xref: /linux/drivers/gpu/drm/ast/ast_2600.c (revision b1ce4ab06f70fa1dea6b4b6a372aa43989c55897)

// SPDX-License-Identifier: MIT
/*
 * Copyright 2012 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 */
/*
 * Authors: Dave Airlie <airlied@redhat.com>
 */

#include "ast_drv.h"
#include "ast_post.h"

/*
 * POST
 */

void ast_2600_set_def_ext_reg(struct ast_device *ast)
{
	static const u8 extreginfo[] = { 0x0f, 0x04, 0x1c, 0xff };
	u8 i, index, reg;
	const u8 *ext_reg_info;

	/* reset scratch */
	for (i = 0x81; i <= 0x9f; i++)
		ast_set_index_reg(ast, AST_IO_VGACRI, i, 0x00);

	ext_reg_info = extreginfo;
	index = 0xa0;
	while (*ext_reg_info != 0xff) {
		ast_set_index_reg_mask(ast, AST_IO_VGACRI, index, 0x00, *ext_reg_info);
		index++;
		ext_reg_info++;
	}

	/* disable standard IO/MEM decode if secondary */
	/* ast_set_index_reg-mask(ast, AST_IO_VGACRI, 0xa1, 0xff, 0x3); */

	/* Set Ext. Default */
	ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0x8c, 0x00, 0x01);
	ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb7, 0x00, 0x00);

	/* Enable RAMDAC for A1 */
	reg = 0x04;
	ast_set_index_reg_mask(ast, AST_IO_VGACRI, 0xb6, 0xff, reg);
}

int ast_2600_post(struct ast_device *ast)
{
	ast_2600_set_def_ext_reg(ast);

	if (ast->tx_chip == AST_TX_ASTDP)
		return ast_dp_launch(ast);

	return 0;
}