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

Message ID 1416849387-20984-4-git-send-email-eich@suse.de (mailing list archive)
State New, archived
Headers show

Commit Message

Egbert Eich Nov. 24, 2014, 5:16 p.m. UTC 
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(-)
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Patch

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 */