drm/radeon/dp: bump i2c-over-aux retries to 7

As per the DP1.2 spec.  Noticed while reviewing
Thierry's drm/dp patches. Also bump native aux
retries to 7 for consistency.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
index 37289f6..149e09a 100644 (file)
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -161,7 +161,7 @@ static int radeon_dp_aux_native_write(struct radeon_connector *radeon_connector,
        msg[3] = (msg_bytes << 4) | (send_bytes - 1);
        memcpy(&msg[4], send, send_bytes);
 
-       for (retry = 0; retry < 4; retry++) {
+       for (retry = 0; retry < 7; retry++) {
                ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus,
                                            msg, msg_bytes, NULL, 0, delay, &ack);
                if (ret == -EBUSY)
@@ -195,7 +195,7 @@ static int radeon_dp_aux_native_read(struct radeon_connector *radeon_connector,
        msg[2] = DP_AUX_NATIVE_READ << 4;
        msg[3] = (msg_bytes << 4) | (recv_bytes - 1);
 
-       for (retry = 0; retry < 4; retry++) {
+       for (retry = 0; retry < 7; retry++) {
                ret = radeon_process_aux_ch(dig_connector->dp_i2c_bus,
                                            msg, msg_bytes, recv, recv_bytes, delay, &ack);
                if (ret == -EBUSY)
@@ -274,7 +274,7 @@ int radeon_dp_i2c_aux_ch(struct i2c_adapter *adapter, int mode,
                break;
        }
 
-       for (retry = 0; retry < 4; retry++) {
+       for (retry = 0; retry < 7; retry++) {
                ret = radeon_process_aux_ch(auxch,
                                            msg, msg_bytes, reply, reply_bytes, 0, &ack);
                if (ret == -EBUSY)