For validation purpose add debugfs for LOBF.
v1: Initial version.
v2: Add aux-wake/less info along with lobf status. [Jouni]
Reviewed-by: Jouni Högander <jouni.hogander@xxxxxxxxx>
Signed-off-by: Animesh Manna <animesh.manna@xxxxxxxxx>
---
drivers/gpu/drm/i915/display/intel_alpm.c | 49 +++++++++++++++++++
drivers/gpu/drm/i915/display/intel_alpm.h | 2 +
.../drm/i915/display/intel_display_debugfs.c | 2 +
3 files changed, 53 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_alpm.c b/drivers/gpu/drm/i915/display/intel_alpm.c
index a8ae5f65a250..a26716c14aa3 100644
--- a/drivers/gpu/drm/i915/display/intel_alpm.c
+++ b/drivers/gpu/drm/i915/display/intel_alpm.c
@@ -360,3 +360,52 @@ void intel_alpm_configure(struct intel_dp *intel_dp,
{
lnl_alpm_configure(intel_dp, crtc_state);
}
+
+static int i915_edp_lobf_info_show(struct seq_file *m, void *data)
+{
+ struct intel_connector *connector = m->private;
+ struct drm_i915_private *dev_priv = to_i915(connector->base.dev);
+ struct drm_crtc *crtc;
+ struct intel_crtc_state *crtc_state;
+ enum transcoder cpu_transcoder;
+ u32 alpm_ctl;
+ int ret;
+
+ ret = drm_modeset_lock_single_interruptible(&dev_priv->drm.mode_config.connection_mutex);
+ if (ret)
+ return ret;
+
+ crtc = connector->base.state->crtc;
+ if (connector->base.status != connector_status_connected || !crtc) {
+ ret = -ENODEV;
+ goto out;
+ }
+
+ crtc_state = to_intel_crtc_state(crtc->state);
+ cpu_transcoder = crtc_state->cpu_transcoder;
+ alpm_ctl = intel_de_read(dev_priv, ALPM_CTL(dev_priv, cpu_transcoder));
+ seq_printf(m, "LOBF status: %s\n", str_enabled_disabled(alpm_ctl & ALPM_CTL_LOBF_ENABLE));
+ seq_printf(m, "Aux-wake alpm status: %s\n",
+ str_enabled_disabled(!(alpm_ctl & ALPM_CTL_ALPM_AUX_LESS_ENABLE)));
+ seq_printf(m, "Aux-less alpm status: %s\n",
+ str_enabled_disabled(alpm_ctl & ALPM_CTL_ALPM_AUX_LESS_ENABLE));
+out:
+ drm_modeset_unlock(&dev_priv->drm.mode_config.connection_mutex);
+
+ return ret;
+}
+
+DEFINE_SHOW_ATTRIBUTE(i915_edp_lobf_info);
+
+void intel_alpm_lobf_debugfs_add(struct intel_connector *connector)
+{
+ struct drm_i915_private *i915 = to_i915(connector->base.dev);
+ struct dentry *root = connector->base.debugfs_entry;
+
+ if (DISPLAY_VER(i915) < 20 ||
+ connector->base.connector_type != DRM_MODE_CONNECTOR_eDP)
+ return;
+
+ debugfs_create_file("i915_edp_lobf_info", 0444, root,
+ connector, &i915_edp_lobf_info_fops);
+}
diff --git a/drivers/gpu/drm/i915/display/intel_alpm.h b/drivers/gpu/drm/i915/display/intel_alpm.h
index 80b9ca086a49..c82ecc7b4001 100644
--- a/drivers/gpu/drm/i915/display/intel_alpm.h
+++ b/drivers/gpu/drm/i915/display/intel_alpm.h
@@ -11,6 +11,7 @@
struct intel_dp;
struct intel_crtc_state;
struct drm_connector_state;
+struct intel_connector;
void intel_alpm_init_dpcd(struct intel_dp *intel_dp);
bool intel_alpm_compute_params(struct intel_dp *intel_dp,
@@ -20,4 +21,5 @@ void intel_alpm_lobf_compute_config(struct intel_dp *intel_dp,
struct drm_connector_state *conn_state);
void intel_alpm_configure(struct intel_dp *intel_dp,
const struct intel_crtc_state *crtc_state);
+void intel_alpm_lobf_debugfs_add(struct intel_connector *connector);
#endif
diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 35f9f86ef70f..86d9900c40af 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -13,6 +13,7 @@
#include "i915_debugfs.h"
#include "i915_irq.h"
#include "i915_reg.h"
+#include "intel_alpm.h"
#include "intel_crtc.h"
#include "intel_de.h"
#include "intel_crtc_state_dump.h"
@@ -1515,6 +1516,7 @@ void intel_connector_debugfs_add(struct intel_connector *connector)
intel_drrs_connector_debugfs_add(connector);
intel_pps_connector_debugfs_add(connector);
intel_psr_connector_debugfs_add(connector);
+ intel_alpm_lobf_debugfs_add(connector);
if (connector_type == DRM_MODE_CONNECTOR_DisplayPort ||
connector_type == DRM_MODE_CONNECTOR_HDMIA ||
--
2.29.0
