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| author | Alex Deucher <alexander.deucher@amd.com> | 2014-12-10 09:42:10 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-27 08:18:54 -0800 |
| commit | bec547b5af2fd43e9a77dbf42984d72a329f1440 (patch) | |
| tree | d0489594376940280326f726f7fb374eb8cd174a /drivers/gpu/drm/radeon | |
| parent | 39a9d48d8a0fe4554926bbfce07508c30088297a (diff) | |
| download | lwn-bec547b5af2fd43e9a77dbf42984d72a329f1440.tar.gz lwn-bec547b5af2fd43e9a77dbf42984d72a329f1440.zip | |
drm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw
commit 410cce2a6b82299b46ff316c6384e789ce275ecb upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/radeon')
| -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 5727dbdeda7f..b4dbaded2caf 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -576,6 +576,10 @@ 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; |