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drm/amd/display: Serialize is_dp_sink_present

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Access to GPIO needs to be serialized. Aux transactions are already
serialized in DRM but we also need to serialize access to the GPIO pin
for purposes of DP dongle detection.

Call is_dp_sink_present through DM so we can lock correctly. This
follows the same pattern used for DPCD transactions.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland
2018-05-29 13:11:55 -04:00
committed by Alex Deucher
parent 1bd493e378
commit aac5db824d
4 changed files with 23 additions and 2 deletions
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3
drivers/gpu/drm/amd/display/dc/dm_helpers.h
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@@ -103,6 +103,9 @@ bool dm_helpers_submit_i2c(
const struct dc_link *link,
struct i2c_command *cmd);
bool dm_helpers_is_dp_sink_present(
struct dc_link *link);
enum dc_edid_status dm_helpers_read_local_edid(
struct dc_context *ctx,
struct dc_link *link,