problem with hdmi2.0 dp159 driver

[jtyx]

In the DP159 driver file <dp159.c>,  Two chip addresses are defined as follows:

#define I2C_DP159_ZOMBIE_ADDR 0x2C
#define I2C_DP159_ES_ADDR 0x5E

But from sn65dp159 datasheet, I can only find 8-bit wide address definition : 0xB6 0xB8 0xBA 0xBC

I think the I2C_DP159_ES_ADDR  should be corresponding to 0xBC，so why the driver difine this address as ES address? And  Where is I2C_DP159_ZOMBIE_ADDR  address coming from?

Best Regards

[auricm]

Hi @jtyx,

xilinx i2c uses 7 bit address, so address is defined as 0x5E as the 8th bit of i2c comunication is the R/W bit.

The address defined is shifted right by 1 digit, if you shift back left 1 the result is (0x5E * 2) = 0xBC that's what you're looking for.

[jtyx]

yes ,i know the difference between 7bit address and 8bit address.

My question is what does ES mean (I2C_DP159_ES_ADDR ), not engineer sample?

And what does ZOMBIE mean , where does  0x2C come from?

Thanks

[xud · Accepted solution]

@jtyx

ZOMBIE is the very old DP159, which is even before the engineering sample. At that time, TI called it ZOMBIE.

ES should refer to engineer sample.

[jtyx]

Now i konw, thanks a lot!