Knob to control ignoring the long hpds. Set this to true will
start ignoring the long HPDs generated by the displays. Useful
for use cases like CI systems where we dont expect to disconnect
the panels.
v2: Address patch styling comments (Jani Nikula)
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_hotplug.c | 25 ++++++++++++++++++++
1 file changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c
index f0a2aa648bb8..41372a10288c 100644
--- a/drivers/gpu/drm/i915/display/intel_hotplug.c
+++ b/drivers/gpu/drm/i915/display/intel_hotplug.c
@@ -939,6 +939,29 @@ static const struct file_operations i915_hpd_short_storm_ctl_fops = {
.write = i915_hpd_short_storm_ctl_write,
};
+static int i915_ignore_long_hpd_set(void *data, u64 val)
+{
+ struct drm_i915_private *i915 = data;
+
+ drm_dbg_kms(&i915->drm, "Ignoring long HPDs: %s\n", str_yes_no(val));
+
+ i915->display.hotplug.ignore_long_hpd = val;
+
+ return 0;
+}
+
+static int i915_ignore_long_hpd_get(void *data, u64 *val)
+{
+ struct drm_i915_private *i915 = data;
+
+ *val = i915->display.hotplug.ignore_long_hpd;
+
+ return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(i915_ignore_long_hpd_fops, i915_ignore_long_hpd_get,
+ i915_ignore_long_hpd_set, "%llu\n");
+
void intel_hpd_debugfs_register(struct drm_i915_private *i915)
{
struct drm_minor *minor = i915->drm.primary;
@@ -947,4 +970,6 @@ void intel_hpd_debugfs_register(struct drm_i915_private *i915)
i915, &i915_hpd_storm_ctl_fops);
debugfs_create_file("i915_hpd_short_storm_ctl", 0644, minor->debugfs_root,
i915, &i915_hpd_short_storm_ctl_fops);
+ debugfs_create_file("i915_ignore_long_hpd", 0644, minor->debugfs_root,
+ i915, &i915_ignore_long_hpd_fops);
}
--
2.34.1
