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drm/i915/alpm: Add debugfs for LOBF

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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@intel.com>
Signed-off-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240529200742.1694401-7-animesh.manna@intel.com
This commit is contained in:
Animesh Manna
2024-05-30 01:37:42 +05:30
parent 5a9b255fdb
commit 42493f7cb2
3 changed files with 53 additions and 0 deletions
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49
drivers/gpu/drm/i915/display/intel_alpm.c
View File

@@ -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);
}

2
drivers/gpu/drm/i915/display/intel_alpm.h
View File

@@ -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

2
drivers/gpu/drm/i915/display/intel_display_debugfs.c
View File

@@ -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 ||