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rockbox/firmware/target/arm/imx233/sansa-fuzeplus/lcd-fuzeplus.c
William Wilgus 1f63604e2c Fuze PLUS Fix lcd_update_rect() 
Lcd_update rect was hanging during horizontal screen update x = 238 and width = 2
which was within the bounds of the screen, this seems to be a weird corner case
but more testing needs done.

Update_rect now properly bounded between 0 - screen w/h
--Cleaned up code

Pixels in x are now multiples of 4.

Datasheet states:
-------------------------------------------------------------------------------------------
WORD_LENGTH=0 implies the input frame buffer is RGB 16 bits per pixel.
DATA_FORMAT_16_BIT field indicates if the pixels are in RGB 555 or RGB 565 format.
Limitations:
— BYTE_PACKING_FORMAT [3:0] should be 0x3 or 0xC if there is only one pixel per word.
— If there are two pixels per word, BYTE_PACKING_FORMAT [3:0] should be 0xF and
H_COUNT will be restricted to be a multiple of 2 pixels.

and

WORD_LENGTH=3 indicates that the input frame-buffer is RGB 24 bits per pixel (RGB 888). If
BYTE_PACKING_FORMAT [3:0] is 0x7, it indicates that there is only one pixel per 32-bit word
and there is no restriction on H_COUNT.
Limitations:
— If BYTE_PACKING_FORMAT [3:0] is 0xF, it indicates that the pixels are packed, i.e. there
are 4 pixels in 3 words or 12 bytes. In that case, H_COUNT must be a multiple of 4 pixels.
-------------------------------------------------------------------------------------------

We are using 16 bits per pixel and byte_packing = 0xF but device crashes with multiple of 2 pixels

Behaviour can be verified with plugin - oscilloscope, Horizontal mode device hangs as indicator
reaches right of screen

Change-Id: I1445f5334f4e7fe59304c65c76b47d0daa0614b2
2018-05-25 22:48:01 +02:00

676 lines
20 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (c) 2011 by Amaury Pouly
*
* 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
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <sys/types.h> /* off_t */
#include <string.h>
#include "cpu.h"
#include "system.h"
#include "kernel.h"
#include "backlight-target.h"
#include "lcd.h"
#include "lcdif-imx233.h"
#include "clkctrl-imx233.h"
#include "pinctrl-imx233.h"
#include "dcp-imx233.h"
#include "logf.h"
#ifndef BOOTLOADER
#include "button.h"
#include "font.h"
#include "action.h"
#endif
#ifdef HAVE_LCD_ENABLE
static bool lcd_on;
#endif
static int lcd_dcp_channel = -1;
#ifdef HAVE_LCD_INVERT
static int lcd_reg_0x61_val = 1; /* used to invert display */
#endif
#ifdef HAVE_LCD_FLIP
static int lcd_reg_3_val = 0x1030; /* controls to flip display */
#endif
static enum lcd_kind_t
{
LCD_KIND_7783 = 0x7783,
LCD_KIND_9325 = 0x9325,
} lcd_kind = LCD_KIND_7783;
