diff mbox

drm/i915: Enable/disable DRRS

Message ID 1421920060-32481-1-git-send-email-ramalingam.c@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ramalingam C Jan. 22, 2015, 9:47 a.m. UTC
From: Vandana Kannan <vandana.kannan@intel.com>

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.

V2: [By Ram]: WARN_ON is used when intel_edp_drrs_enable() is called more than
once [Rodrigo]

Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
---
 drivers/gpu/drm/i915/intel_ddi.c |    2 ++
 drivers/gpu/drm/i915/intel_dp.c  |   55 ++++++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_drv.h |    2 ++
 3 files changed, 59 insertions(+)

Comments

Rodrigo Vivi Jan. 23, 2015, 11:25 p.m. UTC | #1
re Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

On Thu, Jan 22, 2015 at 1:47 AM, Ramalingam C <ramalingam.c@intel.com> wrote:
> From: Vandana Kannan <vandana.kannan@intel.com>
>
> 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.
>
> V2: [By Ram]: WARN_ON is used when intel_edp_drrs_enable() is called more than
> once [Rodrigo]
>
> Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_ddi.c |    2 ++
>  drivers/gpu/drm/i915/intel_dp.c  |   55 ++++++++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_drv.h |    2 ++
>  3 files changed, 59 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index f10ec26..ad8b73d 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1610,6 +1610,7 @@ 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) {
> @@ -1635,6 +1636,7 @@ 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 c066560..f843fe0 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -4820,6 +4820,61 @@ 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 (WARN_ON(dev_priv->drrs.dp)) {
> +               DRM_ERROR("DRRS already enabled\n");
> +               goto unlock;
> +       }
> +
> +       dev_priv->drrs.busy_frontbuffer_bits = 0;
> +
> +       dev_priv->drrs.dp = intel_dp;
> +
> +unlock:
> +       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_downclock_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 e957d4d..5a14725 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1030,6 +1030,8 @@ int intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
>                        uint32_t src_w, uint32_t src_h);
>  int intel_disable_plane(struct drm_plane *plane);
>  void intel_plane_destroy(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);
> --
> 1.7.9.5
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Daniel Vetter Jan. 26, 2015, 7:31 a.m. UTC | #2
On Thu, Jan 22, 2015 at 03:17:40PM +0530, Ramalingam C wrote:
> From: Vandana Kannan <vandana.kannan@intel.com>
> 
> 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.
> 
> V2: [By Ram]: WARN_ON is used when intel_edp_drrs_enable() is called more than
> once [Rodrigo]
> 
> Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Please be a bit more careful with adding sob lines - afaik Rodrigo did not
handle this patch. If you just want to get people's attention, please use
Cc: instead.

Fixed while applying.
-Daniel

> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
> ---
>  drivers/gpu/drm/i915/intel_ddi.c |    2 ++
>  drivers/gpu/drm/i915/intel_dp.c  |   55 ++++++++++++++++++++++++++++++++++++++
>  drivers/gpu/drm/i915/intel_drv.h |    2 ++
>  3 files changed, 59 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
> index f10ec26..ad8b73d 100644
> --- a/drivers/gpu/drm/i915/intel_ddi.c
> +++ b/drivers/gpu/drm/i915/intel_ddi.c
> @@ -1610,6 +1610,7 @@ 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) {
> @@ -1635,6 +1636,7 @@ 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 c066560..f843fe0 100644
> --- a/drivers/gpu/drm/i915/intel_dp.c
> +++ b/drivers/gpu/drm/i915/intel_dp.c
> @@ -4820,6 +4820,61 @@ 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 (WARN_ON(dev_priv->drrs.dp)) {
> +		DRM_ERROR("DRRS already enabled\n");
> +		goto unlock;
> +	}
> +
> +	dev_priv->drrs.busy_frontbuffer_bits = 0;
> +
> +	dev_priv->drrs.dp = intel_dp;
> +
> +unlock:
> +	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_downclock_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 e957d4d..5a14725 100644
> --- a/drivers/gpu/drm/i915/intel_drv.h
> +++ b/drivers/gpu/drm/i915/intel_drv.h
> @@ -1030,6 +1030,8 @@ int intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
>  		       uint32_t src_w, uint32_t src_h);
>  int intel_disable_plane(struct drm_plane *plane);
>  void intel_plane_destroy(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);
> -- 
> 1.7.9.5
> 
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
Rodrigo Vivi Jan. 26, 2015, 7 p.m. UTC | #3
On Sun, Jan 25, 2015 at 11:31 PM, Daniel Vetter <daniel@ffwll.ch> wrote:
> On Thu, Jan 22, 2015 at 03:17:40PM +0530, Ramalingam C wrote:
>> From: Vandana Kannan <vandana.kannan@intel.com>
>>
>> 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.
>>
>> V2: [By Ram]: WARN_ON is used when intel_edp_drrs_enable() is called more than
>> once [Rodrigo]
>>
>> Signed-off-by: Vandana Kannan <vandana.kannan@intel.com>
>> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
>
> Please be a bit more careful with adding sob lines - afaik Rodrigo did not
> handle this patch. If you just want to get people's attention, please use
> Cc: instead.
>
> Fixed while applying.
> -Daniel

