| /* |
| * 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 <drm/drm_dp_helper.h> |
| #include <drm/drmP.h> |
| #include <drm/i915_drm.h> |
| #include "i915_drv.h" |
| #include "intel_bios.h" |
| |
| /** |
| * DOC: Video BIOS Table (VBT) |
| * |
| * The Video BIOS Table, or VBT, provides platform and board specific |
| * configuration information to the driver that is not discoverable or available |
| * through other means. The configuration is mostly related to display |
| * hardware. The VBT is available via the ACPI OpRegion or, on older systems, in |
| * the PCI ROM. |
| * |
| * The VBT consists of a VBT Header (defined as &struct vbt_header), a BDB |
| * Header (&struct bdb_header), and a number of BIOS Data Blocks (BDB) that |
| * contain the actual configuration information. The VBT Header, and thus the |
| * VBT, begins with "$VBT" signature. The VBT Header contains the offset of the |
| * BDB Header. The data blocks are concatenated after the BDB Header. The data |
| * blocks have a 1-byte Block ID, 2-byte Block Size, and Block Size bytes of |
| * data. (Block 53, the MIPI Sequence Block is an exception.) |
| * |
| * The driver parses the VBT during load. The relevant information is stored in |
| * driver private data for ease of use, and the actual VBT is not read after |
| * that. |
| */ |
| |
| #define SLAVE_ADDR1 0x70 |
| #define SLAVE_ADDR2 0x72 |
| |
| static int panel_type; |
| |
| /* Get BDB block size given a pointer to Block ID. */ |
| static u32 _get_blocksize(const u8 *block_base) |
| { |
| /* The MIPI Sequence Block v3+ has a separate size field. */ |
| if (*block_base == BDB_MIPI_SEQUENCE && *(block_base + 3) >= 3) |
| return *((const u32 *)(block_base + 4)); |
| else |
| return *((const u16 *)(block_base + 1)); |
| } |
| |
| /* Get BDB block size give a pointer to data after Block ID and Block Size. */ |
| static u32 get_blocksize(const void *block_data) |
| { |
| return _get_blocksize(block_data - 3); |
| } |
| |
| static const void * |
| find_section(const void *_bdb, int section_id) |
| { |
| const struct bdb_header *bdb = _bdb; |
| const u8 *base = _bdb; |
| int index = 0; |
| u32 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 + 3 < total) { |
| current_id = *(base + index); |
| current_size = _get_blocksize(base + index); |
| index += 3; |
| |
| if (index + current_size > total) |
| return NULL; |
| |
| 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, |
| const 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); |
| } |
| |
| static const struct lvds_dvo_timing * |
| get_lvds_dvo_timing(const struct bdb_lvds_lfp_data *lvds_lfp_data, |
| const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs, |
| int index) |
| { |
| /* |
| * 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 |
| */ |
| |
| int lfp_data_size = |
| lvds_lfp_data_ptrs->ptr[1].dvo_timing_offset - |
| lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset; |
| int dvo_timing_offset = |
| lvds_lfp_data_ptrs->ptr[0].dvo_timing_offset - |
| lvds_lfp_data_ptrs->ptr[0].fp_timing_offset; |
| char *entry = (char *)lvds_lfp_data->data + lfp_data_size * index; |
| |
| return (struct lvds_dvo_timing *)(entry + dvo_timing_offset); |
| } |
| |
| /* get lvds_fp_timing entry |
| * this function may return NULL if the corresponding entry is invalid |
| */ |
| static const struct lvds_fp_timing * |
| get_lvds_fp_timing(const struct bdb_header *bdb, |
| const struct bdb_lvds_lfp_data *data, |
| const struct bdb_lvds_lfp_data_ptrs *ptrs, |
| int index) |
| { |
| size_t data_ofs = (const u8 *)data - (const u8 *)bdb; |
| u16 data_size = ((const u16 *)data)[-1]; /* stored in header */ |
| size_t ofs; |
| |
| if (index >= ARRAY_SIZE(ptrs->ptr)) |
| return NULL; |
| ofs = ptrs->ptr[index].fp_timing_offset; |
| if (ofs < data_ofs || |
| ofs + sizeof(struct lvds_fp_timing) > data_ofs + data_size) |
| return NULL; |
| return (const struct lvds_fp_timing *)((const u8 *)bdb + ofs); |
| } |
| |
| /* Try to find integrated panel data */ |
| static void |
| parse_lfp_panel_data(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| const struct bdb_lvds_options *lvds_options; |
| const struct bdb_lvds_lfp_data *lvds_lfp_data; |
| const struct bdb_lvds_lfp_data_ptrs *lvds_lfp_data_ptrs; |
| const struct lvds_dvo_timing *panel_dvo_timing; |
| const struct lvds_fp_timing *fp_timing; |
| struct drm_display_mode *panel_fixed_mode; |
| int drrs_mode; |
| |
| lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); |
| if (!lvds_options) |
| return; |
| |
| dev_priv->vbt.lvds_dither = lvds_options->pixel_dither; |
| if (lvds_options->panel_type == 0xff) |
| return; |
| |
| panel_type = lvds_options->panel_type; |
| |
| drrs_mode = (lvds_options->dps_panel_type_bits |
| >> (panel_type * 2)) & MODE_MASK; |
| /* |
| * VBT has static DRRS = 0 and seamless DRRS = 2. |