static void setup_parameters(void)
{
imx233_lcdif_init();
imx233_lcdif_set_lcd_databus_width(18);
imx233_lcdif_set_word_length(18);
imx233_lcdif_set_timings(1, 2, 2, 2);
imx233_lcdif_enable_underflow_recover(true);
}
static void setup_lcd_pins(bool use_lcdif)
{
/* WARNING
* the B1P22 and B1P24 pins are used by the tuner i2c! Do NOT drive
* them as lcd_dotclk and lcd_hsync or it will break the tuner! */
imx233_pinctrl_acquire(1, 18, "lcd reset");
imx233_pinctrl_acquire(1, 19, "lcd rs");
imx233_pinctrl_acquire(1, 20, "lcd wr");
imx233_pinctrl_acquire(1, 21, "lcd cs");
imx233_pinctrl_acquire(1, 23, "lcd enable");
imx233_pinctrl_acquire(1, 25, "lcd vsync");
//imx233_pinctrl_acquire_mask(1, 0x3ffff, "lcd data");
if(use_lcdif)
{
imx233_pinctrl_set_function(1, 25, PINCTRL_FUNCTION_GPIO); /* lcd_vsync */
imx233_pinctrl_set_function(1, 21, PINCTRL_FUNCTION_MAIN); /* lcd_cs */
imx233_pinctrl_set_function(1, 23, PINCTRL_FUNCTION_GPIO); /* lcd_enable */
imx233_pinctrl_set_function(1, 18, PINCTRL_FUNCTION_MAIN); /* lcd_reset */
imx233_pinctrl_set_function(1, 19, PINCTRL_FUNCTION_MAIN); /* lcd_rs */
imx233_pinctrl_set_function(1, 16, PINCTRL_FUNCTION_MAIN); /* lcd_d16 */
imx233_pinctrl_set_function(1, 17, PINCTRL_FUNCTION_MAIN); /* lcd_d17 */
imx233_pinctrl_set_function(1, 20, PINCTRL_FUNCTION_MAIN); /* lcd_wr */
HW_PINCTRL_MUXSELn_CLR(2) = 0xffffffff; /* lcd_d{0-15} */
}
else
{
HW_PINCTRL_MUXSELn_SET(2) = 0xffffffff; /* lcd_d{0-15} */
HW_PINCTRL_DOEn_CLR(1) = 0x2bfffff;
imx233_pinctrl_set_function(1, 16, PINCTRL_FUNCTION_GPIO); /* lcd_d16 */
imx233_pinctrl_set_function(1, 17, PINCTRL_FUNCTION_GPIO); /* lcd_d17 */
imx233_pinctrl_set_function(1, 19, PINCTRL_FUNCTION_GPIO); /* lcd_rs */
imx233_pinctrl_set_function(1, 20, PINCTRL_FUNCTION_GPIO); /* lcd_wr */
imx233_pinctrl_set_function(1, 21, PINCTRL_FUNCTION_GPIO); /* lcd_cs */
imx233_pinctrl_set_function(1, 23, PINCTRL_FUNCTION_GPIO); /* lcd_enable */
imx233_pinctrl_set_function(1, 25, PINCTRL_FUNCTION_GPIO); /* lcd_vsync */
}
}
static void setup_lcd_pins_i80(bool i80)
{
if(i80)
{
imx233_pinctrl_set_drive(1, 19, PINCTRL_DRIVE_12mA); /* lcd_rs */
imx233_pinctrl_set_drive(1, 20, PINCTRL_DRIVE_12mA); /* lcd_wr */
imx233_pinctrl_set_drive(1, 21, PINCTRL_DRIVE_12mA); /* lcd_cs */
imx233_pinctrl_set_drive(1, 23, PINCTRL_DRIVE_12mA); /* lcd_enable */
imx233_pinctrl_set_function(1, 19, PINCTRL_FUNCTION_GPIO); /* lcd_rs */
imx233_pinctrl_set_function(1, 20, PINCTRL_FUNCTION_GPIO); /* lcd_wr */
imx233_pinctrl_set_function(1, 21, PINCTRL_FUNCTION_GPIO); /* lcd_cs */
imx233_pinctrl_set_function(1, 23, PINCTRL_FUNCTION_GPIO); /* lcd_enable */
/* lcd_{rs,wr,cs,enable} */
HW_PINCTRL_DOEn_SET(1) = (1 << 19) | (1 << 20) | (1 << 21) | (1 << 23);
