openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

drm/i915/psr: Timestamps for PSR entry and exit interrupts. 

Timestamps are useful for IGT tests that trigger PSR exit and/or wait for
PSR entry.

v2: Removed seqlock (Ville)
    Removed erroneous warning in irq loop (Chris)

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Jose Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180403212420.25007-4-dhinakaran.pandiyan@intel.com
This commit is contained in:
Dhinakaran Pandiyan 2018-04-03 14:24:20 -07:00 committed by Rodrigo Vivi
parent 54fd314959
commit 3f983e54fd
3 changed files with 16 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -2686,6 +2686,13 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
}
mutex_unlock(&dev_priv->psr.lock);
if (READ_ONCE(dev_priv->psr.debug)) {
seq_printf(m, "Last attempted entry at: %lld\n",
dev_priv->psr.last_entry_attempt);
seq_printf(m, "Last exit at: %lld\n",
dev_priv->psr.last_exit);
}
intel_runtime_pm_put(dev_priv);
return 0;
}

2
drivers/gpu/drm/i915/i915_drv.h
View File

@ -611,6 +611,8 @@ struct i915_psr {
bool psr2_enabled;
u8 sink_sync_latency;
bool debug;
ktime_t last_entry_attempt;
ktime_t last_exit;
void (*enable_source)(struct intel_dp *,
const struct intel_crtc_state *);

9
drivers/gpu/drm/i915/intel_psr.c
View File

@ -129,6 +129,7 @@ void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir)
{
u32 transcoders = BIT(TRANSCODER_EDP);
enum transcoder cpu_transcoder;
ktime_t time_ns = ktime_get();
if (INTEL_GEN(dev_priv) >= 8)
transcoders |= BIT(TRANSCODER_A) |
@ -141,13 +142,17 @@ void intel_psr_irq_handler(struct drm_i915_private *dev_priv, u32 psr_iir)
DRM_DEBUG_KMS("[transcoder %s] PSR aux error\n",
transcoder_name(cpu_transcoder));
if (psr_iir & EDP_PSR_PRE_ENTRY(cpu_transcoder))
if (psr_iir & EDP_PSR_PRE_ENTRY(cpu_transcoder)) {
dev_priv->psr.last_entry_attempt = time_ns;
DRM_DEBUG_KMS("[transcoder %s] PSR entry attempt in 2 vblanks\n",
transcoder_name(cpu_transcoder));
}
if (psr_iir & EDP_PSR_POST_EXIT(cpu_transcoder))
if (psr_iir & EDP_PSR_POST_EXIT(cpu_transcoder)) {
dev_priv->psr.last_exit = time_ns;
DRM_DEBUG_KMS("[transcoder %s] PSR exit completed\n",
transcoder_name(cpu_transcoder));
}
}
}