mirror of
https://github.com/LumaTeam/Luma3DS.git
synced 2026-02-22 09:54:38 +00:00
97cc70d35d
- previously, we left brightness voltage and LCD panel voltage on even though we disabled PWM and output signal, causing GSP to misdetect screen state in turn. Fix that (this fixes the issue mentioned above) - Initialize the LCD controller over I2C, this fixes some rare sync issues some screen have with other Arm9 homebrew This may not fix 100% of the issues, only the most egregious/dangerous ones. There's still a lot of tech debt in Luma's baremetal code, that necessitate a full rewrite to fix (not planned for this year)
157 lines
4.6 KiB
C
157 lines
4.6 KiB
C
/*
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* This file is part of Luma3DS
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* Copyright (C) 2016-2020 Aurora Wright, TuxSH
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Additional Terms 7.b and 7.c of GPLv3 apply to this file:
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* * Requiring preservation of specified reasonable legal notices or
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* author attributions in that material or in the Appropriate Legal
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* Notices displayed by works containing it.
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* * Prohibiting misrepresentation of the origin of that material,
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* or requiring that modified versions of such material be marked in
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* reasonable ways as different from the original version.
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*/
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/*
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* Screen init code by dark_samus, bil1s, Normmatt, delebile and others
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* Screen deinit code by tiniVi
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*/
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#include "screen.h"
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#include "config.h"
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#include "memory.h"
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#include "i2c.h"
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#include "utils.h"
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bool needToSetupScreens = true;
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struct fb fbs[2] =
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{
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{
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.top_left = (u8 *)0x18300000,
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.top_right = (u8 *)0x18300000,
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.bottom = (u8 *)0x18346500,
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},
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{
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.top_left = (u8 *)0x18400000,
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.top_right = (u8 *)0x18400000,
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.bottom = (u8 *)0x18446500,
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},
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};
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static const u32 brightness[4] = {0x5F, 0x4C, 0x39, 0x26};
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static volatile Arm11Operation *operation = (volatile Arm11Operation *)0x1FF80004;
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static void invokeArm11Function(Arm11Operation op)
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{
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while(*operation != ARM11_READY);
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*operation = op;
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while(*operation != ARM11_READY);
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}
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void prepareArm11ForFirmlaunch(void)
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{
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invokeArm11Function(PREPARE_ARM11_FOR_FIRMLAUNCH);
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}
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void deinitScreens(void)
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{
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if(ARESCREENSINITIALIZED) invokeArm11Function(DEINIT_SCREENS);
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// Backlight voltage off
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I2C_writeReg(I2C_DEV_MCU, 0x22, 0x14);
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wait(50);
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// LCD panel voltage off
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I2C_writeReg(I2C_DEV_MCU, 0x22, 0x01);
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wait(50);
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}
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void updateBrightness(u32 brightnessIndex)
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{
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*(vu32 *)ARM11_PARAMETERS_ADDRESS = brightness[brightnessIndex];
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invokeArm11Function(UPDATE_BRIGHTNESS);
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}
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void swapFramebuffers(bool isAlternate)
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{
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*(volatile bool *)ARM11_PARAMETERS_ADDRESS = isAlternate;
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invokeArm11Function(SWAP_FRAMEBUFFERS);
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}
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void clearScreens(bool isAlternate)
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{
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struct fb *fbTemp = isAlternate ? &fbs[1] : &fbs[0];
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*(volatile struct fb *)ARM11_PARAMETERS_ADDRESS = *fbTemp;
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invokeArm11Function(CLEAR_SCREENS);
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}
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void initScreens(void)
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{
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if(needToSetupScreens)
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{
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if(!ARESCREENSINITIALIZED || bootType == FIRMLAUNCH)
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{
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*(vu32 *)ARM11_PARAMETERS_ADDRESS = brightness[MULTICONFIG(BRIGHTNESS)];
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memcpy((void *)(ARM11_PARAMETERS_ADDRESS + 4), fbs, sizeof(fbs));
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invokeArm11Function(INIT_SCREENS);
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// Fragile code, needs proper fix/total rewrite of the baremetal components anyway
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// Assume controller revision is not 0x00 for either screen (this revision is extremely
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// old and shouldn't be seen in retail units nor normal devunits)
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// Controller reset off
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I2C_writeReg(I2C_DEV_LCD_TOP, 0xFE, 0xAA);
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I2C_writeReg(I2C_DEV_LCD_BOT, 0xFE, 0xAA);
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wait(5);
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// Controller power on
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I2C_writeReg(I2C_DEV_LCD_TOP, 0x01, 0x10);
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I2C_writeReg(I2C_DEV_LCD_BOT, 0x01, 0x10);
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wait(5);
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// Clear error flag
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I2C_writeReg(I2C_DEV_LCD_TOP, 0x60, 0x00);
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I2C_writeReg(I2C_DEV_LCD_BOT, 0x60, 0x00);
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wait(5);
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// LCD panel (bias ?) voltage on
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I2C_writeReg(I2C_DEV_MCU, 0x22, 0x02);
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wait(50);
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// Backlight voltage on
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I2C_writeReg(I2C_DEV_MCU, 0x22, 0x28);
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wait(5);
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}
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else updateBrightness(MULTICONFIG(BRIGHTNESS));
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memcpy((void *)ARM11_PARAMETERS_ADDRESS, fbs, sizeof(fbs));
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invokeArm11Function(SETUP_FRAMEBUFFERS);
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clearScreens(true);
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needToSetupScreens = false;
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}
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clearScreens(false);
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swapFramebuffers(false);
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}
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void zerofillN3dsAblRegisters(void)
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{
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invokeArm11Function(ZEROFILL_N3DS_ABL_REGISTERS);
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}
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