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

// SPDX-License-Identifier: GPL-2.0-only
/**************************************************************************
 * Copyright (c) 2011, Intel Corporation.
 * All Rights Reserved.
 *
 **************************************************************************/

#include <linux/delay.h>
#include <linux/dmi.h>
#include <linux/module.h>

#include <drm/drm.h>

#include "intel_bios.h"
#include "mid_bios.h"
#include "psb_drv.h"
#include "psb_intel_reg.h"
#include "psb_reg.h"

static int oaktrail_output_init(struct drm_device *dev)
{ … }

/*
 *	Provide the low level interfaces for the Moorestown backlight
 */

#define MRST_BLC_MAX_PWM_REG_FREQ …
#define BLC_PWM_PRECISION_FACTOR …
#define BLC_PWM_FREQ_CALC_CONSTANT …
#define MHz …
#define BLC_ADJUSTMENT_MAX …

static void oaktrail_set_brightness(struct drm_device *dev, int level)
{ … }

static int oaktrail_backlight_init(struct drm_device *dev)
{ … }

/*
 *	Provide the Moorestown specific chip logic and low level methods
 *	for power management
 */

/**
 *	oaktrail_save_display_registers	-	save registers lost on suspend
 *	@dev: our DRM device
 *
 *	Save the state we need in order to be able to restore the interface
 *	upon resume from suspend
 */
static int oaktrail_save_display_registers(struct drm_device *dev)
{ … }

/**
 *	oaktrail_restore_display_registers	-	restore lost register state
 *	@dev: our DRM device
 *
 *	Restore register state that was lost during suspend and resume.
 */
static int oaktrail_restore_display_registers(struct drm_device *dev)
{ … }

/**
 *	oaktrail_power_down	-	power down the display island
 *	@dev: our DRM device
 *
 *	Power down the display interface of our device
 */
static int oaktrail_power_down(struct drm_device *dev)
{ … }

/*
 * oaktrail_power_up
 *
 * Restore power to the specified island(s) (powergating)
 */
static int oaktrail_power_up(struct drm_device *dev)
{ … }

/* Oaktrail */
static const struct psb_offset oaktrail_regmap[2] = …;

static int oaktrail_chip_setup(struct drm_device *dev)
{ … }

static void oaktrail_teardown(struct drm_device *dev)
{ … }

const struct psb_ops oaktrail_chip_ops = …;