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path: root/drivers/gpu/drm/amd/display/dc/inc/dc_link_dpia.h (follow)
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2022-05-26drm/amd/display: Query DPIA HPD status.Jimmy Kizito1-0/+5
[Why] Driver needs up to date DPIA HPD status. [How] Use HPD query command to get DPIA HPD status. Reviewed-by: Meenakshikumar Somasundaram <Meenakshikumar.Somasundaram@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com> Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com> Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-12-30drm/amd/display: define link res and make it accessible to all link interfacesWenjing Liu1-2/+3
[why] There will be a series of re-arch changes in Link Resource Management. They are more and more muxable link resource objects and the resource is insufficient for a one to one allocation to all links created. Therefore a link resource sharing logic is required to determine which link should use certain link resource. This commit is the first one in this series that starts by defining a link resource struct, this struct will be available to all interfaces that need to perform link programming sequence. In later commits, we will granduately decouple link resource objects out of dc link. So instead of access a link resource from dc link. Current link's resource can be accessible through pipe_ctx->link_res during commit, or by calling dc_link_get_cur_link_res function with current link passed in after commit. Tested-by: Daniel Wheeler <daniel.wheeler@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com> Signed-off-by: Wenjing Liu <wenjing.liu@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-10-06drm/amd/display: Add debug flags for USB4 DP link training.Jimmy Kizito1-0/+3
[Why & How] Additional debug flags that can be useful for testing USB4 DP link training. Add flags: - 0x2 : Forces USB4 DP link to non-LTTPR mode - 0x4 : Extends status read intervals to about 60s. Reviewed-by: Meenakshikumar Somasundaram <meenakshikumar.somasundaram@amd.com> Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Wayne Lin <Wayne.Lin@amd.com> Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-10-06drm/amd/display: Read USB4 DP tunneling data from DPCD.Jimmy Kizito1-0/+7
[Why] We requires information from DPCD in order to identify USB4 DP tunneling targets. [How] Add USB4 DP tunneling fields to DPCD struct and populate these fields during sink detection. Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Wayne Lin <Wayne.Lin@amd.com> Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-10-06drm/amd/display: Implement DPIA clock recovery phaseJimmy Kizito1-0/+40
[Why] Clock recovery is the mandatory first phase of DP link training. [How] - Implement clock recovery phase in DPIA training module. - Add helper functions for building SET_CONFIG messages. Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Wayne Lin <Wayne.Lin@amd.com> Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-10-06drm/amd/display: Implement DPIA training loopJimmy Kizito1-0/+10
[Why] Training of DPIA link differs enough from that of conventional DP link to warrant a separate implementation. [How] - Implement top-level of DPIA training loop. - Make functions shared between DP and DPIA link training "public". Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Wayne Lin <Wayne.Lin@amd.com> Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2021-10-06drm/amd/display: Add stub to get DPIA tunneling device dataJimmy Kizito1-0/+39
[why & how] 1. Add stub for getting tunneling device data 2. Add check for phy_repeater_cnt < 0xff to LTTPR check 3. Add two more bits of information to DPIA links Reviewed-by: Jun Lei <Jun.Lei@amd.com> Acked-by: Wayne Lin <Wayne.Lin@amd.com> Acked-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com> Acked-by: Harry Wentland <harry.wentland@amd.com> Signed-off-by: Jimmy Kizito <Jimmy.Kizito@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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