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authorBhanuprakash Modem <bhanuprakash.modem@intel.com>2020-06-22 19:55:18 +0530
committerManasi Navare <manasi.d.navare@intel.com>2020-06-25 15:47:14 -0700
commit41752663b410c6265e24ff0570350b0b05ecdafe (patch)
tree6ea7e74641e248bc15e8ab9c58cd795e3773aea3 /drivers/gpu/drm/drm_debugfs.c
parent6b86a1224af8b369d34a41b0954d9eeabd6f35ef (diff)
drm/debug: Expose connector VRR monitor range via debugfs
[Why] It's useful to know the min and max vrr range for IGT testing. [How] Expose the min and max vfreq for the connector via a debugfs file on the connector, "vrr_range". Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range v2: * Fix the typo in max_vfreq (Manasi) * Change the name of node to i915_vrr_info so we can add other vrr info for more debug info (Manasi) * Change the VRR capable to display Yes or No (Manasi) * Fix indentation checkpatch errors (Manasi) v3: * Remove the unnecessary debug print (Manasi) v4: * Rebase v5: * Rename to vrr_range to match AMD debugfs v6: * Rebase (manasi) v7: * Fix cmpilation due to rebase v8: * Move debugfs node creation logic to DRM (Emil) * Remove AMD specific logic (Emil) v9: * Separate patch for removal of AMD specific logic (Manasi) Signed-off-by: Bhanuprakash Modem <bhanuprakash.modem@intel.com> Signed-off-by: Manasi Navare <manasi.d.navare@intel.com> Cc: Jani Nikula <jani.nikula@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Harry Wentland <harry.wentland@amd.com> CC: Emil Velikov <emil.l.velikov@gmail.com> Reviewed-by: Manasi Navare <manasi.d.navare@intel.com> Signed-off-by: Manasi Navare <manasi.d.navare@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200622142519.16214-3-bhanuprakash.modem@intel.com
Diffstat (limited to 'drivers/gpu/drm/drm_debugfs.c')
-rw-r--r--drivers/gpu/drm/drm_debugfs.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
index bfe4602f206b..3d7182001004 100644
--- a/drivers/gpu/drm/drm_debugfs.c
+++ b/drivers/gpu/drm/drm_debugfs.c
@@ -376,6 +376,24 @@ static ssize_t edid_write(struct file *file, const char __user *ubuf,
return (ret) ? ret : len;
}
+/*
+ * Returns the min and max vrr vfreq through the connector's debugfs file.
+ * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
+ */
+static int vrr_range_show(struct seq_file *m, void *data)
+{
+ struct drm_connector *connector = m->private;
+
+ if (connector->status != connector_status_connected)
+ return -ENODEV;
+
+ seq_printf(m, "Min: %u\n", (u8)connector->display_info.monitor_range.min_vfreq);
+ seq_printf(m, "Max: %u\n", (u8)connector->display_info.monitor_range.max_vfreq);
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(vrr_range);
+
static const struct file_operations drm_edid_fops = {
.owner = THIS_MODULE,
.open = edid_open,
@@ -413,6 +431,10 @@ void drm_debugfs_connector_add(struct drm_connector *connector)
/* edid */
debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root, connector,
&drm_edid_fops);
+
+ /* vrr range */
+ debugfs_create_file("vrr_range", S_IRUGO, root, connector,
+ &vrr_range_fops);
}
void drm_debugfs_connector_remove(struct drm_connector *connector)