[drm-intel:for-linux-next 14/16] htmldocs: drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'dev_priv'

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tree:   git://anongit.freedesktop.org/drm-intel for-linux-next
head:   62e0fb880123c98793e5c3ba8355501b0305e92e
commit: 85cb48a1651ee7cbc49468776d3078418f7827c5 [14/16] drm/i915: Convert intel_dp to use atomic state
reproduce: make htmldocs

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/drm_modes.c:693: warning: No description found for parameter 'bus_flags'
   drivers/gpu/drm/drm_plane_helper.c:248: warning: No description found for parameter 'dst'
   drivers/gpu/drm/drm_plane_helper.c:248: warning: Excess function parameter 'dest' description in 'drm_plane_helper_check_update'
   drivers/gpu/drm/drm_plane_helper.c:247: warning: No description found for parameter 'dst'
   drivers/gpu/drm/drm_plane_helper.c:247: warning: Excess function parameter 'dest' description in 'drm_plane_helper_check_update'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'dev_priv'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: Excess function parameter 'dev' description in 'intel_dp_set_drrs_state'
   drivers/gpu/drm/i915/intel_dp.c:5158: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5188: warning: No description found for parameter 'old_crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'dev_priv'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: Excess function parameter 'dev' description in 'intel_dp_set_drrs_state'
   drivers/gpu/drm/i915/intel_dp.c:5158: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5188: warning: No description found for parameter 'old_crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'dev_priv'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: Excess function parameter 'dev' description in 'intel_dp_set_drrs_state'
   drivers/gpu/drm/i915/intel_dp.c:5158: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5188: warning: No description found for parameter 'old_crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'dev_priv'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: Excess function parameter 'dev' description in 'intel_dp_set_drrs_state'
   drivers/gpu/drm/i915/intel_dp.c:5158: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5188: warning: No description found for parameter 'old_crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'dev_priv'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5063: warning: Excess function parameter 'dev' description in 'intel_dp_set_drrs_state'
   drivers/gpu/drm/i915/intel_dp.c:5158: warning: No description found for parameter 'crtc_state'
>> drivers/gpu/drm/i915/intel_dp.c:5188: warning: No description found for parameter 'old_crtc_state'

vim +/dev_priv +5063 drivers/gpu/drm/i915/intel_dp.c

b33a2815 Vandana Kannan              2015-02-13  5057   *
b33a2815 Vandana Kannan              2015-02-13  5058   * The caller of this function needs to take a lock on dev_priv->drrs.
b33a2815 Vandana Kannan              2015-02-13  5059   */
85cb48a1 Maarten Lankhorst           2016-08-09  5060  static void intel_dp_set_drrs_state(struct drm_i915_private *dev_priv,
85cb48a1 Maarten Lankhorst           2016-08-09  5061  				    struct intel_crtc_state *crtc_state,
85cb48a1 Maarten Lankhorst           2016-08-09  5062  				    int refresh_rate)
439d7ac0 Pradeep Bhat                2014-04-05 @5063  {
439d7ac0 Pradeep Bhat                2014-04-05  5064  	struct intel_encoder *encoder;
96178eeb Vandana Kannan              2015-01-10  5065  	struct intel_digital_port *dig_port = NULL;
96178eeb Vandana Kannan              2015-01-10  5066  	struct intel_dp *intel_dp = dev_priv->drrs.dp;
85cb48a1 Maarten Lankhorst           2016-08-09  5067  	struct intel_crtc *intel_crtc = to_intel_crtc(crtc_state->base.crtc);
96178eeb Vandana Kannan              2015-01-10  5068  	enum drrs_refresh_rate_type index = DRRS_HIGH_RR;
439d7ac0 Pradeep Bhat                2014-04-05  5069  
439d7ac0 Pradeep Bhat                2014-04-05  5070  	if (refresh_rate <= 0) {
439d7ac0 Pradeep Bhat                2014-04-05  5071  		DRM_DEBUG_KMS("Refresh rate should be positive non-zero.\n");
439d7ac0 Pradeep Bhat                2014-04-05  5072  		return;
439d7ac0 Pradeep Bhat                2014-04-05  5073  	}
439d7ac0 Pradeep Bhat                2014-04-05  5074  
96178eeb Vandana Kannan              2015-01-10  5075  	if (intel_dp == NULL) {
96178eeb Vandana Kannan              2015-01-10  5076  		DRM_DEBUG_KMS("DRRS not supported.\n");
439d7ac0 Pradeep Bhat                2014-04-05  5077  		return;
439d7ac0 Pradeep Bhat                2014-04-05  5078  	}
439d7ac0 Pradeep Bhat                2014-04-05  5079  
1fcc9d1c Daniel Vetter               2014-07-11  5080  	/*
e4d59f6b Rodrigo Vivi                2014-11-20  5081  	 * FIXME: This needs proper synchronization with psr state for some
e4d59f6b Rodrigo Vivi                2014-11-20  5082  	 * platforms that cannot have PSR and DRRS enabled at the same time.
