diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_bios.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_bios.c | 1887 |
1 files changed, 0 insertions, 1887 deletions
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c deleted file mode 100644 index 639d45c1dd2e..000000000000 --- a/drivers/gpu/drm/i915/intel_bios.c +++ /dev/null @@ -1,1887 +0,0 @@ -/* - * 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" - -#define _INTEL_BIOS_PRIVATE -#include "intel_vbt_defs.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 - -/* 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_hi << 8) | - dvo_timing->hsync_pulse_width_lo); - 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_hi << 4) | dvo_timing->vsync_off_lo); - panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start + - ((dvo_timing->vsync_pulse_width_hi << 4) | - dvo_timing->vsync_pulse_width_lo); - 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; - - panel_fixed_mode->width_mm = (dvo_timing->himage_hi << 8) | - dvo_timing->himage_lo; - panel_fixed_mode->height_mm = (dvo_timing->vimage_hi << 8) | - dvo_timing->vimage_lo; - - /* 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 panel_type; - int drrs_mode; - int ret; - - lvds_options = find_section(bdb, BDB_LVDS_OPTIONS); - if (!lvds_options) - return; - - dev_priv->vbt.lvds_dither = lvds_options->pixel_dither; - - ret = intel_opregion_get_panel_type(dev_priv); - if (ret >= 0) { - WARN_ON(ret > 0xf); - panel_type = ret; - DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type); - } else { - if (lvds_options->panel_type > 0xf) { - DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n", - lvds_options->panel_type); - return; - } - panel_type = lvds_options->panel_type; - DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type); - } - - dev_priv->vbt.panel_type = 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, - 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, - 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; - int panel_type = dev_priv->vbt.panel_type; - - 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.type = INTEL_BACKLIGHT_DISPLAY_DDI; - if (bdb->version >= 191 && - get_blocksize(backlight_data) >= sizeof(*backlight_data)) { - const struct bdb_lfp_backlight_control_method *method; - - method = &backlight_data->backlight_control[panel_type]; - dev_priv->vbt.backlight.type = method->type; - dev_priv->vbt.backlight.controller = method->controller; - } - - 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, controller %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], - dev_priv->vbt.backlight.controller); -} - -/* 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->vbt.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; - - 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; - int panel_type = dev_priv->vbt.panel_type; - - 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->vbt.edp.low_vswing = i915.edp_vswing == 1; - } else { - vswing = (edp->edp_vswing_preemph >> (panel_type * 4)) & 0xF; - dev_priv->vbt.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; - int panel_type = dev_priv->vbt.panel_type; - - 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; - int panel_type = dev_priv->vbt.panel_type; - - /* parse MIPI blocks only if LFP type is MIPI */ - if (!intel_bios_is_dsi_present(dev_priv, NULL)) - 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; - } - - /* - * These fields are introduced from the VBT version 197 onwards, - * so making sure that these bits are set zero in the previous - * versions. - */ - if (dev_priv->vbt.dsi.config->dual_link && bdb->version < 197) { - dev_priv->vbt.dsi.config->dl_dcs_cabc_ports = 0; - dev_priv->vbt.dsi.config->dl_dcs_backlight_ports = 0; - } - - /* 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) -{ - int panel_type = dev_priv->vbt.panel_type; - 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; - } - - /* Log about presence of sequences we won't run. */ - if (seq_id == MIPI_SEQ_TEAR_ON || seq_id == MIPI_SEQ_TEAR_OFF) - DRM_DEBUG_KMS("Unsupported sequence %u\n", seq_id); - - 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 sanitize_ddc_pin(struct drm_i915_private *dev_priv, - enum port port) -{ - const struct ddi_vbt_port_info *info = - &dev_priv->vbt.ddi_port_info[port]; - enum port p; - - if (!info->alternate_ddc_pin) - return; - - for_each_port_masked(p, (1 << port) - 1) { - struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p]; - - if (info->alternate_ddc_pin != i->alternate_ddc_pin) - continue; - - DRM_DEBUG_KMS("port %c trying to use the same DDC pin (0x%x) as port %c, " - "disabling port %c DVI/HDMI support\n", - port_name(p), i->alternate_ddc_pin, - port_name(port), port_name(p)); - - /* - * If we have multiple ports supposedly sharing the - * pin, then dvi/hdmi couldn't exist on the shared - * port. Otherwise they share the same ddc bin and - * system couldn't communicate with them separately. - * - * Due to parsing the ports in alphabetical order, - * a higher port will always clobber a lower one. - */ - i->supports_dvi = false; - i->supports_hdmi = false; - i->alternate_ddc_pin = 0; - } -} - -static void sanitize_aux_ch(struct drm_i915_private *dev_priv, - enum port port) -{ - const struct ddi_vbt_port_info *info = - &dev_priv->vbt.ddi_port_info[port]; - enum port p; - - if (!info->alternate_aux_channel) - return; - - for_each_port_masked(p, (1 << port) - 1) { - struct ddi_vbt_port_info *i = &dev_priv->vbt.ddi_port_info[p]; - - if (info->alternate_aux_channel != i->alternate_aux_channel) - continue; - - DRM_DEBUG_KMS("port %c trying to use the same AUX CH (0x%x) as port %c, " - "disabling port %c DP support\n", - port_name(p), i->alternate_aux_channel, - port_name(port), port_name(p)); - - /* - * If we have multiple ports supposedlt sharing the - * aux channel, then DP couldn't exist on the shared - * port. Otherwise they share the same aux channel - * and system couldn't communicate with them separately. - * - * Due to parsing the ports in alphabetical order, - * a higher port will always clobber a lower one. - */ - i->supports_dp = false; - i->alternate_aux_channel = 0; - } -} - -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->common.aux_channel; - 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; - info->supports_edp = is_edp; - - 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) { - info->alternate_ddc_pin = ddc_pin; - - sanitize_ddc_pin(dev_priv, port); - } - - if (is_dp) { - info->alternate_aux_channel = aux_channel; - - sanitize_aux_ch(dev_priv, port); - } - - 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.iboost) { - 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 < 111) { - 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; - } - - 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))); - - /* - * copied full block, now init values when they are not - * available in current version - */ - if (bdb->version < 196) { - /* Set default values for bits added from v196 */ - child_dev_ptr->common.iboost = 0; - child_dev_ptr->common.hpd_invert = 0; - } - - if (bdb->version < 192) - child_dev_ptr->common.lspcon = 0; - } - return; -} - -/* Common defaults which may be overridden by VBT. */ -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; - } -} - -/* Defaults to initialize only if there is no VBT. */ -static void -init_vbt_missing_defaults(struct drm_i915_private *dev_priv) -{ - enum port port; - - for (port = PORT_A; port < I915_MAX_PORTS; port++) { - struct ddi_vbt_port_info *info = - &dev_priv->vbt.ddi_port_info[port]; - - 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 (range_overflows_t(size_t, - vbt->bdb_offset, - sizeof(struct bdb_header), - size)) { - DRM_DEBUG_DRIVER("BDB header incomplete\n"); - return false; - } - - bdb = get_bdb_header(vbt); - if (range_overflows_t(size_t, 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 - * - * Parse and initialize settings from the Video BIOS Tables (VBT). If the VBT - * was not found in ACPI OpRegion, try to find it in PCI ROM first. Also - * initialize some defaults if the VBT is not present at all. - */ -void intel_bios_init(struct drm_i915_private *dev_priv) -{ - struct pci_dev *pdev = dev_priv->drm.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)) { - DRM_DEBUG_KMS("Skipping VBT init due to disabled display.