Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright © 2006 Intel Corporation |
| 3 | * |
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 5 | * copy of this software and associated documentation files (the "Software"), |
| 6 | * to deal in the Software without restriction, including without limitation |
| 7 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
| 9 | * Software is furnished to do so, subject to the following conditions: |
| 10 | * |
| 11 | * The above copyright notice and this permission notice (including the next |
| 12 | * paragraph) shall be included in all copies or substantial portions of the |
| 13 | * Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 21 | * SOFTWARE. |
| 22 | * |
| 23 | * Authors: |
| 24 | * Eric Anholt <eric@anholt.net> |
| 25 | * |
| 26 | */ |
| 27 | #include "drmP.h" |
| 28 | #include "drm.h" |
| 29 | #include "i915_drm.h" |
| 30 | #include "i915_drv.h" |
| 31 | #include "intel_bios.h" |
| 32 | |
yakui_zhao | 9b9d172 | 2009-05-31 17:17:17 +0800 | [diff] [blame] | 33 | #define SLAVE_ADDR1 0x70 |
| 34 | #define SLAVE_ADDR2 0x72 |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 35 | |
| 36 | static void * |
| 37 | find_section(struct bdb_header *bdb, int section_id) |
| 38 | { |
| 39 | u8 *base = (u8 *)bdb; |
| 40 | int index = 0; |
| 41 | u16 total, current_size; |
| 42 | u8 current_id; |
| 43 | |
| 44 | /* skip to first section */ |
| 45 | index += bdb->header_size; |
| 46 | total = bdb->bdb_size; |
| 47 | |
| 48 | /* walk the sections looking for section_id */ |
| 49 | while (index < total) { |
| 50 | current_id = *(base + index); |
| 51 | index++; |
| 52 | current_size = *((u16 *)(base + index)); |
| 53 | index += 2; |
| 54 | if (current_id == section_id) |
| 55 | return base + index; |
| 56 | index += current_size; |
| 57 | } |
| 58 | |
| 59 | return NULL; |
| 60 | } |
| 61 | |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 62 | static void |
Ma Ling | 8863170 | 2009-05-13 11:19:55 +0800 | [diff] [blame] | 63 | fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode, |
| 64 | struct lvds_dvo_timing *dvo_timing) |
| 65 | { |
| 66 | panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) | |
| 67 | dvo_timing->hactive_lo; |
| 68 | panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay + |
| 69 | ((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo); |
| 70 | panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start + |
| 71 | dvo_timing->hsync_pulse_width; |
| 72 | panel_fixed_mode->htotal = panel_fixed_mode->hdisplay + |
| 73 | ((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo); |
| 74 | |
| 75 | panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) | |
| 76 | dvo_timing->vactive_lo; |
| 77 | panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay + |
| 78 | dvo_timing->vsync_off; |
| 79 | panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start + |
| 80 | dvo_timing->vsync_pulse_width; |
| 81 | panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay + |
| 82 | ((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo); |
| 83 | panel_fixed_mode->clock = dvo_timing->clock * 10; |
| 84 | panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED; |
| 85 | |
| 86 | /* Some VBTs have bogus h/vtotal values */ |
| 87 | if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal) |
| 88 | panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1; |
| 89 | if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal) |
| 90 | panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1; |
| 91 | |
| 92 | drm_mode_set_name(panel_fixed_mode); |
| 93 | } |
| 94 | |
| 95 | /* Try to find integrated panel data */ |
| 96 | static void |
| 97 | parse_lfp_panel_data(struct drm_i915_private *dev_priv, |
| 98 | struct bdb_header *bdb) |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 99 | { |
| 100 | struct bdb_lvds_options *lvds_options; |
| 101 | struct bdb_lvds_lfp_data *lvds_lfp_data; |
| 102 | struct bdb_lvds_lfp_data_entry *entry; |
| 103 | struct lvds_dvo_timing *dvo_timing; |
| 104 | struct drm_display_mode *panel_fixed_mode; |
| 105 | |
| 106 | /* Defaults if we can't find VBT info */ |
| 107 | dev_priv->lvds_dither = 0; |
| 108 | dev_priv->lvds_vbt = 0; |
| 109 | |
| 110 | lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); |
| 111 | if (!lvds_options) |
| 112 | return; |
| 113 | |
| 114 | dev_priv->lvds_dither = lvds_options->pixel_dither; |
