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authorVille Syrjälä <ville.syrjala@linux.intel.com>2015-08-27 17:23:28 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2015-09-08 20:12:53 +0200
commit1f75b29d3fc9abb06b095860f9312f8190e6015b (patch)
treedaa75b633926b8a1002f7e5f879f4bbec99b68d8
parentc1e74122fb029d30b66d9364122aef50265354aa (diff)
drm/radeon: Handle DP_AUX_I2C_WRITE_STATUS_UPDATE
When we get an i2c defer or short ack for i2c-over-aux write we need to switch to WRITE_STATUS_UPDATE to poll for the completion of the original request. Looks like radeon doesn't do anything special with the request type, so hopefully just treating it the same as a i2c write is enough. Cc: Alex Deucher <alexander.deucher@amd.com> Cc: "Christian König" <christian.koenig@amd.com> Acked-by: Alex Deucher <alexander.deucher@amd.com> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
-rw-r--r--drivers/gpu/drm/radeon/atombios_dp.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index 9cd49c584263..bd73b4069069 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -179,6 +179,7 @@ radeon_dp_aux_transfer_atom(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
switch (msg->request & ~DP_AUX_I2C_MOT) {
case DP_AUX_NATIVE_WRITE:
case DP_AUX_I2C_WRITE:
+ case DP_AUX_I2C_WRITE_STATUS_UPDATE:
/* The atom implementation only supports writes with a max payload of
* 12 bytes since it uses 4 bits for the total count (header + payload)
* in the parameter space. The atom interface supports 16 byte

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