| /* |
| * 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 <eric@anholt.net> |
| * |
| */ |
| #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 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 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; |
| |
| /* 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_entry *entry; |
| struct lvds_dvo_timing *dvo_timing; |
| struct drm_display_mode *panel_fixed_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; |
| |
| lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA); |
| if (!lvds_lfp_data) |
| return; |
| |
| dev_priv->lvds_vbt = 1; |
| |
| entry = &lvds_lfp_data->data[lvds_options->panel_type]; |
| dvo_timing = &entry->dvo_timing; |
| |
| panel_fixed_mode = drm_calloc(1, sizeof(*panel_fixed_mode), |
| DRM_MEM_DRIVER); |
| |
| fill_detail_timing_data(panel_fixed_mode, dvo_timing); |
| |
| dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode; |
| |
| DRM_DEBUG("Found panel mode in BIOS VBT tables:\n"); |
| drm_mode_debug_printmodeline(panel_fixed_mode); |
| |
| 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 = drm_calloc(1, sizeof(*panel_fixed_mode), |
| DRM_MEM_DRIVER); |
| |
| 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 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_I855(dev_priv->dev)) |
| dev_priv->lvds_ssc_freq = general->ssc_freq ? 66 : 48; |
| else |
| dev_priv->lvds_ssc_freq = general->ssc_freq ? 100 : 96; |
| } |
| } |
| } |
| |
| 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, *block_ptr; |
| |
| p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); |
| if (!p_defs) { |
| DRM_DEBUG("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("different child size is found. Invalid.\n"); |
| return; |
| } |
| /* get the block size of general definitions */ |
| block_ptr = (u16 *)((char *)p_defs - 2); |
| block_size = *block_ptr; |
| /* 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("Incorrect SDVO port. Skip it \n"); |
| continue; |
| } |
| DRM_DEBUG("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->initialized = 1; |
| } else { |
| DRM_DEBUG("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("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("No SDVO device info is found in VBT\n"); |
| } |
| 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_lfp_panel_data(dev_priv, bdb); |
| parse_sdvo_panel_data(dev_priv, bdb); |
| parse_sdvo_device_mapping(dev_priv, bdb); |
| pci_unmap_rom(pdev, bios); |
| |
| return 0; |
| } |