linux/drivers/gpu/drm/gma500/intel_bios.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (c) 2006 Intel Corporation
 *
 * Authors:
 *    Eric Anholt <[email protected]>
 */

#include <drm/display/drm_dp_helper.h>
#include <drm/drm.h>

#include "intel_bios.h"
#include "psb_drv.h"
#include "psb_intel_drv.h"
#include "psb_intel_reg.h"

#define TARGET_ADDR1 …
#define TARGET_ADDR2 …

static void *find_section(struct bdb_header *bdb, int section_id)
{ … }

static void
parse_edp(struct drm_psb_private *dev_priv, struct bdb_header *bdb)
{ … }

static u16
get_blocksize(void *p)
{ … }

static void fill_detail_timing_data(struct drm_display_mode *panel_fixed_mode,
			struct lvds_dvo_timing *dvo_timing)
{ … }

static void parse_backlight_data(struct drm_psb_private *dev_priv,
				struct bdb_header *bdb)
{ … }

/* Try to find integrated panel data */
static void parse_lfp_panel_data(struct drm_psb_private *dev_priv,
			    struct bdb_header *bdb)
{ … }

/* Try to find sdvo panel data */
static void parse_sdvo_panel_data(struct drm_psb_private *dev_priv,
		      struct bdb_header *bdb)
{ … }

static void parse_general_features(struct drm_psb_private *dev_priv,
		       struct bdb_header *bdb)
{ … }

static void
parse_sdvo_device_mapping(struct drm_psb_private *dev_priv,
			  struct bdb_header *bdb)
{ … }


static void
parse_driver_features(struct drm_psb_private *dev_priv,
		      struct bdb_header *bdb)
{ … }

static void
parse_device_mapping(struct drm_psb_private *dev_priv,
		       struct bdb_header *bdb)
{ … }


/**
 * psb_intel_init_bios - initialize VBIOS settings & find VBT
 * @dev: DRM device
 *
 * Loads the Video BIOS and checks that the VBT exists.  Sets scratch registers
 * to appropriate values.
 *
 * VBT existence is a sanity check that is relied on by other i830_bios.c code.
 * Note that it would be better to use a BIOS call to get the VBT, as BIOSes may
 * feed an updated VBT back through that, compared to what we'll fetch using
 * this method of groping around in the BIOS data.
 *
 * Returns 0 on success, nonzero on failure.
 */
int psb_intel_init_bios(struct drm_device *dev)
{ … }

/*
 * Destroy and free VBT data
 */
void psb_intel_destroy_bios(struct drm_device *dev)
{ … }