drm/i915/psr: Avoid any PSR stuff on platforms without support.

We really don't want to setup vfuncs and lock mutexes on
platforms that has no support to PSR.

Also we know what platforms they are so let's do it quietly.

Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Cc: Vathsala Nagaraju <vathsala.nagaraju@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170907230041.22978-2-rodrigo.vivi@intel.com

diff --git a/drivers/gpu/drm/i915/intel_psr.c b/drivers/gpu/drm/i915/intel_psr.c
index f62ab05d3d629ef3eeb37c18fa39c5a3eb1ca33e..60a1ece6d4c9556a468eac86137fde853a483c3f 100644 (file)
--- a/drivers/gpu/drm/i915/intel_psr.c
+++ b/drivers/gpu/drm/i915/intel_psr.c
@@ -496,10 +496,8 @@ void intel_psr_enable(struct intel_dp *intel_dp,
        enum transcoder cpu_transcoder = crtc_state->cpu_transcoder;
        u32 chicken;
 
-       if (!HAS_PSR(dev_priv)) {
-               DRM_DEBUG_KMS("PSR not supported on this platform\n");
+       if (!HAS_PSR(dev_priv))
                return;
-       }
 
        if (!is_edp_psr(intel_dp)) {
                DRM_DEBUG_KMS("PSR not supported by this panel\n");
@@ -678,6 +676,9 @@ void intel_psr_disable(struct intel_dp *intel_dp,
        struct drm_device *dev = intel_dig_port->base.base.dev;
        struct drm_i915_private *dev_priv = to_i915(dev);
 
+       if (!HAS_PSR(dev_priv))
+               return;
+
        mutex_lock(&dev_priv->psr.lock);
        if (!dev_priv->psr.enabled) {
                mutex_unlock(&dev_priv->psr.lock);
@@ -829,6 +830,9 @@ void intel_psr_single_frame_update(struct drm_i915_private *dev_priv,
        enum pipe pipe;
        u32 val;
 
+       if (!HAS_PSR(dev_priv))
+               return;
+
        /*
         * Single frame update is already supported on BDW+ but it requires
         * many W/A and it isn't really needed.
@@ -875,6 +879,9 @@ void intel_psr_invalidate(struct drm_i915_private *dev_priv,
        struct drm_crtc *crtc;
        enum pipe pipe;
 
+       if (!HAS_PSR(dev_priv))
+               return;
+
        mutex_lock(&dev_priv->psr.lock);
        if (!dev_priv->psr.enabled) {
                mutex_unlock(&dev_priv->psr.lock);
@@ -912,6 +919,9 @@ void intel_psr_flush(struct drm_i915_private *dev_priv,
        struct drm_crtc *crtc;
        enum pipe pipe;
 
+       if (!HAS_PSR(dev_priv))
+               return;
+
        mutex_lock(&dev_priv->psr.lock);
        if (!dev_priv->psr.enabled) {
                mutex_unlock(&dev_priv->psr.lock);
@@ -944,6 +954,9 @@ void intel_psr_flush(struct drm_i915_private *dev_priv,
  */
 void intel_psr_init(struct drm_i915_private *dev_priv)
 {
+       if (!HAS_PSR(dev_priv))
+               return;
+
        dev_priv->psr_mmio_base = IS_HASWELL(dev_priv) ?
                HSW_EDP_PSR_BASE : BDW_EDP_PSR_BASE;