diff options
| author | Dominik Kaszewski <dominik.kaszewski@amd.com> | 2025-03-27 20:39:51 +0100 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-04-07 18:01:07 -0400 |
| commit | ce801e5d6c1bac228bf10f75e8bede4285c58282 (patch) | |
| tree | 4678936e6114f90e9783eb8f2c5b49ebd4ded100 /drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | |
| parent | drm/amd/display: Correct SSC enable detection for DCN351 (diff) | |
| download | linux-ce801e5d6c1bac228bf10f75e8bede4285c58282.tar.gz linux-ce801e5d6c1bac228bf10f75e8bede4285c58282.zip | |
drm/amd/display: HDCP Locality check using DMUB Fused IO
[Why]
HDCP locality check has strict timing requirements, currently broken
due to reliance on msleep which does not guarantee accuracy.
The PR moves the write-poll-read sequence into DMUB using new generic
Fused IO interface, where the timing accuracy is greatly improved.
New flow is enabled using DCN resource capability bit (none for now),
or using a debug flag.
[How]
* Extended mod_hdcp_config with new function for requesting DMUB
to execute a sequence of fused I2C/AUX commands and synchronously
wait until an outbox reply arrives or a timeout expires.
* If the timeout expires, send an abort to DMUB.
* Update HDCP to use the DMUB for locality check if supported.
* Add DC_HDCP_LC_FORCE_FW_ENABLE and DC_HDCP_LC_ENABLE_SW_FALLBACK.
* Make the first enable new flow regardless of resource capabilities.
* Make the second enable fallback to old SW flow.
* Clean up makefile source file listings for easier updates.
Reviewed-by: Alvin Lee <alvin.lee2@amd.com>
Signed-off-by: Dominik Kaszewski <dominik.kaszewski@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c index 2cd35392e2da..62954b351ebd 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c @@ -630,6 +630,19 @@ bool dm_helpers_submit_i2c( return result; } +bool dm_helpers_execute_fused_io( + struct dc_context *ctx, + struct dc_link *link, + union dmub_rb_cmd *commands, + uint8_t count, + uint32_t timeout_us +) +{ + struct amdgpu_device *dev = ctx->driver_context; + + return amdgpu_dm_execute_fused_io(dev, link, commands, count, timeout_us); +} + static bool execute_synaptics_rc_command(struct drm_dp_aux *aux, bool is_write_cmd, unsigned char cmd, |