334 строки
9.6 KiB
C
334 строки
9.6 KiB
C
/*
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* Copyright © 2006 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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*
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*/
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#include "drmP.h"
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#include "drm.h"
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#include "i915_drm.h"
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#include "i915_drv.h"
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#include "intel_bios.h"
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#define SLAVE_ADDR1 0x70
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#define SLAVE_ADDR2 0x72
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static void *
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find_section(struct bdb_header *bdb, int section_id)
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{
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u8 *base = (u8 *)bdb;
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int index = 0;
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u16 total, current_size;
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u8 current_id;
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/* skip to first section */
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index += bdb->header_size;
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total = bdb->bdb_size;
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/* walk the sections looking for section_id */
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while (index < total) {
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current_id = *(base + index);
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index++;
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current_size = *((u16 *)(base + index));
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index += 2;
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if (current_id == section_id)
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return base + index;
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index += current_size;
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}
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return NULL;
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}
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static void
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fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
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struct lvds_dvo_timing *dvo_timing)
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{
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panel_fixed_mode->hdisplay = (dvo_timing->hactive_hi << 8) |
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dvo_timing->hactive_lo;
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panel_fixed_mode->hsync_start = panel_fixed_mode->hdisplay +
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((dvo_timing->hsync_off_hi << 8) | dvo_timing->hsync_off_lo);
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panel_fixed_mode->hsync_end = panel_fixed_mode->hsync_start +
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dvo_timing->hsync_pulse_width;
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panel_fixed_mode->htotal = panel_fixed_mode->hdisplay +
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((dvo_timing->hblank_hi << 8) | dvo_timing->hblank_lo);
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panel_fixed_mode->vdisplay = (dvo_timing->vactive_hi << 8) |
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dvo_timing->vactive_lo;
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panel_fixed_mode->vsync_start = panel_fixed_mode->vdisplay +
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dvo_timing->vsync_off;
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panel_fixed_mode->vsync_end = panel_fixed_mode->vsync_start +
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dvo_timing->vsync_pulse_width;
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panel_fixed_mode->vtotal = panel_fixed_mode->vdisplay +
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((dvo_timing->vblank_hi << 8) | dvo_timing->vblank_lo);
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panel_fixed_mode->clock = dvo_timing->clock * 10;
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panel_fixed_mode->type = DRM_MODE_TYPE_PREFERRED;
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/* Some VBTs have bogus h/vtotal values */
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if (panel_fixed_mode->hsync_end > panel_fixed_mode->htotal)
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panel_fixed_mode->htotal = panel_fixed_mode->hsync_end + 1;
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if (panel_fixed_mode->vsync_end > panel_fixed_mode->vtotal)
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panel_fixed_mode->vtotal = panel_fixed_mode->vsync_end + 1;
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drm_mode_set_name(panel_fixed_mode);
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}
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/* Try to find integrated panel data */
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static void
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parse_lfp_panel_data(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct bdb_lvds_options *lvds_options;
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struct bdb_lvds_lfp_data *lvds_lfp_data;
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struct bdb_lvds_lfp_data_entry *entry;
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struct lvds_dvo_timing *dvo_timing;
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struct drm_display_mode *panel_fixed_mode;
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/* Defaults if we can't find VBT info */
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dev_priv->lvds_dither = 0;
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dev_priv->lvds_vbt = 0;
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lvds_options = find_section(bdb, BDB_LVDS_OPTIONS);
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if (!lvds_options)
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return;
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dev_priv->lvds_dither = lvds_options->pixel_dither;
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if (lvds_options->panel_type == 0xff)
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return;
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lvds_lfp_data = find_section(bdb, BDB_LVDS_LFP_DATA);
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if (!lvds_lfp_data)
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return;
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dev_priv->lvds_vbt = 1;
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entry = &lvds_lfp_data->data[lvds_options->panel_type];
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dvo_timing = &entry->dvo_timing;
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panel_fixed_mode = drm_calloc(1, sizeof(*panel_fixed_mode),
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DRM_MEM_DRIVER);
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fill_detail_timing_data(panel_fixed_mode, dvo_timing);
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dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
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DRM_DEBUG("Found panel mode in BIOS VBT tables:\n");
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drm_mode_debug_printmodeline(panel_fixed_mode);
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return;
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}
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/* Try to find sdvo panel data */
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static void
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parse_sdvo_panel_data(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct bdb_sdvo_lvds_options *sdvo_lvds_options;
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struct lvds_dvo_timing *dvo_timing;
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struct drm_display_mode *panel_fixed_mode;
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dev_priv->sdvo_lvds_vbt_mode = NULL;
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sdvo_lvds_options = find_section(bdb, BDB_SDVO_LVDS_OPTIONS);
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if (!sdvo_lvds_options)
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return;
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dvo_timing = find_section(bdb, BDB_SDVO_PANEL_DTDS);
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if (!dvo_timing)
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return;
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panel_fixed_mode = drm_calloc(1, sizeof(*panel_fixed_mode),
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DRM_MEM_DRIVER);
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if (!panel_fixed_mode)
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return;
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fill_detail_timing_data(panel_fixed_mode,
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dvo_timing + sdvo_lvds_options->panel_type);
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dev_priv->sdvo_lvds_vbt_mode = panel_fixed_mode;
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return;
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}
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static void
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parse_general_features(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct bdb_general_features *general;
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/* Set sensible defaults in case we can't find the general block */
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dev_priv->int_tv_support = 1;
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dev_priv->int_crt_support = 1;
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general = find_section(bdb, BDB_GENERAL_FEATURES);
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if (general) {
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dev_priv->int_tv_support = general->int_tv_support;
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dev_priv->int_crt_support = general->int_crt_support;
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dev_priv->lvds_use_ssc = general->enable_ssc;
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if (dev_priv->lvds_use_ssc) {
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if (IS_I855(dev_priv->dev))
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dev_priv->lvds_ssc_freq = general->ssc_freq ? 66 : 48;
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else
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dev_priv->lvds_ssc_freq = general->ssc_freq ? 100 : 96;
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}
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}
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}
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static void
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parse_sdvo_device_mapping(struct drm_i915_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct sdvo_device_mapping *p_mapping;
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struct bdb_general_definitions *p_defs;
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struct child_device_config *p_child;
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int i, child_device_num, count;
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u16 block_size, *block_ptr;
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p_defs = find_section(bdb, BDB_GENERAL_DEFINITIONS);
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if (!p_defs) {
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DRM_DEBUG("No general definition block is found\n");
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return;
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}
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/* judge whether the size of child device meets the requirements.
