drm/i915/pm: Prefer drm_WARN_ON over WARN_ON

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_ON over WARN_ON.

Conversion is done with below sementic patch:

@@
identifier func, T;
@@
func(...) {
...
struct intel_crtc *T = ...;
+struct drm_i915_private *dev_priv = to_i915(T->base.dev);
<+...
-WARN_ON(
+drm_WARN_ON(&dev_priv->drm,
...)
...+>

}

@@
identifier func, T;
@@
func(struct intel_crtc_state *T,...) {
+struct drm_i915_private *dev_priv = to_i915(T->uapi.crtc->dev);
<+...
-WARN_ON(
+drm_WARN_ON(&dev_priv->drm,
...)
...+>

}

changes since v1:
    - Added dev_priv local variable and used it in drm_WARN_ON calls (Jani)
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/20200504181600.18503-9-pankaj.laxminarayan.bharadiya@intel.com

drivers/gpu/drm/i915/intel_pm.c

@@ -1437,6 +1437,7 @@ static int g4x_compute_pipe_wm(struct intel_crtc_state *crtc_state)
 static int g4x_compute_intermediate_wm(struct intel_crtc_state *new_crtc_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	struct g4x_wm_state *intermediate = &new_crtc_state->wm.g4x.intermediate;
 	const struct g4x_wm_state *optimal = &new_crtc_state->wm.g4x.optimal;
 	struct intel_atomic_state *intel_state =
@@ -1465,7 +1466,7 @@ static int g4x_compute_intermediate_wm(struct intel_crtc_state *new_crtc_state)
 			max(optimal->wm.plane[plane_id],
 			    active->wm.plane[plane_id]);
 
-		WARN_ON(intermediate->wm.plane[plane_id] >
+		drm_WARN_ON(&dev_priv->drm, intermediate->wm.plane[plane_id] >
 			    g4x_plane_fifo_size(plane_id, G4X_WM_LEVEL_NORMAL));
 	}
 
@@ -1483,20 +1484,24 @@ static int g4x_compute_intermediate_wm(struct intel_crtc_state *new_crtc_state)
 	intermediate->hpll.fbc = max(optimal->hpll.fbc,
 				     active->hpll.fbc);
 
-	WARN_ON((intermediate->sr.plane >
+	drm_WARN_ON(&dev_priv->drm,
+		    (intermediate->sr.plane >
 		     g4x_plane_fifo_size(PLANE_PRIMARY, G4X_WM_LEVEL_SR) ||
 		     intermediate->sr.cursor >
 		     g4x_plane_fifo_size(PLANE_CURSOR, G4X_WM_LEVEL_SR)) &&
 		    intermediate->cxsr);
-	WARN_ON((intermediate->sr.plane >
+	drm_WARN_ON(&dev_priv->drm,
+		    (intermediate->sr.plane >
 		     g4x_plane_fifo_size(PLANE_PRIMARY, G4X_WM_LEVEL_HPLL) ||
 		     intermediate->sr.cursor >
 		     g4x_plane_fifo_size(PLANE_CURSOR, G4X_WM_LEVEL_HPLL)) &&
 		    intermediate->hpll_en);
 
-	WARN_ON(intermediate->sr.fbc > g4x_fbc_fifo_size(1) &&
+	drm_WARN_ON(&dev_priv->drm,
+		    intermediate->sr.fbc > g4x_fbc_fifo_size(1) &&
 		    intermediate->fbc_en && intermediate->cxsr);
-	WARN_ON(intermediate->hpll.fbc > g4x_fbc_fifo_size(2) &&
+	drm_WARN_ON(&dev_priv->drm,
+		    intermediate->hpll.fbc > g4x_fbc_fifo_size(2) &&
 		    intermediate->fbc_en && intermediate->hpll_en);
 
 out:
@@ -1681,6 +1686,7 @@ static bool vlv_need_sprite0_fifo_workaround(unsigned int active_planes)
 static int vlv_compute_fifo(struct intel_crtc_state *crtc_state)
 {
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	const struct g4x_pipe_wm *raw =
 		&crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM2];
 	struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state;
@@ -1749,11 +1755,11 @@ static int vlv_compute_fifo(struct intel_crtc_state *crtc_state)
 		fifo_left -= plane_extra;
 	}
 
