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authorDave Airlie <airlied@gmail.com>2014-04-19 11:16:02 +1000
committerDave Airlie <airlied@gmail.com>2014-04-19 11:16:02 +1000
commita42892ed10585c5511e8a3e53f0350b4e2242050 (patch)
tree75cc2ac053bd81a441e083a970a39a58691a8667 /include
parentc044330baa91b6885597cfaaa58b00b6aa690958 (diff)
parent8902e6f2b832e00e10c6f9e9532f6f63feb4972f (diff)
downloadlinux-a42892ed10585c5511e8a3e53f0350b4e2242050.tar.bz2
Merge branch 'drm-next-3.15-wip' of git://people.freedesktop.org/~deathsimple/linux into drm-next
Some i2c fixes over DisplayPort. * 'drm-next-3.15-wip' of git://people.freedesktop.org/~deathsimple/linux: drm/radeon: Improve vramlimit module param documentation drm/radeon: fix audio pin counts for DCE6+ (v2) drm/radeon/dp: switch to the common i2c over aux code drm/dp/i2c: Update comments about common i2c over dp assumptions (v3) drm/dp/i2c: send bare addresses to properly reset i2c connections (v4) drm/radeon/dp: handle zero sized i2c over aux transactions (v2) drm/i915: support address only i2c-over-aux transactions drm/tegra: dp: Support address-only I2C-over-AUX transactions
Diffstat (limited to 'include')
-rw-r--r--include/drm/drm_dp_helper.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index b4f58914bf7d..cfcacec5b89d 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -456,6 +456,10 @@ struct drm_dp_aux_msg {
* transactions. The drm_dp_aux_register_i2c_bus() function registers an
* I2C adapter that can be passed to drm_probe_ddc(). Upon removal, drivers
* should call drm_dp_aux_unregister_i2c_bus() to remove the I2C adapter.
+ *
+ * Note that the aux helper code assumes that the .transfer() function
+ * only modifies the reply field of the drm_dp_aux_msg structure. The
+ * retry logic and i2c helpers assume this is the case.
*/
struct drm_dp_aux {
const char *name;