[Intel-gfx] [PATCH] drm/i915: Enable/disable DRRS

[Rodrigo Vivi]

On Sun, Jan 25, 2015 at 11:31 PM, Daniel Vetter <daniel at ffwll.ch> wrote:
> On Thu, Jan 22, 2015 at 03:17:40PM +0530, Ramalingam C wrote:
>> From: Vandana Kannan <vandana.kannan at 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 at intel.com>
>> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at 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 at 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
>>
>> _______________________________________________
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>> Intel-gfx at 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
> _______________________________________________
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-- 
Rodrigo Vivi
Blog: http://blog.vivi.eng.br