220 lines
7.3 KiB
C
220 lines
7.3 KiB
C
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (c) 2013 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include <sys/types.h> /* off_t */
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#include <string.h>
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#include "cpu.h"
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#include "system.h"
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#include "backlight-target.h"
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#include "lcd.h"
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#include "lcdif-imx233.h"
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#include "clkctrl-imx233.h"
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#include "pinctrl-imx233.h"
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#include "logf.h"
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#ifdef HAVE_LCD_ENABLE
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static bool lcd_on;
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#endif
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static void lcd_write_reg(uint8_t reg, void *data, int data_len)
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{
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imx233_lcdif_set_data_swizzle(0);
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imx233_lcdif_set_word_length(8);
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imx233_lcdif_pio_send(false, 1, ®);
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imx233_lcdif_pio_send(true, data_len, data);
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}
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static void lcd_init_seq(void)
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{
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// seems compatible with ILI9163
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lcd_write_reg(1, NULL, 0); // software reset
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lcd_write_reg(0x11, NULL, 0); // sleep out
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mdelay(150);
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/* format: (<cmd> <data size> <data0> <dataN>)+ */
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static uint8_t init_seq[] =
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{
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/* cmd sz data... */
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0x26, 1, 4, /* Gamma Set */
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0xb1, 2, 9, 0xd, /* Frame Rate */
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0xc0, 2, 8, 0, /* Power Control 1 */
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0xc1, 1, 5, /* Power Control 2 */
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0xc5, 2, 0x31, 0x40, /* VCOM Control 1 */
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0xc7, 1, 0xc8, /* VCOM Offset Control */
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0xec, 1, 0xc, /* Unknown */
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0x3a, 1, 5, /* Interface Pixel Format */
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0x2a, 4, 0, 0, 0, 0x7f, /* Column Address */
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0x2b, 4, 0, 0, 0, 0x9f, /* Page Address Set */
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0x35, 1, 0, /* Tear Effect Line On */
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0x36, 1, 0xc8, /* Memory access Control */
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0xb4, 1, 0, /* Display Inversion */
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0xb7, 1, 0, /* Source Driver Direction Control */
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0xb8, 1, 0, /* Gate Driver Direction Control */
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0xf2, 1, 1, /* Gamma Adjustment */
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0xe0, 15, 0x3f, 0x20, 0x1d, 0x2d, 0x26, 0x0c, 0x4b, 0xb7,
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0x39, 0x17, 0x1d, 0x16, 0x16, 0x10, 0x00, /* Positive Gamma */
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0xe1, 15, 0x00, 0x1f, 0x21, 0x12, 0x18, 0x13, 0x34, 0x48,
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0x46, 0x08, 0x21, 0x29, 0x28, 0x2f, 0x3f, /* Negative Gamma */
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0x29, 0, /* Display On */
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};
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for(unsigned i = 0; i < sizeof(init_seq); )
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{
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lcd_write_reg(init_seq[i], &init_seq[i + 2], init_seq[i + 1]);
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i += 2 + init_seq[i + 1];
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}
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}
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void lcd_init_device(void)
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{
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/* the LCD seems to work at 24Mhz, so use the xtal clock with no divider */
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imx233_clkctrl_enable(CLK_PIX, false);
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imx233_clkctrl_set_div(CLK_PIX, 1);
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imx233_clkctrl_set_bypass(CLK_PIX, true); /* use XTAL */
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imx233_clkctrl_enable(CLK_PIX, true);
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imx233_lcdif_init();
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imx233_lcdif_set_lcd_databus_width(8);
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imx233_lcdif_set_timings(2, 2, 2, 2);
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imx233_lcdif_enable_underflow_recover(true);
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imx233_lcdif_setup_system_pins(8);
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imx233_lcdif_set_byte_packing_format(0xf); /* two pixels per 32-bit word */
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// reset device
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imx233_lcdif_reset_lcd(true);
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mdelay(10);
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imx233_lcdif_reset_lcd(false);
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mdelay(10);
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imx233_lcdif_reset_lcd(true);
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mdelay(150);
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lcd_init_seq();
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#ifdef HAVE_LCD_ENABLE
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lcd_on = true;
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#endif
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}
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#ifdef HAVE_LCD_ENABLE
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bool lcd_active(void)
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{
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return lcd_on;
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}
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static void lcd_enable_seq(bool enable)
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{
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if(enable)
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{
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lcd_write_reg(0x11, NULL, 0);
