diff options
Diffstat (limited to 'meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3574-drm-amd-display-Add-logging-for-aux-DPCD-access.patch')
| -rw-r--r-- | meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3574-drm-amd-display-Add-logging-for-aux-DPCD-access.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3574-drm-amd-display-Add-logging-for-aux-DPCD-access.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3574-drm-amd-display-Add-logging-for-aux-DPCD-access.patch new file mode 100644 index 00000000..a5aff09a --- /dev/null +++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/3574-drm-amd-display-Add-logging-for-aux-DPCD-access.patch @@ -0,0 +1,59 @@ +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 + |