From fdf0c1c2f75ea3380e13a5f26a0155775d5162f0 Mon Sep 17 00:00:00 2001 From: Eric Yang Date: Tue, 6 Feb 2018 17:28:46 -0500 Subject: [PATCH] drm/amd/display: Add logging for aux DPCD access 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 Reviewed-by: Tony Cheng Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- .../gpu/drm/amd/display/dc/i2caux/aux_engine.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/gpu/drm/amd/display/dc/i2caux/aux_engine.c b/drivers/gpu/drm/amd/display/dc/i2caux/aux_engine.c index fc7a7d4ebca5..0b1db48fef36 100644 --- a/drivers/gpu/drm/amd/display/dc/i2caux/aux_engine.c +++ b/drivers/gpu/drm/amd/display/dc/i2caux/aux_engine.c @@ -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; } -- 2.30.2