Adding TVP5147 (Texas Instrument TV Decoder) Support to SBC-i.MX51

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Adding TVP5147 (Texas Instrument TV Decoder) Support to SBC-i.MX51

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LautaroCarmona1
Contributor II

In order to add TVP5147 TV input support, we have made our own tvp5147 mxc v4l2 driver available to anyone at this site: http://code.google.com/p/tvp5147-mxc-v4l2/

We also added the following instructions on how we managed to make it work with SBC-i.MX51.

Hope you found this useful.

Here are the instructions:

 

In order to include TVP5147 support to our board we needed to:

  • Create the driver: "drivers/media/video/mxc/capture/tvp5147.c"
  • Include the driver's registers header file: "drivers/media/video/mxc/capture/tvp514x_regs.h"
  • Modify the following files:
    • "arch/arm/mach-mx5/mx51_3stack.c"
    • "drivers/media/video/mxc/capture/Makefile"
    • "drivers/media/video/mxc/capture/KConfig"


All this files are uploaded in the SVN trunk of this project: http://code.google.com/p/tvp5147-mxc-v4l2/


About the changes in "arch/arm/mach-mx5/mx51_3stack.c":

The modified version of "mx51_3stack.c" is also uploaded in the SVN trunk.
You should check the differences with your own version of "mx51_3stack.c" and then replace it with our version or manually add our changes.
Basically, we:

  • added our device to the "i2c_board_info" struct (with i2c address 0x5c), 
  • defined the powerup, powerdown, reset functions to dinamically control the device power when the driver module is loaded/unloaded, and
  • set the CSI master clock frequency (although we are not currently using it, as we use our own 14.31 MHz clock on board).


About the changes in "drivers/media/video/mxc/capture/Makefile":

To compile our driver and add it to the kernel we added this lines to the file: "drivers/media/video/mxc/capture/Makefile"

#Added to include TVP5147 support:
tvp5147_tvin-objs := tvp5147.o
obj-$(CONFIG_MXC_TVIN_TVP5147) += tvp5147_tvin.o


About the changes in "drivers/media/video/mxc/capture/KConfig":

To make it available at the kernel menuconfig we added this lines to the file: "drivers/media/video/mxc/capture/KConfig"

config MXC_TVIN_TVP5147
tristate "Texas Instrument tvp5147 TV Decoder Input support"
depends on (MACH_MX35_3DS || MACH_MX51_3DS)
---help---
If you plan to use the tvp5147 video decoder with your MXC system, say Y here.

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