lcd.c

via framebuffer driver

/*
 * 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 "global.h"
#include "lcdtbl.h"

struct iga2_shadow_crtc_timing iga2_shadow_crtc_reg = {
	/* IGA2 Shadow Horizontal Total */
	{IGA2_SHADOW_HOR_TOTAL_REG_NUM, {{CR6D, 0, 7}, {CR71, 3, 3} } },
	/* IGA2 Shadow Horizontal Blank End */
	{IGA2_SHADOW_HOR_BLANK_END_REG_NUM, {{CR6E, 0, 7} } },
	/* IGA2 Shadow Vertical Total */
	{IGA2_SHADOW_VER_TOTAL_REG_NUM, {{CR6F, 0, 7}, {CR71, 0, 2} } },
	/* IGA2 Shadow Vertical Addressable Video */
	{IGA2_SHADOW_VER_ADDR_REG_NUM, {{CR70, 0, 7}, {CR71, 4, 6} } },
	/* IGA2 Shadow Vertical Blank Start */
	{IGA2_SHADOW_VER_BLANK_START_REG_NUM,
	 {{CR72, 0, 7}, {CR74, 4, 6} } },
	/* IGA2 Shadow Vertical Blank End */
	{IGA2_SHADOW_VER_BLANK_END_REG_NUM, {{CR73, 0, 7}, {CR74, 0, 2} } },
	/* IGA2 Shadow Vertical Sync Start */
	{IGA2_SHADOW_VER_SYNC_START_REG_NUM, {{CR75, 0, 7}, {CR76, 4, 6} } },
	/* IGA2 Shadow Vertical Sync End */
	{IGA2_SHADOW_VER_SYNC_END_REG_NUM, {{CR76, 0, 3} } }
};

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} } }
};
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 int 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 load_lcd_k400_patch_tbl(int set_hres, int set_vres,
	int panel_id);
static void load_lcd_p880_patch_tbl(int set_hres, int set_vres,
	int panel_id);
static void load_lcd_patch_regs(int set_hres, int set_vres,
	int panel_id, int set_iga);
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 void load_crtc_shadow_timing(struct display_timing mode_timing,
			     struct display_timing panel_timing);
static void viafb_load_scaling_factor_for_p4m900(int set_hres,
	int set_vres, int panel_hres, int panel_vres);

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 viafb_init_lcd_size(void)
{
	DEBUG_MSG(KERN_INFO "viafb_init_lcd_size()\n");
	DEBUG_MSG(KERN_INFO
		"viaparinfo->lvds_setting_info->get_lcd_size_method %d\n",
		viaparinfo->lvds_setting_info->get_lcd_size_method);

	switch (viaparinfo->lvds_setting_info->get_lcd_size_method) {
	case GET_LCD_SIZE_BY_SYSTEM_BIOS:
		break;
	case GET_LCD_SZIE_BY_HW_STRAPPING:
		break;
	case GET_LCD_SIZE_BY_VGA_BIOS:
		DEBUG_MSG(KERN_INFO "Get LCD Size method by VGA BIOS !!\n");
		viaparinfo->lvds_setting_info->lcd_panel_size =
		    fp_id_to_vindex(viafb_lcd_panel_id);
		DEBUG_MSG(KERN_INFO "LCD Panel_ID = %d\n",
			  viaparinfo->lvds_setting_info->lcd_panel_id);
		DEBUG_MSG(KERN_INFO "LCD Panel Size = %d\n",
			  viaparinfo->lvds_setting_info->lcd_panel_size);
		break;
	case GET_LCD_SIZE_BY_USER_SETTING:
		DEBUG_MSG(KERN_INFO "Get LCD Size method by user setting !!\n");
		viaparinfo->lvds_setting_info->lcd_panel_size =
		    fp_id_to_vindex(viafb_lcd_panel_id);
		DEBUG_MSG(KERN_INFO "LCD Panel_ID = %d\n",
			  viaparinfo->lvds_setting_info->lcd_panel_id);
		DEBUG_MSG(KERN_INFO "LCD Panel Size = %d\n",
			  viaparinfo->lvds_setting_info->lcd_panel_size);
		break;
	default:
		DEBUG_MSG(KERN_INFO "viafb_init_lcd_size fail\n");
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID1_800X600;
		viaparinfo->lvds_setting_info->lcd_panel_size =
		    fp_id_to_vindex(LCD_PANEL_ID1_800X600);
	}
	viaparinfo->lvds_setting_info2->lcd_panel_id =
		viaparinfo->lvds_setting_info->lcd_panel_id;
	viaparinfo->lvds_setting_info2->lcd_panel_size =
		viaparinfo->lvds_setting_info->lcd_panel_size;
	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. */
		if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
			viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
			    INTEGRATED_LVDS;
			DEBUG_MSG(KERN_INFO "Support two dual channel LVDS!\
				  (Internal LVDS + External LVDS)\n");
		} else {
			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
			    INTEGRATED_LVDS;
			DEBUG_MSG(KERN_INFO "Not found external LVDS,\
				  so can't support two dual channel LVDS!\n");
		}
	} else if (viafb_display_hardware_layout == HW_LAYOUT_LCD1_LCD2) {
		/* Two single channel LCD (Internal LVDS + Internal LVDS): */
		viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
		INTEGRATED_LVDS;
		viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
			INTEGRATED_LVDS;
		DEBUG_MSG(KERN_INFO "Support two single channel LVDS!\
			  (Internal LVDS + Internal LVDS)\n");
	} else if (viafb_display_hardware_layout != HW_LAYOUT_DVI_ONLY) {
		/* If we have found external LVDS, just use it,
		   otherwise, we will use internal LVDS as default. */
		if (!viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
			viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
			    INTEGRATED_LVDS;
			DEBUG_MSG(KERN_INFO "Found Integrated LVDS!\n");
		}
	} else {
		viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
			NON_LVDS_TRANSMITTER;
		DEBUG_MSG(KERN_INFO "Do not support LVDS!\n");
		return FALSE;
	}

