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From 44f558d7f1721abe4ddd122c49935cd6b7e2d3bf Mon Sep 17 00:00:00 2001
From: Eric Yang <Eric.Yang2@amd.com>
Date: Tue, 6 Feb 2018 17:28:46 -0500
Subject: [PATCH 3574/4131] 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 <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>
---
drivers/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 fc7a7d4..0b1db48f 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;
}
--
2.7.4
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