1fcc9d1c Daniel Vetter               2014-07-11  5083  	 */
439d7ac0 Pradeep Bhat                2014-04-05  5084  
96178eeb Vandana Kannan              2015-01-10  5085  	dig_port = dp_to_dig_port(intel_dp);
96178eeb Vandana Kannan              2015-01-10  5086  	encoder = &dig_port->base;
723f9aab Ander Conselvan de Oliveira 2015-03-20  5087  	intel_crtc = to_intel_crtc(encoder->base.crtc);
439d7ac0 Pradeep Bhat                2014-04-05  5088  
439d7ac0 Pradeep Bhat                2014-04-05  5089  	if (!intel_crtc) {
439d7ac0 Pradeep Bhat                2014-04-05  5090  		DRM_DEBUG_KMS("DRRS: intel_crtc not initialized\n");
439d7ac0 Pradeep Bhat                2014-04-05  5091  		return;
439d7ac0 Pradeep Bhat                2014-04-05  5092  	}
439d7ac0 Pradeep Bhat                2014-04-05  5093  
96178eeb Vandana Kannan              2015-01-10  5094  	if (dev_priv->drrs.type < SEAMLESS_DRRS_SUPPORT) {
439d7ac0 Pradeep Bhat                2014-04-05  5095  		DRM_DEBUG_KMS("Only Seamless DRRS supported.\n");
439d7ac0 Pradeep Bhat                2014-04-05  5096  		return;
439d7ac0 Pradeep Bhat                2014-04-05  5097  	}
439d7ac0 Pradeep Bhat                2014-04-05  5098  
96178eeb Vandana Kannan              2015-01-10  5099  	if (intel_dp->attached_connector->panel.downclock_mode->vrefresh ==
96178eeb Vandana Kannan              2015-01-10  5100  			refresh_rate)
439d7ac0 Pradeep Bhat                2014-04-05  5101  		index = DRRS_LOW_RR;
439d7ac0 Pradeep Bhat                2014-04-05  5102  
96178eeb Vandana Kannan              2015-01-10  5103  	if (index == dev_priv->drrs.refresh_rate_type) {
439d7ac0 Pradeep Bhat                2014-04-05  5104  		DRM_DEBUG_KMS(
439d7ac0 Pradeep Bhat                2014-04-05  5105  			"DRRS requested for previously set RR...ignoring\n");
439d7ac0 Pradeep Bhat                2014-04-05  5106  		return;
439d7ac0 Pradeep Bhat                2014-04-05  5107  	}
439d7ac0 Pradeep Bhat                2014-04-05  5108  
85cb48a1 Maarten Lankhorst           2016-08-09  5109  	if (!crtc_state->base.active) {
439d7ac0 Pradeep Bhat                2014-04-05  5110  		DRM_DEBUG_KMS("eDP encoder disabled. CRTC not Active\n");
439d7ac0 Pradeep Bhat                2014-04-05  5111  		return;
439d7ac0 Pradeep Bhat                2014-04-05  5112  	}
439d7ac0 Pradeep Bhat                2014-04-05  5113  
85cb48a1 Maarten Lankhorst           2016-08-09  5114  	if (INTEL_GEN(dev_priv) >= 8 && !IS_CHERRYVIEW(dev_priv)) {
a4c30b1d Vandana Kannan              2015-02-13  5115  		switch (index) {
a4c30b1d Vandana Kannan              2015-02-13  5116  		case DRRS_HIGH_RR:
a4c30b1d Vandana Kannan              2015-02-13  5117  			intel_dp_set_m_n(intel_crtc, M1_N1);
a4c30b1d Vandana Kannan              2015-02-13  5118  			break;
a4c30b1d Vandana Kannan              2015-02-13  5119  		case DRRS_LOW_RR:
a4c30b1d Vandana Kannan              2015-02-13  5120  			intel_dp_set_m_n(intel_crtc, M2_N2);