HW_PINCTRL_DOUTn_SET(1) = (1 << 19) | (1 << 20) | (1 << 21) | (1 << 23);
HW_PINCTRL_DOEn_CLR(1) = 0x3ffff; /* lcd_d{0-17} */
HW_PINCTRL_MUXSELn_SET(2) = 0xffffffff; /* lcd_d{0-15} as GPIO */
imx233_pinctrl_set_function(1, 16, PINCTRL_FUNCTION_GPIO); /* lcd_d16 */
imx233_pinctrl_set_function(1, 17, PINCTRL_FUNCTION_GPIO); /* lcd_d17 */
imx233_pinctrl_set_function(1, 18, PINCTRL_FUNCTION_GPIO); /* lcd_reset */
imx233_pinctrl_set_function(1, 19, PINCTRL_FUNCTION_GPIO); /* lcd_rs */
}
else
{
HW_PINCTRL_DOUTn_SET(1) = (1 << 19) | (1 << 20) | (1 << 21) | (1 << 23);
imx233_pinctrl_set_drive(1, 19, PINCTRL_DRIVE_4mA); /* lcd_rs */
imx233_pinctrl_set_drive(1, 20, PINCTRL_DRIVE_4mA); /* lcd_wr */
imx233_pinctrl_set_drive(1, 21, PINCTRL_DRIVE_4mA); /* lcd_cs */
imx233_pinctrl_set_drive(1, 23, PINCTRL_DRIVE_4mA); /* lcd_enable */
imx233_pinctrl_set_function(1, 19, PINCTRL_FUNCTION_MAIN); /* lcd_rs */
imx233_pinctrl_set_function(1, 20, PINCTRL_FUNCTION_MAIN); /* lcd_wr */
imx233_pinctrl_set_function(1, 21, PINCTRL_FUNCTION_MAIN); /* lcd_cs */
HW_PINCTRL_DOEn_CLR(1) = 0x3ffff; /* lcd_d{0-17} */
HW_PINCTRL_MUXSELn_CLR(2) = 0xffffffff; /* lcd_d{0-15} as lcd_d{0-15} */
imx233_pinctrl_set_function(1, 16, PINCTRL_FUNCTION_MAIN); /* lcd_d16 */
imx233_pinctrl_set_function(1, 17, PINCTRL_FUNCTION_MAIN); /* lcd_d17 */
imx233_pinctrl_set_function(1, 18, PINCTRL_FUNCTION_MAIN); /* lcd_reset */
imx233_pinctrl_set_function(1, 19, PINCTRL_FUNCTION_MAIN); /* lcd_rs */
}
}
static void common_lcd_enable(bool enable)
{
imx233_lcdif_enable(enable);
setup_lcd_pins(enable); /* use GPIO pins when disable */
}
static void setup_lcdif(void)
{
setup_parameters();
common_lcd_enable(true);
imx233_lcdif_enable_bus_master(true);
}
static inline uint32_t encode_16_to_18(uint32_t a)
{
return ((a & 0xff) << 1) | (((a >> 8) & 0xff) << 10);
}
static inline uint32_t decode_18_to_16(uint32_t a)
{
return ((a >> 1) & 0xff) | ((a >> 2) & 0xff00);
}
static void setup_lcdif_clock(void)
{
/* the LCD seems to work at 24Mhz, so use the xtal clock with no divider */
imx233_clkctrl_enable(CLK_PIX, false);
imx233_clkctrl_set_div(CLK_PIX, 1);
imx233_clkctrl_set_bypass(CLK_PIX, true); /* use XTAL */
imx233_clkctrl_enable(CLK_PIX, true);
}
static uint32_t i80_read_register(uint32_t data_out)
{
imx233_lcdif_wait_ready();
/* lcd_enable is mapped to the RD pin of the controller */
imx233_pinctrl_set_gpio(1, 21, true); /* lcd_cs */
imx233_pinctrl_set_gpio(1, 19, true); /* lcd_rs */
imx233_pinctrl_set_gpio(1, 23, true); /* lcd_enable */
imx233_pinctrl_set_gpio(1, 20, true); /* lcd_wr */
HW_PINCTRL_DOEn_SET(1) = 0x3ffff; /* lcd_d{0-17} */
udelay(2);
imx233_pinctrl_set_gpio(1, 19, false); /* lcd_rs */
udelay(1);
imx233_pinctrl_set_gpio(1, 21, false); /* lcd_cs */
udelay(1);
