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 <e...@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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