Messages in this thread Patch in this message | | | From | Ben Hutchings <> | Date | Tue, 05 May 2015 02:16:39 +0100 | Subject | [PATCH 3.2 041/221] drm/radeon/dp: Set EDP_CONFIGURATION_SET for bridge chips if necessary |
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3.2.69-rc1 review patch. If anyone has any objections, please let me know.
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From: Alex Deucher <alexander.deucher@amd.com>
commit 66c2b84ba6256bc5399eed45582af9ebb3ba2c15 upstream.
Don't restrict it to just eDP panels. Some LVDS bridge chips require this. Fixes blank panels on resume on certain laptops. Noticed by mrnuke on IRC.
bug: https://bugs.freedesktop.org/show_bug.cgi?id=42960
Signed-off-by: Alex Deucher <alexander.deucher@amd.com> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk> --- drivers/gpu/drm/radeon/atombios_dp.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -739,10 +739,8 @@ static int radeon_dp_link_train_init(str radeon_write_dpcd_reg(dp_info->radeon_connector, DP_DOWNSPREAD_CTRL, 0); - if ((dp_info->connector->connector_type == DRM_MODE_CONNECTOR_eDP) && - (dig->panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)) { + if (dig->panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE) radeon_write_dpcd_reg(dp_info->radeon_connector, DP_EDP_CONFIGURATION_SET, 1); - } /* set the lane count on the sink */ tmp = dp_info->dp_lane_count;
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