that was actually my fault... I had fixed a rebase conflicted and
added to a drrs-review branch at cgit.
I signed-off but didn't increment the v2 explaining the rebase.

Thanks for merging.

>
>> Signed-off-by: Ramalingam C <ramalingam.c@intel.com>
>> ---
>>  drivers/gpu/drm/i915/intel_ddi.c |    2 ++
>>  drivers/gpu/drm/i915/intel_dp.c  |   55 ++++++++++++++++++++++++++++++++++++++
>>  drivers/gpu/drm/i915/intel_drv.h |    2 ++
>>  3 files changed, 59 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
>> index f10ec26..ad8b73d 100644
>> --- a/drivers/gpu/drm/i915/intel_ddi.c
>> +++ b/drivers/gpu/drm/i915/intel_ddi.c
>> @@ -1610,6 +1610,7 @@ 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) {
>> @@ -1635,6 +1636,7 @@ 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 c066560..f843fe0 100644
>> --- a/drivers/gpu/drm/i915/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/intel_dp.c
>> @@ -4820,6 +4820,61 @@ 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 (WARN_ON(dev_priv->drrs.dp)) {
>> +             DRM_ERROR("DRRS already enabled\n");
>> +             goto unlock;
>> +     }
>> +
>> +     dev_priv->drrs.busy_frontbuffer_bits = 0;
>> +
>> +     dev_priv->drrs.dp = intel_dp;
>> +
>> +unlock:
>> +     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_downclock_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 e957d4d..5a14725 100644
>> --- a/drivers/gpu/drm/i915/intel_drv.h
>> +++ b/drivers/gpu/drm/i915/intel_drv.h
>> @@ -1030,6 +1030,8 @@ int intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
>>                      uint32_t src_w, uint32_t src_h);
>>  int intel_disable_plane(struct drm_plane *plane);
>>  void intel_plane_destroy(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);
>> --
>> 1.7.9.5
>>
>> _______________________________________________
>> Intel-gfx mailing list
>> Intel-gfx@lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
>
> --
> Daniel Vetter
> Software Engineer, Intel Corporation
> +41 (0) 79 365 57 48 - http://blog.ffwll.ch
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx
diff mbox

Patch

diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c
index f10ec26..ad8b73d 100644
--- a/drivers/gpu/drm/i915/intel_ddi.c
+++ b/drivers/gpu/drm/i915/intel_ddi.c
@@ -1610,6 +1610,7 @@  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) {
@@ -1635,6 +1636,7 @@  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 c066560..f843fe0 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -4820,6 +4820,61 @@  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 (WARN_ON(dev_priv->drrs.dp)) {
+		DRM_ERROR("DRRS already enabled\n");
+		goto unlock;
+	}
+
+	dev_priv->drrs.busy_frontbuffer_bits = 0;
+
+	dev_priv->drrs.dp = intel_dp;
+
+unlock:
+	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_downclock_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 e957d4d..5a14725 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1030,6 +1030,8 @@  int intel_update_plane(struct drm_plane *plane, struct drm_crtc *crtc,
 		       uint32_t src_w, uint32_t src_h);
 int intel_disable_plane(struct drm_plane *plane);
 void intel_plane_destroy(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);