a4c30b1d Vandana Kannan              2015-02-13  5121  			break;
a4c30b1d Vandana Kannan              2015-02-13  5122  		case DRRS_MAX_RR:
a4c30b1d Vandana Kannan              2015-02-13  5123  		default:
a4c30b1d Vandana Kannan              2015-02-13  5124  			DRM_ERROR("Unsupported refreshrate type\n");
a4c30b1d Vandana Kannan              2015-02-13  5125  		}
85cb48a1 Maarten Lankhorst           2016-08-09  5126  	} else if (INTEL_GEN(dev_priv) > 6) {
85cb48a1 Maarten Lankhorst           2016-08-09  5127  		i915_reg_t reg = PIPECONF(crtc_state->cpu_transcoder);
649636ef Ville Syrjälä               2015-09-22  5128  		u32 val;
a4c30b1d Vandana Kannan              2015-02-13  5129  
649636ef Ville Syrjälä               2015-09-22  5130  		val = I915_READ(reg);
439d7ac0 Pradeep Bhat                2014-04-05  5131  		if (index > DRRS_HIGH_RR) {
85cb48a1 Maarten Lankhorst           2016-08-09  5132  			if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
6fa7aec1 Vandana Kannan              2015-02-13  5133  				val |= PIPECONF_EDP_RR_MODE_SWITCH_VLV;
6fa7aec1 Vandana Kannan              2015-02-13  5134  			else
439d7ac0 Pradeep Bhat                2014-04-05  5135  				val |= PIPECONF_EDP_RR_MODE_SWITCH;
439d7ac0 Pradeep Bhat                2014-04-05  5136  		} else {
85cb48a1 Maarten Lankhorst           2016-08-09  5137  			if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv))
6fa7aec1 Vandana Kannan              2015-02-13  5138  				val &= ~PIPECONF_EDP_RR_MODE_SWITCH_VLV;
6fa7aec1 Vandana Kannan              2015-02-13  5139  			else
439d7ac0 Pradeep Bhat                2014-04-05  5140  				val &= ~PIPECONF_EDP_RR_MODE_SWITCH;
439d7ac0 Pradeep Bhat                2014-04-05  5141  		}
439d7ac0 Pradeep Bhat                2014-04-05  5142  		I915_WRITE(reg, val);
439d7ac0 Pradeep Bhat                2014-04-05  5143  	}
439d7ac0 Pradeep Bhat                2014-04-05  5144  
4e9ac947 Vandana Kannan              2015-01-22  5145  	dev_priv->drrs.refresh_rate_type = index;
4e9ac947 Vandana Kannan              2015-01-22  5146  
4e9ac947 Vandana Kannan              2015-01-22  5147  	DRM_DEBUG_KMS("eDP Refresh Rate set to : %dHz\n", refresh_rate);
4e9ac947 Vandana Kannan              2015-01-22  5148  }
4e9ac947 Vandana Kannan              2015-01-22  5149  
b33a2815 Vandana Kannan              2015-02-13  5150  /**
b33a2815 Vandana Kannan              2015-02-13  5151   * intel_edp_drrs_enable - init drrs struct if supported
b33a2815 Vandana Kannan              2015-02-13  5152   * @intel_dp: DP struct
b33a2815 Vandana Kannan              2015-02-13  5153   *
b33a2815 Vandana Kannan              2015-02-13  5154   * Initializes frontbuffer_bits and drrs.dp
b33a2815 Vandana Kannan              2015-02-13  5155   */
85cb48a1 Maarten Lankhorst           2016-08-09  5156  void intel_edp_drrs_enable(struct intel_dp *intel_dp,
85cb48a1 Maarten Lankhorst           2016-08-09  5157  			   struct intel_crtc_state *crtc_state)
