From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
AUX addresses are 20 bits long. Send out the entire address instead of
just the low 16 bits.
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: "Christian König" <christian.koenig@xxxxxxx>
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/atombios_dp.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index 8d74de8..7a59a41 100644
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -171,8 +171,9 @@ radeon_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
return -E2BIG;
tx_buf[0] = msg->address & 0xff;
- tx_buf[1] = msg->address >> 8;
- tx_buf[2] = msg->request << 4;
+ tx_buf[1] = (msg->address >> 8) & 0xff;
+ tx_buf[2] = (msg->request << 4) |
+ ((msg->address >> 16) & 0xf);
tx_buf[3] = msg->size ? (msg->size - 1) : 0;
switch (msg->request & ~DP_AUX_I2C_MOT) {
--
2.0.5
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