/* * Copyright 2006 Luc Verhaegen. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sub license, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the * next paragraph) shall be included in all copies or substantial portions * of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. */ #ifdef HAVE_XORG_CONFIG_H #include <xorg-config.h> #endif #include "xf86.h" #include "xf86DDC.h" #include <X11/Xatom.h> #include "property.h" #include "propertyst.h" #include "xf86DDC.h" #include <string.h> #define EDID1_ATOM_NAME "XFree86_DDC_EDID1_RAWDATA" #define EDID2_ATOM_NAME "XFree86_DDC_EDID2_RAWDATA" static void edidMakeAtom(int i, const char *name, CARD8 *data, int size) { Atom atom; unsigned char *atom_data; if (!(atom_data = xalloc(size*sizeof(CARD8)))) return; atom = MakeAtom(name, strlen(name), TRUE); memcpy(atom_data, data, size); xf86RegisterRootWindowProperty(i, atom, XA_INTEGER, 8, size, atom_data); } static void addRootWindowProperties(ScrnInfoPtr pScrn, xf86MonPtr DDC) { int i, scrnIndex = pScrn->scrnIndex; Bool makeEDID1prop = FALSE; Bool makeEDID2prop = FALSE; if (DDC->flags & MONITOR_DISPLAYID) { /* Don't bother, use RANDR already */ return; } else if (DDC->ver.version == 1) { makeEDID1prop = TRUE; } else if (DDC->ver.version == 2) { int checksum1; int checksum2; makeEDID2prop = TRUE; /* Some monitors (eg Panasonic PanaSync4) * report version==2 because they used EDID v2 spec document, * although they use EDID v1 data structure :-( * * Try using checksum to determine when we have such a monitor. */ checksum2 = 0; for (i = 0; i < 256; i++) checksum2 += DDC->rawData[i]; if (checksum2 % 256) { xf86DrvMsg(scrnIndex, X_INFO, "Monitor EDID v2 checksum failed\n"); xf86DrvMsg(scrnIndex, X_INFO, "XFree86_DDC_EDID2_RAWDATA property may be bad\n"); checksum1 = 0; for (i = 0; i < 128; i++) checksum1 += DDC->rawData[i]; if (!(checksum1 % 256)) { xf86DrvMsg(scrnIndex, X_INFO, "Monitor EDID v1 checksum passed,\n"); xf86DrvMsg(scrnIndex, X_INFO, "XFree86_DDC_EDID1_RAWDATA property created\n"); makeEDID1prop = TRUE; } } } else { xf86DrvMsg(scrnIndex, X_PROBED, "unexpected EDID version %d.%d\n", DDC->ver.version, DDC->ver.revision); return; } if (makeEDID1prop) { int size = 128 + (DDC->flags & EDID_COMPLETE_RAWDATA ? DDC->no_sections * 128 : 0); edidMakeAtom(scrnIndex, EDID1_ATOM_NAME, DDC->rawData, size); } if (makeEDID2prop) edidMakeAtom(scrnIndex, EDID2_ATOM_NAME, DDC->rawData, 256); } Bool xf86SetDDCproperties(ScrnInfoPtr pScrn, xf86MonPtr DDC) { if (!pScrn || !pScrn->monitor || !DDC) return FALSE; if (DDC->flags & MONITOR_DISPLAYID) ; else xf86EdidMonitorSet(pScrn->scrnIndex, pScrn->monitor, DDC); addRootWindowProperties(pScrn, DDC); return TRUE; }