imx233_pinctrl_set_gpio(1, 20, false); /* lcd_wr */
udelay(1);
HW_PINCTRL_DOUTn_SET(1) = data_out & 0x3ffff; /* lcd_d{0-17} */
udelay(1);
imx233_pinctrl_set_gpio(1, 20, true); /* lcd_wr */
udelay(3);
HW_PINCTRL_DOEn_CLR(1) = 0x3ffff; /* lcd_d{0-17} */
udelay(2);
imx233_pinctrl_set_gpio(1, 23, false); /* lcd_enable */
udelay(1);
imx233_pinctrl_set_gpio(1, 19, true); /* lcd_rs */
udelay(1);
imx233_pinctrl_set_gpio(1, 23, true); /* lcd_enable */
udelay(3);
imx233_pinctrl_set_gpio(1, 23, false); /* lcd_enable */
udelay(2);
uint32_t data_in = HW_PINCTRL_DINn(1) & 0x3ffff; /* lcd_d{0-17} */
udelay(1);
imx233_pinctrl_set_gpio(1, 23, true); /* lcd_enable */
udelay(1);
imx233_pinctrl_set_gpio(1, 21, true); /* lcd_cs */
udelay(1);
return data_in;
}
static void lcd_write_reg(uint32_t reg, uint32_t data)
{
uint32_t old_reg = reg;
imx233_lcdif_wait_ready();
/* get back to 18-bit word length */
imx233_lcdif_set_word_length(18);
reg = encode_16_to_18(reg);
data = encode_16_to_18(data);
imx233_lcdif_pio_send(false, 1, &reg);
if(old_reg != 0x22)
imx233_lcdif_pio_send(true, 1, &data);
}
static uint32_t lcd_read_reg(uint32_t reg)
{
setup_lcd_pins_i80(true);
uint32_t data_in = i80_read_register(encode_16_to_18(reg));
setup_lcd_pins_i80(false);
lcd_write_reg(0x22, 0);
return decode_18_to_16(data_in);
}
#define REG_MDELAY 0xffffffff
struct lcd_sequence_entry_t
{
uint32_t reg, data;
};
static void lcd_send_sequence(struct lcd_sequence_entry_t *seq, unsigned count)
{
for(;count-- > 0; seq++)
{
if(seq->reg == REG_MDELAY)
mdelay(seq->data);
else
lcd_write_reg(seq->reg, seq->data);
}
}
#define _begin_seq() static struct lcd_sequence_entry_t __seq[] = {
#define _mdelay(a) {REG_MDELAY, a},
#define _lcd_write_reg(a, b) {a, b},
#define _end_seq() }; lcd_send_sequence(__seq, sizeof(__seq) / sizeof(__seq[0]));
static void lcd_init_seq_7783(void)
{
_begin_seq()
_mdelay(200)
_lcd_write_reg(1, 0x100)
_lcd_write_reg(2, 0x700)
_lcd_write_reg(3, 0x1030)
_lcd_write_reg(7, 0x121)
_lcd_write_reg(8, 0x302)
_lcd_write_reg(9, 0x200)
_lcd_write_reg(0xa, 0)
_lcd_write_reg(0x10, 0x790)
_lcd_write_reg(0x11, 5)
_lcd_write_reg(0x12, 0)
_lcd_write_reg(0x13, 0)
_mdelay(100)
_lcd_write_reg(0x10, 0x12b0)
_mdelay(100)
_lcd_write_reg(0x11, 7)
_mdelay(100)
_lcd_write_reg(0x12, 0x89)
_lcd_write_reg(0x13, 0x1d00)
_lcd_write_reg(0x29, 0x2f)
_mdelay(50)
_lcd_write_reg(0x30, 0)
_lcd_write_reg(0x31, 0x505)
_lcd_write_reg(0x32, 0x205)
_lcd_write_reg(0x35, 0x206)
_lcd_write_reg(0x36, 0x408)
_lcd_write_reg(0x37, 0)
_lcd_write_reg(0x38, 0x504)
_lcd_write_reg(0x39, 0x206)
_lcd_write_reg(0x3c, 0x206)
_lcd_write_reg(0x3d, 0x408)
_lcd_write_reg(0x50, 0) /* left X ? */
_lcd_write_reg(0x51, 0xef) /* right X ? */
_lcd_write_reg(0x52, 0) /* top Y ? */
