![Alan Cox](/assets/img/avatar_default.png)
Finally move the API where it can be seen Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
304 lines
8.2 KiB
C
304 lines
8.2 KiB
C
/*
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* Copyright (c) 2006 Intel Corporation
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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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 <drm/drmP.h>
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#include <drm/drm.h>
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#include "gma_drm.h"
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#include "psb_drv.h"
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#include "psb_intel_drv.h"
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#include "psb_intel_reg.h"
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#include "intel_bios.h"
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static void *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 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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static void parse_backlight_data(struct drm_psb_private *dev_priv,
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struct bdb_header *bdb)
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{
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struct bdb_lvds_backlight *vbt_lvds_bl = NULL;
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struct bdb_lvds_backlight *lvds_bl;
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u8 p_type = 0;
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void *bl_start = NULL;
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struct bdb_lvds_options *lvds_opts
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= find_section(bdb, BDB_LVDS_OPTIONS);
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dev_priv->lvds_bl = NULL;
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if (lvds_opts)
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p_type = lvds_opts->panel_type;
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else
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return;
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bl_start = find_section(bdb, BDB_LVDS_BACKLIGHT);
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vbt_lvds_bl = (struct bdb_lvds_backlight *)(bl_start + 1) + p_type;
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lvds_bl = kzalloc(sizeof(*vbt_lvds_bl), GFP_KERNEL);
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if (!lvds_bl) {
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dev_err(dev_priv->dev->dev, "out of memory for backlight data\n");
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return;
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}
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memcpy(lvds_bl, vbt_lvds_bl, sizeof(*vbt_lvds_bl));
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dev_priv->lvds_bl = lvds_bl;
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}
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/* Try to find integrated panel data */
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static void parse_lfp_panel_data(struct drm_psb_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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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 = kzalloc(sizeof(*panel_fixed_mode),
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GFP_KERNEL);
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if (panel_fixed_mode == NULL) {
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dev_err(dev_priv->dev->dev, "out of memory for fixed panel mode\n");
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return;
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}
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dev_priv->lvds_vbt = 1;
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fill_detail_timing_data(panel_fixed_mode, dvo_timing);
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if (panel_fixed_mode->htotal > 0 && panel_fixed_mode->vtotal > 0) {
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dev_priv->lfp_lvds_vbt_mode = panel_fixed_mode;
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drm_mode_debug_printmodeline(panel_fixed_mode);
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} else {
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dev_dbg(dev_priv->dev->dev, "ignoring invalid LVDS VBT\n");
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dev_priv->lvds_vbt = 0;
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kfree(panel_fixed_mode);
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}
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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 parse_sdvo_panel_data(struct drm_psb_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 = kzalloc(sizeof(*panel_fixed_mode), GFP_KERNEL);
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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 parse_general_features(struct drm_psb_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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dev_priv->lvds_ssc_freq
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= general->ssc_freq ? 100 : 96;
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}
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}
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}
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/**
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* psb_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 psb_intel_init_bios(struct drm_device *dev)
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{
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struct drm_psb_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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dev_err(dev->dev, "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_backlight_data(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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/**
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* Destroy and free VBT data
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*/
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void psb_intel_destroy_bios(struct drm_device *dev)
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{
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struct drm_psb_private *dev_priv = dev->dev_private;
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struct drm_display_mode *sdvo_lvds_vbt_mode =
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dev_priv->sdvo_lvds_vbt_mode;
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struct drm_display_mode *lfp_lvds_vbt_mode =
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dev_priv->lfp_lvds_vbt_mode;
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struct bdb_lvds_backlight *lvds_bl =
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dev_priv->lvds_bl;
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/*free sdvo panel mode*/
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if (sdvo_lvds_vbt_mode) {
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dev_priv->sdvo_lvds_vbt_mode = NULL;
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kfree(sdvo_lvds_vbt_mode);
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}
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if (lfp_lvds_vbt_mode) {
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dev_priv->lfp_lvds_vbt_mode = NULL;
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kfree(lfp_lvds_vbt_mode);
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}
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if (lvds_bl) {
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dev_priv->lvds_bl = NULL;
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kfree(lvds_bl);
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}
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}
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