| * The below piece of code is required to adjust vbt.drrs_type |
| * to match the enum drrs_support_type. |
| */ |
| switch (drrs_mode) { |
| case 0: |
| dev_priv->vbt.drrs_type = STATIC_DRRS_SUPPORT; |
| DRM_DEBUG_KMS("DRRS supported mode is static\n"); |
| break; |
| case 2: |
| dev_priv->vbt.drrs_type = SEAMLESS_DRRS_SUPPORT; |
| DRM_DEBUG_KMS("DRRS supported mode is seamless\n"); |
| break; |
| default: |
| dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED; |
| DRM_DEBUG_KMS("DRRS not supported (VBT input)\n"); |
| break; |
| } |
| |
| 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->vbt.lvds_vbt = 1; |
| |
| panel_dvo_timing = get_lvds_dvo_timing(lvds_lfp_data, |
| lvds_lfp_data_ptrs, |
| lvds_options->panel_type); |
| |
| panel_fixed_mode = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL); |
| if (!panel_fixed_mode) |
| return; |
| |
| fill_detail_timing_data(panel_fixed_mode, panel_dvo_timing); |
| |
| dev_priv->vbt.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); |
| |
| fp_timing = get_lvds_fp_timing(bdb, lvds_lfp_data, |
| lvds_lfp_data_ptrs, |
| lvds_options->panel_type); |
| if (fp_timing) { |
| /* check the resolution, just to be sure */ |
| if (fp_timing->x_res == panel_fixed_mode->hdisplay && |
| fp_timing->y_res == panel_fixed_mode->vdisplay) { |
| dev_priv->vbt.bios_lvds_val = fp_timing->lvds_reg_val; |
| DRM_DEBUG_KMS("VBT initial LVDS value %x\n", |
| dev_priv->vbt.bios_lvds_val); |
| } |
| } |
| } |
| |
| static void |
| parse_lfp_backlight(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| const struct bdb_lfp_backlight_data *backlight_data; |
| const struct bdb_lfp_backlight_data_entry *entry; |
| |
| backlight_data = find_section(bdb, BDB_LVDS_BACKLIGHT); |
| if (!backlight_data) |
| return; |
| |
| if (backlight_data->entry_size != sizeof(backlight_data->data[0])) { |
| DRM_DEBUG_KMS("Unsupported backlight data entry size %u\n", |
| backlight_data->entry_size); |
| return; |
| } |
| |
| entry = &backlight_data->data[panel_type]; |
| |
| dev_priv->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM; |
| if (!dev_priv->vbt.backlight.present) { |
| DRM_DEBUG_KMS("PWM backlight not present in VBT (type %u)\n", |
| entry->type); |
| return; |
| } |
| |
| dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz; |
| dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm; |
| dev_priv->vbt.backlight.min_brightness = entry->min_brightness; |
| DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, " |
| "active %s, min brightness %u, level %u\n", |
| dev_priv->vbt.backlight.pwm_freq_hz, |
| dev_priv->vbt.backlight.active_low_pwm ? "low" : "high", |
| dev_priv->vbt.backlight.min_brightness, |
| backlight_data->level[panel_type]); |
| } |
| |
| /* Try to find sdvo panel data */ |
| static void |
| parse_sdvo_panel_data(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| const struct lvds_dvo_timing *dvo_timing; |
| struct drm_display_mode *panel_fixed_mode; |
| int index; |
| |
| index = i915.vbt_sdvo_panel_type; |
| if (index == -2) { |
| DRM_DEBUG_KMS("Ignore SDVO panel mode from BIOS VBT tables.\n"); |
| return; |
| } |
| |
| if (index == -1) { |
| const struct bdb_sdvo_lvds_options *sdvo_lvds_options; |
| |
| sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS); |
| if (!sdvo_lvds_options) |
| return; |
| |
| index = sdvo_lvds_options->panel_type; |
| } |
| |
| 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 + index); |
| |
| dev_priv->vbt.sdvo_lvds_vbt_mode = panel_fixed_mode; |
| |
| DRM_DEBUG_KMS("Found SDVO panel mode in BIOS VBT tables:\n"); |
| drm_mode_debug_printmodeline(panel_fixed_mode); |
| } |
| |
| static int intel_bios_ssc_frequency(struct drm_i915_private *dev_priv, |
| bool alternate) |
| { |
| switch (INTEL_INFO(dev_priv)->gen) { |
| case 2: |
| return alternate ? 66667 : 48000; |
| case 3: |
| case 4: |
| return alternate ? 100000 : 96000; |
| default: |
| return alternate ? 100000 : 120000; |
| } |
| } |
| |
| static void |
| parse_general_features(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| const struct bdb_general_features *general; |
| |
| general = find_section(bdb, BDB_GENERAL_FEATURES); |
| if (!general) |
| return; |
| |
| dev_priv->vbt.int_tv_support = general->int_tv_support; |
| /* int_crt_support can't be trusted on earlier platforms */ |
| if (bdb->version >= 155 && |
| (HAS_DDI(dev_priv) || IS_VALLEYVIEW(dev_priv))) |
| dev_priv->vbt.int_crt_support = general->int_crt_support; |
| dev_priv->vbt.lvds_use_ssc = general->enable_ssc; |
| dev_priv->vbt.lvds_ssc_freq = |
| intel_bios_ssc_frequency(dev_priv, general->ssc_freq); |
| dev_priv->vbt.display_clock_mode = general->display_clock_mode; |
| dev_priv->vbt.fdi_rx_polarity_inverted = general->fdi_rx_polarity_inverted; |
| DRM_DEBUG_KMS("BDB_GENERAL_FEATURES int_tv_support %d int_crt_support %d lvds_use_ssc %d lvds_ssc_freq %d display_clock_mode %d fdi_rx_polarity_inverted %d\n", |
