drm/i915: Flatten a bunch of the pfit functions

Most of the pfit functions are of the form:

func()
{
	if (pfit_enabled) {
		...
	}
}

Flip the pfit_enabled check around to flatten the functions.

And while we're touching all this let's do the usual
s/pipe_config/crtc_state/ replacement.
Reviewed-by: Manasi Navare <manasi.d.navare@intel.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200422161917.17389-2-ville.syrjala@linux.intel.com

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

@@ -6222,13 +6222,14 @@ static void skl_pfit_enable(const struct intel_crtc_state *crtc_state)
 	enum pipe pipe = crtc->pipe;
 	const struct intel_crtc_scaler_state *scaler_state =
 		&crtc_state->scaler_state;
-
-	if (crtc_state->pch_pfit.enabled) {
 	u16 uv_rgb_hphase, uv_rgb_vphase;
 	int pfit_w, pfit_h, hscale, vscale;
 	unsigned long irqflags;
 	int id;
 
+	if (!crtc_state->pch_pfit.enabled)
+		return;
+
 	if (drm_WARN_ON(&dev_priv->drm,
 			crtc_state->scaler_state.scaler_id < 0))
 		return;
@@ -6258,7 +6259,6 @@ static void skl_pfit_enable(const struct intel_crtc_state *crtc_state)
 			  crtc_state->pch_pfit.size);
 
 	spin_unlock_irqrestore(&dev_priv->uncore.lock, irqflags);
-	}
 }
 
 static void ilk_pfit_enable(const struct intel_crtc_state *crtc_state)
@@ -6267,22 +6267,23 @@ static void ilk_pfit_enable(const struct intel_crtc_state *crtc_state)
 	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	enum pipe pipe = crtc->pipe;
 
-	if (crtc_state->pch_pfit.enabled) {
+	if (!crtc_state->pch_pfit.enabled)
+		return;
+
 	/* Force use of hard-coded filter coefficients
 	 * as some pre-programmed values are broken,
 	 * e.g. x201.
 	 */
 	if (IS_IVYBRIDGE(dev_priv) || IS_HASWELL(dev_priv))
-			intel_de_write(dev_priv, PF_CTL(pipe),
-				       PF_ENABLE | PF_FILTER_MED_3x3 | PF_PIPE_SEL_IVB(pipe));
+		intel_de_write(dev_priv, PF_CTL(pipe), PF_ENABLE |
+			       PF_FILTER_MED_3x3 | PF_PIPE_SEL_IVB(pipe));
 	else
-			intel_de_write(dev_priv, PF_CTL(pipe),
-				       PF_ENABLE | PF_FILTER_MED_3x3);
+		intel_de_write(dev_priv, PF_CTL(pipe), PF_ENABLE |
+			       PF_FILTER_MED_3x3);
 	intel_de_write(dev_priv, PF_WIN_POS(pipe),
 		       crtc_state->pch_pfit.pos);
 	intel_de_write(dev_priv, PF_WIN_SZ(pipe),
 		       crtc_state->pch_pfit.size);
-	}
 }
 
 void hsw_enable_ips(const struct intel_crtc_state *crtc_state)
@@ -7099,11 +7100,12 @@ void ilk_pfit_disable(const struct intel_crtc_state *old_crtc_state)
 
 	/* To avoid upsetting the power well on haswell only disable the pfit if
 	 * it's in use. The hw state code will make sure we get this right. */
-	if (old_crtc_state->pch_pfit.enabled) {
+	if (!old_crtc_state->pch_pfit.enabled)
+		return;
+
 	intel_de_write(dev_priv, PF_CTL(pipe), 0);
 	intel_de_write(dev_priv, PF_WIN_POS(pipe), 0);
 	intel_de_write(dev_priv, PF_WIN_SZ(pipe), 0);
-	}
 }
 
 static void ilk_crtc_disable(struct intel_atomic_state *state,
@@ -7931,23 +7933,22 @@ static bool intel_crtc_supports_double_wide(const struct intel_crtc *crtc)
 		(crtc->pipe == PIPE_A || IS_I915G(dev_priv));
 }
 
-static u32 ilk_pipe_pixel_rate(const struct intel_crtc_state *pipe_config)
+static u32 ilk_pipe_pixel_rate(const struct intel_crtc_state *crtc_state)
 {
-	u32 pixel_rate;
-
-	pixel_rate = pipe_config->hw.adjusted_mode.crtc_clock;
+	u32 pixel_rate = crtc_state->hw.adjusted_mode.crtc_clock;
+	u32 pfit_size = crtc_state->pch_pfit.size;
+	u64 pipe_w, pipe_h, pfit_w, pfit_h;
 
 	/*
 	 * We only use IF-ID interlacing. If we ever use
 	 * PF-ID we'll need to adjust the pixel_rate here.
 	 */
 
