From 7ce34cbfab26c04c969a32196fbba0f2c6191cb5 Mon Sep 17 00:00:00 2001 From: Stylon Wang Date: Fri, 30 Jun 2023 16:46:09 +0800 Subject: [PATCH] drm/amd/display: Enable DPIA trace with DC debug mask [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 Acked-by: Tom Chung Signed-off-by: Stylon Wang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index e3d3af0435ce..ae83275b6d5f 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -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"); -- 2.25.1