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drm/amd/display: Enable DPIA trace with DC debug mask

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[Why]
DPIA traces from DMUB is not enabled by default, which is
less convenient to debug DPIA related issues because we have
to resort to other means to enable DPIA trace.

[How]
Reuse existing DC debug mask to enable DPIA trace log from
kernel command line. This makes debugging DPIA issues easier
especially when system power state (suspend/reboot) is involved.

To turn on DPIA trace, simply add "amdgpu.dcdebugmask=0x80" to
kernel command line.

Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Stylon Wang <stylon.wang@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Stylon Wang
2023-06-30 16:46:09 +08:00
committed by Alex Deucher
parent 71ba6b577a
commit 7ce34cbfab
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@@ -1822,9 +1822,14 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
* It is expected that DMUB will resend any pending notifications at this point, for
* example HPD from DPIA.
*/
if (dc_is_dmub_outbox_supported(adev->dm.dc))
if (dc_is_dmub_outbox_supported(adev->dm.dc)) {
dc_enable_dmub_outbox(adev->dm.dc);
/* DPIA trace goes to dmesg logs only if outbox is enabled */
if (amdgpu_dc_debug_mask & DC_ENABLE_DPIA_TRACE)
dc_dmub_srv_enable_dpia_trace(adev->dm.dc);
}
if (amdgpu_dm_initialize_drm_device(adev)) {
DRM_ERROR(
"amdgpu: failed to initialize sw for display support.\n");