| 115 | if (lvds_options->panel_type == 0xff) |
| 116 | return; |
| 117 | |
| 118 | lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA); |
| 119 | if (!lvds_lfp_data) |
| 120 | return; |
| 121 | |
| 122 | dev_priv->lvds_vbt = 1; |
| 123 | |
| 124 | entry = &lvds_lfp_data->data[lvds_options->panel_type]; |
| 125 | dvo_timing = &entry->dvo_timing; |
| 126 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 127 | panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 128 | |
Ma Ling | 8863170 | 2009-05-13 11:19:55 +0800 | [diff] [blame] | 129 | fill_detail_timing_data(panel_fixed_mode, dvo_timing); |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 130 | |
Ma Ling | 8863170 | 2009-05-13 11:19:55 +0800 | [diff] [blame] | 131 | dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode; |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 132 | |
| 133 | DRM_DEBUG("Found panel mode in BIOS VBT tables:\n"); |
| 134 | drm_mode_debug_printmodeline(panel_fixed_mode); |
| 135 | |
| 136 | return; |
| 137 | } |
| 138 | |
Ma Ling | 8863170 | 2009-05-13 11:19:55 +0800 | [diff] [blame] | 139 | /* Try to find sdvo panel data */ |
| 140 | static void |
| 141 | parse_sdvo_panel_data(struct drm_i915_private *dev_priv, |
| 142 | struct bdb_header *bdb) |
| 143 | { |
| 144 | struct bdb_sdvo_lvds_options *sdvo_lvds_options; |
| 145 | struct lvds_dvo_timing *dvo_timing; |
| 146 | struct drm_display_mode *panel_fixed_mode; |
| 147 | |
| 148 | dev_priv->sdvo_lvds_vbt_mode = NULL; |
| 149 | |
| 150 | sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); |
| 151 | if (!sdvo_lvds_options) |
| 152 | return; |
| 153 | |
| 154 | dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS); |
| 155 | if (!dvo_timing) |
| 156 | return; |
| 157 | |
Eric Anholt | 9a298b2 | 2009-03-24 12:23:04 -0700 | [diff] [blame] | 158 | panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); |
Ma Ling | 8863170 | 2009-05-13 11:19:55 +0800 | [diff] [blame] | 159 | |
| 160 | if (!panel_fixed_mode) |
| 161 | return; |
| 162 | |
| 163 | fill_detail_timing_data(panel_fixed_mode, |
| 164 | dvo_timing + sdvo_lvds_options->panel_type); |
| 165 | |
| 166 | dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode; |
| 167 | |
| 168 | return; |
| 169 | } |
| 170 | |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 171 | static void |
| 172 | parse_general_features(struct drm_i915_private *dev_priv, |
| 173 | struct bdb_header *bdb) |
| 174 | { |
| 175 | struct bdb_general_features *general; |
| 176 | |
| 177 | /* Set sensible defaults in case we can't find the general block */ |
| 178 | dev_priv->int_tv_support = 1; |
| 179 | dev_priv->int_crt_support = 1; |
| 180 | |
| 181 | general = find_section(bdb, BDB_GENERAL_FEATURES); |
| 182 | if (general) { |
| 183 | dev_priv->int_tv_support = general->int_tv_support; |
| 184 | dev_priv->int_crt_support = general->int_crt_support; |
Kristian Høgsberg | 43565a0 | 2009-02-13 20:56:52 -0500 | [diff] [blame] | 185 | dev_priv->lvds_use_ssc = general->enable_ssc; |
| 186 | |
| 187 | if (dev_priv->lvds_use_ssc) { |
| 188 | if (IS_I855(dev_priv->dev)) |
| 189 | dev_priv->lvds_ssc_freq = general->ssc_freq ? 66 : 48; |
| 190 | else |
| 191 | dev_priv->lvds_ssc_freq = general->ssc_freq ? 100 : 96; |
| 192 | } |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 193 | } |
| 194 | } |
| 195 | |
yakui_zhao | 9b9d172 | 2009-05-31 17:17:17 +0800 | [diff] [blame] | 196 | static void |
| 197 | parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, |
| 198 | struct bdb_header *bdb) |
| 199 | { |
| 200 | struct sdvo_device_mapping *p_mapping; |
| 201 | struct bdb_general_definitions *p_defs; |
| 202 | struct child_device_config *p_child; |
| 203 | int i, child_device_num, count; |
| 204 | u16 block_size, *block_ptr; |
| 205 | |
| 206 | p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); |
| 207 | if (!p_defs) { |
| 208 | DRM_DEBUG("No general definition block is found\n"); |
| 209 | return; |
| 210 | } |
| 211 | /* judge whether the size of child device meets the requirements. |
| 212 | * If the child device size obtained from general definition block |
| 213 | * is different with sizeof(struct child_device_config), skip the |
| 214 | * parsing of sdvo device info |
| 215 | */ |
| 216 | if (p_defs->child_dev_size != sizeof(*p_child)) { |
| 217 | /* different child dev size . Ignore it */ |
