path: root/drivers/gpu/drm/i2c/adv7511.c

/*
 * Analog Devices ADV7511 HDMI transmitter driver
 *
 * Copyright 2012 Analog Devices Inc.
 *
 * Licensed under the GPL-2.
 */

#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/regmap.h>
#include <linux/slab.h>

#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_encoder_slave.h>

#include "adv7511.h"

struct adv7511 {
	struct i2c_client *i2c_main;
	struct i2c_client *i2c_edid;

	struct regmap *regmap;
	struct regmap *packet_memory_regmap;
	enum drm_connector_status status;
	bool powered;

	unsigned int f_tmds;

	unsigned int current_edid_segment;
	uint8_t edid_buf[256];
	bool edid_read;

	wait_queue_head_t wq;
	struct drm_encoder *encoder;

	bool embedded_sync;
	enum adv7511_sync_polarity vsync_polarity;
	enum adv7511_sync_polarity hsync_polarity;
	bool rgb;

	struct edid *edid;

	struct gpio_desc *gpio_pd;
};

static struct adv7511 *encoder_to_adv7511(struct drm_encoder *encoder)
{
	return to_encoder_slave(encoder)->slave_priv;
}

/* ADI recommended values for proper operation. */
static const struct reg_sequence adv7511_fixed_registers[] = {
	{ 0x98, 0x03 },
	{ 0x9a, 0xe0 },
	{ 0x9c, 0x30 },
	{ 0x9d, 0x61 },
	{ 0xa2, 0xa4 },
	{ 0xa3, 0xa4 },
	{ 0xe0, 0xd0 },
	{ 0xf9, 0x00 },
	{ 0x55, 0x02 },
};

/* -----------------------------------------------------------------------------
 * Register access
 */

static const uint8_t adv7511_register_defaults[] = {
	0x12, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 00 */
	0x00, 0x00, 0x01, 0x0e, 0xbc, 0x18, 0x01, 0x13,
	0x25, 0x37, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 10 */
	0x46, 0x62, 0x04, 0xa8, 0x00, 0x00, 0x1c, 0x84,
	0x1c, 0xbf, 0x04, 0xa8, 0x1e, 0x70, 0x02, 0x1e, /* 20 */
	0x00, 0x00, 0x04, 0xa8, 0x08, 0x12, 0x1b, 0xac,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 30 */
	0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, 0xb0,
	0x00, 0x50, 0x90, 0x7e, 0x79, 0x70, 0x00, 0x00, /* 40 */
	0x00, 0xa8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x02, 0x0d, 0x00, 0x00, 0x00, 0x00, /* 50 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 60 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x01, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 70 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 80 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 90 */
	0x0b, 0x02, 0x00, 0x18, 0x5a, 0x60, 0x00, 0x00,
	0x00, 0x00, 0x80, 0x80, 0x08, 0x04, 0x00, 0x00, /* a0 */
	0x00, 0x00, 0x00, 0x40, 0x00, 0x00, 0x40, 0x14,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* b0 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* c0 */
	0x00, 0x03, 0x00, 0x00, 0x02, 0x00, 0x01, 0x04,
	0x30, 0xff, 0x80, 0x80, 0x80, 0x00, 0x00, 0x00, /* d0 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x01,
	0x80, 0x75, 0x00, 0x00, 0x60, 0x00, 0x00, 0x00, /* e0 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x75, 0x11, 0x00, /* f0 */
	0x00, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
};

static bool adv7511_register_volatile(struct device *dev, unsigned int reg)
{
	switch (reg) {
	case ADV7511_REG_CHIP_REVISION:
	case ADV7511_REG_SPDIF_FREQ:
	case ADV7511_REG_CTS_AUTOMATIC1:
	case ADV7511_REG_CTS_AUTOMATIC2