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lcd_write_reg(0x29, NULL, 0);
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}
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else
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{
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lcd_write_reg(0x28, NULL, 0);
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lcd_write_reg(0x10, NULL, 0);
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}
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}
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void lcd_enable(bool enable)
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{
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if(lcd_on == enable)
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return;
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lcd_on = enable;
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if(enable)
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imx233_lcdif_enable(true);
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lcd_enable_seq(enable);
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if(!enable)
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imx233_lcdif_enable(false);
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else
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send_event(LCD_EVENT_ACTIVATION, NULL);
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}
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#endif
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void lcd_update(void)
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{
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lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT);
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}
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void lcd_update_rect(int x, int y, int w, int h)
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{
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#ifdef HAVE_LCD_ENABLE
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if(!lcd_on)
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return;
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#endif
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/* make sure the rectangle is included in the screen */
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x = MIN(x, LCD_WIDTH);
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y = MIN(y, LCD_HEIGHT);
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w = MIN(w, LCD_WIDTH - x);
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h = MIN(h, LCD_HEIGHT - y);
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imx233_lcdif_wait_ready();
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uint32_t window = x << 8 | (x + w - 1) << 24;
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lcd_write_reg(0x2a, &window, sizeof(window));
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window = y << 8 | (y + h - 1) << 24;
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lcd_write_reg(0x2b, &window, sizeof(window));
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lcd_write_reg(0x2c, NULL, 0);
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imx233_lcdif_wait_ready();
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imx233_lcdif_set_data_swizzle(3);
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imx233_lcdif_set_word_length(8);
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/* there are two cases here:
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* - either width = LCD_WIDTH and we can directly memcopy a part of lcd_framebuffer to FRAME
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* and send it
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* - either width != LCD_WIDTH and we have to build a contiguous copy of the rectangular area
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* into FRAME before sending it (which is slower and doesn't use the hardware)
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* In all cases, FRAME just acts as a temporary buffer.
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* NOTE It's more interesting to do a copy to FRAME in all cases since in system mode
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* the clock runs at 24MHz which provides barely 10MB/s bandwidth compared to >100MB/s
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* for memcopy operations
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*/
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if(w == LCD_WIDTH)
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{
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memcpy((void *)FRAME, FBADDR(x,y), w * h * sizeof(fb_data));
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}
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else
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{
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for(int i = 0; i < h; i++)
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memcpy((fb_data *)FRAME + i * w, FBADDR(x,y + i), w * sizeof(fb_data));
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}
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/* WARNING The LCDIF has a limitation on the vertical count ! In 16-bit packed mode
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* (which we used, ie 16-bit per pixel, 2 pixels per 32-bit words), the v_count
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* field must be a multiple of 2. Furthermore, it seems the lcd controller doesn't
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* really like when both w and h are even, probably because the writes to the GRAM
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* are done on several words and the controller requires dummy writes.
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* The workaround is to always make sure that we send a number of pixels which is
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* a multiple of 4 so that both the lcdif and the controller are happy. If any
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* of w or h is odd, we will send a copy of the first pixels as dummy writes. We will
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* send at most 3 bytes. We then send (w * h + 3) / 4 x 4 bytes.
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*/
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if(w % 2 == 1 || h % 2 == 1)
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{
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/* copy three pixel after the last one */
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for(int i = 0; i < 3; i++)
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*((fb_data *)FRAME + w * h + i) = *((fb_data *)FRAME + i);
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/* WARNING we need to update w and h to reflect the pixel count BUT it
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* has no relation to w * h (it can even be 2 * prime). Hopefully, w <= 240 and
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* h <= 320 so w * h <= 76800 and (w * h + 3) / 4 <= 38400 which fits into
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* a 16-bit integer (horizontal count). */
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h = (w * h + 3) / 4;
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w = 4;
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}
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imx233_lcdif_dma_send((void *)FRAME_PHYS_ADDR, w * 2, h);
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}
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