[PATCH 3/5] drm/DP: Export drm_dp_i2c_xfer() DP helper function

[Egbert Eich <eich@suse.de>]

It may be required to wrap the generic DP I2C transfer function to
perfrom certain operations before of after this function is called.
Make this function available to the driver.

Signed-off-by: Egbert Eich <eich@suse.de>
---
 drivers/gpu/drm/drm_dp_helper.c | 3 ++-
 include/drm/drm_dp_helper.h     | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index d132838..f17ac01 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -481,7 +481,7 @@ static int drm_dp_i2c_do_msg(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 	return -EREMOTEIO;
 }
 
-static int drm_dp_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
+int drm_dp_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
 			   int num)
 {
 	struct drm_dp_aux *aux = adapter->algo_data;
@@ -537,6 +537,7 @@ static int drm_dp_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
 
 	return err;
 }
+EXPORT_SYMBOL(drm_dp_i2c_xfer);
 
 static const struct i2c_algorithm drm_dp_i2c_algo = {
 	.functionality = drm_dp_i2c_functionality,
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index cd7b464..0103b7f 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -423,6 +423,8 @@ void drm_dp_link_train_channel_eq_delay(const u8 dpcd[DP_RECEIVER_CAP_SIZE]);
 
 u8 drm_dp_link_rate_to_bw_code(int link_rate);
 int drm_dp_bw_code_to_link_rate(u8 link_bw);
+int drm_dp_i2c_xfer(struct i2c_adapter *adapter, struct i2c_msg *msgs,
+		    int num);
 
 struct edp_sdp_header {
 	u8 HB0; /* Secondary Data Packet ID */
-- 
1.8.4.5

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