From: Dave Airlie Date: Sun, 18 Mar 2012 10:10:50 +0000 (+0000) Subject: drm/radeon: dp only enable enhanced framing if sink supports. X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=abc8113fe56948858ff44f4b1795875be0cb5e99;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git drm/radeon: dp only enable enhanced framing if sink supports. DisplayPort spec v1.1a, Table 2-52. Same commit to Intel by ajax in 9962c9252e46eda7058067cbe73bdf1ed74b0d37 Reviewed-by: Alex Deucher Signed-off-by: Dave Airlie --- diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 552b436451fd..191218ad92e7 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -746,7 +746,8 @@ static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info) /* set the lane count on the sink */ tmp = dp_info->dp_lane_count; - if (dp_info->dpcd[0] >= 0x11) + if (dp_info->dpcd[DP_DPCD_REV] >= 0x11 && + dp_info->dpcd[DP_MAX_LANE_COUNT] & DP_ENHANCED_FRAME_CAP) tmp |= DP_LANE_COUNT_ENHANCED_FRAME_EN; radeon_write_dpcd_reg(dp_info->radeon_connector, DP_LANE_COUNT_SET, tmp);