != NULL) { 50 edid_size = prop_data_size(edid_data); 51 /* less than 128 bytes is bogus */ 52 if (edid_size < 128) 53 return ENODEV; 54 d->data_size = edid_size; 55 if (d->buffer_size < edid_size) 56 return EAGAIN; 57 return copyout(prop_data_value(edid_data), 58 d->edid_data, edid_size); 59 } 60 return ENODEV; 61 } 62 63 /* convenience function to fill in stuff from rasops_info */ 64 int 65 wsdisplayio_get_fbinfo(struct rasops_info *ri, struct wsdisplayio_fbinfo *fbi) 66 { 67 fbi->fbi_width = ri->ri_width; 68 fbi->fbi_height = ri->ri_height; 69 fbi->fbi_stride = ri->ri_stride; 70 fbi->fbi_bitsperpixel = ri->ri_depth; 71 if (ri->ri_depth > 8) { 72 fbi->fbi_pixeltype = WSFB_RGB; 73 fbi->fbi_subtype.fbi_rgbmasks.red_offset = ri->ri_rpos; 74 fbi->fbi_subtype.fbi_rgbmasks.red_size = ri->ri_rnum; 75 fbi->fbi_subtype.fbi_rgbmasks.green_offset = ri->ri_gpos; 76 fbi->fbi_subtype.fbi_rgbmasks.green_size = ri->ri_gnum; 77 fbi->fbi_subtype.fbi_rgbmasks.blue_offset = ri->ri_bpos; 78 fbi->fbi_subtype.fbi_rgbmasks.blue_size = ri->ri_bnum; 79 fbi->fbi_subtype.fbi_rgbmasks.alpha_offset = 0; 80 fbi->fbi_subtype.fbi_rgbmasks.alpha_size = 0; 81 } else { 82 fbi->fbi_pixeltype = WSFB_CI; 83 fbi->fbi_subtype.fbi_cmapinfo.cmap_entries = 1 << ri->ri_depth; 84 } 85 fbi->fbi_flags = 0; 86 fbi->fbi_fbsize = ri->ri_stride * ri->ri_height; 87 fbi->fbi_fboffset = 0; 88 return 0; 89 } 90