Baud rate change?

[elvenga]

not an issue, just a question. is it possible to increase baud rate? some tools, paid ones mostly, seem to make the flash process faster. i was reading in lglaf.py to see if i could find something but im not experienced with python.

[Lekensteyn]

Not sure. lglaf.py assumes a driver that talks USB and exposes a virtual serial interface. I don't think much savings are possible at that layer.

What could potentially be done is using different commands, or use some form of compression to maximize channel utilization. These are however not simple toggles and require someone studying the protocol over USB or the laf binary on the device.

[y0va]

I'm also wondering about this. The flash process had an IO throughput of only 250kbit/s which made the whole flashing of a LG G3 take more than 2 hours.

The usb stats are talking of a possible speed up to 5Gbit/s.

Bus 001 Device 009: ID 1004:633e LG Electronics, Inc. LM-X420xxx/G2/G3 Android Phone (MTP/download mode)
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.10
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x1004 LG Electronics, Inc.
  idProduct          0x633e LM-X420xxx/G2/G3 Android Phone (MTP/download mode)
  bcdDevice            2.32
  iManufacturer           1 LG Electronics Inc.
  iProduct                2 LGE Android Phone
  iSerial                 3 0123456789ABCDEF
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0080
    bNumInterfaces          4
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
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      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass         6 Imaging
      bInterfaceSubClass      1 Still Image Capture
      bInterfaceProtocol      1 Picture Transfer Protocol (PIMA 15470)
      iInterface              5 MTP
      Endpoint Descriptor:
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        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
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          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
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        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            2
          Transfer Type            Bulk
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      Endpoint Descriptor:
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        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            3
          Transfer Type            Interrupt
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          Usage Type               Data
        wMaxPacketSize     0x001c  1x 28 bytes
        bInterval               6
    Interface Association:
      bLength                 8
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      bFirstInterface         1
      bInterfaceCount         2
      bFunctionClass          2 Communications
      bFunctionSubClass       2 Abstract (modem)
      bFunctionProtocol       1 AT-commands (v.25ter)
      iFunction               8 CDC Serial
    Interface Descriptor:
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      CDC Header:
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      CDC Call Management:
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      CDC ACM:
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          line coding and serial state
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      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            3
          Transfer Type            Interrupt
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        wMaxPacketSize     0x0040  1x 64 bytes
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    Interface Descriptor:
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      Endpoint Descriptor:
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        bEndpointAddress     0x83  EP 3 IN
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      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
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          Usage Type               Data
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    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
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      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass    255 Vendor Specific Subclass
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      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x85  EP 5 IN
        bmAttributes            2
          Transfer Type            Bulk
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          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
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        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0200  1x 512 bytes
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Binary Object Store Descriptor:
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  bNumDeviceCaps          2
  USB 2.0 Extension Device Capability:
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      HIRD Link Power Management (LPM) Supported
  SuperSpeed USB Device Capability:
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    bDevCapabilityType      3
    bmAttributes         0x00
    wSpeedsSupported   0x000f
      Device can operate at Low Speed (1Mbps)
      Device can operate at Full Speed (12Mbps)
      Device can operate at High Speed (480Mbps)
      Device can operate at SuperSpeed (5Gbps)
    bFunctionalitySupport   1
      Lowest fully-functional device speed is Full Speed (12Mbps)
    bU1DevExitLat           1 micro seconds
    bU2DevExitLat         500 micro seconds
Device Status:     0x0000
  (Bus Powered)