\n"); - return; - } - - init_vbt_defaults(dev_priv); - - /* If the OpRegion does not have VBT, look in PCI ROM. */ - if (!vbt) { - size_t size; - - bios = pci_map_rom(pdev, &size); - if (!bios) - goto out; - - vbt = find_vbt(bios, size); - if (!vbt) - goto out; - - 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); - -out: - if (!vbt) { - DRM_INFO("Failed to find VBIOS tables (VBT)\n"); - init_vbt_missing_defaults(dev_priv); - } - - if (bios) - pci_unmap_rom(pdev, bios); -} - -/** - * intel_bios_is_tv_present - is integrated TV present in VBT - * @dev_priv: i915 device instance - * - * Return true if TV is present. If no child devices were parsed from VBT, - * assume TV is present. - */ -bool intel_bios_is_tv_present(struct drm_i915_private *dev_priv) -{ - union child_device_config *p_child; - int i; - - if (!dev_priv->vbt.int_tv_support) - return false; - - if (!dev_priv->vbt.child_dev_num) - return true; - - for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { - p_child = dev_priv->vbt.child_dev + i; - /* - * If the device type is not TV, continue. - */ - switch (p_child->old.device_type) { - case DEVICE_TYPE_INT_TV: - case DEVICE_TYPE_TV: - case DEVICE_TYPE_TV_SVIDEO_COMPOSITE: - break; - default: - continue; - } - /* Only when the addin_offset is non-zero, it is regarded - * as present. - */ - if (p_child->old.addin_offset) - return true; - } - - return false; -} - -/** - * intel_bios_is_lvds_present - is LVDS present in VBT - * @dev_priv: i915 device instance - * @i2c_pin: i2c pin for LVDS if present - * - * Return true if LVDS is present. If no child devices were parsed from VBT, - * assume LVDS is present. - */ -bool intel_bios_is_lvds_present(struct drm_i915_private *dev_priv, u8 *i2c_pin) -{ - int i; - - if (!dev_priv->vbt.child_dev_num) - return true; - - for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { - union child_device_config *uchild = dev_priv->vbt.child_dev + i; - struct old_child_dev_config *child = &uchild->old; - - /* If the device type is not LFP, continue. - * We have to check both the new identifiers as well as the - * old for compatibility with some BIOSes. - */ - if (child->device_type != DEVICE_TYPE_INT_LFP && - child->device_type != DEVICE_TYPE_LFP) - continue; - - if (intel_gmbus_is_valid_pin(dev_priv, child->i2c_pin)) - *i2c_pin = child->i2c_pin; - - /* However, we cannot trust the BIOS writers to populate - * the VBT correctly. Since LVDS requires additional - * information from AIM blocks, a non-zero addin offset is - * a good indicator that the LVDS is actually present. - */ - if (child->addin_offset) - return true; - - /* But even then some BIOS writers perform some black magic - * and instantiate the device without reference to any - * additional data. Trust that if the VBT was written into - * the OpRegion then they have validated the LVDS's existence. - */ - if (dev_priv->opregion.vbt) - return true; - } - - return false; -} - -/** - * intel_bios_is_port_present - is the specified digital port present - * @dev_priv: i915 device instance - * @port: port to check - * - * Return true if the device in %port is present. - */ -bool intel_bios_is_port_present(struct drm_i915_private *dev_priv, enum port port) -{ - static const struct { - u16 dp, hdmi; - } port_mapping[] = { - [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, }, - [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, }, - [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, }, - [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, }, - }; - int i; - - /* FIXME maybe deal with port A as well? */ - if (WARN_ON(port == PORT_A) || port >= ARRAY_SIZE(port_mapping)) - return false; - - if (!dev_priv->vbt.child_dev_num) - return false; - - for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { - const union child_device_config *p_child = - &dev_priv->vbt.child_dev[i]; - if ((p_child->common.dvo_port == port_mapping[port].dp || - p_child->common.dvo_port == port_mapping[port].hdmi) && - (p_child->common.device_type & (DEVICE_TYPE_TMDS_DVI_SIGNALING | - DEVICE_TYPE_DISPLAYPORT_OUTPUT))) - return true; - } - - return false; -} - -/** - * intel_bios_is_port_edp - is the device in given port eDP - * @dev_priv: i915 device instance - * @port: port to check - * - * Return true if the device in %port is eDP. - */ -bool intel_bios_is_port_edp(struct drm_i915_private *dev_priv, enum port port) -{ - union child_device_config *p_child; - static const short port_mapping[] = { - [PORT_B] = DVO_PORT_DPB, - [PORT_C] = DVO_PORT_DPC, - [PORT_D] = DVO_PORT_DPD, - [PORT_E] = DVO_PORT_DPE, - }; - int i; - - if (HAS_DDI(dev_priv)) - return dev_priv->vbt.ddi_port_info[port].supports_edp; - - if (!dev_priv->vbt.child_dev_num) - return false; - - for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { - p_child = dev_priv->vbt.child_dev + i; - - if (p_child->common.dvo_port == port_mapping[port] && - (p_child->common.device_type & DEVICE_TYPE_eDP_BITS) == - (DEVICE_TYPE_eDP & DEVICE_TYPE_eDP_BITS)) - return true; - } - - return false; -} - -static bool child_dev_is_dp_dual_mode(const union child_device_config *p_child, - enum port port) -{ - static const struct { - u16 dp, hdmi; - } port_mapping[] = { - /* - * Buggy VBTs may declare DP ports as having - * HDMI type dvo_port :( So let's check both. - */ - [PORT_B] = { DVO_PORT_DPB, DVO_PORT_HDMIB, }, - [PORT_C] = { DVO_PORT_DPC, DVO_PORT_HDMIC, }, - [PORT_D] = { DVO_PORT_DPD, DVO_PORT_HDMID, }, - [PORT_E] = { DVO_PORT_DPE, DVO_PORT_HDMIE, }, - }; - - if (port == PORT_A || port >= ARRAY_SIZE(port_mapping)) - return false; - - if ((p_child->common.device_type & DEVICE_TYPE_DP_DUAL_MODE_BITS) != - (DEVICE_TYPE_DP_DUAL_MODE & DEVICE_TYPE_DP_DUAL_MODE_BITS)) - return false; - - if (p_child->common.dvo_port == port_mapping[port].dp) - return true; - - /* Only accept a HDMI dvo_port as DP++ if it has an AUX channel */ - if (p_child->common.dvo_port == port_mapping[port].hdmi && - p_child->common.aux_channel != 0) - return true; - - return false; -} - -bool intel_bios_is_port_dp_dual_mode(struct drm_i915_private *dev_priv, - enum port port) -{ - int i; - - for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { - const union child_device_config *p_child = - &dev_priv->vbt.child_dev[i]; - - if (child_dev_is_dp_dual_mode(p_child, port)) - return true; - } - - return false; -} - -/** - * intel_bios_is_dsi_present - is DSI present in VBT - * @dev_priv: i915 device instance - * @port: port for DSI if present - * - * Return true if DSI is present, and return the port in %port. - */ -bool intel_bios_is_dsi_present(struct drm_i915_private *dev_priv, - enum port *port) -{ - union child_device_config *p_child; - u8 dvo_port; - int i; - - for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { - p_child = dev_priv->vbt.child_dev + i; - - if (!(p_child->common.device_type & DEVICE_TYPE_MIPI_OUTPUT)) - continue; - - dvo_port = p_child->common.dvo_port; - - switch (dvo_port) { - case DVO_PORT_MIPIA: - case DVO_PORT_MIPIC: - if (port) - *port = dvo_port - DVO_PORT_MIPIA; - return true; - case DVO_PORT_MIPIB: - case DVO_PORT_MIPID: - DRM_DEBUG_KMS("VBT has unsupported DSI port %c\n", - port_name(dvo_port - DVO_PORT_MIPIA)); - break; - } - } - - return false; -} - -/** - * intel_bios_is_port_hpd_inverted - is HPD inverted for %port - * @dev_priv: i915 device instance - * @port: port to check - * - * Return true if HPD should be inverted for %port. - */ -bool -intel_bios_is_port_hpd_inverted(struct drm_i915_private *dev_priv, - enum port port) -{ - int i; - - if (WARN_ON_ONCE(!IS_GEN9_LP(dev_priv))) - return false; - - for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { - if (!dev_priv->vbt.child_dev[i].common.hpd_invert) - continue; - - switch (dev_priv->vbt.child_dev[i].common.dvo_port) { - case DVO_PORT_DPA: - case DVO_PORT_HDMIA: - if (port == PORT_A) - return true; - break; - case DVO_PORT_DPB: - case DVO_PORT_HDMIB: - if (port == PORT_B) - return true; - break; - case DVO_PORT_DPC: - case DVO_PORT_HDMIC: - if (port == PORT_C) - return true; - break; - default: - break; - } - } - - return false; -} - -/** - * intel_bios_is_lspcon_present - if LSPCON is attached on %port - * @dev_priv: i915 device instance - * @port: port to check - * - * Return true if LSPCON is present on this port - */ -bool -intel_bios_is_lspcon_present(struct drm_i915_private *dev_priv, - enum port port) -{ - int i; - - if (!HAS_LSPCON(dev_priv)) - return false; - - for (i = 0; i < dev_priv->vbt.child_dev_num; i++) { - if (!dev_priv->vbt.child_dev[i].common.lspcon) - continue; - - switch (dev_priv->vbt.child_dev[i].common.dvo_port) { - case DVO_PORT_DPA: - case DVO_PORT_HDMIA: - if (port == PORT_A) - return true; - break; - case DVO_PORT_DPB: - case DVO_PORT_HDMIB: - if (port == PORT_B) - return true; - break; - case DVO_PORT_DPC: - case DVO_PORT_HDMIC: - if (port == PORT_C) - return true; - break; - case DVO_PORT_DPD: - case DVO_PORT_HDMID: - if (port == PORT_D) - return true; - break; - default: - break; - } - } - - return false; -} |