| 218 | DRM_DEBUG("different child size is found. Invalid.\n"); |
| 219 | return; |
| 220 | } |
| 221 | /* get the block size of general definitions */ |
| 222 | block_ptr = (u16 *)((char *)p_defs - 2); |
| 223 | block_size = *block_ptr; |
| 224 | /* get the number of child device */ |
| 225 | child_device_num = (block_size - sizeof(*p_defs)) / |
| 226 | sizeof(*p_child); |
| 227 | count = 0; |
| 228 | for (i = 0; i < child_device_num; i++) { |
| 229 | p_child = &(p_defs->devices[i]); |
| 230 | if (!p_child->device_type) { |
| 231 | /* skip the device block if device type is invalid */ |
| 232 | continue; |
| 233 | } |
| 234 | if (p_child->slave_addr != SLAVE_ADDR1 && |
| 235 | p_child->slave_addr != SLAVE_ADDR2) { |
| 236 | /* |
| 237 | * If the slave address is neither 0x70 nor 0x72, |
| 238 | * it is not a SDVO device. Skip it. |
| 239 | */ |
| 240 | continue; |
| 241 | } |
| 242 | if (p_child->dvo_port != DEVICE_PORT_DVOB && |
| 243 | p_child->dvo_port != DEVICE_PORT_DVOC) { |
| 244 | /* skip the incorrect SDVO port */ |
| 245 | DRM_DEBUG("Incorrect SDVO port. Skip it \n"); |
| 246 | continue; |
| 247 | } |
| 248 | DRM_DEBUG("the SDVO device with slave addr %2x is found on " |
| 249 | "%s port\n", |
| 250 | p_child->slave_addr, |
| 251 | (p_child->dvo_port == DEVICE_PORT_DVOB) ? |
| 252 | "SDVOB" : "SDVOC"); |
| 253 | p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]); |
| 254 | if (!p_mapping->initialized) { |
| 255 | p_mapping->dvo_port = p_child->dvo_port; |
| 256 | p_mapping->slave_addr = p_child->slave_addr; |
| 257 | p_mapping->dvo_wiring = p_child->dvo_wiring; |
| 258 | p_mapping->initialized = 1; |
| 259 | } else { |
| 260 | DRM_DEBUG("Maybe one SDVO port is shared by " |
| 261 | "two SDVO device.\n"); |
| 262 | } |
| 263 | if (p_child->slave2_addr) { |
| 264 | /* Maybe this is a SDVO device with multiple inputs */ |
| 265 | /* And the mapping info is not added */ |
| 266 | DRM_DEBUG("there exists the slave2_addr. Maybe this " |
| 267 | "is a SDVO device with multiple inputs.\n"); |
| 268 | } |
| 269 | count++; |
| 270 | } |
| 271 | |
| 272 | if (!count) { |
| 273 | /* No SDVO device info is found */ |
| 274 | DRM_DEBUG("No SDVO device info is found in VBT\n"); |
| 275 | } |
| 276 | return; |
| 277 | } |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 278 | /** |
| 279 | * intel_init_bios - initialize VBIOS settings & find VBT |
| 280 | * @dev: DRM device |
| 281 | * |
| 282 | * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers |
| 283 | * to appropriate values. |
| 284 | * |
| 285 | * VBT existence is a sanity check that is relied on by other i830_bios.c code. |
| 286 | * Note that it would be better to use a BIOS call to get the VBT, as BIOSes may |
| 287 | * feed an updated VBT back through that, compared to what we'll fetch using |
| 288 | * this method of groping around in the BIOS data. |
| 289 | * |
| 290 | * Returns 0 on success, nonzero on failure. |
| 291 | */ |
| 292 | bool |
| 293 | intel_init_bios(struct drm_device *dev) |
| 294 | { |
| 295 | struct drm_i915_private *dev_priv = dev->dev_private; |
| 296 | struct pci_dev *pdev = dev->pdev; |
| 297 | struct vbt_header *vbt = NULL; |
| 298 | struct bdb_header *bdb; |
| 299 | u8 __iomem *bios; |
| 300 | size_t size; |
| 301 | int i; |
| 302 | |
| 303 | bios = pci_map_rom(pdev, &size); |
| 304 | if (!bios) |
| 305 | return -1; |
| 306 | |
| 307 | /* Scour memory looking for the VBT signature */ |
| 308 | for (i = 0; i + 4 < size; i++) { |
| 309 | if (!memcmp(bios + i, "$VBT", 4)) { |
| 310 | vbt = (struct vbt_header *)(bios + i); |
| 311 | break; |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | if (!vbt) { |
| 316 | DRM_ERROR("VBT signature missing\n"); |
| 317 | pci_unmap_rom(pdev, bios); |
| 318 | return -1; |
| 319 | } |
| 320 | |
| 321 | bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset); |
| 322 | |
| 323 | /* Grab useful general definitions */ |
| 324 | parse_general_features(dev_priv, bdb); |
Ma Ling | 8863170 | 2009-05-13 11:19:55 +0800 | [diff] [blame] | 325 | parse_lfp_panel_data(dev_priv, bdb); |
| 326 | parse_sdvo_panel_data(dev_priv, bdb); |
yakui_zhao | 9b9d172 | 2009-05-31 17:17:17 +0800 | [diff] [blame] | 327 | parse_sdvo_device_mapping(dev_priv, bdb); |
Jesse Barnes | 79e5394 | 2008-11-07 14:24:08 -0800 | [diff] [blame] | 328 | pci_unmap_rom(pdev, bios); |
| 329 | |
| 330 | return 0; |
| 331 | } |