| dev_priv->vbt.int_tv_support, |
| dev_priv->vbt.int_crt_support, |
| dev_priv->vbt.lvds_use_ssc, |
| dev_priv->vbt.lvds_ssc_freq, |
| dev_priv->vbt.display_clock_mode, |
| dev_priv->vbt.fdi_rx_polarity_inverted); |
| } |
| |
| static void |
| parse_general_definitions(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| const struct bdb_general_definitions *general; |
| |
| 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 (intel_gmbus_is_valid_pin(dev_priv, bus_pin)) |
| dev_priv->vbt.crt_ddc_pin = bus_pin; |
| } else { |
| DRM_DEBUG_KMS("BDB_GD too small (%d). Invalid.\n", |
| block_size); |
| } |
| } |
| } |
| |
| static const union child_device_config * |
| child_device_ptr(const struct bdb_general_definitions *p_defs, int i) |
| { |
| return (const void *) &p_defs->devices[i * p_defs->child_dev_size]; |
| } |
| |
| static void |
| parse_sdvo_device_mapping(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| struct sdvo_device_mapping *p_mapping; |
| const struct bdb_general_definitions *p_defs; |
| const struct old_child_dev_config *child; /* legacy */ |
| 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, unable to construct sdvo mapping.\n"); |
| return; |
| } |
| |
| /* |
| * Only parse SDVO mappings when the general definitions block child |
| * device size matches that of the *legacy* child device config |
| * struct. Thus, SDVO mapping will be skipped for newer VBT. |
| */ |
| if (p_defs->child_dev_size != sizeof(*child)) { |
| DRM_DEBUG_KMS("Unsupported child device size for SDVO mapping.\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)) / |
| p_defs->child_dev_size; |
| count = 0; |
| for (i = 0; i < child_device_num; i++) { |
| child = &child_device_ptr(p_defs, i)->old; |
| if (!child->device_type) { |
| /* skip the device block if device type is invalid */ |
| continue; |
| } |
| if (child->slave_addr != SLAVE_ADDR1 && |
| child->slave_addr != SLAVE_ADDR2) { |
| /* |
| * If the slave address is neither 0x70 nor 0x72, |
| * it is not a SDVO device. Skip it. |
| */ |
| continue; |
| } |
| if (child->dvo_port != DEVICE_PORT_DVOB && |
| 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", |
| child->slave_addr, |
| (child->dvo_port == DEVICE_PORT_DVOB) ? |
| "SDVOB" : "SDVOC"); |
| p_mapping = &(dev_priv->sdvo_mappings[child->dvo_port - 1]); |
| if (!p_mapping->initialized) { |
| p_mapping->dvo_port = child->dvo_port; |
| p_mapping->slave_addr = child->slave_addr; |
| p_mapping->dvo_wiring = child->dvo_wiring; |
| p_mapping->ddc_pin = child->ddc_pin; |
| p_mapping->i2c_pin = child->i2c_pin; |
| p_mapping->initialized = 1; |
| DRM_DEBUG_KMS("SDVO device: dvo=%x, addr=%x, wiring=%d, ddc_pin=%d, i2c_pin=%d\n", |
| p_mapping->dvo_port, |
| p_mapping->slave_addr, |
| p_mapping->dvo_wiring, |
| p_mapping->ddc_pin, |
| p_mapping->i2c_pin); |
| } else { |
| DRM_DEBUG_KMS("Maybe one SDVO port is shared by " |
| "two SDVO device.\n"); |
| } |
| if (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, |
| const struct bdb_header *bdb) |
| { |
| const struct bdb_driver_features *driver; |
| |
| driver = find_section(bdb, BDB_DRIVER_FEATURES); |
| if (!driver) |
| return; |
| |
| if (driver->lvds_config == BDB_DRIVER_FEATURE_EDP) |
| dev_priv->vbt.edp_support = 1; |
| |
| if (driver->dual_frequency) |
| dev_priv->render_reclock_avail = true; |
| |
| DRM_DEBUG_KMS("DRRS State Enabled:%d\n", driver->drrs_enabled); |
| /* |
| * If DRRS is not supported, drrs_type has to be set to 0. |
| * This is because, VBT is configured in such a way that |
| * static DRRS is 0 and DRRS not supported is represented by |
| * driver->drrs_enabled=false |
| */ |
| if (!driver->drrs_enabled) |
| dev_priv->vbt.drrs_type = DRRS_NOT_SUPPORTED; |
| } |
| |
| static void |
| parse_edp(struct drm_i915_private *dev_priv, const struct bdb_header *bdb) |
| { |
| const struct bdb_edp *edp; |
| const struct edp_power_seq *edp_pps; |
| const struct edp_link_params *edp_link_params; |
| |
| edp = find_section(bdb, BDB_EDP); |
| if (!edp) { |
| if (dev_priv->vbt.edp_support) |
| DRM_DEBUG_KMS("No eDP BDB found but eDP panel supported.\n"); |
| return; |
| } |
| |
| switch ((edp->color_depth >> (panel_type * 2)) & 3) { |
| case EDP_18BPP: |
| dev_priv->vbt.edp_bpp = 18; |
| break; |
| case EDP_24BPP: |
| dev_priv->vbt.edp_bpp = 24; |
| break; |
| case EDP_30BPP: |
| dev_priv->vbt.edp_bpp = 30; |
| break; |
| } |
| |
| /* Get the eDP sequencing and link info */ |
| edp_pps = &edp->power_seqs[panel_type]; |
| edp_link_params = &edp->link_params[panel_type]; |
| |
| dev_priv->vbt.edp_pps = *edp_pps; |
| |
| switch (edp_link_params->rate) { |
| case EDP_RATE_1_62: |
| dev_priv->vbt.edp_rate = DP_LINK_BW_1_62; |
| break; |
| case EDP_RATE_2_7: |
| dev_priv->vbt.edp_rate = DP_LINK_BW_2_7; |
| break; |
| default: |
