[PATCH 3/7] drm/i915: Enable/disable DRRS

Vandana Kannan
2014-12-18T15:15:32Z

Calling enable/disable DRRS when enable/disable DDI are called.
These functions are responsible for setup of drrs data (in enable) and
reset of drrs (in disable).
has_drrs is true when downclock_mode is found and SEAMLESS_DRRS is set in
the VBT. A check has been added for has_drrs in these functions, to make
sure the functions go through only if DRRS will work on the platform with
the attached panel.

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
---
drivers/gpu/drm/i915/intel_ddi.c | 2 ++
drivers/gpu/drm/i915/intel_dp.c | 54 ++++++++++++++++++++++++++++++++++++++++
drivers/gpu/drm/i915/intel_drv.h | 2 ++
3 files changed, 58 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index 4e2e860..9a3ba72 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1600,6 +1600,7 @@ static void intel_enable_ddi(struct intel_encoder *intel_encoder)

intel_edp_backlight_on(intel_dp);
intel_psr_enable(intel_dp);
+ intel_edp_drrs_enable(intel_dp);
}

if (intel_crtc->config.has_audio) {
@@ -1625,6 +1626,7 @@ static void intel_disable_ddi(struct intel_encoder *intel_encoder)
if (type == INTEL_OUTPUT_EDP) {
struct intel_dp *intel_dp = enc_to_intel_dp(encoder);

+ intel_edp_drrs_disable(intel_dp);
intel_psr_disable(intel_dp);
intel_edp_backlight_off(intel_dp);
}
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index ef8b55d..7098470 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4819,6 +4819,60 @@ static void intel_dp_set_drrs_state(struct drm_device *dev, int refresh_rate)
DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate);
}

+void intel_edp_drrs_enable(struct intel_dp *intel_dp)
+{
+ struct drm_device *dev = intel_dp_to_dev(intel_dp);
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+ struct drm_crtc *crtc = dig_port->base.base.crtc;
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+ if (!intel_crtc->config.has_drrs) {
+ DRM_DEBUG_KMS("Panel doesn't support DRRS\n");
+ return;
+ }
+
+ mutex_lock(&dev_priv->drrs.mutex);
+ if (dev_priv->drrs.dp) {
+ DRM_DEBUG_KMS("DRRS already enabled\n");
+ mutex_unlock(&dev_priv->drrs.mutex);
+ return;
+ }
+
+ dev_priv->drrs.busy_frontbuffer_bits = 0;
+
+ dev_priv->drrs.dp = intel_dp;
+ mutex_unlock(&dev_priv->drrs.mutex);
+}
+
+void intel_edp_drrs_disable(struct intel_dp *intel_dp)
+{
+ struct drm_device *dev = intel_dp_to_dev(intel_dp);
+ struct drm_i915_private *dev_priv = dev->dev_private;
+ struct intel_digital_port *dig_port = dp_to_dig_port(intel_dp);
+ struct drm_crtc *crtc = dig_port->base.base.crtc;
+ struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+
+ if (!intel_crtc->config.has_drrs)
+ return;
+
+ mutex_lock(&dev_priv->drrs.mutex);
+ if (!dev_priv->drrs.dp) {
+ mutex_unlock(&dev_priv->drrs.mutex);
+ return;
+ }
+
+ if (dev_priv->drrs.refresh_rate_type == DRRS_LOW_RR)
+ intel_dp_set_drrs_state(dev_priv->dev,
+ intel_dp->attached_connector->panel.
+ fixed_mode->vrefresh);
+
+ dev_priv->drrs.dp = NULL;
+ mutex_unlock(&dev_priv->drrs.mutex);
+
+ cancel_delayed_work_sync(&dev_priv->drrs.work);
+}
+
static void intel_edp_drrs_work(struct work_struct *work)
{
struct drm_i915_private *dev_priv =
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a972c52..ae02413 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1002,6 +1002,8 @@ int intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
uint32_t src_x, uint32_t src_y,
uint32_t src_w, uint32_t src_h);
int intel_disable_plane(struct drm_plane *plane);
+void intel_edp_drrs_enable(struct intel_dp *intel_dp);
+void intel_edp_drrs_disable(struct intel_dp *intel_dp);

/* intel_dp_mst.c */
int intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_id);