Commit d30df55b authored by Alex Deucher's avatar Alex Deucher

drm/radeon/dp: sleep after powering up the display

According to the DP 1.1 spec, the sink must power
up within 1ms.  Noticed while reviewing Thierry's
drm/dp patches.
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent ab9f51c0
......@@ -673,9 +673,11 @@ static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info)
u8 tmp;
/* power up the sink */
if (dp_info->dpcd[0] >= 0x11)
if (dp_info->dpcd[0] >= 0x11) {
radeon_write_dpcd_reg(dp_info->radeon_connector,
DP_SET_POWER, DP_SET_POWER_D0);
usleep_range(1000, 2000);
}
/* possibly enable downspread on the sink */
if (dp_info->dpcd[3] & 0x1)
......
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