| DRM_DEBUG_KMS("VBT has unknown eDP link rate value %u\n", |
| edp_link_params->rate); |
| break; |
| } |
| |
| switch (edp_link_params->lanes) { |
| case EDP_LANE_1: |
| dev_priv->vbt.edp_lanes = 1; |
| break; |
| case EDP_LANE_2: |
| dev_priv->vbt.edp_lanes = 2; |
| break; |
| case EDP_LANE_4: |
| dev_priv->vbt.edp_lanes = 4; |
| break; |
| default: |
| DRM_DEBUG_KMS("VBT has unknown eDP lane count value %u\n", |
| edp_link_params->lanes); |
| break; |
| } |
| |
| switch (edp_link_params->preemphasis) { |
| case EDP_PREEMPHASIS_NONE: |
| dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_0; |
| break; |
| case EDP_PREEMPHASIS_3_5dB: |
| dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_1; |
| break; |
| case EDP_PREEMPHASIS_6dB: |
| dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_2; |
| break; |
| case EDP_PREEMPHASIS_9_5dB: |
| dev_priv->vbt.edp_preemphasis = DP_TRAIN_PRE_EMPH_LEVEL_3; |
| break; |
| default: |
| DRM_DEBUG_KMS("VBT has unknown eDP pre-emphasis value %u\n", |
| edp_link_params->preemphasis); |
| break; |
| } |
| |
| switch (edp_link_params->vswing) { |
| case EDP_VSWING_0_4V: |
| dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_0; |
| break; |
| case EDP_VSWING_0_6V: |
| dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_1; |
| break; |
| case EDP_VSWING_0_8V: |
| dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_2; |
| break; |
| case EDP_VSWING_1_2V: |
| dev_priv->vbt.edp_vswing = DP_TRAIN_VOLTAGE_SWING_LEVEL_3; |
| break; |
| default: |
| DRM_DEBUG_KMS("VBT has unknown eDP voltage swing value %u\n", |
| edp_link_params->vswing); |
| break; |
| } |
| |
| if (bdb->version >= 173) { |
| uint8_t vswing; |
| |
| /* Don't read from VBT if module parameter has valid value*/ |
| if (i915.edp_vswing) { |
| dev_priv->edp_low_vswing = i915.edp_vswing == 1; |
| } else { |
| vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF; |
| dev_priv->edp_low_vswing = vswing == 0; |
| } |
| } |
| } |
| |
| static void |
| parse_psr(struct drm_i915_private *dev_priv, const struct bdb_header *bdb) |
| { |
| const struct bdb_psr *psr; |
| const struct psr_table *psr_table; |
| |
| psr = find_section(bdb, BDB_PSR); |
| if (!psr) { |
| DRM_DEBUG_KMS("No PSR BDB found.\n"); |
| return; |
| } |
| |
| psr_table = &psr->psr_table[panel_type]; |
| |
| dev_priv->vbt.psr.full_link = psr_table->full_link; |
| dev_priv->vbt.psr.require_aux_wakeup = psr_table->require_aux_to_wakeup; |
| |
| /* Allowed VBT values goes from 0 to 15 */ |
| dev_priv->vbt.psr.idle_frames = psr_table->idle_frames < 0 ? 0 : |
| psr_table->idle_frames > 15 ? 15 : psr_table->idle_frames; |
| |
| switch (psr_table->lines_to_wait) { |
| case 0: |
| dev_priv->vbt.psr.lines_to_wait = PSR_0_LINES_TO_WAIT; |
| break; |
| case 1: |
| dev_priv->vbt.psr.lines_to_wait = PSR_1_LINE_TO_WAIT; |
| break; |
| case 2: |
| dev_priv->vbt.psr.lines_to_wait = PSR_4_LINES_TO_WAIT; |
| break; |
| case 3: |
| dev_priv->vbt.psr.lines_to_wait = PSR_8_LINES_TO_WAIT; |
| break; |
| default: |
| DRM_DEBUG_KMS("VBT has unknown PSR lines to wait %u\n", |
| psr_table->lines_to_wait); |
| break; |
| } |
| |
| dev_priv->vbt.psr.tp1_wakeup_time = psr_table->tp1_wakeup_time; |
| dev_priv->vbt.psr.tp2_tp3_wakeup_time = psr_table->tp2_tp3_wakeup_time; |
| } |
| |
| static void |
| parse_mipi_config(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| const struct bdb_mipi_config *start; |
| const struct mipi_config *config; |
| const struct mipi_pps_data *pps; |
| |
| /* parse MIPI blocks only if LFP type is MIPI */ |
| if (!dev_priv->vbt.has_mipi) |
| return; |
| |
| /* Initialize this to undefined indicating no generic MIPI support */ |
| dev_priv->vbt.dsi.panel_id = MIPI_DSI_UNDEFINED_PANEL_ID; |
| |
| /* Block #40 is already parsed and panel_fixed_mode is |
| * stored in dev_priv->lfp_lvds_vbt_mode |
| * resuse this when needed |
| */ |
| |
| /* Parse #52 for panel index used from panel_type already |
| * parsed |
| */ |
| start = find_section(bdb, BDB_MIPI_CONFIG); |
| if (!start) { |
| DRM_DEBUG_KMS("No MIPI config BDB found"); |
| return; |
| } |
| |
| DRM_DEBUG_DRIVER("Found MIPI Config block, panel index = %d\n", |
| panel_type); |
| |
| /* |
| * get hold of the correct configuration block and pps data as per |
| * the panel_type as index |
| */ |
| config = &start->config[panel_type]; |
| pps = &start->pps[panel_type]; |
| |
| /* store as of now full data. Trim when we realise all is not needed */ |
| dev_priv->vbt.dsi.config = kmemdup(config, sizeof(struct mipi_config), GFP_KERNEL); |
| if (!dev_priv->vbt.dsi.config) |
| return; |
| |
| dev_priv->vbt.dsi.pps = kmemdup(pps, sizeof(struct mipi_pps_data), GFP_KERNEL); |
| if (!dev_priv->vbt.dsi.pps) { |
| kfree(dev_priv->vbt.dsi.config); |
| return; |
| } |
| |
| /* We have mandatory mipi config blocks. Initialize as generic panel */ |
| dev_priv->vbt.dsi.panel_id = MIPI_DSI_GENERIC_PANEL_ID; |
