linux/drivers/gpu/drm/ast/ast_dp501.c

// SPDX-License-Identifier: GPL-2.0

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

#include "ast_drv.h"

MODULE_FIRMWARE(…) …;

static void ast_release_firmware(void *data)
{ … }

static int ast_load_dp501_microcode(struct drm_device *dev)
{ … }

static void send_ack(struct ast_device *ast)
{ … }

static void send_nack(struct ast_device *ast)
{ … }

static bool wait_ack(struct ast_device *ast)
{ … }

static bool wait_nack(struct ast_device *ast)
{ … }

static void set_cmd_trigger(struct ast_device *ast)
{ … }

static void clear_cmd_trigger(struct ast_device *ast)
{ … }

#if 0
static bool wait_fw_ready(struct ast_device *ast)
{
	u8 waitready;
	u32 retry = 0;
	do {
		waitready = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd2, 0xff);
		waitready &= 0x40;
		udelay(100);
	} while ((!waitready) && (retry++ < 1000));

	if (retry < 1000)
		return true;
	else
		return false;
}
#endif

static bool ast_write_cmd(struct drm_device *dev, u8 data)
{ … }

static bool ast_write_data(struct drm_device *dev, u8 data)
{ … }

#if 0
static bool ast_read_data(struct drm_device *dev, u8 *data)
{
	struct ast_device *ast = to_ast_device(dev);
	u8 tmp;

	*data = 0;

	if (wait_ack(ast) == false)
		return false;
	tmp = ast_get_index_reg_mask(ast, AST_IO_VGACRI, 0xd3, 0xff);
	*data = tmp;
	if (wait_nack(ast) == false) {
		send_nack(ast);
		return false;
	}
	send_nack(ast);
	return true;
}

static void clear_cmd(struct ast_device *ast)
{
	send_nack(ast);
	ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x9a, 0x00, 0x00);
}
#endif

void ast_set_dp501_video_output(struct drm_device *dev, u8 mode)
{ … }

static u32 get_fw_base(struct ast_device *ast)
{ … }

bool ast_backup_fw(struct drm_device *dev, u8 *addr, u32 size)
{ … }

static bool ast_launch_m68k(struct drm_device *dev)
{ … }

bool ast_dp501_is_connected(struct ast_device *ast)
{ … }

bool ast_dp501_read_edid(struct drm_device *dev, u8 *ediddata)
{ … }

static bool ast_init_dvo(struct drm_device *dev)
{ … }


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

void ast_init_3rdtx(struct drm_device *dev)
{ … }