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drm/i915: Add debugfs entry for DRRS

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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]

V6: [By Ram]: Modeset mutex are acquired for each crtc along with
	renaming the Idleness detection states  [Daniel]

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
[danvet: dump full busy_frontbuffer_bits and remove the dubios
computed logical state of DRRS - debugfs is about what is fact,
developers should reach their own conclusion when debugging issues.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Vandana Kannan 2015-03-03 20:53:10 +05:30 committed by Daniel Vetter
parent 27cd44618b
commit a54746e39a
1 changed files with 110 additions and 0 deletions
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110
drivers/gpu/drm/i915/i915_debugfs.c
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@ -2870,6 +2870,115 @@ 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;
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;
mutex_lock(&drrs->mutex);
/* DRRS Supported */
seq_puts(m, "\tDRRS Supported: Yes\n");
/* disable_drrs() will make drrs->dp NULL */
if (!drrs->dp) {
seq_puts(m, "Idleness DRRS: Disabled");
mutex_unlock(&drrs->mutex);
return;
}
panel = &drrs->dp->attached_connector->panel;
seq_printf(m, "\t\tBusy_frontbuffer_bits: 0x%X",
drrs->busy_frontbuffer_bits);
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);
mutex_unlock(&drrs->mutex);
return;
}
seq_printf(m, "\t\tVrefresh: %d", vrefresh);
seq_puts(m, "\n\t\t");
mutex_unlock(&drrs->mutex);
} 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) {
drm_modeset_lock(&intel_crtc->base.mutex, NULL);
if (intel_crtc->active) {
active_crtc_cnt++;
seq_printf(m, "\nCRTC %d: ", active_crtc_cnt);
drrs_status_per_crtc(m, dev, intel_crtc);
}
drm_modeset_unlock(&intel_crtc->base.mutex);
}
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;
@ -4548,6 +4657,7 @@ static const struct drm_info_list i915_debugfs_list[] = {
{"i915_wa_registers", i915_wa_registers, 0},
{"i915_ddb_info", i915_ddb_info, 0},
{"i915_sseu_status", i915_sseu_status, 0},
{"i915_drrs_status", i915_drrs_status, 0},
};
#define I915_DEBUGFS_ENTRIES ARRAY_SIZE(i915_debugfs_list)