I tried to pick up a preset, better than 240 MHz.
I found it:)
https://drive.google.com/file/d/13WHC6LE9u5OFMuLL1dSbbv4zZIICWo1z/viewregister 0xC0400614 = 0x1d000201
Look at 620, I set it to 0x0 and its color changed to gray.
Without this change, it was impossible to obtain a stable reading speed (after the first write cycle in the benchmark, the speed of the first read cycle immediately fell).
Results on sd sandisk 256gb extreme pro (170mb\s) with this preset:
Play mode
Write 97.4 Read 140 mb\s https://drive.google.com/file/d/1IU_VMWSVvxCWgftdihUygrNn266wxWw7/view?usp=sharingVideo mode
Write 82,2 Read 105,5 mb\shttps://drive.google.com/file/d/1kDcZVdm-Y5UW2qtTqRVdBiQmMnTUpYmg/view?usp=sharingAt the same time, I can record raw videos and files open normally.
Record indicator
https://drive.google.com/file/d/13vY8fDGzSZOxx5Z2Mm9c_xiSdnl1ivyI/view?usp=sharingRaw video settings
https://drive.google.com/file/d/18t2nmtp4DPVM8c0COOiHOCXnaf0StwMt/view?usp=sharingMLV lite screenshot
https://drive.google.com/file/d/1cl0Ti0vUkjsC9-yoP4f0unDKOdh0gpMs/view?usp=sharingPrior to this, 240 mhz speeds were in play mode W 95, R 105.5 mb\s and in video mode W 76 R ~ 85 mb\s.
With kingston sda3 64GB, this preset does not work, because in the current version of the module, where you can change settings, there is no blocking of values.
And as I found out earlier, for this sd card, blocking values is necessary (see the previous post).
Please check this preset on other cameras and sd cards where the 240 mfz preset works normally. You may see improved write and read speeds. If so, share the results on which camera and with which sd card it turned out.@theBilalFakhouri, can you say when you set the value of the register to 0x0, does it really correspond to this value, or does the register simply remain unchanged and the patch does not apply to it? This is important for understanding what is really happening.
In the process of selecting register values for the preset, I noticed a number of laws that I will try to describe further. These patterns are only assumptions, but you can confirm or refute them, as well as share your experience in selecting values for presets.
The register 0xC0400600 can take values from 0 (?) to F, among which 3 groups are allocated (from faster write speed to lower):
- 0x8, 9, a, b, c, d, e, f
- 0x3
- 0x1, 2, 4, 5, 6, 7
Within each group, if you change the register, the write rate remains the same.
The register 0xC0400604 can take values from 0 (?) to F, among which 4 groups are allocated (from faster write speed to lower):
- 0x3, 7, b, f
- 0x2, 6, a, e
- 0x1, 5, 9, d
- 0x0, 4, 8, c
Within each group, if you change the register, the write rate remains the same.
The 0xC0400610 register can take values from 0 (?) to F, with the following distribution according to the recording speeds in video mode (values for sandisk extreme pro 256gb):
0x1 - 20.7mb\s is a possibly incorrect value that returns the write rate to "48mhz."
0x2 - 82 mb\s
0x3 - 77,1 mb\s
0x4 - 67 mb\s
0x5 - 57,8 mb\s
0x6 - 51,3 mb\s
... - recording speed drops as value increases
0xf - 26,2 mb\s
The 0xC0400614 register can take a lot of values, but the very speed of writing and reading is not directly affected. It affects in general whether the preset will work correctly, or the read/write speed will drop by 20.7-21 mb\s aka "48 mhz mode."
The value of this register may be associated with the value of the 0xC0400610 register.
I will explain by example:
At value of register 0xC0400610 equal 0x2, any value of register 0xC0400614 excellent from 0x1d000201 does prest not working (speed falls up to 20.7 mb\s).
A similar picture in the case of a register value 0xC0400610 0x1 - for it you need 0x1d000001 in the register 0xC0400614.
At the same time, if the register value 0xC0400610 equal to 0x3, 4, etc., the values of the register 0xC0400614, at which the preset will work (the speed does not fall to 20.7 mb\s), there can be a set (without any pattern of distribution).
The register 0xC0400614 can take values from 0 (?) to F. In this case, if the value of the register 0xC0400614 does not match the value of the register 0xC0400610 (with the exception of 0x0), then the write\read speed drops to 20.7 mb\s, making the preset inoperative.
Register 0xC0400618 (I tried all values from 0 to F in different combinations with other registers), registers 0xC0400624, 0xC0400628, 0xC040061C probably have no effect on the write speed\read and the operation of the preset.
For example, I made the following settings (for registers 0xC0400618, 0xC0400624, 0xC0400628, 0xC040061C) and got the same recording speed in video mode 82 mb\s, as if I left the default values.
https://drive.google.com/file/d/1HjVij4y-vICXrqGdpfRnANIQP7qLdEnp/view?usp=sharingI ask you to check whether these patterns are observed on other cameras and sd cards and publish the results here.
