From 2acf8db3e14e8c81f27cb0cea5b366678693c7b3 Mon Sep 17 00:00:00 2001 From: Tomasz Moń Date: Mon, 5 Jul 2021 15:15:30 +0200 Subject: Sansa Connect: Power off LCD to save power Prevent startup screen flash by properly using AVR LCM functions. Power off LCD when not needed to improve battery runtime. Change-Id: I76e3c5c0208774f189fbc6f7d7b3c9e22c062285 --- .../tms320dm320/sansa-connect/lcd-sansaconnect.c | 117 +++++++++++++++------ 1 file changed, 83 insertions(+), 34 deletions(-) (limited to 'firmware/target/arm/tms320dm320/sansa-connect/lcd-sansaconnect.c') diff --git a/firmware/target/arm/tms320dm320/sansa-connect/lcd-sansaconnect.c b/firmware/target/arm/tms320dm320/sansa-connect/lcd-sansaconnect.c index 07be11e849..9d58fccdb3 100644 --- a/firmware/target/arm/tms320dm320/sansa-connect/lcd-sansaconnect.c +++ b/firmware/target/arm/tms320dm320/sansa-connect/lcd-sansaconnect.c @@ -29,60 +29,109 @@ #include "lcd.h" #include "lcd-target.h" #include "avr-sansaconnect.h" +#include "backlight-target.h" -extern bool lcd_on; /* lcd-memframe.c */ +/* See lcd-memframe.c */ +extern void lcd_set_active(bool active); + +static bool lcd_powered; -#if defined(HAVE_LCD_SLEEP) void lcd_sleep(void) { - if (lcd_on) + if (lcd_powered) { - lcd_on = false; + lcd_set_active(false); - avr_hid_lcm_sleep(); - sleep(HZ/20); + avr_hid_lcm_power_off(); + mdelay(100); + /* Disable OSD window */ + bitclr16(&IO_OSD_OSDWINMD0, 0x01); /* disable video encoder */ - bitclr16(&IO_VID_ENC_VMOD, 0x01); + bitclr16(&IO_VID_ENC_VMOD, VENC_VMOD_VENC); + mdelay(66); - sleep(HZ/20); + /* disable video encoder and OSD clocks */ + bitclr16(&IO_CLK_MOD1, CLK_MOD1_VENC | CLK_MOD1_OSD); - /* disable video encoder clock */ - bitclr16(&IO_CLK_MOD1, CLK_MOD1_VENC); + lcd_powered = false; } } void lcd_awake(void) { - if (!lcd_on) + if (!lcd_powered) { - lcd_on = true; + /* Enable Video Encoder and OSD clocks */ + bitset16(&IO_CLK_MOD1, CLK_MOD1_VENC | CLK_MOD1_OSD); + /* Enable OSD window */ + bitset16(&IO_OSD_OSDWINMD0, 0x01); + /* Enable video encoder */ + bitset16(&IO_VID_ENC_VMOD, VENC_VMOD_VENC); + + avr_hid_lcm_power_on(); + lcd_set_active(true); + avr_hid_lcm_wake(); - /* enable video encoder clock */ - bitset16(&IO_CLK_MOD1, CLK_MOD1_VENC); + lcd_powered = true; + send_event(LCD_EVENT_ACTIVATION, NULL); + } +} - /* enable video encoder */ - bitset16(&IO_VID_ENC_VMOD, 0x01); +void lcd_shutdown(void) +{ + backlight_hw_off(); + lcd_sleep(); +} + +void lcd_enable(bool enable) +{ + if (lcd_active() == enable) + return; + + lcd_set_active(enable); + + if (enable) + { + /* Enable Video Encoder and OSD clocks */ + bitset16(&IO_CLK_MOD1, CLK_MOD1_VENC | CLK_MOD1_OSD); + /* Enable OSD window */ + bitset16(&IO_OSD_OSDWINMD0, 0x01); + /* Enable video encoder */ + bitset16(&IO_VID_ENC_VMOD, VENC_VMOD_VENC); avr_hid_lcm_wake(); + mdelay(30); send_event(LCD_EVENT_ACTIVATION, NULL); + } + else + { + mdelay(30); + avr_hid_lcm_sleep(); + mdelay(10); - lcd_update(); + /* Disable OSD window */ + bitclr16(&IO_OSD_OSDWINMD0, 0x01); + /* disable video encoder */ + bitclr16(&IO_VID_ENC_VMOD, VENC_VMOD_VENC); + mdelay(66); + + /* disable video encoder and OSD clocks */ + bitclr16(&IO_CLK_MOD1, CLK_MOD1_VENC | CLK_MOD1_OSD); } } -#endif void lcd_init_device(void) { unsigned int addr; - + /* Disable Video Encoder clock */ bitclr16(&IO_CLK_MOD1, CLK_MOD1_VENC); /* configure GIO39, GIO34 as outputs */ IO_GIO_DIR2 &= ~((1 << 7) /* GIO39 */ | (1 << 2) /* GIO34 */); - + IO_GIO_FSEL3 = (IO_GIO_FSEL3 & ~(0x300F)) | (0x1000) /* GIO39 - FIELD_VENC */ | (0x4); /* GIO34 - PWM1 (brightness control) */ @@ -121,10 +170,9 @@ void lcd_init_device(void) IO_VID_ENC_VMOD = 0x2015; /* OF sets 0x2011 */ /* Copy Rockbox frame buffer to the second framebuffer */ + lcd_set_active(true); lcd_update(); - avr_hid_lcm_power_on(); - /* set framebuffer address - OF sets RAM start address to 0x1000000 */ addr = ((int)FRAME-CONFIG_SDRAM_START)/32; @@ -149,8 +197,9 @@ void lcd_init_device(void) /* Enable Video Encoder - RGB666, custom timing */ IO_VID_ENC_VMOD = 0x2015; + + lcd_powered = true; avr_hid_lcm_wake(); - lcd_on = true; } #ifdef LCD_USE_DMA @@ -167,14 +216,14 @@ static void dma_lcd_copy_buffer_rect(int x, int y, int width, int height) /* Set source and destination addresses */ dst = (char*)(FRAME + LCD_WIDTH*y + x); src = (char*)(FBADDR(x,y)); - + /* Flush cache to memory */ commit_dcache(); /* Addresses are relative to start of SDRAM */ src -= CONFIG_SDRAM_START; dst -= CONFIG_SDRAM_START; - + /* Enable Image Buffer clock */ bitset16(&IO_CLK_MOD1, CLK_MOD1_IMGBUF); @@ -191,7 +240,7 @@ static void dma_lcd_copy_buffer_rect(int x, int y, int width, int height) /* Set the start address of buffer */ COP_BUF_ADDR = 0x0000; - + /* Setup SDRAM stride */ COP_SDEM_LOFST = LCD_WIDTH; @@ -200,28 +249,28 @@ static void dma_lcd_copy_buffer_rect(int x, int y, int width, int height) addr = (int)src; addr >>= 1; /* Addresses are in 16-bit words */ - + /* Setup the registers to initiate the read from SDRAM */ COP_SDEM_ADDRH = addr >> 16; COP_SDEM_ADDRL = addr & 0xFFFF; - + /* Set direction and start */ COP_DMA_CTRL = 0x0001; COP_DMA_CTRL |= 0x0002; /* Wait for read to finish */ while (COP_DMA_CTRL & 0x02) {}; - + addr = (int)dst; addr >>= 1; - + COP_SDEM_ADDRH = addr >> 16; COP_SDEM_ADDRL = addr & 0xFFFF; - + /* Set direction and start transfer */ COP_DMA_CTRL = 0x0000; COP_DMA_CTRL |= 0x0002; - + /* Wait for the transfer to complete */ while (COP_DMA_CTRL & 0x02) {}; @@ -246,7 +295,7 @@ void lcd_update_rect(int x, int y, int width, int height) __attribute__ ((section(".icode"))); void lcd_update_rect(int x, int y, int width, int height) { - if (!lcd_on) + if (!lcd_active()) return; if ((width | height) < 0) @@ -270,7 +319,7 @@ void lcd_update_rect(int x, int y, int width, int height) void lcd_update(void) __attribute__ ((section(".icode"))); void lcd_update(void) { - if (!lcd_on) + if (!lcd_active()) return; lcd_update_rect(0, 0, LCD_WIDTH, LCD_HEIGHT); -- cgit v1.2.3