[3.5.y.z extended stable] Patch "drm/radeon/atom: workaround vbios bug in transmitter table on rs780" has been added to staging queue

Luis Henriques luis.henriques at canonical.com
Wed Nov 6 10:40:17 UTC 2013

This is a note to let you know that I have just added a patch titled

    drm/radeon/atom: workaround vbios bug in transmitter table on rs780

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:


If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see



>From f20e2e1909d73801b36eb2d452ab00d5c6285a70 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher at amd.com>
Date: Thu, 10 Oct 2013 16:45:27 -0400
Subject: drm/radeon/atom: workaround vbios bug in transmitter table on rs780

commit c23632d4e57c0dd20bf50eca08fa0eb8ad3ff680 upstream.

Some rs780 asics seem to be affected as well.



Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Luis Henriques <luis.henriques at canonical.com>
 drivers/gpu/drm/radeon/atombios_encoders.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/atombios_encoders.c b/drivers/gpu/drm/radeon/atombios_encoders.c
index 64bc2bd..3c4138f 100644
--- a/drivers/gpu/drm/radeon/atombios_encoders.c
+++ b/drivers/gpu/drm/radeon/atombios_encoders.c
@@ -1430,7 +1430,7 @@ radeon_atom_encoder_dpms_dig(struct drm_encoder *encoder, int mode)
 			 * does the same thing and more.
 			if ((rdev->family != CHIP_RV710) && (rdev->family != CHIP_RV730) &&
-			    (rdev->family != CHIP_RS880))
+			    (rdev->family != CHIP_RS780) && (rdev->family != CHIP_RS880))
 				atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE_OUTPUT, 0, 0);
 		if (ENCODER_MODE_IS_DP(atombios_get_encoder_mode(encoder)) && connector) {

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