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From: Alex Deucher <alexander.deucher@amd.com>
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Date: Wed, 11 Feb 2015 18:34:36 -0500
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Subject: [PATCH] drm/radeon/dp: Set EDP_CONFIGURATION_SET for bridge chips if
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necessary
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Don't restrict it to just eDP panels. Some LVDS bridge chips require
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this. Fixes blank panels on resume on certain laptops. Noticed
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by mrnuke on IRC.
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bug:
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https://bugs.freedesktop.org/show_bug.cgi?id=42960
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Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Cc: stable@vger.kernel.org
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---
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drivers/gpu/drm/radeon/atombios_dp.c | 4 +---
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1 file changed, 1 insertion(+), 3 deletions(-)
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diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c
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index db42a670f995..5bf825dfaa09 100644
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--- a/drivers/gpu/drm/radeon/atombios_dp.c
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+++ b/drivers/gpu/drm/radeon/atombios_dp.c
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@@ -623,10 +623,8 @@ static int radeon_dp_link_train_init(struct radeon_dp_link_train_info *dp_info)
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drm_dp_dpcd_writeb(dp_info->aux,
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DP_DOWNSPREAD_CTRL, 0);
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- if ((dp_info->connector->connector_type == DRM_MODE_CONNECTOR_eDP) &&
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- (dig->panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)) {
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+ if (dig->panel_mode == DP_PANEL_MODE_INTERNAL_DP2_MODE)
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drm_dp_dpcd_writeb(dp_info->aux, DP_EDP_CONFIGURATION_SET, 1);
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- }
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/* set the lane count on the sink */
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tmp = dp_info->dp_lane_count;
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--
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2.1.0
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