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drm/i915/psr: Avoid initializing PSR if there is no sink support. 

DPCD read for the eDP is complete by the time intel_psr_init() is
called, which means we can avoid initializing PSR structures and state
if there is no sink support.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180103213824.1405-3-dhinakaran.pandiyan@intel.com
This commit is contained in:
Dhinakaran Pandiyan 2018-01-03 13:38:24 -08:00 committed by Rodrigo Vivi
parent 4371d89601
commit c9ef291a7e
2 changed files with 15 additions and 1 deletions
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7
drivers/gpu/drm/i915/i915_debugfs.c
View File

@ -2521,14 +2521,19 @@ static int i915_edp_psr_status(struct seq_file *m, void *data)
u32 stat[3];
enum pipe pipe;
bool enabled = false;
bool sink_support;
if (!HAS_PSR(dev_priv))
return -ENODEV;
sink_support = dev_priv->psr.sink_support;
seq_printf(m, "Sink_Support: %s\n", yesno(sink_support));
if (!sink_support)
return 0;
intel_runtime_pm_get(dev_priv);
mutex_lock(&dev_priv->psr.lock);
seq_printf(m, "Sink_Support: %s\n", yesno(dev_priv->psr.sink_support));
seq_printf(m, "Enabled: %s\n", yesno((bool)dev_priv->psr.enabled));
seq_printf(m, "Active: %s\n", yesno(dev_priv->psr.active));
seq_printf(m, "Busy frontbuffer bits: 0x%03x\n",

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

@ -503,6 +503,9 @@ void intel_psr_enable(struct intel_dp *intel_dp,
if (!crtc_state->has_psr)
return;
if (WARN_ON(!CAN_PSR(dev_priv)))
return;
WARN_ON(dev_priv->drrs.dp);
mutex_lock(&dev_priv->psr.lock);
if (dev_priv->psr.enabled) {
@ -633,6 +636,9 @@ void intel_psr_disable(struct intel_dp *intel_dp,
if (!old_crtc_state->has_psr)
return;
if (WARN_ON(!CAN_PSR(dev_priv)))
return;
mutex_lock(&dev_priv->psr.lock);
if (!dev_priv->psr.enabled) {
mutex_unlock(&dev_priv->psr.lock);
@ -913,6 +919,9 @@ void intel_psr_init(struct drm_i915_private *dev_priv)
dev_priv->psr_mmio_base = IS_HASWELL(dev_priv) ?
HSW_EDP_PSR_BASE : BDW_EDP_PSR_BASE;
if (!dev_priv->psr.sink_support)
return;
/* Per platform default: all disabled. */
if (i915_modparams.enable_psr == -1)
i915_modparams.enable_psr = 0;