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| author | Alex Deucher <alexander.deucher@amd.com> | 2014-12-10 09:42:10 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2015-01-05 12:08:57 -0500 |
| commit | 410cce2a6b82299b46ff316c6384e789ce275ecb (patch) | |
| tree | d290d03a5a34b77d477ac98e7edfaca828c7ffd0 /drivers/gpu | |
| parent | 5665c3ebe5ee8a2c516925461f7214ba59c2e6d7 (diff) | |
| download | linux-410cce2a6b82299b46ff316c6384e789ce275ecb.tar.bz2 | |
drm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw
The check was already in place in the dp mode_valid check, but
radeon_dp_get_dp_link_clock() never returned the high clock
mode_valid was checking for because that function clipped the
clock based on the hw capabilities. Add an explicit check
in the mode_valid function.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=87172
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc:stable@vge.kernel.org
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/radeon/atombios_dp.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 11ba9d21b89b..db42a670f995 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -492,6 +492,10 @@ int radeon_dp_mode_valid_helper(struct drm_connector *connector, struct radeon_connector_atom_dig *dig_connector; int dp_clock; + if ((mode->clock > 340000) && + (!radeon_connector_is_dp12_capable(connector))) + return MODE_CLOCK_HIGH; + if (!radeon_connector->con_priv) return MODE_CLOCK_HIGH; dig_connector = radeon_connector->con_priv; |