rockbox/firmware/target/arm/imx233/sony-nwz/lcd-nwze370.c

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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (c) 2013 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 "backlight-target.h"
#include "lcd.h"
#include "lcdif-imx233.h"
#include "clkctrl-imx233.h"
#include "pinctrl-imx233.h"
#include "logf.h"
#ifdef HAVE_LCD_ENABLE
static bool lcd_on;
#endif
static void lcd_write_reg(uint8_t reg, void *data, int data_len)
{
imx233_lcdif_set_data_swizzle(0);
imx233_lcdif_set_word_length(8);
imx233_lcdif_pio_send(false, 1, &reg);
imx233_lcdif_pio_send(true, data_len, data);
}
static void lcd_init_seq(void)
{
// seems compatible with ILI9163
lcd_write_reg(1, NULL, 0); // software reset
lcd_write_reg(0x11, NULL, 0); // sleep out
mdelay(150);
/* format: (<cmd> <data size> <data0> <dataN>)+ */
static uint8_t init_seq[] =
{
/* cmd sz data... */
0x26, 1, 4, /* Gamma Set */
0xb1, 2, 9, 0xd, /* Frame Rate */
0xc0, 2, 8, 0, /* Power Control 1 */
0xc1, 1, 5, /* Power Control 2 */
0xc5, 2, 0x31, 0x40, /* VCOM Control 1 */
0xc7, 1, 0xc8, /* VCOM Offset Control */
0xec, 1, 0xc, /* Unknown */
0x3a, 1, 5, /* Interface Pixel Format */
0x2a, 4, 0, 0, 0, 0x7f, /* Column Address */
0x2b, 4, 0, 0, 0, 0x9f, /* Page Address Set */
0x35, 1, 0, /* Tear Effect Line On */
0x36, 1, 0xc8, /* Memory access Control */
0xb4, 1, 0, /* Display Inversion */
0xb7, 1, 0, /* Source Driver Direction Control */
0xb8, 1, 0, /* Gate Driver Direction Control */
0xf2, 1, 1, /* Gamma Adjustment */
0xe0, 15, 0x3f, 0x20, 0x1d, 0x2d, 0x26, 0x0c, 0x4b, 0xb7,
0x39, 0x17, 0x1d, 0x16, 0x16, 0x10, 0x00, /* Positive Gamma */
0xe1, 15, 0x00, 0x1f, 0x21, 0x12, 0x18, 0x13, 0x34, 0x48,
0x46, 0x08, 0x21, 0x29, 0x28, 0x2f, 0x3f, /* Negative Gamma */
0x29, 0, /* Display On */
};
for(unsigned i = 0; i < sizeof(init_seq); )
{
lcd_write_reg(init_seq[i], &init_seq[i + 2], init_seq[i + 1]);
i += 2 + init_seq[i + 1];
}
}
void lcd_init_device(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);
imx233_lcdif_init();
imx233_lcdif_set_lcd_databus_width(8);
imx233_lcdif_set_timings(2, 2, 2, 2);
imx233_lcdif_enable_underflow_recover(true);
imx233_lcdif_setup_system_pins(8);
imx233_lcdif_set_byte_packing_format(0xf); /* two pixels per 32-bit word */
// reset device
imx233_lcdif_reset_lcd(true);
mdelay(10);
imx233_lcdif_reset_lcd(false);
mdelay(10);
imx233_lcdif_reset_lcd(true);
mdelay(150);
lcd_init_seq();
#ifdef HAVE_LCD_ENABLE
lcd_on = true;
#endif
}
#ifdef HAVE_LCD_ENABLE
bool lcd_active(void)
{
return lcd_on;
}
static void lcd_enable_seq(bool enable)
{
if(enable)
{
lcd_write_reg(0x11, NULL, 0);
lcd_write_reg(0x29, NULL, 0);
}
else
{
lcd_write_reg(0x28, NULL, 0);
lcd_write_reg(0x10, NULL, 0);
}
}
void lcd_enable(bool enable)
{
if(lcd_on == enable)
return;
lcd_on = enable;
if(enable)
imx233_lcdif_enable(true);
lcd_enable_seq(enable);
if(!enable)
imx233_lcdif_enable(false);
else
send_event(LCD_EVENT_ACTIVATION, NULL);
}
#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 included in the screen */
x = MIN(x, LCD_WIDTH);
y = MIN(y, LCD_HEIGHT);
w = MIN(w, LCD_WIDTH - x);
h = MIN(h, LCD_HEIGHT - y);
imx233_lcdif_wait_ready();
uint32_t window = x << 8 | (x + w - 1) << 24;
lcd_write_reg(0x2a, &window, sizeof(window));
window = y << 8 | (y + h - 1) << 24;
lcd_write_reg(0x2b, &window, sizeof(window));
lcd_write_reg(0x2c, NULL, 0);
imx233_lcdif_wait_ready();
imx233_lcdif_set_data_swizzle(3);
imx233_lcdif_set_word_length(8);
/* 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
{
void* (*fbaddr)(int x, int y) = FB_CURRENTVP_BUFFER->get_address_fn;
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 % 2 == 1 || h % 2 == 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 * 2, h);
}