/* * 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 * */ #include "drmP.h" #include "drm.h" #include "i915_drm.h" #include "i915_drv.h" #include "intel_bios.h" #define SLAVE_ADDR1 0x70 #define SLAVE_ADDR2 0x72 static int panel_type; static void * find_section(struct bdb_header *bdb, int section_id) { u8 *base = (u8 *)bdb; int index = 0; u16 total, current_size; u8 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 = *((u16 *)(base + index)); index += 2; if (current_id == section_id) return base + index; index += current_size; } return NULL; } static u16 get_blocksize(void *p) { u16 *block_ptr, block_size; block_ptr = (u16 *)((char *)p - 2); block_size = *block_ptr; return block_size; } static void fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode, struct lvds_dvo_timing *dvo_timing) { panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) | dvo_timing->hactive_lo; panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay + ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo); panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start + dvo_timing->hsync_pulse_width; panel_fixed_mode->htotal = panel_fixed_mode->hdisplay + ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo); panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) | dvo_timing->vactive_lo; panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay + dvo_timing->vsync_off; panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start + dvo_timing->vsync_pulse_width; panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay + ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo); panel_fixed_mode->clock = dvo_timing->clock * 10; panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED; if (dvo_timing->hsync_positive) panel_fixed_mode->flags |= DRM_MODE_FLAG_PHSYNC; else panel_fixed_mode->flags |= DRM_MODE_FLAG_NHSYNC; if (dvo_timing->vsync_positive) panel_fixed_mode->flags |= DRM_MODE_FLAG_PVSYNC; else panel_fixed_mode->flags |= DRM_MODE_FLAG_NVSYNC; /* Some VBTs have bogus h/vtotal values */ if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal) panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1; if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal) panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1; drm_mode_set_name(panel_fixed_mode); } /* Try to find integrated panel data */ static void parse_lfp_panel_data(struct drm_i915_private *dev_priv, struct bdb_header *bdb) { struct bdb_lvds_options *lvds_options; struct bdb_lvds_lfp_data *lvds_lfp_data; struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs; struct bdb_lvds_lfp_data_entry *entry; struct lvds_dvo_timing *dvo_timing; struct drm_display_mode *panel_fixed_mode; int lfp_data_size, dvo_timing_offset; int i, temp_downclock; struct drm_display_mode *temp_mode; /* Defaults if we can't find VBT info */ dev_priv->lvds_dither = 0; dev_priv->lvds_vbt = 0; lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); if (!lvds_options) return; dev_priv->lvds_dither = lvds_options->pixel_dither; if (lvds_options->panel_type == 0xff) return; panel_type = lvds_options->panel_type; lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA); if (!lvds_lfp_data) return; lvds_lfp_data_ptrs = find_section(bdb, BDB_LVDS_LFP_DATA_PTRS); if (!lvds_lfp_data_ptrs) return; dev_priv->lvds_vbt = 1; lfp_data_size = lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset - lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset; entry = (struct bdb_lvds_lfp_data_entry *) ((uint8_t *)lvds_lfp_data->data + (lfp_data_size * lvds_options->panel_type)); dvo_timing_offset = lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset - lvds_lfp_data_ptrs->ptr[0].fp_timing_offset; /* * the size of fp_timing varies on the different platform. * So calculate the DVO timing relative offset in LVDS data * entry to get the DVO timing entry */ dvo_timing = (struct lvds_dvo_timing *) ((unsigned char *)entry + dvo_timing_offset); panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); fill_detail_timing_data(panel_fixed_mode, dvo_timing); dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode; DRM_DEBUG_KMS("Found panel mode in BIOS VBT tables:\n"); drm_mode_debug_printmodeline(panel_fixed_mode); temp_mode = kzalloc(sizeof(*temp_mode), GFP_KERNEL); temp_downclock = panel_fixed_mode->clock; /* * enumerate the LVDS panel timing info entry in VBT to check whether * the LVDS downclock is found. */ for (i = 0; i < 16; i++) { entry = (struct bdb_lvds_lfp_data_entry *) ((uint8_t *)lvds_lfp_data->data + (lfp_data_size * i)); dvo_timing = (struct lvds_dvo_timing *) ((unsigned char *)entry + dvo_timing_offset); fill_detail_timing_data(temp_mode, dvo_timing); if (temp_mode->hdisplay == panel_fixed_mode->hdisplay && temp_mode->hsync_start == panel_fixed_mode->hsync_start && temp_mode->hsync_end == panel_fixed_mode->hsync_end && temp_mode->htotal == panel_fixed_mode->htotal && temp_mode->vdisplay == panel_fixed_mode->vdisplay && temp_mode->vsync_start == panel_fixed_mode->vsync_start && temp_mode->vsync_end == panel_fixed_mode->vsync_end && temp_mode->vtotal == panel_fixed_mode->vtotal && temp_mode->clock < temp_downclock) { /* * downclock is already found. But we expect * to find the lower downclock. */ temp_downclock = temp_mode->clock; } /* clear it to zero */ memset(temp_mode, 0, sizeof(*temp_mode)); } kfree(temp_mode); if (temp_downclock < panel_fixed_mode->clock && i915_lvds_downclock) { dev_priv->lvds_downclock_avail = 1; dev_priv->lvds_downclock = temp_downclock; DRM_DEBUG_KMS("LVDS downclock is found in VBT. ", "Normal Clock %dKHz, downclock %dKHz\n", temp_downclock, panel_fixed_mode->clock); } return; } /* Try to find sdvo panel data */ static void parse_sdvo_panel_data(struct drm_i915_private *dev_priv, struct bdb_header *bdb) { struct bdb_sdvo_lvds_options *sdvo_lvds_options; struct lvds_dvo_timing *dvo_timing; struct drm_display_mode *panel_fixed_mode; dev_priv->sdvo_lvds_vbt_mode = NULL; sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); if (!sdvo_lvds_options) return; dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS); if (!dvo_timing) return; panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); if (!panel_fixed_mode) return; fill_detail_timing_data(panel_fixed_mode, dvo_timing + sdvo_lvds_options->panel_type); dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode; return; } static void parse_general_features(struct drm_i915_private *dev_priv, struct bdb_header *bdb) { struct drm_device *dev = dev_priv->dev; struct bdb_general_features *general; /* Set sensible defaults in case we can't find the general block */ dev_priv->int_tv_support = 1; dev_priv->int_crt_support = 1; general = find_section(bdb, BDB_GENERAL_FEATURES); if (general) { dev_priv->int_tv_support = general->int_tv_support; dev_priv->int_crt_support = general->int_crt_support; dev_priv->lvds_use_ssc = general->enable_ssc; if (dev_priv->lvds_use_ssc) { if (IS_I85X(dev_priv->dev)) dev_priv->lvds_ssc_freq = general->ssc_freq ? 66 : 48; else if (IS_IRONLAKE(dev_priv->dev) || IS_GEN6(dev)) dev_priv->lvds_ssc_freq = general->ssc_freq ? 100 : 120; else dev_priv->lvds_ssc_freq = general->ssc_freq ? 100 : 96; } } } static void parse_general_definitions(struct drm_i915_private *dev_priv, struct bdb_header *bdb) { struct bdb_general_definitions *general; const int crt_bus_map_table[] = { GPIOB, GPIOA, GPIOC, GPIOD, GPIOE, GPIOF, }; general = find_section(bdb, BDB_GENERAL_DEFINITIONS); if (general) { u16 block_size = get_blocksize(general); if (block_size >= sizeof(*general)) { int bus_pin = general->crt_ddc_gmbus_pin; DRM_DEBUG_KMS("crt_ddc_bus_pin: %d\n", bus_pin); if ((bus_pin >= 1) && (bus_pin <= 6)) { dev_priv->crt_ddc_bus = crt_bus_map_table[bus_pin-1]; } } else { DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n", block_size); } } } static void parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, struct bdb_header *bdb) { struct sdvo_device_mapping *p_mapping; struct bdb_general_definitions *p_defs; struct child_device_config *p_child; int i, child_device_num, count; u16 block_size; p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); if (!p_defs) { DRM_DEBUG_KMS("No general definition block is found\n"); return; } /* judge whether the size of child device meets the requirements. * If the child device size obtained from general definition block * is different with sizeof(struct child_device_config), skip the * parsing of sdvo device info */ if (p_defs->child_dev_size != sizeof(*p_child)) { /* different child dev size . Ignore it */ DRM_DEBUG_KMS("different child size is found. Invalid.\n"); return; } /* get the block size of general definitions */ block_size = get_blocksize(p_defs); /* get the number of child device */ child_device_num = (block_size - sizeof(*p_defs)) / sizeof(*p_child); count = 0; for (i = 0; i < child_device_num; i++) { p_child = &(p_defs->devices[i]); if (!p_child->device_type) { /* skip the device block if device type is invalid */ continue; } if (p_child->slave_addr != SLAVE_ADDR1 && p_child->slave_addr != SLAVE_ADDR2) { /* * If the slave address is neither 0x70 nor 0x72, * it is not a SDVO device. Skip it. */ continue; } if (p_child->dvo_port != DEVICE_PORT_DVOB && p_child->dvo_port != DEVICE_PORT_DVOC) { /* skip the incorrect SDVO port */ DRM_DEBUG_KMS("Incorrect SDVO port. Skip it \n"); continue; } DRM_DEBUG_KMS("the SDVO device with slave addr %2x is found on" " %s port\n", p_child->slave_addr, (p_child->dvo_port == DEVICE_PORT_DVOB) ? "SDVOB" : "SDVOC"); p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]); if (!p_mapping->initialized) { p_mapping->dvo_port = p_child->dvo_port; p_mapping->slave_addr = p_child->slave_addr; p_mapping->dvo_wiring = p_child->dvo_wiring; p_mapping->ddc_pin = p_child->ddc_pin; p_mapping->initialized = 1; } else { DRM_DEBUG_KMS("Maybe one SDVO port is shared by " "two SDVO device.