Samson Tam 4fc1609bcd drm/amd/display: skip retrain in dc_link_set_preferred_link_settings() if using passive dongle ... [Why] Fixes issue when we have a display connected using a passive dongle and then emulate over it using a DP connection at 1 x 1.62 Ghz. System hangs because register bus returns back 0xFFFFFFFF for all register reads after setting register DIG_BE_CNTL in dcn10_link_encoder_connect_dig_be_to_fe(). Hang occurs later when trying to do a register read. [How] At the start of the emulation, dc_link_set_preferred_link_settings() and dp_retrain_link_dp_test() is called, even though it is connected using a passive dongle. Add an extra condition in dp_retrain_link_dp_test() to check for link->dongle_max_pix_clk > 0. This is the only way we know if the connection is using passive dongle so we don't retrain DP. Signed-off-by: Samson Tam <Samson.Tam@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Leo Li <sunpeng.li@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>		2019-07-18 14:17:19 -05:00
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amdgpu_dm	drm/amd/display: Force uclk to max for every state	2019-07-18 14:11:47 -05:00
dc	drm/amd/display: skip retrain in dc_link_set_preferred_link_settings() if using passive dongle	2019-07-18 14:17:19 -05:00
include	drm/amd/display: update DSC MST DP virtual DPCD peer device enumeration policy	2019-06-22 09:34:13 -05:00
modules	Merge branch 'drm-next' into drm-next-5.3	2019-06-25 08:42:25 -05:00
Kconfig	drm/amd/display: Add drm_audio_component support to amdgpu_dm	2019-07-11 14:37:24 -05:00
Makefile	drm/amd/display: move clk_mgr files to right place	2019-05-31 10:39:31 -05:00
TODO	drm/amd/display: Convert remaining loggers off dc_logger	2018-07-13 14:48:42 -05:00