This is a note to let you know that I've just added the patch titled drm/radeon/kms/atom: fix duallink on some early DCE3.2 cards
to the 2.6.39-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: drm-radeon-kms-atom-fix-duallink-on-some-early-dce3.2-cards.patch and it can be found in the queue-2.6.39 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <sta...@kernel.org> know about it. >From 8323fa6ba313ae2664420ec34d56a7fb0bbbe525 Mon Sep 17 00:00:00 2001 From: Alex Deucher <alexdeuc...@gmail.com> Date: Fri, 17 Jun 2011 13:13:52 -0400 Subject: drm/radeon/kms/atom: fix duallink on some early DCE3.2 cards From: Alex Deucher <alexdeuc...@gmail.com> commit 8323fa6ba313ae2664420ec34d56a7fb0bbbe525 upstream. Certain revisions of the vbios on DCE3.2 cards have a bug in the transmitter control table which prevents duallink from being enabled properly on some cards. The action switch statement jumps to the wrong offset for the OUTPUT_ENABLE action. The fix is to use the ENABLE action rather than the OUTPUT_ENABLE action on the affected cards. In fixed version of the vbios, both actions jump to the same offset, so the change should be safe. Reported-and-tested-by: Dave Airlie <airl...@redhat.com> Signed-off-by: Alex Deucher <alexdeuc...@gmail.com> Signed-off-by: Dave Airlie <airl...@redhat.com> Signed-off-by: Greg Kroah-Hartman <gre...@suse.de> --- drivers/gpu/drm/radeon/radeon_encoders.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/radeon/radeon_encoders.c +++ b/drivers/gpu/drm/radeon/radeon_encoders.c @@ -1294,7 +1294,11 @@ radeon_atom_encoder_dpms(struct drm_enco if (is_dig) { switch (mode) { case DRM_MODE_DPMS_ON: - atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE_OUTPUT, 0, 0); + /* some early dce3.2 boards have a bug in their transmitter control table */ + if ((rdev->family == CHIP_RV710) || (rdev->family == CHIP_RV730)) + atombios_dig_transmitter_setup(encoder, ATOM_TRANSMITTER_ACTION_ENABLE, 0, 0); + else + 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); Patches currently in stable-queue which might be from alexdeuc...@gmail.com are queue-2.6.39/drm-radeon-kms-fix-chremap-setup-on-rv770-ce.patch queue-2.6.39/drm-radeon-kms-atom-fix-duallink-on-some-early-dce3.2-cards.patch _______________________________________________ stable mailing list stable@linux.kernel.org http://linux.kernel.org/mailman/listinfo/stable