| From 7be3936d179eb72622c1313156a84de0421450ee Mon Sep 17 00:00:00 2001 |
| From: Wenjing Liu <Wenjing.Liu@amd.com> |
| Date: Wed, 5 Dec 2018 12:14:45 -0500 |
| Subject: drm/amd/display: validate extended dongle caps |
| |
| [ Upstream commit 99b922f9ed6a6313c0d2247cde8aa1e4a0bd67e4 ] |
| |
| [why] |
| Some dongle doesn't have a valid extended dongle caps, |
| but we still set the extended dongle caps to be valid. |
| This causes validation fails for all timing. |
| |
| [how] |
| If no dp_hdmi_max_pixel_clk is provided, |
| don't use extended dongle caps. |
| |
| Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com> |
| Reviewed-by: Aric Cyr <Aric.Cyr@amd.com> |
| Reviewed-by: Jun Lei <Jun.Lei@amd.com> |
| Acked-by: Abdoulaye Berthe <Abdoulaye.Berthe@amd.com> |
| Acked-by: Leo Li <sunpeng.li@amd.com> |
| Signed-off-by: Alex Deucher <alexander.deucher@amd.com> |
| Signed-off-by: Sasha Levin <sashal@kernel.org> |
| --- |
| drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 3 ++- |
| 1 file changed, 2 insertions(+), 1 deletion(-) |
| |
| diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c |
| index a7553b6d59c2..05840f5bddd5 100644 |
| --- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c |
| +++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c |
| @@ -2240,7 +2240,8 @@ static void get_active_converter_info( |
| translate_dpcd_max_bpc( |
| hdmi_color_caps.bits.MAX_BITS_PER_COLOR_COMPONENT); |
| |
| - link->dpcd_caps.dongle_caps.extendedCapValid = true; |
| + if (link->dpcd_caps.dongle_caps.dp_hdmi_max_pixel_clk != 0) |
| + link->dpcd_caps.dongle_caps.extendedCapValid = true; |
| } |
| |
| break; |
| -- |
| 2.19.1 |
| |
