From: "Leo (Hanghong) Ma" <hanghong.ma@xxxxxxx>
[Why]
We want to have a debugfs interface to enable or disable DMCUB
trace buffer events.
[How]
Add debugfs interface to enable or disable trace buffer events.
Signed-off-by: Leo (Hanghong) Ma <hanghong.ma@xxxxxxx>
Reviewed-by: Harry Wentland <Harry.Wentland@xxxxxxx>
Acked-by: Solomon Chiu <solomon.chiu@xxxxxxx>
---
.../gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h | 1 +
.../amd/display/amdgpu_dm/amdgpu_dm_debugfs.c | 37 +++++++++++++++++++
2 files changed, 38 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index be931efc772d..2c9eed78f6df 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -395,6 +395,7 @@ struct amdgpu_display_manager {
*/
struct amdgpu_encoder mst_encoders[AMDGPU_DM_MAX_CRTC];
bool force_timing_sync;
+ bool dmcub_trace_event_en;
/**
* @da_list:
*
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
index b8644f49e0f2..927de7678a4f 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -34,6 +34,7 @@
#include "resource.h"
#include "dsc.h"
#include "dc_link_dp.h"
+#include "dc/dc_dmub_srv.h"
struct dmub_debugfs_trace_header {
uint32_t entry_count;
@@ -2490,6 +2491,39 @@ static int psr_get(void *data, u64 *val)
return 0;
}
+/*
+ * Set dmcub trace event IRQ enable or disable.
+ * Usage to enable dmcub trace event IRQ: echo 1 > /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
+ * Usage to disable dmcub trace event IRQ: echo 0 > /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
+ */
+static int dmcub_trace_event_state_set(void *data, u64 val)
+{
+ struct amdgpu_device *adev = data;
+
+ if (val == 1 || val == 0) {
+ dc_dmub_trace_event_control(adev->dm.dc, val);
+ adev->dm.dmcub_trace_event_en = (bool)val;
+ } else
+ return 0;
+
+ return 0;
+}
+
+/*
+ * The interface doesn't need get function, so it will return the
+ * value of zero
+ * Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_dmcub_trace_event_en
+ */
+static int dmcub_trace_event_state_get(void *data, u64 *val)
+{
+ struct amdgpu_device *adev = data;
+
+ *val = adev->dm.dmcub_trace_event_en;
+ return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(dmcub_trace_event_state_fops, dmcub_trace_event_state_get,
+ dmcub_trace_event_state_set, "%llu\n");
DEFINE_DEBUGFS_ATTRIBUTE(psr_fops, psr_get, NULL, "%llu\n");
@@ -2970,4 +3004,7 @@ void dtn_debugfs_init(struct amdgpu_device *adev)
debugfs_create_file_unsafe("amdgpu_dm_force_timing_sync", 0644, root,
adev, &force_timing_sync_ops);
+
+ debugfs_create_file_unsafe("amdgpu_dm_dmcub_trace_event_en", 0644, root,
+ adev, &dmcub_trace_event_state_fops);
}
--
2.29.0
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