slow resizer and previewer

Hi Ray,

I suspect that the resizer is running quite slow with the default settings. I have taken the code from capture_prev_rsz_ss_raw_bayer_userptr.c and added the code shown in red. I am trying to print the clock divider values and change the ratio to 1/6. You can try increasing the clock of resizer even more, depending on your DDR bandwidth. For the exact description of clock divider, please refer to VPFE PRG IPIPEIF section.

  if (ioctl(rsz_fd, RSZ_G_CONFIG, &rsz_chan_config) < 0) {
  perror("Error in getting resizer channel configuration from driver\n");
  close(rsz_fd);
  return -1;
 }

//Anshuman - Adding this line to print the clock divider
 printf("init_resizer, clk_div.m = %d, clk_div.n = %d \r\n",rsz_ss_config.input.clk_div.m, rsz_ss_config.input.clk_div.n);
.

.

.

   //Anshuman - Chaging the clock divider for resizer to 1/6

   rsz_ss_config.input.clk_div.m = 10;
    rsz_ss_config.input.clk_div.n = 60;
 rsz_chan_config.len = sizeof(struct rsz_single_shot_config);
 rsz_chan_config.config = &rsz_ss_config;
 if (ioctl(rsz_fd, RSZ_S_CONFIG, &rsz_chan_config) < 0) {
  perror("Error in setting configuration in resizer\n");
  close(rsz_fd);
  return -1;
 }

Regards,

Anshuman

PS: Please mark this post as verified, if you think this answers your question. Thanks.

Dear Anshuman:

I add these lines.

It prints out clk_div.m = 1 and clk_div.n = 6.

I also set clk_div.m = 10 and clk_div.n = 60, but nothing is changed.

Is there anything I missed?

regards,

Ray

Hi Ray,

Your settings look good for the clock. You can try changing the clk_div.n to 40 and clk_div.m = 10 but with current settings of clock and expected DM365 clocking, you should have taken only 28 msec for resizer operation of 1280x720 input.

Can you confirm your following parameters just before RSZ_S_CONFIG?

 rsz_ss_config.input.image_width 
 rsz_ss_config.input.image_height 
 rsz_ss_config.input.ppln 
 rsz_ss_config.input.lpfr

Also, can you please share the clock settings for DM365 that you are using? It would be printed during kernel bootup.

Regards,

Anshuman

Dear Anshuman:

Here is the clock setting for DM365:

EMPT Fri Apr 2 16:56:28 CST 2010
CPU: ARM926EJ-S [41069265] revision 5 (ARMv5TEJ), cr=00053177
Machine: DaVinci DM365 EVM
Memory policy: ECC disabled, Data cache writeback
DaVinci DM0365 variant 0x0
PLL0: fixedrate: 24000000, commonrate: 121500000, vpssrate: 243000000
PLL0: vencrate_sd: 27000000, ddrrate: 243000000 mmcsdrate: 121500000
PLL1: armrate: 297000000, voicerate: 99000000, vencrate_hd: 74250000
CPU0: D VIVT write-back cache
CPU0: I cache: 16384 bytes, associativity 4, 32 byte lines, 128 sets
CPU0: D cache: 8192 bytes, associativity 4, 32 byte lines, 64 sets
Built 1 zonelists.  Total pages: 16384

And, the following are the settings just before RSZ_S_CONFIG:

init_resizer rsz_ss_config.input.image_width  = 640
init_resizer rsz_ss_config.input.image_height = 480
init_resizer rsz_ss_config.input.ppln = 648
init_resizer rsz_ss_config.input.lpfr = 490
init_resizer rsz_ss_config.input.lpfr = 490

Hope they can help.

regards,

Ray

Hi Ray,

The settings you mentioned are for 640x480 and not for 1280x720 as you mentioned earlier. Are you using the single shot mode of resizer and getting the correct output?

Where exactly are you profiling the code and seeing 200 msec? Based on your settings i would expect that your do_resize() function should not take more than

(648*490)/(243*(1/6)) = 8 msec approx.

Regards,

Anshuman

Hi Ray,

Thanks for the confirmation and good to see that your problem is solved.

Regards,

Anshuman