-	WARN_ON(active_planes != 0 && fifo_left != 0);
+	drm_WARN_ON(&dev_priv->drm, active_planes != 0 && fifo_left != 0);
 
 	/* give it all to the first plane if none are active */
 	if (active_planes == 0) {
-		WARN_ON(fifo_left != fifo_size);
+		drm_WARN_ON(&dev_priv->drm, fifo_left != fifo_size);
 		fifo_state->plane[PLANE_PRIMARY] = fifo_left;
 	}
 
@@ -4333,11 +4339,13 @@ static uint_fixed_16_16_t
 skl_plane_downscale_amount(const struct intel_crtc_state *crtc_state,
 			   const struct intel_plane_state *plane_state)
 {
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
 	u32 src_w, src_h, dst_w, dst_h;
 	uint_fixed_16_16_t fp_w_ratio, fp_h_ratio;
 	uint_fixed_16_16_t downscale_h, downscale_w;
 
-	if (WARN_ON(!intel_wm_plane_visible(crtc_state, plane_state)))
+	if (drm_WARN_ON(&dev_priv->drm,
+			!intel_wm_plane_visible(crtc_state, plane_state)))
 		return u32_to_fixed16(0);
 
 	/*
@@ -5031,6 +5039,7 @@ skl_wm_method2(u32 pixel_rate, u32 pipe_htotal, u32 latency,
 static uint_fixed_16_16_t
 intel_get_linetime_us(const struct intel_crtc_state *crtc_state)
 {
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
 	u32 pixel_rate;
 	u32 crtc_htotal;
 	uint_fixed_16_16_t linetime_us;
@@ -5040,7 +5049,7 @@ intel_get_linetime_us(const struct intel_crtc_state *crtc_state)
 
 	pixel_rate = crtc_state->pixel_rate;
 
-	if (WARN_ON(pixel_rate == 0))
+	if (drm_WARN_ON(&dev_priv->drm, pixel_rate == 0))
 		return u32_to_fixed16(0);
 
 	crtc_htotal = crtc_state->hw.adjusted_mode.crtc_htotal;
@@ -5053,11 +5062,13 @@ static u32
 skl_adjusted_plane_pixel_rate(const struct intel_crtc_state *crtc_state,
 			      const struct intel_plane_state *plane_state)
 {
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
 	u64 adjusted_pixel_rate;
 	uint_fixed_16_16_t downscale_amount;
 
 	/* Shouldn't reach here on disabled planes... */
-	if (WARN_ON(!intel_wm_plane_visible(crtc_state, plane_state)))
+	if (drm_WARN_ON(&dev_priv->drm,
+			!intel_wm_plane_visible(crtc_state, plane_state)))
 		return 0;
 
 	/*
@@ -5493,6 +5504,7 @@ static int skl_build_plane_wm(struct intel_crtc_state *crtc_state,
 static int icl_build_plane_wm(struct intel_crtc_state *crtc_state,
 			      const struct intel_plane_state *plane_state)
 {
+	struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev);
 	enum plane_id plane_id = to_intel_plane(plane_state->uapi.plane)->id;
 	int ret;
 
@@ -5504,8 +5516,9 @@ static int icl_build_plane_wm(struct intel_crtc_state *crtc_state,
 		const struct drm_framebuffer *fb = plane_state->hw.fb;
 		enum plane_id y_plane_id = plane_state->planar_linked_plane->id;
 
-		WARN_ON(!intel_wm_plane_visible(crtc_state, plane_state));
-		WARN_ON(!fb->format->is_yuv ||
+		drm_WARN_ON(&dev_priv->drm,
+			    !intel_wm_plane_visible(crtc_state, plane_state));
+		drm_WARN_ON(&dev_priv->drm, !fb->format->is_yuv ||
 			    fb->format->num_planes == 1);
 
 		ret = skl_build_plane_wm_single(crtc_state, plane_state,