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Revert "drm/radeon: fix DP link training issue with second 4K monitor"

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commit 9dc79965b2 upstream.

This reverts commit 1a738347df.

It caused at least some Kaveri laptops to incorrectly report DisplayPort
connectors as connected.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97857
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michel Dänzer 2016-10-24 16:52:20 +09:00 committed by Greg Kroah-Hartman
parent a1ffa7c37a
commit 4b32256b27
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/radeon/radeon_dp_auxch.c
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@ -105,7 +105,7 @@ radeon_dp_aux_transfer_native(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg
tmp &= AUX_HPD_SEL(0x7);
tmp |= AUX_HPD_SEL(chan->rec.hpd);
tmp |= AUX_EN | AUX_LS_READ_EN | AUX_HPD_DISCON(0x1);
tmp |= AUX_EN | AUX_LS_READ_EN;
WREG32(AUX_CONTROL + aux_offset[instance], tmp);