	return TRUE;
}

int viafb_lvds_trasmitter_identify(void)
{
	u8 tmp;
	tmp = viaparinfo->chip_info->chip_on_slot;
	viaparinfo->chip_info->chip_on_slot = PORT_ON_AMR;
	if (viafb_lvds_identify_vt1636()) {
		viaparinfo->chip_info->lvds_chip_info.i2c_port = I2CPORTINDEX;
		DEBUG_MSG(KERN_INFO
			  "Found VIA VT1636 LVDS on port i2c 0x31 \n");
	} else {
		viaparinfo->chip_info->chip_on_slot = PORT_ON_AGP;
		if (viafb_lvds_identify_vt1636()) {
			viaparinfo->chip_info->lvds_chip_info.i2c_port =
				GPIOPORTINDEX; DEBUG_MSG(KERN_INFO
				  "Found VIA VT1636 LVDS on port gpio 0x2c \n");
		}
	}
	viaparinfo->chip_info->chip_on_slot = tmp;

	if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700)
		lvds_identify_integratedlvds();

	if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
		return TRUE;
	/* Check for VT1631: */
	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name = VT1631_LVDS;
	viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
		VT1631_LVDS_I2C_ADDR;

	if (check_lvds_chip(VT1631_DEVICE_ID_REG, VT1631_DEVICE_ID) != FAIL) {
		DEBUG_MSG(KERN_INFO "\n VT1631 LVDS ! \n");
		DEBUG_MSG(KERN_INFO "\n %2d",
			  viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
		DEBUG_MSG(KERN_INFO "\n %2d",
			  viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
		return (OK);
	}

	viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
		NON_LVDS_TRANSMITTER;
	viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
		VT1631_LVDS_I2C_ADDR;
	return (FAIL);
}

static int fp_id_to_vindex(int panel_id)
{
	DEBUG_MSG(KERN_INFO "fp_get_panel_id()\n");

	if (panel_id > LCD_PANEL_ID_MAXIMUM)
		viafb_lcd_panel_id = panel_id =
		viafb_read_reg(VIACR, CR3F) & 0x0F;

	switch (panel_id) {
	case 0x0:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 640;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID0_640X480;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_640X480);
		break;
	case 0x1:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID1_800X600;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_800X600);
		break;
	case 0x2:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID2_1024X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_1024X768);
		break;
	case 0x3:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID3_1280X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_1280X768);
		break;
	case 0x4:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID4_1280X1024;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_1280X1024);
		break;
	case 0x5:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID5_1400X1050;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_1400X1050);
		break;
	case 0x6:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID6_1600X1200;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_1600X1200);
		break;
	case 0x8:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_IDA_800X480;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_800X480);
		break;
	case 0x9:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID2_1024X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_1024X768);
		break;
	case 0xA:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID2_1024X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		return (VIA_RES_1024X768);
		break;
	case 0xB:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID2_1024X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		return (VIA_RES_1024X768);
		break;
	case 0xC:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID3_1280X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		return (VIA_RES_1280X768);
		break;
	case 0xD:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID4_1280X1024;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		return (VIA_RES_1280X1024);
		break;
	case 0xE:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID5_1400X1050;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		return (VIA_RES_1400X1050);
		break;
	case 0xF:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID6_1600X1200;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		return (VIA_RES_1600X1200);
		break;
	case 0x10:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1366;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID7_1366X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		return (VIA_RES_1368X768);
		break;
	case 0x11:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID8_1024X600;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_1024X600);
		break;
	case 0x12:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID3_1280X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_1280X768);
		break;
	case 0x13:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 800;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID9_1280X800;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_1280X800);
		break;
	case 0x14:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1360;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_IDB_1360X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		return (VIA_RES_1360X768);
		break;
	case 0x15:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_ID3_1280X768;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
		viaparinfo->lvds_setting_info->LCDDithering = 0;
		return (VIA_RES_1280X768);
		break;
	case 0x16:
		viaparinfo->lvds_setting_info->lcd_panel_hres = 480;
		viaparinfo->lvds_setting_info->lcd_panel_vres = 640;
		viaparinfo->lvds_setting_info->lcd_panel_id =
			LCD_PANEL_IDC_480X640;
		viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
		viaparinfo->lvds_setting_info->LCDDithering = 1;
		return (VIA_RES_480X640);