| } |
| |
| /* Find the sequence block and size for the given panel. */ |
| static const u8 * |
| find_panel_sequence_block(const struct bdb_mipi_sequence *sequence, |
| u16 panel_id, u32 *seq_size) |
| { |
| u32 total = get_blocksize(sequence); |
| const u8 *data = &sequence->data[0]; |
| u8 current_id; |
| u32 current_size; |
| int header_size = sequence->version >= 3 ? 5 : 3; |
| int index = 0; |
| int i; |
| |
| /* skip new block size */ |
| if (sequence->version >= 3) |
| data += 4; |
| |
| for (i = 0; i < MAX_MIPI_CONFIGURATIONS && index < total; i++) { |
| if (index + header_size > total) { |
| DRM_ERROR("Invalid sequence block (header)\n"); |
| return NULL; |
| } |
| |
| current_id = *(data + index); |
| if (sequence->version >= 3) |
| current_size = *((const u32 *)(data + index + 1)); |
| else |
| current_size = *((const u16 *)(data + index + 1)); |
| |
| index += header_size; |
| |
| if (index + current_size > total) { |
| DRM_ERROR("Invalid sequence block\n"); |
| return NULL; |
| } |
| |
| if (current_id == panel_id) { |
| *seq_size = current_size; |
| return data + index; |
| } |
| |
| index += current_size; |
| } |
| |
| DRM_ERROR("Sequence block detected but no valid configuration\n"); |
| |
| return NULL; |
| } |
| |
| static int goto_next_sequence(const u8 *data, int index, int total) |
| { |
| u16 len; |
| |
| /* Skip Sequence Byte. */ |
| for (index = index + 1; index < total; index += len) { |
| u8 operation_byte = *(data + index); |
| index++; |
| |
| switch (operation_byte) { |
| case MIPI_SEQ_ELEM_END: |
| return index; |
| case MIPI_SEQ_ELEM_SEND_PKT: |
| if (index + 4 > total) |
| return 0; |
| |
| len = *((const u16 *)(data + index + 2)) + 4; |
| break; |
| case MIPI_SEQ_ELEM_DELAY: |
| len = 4; |
| break; |
| case MIPI_SEQ_ELEM_GPIO: |
| len = 2; |
| break; |
| case MIPI_SEQ_ELEM_I2C: |
| if (index + 7 > total) |
| return 0; |
| len = *(data + index + 6) + 7; |
| break; |
| default: |
| DRM_ERROR("Unknown operation byte\n"); |
| return 0; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int goto_next_sequence_v3(const u8 *data, int index, int total) |
| { |
| int seq_end; |
| u16 len; |
| u32 size_of_sequence; |
| |
| /* |
| * Could skip sequence based on Size of Sequence alone, but also do some |
| * checking on the structure. |
| */ |
| if (total < 5) { |
| DRM_ERROR("Too small sequence size\n"); |
| return 0; |
| } |
| |
| /* Skip Sequence Byte. */ |
| index++; |
| |
| /* |
| * Size of Sequence. Excludes the Sequence Byte and the size itself, |
| * includes MIPI_SEQ_ELEM_END byte, excludes the final MIPI_SEQ_END |
| * byte. |
| */ |
| size_of_sequence = *((const uint32_t *)(data + index)); |
| index += 4; |
| |
| seq_end = index + size_of_sequence; |
| if (seq_end > total) { |
| DRM_ERROR("Invalid sequence size\n"); |
| return 0; |
| } |
| |
| for (; index < total; index += len) { |
| u8 operation_byte = *(data + index); |
| index++; |
| |
| if (operation_byte == MIPI_SEQ_ELEM_END) { |
| if (index != seq_end) { |
| DRM_ERROR("Invalid element structure\n"); |
| return 0; |
| } |
| return index; |
| } |
| |
| len = *(data + index); |
| index++; |
| |
| /* |
| * FIXME: Would be nice to check elements like for v1/v2 in |
| * goto_next_sequence() above. |
| */ |
| switch (operation_byte) { |
| case MIPI_SEQ_ELEM_SEND_PKT: |
| case MIPI_SEQ_ELEM_DELAY: |
| case MIPI_SEQ_ELEM_GPIO: |
| case MIPI_SEQ_ELEM_I2C: |
| case MIPI_SEQ_ELEM_SPI: |
| case MIPI_SEQ_ELEM_PMIC: |
| break; |
| default: |
| DRM_ERROR("Unknown operation byte %u\n", |
| operation_byte); |
| break; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static void |
| parse_mipi_sequence(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| const struct bdb_mipi_sequence *sequence; |
| const u8 *seq_data; |
| u32 seq_size; |
| u8 *data; |
| int index = 0; |
| |
| /* Only our generic panel driver uses the sequence block. */ |
| if (dev_priv->vbt.dsi.panel_id != MIPI_DSI_GENERIC_PANEL_ID) |
| return; |
| |
| sequence = find_section(bdb, BDB_MIPI_SEQUENCE); |
| if (!sequence) { |
| DRM_DEBUG_KMS("No MIPI Sequence found, parsing complete\n"); |
| return; |
| } |
| |
| /* Fail gracefully for forward incompatible sequence block. */ |
| if (sequence->version >= 4) { |
| DRM_ERROR("Unable to parse MIPI Sequence Block v%u\n", |
| sequence->version); |
| return; |
| } |
| |
| DRM_DEBUG_DRIVER("Found MIPI sequence block v%u\n", sequence->version); |
| |
| seq_data = find_panel_sequence_block(sequence, panel_type, &seq_size); |
| if (!seq_data) |
| return; |
| |
| data = kmemdup(seq_data, seq_size, GFP_KERNEL); |
| if (!data) |
| return; |
| |
| /* Parse the sequences, store pointers to each sequence. */ |
| for (;;) { |
| u8 seq_id = *(data + index); |
| if (seq_id == MIPI_SEQ_END) |
| break; |
| |
| if (seq_id >= MIPI_SEQ_MAX) { |
| DRM_ERROR("Unknown sequence %u\n", seq_id); |
