From: Wenjing Liu <wenjing....@amd.com>
[ 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....@amd.com>
Reviewed-by: Aric Cyr <aric....@amd.com>
Reviewed-by: Jun Lei <jun....@amd.com>
Acked-by: Abdoulaye Berthe <abdoulaye.ber...@amd.com>
Acked-by: Leo Li <sunpeng...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@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
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