drm/amd/display: Add ips status info to debugfs

[Why]
For debugging and testing purposes.

[How]
If IPS is supported create ips_status debugfs entry.
Usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_ips_status

Reviewed-by: Jerry Zuo <jerry.zuo@amd.com>
Acked-by: Roman Li <roman.li@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>

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 7d97fdd9da922da5b4a04a2d9573457e07e9b516..27d5c6077630134e6e9c4b08842a89c1a6eed242 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
@@ -2670,6 +2670,49 @@ unlock:
        return size;
 }
 
+/*
+ * IPS status.  Read only.
+ *
+ * Example usage: cat /sys/kernel/debug/dri/0/amdgpu_dm_ips_status
+ */
+static int ips_status_show(struct seq_file *m, void *unused)
+{
+       struct amdgpu_device *adev = m->private;
+       struct dc *dc = adev->dm.dc;
+       struct dc_dmub_srv *dc_dmub_srv;
+
+       seq_printf(m, "IPS config: %d\n", dc->config.disable_ips);
+       seq_printf(m, "Idle optimization: %d\n", dc->idle_optimizations_allowed);
+
+       if (adev->dm.idle_workqueue) {
+               seq_printf(m, "Idle workqueue - enabled: %d\n", adev->dm.idle_workqueue->enable);
+               seq_printf(m, "Idle workqueue - running: %d\n", adev->dm.idle_workqueue->running);
+       }
+
+       dc_dmub_srv = dc->ctx->dmub_srv;
+       if (dc_dmub_srv && dc_dmub_srv->dmub) {
+               uint32_t rcg_count, ips1_count, ips2_count;
+               volatile const struct dmub_shared_state_ips_fw *ips_fw =
+                       &dc_dmub_srv->dmub->shared_state[DMUB_SHARED_SHARE_FEATURE__IPS_FW].data.ips_fw;
+               rcg_count = ips_fw->rcg_entry_count;
+               ips1_count = ips_fw->ips1_entry_count;
+               ips2_count = ips_fw->ips2_entry_count;
+               seq_printf(m, "entry counts: rcg=%u ips1=%u ips2=%u\n",
+                          rcg_count,
+                          ips1_count,
+                          ips2_count);
+               rcg_count = ips_fw->rcg_exit_count;
+               ips1_count = ips_fw->ips1_exit_count;
+               ips2_count = ips_fw->ips2_exit_count;
+               seq_printf(m, "exit counts: rcg=%u ips1=%u ips2=%u",
+                          rcg_count,
+                          ips1_count,
+                          ips2_count);
+               seq_puts(m, "\n");
+       }
+       return 0;
+}
+
 /*
  * Backlight at this moment.  Read only.
  * As written to display, taking ABM and backlight lut into account.
@@ -3240,6 +3283,7 @@ DEFINE_DEBUGFS_ATTRIBUTE(disallow_edp_enter_psr_fops,
 
 DEFINE_SHOW_ATTRIBUTE(current_backlight);
 DEFINE_SHOW_ATTRIBUTE(target_backlight);
+DEFINE_SHOW_ATTRIBUTE(ips_status);
 
 static const struct {
        char *name;
@@ -4129,4 +4173,7 @@ void dtn_debugfs_init(struct amdgpu_device *adev)
        debugfs_create_file_unsafe("amdgpu_dm_disable_hpd", 0644, root, adev,
                                   &disable_hpd_ops);
 
+       if (adev->dm.dc->caps.ips_support)
+               debugfs_create_file_unsafe("amdgpu_dm_ips_status", 0644, root, adev,
+                                          &ips_status_fops);
 }