| goto err; |
| } |
| |
| dev_priv->vbt.dsi.sequence[seq_id] = data + index; |
| |
| if (sequence->version >= 3) |
| index = goto_next_sequence_v3(data, index, seq_size); |
| else |
| index = goto_next_sequence(data, index, seq_size); |
| if (!index) { |
| DRM_ERROR("Invalid sequence %u\n", seq_id); |
| goto err; |
| } |
| } |
| |
| dev_priv->vbt.dsi.data = data; |
| dev_priv->vbt.dsi.size = seq_size; |
| dev_priv->vbt.dsi.seq_version = sequence->version; |
| |
| DRM_DEBUG_DRIVER("MIPI related VBT parsing complete\n"); |
| return; |
| |
| err: |
| kfree(data); |
| memset(dev_priv->vbt.dsi.sequence, 0, sizeof(dev_priv->vbt.dsi.sequence)); |
| } |
| |
| static u8 translate_iboost(u8 val) |
| { |
| static const u8 mapping[] = { 1, 3, 7 }; /* See VBT spec */ |
| |
| if (val >= ARRAY_SIZE(mapping)) { |
| DRM_DEBUG_KMS("Unsupported I_boost value found in VBT (%d), display may not work properly\n", val); |
| return 0; |
| } |
| return mapping[val]; |
| } |
| |
| static void parse_ddi_port(struct drm_i915_private *dev_priv, enum port port, |
| const struct bdb_header *bdb) |
| { |
| union child_device_config *it, *child = NULL; |
| struct ddi_vbt_port_info *info = &dev_priv->vbt.ddi_port_info[port]; |
| uint8_t hdmi_level_shift; |
| int i, j; |
| bool is_dvi, is_hdmi, is_dp, is_edp, is_crt; |
| uint8_t aux_channel, ddc_pin; |
| /* Each DDI port can have more than one value on the "DVO Port" field, |
| * so look for all the possible values for each port and abort if more |
| * than one is found. */ |
| int dvo_ports[][3] = { |
| {DVO_PORT_HDMIA, DVO_PORT_DPA, -1}, |
| {DVO_PORT_HDMIB, DVO_PORT_DPB, -1}, |
| {DVO_PORT_HDMIC, DVO_PORT_DPC, -1}, |
| {DVO_PORT_HDMID, DVO_PORT_DPD, -1}, |
| {DVO_PORT_CRT, DVO_PORT_HDMIE, DVO_PORT_DPE}, |
| }; |
| |
| /* Find the child device to use, abort if more than one found. */ |
| for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { |
| it = dev_priv->vbt.child_dev + i; |
| |
| for (j = 0; j < 3; j++) { |
| if (dvo_ports[port][j] == -1) |
| break; |
| |
| if (it->common.dvo_port == dvo_ports[port][j]) { |
| if (child) { |
| DRM_DEBUG_KMS("More than one child device for port %c in VBT.\n", |
| port_name(port)); |
| return; |
| } |
| child = it; |
| } |
| } |
| } |
| if (!child) |
| return; |
| |
| aux_channel = child->raw[25]; |
| ddc_pin = child->common.ddc_pin; |
| |
| is_dvi = child->common.device_type & DEVICE_TYPE_TMDS_DVI_SIGNALING; |
| is_dp = child->common.device_type & DEVICE_TYPE_DISPLAYPORT_OUTPUT; |
| is_crt = child->common.device_type & DEVICE_TYPE_ANALOG_OUTPUT; |
| is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0; |
| is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR); |
| |
| info->supports_dvi = is_dvi; |
| info->supports_hdmi = is_hdmi; |
| info->supports_dp = is_dp; |
| |
| DRM_DEBUG_KMS("Port %c VBT info: DP:%d HDMI:%d DVI:%d EDP:%d CRT:%d\n", |
| port_name(port), is_dp, is_hdmi, is_dvi, is_edp, is_crt); |
| |
| if (is_edp && is_dvi) |
| DRM_DEBUG_KMS("Internal DP port %c is TMDS compatible\n", |
| port_name(port)); |
| if (is_crt && port != PORT_E) |
| DRM_DEBUG_KMS("Port %c is analog\n", port_name(port)); |
| if (is_crt && (is_dvi || is_dp)) |
| DRM_DEBUG_KMS("Analog port %c is also DP or TMDS compatible\n", |
| port_name(port)); |
| if (is_dvi && (port == PORT_A || port == PORT_E)) |
| DRM_DEBUG_KMS("Port %c is TMDS compatible\n", port_name(port)); |
| if (!is_dvi && !is_dp && !is_crt) |
| DRM_DEBUG_KMS("Port %c is not DP/TMDS/CRT compatible\n", |
| port_name(port)); |
| if (is_edp && (port == PORT_B || port == PORT_C || port == PORT_E)) |
| DRM_DEBUG_KMS("Port %c is internal DP\n", port_name(port)); |
| |
| if (is_dvi) { |
| if (port == PORT_E) { |
| info->alternate_ddc_pin = ddc_pin; |
| /* if DDIE share ddc pin with other port, then |
| * dvi/hdmi couldn't exist on the shared port. |
| * Otherwise they share the same ddc bin and system |
| * couldn't communicate with them seperately. */ |
| if (ddc_pin == DDC_PIN_B) { |
| dev_priv->vbt.ddi_port_info[PORT_B].supports_dvi = 0; |
| dev_priv->vbt.ddi_port_info[PORT_B].supports_hdmi = 0; |
| } else if (ddc_pin == DDC_PIN_C) { |
| dev_priv->vbt.ddi_port_info[PORT_C].supports_dvi = 0; |
| dev_priv->vbt.ddi_port_info[PORT_C].supports_hdmi = 0; |
| } else if (ddc_pin == DDC_PIN_D) { |
| dev_priv->vbt.ddi_port_info[PORT_D].supports_dvi = 0; |
| dev_priv->vbt.ddi_port_info[PORT_D].supports_hdmi = 0; |
| } |
| } else if (ddc_pin == DDC_PIN_B && port != PORT_B) |
| DRM_DEBUG_KMS("Unexpected DDC pin for port B\n"); |
| else if (ddc_pin == DDC_PIN_C && port != PORT_C) |
| DRM_DEBUG_KMS("Unexpected DDC pin for port C\n"); |
| else if (ddc_pin == DDC_PIN_D && port != PORT_D) |
| DRM_DEBUG_KMS("Unexpected DDC pin for port D\n"); |
| } |
| |
| if (is_dp) { |
| if (port == PORT_E) { |
| info->alternate_aux_channel = aux_channel; |
| /* if DDIE share aux channel with other port, then |