_lcd_write_reg(0x53, 0x13f) /* bottom Y ? */
_lcd_write_reg(0x20, 0) /* left X ? */
_lcd_write_reg(0x21, 0) /* top Y ? */
_lcd_write_reg(0x60, 0xa700)
_lcd_write_reg(0x61, 1)
_lcd_write_reg(0x90, 0x33)
_lcd_write_reg(0x2b, 0xa)
_lcd_write_reg(9, 0)
_lcd_write_reg(7, 0x133)
_mdelay(50)
_lcd_write_reg(0x22, 0)
_end_seq()
}
static void lcd_init_seq_9325(void)
{
_begin_seq()
_lcd_write_reg(0xe5, 0x78f0)
_lcd_write_reg(0xe3, 0x3008)
_lcd_write_reg(0xe7, 0x12)
_lcd_write_reg(0xef, 0x1231)
_lcd_write_reg(0, 1)
_lcd_write_reg(1, 0x100)
_lcd_write_reg(2, 0x700)
_lcd_write_reg(3, 0x1030)
_lcd_write_reg(4, 0)
_lcd_write_reg(8, 0x207)
_lcd_write_reg(9, 0)
_lcd_write_reg(0xa, 0)
_lcd_write_reg(0xc, 0)
_lcd_write_reg(0xd, 0)
_lcd_write_reg(0xf, 0)
_lcd_write_reg(0x10, 0)
_lcd_write_reg(0x11, 7)
_lcd_write_reg(0x12, 0)
_lcd_write_reg(0x13, 0)
_mdelay(20)
_lcd_write_reg(0x10, 0x1290)
_lcd_write_reg(0x11, 7)
_mdelay(50)
_lcd_write_reg(0x12, 0x19)
_mdelay(50)
_lcd_write_reg(0x13, 0x1700)
_lcd_write_reg(0x29, 0x14)
_mdelay(50)
_lcd_write_reg(0x20, 0)
_lcd_write_reg(0x21, 0)
_lcd_write_reg(0x30, 0x504)
_lcd_write_reg(0x31, 7)
_lcd_write_reg(0x32, 6)
_lcd_write_reg(0x35, 0x106)
_lcd_write_reg(0x36, 0x202)
_lcd_write_reg(0x37, 0x504)
_lcd_write_reg(0x38, 0x500)
_lcd_write_reg(0x39, 0x706)
_lcd_write_reg(0x3c, 0x204)
_lcd_write_reg(0x3d, 0x202)
_lcd_write_reg(0x50, 0)
_lcd_write_reg(0x51, 0xef)
_lcd_write_reg(0x52, 0)
_lcd_write_reg(0x53, 0x13f)
_lcd_write_reg(0x60, 0xa700)
_lcd_write_reg(0x61, 1)
_lcd_write_reg(0x6a, 0)
_lcd_write_reg(0x2b, 0xd)
_mdelay(50)
_lcd_write_reg(0x90, 0x11)
_lcd_write_reg(0x92, 0x600)
_lcd_write_reg(0x93, 3)
_lcd_write_reg(0x95, 0x110)
_lcd_write_reg(0x97, 0)
_lcd_write_reg(0x98, 0)
_lcd_write_reg(7, 0x173)
_lcd_write_reg(0x22, 0)
_end_seq()
}
static void lcd_sync_settings(void)
{
#ifdef HAVE_LCD_INVERT
lcd_write_reg(0x61, lcd_reg_0x61_val);
#endif
#ifdef HAVE_LCD_FLIP
lcd_write_reg(3, lcd_reg_3_val);
#endif
}
void lcd_init_device(void)
{
lcd_dcp_channel = imx233_dcp_acquire_channel(TIMEOUT_NOBLOCK);
if(lcd_dcp_channel < 0)
panicf("imx233_framebuffer_init: imx233_dcp_acquire_channel failed!");
setup_lcdif_clock();
setup_lcdif();
for(int i = 0; i < 10; i++)
{
lcd_kind = lcd_read_reg(0);
mdelay(5);
if(lcd_kind == LCD_KIND_7783 || lcd_kind == LCD_KIND_9325)
break;
}
// reset device
imx233_lcdif_reset_lcd(true);
mdelay(50);
imx233_lcdif_reset_lcd(false);
mdelay(10);
imx233_lcdif_reset_lcd(true);
switch(lcd_kind)
{
case LCD_KIND_7783: lcd_init_seq_7783(); break;
case LCD_KIND_9325: lcd_init_seq_9325(); break;
default:
lcd_kind = LCD_KIND_7783;
lcd_init_seq_7783(); break;
}
lcd_sync_settings();
#ifdef HAVE_LCD_ENABLE
lcd_on = true;
#endif
}
#ifdef HAVE_LCD_ENABLE
bool lcd_active(void)
{
return lcd_on;
