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drm/radeon: add a i2c bus mutex

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The i2c and aux buses use the same pads so add
a mutex to protect access to the pads.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Alex Deucher
2014-05-08 10:58:04 -04:00
committed by Alex Deucher
parent 182407a6ed
commit 831719d62f
4 changed files with 37 additions and 8 deletions
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drivers/gpu/drm/radeon/radeon_mode.h
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@@ -191,6 +191,7 @@ struct radeon_i2c_chan {
struct radeon_i2c_bus_rec rec;
struct drm_dp_aux aux;
bool has_aux;
struct mutex mutex;
};
/* mostly for macs, but really any system without connector tables */