From 83aded979f074b6d48cd05db8f7f991e51372e38 Mon Sep 17 00:00:00 2001 From: Jens Arnold Date: Thu, 2 Nov 2006 20:50:50 +0000 Subject: H300: (1) Use DMA for LCD updates, with auto-aligned line reads. Speeds up LCD updates by ~ 75% at 11MHz and 45MHz. Only ~ 11% speedup at 124MHz due to (2). (2) Less aggressive LCD transfer timing at 124MHz. With the previous timing, slightly corrupted display contents was reported, and with DMA transfers at least 4 waitstates are needed to make updates work at all. * A table in system-iriver.c shows settings for all integer multiples of the base clock frequency (info for developers, not yet complete). git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11418 a1c6a512-1295-4272-9138-f99709370657 --- firmware/drivers/lcd-h300.c | 48 ++++++++--- firmware/export/mcf5249.h | 1 + firmware/target/coldfire/iriver/h300/lcd-as-h300.S | 96 ---------------------- firmware/target/coldfire/iriver/system-iriver.c | 24 +++++- 4 files changed, 59 insertions(+), 110 deletions(-) (limited to 'firmware') diff --git a/firmware/drivers/lcd-h300.c b/firmware/drivers/lcd-h300.c index 41d2d11509..b7865fa7c5 100644 --- a/firmware/drivers/lcd-h300.c +++ b/firmware/drivers/lcd-h300.c @@ -368,7 +368,16 @@ void lcd_update(void) /* Copy display bitmap to hardware */ lcd_write_reg(R_RAM_ADDR_SET, xoffset << 8); lcd_begin_write_gram(); - lcd_write_data((unsigned short *)lcd_framebuffer, LCD_WIDTH*LCD_HEIGHT); + + DAR3 = 0xf0000002; + SAR3 = (unsigned long)lcd_framebuffer; + BCR3 = LCD_WIDTH*LCD_HEIGHT*2; + DCR3 = DMA_AA | DMA_BWC(1) + | DMA_SINC | DMA_SSIZE(DMA_SIZE_LINE) + | DMA_DSIZE(DMA_SIZE_WORD) | DMA_START; + + while (!(DSR3 & 1)); + DSR3 = 1; } } @@ -376,26 +385,39 @@ void lcd_update(void) void lcd_update_rect(int, int, int, int) ICODE_ATTR; void lcd_update_rect(int x, int y, int width, int height) { + unsigned long dma_addr; + if(display_on) { - int ymax = y + height - 1; if(x + width > LCD_WIDTH) width = LCD_WIDTH - x; - if (width <= 0) - return; /* nothing left to do, 0 is harmful to lcd_write_data() */ - if(ymax >= LCD_HEIGHT) - ymax = LCD_HEIGHT-1; + if(width <= 0) /* nothing to do */ + return; + if(y + height > LCD_HEIGHT) + height = LCD_HEIGHT - y; - /* set update window */ + /* set update window */ lcd_write_reg(R_VERT_RAM_ADDR_POS,((x+xoffset+width-1) << 8) | (x+xoffset)); lcd_write_reg(R_RAM_ADDR_SET, ((x+xoffset) << 8) | y); - lcd_begin_write_gram(); + lcd_begin_write_gram(); + + DAR3 = 0xf0000002; + dma_addr = (unsigned long)&lcd_framebuffer[y][x]; + width *= 2; - /* Copy specified rectangle bitmap to hardware */ - for (; y <= ymax; y++) - { - lcd_write_data ((unsigned short *)&lcd_framebuffer[y][x], width); - } + for (; height > 0; height--) + { + SAR3 = dma_addr; + BCR3 = width; + DCR3 = DMA_AA | DMA_BWC(1) + | DMA_SINC | DMA_SSIZE(DMA_SIZE_LINE) + | DMA_DSIZE(DMA_SIZE_WORD) | DMA_START; + + dma_addr += LCD_WIDTH*2; + + while (!(DSR3 & 1)); + DSR3 = 1; + } } } diff --git a/firmware/export/mcf5249.h b/firmware/export/mcf5249.h index 406e0b1c1b..87c4ae75b3 100644 --- a/firmware/export/mcf5249.h +++ b/firmware/export/mcf5249.h @@ -251,6 +251,7 @@ #define DMA_EEXT (1 << 30) /* Enable peripherial request */ #define DMA_CS (1 << 29) /* Cycle Steal */ #define DMA_AA (1 << 28) /* Auto-Align */ +#define DMA_BWC(x) (((x)&7) << 25) /* Bandwidth control */ #define DMA_SINC (1 << 22) /* Source Increment */ #define DMA_SSIZE(x) (((x)&3) << 20) /* Size of source data */ #define DMA_DINC (1 << 19) /* Destination Increment */ diff --git a/firmware/target/coldfire/iriver/h300/lcd-as-h300.S b/firmware/target/coldfire/iriver/h300/lcd-as-h300.S index c6c1c76136..ae55dfb224 100755 --- a/firmware/target/coldfire/iriver/h300/lcd-as-h300.S +++ b/firmware/target/coldfire/iriver/h300/lcd-as-h300.S @@ -22,102 +22,6 @@ .section .icode, "ax", @progbits - .align 2 - .global lcd_write_data - .type lcd_write_data, @function - -lcd_write_data: - move.l (4, %sp), %a0 /* data pointer */ - move.l (8, %sp), %d0 /* length in words */ - add.l %d0, %d0 /* words -> bytes */ - add.l %a0, %d0 /* -> end address */ - lea.l 0xf0000002, %a1 /* LCD data port */ - - move.l %a0, %d1 - btst.l #1, %d1 /* already longword aligned? */ - beq.s .word1_end /* yes: skip initial word copy */ - - move.w (%a0)+, (%a1) /* transfer initial word */ - -.word1_end: /* now longword aligned */ - moveq.l #28, %d1 - add.l %a0, %d1 - and.l #0xFFFFFFF0,%d1 /* %d1 = first line bound + 16 */ - cmp.l %d1, %d0 /* at least one full line to send? */ - blo.s .long2_start /* no: skip to trailing longword handling */ - - lea.l (-16, %sp), %sp /* free up some registers */ - movem.l %d2-%d4/%a2, (%sp) - - subq.l #8, %d1 - subq.l #8, %d1 /* %d1 = first line bound */ - - cmp.l %a0, %d1 /* any leading longwords? */ - bls.s .long1_end /* no: skip leading long loop */ - -.long1_loop: - move.l (%a0)+, %d2 /* read longword */ - swap %d2 /* send data to LCD in correct order...*/ - move.w %d2, (%a1) - swap %d2 - move.w %d2, (%a1) - cmp.l %a0, %d1 /* run %a0 up to first line bound */ - bhi.s .long1_loop - -.long1_end: - move.l %d0, %a2 - lea.l (-14, %a2), %a2 /* %a2 = end address - 14 (one line/pass) */ - - /* burst-optimised line transfers */ -.line_loop: - movem.l (%a0), %d1-%d4 /* burst-read line */ - lea.l (16, %a0), %a0 /* increment address */ - swap %d1 /* send data to LCD in correct order... */ - move.w %d1, (%a1) - swap %d1 - move.w %d1, (%a1) - swap %d2 - move.w %d2, (%a1) - swap %d2 - move.w %d2, (%a1) - swap %d3 - move.w %d3, (%a1) - swap %d3 - move.w %d3, (%a1) - swap %d4 - move.w %d4, (%a1) - swap %d4 - move.w %d4, (%a1) - cmp.l %a0, %a2 /* run %a0 up to last line bound */ - bhi.s .line_loop - - movem.l (%sp), %d2-%d4/%a2 - lea.l (16, %sp), %sp /* restore registers */ - -.long2_start: - subq.l #2, %d0 /* account for handling 2 words per loop */ - cmp.l %a0, %d0 /* any (trailing longwords? */ - bls.s .long2_end /* no: skip trailing longword loop */ - -.long2_loop: - move.l (%a0)+, %d1 /* read longword */ - swap %d1 /* send data to LCD in correct order */ - move.w %d1, (%a1) - swap %d1 - move.w %d1, (%a1) - cmp.l %a0, %d0 /* run %a0 up to last long bound */ - bhi.s .long2_loop - -.long2_end: - blo.s .word2_end /* no final word: skip */ - move.w (%a0)+, (%a1) /* transfer final word */ - -.word2_end: - rts -.lcd_write_data_end: - .size lcd_write_data, .lcd_write_data_end - lcd_write_data - - /* lcd_write_yuv420_lines(), based on lcd-as-x5.S * * See http://en.wikipedia.org/wiki/YCbCr diff --git a/firmware/target/coldfire/iriver/system-iriver.c b/firmware/target/coldfire/iriver/system-iriver.c index 5f404fb8cf..3517788641 100644 --- a/firmware/target/coldfire/iriver/system-iriver.c +++ b/firmware/target/coldfire/iriver/system-iriver.c @@ -24,6 +24,28 @@ #include "timer.h" #include "pcf50606.h" +/* Settings for all possible clock frequencies (with properly working timers) + * + * xxx_REFRESH_TIMER below + * system.h, CPUFREQ_xxx_MULT | + * | | + * V V + * Refreshtim. IDECONFIG1/IDECONFIG2 + * CPUCLK/Hz MULT PLLCR 16MB 32MB CSCR0 CSCR1 CSCR3 CS2Pre CS2Post CS2Wait + * --------------------------------------------------------------------------------------- + * 11289600 1 0x10c00200 4 1 0x0180 0x0180 0x0180 1 0 0 + * 22579200 2 0x15c4e005 10 4 0x0180 0x0180 0x0180 1 0 0 + * 33868800 3 0x13c46005 15 7 0x0180 0x0180 0x0180 1 0 0 + * 45158400 4 0x15c4e001 21 10 0x0580 0x0180 0x0580 1 0 0 + * 56448000 5 0x12c4e005 26 12 0x0580 0x0980 + * 67737600 6 0x13c46001 32 15 0x0980 0x0d80 + * 79027200 7 0x13c52001 37 18 0x0980 0x1180 + * 90316800 8 0x13c5e001 43 21 0x0d80 0x1580 + * 101606400 9 0x11c48005 48 23 0x0d80 0x1980 + * 112896000 10 0x11c4e005 54 26 0x1180 0x1d80 + * 124185600 11 0x11c56005 59 29 0x1180 0x1180 0x2180 2 1 2 + */ + #if MEM < 32 #define MAX_REFRESH_TIMER 59 #define NORMAL_REFRESH_TIMER 21 @@ -61,7 +83,7 @@ void set_cpu_frequency(long frequency) RECALC_DELAYS(CPUFREQ_MAX); PLLCR = 0x11c56005; CSCR0 = 0x00001180; /* Flash: 4 wait states */ - CSCR1 = 0x00000980; /* LCD: 2 wait states */ + CSCR1 = 0x00001580; /* LCD: 5 wait states */ #if CONFIG_USBOTG == USBOTG_ISP1362 CSCR3 = 0x00002180; /* USBOTG: 8 wait states */ #endif -- cgit v1.2.3