diff options
Diffstat (limited to 'firmware/target/arm/sandisk')
| -rw-r--r-- | firmware/target/arm/sandisk/sansa-c200/lcd-as-c200.S | 243 | ||||
| -rw-r--r-- | firmware/target/arm/sandisk/sansa-c200/lcd-c200.c | 49 |
2 files changed, 284 insertions, 8 deletions
diff --git a/firmware/target/arm/sandisk/sansa-c200/lcd-as-c200.S b/firmware/target/arm/sandisk/sansa-c200/lcd-as-c200.S new file mode 100644 index 0000000000..9b0cd75bae --- /dev/null +++ b/firmware/target/arm/sandisk/sansa-c200/lcd-as-c200.S @@ -0,0 +1,243 @@ +/*************************************************************************** + * __________ __ ___. + * Open \______ \ ____ ____ | | _\_ |__ _______ ___ + * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / + * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < + * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ + * \/ \/ \/ \/ \/ + * $Id$ + * + * Copyright (C) 2007 by Jens Arnold + * Heavily based on lcd-as-memframe.c by Michael Sevakis + * + * All files in this archive are subject to the GNU General Public License. + * See the file COPYING in the source tree root for full license agreement. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + ****************************************************************************/ + +#include "config.h" +#include "cpu.h" + +/**************************************************************************** + * void lcd_write_yuv_420_lines(unsigned char const * const src[3], + * int width, + * int stride); + * + * |R| |1.000000 -0.000001 1.402000| |Y'| + * |G| = |1.000000 -0.334136 -0.714136| |Pb| + * |B| |1.000000 1.772000 0.000000| |Pr| + * Scaled, normalized, rounded and tweaked to yield RGB 565: + * |R| |74 0 101| |Y' - 16| >> 9 + * |G| = |74 -24 -51| |Cb - 128| >> 8 + * |B| |74 128 0| |Cr - 128| >> 9 + * + * Write four RGB565 pixels in the following order on each loop: + * 1 3 + > down + * 2 4 \/ left + */ + .section .icode, "ax", %progbits + .align 2 + .global lcd_write_yuv420_lines + .type lcd_write_yuv420_lines, %function +lcd_write_yuv420_lines: + @ r0 = yuv_src + @ r1 = width + @ r2 = stride + stmfd sp!, { r4-r12 } @ save non-scratch + ldmia r0, { r4, r5, r6 } @ r4 = yuv_src[0] = Y'_p + @ r5 = yuv_src[1] = Cb_p + @ r6 = yuv_src[2] = Cr_p + @ r0 = scratch + sub r2, r2, #1 @ + mov r3, #0x70000000 @ + orr r3, r3, #0x3000 @ r3 = LCD1_BASE +10: @ loop line @ + ldrb r7, [r4], #1 @ r7 = *Y'_p++; + ldrb r8, [r5], #1 @ r8 = *Cb_p++; + ldrb r9, [r6], #1 @ r9 = *Cr_p++; + @ + sub r7, r7, #16 @ r7 = Y = (Y' - 16)*74 + add r12, r7, r7, asl #2 @ actually (Y' - 16)*37 and shift right + add r7, r12, r7, asl #5 @ by one less when adding - same for all + @ + sub r8, r8, #128 @ Cb -= 128 + sub r9, r9, #128 @ Cr -= 128 + @ + add r10, r9, r9, asl #1 @ r10 = Cr*51 + Cb*24 + add r10, r10, r10, asl #4 @ + add r10, r10, r8, asl #3 @ + add r10, r10, r8, asl #4 @ + @ + add r11, r9, r9, asl #2 @ r9 = Cr*101 + add r11, r11, r9, asl #5 @ + add r9, r11, r9, asl #6 @ + @ + add r8, r8, #2 @ r8 = bu = (Cb*128 + 128) >> 8 + mov r8, r8, asr #2 @ + add r9, r9, #256 @ r9 = rv = (r9 + 256) >> 9 + mov r9, r9, asr #9 @ + rsb r10, r10, #128 @ r10 = guv = (-r10 + 128) >> 8 + mov r10, r10, asr #8 @ + @ compute R, G, and B + add r0, r8, r7, asr #8 @ r0 = b = (Y >> 9) + bu + add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv + add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv + @ + orr r12, r0, r11 @ check if clamping is needed... + orr r12, r12, r7, asr #1 @ ...at all + cmp r12, #31 @ + bls 15f @ no clamp @ + cmp r0, #31 @ clamp b + mvnhi r0, r0, asr #31 @ + andhi r0, r0, #31 @ + cmp r11, #31 @ clamp r + mvnhi r11, r11, asr #31 @ + andhi r11, r11, #31 @ + cmp r7, #63 @ clamp g + mvnhi r7, r7, asr #31 @ + andhi r7, r7, #63 @ +15: @ no clamp @ + @ + ldrb r12, [r4, r2] @ r12 = Y' = *(Y'_p + stride) + @ + mov r11, r11, lsl #3 @ + orr r11, r11, r7, lsr #3 @ r11 = (r << 3) | (g >> 3) + orr r0, r0, r7, lsl #5 @ r0 = (g << 5) | b +1: @ busy @ + ldr r7, [r3] @ r7 = LCD1_BASE + tst r7, #LCD1_BUSY_MASK @ bridge busy? + bne 1b @ + str r11, [r3, #0x10] @ send MSB +1: @busy @ + ldr r7, [r3] @ r7 = LCD1_BASE + tst r7, #LCD1_BUSY_MASK @ bridge busy? + bne 1b @ + str r0, [r3, #0x10] @ send LSB + @ + sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 + add r12, r7, r7, asl #2 @ + add r7, r12, r7, asl #5 @ + @ compute R, G, and B + add r0, r8, r7, asr #8 @ r0 = b = (Y >> 9) + bu + add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv + add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv + @ + orr r12, r0, r11 @ check if clamping is needed... + orr r12, r12, r7, asr #1 @ ...at all + cmp r12, #31 @ + bls 15f @ no clamp @ + cmp r0, #31 @ clamp b + mvnhi r0, r0, asr #31 @ + andhi r0, r0, #31 @ + cmp r11, #31 @ clamp r + mvnhi r11, r11, asr #31 @ + andhi r11, r11, #31 @ + cmp r7, #63 @ clamp g + mvnhi r7, r7, asr #31 @ + andhi r7, r7, #63 @ +15: @ no clamp @ + @ + ldrb r12, [r4], #1 @ r12 = Y' = *(Y'_p++) + @ + mov r11, r11, lsl #3 @ + orr r11, r11, r7, lsr #3 @ r11 = (r << 3) | (g >> 3) + orr r0, r0, r7, lsl #5 @ r0 = (g << 5) | b +1: @ busy @ + ldr r7, [r3] @ r7 = LCD1_BASE + tst r7, #LCD1_BUSY_MASK @ bridge busy? + bne 1b @ + str r11, [r3, #0x10] @ send MSB +1: @ busy @ + ldr r7, [r3] @ r7 = LCD1_BASE + tst r7, #LCD1_BUSY_MASK @ bridge busy? + bne 1b @ + str r0, [r3, #0x10] @ send LSB + @ + sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 + add r12, r7, r7, asl #2 @ + add r7, r12, r7, asl #5 @ + @ compute R, G, and B + add r0, r8, r7, asr #8 @ r0 = b = (Y >> 9) + bu + add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv + add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv + @ + orr r12, r0, r11 @ check if clamping is needed... + orr r12, r12, r7, asr #1 @ ...at all + cmp r12, #31 @ + bls 15f @ no clamp @ + cmp r0, #31 @ clamp b + mvnhi r0, r0, asr #31 @ + andhi r0, r0, #31 @ + cmp r11, #31 @ clamp r + mvnhi r11, r11, asr #31 @ + andhi r11, r11, #31 @ + cmp r7, #63 @ clamp g + mvnhi r7, r7, asr #31 @ + andhi r7, r7, #63 @ +15: @ no clamp @ + @ + ldrb r12, [r4, r2] @ r12 = Y' = *(Y'_p + stride) + @ + @ + mov r11, r11, lsl #3 @ + orr r11, r11, r7, lsr #3 @ r11 = (r << 3) | (g >> 3) + orr r0, r0, r7, lsl #5 @ r0 = (g << 5) | b +1: @ busy @ + ldr r7, [r3] @ r7 = LCD1_BASE + tst r7, #LCD1_BUSY_MASK @ bridge busy? + bne 1b @ + str r11, [r3, #0x10] @ send MSB +1: @ busy @ + ldr r7, [r3] @ r7 = LCD1_BASE + tst r7, #LCD1_BUSY_MASK @ bridge busy? + bne 1b @ + str r0, [r3, #0x10] @ send LSB + @ + sub r7, r12, #16 @ r7 = Y = (Y' - 16)*74 + add r12, r7, r7, asl #2 @ + add r7, r12, r7, asl #5 @ + @ compute R, G, and B + add r0, r8, r7, asr #8 @ r0 = b = (Y >> 9) + bu + add r11, r9, r7, asr #8 @ r11 = r = (Y >> 9) + rv + add r7, r10, r7, asr #7 @ r7 = g = (Y >> 8) + guv + @ + orr r12, r0, r11 @ check if clamping is needed... + orr r12, r12, r7, asr #1 @ ...at all + cmp r12, #31 @ + bls 15f @ no clamp @ + cmp r0, #31 @ clamp b + mvnhi r0, r0, asr #31 @ + andhi r0, r0, #31 @ + cmp r11, #31 @ clamp r + mvnhi r11, r11, asr #31 @ + andhi r11, r11, #31 @ + cmp r7, #63 @ clamp g + mvnhi r7, r7, asr #31 @ + andhi r7, r7, #63 @ +15: @ no clamp @ + @ + mov r11, r11, lsl #3 @ + orr r11, r11, r7, lsr #3 @ r11 = (r << 3) | (g >> 3) + orr r0, r0, r7, lsl #5 @ r0 = (g << 5) | b +1: @ busy @ + ldr r7, [r3] @ r7 = LCD1_BASE + tst r7, #LCD1_BUSY_MASK @ bridge busy? + bne 1b @ + str r11, [r3, #0x10] @ send MSB +1: @ busy @ + ldr r7, [r3] @ r7 = LCD1_BASE + tst r7, #LCD1_BUSY_MASK @ bridge busy? + bne 1b @ + str r0, [r3, #0x10] @ send LSB + @ + subs r1, r1, #2 @ subtract block from width + bgt 10b @ loop line @ + @ + ldmfd sp!, { r4-r12 } @ restore registers and return + bx lr @ + .ltorg @ dump constant pool + .size lcd_write_yuv420_lines, .-lcd_write_yuv420_lines + diff --git a/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c b/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c index ef336b46c0..d503fd2c9b 100644 --- a/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c +++ b/firmware/target/arm/sandisk/sansa-c200/lcd-c200.c @@ -206,19 +206,49 @@ void lcd_blit(const fb_data* data, int x, int by, int width, (void)stride; } +/* Line write helper function for lcd_yuv_blit. Write two lines of yuv420. */ +extern void lcd_write_yuv420_lines(unsigned char const * const src[3], + int width, + int stride); /* Performance function to blit a YUV bitmap directly to the LCD */ void lcd_yuv_blit(unsigned char * const src[3], int src_x, int src_y, int stride, int x, int y, int width, int height) { - (void)src; - (void)src_x; - (void)src_y; - (void)stride; - (void)x; - (void)y; - (void)width; - (void)height; + unsigned char const * yuv_src[3]; + off_t z; + + /* Sorry, but width and height must be >= 2 or else */ + width &= ~1; + height >>= 1; + + y += 0x1a; + + z = stride*src_y; + yuv_src[0] = src[0] + z + src_x; + yuv_src[1] = src[1] + (z >> 2) + (src_x >> 1); + yuv_src[2] = src[2] + (yuv_src[1] - src[1]); + + lcd_send_command(R_ENTRY_MODE); + lcd_send_command(0x80); + + lcd_send_command(R_X_ADDR_AREA); + lcd_send_command(x); + lcd_send_command(x + width - 1); + + do + { + lcd_send_command(R_Y_ADDR_AREA); + lcd_send_command(y); + lcd_send_command(y + 1); + + lcd_write_yuv420_lines(yuv_src, width, stride); + yuv_src[0] += stride << 1; /* Skip down two luma lines */ + yuv_src[1] += stride >> 1; /* Skip down one chroma line */ + yuv_src[2] += stride >> 1; + y += 2; + } + while (--height > 0); } /* Update the display. @@ -239,6 +269,9 @@ void lcd_update_rect(int x0, int y0, int width, int height) if ((x1 <= 0) || (y1 <= 0)) return; + lcd_send_command(R_ENTRY_MODE); + lcd_send_command(0x82); + if(y1 >= LCD_HEIGHT) y1 = LCD_HEIGHT - 1; |