| * DP couldn't exist on the shared port. Otherwise |
| * they share the same aux channel and system |
| * couldn't communicate with them seperately. */ |
| if (aux_channel == DP_AUX_A) |
| dev_priv->vbt.ddi_port_info[PORT_A].supports_dp = 0; |
| else if (aux_channel == DP_AUX_B) |
| dev_priv->vbt.ddi_port_info[PORT_B].supports_dp = 0; |
| else if (aux_channel == DP_AUX_C) |
| dev_priv->vbt.ddi_port_info[PORT_C].supports_dp = 0; |
| else if (aux_channel == DP_AUX_D) |
| dev_priv->vbt.ddi_port_info[PORT_D].supports_dp = 0; |
| } |
| else if (aux_channel == DP_AUX_A && port != PORT_A) |
| DRM_DEBUG_KMS("Unexpected AUX channel for port A\n"); |
| else if (aux_channel == DP_AUX_B && port != PORT_B) |
| DRM_DEBUG_KMS("Unexpected AUX channel for port B\n"); |
| else if (aux_channel == DP_AUX_C && port != PORT_C) |
| DRM_DEBUG_KMS("Unexpected AUX channel for port C\n"); |
| else if (aux_channel == DP_AUX_D && port != PORT_D) |
| DRM_DEBUG_KMS("Unexpected AUX channel for port D\n"); |
| } |
| |
| if (bdb->version >= 158) { |
| /* The VBT HDMI level shift values match the table we have. */ |
| hdmi_level_shift = child->raw[7] & 0xF; |
| DRM_DEBUG_KMS("VBT HDMI level shift for port %c: %d\n", |
| port_name(port), |
| hdmi_level_shift); |
| info->hdmi_level_shift = hdmi_level_shift; |
| } |
| |
| /* Parse the I_boost config for SKL and above */ |
| if (bdb->version >= 196 && (child->common.flags_1 & IBOOST_ENABLE)) { |
| info->dp_boost_level = translate_iboost(child->common.iboost_level & 0xF); |
| DRM_DEBUG_KMS("VBT (e)DP boost level for port %c: %d\n", |
| port_name(port), info->dp_boost_level); |
| info->hdmi_boost_level = translate_iboost(child->common.iboost_level >> 4); |
| DRM_DEBUG_KMS("VBT HDMI boost level for port %c: %d\n", |
| port_name(port), info->hdmi_boost_level); |
| } |
| } |
| |
| static void parse_ddi_ports(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| enum port port; |
| |
| if (!HAS_DDI(dev_priv)) |
| return; |
| |
| if (!dev_priv->vbt.child_dev_num) |
| return; |
| |
| if (bdb->version < 155) |
| return; |
| |
| for (port = PORT_A; port < I915_MAX_PORTS; port++) |
| parse_ddi_port(dev_priv, port, bdb); |
| } |
| |
| static void |
| parse_device_mapping(struct drm_i915_private *dev_priv, |
| const struct bdb_header *bdb) |
| { |
| const struct bdb_general_definitions *p_defs; |
| const union child_device_config *p_child; |
| union child_device_config *child_dev_ptr; |
| int i, child_device_num, count; |
| u8 expected_size; |
| u16 block_size; |
| |
| p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS); |
| if (!p_defs) { |
| DRM_DEBUG_KMS("No general definition block is found, no devices defined.\n"); |
| return; |
| } |
| if (bdb->version < 106) { |
| expected_size = 22; |
| } else if (bdb->version < 109) { |
| expected_size = 27; |
| } else if (bdb->version < 195) { |
| BUILD_BUG_ON(sizeof(struct old_child_dev_config) != 33); |
| expected_size = sizeof(struct old_child_dev_config); |
| } else if (bdb->version == 195) { |
| expected_size = 37; |
| } else if (bdb->version <= 197) { |
| expected_size = 38; |
| } else { |
| expected_size = 38; |
| BUILD_BUG_ON(sizeof(*p_child) < 38); |
| DRM_DEBUG_DRIVER("Expected child device config size for VBT version %u not known; assuming %u\n", |
| bdb->version, expected_size); |
| } |
| |
| /* Flag an error for unexpected size, but continue anyway. */ |
| if (p_defs->child_dev_size != expected_size) |
| DRM_ERROR("Unexpected child device config size %u (expected %u for VBT version %u)\n", |
| p_defs->child_dev_size, expected_size, bdb->version); |
| |
| /* The legacy sized child device config is the minimum we need. */ |
| if (p_defs->child_dev_size < sizeof(struct old_child_dev_config)) { |
| DRM_DEBUG_KMS("Child device config size %u is too small.\n", |
| p_defs->child_dev_size); |
| 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)) / |
| p_defs->child_dev_size; |
| count = 0; |
| /* get the number of child device that is present */ |
| for (i = 0; i < child_device_num; i++) { |
| p_child = child_device_ptr(p_defs, i); |
| if (!p_child->common.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->vbt.child_dev = kcalloc(count, sizeof(*p_child), GFP_KERNEL); |
| if (!dev_priv->vbt.child_dev) { |
| DRM_DEBUG_KMS("No memory space for child device\n"); |
| return; |
| } |
| |
| dev_priv->vbt.child_dev_num = count; |
| count = 0; |
| for (i = 0; i < child_device_num; i++) { |
| p_child = child_device_ptr(p_defs, i); |
| if (!p_child->common.device_type) { |
| /* skip the device block if device type is invalid */ |
| continue; |
| } |
| |
| if (p_child->common.dvo_port >= DVO_PORT_MIPIA |
| && p_child->common.dvo_port <= DVO_PORT_MIPID |
| &&p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT) { |
| DRM_DEBUG_KMS("Found MIPI as LFP\n"); |
| dev_priv->vbt.has_mipi = 1; |
