[PATCH 1/4] drm/dp: add flags field to drm_dp_aux_msg struct

[Alex Deucher]

This adds a flags field and a new flag, BARE_ADDRESS,
which drivers can use for special handling when they
want to set just the aux address.  This is needed
to properly reset the connection between i2c transactions.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 include/drm/drm_dp_helper.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index b7488c9..a006e96 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -403,6 +403,8 @@ drm_dp_enhanced_frame_cap(const u8 dpcd[DP_RECEIVER_CAP_SIZE])
  * DisplayPort AUX channel
  */
 
+#define DRM_DP_AUX_MSG_FLAGS_BARE_ADDRESS (1 << 0)
+
 /**
  * struct drm_dp_aux_msg - DisplayPort AUX channel transaction
  * @address: address of the (first) register to access
@@ -417,6 +419,7 @@ struct drm_dp_aux_msg {
 	u8 reply;
 	void *buffer;
 	size_t size;
+	u32 flags;
 };
 
 /**
-- 
1.8.3.1