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Diffstat (limited to 'Source/DirectFB/gfxdrivers/sh772x/README.sh7722')
| -rwxr-xr-x | Source/DirectFB/gfxdrivers/sh772x/README.sh7722 | 172 |
1 files changed, 172 insertions, 0 deletions
diff --git a/Source/DirectFB/gfxdrivers/sh772x/README.sh7722 b/Source/DirectFB/gfxdrivers/sh772x/README.sh7722 new file mode 100755 index 0000000..45bbf87 --- /dev/null +++ b/Source/DirectFB/gfxdrivers/sh772x/README.sh7722 @@ -0,0 +1,172 @@ +Renesas SH7722 graphics driver +============================== + +This driver supports the SH7722 SoC from Renesas Solutions Corp. controlling +- LCDC (LCD Controller) for display +- BEU (Blit Engine Unit) for blending of planes +- TDG (2D Graphics) for accelerated operations + +It's using a kernel device called sh7722gfx which mainly does interrupt handling. + +The 2D Graphics unit supports display lists in RAM and reads them via DMA. These +lists consist of double word entries, first word designates a register, second +word contains the data to write. Once a list has been completely processed, the +hardware generates an interrupt to start the next list. + +The kernel module allocates a ring buffer for usage as a display list. The user +space prepares a block of commands and puts it into the ring buffer. If the hardware +is idle, it's started directly from user space. When a DMA completion interrupt +is received, the next block of commands is started from kernel space. If the +hardware is still running the previous block, new commands are appended to the +next one. The driver is designed to run without any locking or system calls. Only +a few interrupts happen over time depending on the operations. The hardware is not +getting idle, while commands are being sent to keep it busy. There's just a minimal +gap which is the interrupt handler setting the new start address and kicking the +hardware again. + +To build the kernel module use "make -f Makefile.kernel". You might want to set +the variables KERNEL_SOURCE, KERNEL_BUILD (if != KERNEL_SOURCE), KERNEL_VERSION +and DESTDIR. + +To run the driver you need the DevMem system module using the directfbrc.sh7722 +file (renamed to directfbrc in $prefix/etc). + + +Performance (as of 2007-09-21, multi app, 127.79 BogoMIPS) +---------------------------------------------------------- + +Only 14% CPU load with df_andi running 800x480 at 28.1 fps :) + +Benchmarking with 256x256 in 16bit mode... (16bit) + CPU load +Anti-aliased Text 3.020 secs ( 41.721 KChars/sec) [100%] +Anti-aliased Text (blend) 3.328 secs ( 10.817 KChars/sec) [100%] +Fill Rectangle 5.549 secs (* 69.681 MPixel/sec) [ 3%] +Fill Rectangle (blend) 11.873 secs (* 22.079 MPixel/sec) [ 1%] +Fill Rectangles [10] 9.384 secs (* 69.838 MPixel/sec) [ 0%] +Fill Rectangles [10] (blend) 14.836 secs (* 22.086 MPixel/sec) [ 0%] +Fill Triangles 3.024 secs (+ 50.929 MPixel/sec) [ 40%] +Fill Triangles (blend) 3.064 secs (+ 20.319 MPixel/sec) [ 8%] +Draw Rectangle 3.284 secs (* 6.942 KRects/sec) [ 26%] +Draw Rectangle (blend) 3.302 secs (* 6.268 KRects/sec) [ 25%] +Draw Lines [10] 3.238 secs (* 28.103 KLines/sec) [ 20%] +Draw Lines [10] (blend) 3.198 secs (* 27.829 KLines/sec) [ 19%] +Fill Spans 3.092 secs (* 61.466 MPixel/sec) [ 33%] +Fill Spans (blend) 3.094 secs (* 21.181 MPixel/sec) [ 11%] +Blit 10.436 secs (* 30.143 MPixel/sec) [ 2%] +Blit colorkeyed 9.333 secs (* 32.301 MPixel/sec) [ 2%] +Blit destination colorkeyed 3.763 secs ( 6.966 MPixel/sec) [ 99%] +Blit with format conversion 13.369 secs (* 22.549 MPixel/sec) [ 1%] +Blit with colorizing 4.419 secs ( 2.966 MPixel/sec) [100%] +Blit from 32bit (blend) 21.973 secs (* 13.123 MPixel/sec) [ 1%] +Blit from 32bit (blend) with colorizing 5.129 secs ( 1.277 MPixel/sec) [100%] +Stretch Blit 10.271 secs (* 33.463 MPixel/sec) [ 3%] +Stretch Blit colorkeyed 7.895 secs (* 35.159 MPixel/sec) [ 3%] + +(*) SH7722/BLT: 940 starts, 940 done, 940 interrupts, 43 wait_idle, 780 wait_next, 89 idle +(*) SH7722/BLT: 24700744 words, 26277 words/start, 277536 words/idle, 10 starts/idle + +* = accelerated ++ = half way accelerated + + +Performance (as of 2007-09-25, multi app, 127.79 BogoMIPS) +---------------------------------------------------------- + +Only 13% CPU load with df_andi running 800x480 at 28.8 fps :) +Only 46% CPU load with ClanBomber2 running 800x600 at 48 fps :) + +Benchmarking with 256x256 in 16bit mode... (16bit) + CPU load +Anti-aliased Text 3.057 secs (* 98.920 KChars/sec) [ 47%] ! +Anti-aliased Text (blend) 3.298 secs ( 10.915 KChars/sec) [100%] +Fill Rectangle 5.732 secs (* 69.743 MPixel/sec) [ 3%] +Fill Rectangle (blend) 11.571 secs (* 22.088 MPixel/sec) [ 1%] +Fill Rectangles [10] 9.384 secs (* 69.838 MPixel/sec) [ 0%] +Fill Rectangles [10] (blend) 14.836 secs (* 22.086 MPixel/sec) [ 0%] +Fill Triangles 4.176 secs (* 61.989 MPixel/sec) [ 6%] ! +Fill Triangles (blend) 8.132 secs (* 21.759 MPixel/sec) [ 2%] ! +Draw Rectangle 3.216 secs (* 6.965 KRects/sec) [ 26%] +Draw Rectangle (blend) 3.290 secs (* 6.322 KRects/sec) [ 22%] +Draw Lines [10] 3.216 secs (* 28.296 KLines/sec) [ 14%] +Draw Lines [10] (blend) 3.196 secs (* 28.160 KLines/sec) [ 14%] +Fill Spans 3.086 secs (* 61.586 MPixel/sec) [ 25%] +Fill Spans (blend) 3.092 secs (* 21.195 MPixel/sec) [ 7%] +Blit 8.692 secs (* 30.159 MPixel/sec) [ 2%] +Blit 180 4.783 secs (* 30.144 MPixel/sec) [ 2%] ! +Blit colorkeyed 11.965 secs (* 32.316 MPixel/sec) [ 2%] +Blit destination colorkeyed 3.795 secs ( 6.907 MPixel/sec) [ 99%] +Blit with format conversion 9.039 secs (* 22.476 MPixel/sec) [ 1%] +Blit with colorizing 4.414 secs ( 2.969 MPixel/sec) [100%] +Blit from 32bit (blend) 23.375 secs (* 13.177 MPixel/sec) [ 1%] +Blit from 32bit (blend) with colorizing 5.137 secs ( 1.275 MPixel/sec) [100%] +Stretch Blit 8.976 secs (* 33.495 MPixel/sec) [ 2%] +Stretch Blit colorkeyed 9.728 secs (* 35.226 MPixel/sec) [ 2%] + +(*) SH7722/BLT: 521 starts, 521 done, 521 interrupts, 45 wait_idle, 363 wait_next, 90 idle +(*) SH7722/BLT: 11511104 words, 22094 words/start, 127901 words/idle, 5 starts/idle + +* = accelerated +! = updated + + +Statistics +---------- + +The statistics at the end are more valuable when looking at one case at a time: + +Fill Rectangle 5.834 secs (* 69.647 MPixel/sec) [ 4%] + +(*) SH7722/BLT: 16 starts, 16 done, 16 interrupts, 4 wait_idle, 2 wait_next, 11 idle +(*) SH7722/BLT: 74840 words, 4677 words/start, 6803 words/idle, 1 starts/idle + +This means that while the FillRectangle() benchmark was running, the hardware +didn't get idle, which is obvious when running the benchmark for just 10 ms: + +Fill Rectangle 0.191 secs (* 68.624 MPixel/sec) [ 10%] + +(*) SH7722/BLT: 13 starts, 13 done, 13 interrupts, 4 wait_idle, 0 wait_next, 11 idle +(*) SH7722/BLT: 2840 words, 218 words/start, 