| dev_priv->vbt.dsi.port = p_child->common.dvo_port; |
| } |
| |
| child_dev_ptr = dev_priv->vbt.child_dev + count; |
| count++; |
| |
| /* |
| * Copy as much as we know (sizeof) and is available |
| * (child_dev_size) of the child device. Accessing the data must |
| * depend on VBT version. |
| */ |
| memcpy(child_dev_ptr, p_child, |
| min_t(size_t, p_defs->child_dev_size, sizeof(*p_child))); |
| } |
| return; |
| } |
| |
| static void |
| init_vbt_defaults(struct drm_i915_private *dev_priv) |
| { |
| enum port port; |
| |
| dev_priv->vbt.crt_ddc_pin = GMBUS_PIN_VGADDC; |
| |
| /* Default to having backlight */ |
| dev_priv->vbt.backlight.present = true; |
| |
| /* LFP panel data */ |
| dev_priv->vbt.lvds_dither = 1; |
| dev_priv->vbt.lvds_vbt = 0; |
| |
| /* SDVO panel data */ |
| dev_priv->vbt.sdvo_lvds_vbt_mode = NULL; |
| |
| /* general features */ |
| dev_priv->vbt.int_tv_support = 1; |
| dev_priv->vbt.int_crt_support = 1; |
| |
| /* Default to using SSC */ |
| dev_priv->vbt.lvds_use_ssc = 1; |
| /* |
| * Core/SandyBridge/IvyBridge use alternative (120MHz) reference |
| * clock for LVDS. |
| */ |
| dev_priv->vbt.lvds_ssc_freq = intel_bios_ssc_frequency(dev_priv, |
| !HAS_PCH_SPLIT(dev_priv)); |
| DRM_DEBUG_KMS("Set default to SSC at %d kHz\n", dev_priv->vbt.lvds_ssc_freq); |
| |
| for (port = PORT_A; port < I915_MAX_PORTS; port++) { |
| struct ddi_vbt_port_info *info = |
| &dev_priv->vbt.ddi_port_info[port]; |
| |
| info->hdmi_level_shift = HDMI_LEVEL_SHIFT_UNKNOWN; |
| |
| info->supports_dvi = (port != PORT_A && port != PORT_E); |
| info->supports_hdmi = info->supports_dvi; |
| info->supports_dp = (port != PORT_E); |
| } |
| } |
| |
| static const struct bdb_header *get_bdb_header(const struct vbt_header *vbt) |
| { |
| const void *_vbt = vbt; |
| |
| return _vbt + vbt->bdb_offset; |
| } |
| |
| /** |
| * intel_bios_is_valid_vbt - does the given buffer contain a valid VBT |
| * @buf: pointer to a buffer to validate |
| * @size: size of the buffer |
| * |
| * Returns true on valid VBT. |
| */ |
| bool intel_bios_is_valid_vbt(const void *buf, size_t size) |
| { |
| const struct vbt_header *vbt = buf; |
| const struct bdb_header *bdb; |
| |
| if (!vbt) |
| return false; |
| |
| if (sizeof(struct vbt_header) > size) { |
| DRM_DEBUG_DRIVER("VBT header incomplete\n"); |
| return false; |
| } |
| |
| if (memcmp(vbt->signature, "$VBT", 4)) { |
| DRM_DEBUG_DRIVER("VBT invalid signature\n"); |
| return false; |
| } |
| |
| if (vbt->bdb_offset + sizeof(struct bdb_header) > size) { |
| DRM_DEBUG_DRIVER("BDB header incomplete\n"); |
| return false; |
| } |
| |
| bdb = get_bdb_header(vbt); |
| if (vbt->bdb_offset + bdb->bdb_size > size) { |
| DRM_DEBUG_DRIVER("BDB incomplete\n"); |
| return false; |
| } |
| |
| return vbt; |
| } |
| |
| static const struct vbt_header *find_vbt(void __iomem *bios, size_t size) |
| { |
| size_t i; |
| |
| /* Scour memory looking for the VBT signature. */ |
| for (i = 0; i + 4 < size; i++) { |
| void *vbt; |
| |
| if (ioread32(bios + i) != *((const u32 *) "$VBT")) |
| continue; |
| |
| /* |
| * This is the one place where we explicitly discard the address |
| * space (__iomem) of the BIOS/VBT. |
| */ |
| vbt = (void __force *) bios + i; |
| if (intel_bios_is_valid_vbt(vbt, size - i)) |
| return vbt; |
| |
| break; |
| } |
| |
| return NULL; |
| } |
| |
| /** |
| * intel_bios_init - find VBT and initialize settings from the BIOS |
| * @dev_priv: i915 device instance |
| * |
| * Loads the Video BIOS and checks that the VBT exists. Sets scratch registers |
| * to appropriate values. |
| * |
| * Returns 0 on success, nonzero on failure. |
| */ |
| int |
| intel_bios_init(struct drm_i915_private *dev_priv) |
| { |
| struct pci_dev *pdev = dev_priv->dev->pdev; |
| const struct vbt_header *vbt = dev_priv->opregion.vbt; |
| const struct bdb_header *bdb; |
| u8 __iomem *bios = NULL; |
| |
| if (HAS_PCH_NOP(dev_priv)) |
| return -ENODEV; |
| |
| init_vbt_defaults(dev_priv); |
| |
| if (!vbt) { |
| size_t size; |
| |
| bios = pci_map_rom(pdev, &size); |
| if (!bios) |
| return -1; |
| |
| vbt = find_vbt(bios, size); |
| if (!vbt) { |
| pci_unmap_rom(pdev, bios); |
| return -1; |
| } |
| |
| DRM_DEBUG_KMS("Found valid VBT in PCI ROM\n"); |
| } |
| |
| bdb = get_bdb_header(vbt); |
| |
| DRM_DEBUG_KMS("VBT signature \"%.*s\", BDB version %d\n", |
| (int)sizeof(vbt->signature), vbt->signature, bdb->version); |
| |
| /* Grab useful general definitions */ |
| parse_general_features(dev_priv, bdb); |
| parse_general_definitions(dev_priv, bdb); |
| parse_lfp_panel_data(dev_priv, bdb); |
| parse_lfp_backlight(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); |
| parse_psr(dev_priv, bdb); |
| parse_mipi_config(dev_priv, bdb); |
| parse_mipi_sequence(dev_priv, bdb); |
| parse_ddi_ports(dev_priv, bdb); |
| |
| if (bios) |
| pci_unmap_rom(pdev, bios); |
| |
| return 0; |
| } |