/* * Copyright © 2006 Intel Corporation * * 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: * Eric Anholt * */ #ifdef HAVE_CONFIG_H #include "config.h" #undef VERSION /* XXX edid.h has a VERSION too */ #endif #include #include #include #define _PARSE_EDID_ #include "xf86.h" #include "i830.h" #include "i830_bios.h" #include "edid.h" #define INTEL_BIOS_8(_addr) (bios[_addr]) #define INTEL_BIOS_16(_addr) (bios[_addr] | \ (bios[_addr + 1] << 8)) #define INTEL_BIOS_32(_addr) (bios[_addr] | \ (bios[_addr + 1] << 8) \ (bios[_addr + 2] << 16) \ (bios[_addr + 3] << 24)) static void * find_section(struct bdb_header *bdb, int section_id) { unsigned char *base = (unsigned char *)bdb; int index = 0; uint16_t total, current_size; unsigned char current_id; /* skip to first section */ index += bdb->header_size; total = bdb->bdb_size; /* walk the sections looking for section_id */ while (index < total) { current_id = *(base + index); index++; current_size = *((uint16_t *)(base + index)); index += 2; if (current_id == section_id) return base + index; index += current_size; } return NULL; } /** * Returns the BIOS's fixed panel mode. * * Note that many BIOSes will have the appropriate tables for a panel even when * a panel is not attached. Additionally, many BIOSes adjust table sizes or * offsets, such that this parsing fails. Thus, almost any other method for * detecting the panel mode is preferable. */ static void parse_panel_data(I830Ptr pI830, struct bdb_header *bdb) { struct bdb_lvds_options *lvds_options; struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs; int timing_offset; DisplayModePtr fixed_mode; unsigned char *timing_ptr; /* Defaults if we can't find VBT info */ pI830->lvds_dither = 0; lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); if (!lvds_options) return; pI830->lvds_dither = lvds_options->pixel_dither; if (lvds_options->panel_type == 0xff) return; lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS); if (!lvds_lfp_data_ptrs) return; timing_offset = lvds_lfp_data_ptrs->ptr[lvds_options->panel_type].dvo_timing_offset; timing_ptr = (unsigned char *)bdb + timing_offset; if (pI830->skip_panel_detect) return; fixed_mode = xnfalloc(sizeof(DisplayModeRec)); memset(fixed_mode, 0, sizeof(*fixed_mode)); /* Since lvds_bdb_2_fp_edid_dtd is just an EDID detailed timing * block, pull the contents out using EDID macros. */ fixed_mode->HDisplay = _H_ACTIVE(timing_ptr); fixed_mode->VDisplay = _V_ACTIVE(timing_ptr); fixed_mode->HSyncStart = fixed_mode->HDisplay + _H_SYNC_OFF(timing_ptr); fixed_mode->HSyncEnd = fixed_mode->HSyncStart + _H_SYNC_WIDTH(timing_ptr); fixed_mode->HTotal = fixed_mode->HDisplay + _H_BLANK(timing_ptr); fixed_mode->VSyncStart = fixed_mode->VDisplay + _V_SYNC_OFF(timing_ptr); fixed_mode->VSyncEnd = fixed_mode->VSyncStart + _V_SYNC_WIDTH(timing_ptr); fixed_mode->VTotal = fixed_mode->VDisplay + _V_BLANK(timing_ptr); fixed_mode->Clock = _PIXEL_CLOCK(timing_ptr) / 1000; fixed_mode->type = M_T_PREFERRED; xf86SetModeDefaultName(fixed_mode); pI830->lvds_fixed_mode = fixed_mode; } static void parse_general_features(I830Ptr pI830, struct bdb_header *bdb) { struct bdb_general_features *general; /* Set sensible defaults in case we can't find the general block */ pI830->tv_present = 1; general = find_section(bdb, BDB_GENERAL_FEATURES); if (!general) return; pI830->tv_present = general->int_tv_support; pI830->lvds_use_ssc = general->enable_ssc; if (pI830->lvds_use_ssc) { if (IS_I855(pI830)) pI830->lvds_ssc_freq = general->ssc_freq ? 66 : 48; else pI830->lvds_ssc_freq = general->ssc_freq ? 100 : 96; } } #define INTEL_VBIOS_SIZE (64 * 1024) /* XXX */ /** * i830_bios_init - map VBIOS, find VBT * * VBT existence is a sanity check that is relied on by other i830_bios.c code. * Note that it would be better to use a BIOS call to get the VBT, as BIOSes may * feed an updated VBT back through that, compared to what we'll fetch using * this method of groping around in the BIOS data. * * Returns 0 on success, nonzero on failure. */ int i830_bios_init(ScrnInfoPtr pScrn) { I830Ptr pI830 = I830PTR(pScrn); struct vbt_header *vbt; struct bdb_header *bdb; int vbt_off, bdb_off; unsigned char *bios; int ret; int size; #if XSERVER_LIBPCIACCESS size = pI830->PciInfo->rom_size; if (size == 0) { size = INTEL_VBIOS_SIZE; xf86DrvMsg(pScrn->scrnIndex, X_WARNING, "libpciaccess reported 0 rom size, guessing %dkB\n", size / 1024); } #else size = INTEL_VBIOS_SIZE; #endif bios = xalloc(size); if (bios == NULL) return -1; #if XSERVER_LIBPCIACCESS ret = pci_device_read_rom (pI830->PciInfo, bios); if (ret != 0) { xf86DrvMsg(pScrn->scrnIndex, X_WARNING, "libpciaccess failed to read %dkB video BIOS: %s\n", size / 1024, strerror(-ret)); xfree (bios); return -1; } #else /* xf86ReadPciBIOS returns the length read */ ret = xf86ReadPciBIOS(0, pI830->PciTag, 0, bios, size); if (ret <= 0) { xfree (bios); return -1; } #endif vbt_off = INTEL_BIOS_16(0x1a); if (vbt_off >= size) { xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Bad VBT offset: 0x%x\n", vbt_off); xfree(bios); return -1; } vbt = (struct vbt_header *)(bios + vbt_off); if (memcmp(vbt->signature, "$VBT", 4) != 0) { xf86DrvMsg(pScrn->scrnIndex, X_ERROR, "Bad VBT signature\n"); xfree(bios); return -1; } /* Now that we've found the VBIOS, go scour the VBTs */ bdb_off = vbt_off + vbt->bdb_offset; bdb = (struct bdb_header *)(bios + bdb_off); parse_general_features(pI830, bdb); parse_panel_data(pI830, bdb); xfree(bios); return 0; }