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Diffstat (limited to '')
-rw-r--r-- | src/VBox/Additions/x11/vboxvideo/edid.c | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/src/VBox/Additions/x11/vboxvideo/edid.c b/src/VBox/Additions/x11/vboxvideo/edid.c new file mode 100644 index 00000000..96432848 --- /dev/null +++ b/src/VBox/Additions/x11/vboxvideo/edid.c @@ -0,0 +1,165 @@ +/* $Id: edid.c $ */ +/** @file + * + * Linux Additions X11 graphics driver, EDID construction + */ + +/* + * Copyright (C) 2006-2023 Oracle and/or its affiliates. + * This file is based on drmmode_display.c from the X.Org xf86-video-intel + * driver with the following copyright notice: + * + * Copyright © 2007 Red Hat, Inc. + * + * 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, sublicense, + * 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 NONINFRINGEMENT. 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. + * + * Authors: + * Dave Airlie <airlied@redhat.com> + * Michael Thayer <michael.thayer@oracle.com> + */ + +#include "misc.h" +#include "xf86DDC.h" +#include "xf86Crtc.h" +#include "vboxvideo.h" + +enum { EDID_SIZE = 128 }; + +const unsigned char g_acszEDIDBase[EDID_SIZE] = +{ + 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, /* header */ + 0x58, 0x58, /* manufacturer (VBX) */ + 0x00, 0x00, /* product code */ + 0x00, 0x00,0x00, 0x00, /* serial number goes here */ + 0x01, /* week of manufacture */ + 0x00, /* year of manufacture */ + 0x01, 0x03, /* EDID version */ + 0x80, /* capabilities - digital */ + 0x00, /* horiz. res in cm, zero for projectors */ + 0x00, /* vert. res in cm */ + 0x78, /* display gamma (120 == 2.2). Should we ask the host for this? */ + 0xEE, /* features (standby, suspend, off, RGB, standard colour space, + * preferred timing mode) */ + 0xEE, 0x91, 0xA3, 0x54, 0x4C, 0x99, 0x26, 0x0F, 0x50, 0x54, + /* chromaticity for standard colour space - should we ask the host? */ + 0x00, 0x00, 0x00, /* no default timings */ + 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, + 0x01, 0x01, 0x01, 0x01, /* no standard timings */ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* descriptor block 1 goes here */ + 0x00, 0x00, 0x00, 0xFD, 0x00, /* descriptor block 2, monitor ranges */ + 0x00, 0xC8, 0x00, 0xC8, 0x64, 0x00, 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, /* 0-200Hz vertical, 0-200KHz horizontal, 1000MHz pixel clock */ + 0x00, 0x00, 0x00, 0xFC, 0x00, /* descriptor block 3, monitor name */ + 'V', 'B', 'O', 'X', ' ', 'm', 'o', 'n', 'i', 't', 'o', 'r', '\n', + 0x00, 0x00, 0x00, 0x10, 0x00, /* descriptor block 4: dummy data */ + 0x0A, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, + 0x20, + 0x00, /* number of extensions */ + 0x00 /* checksum goes here */ +}; + +static void fillDescBlockTimings(unsigned char *pchDescBlock, + DisplayModePtr mode) +{ + struct detailed_timings timing; + + timing.clock = mode->Clock * 1000; + timing.h_active = mode->HDisplay; + timing.h_blanking = mode->HTotal - mode->HDisplay; + timing.v_active = mode->VDisplay; + timing.v_blanking = mode->VTotal - mode->VDisplay; + timing.h_sync_off = mode->HSyncStart - mode->HDisplay; + timing.h_sync_width = mode->HSyncEnd - mode->HSyncStart; + timing.v_sync_off = mode->VSyncStart - mode->VDisplay; + timing.v_sync_width = mode->VSyncEnd - mode->VSyncStart; + pchDescBlock[0] = (timing.clock / 10000) & 0xff; + pchDescBlock[1] = (timing.clock / 10000) >> 8; + pchDescBlock[2] = timing.h_active & 0xff; + pchDescBlock[3] = timing.h_blanking & 0xff; + pchDescBlock[4] = (timing.h_active >> 4) & 0xf0; + pchDescBlock[4] |= (timing.h_blanking >> 8) & 0xf; + pchDescBlock[5] = timing.v_active & 0xff; + pchDescBlock[6] = timing.v_blanking & 0xff; + pchDescBlock[7] = (timing.v_active >> 4) & 0xf0; + pchDescBlock[7] |= (timing.v_blanking >> 8) & 0xf; + pchDescBlock[8] = timing.h_sync_off & 0xff; + pchDescBlock[9] = timing.h_sync_width & 0xff; + pchDescBlock[10] = (timing.v_sync_off << 4) & 0xf0; + pchDescBlock[10] |= timing.v_sync_width & 0xf; + pchDescBlock[11] = (timing.h_sync_off >> 2) & 0xC0; + pchDescBlock[11] |= (timing.h_sync_width >> 4) & 0x30; + pchDescBlock[11] |= (timing.v_sync_off >> 2) & 0xC; + pchDescBlock[11] |= (timing.v_sync_width >> 4) & 0x3; + pchDescBlock[12] = pchDescBlock[13] = pchDescBlock[14] + = pchDescBlock[15] = pchDescBlock[16] + = pchDescBlock[17] = 0; +} + + +static void setEDIDChecksum(unsigned char *pch) +{ + unsigned i, sum = 0; + for (i = 0; i < EDID_SIZE - 1; ++i) + sum += pch[i]; + pch[EDID_SIZE - 1] = (0x100 - (sum & 0xFF)) & 0xFF; +} + + +/** + * Construct an EDID for an output given a preferred mode. The main reason for + * doing this is to confound gnome-settings-deamon which tries to reset the + * last mode configuration if the same monitors are plugged in again, which is + * a reasonable thing to do but not what we want in a VM. We evily store + * the (empty) raw EDID data at the end of the structure so that it gets + * freed automatically along with the structure. + */ +Bool VBOXEDIDSet(xf86OutputPtr output, DisplayModePtr pmode) +{ + unsigned char *pch, *pchEDID; + xf86MonPtr pEDIDMon; + + pch = calloc(1, sizeof(xf86Monitor) + EDID_SIZE); + if (!pch) + { + xf86DrvMsg(output->scrn->scrnIndex, X_ERROR, + "Can't allocate memory for EDID structure.\n"); + return FALSE; + } + pchEDID = pch + sizeof(xf86Monitor); + memcpy(pchEDID, g_acszEDIDBase, EDID_SIZE); + pchEDID[12] = pmode->HDisplay & 0xff; + pchEDID[13] = pmode->HDisplay >> 8; + pchEDID[14] = pmode->VDisplay & 0xff; + pchEDID[15] = pmode->VDisplay >> 8; + fillDescBlockTimings(pchEDID + 54, pmode); + setEDIDChecksum(pchEDID); + pEDIDMon = xf86InterpretEDID(output->scrn->scrnIndex, pchEDID); + if (!pEDIDMon) + { + free(pch); + return FALSE; + } + memcpy(pch, pEDIDMon, sizeof(xf86Monitor)); + free(pEDIDMon); + pEDIDMon = (xf86MonPtr)pch; + xf86OutputSetEDID(output, pEDIDMon); + return TRUE; +} |