c395578e Vandana Kannan              2015-01-22  5158  {
c395578e Vandana Kannan              2015-01-22  5159  	struct drm_device *dev = intel_dp_to_dev(intel_dp);
fac5e23e Chris Wilson                2016-07-04  5160  	struct drm_i915_private *dev_priv = to_i915(dev);
c395578e Vandana Kannan              2015-01-22  5161  
85cb48a1 Maarten Lankhorst           2016-08-09  5162  	if (!crtc_state->has_drrs) {
c395578e Vandana Kannan              2015-01-22  5163  		DRM_DEBUG_KMS("Panel doesn't support DRRS\n");
c395578e Vandana Kannan              2015-01-22  5164  		return;
c395578e Vandana Kannan              2015-01-22  5165  	}
c395578e Vandana Kannan              2015-01-22  5166  
c395578e Vandana Kannan              2015-01-22  5167  	mutex_lock(&dev_priv->drrs.mutex);
c395578e Vandana Kannan              2015-01-22  5168  	if (WARN_ON(dev_priv->drrs.dp)) {
c395578e Vandana Kannan              2015-01-22  5169  		DRM_ERROR("DRRS already enabled\n");
c395578e Vandana Kannan              2015-01-22  5170  		goto unlock;
c395578e Vandana Kannan              2015-01-22  5171  	}
c395578e Vandana Kannan              2015-01-22  5172  
c395578e Vandana Kannan              2015-01-22  5173  	dev_priv->drrs.busy_frontbuffer_bits = 0;
c395578e Vandana Kannan              2015-01-22  5174  
c395578e Vandana Kannan              2015-01-22  5175  	dev_priv->drrs.dp = intel_dp;
c395578e Vandana Kannan              2015-01-22  5176  
c395578e Vandana Kannan              2015-01-22  5177  unlock:
c395578e Vandana Kannan              2015-01-22  5178  	mutex_unlock(&dev_priv->drrs.mutex);
c395578e Vandana Kannan              2015-01-22  5179  }
c395578e Vandana Kannan              2015-01-22  5180  
b33a2815 Vandana Kannan              2015-02-13  5181  /**
b33a2815 Vandana Kannan              2015-02-13  5182   * intel_edp_drrs_disable - Disable DRRS
b33a2815 Vandana Kannan              2015-02-13  5183   * @intel_dp: DP struct
b33a2815 Vandana Kannan              2015-02-13  5184   *
b33a2815 Vandana Kannan              2015-02-13  5185   */
85cb48a1 Maarten Lankhorst           2016-08-09  5186  void intel_edp_drrs_disable(struct intel_dp *intel_dp,
85cb48a1 Maarten Lankhorst           2016-08-09  5187  			    struct intel_crtc_state *old_crtc_state)
c395578e Vandana Kannan              2015-01-22 @5188  {
c395578e Vandana Kannan              2015-01-22  5189  	struct drm_device *dev = intel_dp_to_dev(intel_dp);
fac5e23e Chris Wilson                2016-07-04  5190  	struct drm_i915_private *dev_priv = to_i915(dev);
c395578e Vandana Kannan              2015-01-22  5191  

:::::: The code at line 5063 was first introduced by commit
:::::: 439d7ac0879f9fd4c56f212e03477f358133c56c drm/i915: Add support for DRRS to switch RR

:::::: TO: Pradeep Bhat <pradeep.bhat@xxxxxxxxx>
:::::: CC: Daniel Vetter <daniel.vetter@xxxxxxxx>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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