path: root/drivers/video/via/lcd.c

/*
 * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
 * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.

 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation;
 * either version 2, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR
 * A PARTICULAR PURPOSE.See the GNU General Public License
 * for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc.,
 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
#include <linux/via-core.h>
#include <linux/via_i2c.h>
#include "global.h"

#define viafb_compact_res(x, y) (((x)<<16)|(y))

/* CLE266 Software Power Sequence */
/* {Mask}, {Data}, {Delay} */
static const int PowerSequenceOn[3][3] = {
	{0x10, 0x08, 0x06}, {0x10, 0x08, 0x06},	{0x19, 0x1FE, 0x01}
};
static const int PowerSequenceOff[3][3] = {
	{0x06, 0x08, 0x10}, {0x00, 0x00, 0x00},	{0xD2, 0x19, 0x01}
};

static struct _lcd_scaling_factor lcd_scaling_factor = {
	/* LCD Horizontal Scaling Factor Register */
	{LCD_HOR_SCALING_FACTOR_REG_NUM,
	 {{CR9F, 0, 1}, {CR77, 0, 7}, {CR79, 4, 5} } },
	/* LCD Vertical Scaling Factor Register */
	{LCD_VER_SCALING_FACTOR_REG_NUM,
	 {{CR79, 3, 3}, {CR78, 0, 7}, {CR79, 6, 7} } }
};
static struct _lcd_scaling_factor lcd_scaling_factor_CLE = {
	/* LCD Horizontal Scaling Factor Register */
	{LCD_HOR_SCALING_FACTOR_REG_NUM_CLE, {{CR77, 0, 7}, {CR79, 4, 5} } },
	/* LCD Vertical Scaling Factor Register */
	{LCD_VER_SCALING_FACTOR_REG_NUM_CLE, {{CR78, 0, 7}, {CR79, 6, 7} } }
};

static int check_lvds_chip(int device_id_subaddr, int device_id);
static bool lvds_identify_integratedlvds(void);
static void __devinit fp_id_to_vindex(int panel_id);
static int lvds_register_read(int index);
static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
		      int panel_vres);
static void via_pitch_alignment_patch_lcd(
	struct lvds_setting_information *plvds_setting_info,
				   struct lvds_chip_information
				   *plvds_chip_info);
static void lcd_patch_skew_dvp0(struct lvds_setting_information
			 *plvds_setting_info,
			 struct lvds_chip_information *plvds_chip_info);
static void lcd_patch_skew_dvp1(struct lvds_setting_information
			 *plvds_setting_info,
			 struct lvds_chip_information *plvds_chip_info);
static void lcd_patch_skew(struct lvds_setting_information
	*plvds_setting_info, struct lvds_chip_information *plvds_chip_info);

static void integrated_lvds_disable(struct lvds_setting_information
			     *plvds_setting_info,
			     struct lvds_chip_information *plvds_chip_info);
static void integrated_lvds_enable(struct lvds_setting_information
			    *plvds_setting_info,
			    struct lvds_chip_information *plvds_chip_info);
static void lcd_powersequence_off(void);
static void lcd_powersequence_on(void);
static void fill_lcd_format(void);
static void check_diport_of_integrated_lvds(
	struct lvds_chip_information *plvds_chip_info,
				     struct lvds_setting_information
				     *plvds_setting_info);
static struct display_timing lcd_centering_timging(struct display_timing
					    mode_crt_reg,
					   struct display_timing panel_crt_reg);

static int check_lvds_chip(int device_id_subaddr, int device_id)
{
	if (lvds_register_read(device_id_subaddr) == device_id)
		return OK;
	else
		return FAIL;
}

void __devinit viafb_init_lcd_size(void)
{
	DEBUG_MSG(KERN_INFO "viafb_init_lcd_size()\n");

	fp_id_to_vindex(viafb_lcd_panel_id);
	viaparinfo->lvds_setting_info2->lcd_panel_hres =
		viaparinfo->lvds_setting_info->lcd_panel_hres;
	viaparinfo->lvds_setting_info2->lcd_panel_vres =
		viaparinfo->lvds_setting_info->lcd_panel_vres;
	viaparinfo->lvds_setting_info2->device_lcd_dualedge =
	    viaparinfo->lvds_setting_info->device_lcd_dualedge;
	viaparinfo->lvds_setting_info2->LCDDithering =
		viaparinfo->lvds_setting_info->LCDDithering;
}

static bool lvds_identify_integratedlvds(void)
{
	if (viafb_display_hardware_layout == HW_LAYOUT_LCD_EXTERNAL_LCD2) {
		/* Two dual channel LCD (Internal LVDS + External LVDS): */
		/* If we have an external LVDS, such as VT1636, we should
		   have its chip ID already. */