\n"); } if (p_child->slave2_addr) { /* Maybe this is a SDVO device with multiple inputs */ /* And the mapping info is not added */ DRM_DEBUG_KMS("there exists the slave2_addr. Maybe this" " is a SDVO device with multiple inputs.\n"); } count++; } if (!count) { /* No SDVO device info is found */ DRM_DEBUG_KMS("No SDVO device info is found in VBT\n"); } return; } static void parse_driver_features(struct drm_i915_private *dev_priv, struct bdb_header *bdb) { struct drm_device *dev = dev_priv->dev; struct bdb_driver_features *driver; driver = find_section(bdb, BDB_DRIVER_FEATURES); if (!driver) return; if (driver && SUPPORTS_EDP(dev) && driver->lvds_config == BDB_DRIVER_FEATURE_EDP) { dev_priv->edp_support = 1; } else { dev_priv->edp_support = 0; } if (driver && driver->dual_frequency) dev_priv->render_reclock_avail = true; } static void parse_edp(struct drm_i915_private *dev_priv, struct bdb_header *bdb) { struct bdb_edp *edp; edp = find_section(bdb, BDB_EDP); if (!edp) { if (SUPPORTS_EDP(dev_priv->dev) && dev_priv->edp_support) { DRM_DEBUG_KMS("No eDP BDB found but eDP panel " "supported, assume 18bpp panel color " "depth.\n"); dev_priv->edp_bpp = 18; } return; } switch ((edp->color_depth >> (panel_type * 2)) & 3) { case EDP_18BPP: dev_priv->edp_bpp = 18; break; case EDP_24BPP: dev_priv->edp_bpp = 24; break; case EDP_30BPP: dev_priv->edp_bpp = 30; break; } } static void parse_device_mapping(struct drm_i915_private *dev_priv, struct bdb_header *bdb) { struct bdb_general_definitions *p_defs; struct child_device_config *p_child, *child_dev_ptr; int i, child_device_num, count; u16 block_size; p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); if (!p_defs) { DRM_DEBUG_KMS("No general definition block is found\n"); return; } /* judge whether the size of child device meets the requirements. * If the child device size obtained from general definition block * is different with sizeof(struct child_device_config), skip the * parsing of sdvo device info */ if (p_defs->child_dev_size != sizeof(*p_child)) { /* different child dev size . Ignore it */ DRM_DEBUG_KMS("different child size is found. Invalid.\n"); return; } /* get the block size of general definitions */ block_size = get_blocksize(p_defs); /* get the number of child device */ child_device_num = (block_size - sizeof(*p_defs)) / sizeof(*p_child); count = 0; /* get the number of child device that is present */ for (i = 0; i < child_device_num; i++) { p_child = &(p_defs->devices[i]); if (!p_child->device_type) { /* skip the device block if device type is invalid */ continue; } count++; } if (!count) { DRM_DEBUG_KMS("no child dev is parsed from VBT \n"); return; } dev_priv->child_dev = kzalloc(sizeof(*p_child) * count, GFP_KERNEL); if (!dev_priv->child_dev) { DRM_DEBUG_KMS("No memory space for child device\n"); return; } dev_priv->child_dev_num = count; count = 0; for (i = 0; i < child_device_num; i++) { p_child = &(p_defs->devices[i]); if (!p_child->device_type) { /* skip the device block if device type is invalid */ continue; } child_dev_ptr = dev_priv->child_dev + count; count++; memcpy((void *)child_dev_ptr, (void *)p_child, sizeof(*p_child)); } return; } /** * intel_init_bios - initialize VBIOS settings & find VBT * @dev: DRM device * * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers * to appropriate values. * * 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. */ bool intel_init_bios(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; struct pci_dev *pdev = dev->pdev; struct vbt_header *vbt = NULL; struct bdb_header *bdb; u8 __iomem *bios; size_t size; int i; bios = pci_map_rom(pdev, &size); if (!bios) return -1; /* Scour memory looking for the VBT signature */ for (i = 0; i + 4 < size; i++) { if (!memcmp(bios + i, "$VBT", 4)) { vbt = (struct vbt_header *)(bios + i); break; } } if (!vbt) { DRM_ERROR("VBT signature missing\n"); pci_unmap_rom(pdev, bios); return -1; } bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset); /* Grab useful general definitions */ parse_general_features(dev_priv, bdb); parse_general_definitions(dev_priv, bdb); parse_lfp_panel_data(dev_priv, bdb); parse_sdvo_panel_data(dev_priv, bdb); parse_sdvo_device_mapping(dev_priv, bdb); parse_device_mapping(dev_priv, bdb); parse_driver_features(dev_priv, bdb); parse_edp(dev_priv, bdb); pci_unmap_rom(pdev, bios); return 0; }