From: Vandana Kannan <vandana.kannan@xxxxxxxxx>
Adding a debugfs entry to determine if DRRS is supported or not
V2: [By Ram]: Following details about the active crtc will be filled
in seq-file of the debugfs
1. Encoder output type
2. DRRS Support on this CRTC
3. DRRS current state
4. Current Vrefresh
Format is as follows:
CRTC 1: Output: eDP, DRRS Supported: Yes (Seamless), DRRS_State: DRRS_HIGH_RR, Vrefresh: 60
CRTC 2: Output: HDMI, DRRS Supported : No, VBT DRRS_type: Seamless
CRTC 1: Output: eDP, DRRS Supported: Yes (Seamless), DRRS_State: DRRS_LOW_RR, Vrefresh: 40
CRTC 2: Output: HDMI, DRRS Supported : No, VBT DRRS_type: Seamless
V3: [By Ram]: Readability is improved.
Another error case is covered [Daniel]
V4: [By Ram]: Current status of the Idleness DRRS along with
the Front buffer bits are added to the debugfs. [Rodrigo]
V5: [By Ram]: Rephrased to make it easy to understand.
And format is modified. [Rodrigo]
Signed-off-by: Vandana Kannan <vandana.kannan@xxxxxxxxx>
Signed-off-by: Ramalingam C <ramalingam.c@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 113 +++++++++++++++++++++++++++++++++++
1 file changed, 113 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 164fa82..e51001c 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2869,6 +2869,118 @@ static int i915_ddb_info(struct seq_file *m, void *unused)
return 0;
}
+static void drrs_status_per_crtc(struct seq_file *m,
+ struct drm_device *dev, struct intel_crtc *intel_crtc)
+{
+ struct intel_encoder *intel_encoder;
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct i915_drrs *drrs = &dev_priv->drrs;
+ int vrefresh = 0;
+ u32 work_status;
+
+ for_each_encoder_on_crtc(dev, &intel_crtc->base, intel_encoder) {
+ /* Encoder connected on this CRTC */
+ switch (intel_encoder->type) {
+ case INTEL_OUTPUT_EDP:
+ seq_puts(m, "eDP:\n");
+ break;
+ case INTEL_OUTPUT_DSI:
+ seq_puts(m, "DSI:\n");
+ break;
+ case INTEL_OUTPUT_HDMI:
+ seq_puts(m, "HDMI:\n");
+ break;
+ case INTEL_OUTPUT_DISPLAYPORT:
+ seq_puts(m, "DP:\n");
+ break;
+ default:
+ seq_printf(m, "Other encoder (id=%d).\n",
+ intel_encoder->type);
+ return;
+ }
+ }
+
+ if (dev_priv->vbt.drrs_type == STATIC_DRRS_SUPPORT)
+ seq_puts(m, "\tVBT: DRRS_type: Static");
+ else if (dev_priv->vbt.drrs_type == SEAMLESS_DRRS_SUPPORT)
+ seq_puts(m, "\tVBT: DRRS_type: Seamless");
+ else if (dev_priv->vbt.drrs_type == DRRS_NOT_SUPPORTED)
+ seq_puts(m, "\tVBT: DRRS_type: None");
+ else
+ seq_puts(m, "\tVBT: DRRS_type: FIXME: Unrecognized Value");
+
+ seq_puts(m, "\n\n");
+
+ if (intel_crtc->config->has_drrs) {
+ struct intel_panel *panel;
+
+ panel = &drrs->dp->attached_connector->panel;
+ /* DRRS Supported */
+ seq_puts(m, "\tDRRS Supported: Yes\n");
+ seq_printf(m, "\t\tBusy_frontbuffer_bits: 0x%X",
+ drrs->busy_frontbuffer_bits);
+
+ seq_puts(m, "\n\t\t");
+ work_status = work_busy(&drrs->work.work);
+ if (drrs->busy_frontbuffer_bits) {
+ seq_puts(m, "Front buffer: Busy.\n");
+ seq_puts(m, "\t\tIdleness DRRS: Disabled");
+ } else {
+ seq_puts(m, "Front buffer: Idle");
+ seq_puts(m, "\n\t\t");
+ if (drrs->refresh_rate_type == DRRS_HIGH_RR) {
+ if (work_status)
+ seq_puts(m, "Idleness DRRS: Enabled");
+ else
+ seq_puts(m, "Idleness DRRS: Disabled");
+ } else if (drrs->refresh_rate_type == DRRS_LOW_RR) {
+ seq_puts(m, "Idleness DRRS: Enabled");
+ }
+ }
+
+ seq_puts(m, "\n\t\t");
+ if (drrs->refresh_rate_type == DRRS_HIGH_RR) {
+ seq_puts(m, "DRRS_State: DRRS_HIGH_RR\n");
+ vrefresh = panel->fixed_mode->vrefresh;
+ } else if (drrs->refresh_rate_type == DRRS_LOW_RR) {
+ seq_puts(m, "DRRS_State: DRRS_LOW_RR\n");
+ vrefresh = panel->downclock_mode->vrefresh;
+ } else {
+ seq_printf(m, "DRRS_State: Unknown(%d)\n",
+ drrs->refresh_rate_type);
+ return;
+ }
+ seq_printf(m, "\t\tVrefresh: %d", vrefresh);
+
+ } else {
+ /* DRRS not supported. Print the VBT parameter*/
+ seq_puts(m, "\tDRRS Supported : No");
+ }
+ seq_puts(m, "\n");
+}
+
+static int i915_drrs_status(struct seq_file *m, void *unused)
+{
+ struct drm_info_node *node = m->private;
+ struct drm_device *dev = node->minor->dev;
+ struct intel_crtc *intel_crtc;
+ int active_crtc_cnt = 0;
+
+ for_each_intel_crtc(dev, intel_crtc) {
+ if (intel_crtc->active) {
+ active_crtc_cnt++;
+ seq_printf(m, "\nCRTC %d: ", active_crtc_cnt);
+
+ drrs_status_per_crtc(m, dev, intel_crtc);
+ }
+ }
+
+ if (!active_crtc_cnt)
+ seq_puts(m, "No active crtc found\n");
+
+ return 0;
+}
+
struct pipe_crc_info {
const char *name;
struct drm_device *dev;
@@ -4483,6 +4595,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
{"i915_dp_mst_info", i915_dp_mst_info, 0},
{"i915_wa_registers", i915_wa_registers, 0},
{"i915_ddb_info", i915_ddb_info, 0},
+ {"i915_drrs_status", i915_drrs_status, 0},
};
#define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)
--
1.7.9.5
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