}
static void lcd_enable_7783(bool enable)
{
if(!enable)
{
_begin_seq()
_lcd_write_reg(7, 0x131)
_mdelay(50)
_lcd_write_reg(7, 0x20)
_mdelay(50)
_lcd_write_reg(0x10, 0x82)
_mdelay(50)
_end_seq()
}
else
{
_begin_seq()
_lcd_write_reg(0x11, 5)
_lcd_write_reg(0x10, 0x12b0)
_mdelay(50)
_lcd_write_reg(7, 0x11)
_mdelay(50)
_lcd_write_reg(0x12, 0x89)
_mdelay(50)
_lcd_write_reg(0x13, 0x1d00)
_mdelay(50)
_lcd_write_reg(0x29, 0x2f)
_mdelay(50)
_lcd_write_reg(0x2b, 0xa)
_lcd_write_reg(7, 0x133)
_mdelay(50)
_lcd_write_reg(0x22, 0)
_end_seq()
}
}
static void lcd_enable_9325(bool enable)
{
if(!enable)
{
_begin_seq()
_lcd_write_reg(7, 0x131)
_mdelay(10)
_lcd_write_reg(7, 0x130)
_mdelay(10)
_lcd_write_reg(7, 0)
_lcd_write_reg(0x10, 0x80)
_lcd_write_reg(0x11, 0)
_lcd_write_reg(0x12, 0)
_lcd_write_reg(0x13, 0)
_mdelay(200)
_lcd_write_reg(0x10, 0x82)
_end_seq()
}
else
{
_begin_seq()
_lcd_write_reg(0x10, 0x80)
_lcd_write_reg(0x11, 0)
_lcd_write_reg(0x12, 0)
_lcd_write_reg(0x13, 0)
_lcd_write_reg(7, 1)
_mdelay(200)
_lcd_write_reg(0x10, 0x1290)
_lcd_write_reg(0x11, 7)
_mdelay(50)
_lcd_write_reg(0x12, 0x19)
_mdelay(50)
_lcd_write_reg(0x13, 0x1700)
_lcd_write_reg(0x29, 0x10)
_mdelay(50)
_lcd_write_reg(7, 0x133)
_lcd_write_reg(0x22, 0)
_end_seq()
}
}
void lcd_enable(bool enable)
{
if(lcd_on == enable)
return;
lcd_on = enable;
if(enable)
common_lcd_enable(true);
switch(lcd_kind)
{
case LCD_KIND_7783: lcd_enable_7783(enable); break;
case LCD_KIND_9325: lcd_enable_9325(enable); break;
}
if(!enable)
common_lcd_enable(false);
else
{
lcd_sync_settings();
send_event(LCD_EVENT_ACTIVATION, NULL);
}
}
#endif
#ifdef HAVE_LCD_INVERT
void lcd_set_invert_display(bool yesno)
{
lcd_reg_0x61_val = yesno ? 0 : 1;
#ifdef HAVE_LCD_ENABLE
if(!lcd_on)
return;
#endif
/* same for both kinds */
lcd_write_reg(0x61, lcd_reg_0x61_val);
}
#endif
#ifdef HAVE_LCD_FLIP
void lcd_set_flip(bool yesno)
{
lcd_reg_3_val = yesno ? 0x1000 : 0x1030;
#ifdef HAVE_LCD_ENABLE
if(!lcd_on)
return;
#endif
/* same for both kinds */
lcd_write_reg(3, lcd_reg_3_val);
}
#endif
void lcd_update(void)
{
lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
}
void lcd_update_rect(int x, int y, int w, int h)
{
#ifdef HAVE_LCD_ENABLE
if(!lcd_on)
return;
#endif
/* make sure the rectangle is bounded in the screen */
if (w > LCD_WIDTH - x)/* Clip right */
w = LCD_WIDTH - x;
if (x < 0)/* Clip left */
{
w += x;
x = 0;
}
if (w <= 0)
return; /* nothing left to do */
if (h > LCD_HEIGHT - y) /* Clip bottom */
h = LCD_HEIGHT - y;
if (y < 0) /* Clip top */
{
h += y;
y = 0;
}
if (h <= 0)
return; /* nothing left to do */
imx233_lcdif_wait_ready();
lcd_write_reg(0x50, x);
lcd_write_reg(0x51, x + w - 1);
lcd_write_reg(0x52, y);
lcd_write_reg(0x53, y + h - 1);
lcd_write_reg(0x20, x);
