lwn.git/drivers/gpu/drm/amd/display/modules/hdcp/hdcp_log.h, branch master

drm/amd/display: add additional hdcp traces

2025-10-20T22:24:53+00:00

[why] Current hdcp trace only tracks hdcp errors. We need to expand the trace structure for more tracing information. [how] Add following traces for hdcp1: - attempt_count - downstream_device_count Add following traces for hdcp2: - attempt_count - downstream_device_count - hdcp1_device_downstream - hdcp2_legacy_device_downstream Reviewed-by: Sung Lee Signed-off-by: Wenjing Liu Signed-off-by: Aurabindo Pillai Signed-off-by: Alex Deucher

drm/amd/display: Fix hdcp_log.h codestyle

2024-01-05T21:10:44+00:00

Place HDCP_EVENT_TRACE(hdcp, event) macro content inside do while loop to avoid if-else issues in hdcp_log.h file v2: fix up build (Alex) Signed-off-by: Marcelo Mendes Spessoto Junior Signed-off-by: Alex Deucher

drm/amd/display: Drop CONFIG_DRM_AMD_DC_HDCP

2023-03-07T19:22:39+00:00

[Why & How] There is no reason we still need a config option for this. Reviewed-by: Wenjing Liu Acked-by: Qingqing Zhuo Signed-off-by: Harry Wentland Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: add authentication_complete in hdcp output

2021-08-09T19:43:33+00:00

[why] DM needs to be notified when hdcp module has completed authentication attempt. Reviewed-by: Bhawanpreet Lakha Reviewed-by: George Shen Acked-by: Anson Jacob Signed-off-by: Wenjing Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Don't log hdcp module warnings in dmesg

2020-09-17T04:13:34+00:00

[Why] DTM topology updates happens by default now. This results in DTM warnings when hdcp is not even being enabled. This spams the dmesg and doesn't effect normal display functionality so it is better to log it using DRM_DEBUG_KMS() [How] Change the DRM_WARN() to DRM_DEBUG_KMS() Signed-off-by: Bhawanpreet Lakha Acked-by: Alex Deucher Reviewed-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amd/display: Add stay count and bstatus to HDCP log

2020-03-09T17:48:59+00:00

[Why] So the values of stay count and bstatus can be easily viewed during debugging. [How] Add stay count and bstatus values to be outputted in HDCP log Signed-off-by: Isabel Zhang Reviewed-by: Wenjing Liu Acked-by: Rodrigo Siqueira Signed-off-by: Alex Deucher

drm/amd/display: update HDCP DTM immediately after hardware programming

2020-02-12T21:01:46+00:00

[why] HDCP DTM needs to be aware of the upto date display topology information in order to validate hardware consistency. [how] update HDCP DTM on update_stream_config call. Signed-off-by: Wenjing Liu Reviewed-by: Jun Lei Signed-off-by: Alex Deucher

drm/amd/display: Change ERROR to WARN for HDCP module

2019-11-19T15:12:53+00:00

[Why] HDCP is a bit finicky so we try it 3 times, this leads to a case where if we fail the first time and pass the second time the error is still shown in dmesg for the first failed attempt. This leads to false positive errors. [How] Change the logging from ERROR to WARNING. Warnings are still shown in dmesg to know what went wrong. Signed-off-by: Bhawanpreet Lakha Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amd/display: Add logging for HDCP2.2

2019-11-19T15:12:53+00:00

[Why] We need to log the state changes for 2.2 This patch extends the existing logging functions to handle HDCP2.2. [How] We do this by adding if/else in the defines, and output the log based on the hdcp version Signed-off-by: Bhawanpreet Lakha Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amd/display: Add HDCP module

2019-10-03T14:10:58+00:00

This module manages HDCP for amdgpu driver. The module behaves as a state machine which handles the different authentication states of HDCP The module is divided into 3 major components +--------+ | Hdcp.c | +--------+ Manages the state machine, sends the events to be executed and communicates with the dm +-----------+ |Execution.c| +-----------+ This executes events based on the current state. Also generates execution results as transition inputs +------------+ |Transition.c| +------------+ Decides the next state based on the input and makes requests to hdcp.c to handle. +-------------+ ------> | Execution.c | ------ | +-------------+ | | V +----+ +--------+ +--------------+ | DM | -----> | Hdcp.c | <------------ | Transition.c | +----+ <----- +--------+ +--------------+ v2: Drop unused function definitions Signed-off-by: Bhawanpreet Lakha Signed-off-by: Wenjing Liu Reviewed-by: Wenjing Liu Acked-by: Harry Wentland Signed-off-by: Alex Deucher