258 words/idle, 1 starts/idle + +See? The same number of times becoming idle, but a few less interrupts. Don't +worry about the 191 ms the benchmark needed to complete, after 10 ms of stuffing +the display list, we need to wait until the hardware is done before measuring +the time it took and calculating the result. + +Here's FillSpans() which as opposed to FillRectangle() does a lot of small commands: + +Fill Spans 3.028 secs (* 61.467 MPixel/sec) [ 34%] + +(*) SH7722/BLT: 245 starts, 245 done, 245 interrupts, 3 wait_idle, 185 wait_next, 22 idle +(*) SH7722/BLT: 5828128 words, 23788 words/start, 264914 words/idle, 11 starts/idle + + +Example kernel log (debug mode) +------------------------------- + +0.549.014 - sh7722_reset : Resetting hardware... +0.549.046 - sh7722_reset : Initializing shared area... +0.549.748 - sh7722_reset : Clearing interrupts... +0.549.770 - sh7722_reset : Ready ( idle, hw 0- 0, next 0- 0, invalid, HC 0000000, INT 000000) +0.568.700 - sh7722_wait : Waiting..... (running, hw 0- 54, next 56- 56, invalid, HC 1010111, INT 000000) +0.573.339 - sh7722_tdg_irq : -Interrupt (running, hw 0- 54, next 56- 56, invalid, HC 0000000, INT 100100) +0.573.397 - sh7722_tdg_irq : '-> Idle. (running, hw 0- 54, next 56- 56, invalid, HC 0000000, INT 000000) +0.573.480 - sh7722_wait : ........done ( idle, hw 0- 54, next 56- 56, invalid, HC 0000000, INT 000000) +0.583.575 - sh7722_wait : Waiting..... (running, hw 56- 78, next 80- 80, invalid, HC 1010111, INT 000000) +0.588.414 - sh7722_tdg_irq : -Interrupt (running, hw 56- 78, next 80- 80, invalid, HC 0000000, INT 100100) +0.588.470 - sh7722_tdg_irq : '-> Idle. (running, hw 56- 78, next 80- 80, invalid, HC 0000000, INT 000000) +0.588.544 - sh7722_wait : ........done ( idle, hw 56- 78, next 80- 80, invalid, HC 0000000, INT 000000) +0.601.336 - sh7722_tdg_irq : -Interrupt (running, hw 80- 102, next 104- 104, invalid, HC 0000000, INT 100100) +0.601.420 - sh7722_tdg_irq : '-> Idle. (running, hw 80- 102, next 104- 104, invalid, HC 0000000, INT 000000) +0.700.117 - sh7722_tdg_irq : -Interrupt (running, hw 104- 124, next 128- 128, invalid, HC 0000000, INT 100100) +0.700.205 - sh7722_tdg_irq : '-> Idle. (running, hw 104- 124, next 128- 128, invalid, HC 0000000, INT 000000) +3.115.419 - sh7722_tdg_irq : -Interrupt (running, hw 128- 220, next 224- 224, invalid, HC 0000000, INT 100100) +3.115.506 - sh7722_tdg_irq : '-> Idle. (running, hw 128- 220, next 224- 224, invalid, HC 0000000, INT 000000) +3.151.700 - sh7722_tdg_irq : -Interrupt (running, hw 224- 324, next 328- 328, invalid, HC 0000000, INT 100100) +3.151.788 - sh7722_tdg_irq : '-> Idle. (running, hw 224- 324, next 328- 328, invalid, HC 0000000, INT 000000) +3.159.160 - sh7722_wait : Waiting..... (running, hw 328- 444, next 448-12994, valid, HC 1010111, INT 000100) +3.161.783 - sh7722_tdg_irq : -Interrupt (running, hw 328- 444, next 448-12994, valid, HC 0000000, INT 100100) +3.161.839 - sh7722_tdg_irq : '-> Start! (running, hw 448-12994, next 12996-12996, invalid, HC 0000000, INT 000000) +4.316.367 - sh7722_tdg_irq : -Interrupt (running, hw 448-12994, next 12996-12996, invalid, HC 0000000, INT 100100) +4.316.434 - sh7722_tdg_irq : '-> Idle. (running, hw 448-12994, next 12996-12996, invalid, HC 0000000, INT 000000) +4.316.505 - sh7722_wait : ........done ( idle, hw 448-12994, next 12996-12996, invalid, HC 0000000, INT 000000) |