diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2014-12-10 09:42:10 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-27 07:52:31 -0800 |
| commit | 4d7af8bb7c6530349581c5fb0884ea6145de43fe (patch) | |
| tree | 3edfbf0ed8a093280d20abb4262a43dbded7f46e | |
| parent | 13742208aade52e160dae03c51008cfb3432c45c (diff) | |
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>
| -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 4c05f2b015cf..d4a5118911fd 100644 --- a/drivers/gpu/drm/radeon/atombios_dp.c +++ b/drivers/gpu/drm/radeon/atombios_dp.c @@ -574,6 +574,10 @@ 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; |