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drm/radeon/kms: fix DVO setup on some r4xx chips 

Some r4xx chips have the wrong frev in the
DVOEncoderControl table.  It should always be 1
on r4xx.  Fixes modesetting on DVO on r4xx chips
with the bad frev.

Reported by twied on #radeon.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2012-04-03 17:05:41 -04:00 committed by Dave Airlie
parent 6587eb8261
commit afceb9319f
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/radeon/atombios_encoders.c
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@ -230,6 +230,10 @@ atombios_dvo_setup(struct drm_encoder *encoder, int action)
if (!atom_parse_cmd_header(rdev->mode_info.atom_context, index, &frev, &crev))
return;
/* some R4xx chips have the wrong frev */
if (rdev->family <= CHIP_RV410)
frev = 1;
switch (frev) {
case 1:
switch (crev) {