New i915_pm_lpsp igt solution approach relies on connector specific
debugfs attribute i915_lpsp_info, it exposes whether an output is
capable of driving lpsp and exposes lpsp enablement info.
v2:
- CI fixup.
v3:
- register i915_lpsp_info only for supported connector. [Jani]
- use intel_display_power_well_is_enabled() instead of looking
inside power_well count. [Jani]
- fixes the lpsp capable conditional logic. [Jani]
- combined the lpsp capable and enable info. [Jani]
Signed-off-by: Anshuman Gupta <anshuman.gupta@xxxxxxxxx>
---
.../drm/i915/display/intel_display_debugfs.c | 124 ++++++++++++++++++
.../drm/i915/display/intel_display_power.h | 2 +
2 files changed, 126 insertions(+)
diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
index 424f4e52f783..b185c4617468 100644
--- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c
+++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c
@@ -9,6 +9,7 @@
#include "i915_debugfs.h"
#include "intel_csr.h"
#include "intel_display_debugfs.h"
+#include "intel_display_power.h"
#include "intel_display_types.h"
#include "intel_dp.h"
#include "intel_fbc.h"
@@ -611,6 +612,98 @@ static void intel_hdcp_info(struct seq_file *m,
seq_puts(m, "\n");
}
+#define LPSP_CAPABLE(COND) (COND ? seq_puts(m, "LPSP capable\n") : seq_puts(m, "LPSP incapable\n"))
+#define LPSP_ENABLE(COND) (COND ? seq_puts(m, "LPSP enabled\n") : seq_puts(m, "LPSP disabled\n"))
+
+/* LVDS also an embedded panel but we are not interested in it */
+static bool intel_have_embedded_panel(struct drm_connector *connector)
+{
+ return connector->connector_type == DRM_MODE_CONNECTOR_DSI ||
+ connector->connector_type == DRM_MODE_CONNECTOR_eDP;
+}
+
+static bool intel_have_gen9_lpsp_panel(struct drm_connector *connector)
+{
+ return intel_have_embedded_panel(connector) ||
+ connector->connector_type == DRM_MODE_CONNECTOR_DisplayPort;
+}
+
+static bool intel_have_lpsp_supported_panel(struct drm_connector *connector)
+{
+ return intel_have_gen9_lpsp_panel(connector) ||
+ connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
+ connector->connector_type == DRM_MODE_CONNECTOR_HDMIB;
+}
+
+static bool
+intel_lpsp_power_well_enabled(struct drm_i915_private *dev_priv,
+ enum i915_power_well_id power_well_id)
+{
+ intel_wakeref_t wakeref;
+ bool is_enabled;
+
+ wakeref = intel_runtime_pm_get(&dev_priv->runtime_pm);
+ is_enabled = intel_display_power_well_is_enabled(dev_priv,
+ power_well_id);
+ intel_runtime_pm_put(&dev_priv->runtime_pm, wakeref);
+
+ return is_enabled;
+}
+
+static void
+intel_lpsp_gen12_helper(struct seq_file *m, struct drm_connector *connector)
+{
+ struct intel_encoder *encoder =
+ intel_attached_encoder(to_intel_connector(connector));
+ struct drm_i915_private *dev_priv = to_i915(connector->dev);
+ bool lpsp_capable = false;
+
+ if (IS_TIGERLAKE(dev_priv))
+ lpsp_capable = encoder->port <= PORT_C;
+
+ LPSP_CAPABLE(lpsp_capable);
+ LPSP_ENABLE(!intel_lpsp_power_well_enabled(dev_priv, ICL_DISP_PW_3));
+}
+
+static void
+intel_lpsp_gen11_helper(struct seq_file *m, struct drm_connector *connector)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->dev);
+
+ LPSP_CAPABLE(intel_have_embedded_panel(connector));
+ LPSP_ENABLE(!intel_lpsp_power_well_enabled(dev_priv, ICL_DISP_PW_3));
+}
+
+static void
+intel_lpsp_gen9_helper(struct seq_file *m, struct drm_connector *connector)
+{
+ struct intel_encoder *encoder =
+ intel_attached_encoder(to_intel_connector(connector));
+ struct drm_i915_private *dev_priv = to_i915(connector->dev);
+
+ LPSP_CAPABLE(encoder->port == PORT_A &&
+ intel_have_gen9_lpsp_panel(connector));
+ LPSP_ENABLE(!intel_lpsp_power_well_enabled(dev_priv, SKL_DISP_PW_2));
+}
+
+static void
+intel_lpsp_legacy_gen_helper(struct seq_file *m,
+ struct drm_connector *connector)
+{
+ struct drm_i915_private *dev_priv = to_i915(connector->dev);
+
+ /*
+ * Apart from HASWELL/BROADWELL other legacy platform doesn't
+ * support lpsp.
+ */
+ if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) {
+ LPSP_CAPABLE(connector->connector_type == DRM_MODE_CONNECTOR_eDP);
+ LPSP_ENABLE(!intel_lpsp_power_well_enabled(dev_priv, HSW_DISP_PW_GLOBAL));
+ } else {
+ seq_puts(m, "LPSP not supported\n");
+ }
+}
+
static void intel_dp_info(struct seq_file *m,
struct intel_connector *intel_connector)
{
@@ -1987,6 +2080,33 @@ static int i915_hdcp_sink_capability_show(struct seq_file *m, void *data)
}
DEFINE_SHOW_ATTRIBUTE(i915_hdcp_sink_capability);
+static int i915_lpsp_info_show(struct seq_file *m, void *data)
+{
+ struct drm_connector *connector = m->private;
+ struct drm_i915_private *dev_priv = to_i915(connector->dev);
+
+ if (connector->status != connector_status_connected)
+ return -ENODEV;
+
+ switch (INTEL_GEN(dev_priv)) {
+ case 12:
+ intel_lpsp_gen12_helper(m, connector);
+ break;
+ case 11:
+ intel_lpsp_gen11_helper(m, connector);
+ break;
+ case 10:
+ case 9:
+ intel_lpsp_gen9_helper(m, connector);
+ break;
+ default:
+ intel_lpsp_legacy_gen_helper(m, connector);
+ }
+
+ return 0;
+}
+DEFINE_SHOW_ATTRIBUTE(i915_lpsp_info);
+
static int i915_dsc_fec_support_show(struct seq_file *m, void *data)
{
struct drm_connector *connector = m->private;
@@ -2130,5 +2250,9 @@ int intel_connector_debugfs_add(struct drm_connector *connector)
debugfs_create_file("i915_dsc_fec_support", S_IRUGO, root,
connector, &i915_dsc_fec_support_fops);
+ if (intel_have_lpsp_supported_panel(connector))
+ debugfs_create_file("i915_lpsp_info", 0444, root,
+ connector, &i915_lpsp_info_fops);
+
return 0;
}
diff --git a/drivers/gpu/drm/i915/display/intel_display_power.h b/drivers/gpu/drm/i915/display/intel_display_power.h
index 56cbae6327b7..14c5ad20287f 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.h
+++ b/drivers/gpu/drm/i915/display/intel_display_power.h
@@ -266,6 +266,8 @@ intel_display_power_domain_str(enum intel_display_power_domain domain);
bool intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
enum intel_display_power_domain domain);
+bool intel_display_power_well_is_enabled(struct drm_i915_private *dev_priv,
+ enum i915_power_well_id power_well_id);
bool __intel_display_power_is_enabled(struct drm_i915_private *dev_priv,
enum intel_display_power_domain domain);
intel_wakeref_t intel_display_power_get(struct drm_i915_private *dev_priv,
--
2.26.0
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