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drm/amd/display: Add logging for aux DPCD access

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Add basic logging for DPCD access. Does not print
by default.

Currently only prints first byte of the data accessed.

Technical debt: Need to make it so that the entire
data block accessed is printed. Also need to log
address space that's not DPCD.

Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Eric Yang
2018-02-06 17:28:46 -05:00
committed by Alex Deucher
parent 3b94a4007d
commit fdf0c1c2f7
1 changed files with 16 additions and 0 deletions
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16
drivers/gpu/drm/amd/display/dc/i2caux/aux_engine.c
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@@ -284,6 +284,14 @@ static bool read_command(
msleep(engine->delay);
} while (ctx.operation_succeeded && !ctx.transaction_complete);
if (request->payload.address_space ==
I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
dm_logger_write(engine->base.ctx->logger, LOG_I2C_AUX, "READ: addr:0x%x value:0x%x Result:%d",
request->payload.address,
request->payload.data[0],
ctx.operation_succeeded);
}
return ctx.operation_succeeded;
}
@@ -484,6 +492,14 @@ static bool write_command(
msleep(engine->delay);
} while (ctx.operation_succeeded && !ctx.transaction_complete);
if (request->payload.address_space ==
I2CAUX_TRANSACTION_ADDRESS_SPACE_DPCD) {
dm_logger_write(engine->base.ctx->logger, LOG_I2C_AUX, "WRITE: addr:0x%x value:0x%x Result:%d",
request->payload.address,
request->payload.data[0],
ctx.operation_succeeded);
}
return ctx.operation_succeeded;
}