linux-kernel - [062/205] drm/radeon/kms: fix DP after DPMS cycle

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Message-Id: <20100730175139.219519573@clark.site>
Date:	Fri, 30 Jul 2010 10:51:19 -0700
From:	Greg KH <gregkh@...e.de>
To:	linux-kernel@...r.kernel.org, stable@...nel.org
Cc:	stable-review@...nel.org, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
	Alex Deucher <alexdeucher@...il.com>,
	Dave Airlie <airlied@...hat.com>
Subject: [062/205] drm/radeon/kms: fix DP after DPMS cycle

2.6.34-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Alex Deucher <alexdeucher@...il.com>

commit a5f798ce2b9de4b14c46cb68d58c488dc1b8e215 upstream.

The transmitter needs to be enabled before the link is trained.

Reported-By: Lars Doelle <lars.doelle@...line.de>
Signed-off-by: Alex Deucher <alexdeucher@...il.com>
Signed-off-by: Dave Airlie <airlied@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>

---
 drivers/gpu/drm/radeon/radeon_encoders.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -1075,6 +1075,8 @@ radeon_atom_encoder_dpms(struct drm_enco
 	if (is_dig) {
 		switch (mode) {
 		case DRM_MODE_DPMS_ON:
+			if (!ASIC_IS_DCE4(rdev))
+				atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE_OUTPUT, 0, 0);
 			if (atombios_get_encoder_mode(encoder) == ATOM_ENCODER_MODE_DP) {
 				struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);
 
@@ -1082,8 +1084,6 @@ radeon_atom_encoder_dpms(struct drm_enco
 				if (ASIC_IS_DCE4(rdev))
 					atombios_dig_encoder_setup(encoder, ATOM_ENCODER_CMD_DP_VIDEO_ON);
 			}
-			if (!ASIC_IS_DCE4(rdev))
-				atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE_OUTPUT, 0, 0);
 			break;
 		case DRM_MODE_DPMS_STANDBY:
 		case DRM_MODE_DPMS_SUSPEND:


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