lcd_write_reg(0x21, y);
lcd_write_reg(0x22, 0);
imx233_lcdif_wait_ready();
imx233_lcdif_set_word_length(16);
imx233_lcdif_set_byte_packing_format(0xf); /* two pixels per 32-bit word */
/* there are two cases here:
* - either width = LCD_WIDTH and we can directly memcopy a part of lcd_framebuffer to FRAME
* and send it
* - either width != LCD_WIDTH and we have to build a contiguous copy of the rectangular area
* into FRAME before sending it (which is slower and doesn't use the hardware)
* In all cases, FRAME just acts as a temporary buffer.
* NOTE It's more interesting to do a copy to FRAME in all cases since in system mode
* the clock runs at 24MHz which provides barely 10MB/s bandwidth compared to >100MB/s
* for memcopy operations
*/
if(w == LCD_WIDTH)
{
memcpy((void *)FRAME, FBADDR(x,y), w * h * sizeof(fb_data));
}
else
{
for(int i = 0; i < h; i++)
memcpy((fb_data *)FRAME + i * w, FBADDR(x,y + i), w * sizeof(fb_data));
}
/* WARNING The LCDIF has a limitation on the vertical count ! In 16-bit packed mode
* (which we used, ie 16-bit per pixel, 2 pixels per 32-bit words), the v_count
* field must be a multiple of 2. Furthermore, it seems the lcd controller doesn't
* really like when both w and h are even, probably because the writes to the GRAM
* are done on several words and the controller requires dummy writes.
* The workaround is to always make sure that we send a number of pixels which is
* a multiple of 4 so that both the lcdif and the controller are happy. If any
* of w or h is odd, we will send a copy of the first pixels as dummy writes. We will
* send at most 3 bytes. We then send (w * h + 3) / 4 x 4 bytes.
*/
if(w % 4 || (h & 1) == 1)
{
/* copy three pixel after the last one */
for(int i = 0; i < 3; i++)
*((fb_data *)FRAME + w * h + i) = *((fb_data *)FRAME + i);
/* WARNING we need to update w and h to reflect the pixel count BUT it
* has no relation to w * h (it can even be 2 * prime). Hopefully, w <= 240 and
* h <= 320 so w * h <= 76800 and (w * h + 3) / 4 <= 38400 which fits into
* a 16-bit integer (horizontal count). */
h = (w * h + 3) / 4;
w = 4;
}
imx233_lcdif_dma_send((void *)FRAME_PHYS_ADDR, w, h);
}
#ifndef BOOTLOADER
bool lcd_debug_screen(void)
{
lcd_setfont(FONT_SYSFIXED);
while(1)
{
int button = get_action(CONTEXT_STD, HZ / 10);
switch(button)
{
case ACTION_STD_NEXT:
case ACTION_STD_PREV:
case ACTION_STD_OK:
case ACTION_STD_MENU:
lcd_setfont(FONT_UI);
return true;
case ACTION_STD_CANCEL:
lcd_setfont(FONT_UI);
return false;
}
lcd_clear_display();
lcd_putsf(0, 0, "lcd kind: %s",
lcd_kind == LCD_KIND_7783 ? "st7783" :
lcd_kind == LCD_KIND_9325 ? "ili9325" : "unknown");
lcd_update();
yield();
}
return true;
}
#endif
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