Messages in this thread Patch in this message | | | From | Kamal Mostafa <> | Subject | [PATCH 3.13.y-ckt 026/103] drm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw | Date | Wed, 18 Feb 2015 16:31:53 -0800 |
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3.13.11-ckt16 -stable review patch. If anyone has any objections, please let me know.
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From: Alex Deucher <alexander.deucher@amd.com>
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: Kamal Mostafa <kamal@canonical.com> --- drivers/gpu/drm/radeon/atombios_dp.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/radeon/atombios_dp.c b/drivers/gpu/drm/radeon/atombios_dp.c index 514a623..719c7a1 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; -- 1.9.1
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