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* If the child device size obtained from general definition block
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* is different with sizeof(struct child_device_config), skip the
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* parsing of sdvo device info
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*/
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if (p_defs->child_dev_size != sizeof(*p_child)) {
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/* different child dev size . Ignore it */
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DRM_DEBUG("different child size is found. Invalid.\n");
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return;
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}
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/* get the block size of general definitions */
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block_ptr = (u16 *)((char *)p_defs - 2);
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block_size = *block_ptr;
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/* get the number of child device */
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child_device_num = (block_size - sizeof(*p_defs)) /
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sizeof(*p_child);
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count = 0;
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for (i = 0; i < child_device_num; i++) {
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p_child = &(p_defs->devices[i]);
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if (!p_child->device_type) {
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/* skip the device block if device type is invalid */
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continue;
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}
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if (p_child->slave_addr != SLAVE_ADDR1 &&
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p_child->slave_addr != SLAVE_ADDR2) {
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/*
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* If the slave address is neither 0x70 nor 0x72,
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* it is not a SDVO device. Skip it.
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*/
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continue;
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}
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if (p_child->dvo_port != DEVICE_PORT_DVOB &&
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p_child->dvo_port != DEVICE_PORT_DVOC) {
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/* skip the incorrect SDVO port */
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DRM_DEBUG("Incorrect SDVO port. Skip it \n");
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continue;
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}
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DRM_DEBUG("the SDVO device with slave addr %2x is found on "
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"%s port\n",
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p_child->slave_addr,
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(p_child->dvo_port == DEVICE_PORT_DVOB) ?
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"SDVOB" : "SDVOC");
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p_mapping = &(dev_priv->sdvo_mappings[p_child->dvo_port - 1]);
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if (!p_mapping->initialized) {
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p_mapping->dvo_port = p_child->dvo_port;
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p_mapping->slave_addr = p_child->slave_addr;
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p_mapping->dvo_wiring = p_child->dvo_wiring;
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p_mapping->initialized = 1;
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} else {
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DRM_DEBUG("Maybe one SDVO port is shared by "
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"two SDVO device.\n");
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}
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if (p_child->slave2_addr) {
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/* Maybe this is a SDVO device with multiple inputs */
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/* And the mapping info is not added */
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DRM_DEBUG("there exists the slave2_addr. Maybe this "
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"is a SDVO device with multiple inputs.\n");
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}
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count++;
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}
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if (!count) {
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/* No SDVO device info is found */
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DRM_DEBUG("No SDVO device info is found in VBT\n");
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}
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return;
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}
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/**
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* intel_init_bios - initialize VBIOS settings & find VBT
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* @dev: DRM device
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*
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* Loads the Video BIOS and checks that the VBT exists. Sets scratch registers
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* to appropriate values.
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*
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* VBT existence is a sanity check that is relied on by other i830_bios.c code.
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* Note that it would be better to use a BIOS call to get the VBT, as BIOSes may
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* feed an updated VBT back through that, compared to what we'll fetch using
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* this method of groping around in the BIOS data.
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*
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* Returns 0 on success, nonzero on failure.
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*/
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bool
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intel_init_bios(struct drm_device *dev)
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{
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struct drm_i915_private *dev_priv = dev->dev_private;
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struct pci_dev *pdev = dev->pdev;
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struct vbt_header *vbt = NULL;
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struct bdb_header *bdb;
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u8 __iomem *bios;
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size_t size;
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int i;
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bios = pci_map_rom(pdev, &size);
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if (!bios)
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return -1;
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/* Scour memory looking for the VBT signature */
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for (i = 0; i + 4 < size; i++) {
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if (!memcmp(bios + i, "$VBT", 4)) {
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vbt = (struct vbt_header *)(bios + i);
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break;
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}
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}
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if (!vbt) {
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DRM_ERROR("VBT signature missing\n");
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pci_unmap_rom(pdev, bios);
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return -1;
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}
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bdb = (struct bdb_header *)(bios + i + vbt->bdb_offset);
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/* Grab useful general definitions */
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parse_general_features(dev_priv, bdb);
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parse_lfp_panel_data(dev_priv, bdb);
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parse_sdvo_panel_data(dev_priv, bdb);
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parse_sdvo_device_mapping(dev_priv, bdb);
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pci_unmap_rom(pdev, bios);
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return 0;
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}
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