drm/i915/display/dp: Prefer drm_WARN* over WARN*

struct drm_device specific drm_WARN* macros include device information
in the backtrace, so we know what device the warnings originate from.

Prefer drm_WARN* over WARN* at places where struct intel_dp or struct
drm_i915_private pointer is available.

Conversion is done with below sementic patch:

@rule1@
identifier func, T;
@@
func(...) {
...
struct drm_i915_private *T = ...;
<+...
(
-WARN_ON(
+drm_WARN_ON(&T->drm,
...)
|
-WARN_ON_ONCE(
+drm_WARN_ON_ONCE(&T->drm,
...)
)
...+>
}

@rule2@
identifier func, T;
@@
func(struct drm_i915_private *T,...) {
<+...
(
-WARN_ON(
+drm_WARN_ON(&T->drm,
...)
|
-WARN_ON_ONCE(
+drm_WARN_ON_ONCE(&T->drm,
...)
)
...+>
}

@rule3@
identifier func, T;
@@
func(struct intel_dp *T,...) {
+ struct drm_i915_private *i915 = dp_to_i915(T);
<+...
(
-WARN_ON(
+drm_WARN_ON(&i915->drm,
...)
|
-WARN_ON_ONCE(
+drm_WARN_ON_ONCE(&i915->drm,
...)
)
...+>

}

@rule4@
identifier func, T;
@@
func(...) {
...
struct intel_dp *T = ...;
+ struct drm_i915_private *i915 = dp_to_i915(T);
<+...
(
-WARN_ON(
+drm_WARN_ON(&i915->drm,
...)
|
-WARN_ON_ONCE(
+drm_WARN_ON_ONCE(&i915->drm,
...)
)
...+>

}

Signed-off-by: Pankaj Bharadiya <pankaj.laxminarayan.bharadiya@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200504181600.18503-3-pankaj.laxminarayan.bharadiya@intel.com

drivers/gpu/drm/i915/display/intel_dp.c

@@ -409,7 +409,10 @@ static int intel_dp_rate_index(const int *rates, int len, int rate)
 
 static void intel_dp_set_common_rates(struct intel_dp *intel_dp)
 {
-	WARN_ON(!intel_dp->num_source_rates || !intel_dp->num_sink_rates);
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
+
+	drm_WARN_ON(&i915->drm,
+		    !intel_dp->num_source_rates || !intel_dp->num_sink_rates);
 
 	intel_dp->num_common_rates = intersect_rates(intel_dp->source_rates,
 						     intel_dp->num_source_rates,
@@ -418,7 +421,7 @@ static void intel_dp_set_common_rates(struct intel_dp *intel_dp)
 						     intel_dp->common_rates);
 
 	/* Paranoia, there should always be something in common. */
-	if (WARN_ON(intel_dp->num_common_rates == 0)) {
+	if (drm_WARN_ON(&i915->drm, intel_dp->num_common_rates == 0)) {
 		intel_dp->common_rates[0] = 162000;
 		intel_dp->num_common_rates = 1;
 	}
@@ -1555,6 +1558,7 @@ static ssize_t
 intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 {
 	struct intel_dp *intel_dp = container_of(aux, struct intel_dp, aux);
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	u8 txbuf[20], rxbuf[20];
 	size_t txsize, rxsize;
 	int ret;
@@ -1568,10 +1572,10 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 		txsize = msg->size ? HEADER_SIZE + msg->size : BARE_ADDRESS_SIZE;
 		rxsize = 2; /* 0 or 1 data bytes */
 
-		if (WARN_ON(txsize > 20))
+		if (drm_WARN_ON(&i915->drm, txsize > 20))
 			return -E2BIG;
 
-		WARN_ON(!msg->buffer != !msg->size);
+		drm_WARN_ON(&i915->drm, !msg->buffer != !msg->size);
 
 		if (msg->buffer)
 			memcpy(txbuf + HEADER_SIZE, msg->buffer, msg->size);
@@ -1596,7 +1600,7 @@ intel_dp_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg)
 		txsize = msg->size ? HEADER_SIZE : BARE_ADDRESS_SIZE;
 		rxsize = msg->size + 1;
 
-		if (WARN_ON(rxsize > 20))
+		if (drm_WARN_ON(&i915->drm, rxsize > 20))
 			return -E2BIG;
 
 		ret = intel_dp_aux_xfer(intel_dp, txbuf, txsize,
@@ -1871,10 +1875,11 @@ static void intel_dp_print_rates(struct intel_dp *intel_dp)
 int
 intel_dp_max_link_rate(struct intel_dp *intel_dp)
 {
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	int len;
 
 	len = intel_dp_common_len_rate_limit(intel_dp, intel_dp->max_link_rate);
-	if (WARN_ON(len <= 0))
+	if (drm_WARN_ON(&i915->drm, len <= 0))
 		return 162000;
 
 	return intel_dp->common_rates[len - 1];
@@ -1882,10 +1887,11 @@ intel_dp_max_link_rate(struct intel_dp *intel_dp)
 
 int intel_dp_rate_select(struct intel_dp *intel_dp, int rate)
 {
+	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
 	int i = intel_dp_rate_index(intel_dp->sink_rates,
 				    intel_dp->num_sink_rates, rate);
 
-	if (WARN_ON(i < 0))
+	if (drm_WARN_ON(&i915->drm, i < 0))
 		i = 0;
 
 	return i;
@@ -5601,7 +5607,7 @@ intel_dp_check_mst_status(struct intel_dp *intel_dp)
 	if (!intel_dp->is_mst)
 		return -EINVAL;
 
-	WARN_ON_ONCE(intel_dp->active_mst_links < 0);
+	drm_WARN_ON_ONCE(&i915->drm, intel_dp->active_mst_links < 0);
 
 	for (;;) {
 		u8 esi[DP_DPRX_ESI_LEN] = {};
@@ -5963,7 +5969,7 @@ intel_dp_detect_dpcd(struct intel_dp *intel_dp)
 	u8 *dpcd = intel_dp->dpcd;
 	u8 type;
 
-	if (WARN_ON(intel_dp_is_edp(intel_dp)))
+	if (drm_WARN_ON(&i915->drm, intel_dp_is_edp(intel_dp)))
 		return connector_status_connected;
 
 	if (lspcon->active)