-	if (pipe_config->pch_pfit.enabled) {
-		u64 pipe_w, pipe_h, pfit_w, pfit_h;
-		u32 pfit_size = pipe_config->pch_pfit.size;
+	if (!crtc_state->pch_pfit.enabled)
+		return pixel_rate;
 
-		pipe_w = pipe_config->pipe_src_w;
-		pipe_h = pipe_config->pipe_src_h;
+	pipe_w = crtc_state->pipe_src_w;
+	pipe_h = crtc_state->pipe_src_h;
 
 	pfit_w = (pfit_size >> 16) & 0xFFFF;
 	pfit_h = pfit_size & 0xFFFF;
@@ -7956,15 +7957,12 @@ static u32 ilk_pipe_pixel_rate(const struct intel_crtc_state *pipe_config)
 	if (pipe_h < pfit_h)
 		pipe_h = pfit_h;
 
-		if (drm_WARN_ON(pipe_config->uapi.crtc->dev,
+	if (drm_WARN_ON(crtc_state->uapi.crtc->dev,
 			!pfit_w || !pfit_h))
 		return pixel_rate;
 
-		pixel_rate = div_u64(mul_u32_u32(pixel_rate, pipe_w * pipe_h),
+	return div_u64(mul_u32_u32(pixel_rate, pipe_w * pipe_h),
 		       pfit_w * pfit_h);
-	}
-
-	return pixel_rate;
 }
 
 static void intel_crtc_compute_pixel_rate(struct intel_crtc_state *crtc_state)
@@ -9158,9 +9156,9 @@ static bool i9xx_has_pfit(struct drm_i915_private *dev_priv)
 		IS_PINEVIEW(dev_priv) || IS_MOBILE(dev_priv);
 }
 
-static void i9xx_get_pfit_config(struct intel_crtc *crtc,
-				 struct intel_crtc_state *pipe_config)
+static void i9xx_get_pfit_config(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);
 	u32 tmp;
 
@@ -9180,9 +9178,9 @@ static void i9xx_get_pfit_config(struct intel_crtc *crtc,
 			return;
 	}
 
-	pipe_config->gmch_pfit.control = tmp;
-	pipe_config->gmch_pfit.pgm_ratios = intel_de_read(dev_priv,
-							  PFIT_PGM_RATIOS);
+	crtc_state->gmch_pfit.control = tmp;
+	crtc_state->gmch_pfit.pgm_ratios =
+		intel_de_read(dev_priv, PFIT_PGM_RATIOS);
 }
 
 static void vlv_crtc_clock_get(struct intel_crtc *crtc,
@@ -9432,7 +9430,7 @@ static bool i9xx_get_pipe_config(struct intel_crtc *crtc,
 	intel_get_pipe_timings(crtc, pipe_config);
 	intel_get_pipe_src_size(crtc, pipe_config);
 
-	i9xx_get_pfit_config(crtc, pipe_config);
+	i9xx_get_pfit_config(pipe_config);
 
 	if (INTEL_GEN(dev_priv) >= 4) {
 		/* No way to read it out on pipes B and C */
@@ -10402,37 +10400,37 @@ static void ilk_get_fdi_m_n_config(struct intel_crtc *crtc,
 				     &pipe_config->fdi_m_n, NULL);
 }
 
-static void skl_get_pfit_config(struct intel_crtc *crtc,
-				struct intel_crtc_state *pipe_config)
+static void skl_get_pfit_config(struct intel_crtc_state *crtc_state)
 {
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
-	struct intel_crtc_scaler_state *scaler_state = &pipe_config->scaler_state;
-	u32 ps_ctrl = 0;
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+	struct intel_crtc_scaler_state *scaler_state = &crtc_state->scaler_state;
 	int id = -1;
 	int i;
 
 	/* find scaler attached to this pipe */
 	for (i = 0; i < crtc->num_scalers; i++) {
-		ps_ctrl = intel_de_read(dev_priv, SKL_PS_CTRL(crtc->pipe, i));
-		if (ps_ctrl & PS_SCALER_EN && !(ps_ctrl & PS_PLANE_SEL_MASK)) {
+		u32 tmp;
+
+		tmp = intel_de_read(dev_priv, SKL_PS_CTRL(crtc->pipe, i));
+		if ((tmp & (PS_SCALER_EN | PS_PLANE_SEL_MASK)) != PS_SCALER_EN)
+			continue;
+
 		id = i;
-			pipe_config->pch_pfit.enabled = true;
-			pipe_config->pch_pfit.pos = intel_de_read(dev_priv,
-								  SKL_PS_WIN_POS(crtc->pipe, i));
-			pipe_config->pch_pfit.size = intel_de_read(dev_priv,
-								   SKL_PS_WIN_SZ(crtc->pipe, i));
+		crtc_state->pch_pfit.enabled = true;
+		crtc_state->pch_pfit.pos =
+			intel_de_read(dev_priv, SKL_PS_WIN_POS(crtc->pipe, i));
+		crtc_state->pch_pfit.size =
+			intel_de_read(dev_priv, SKL_PS_WIN_SZ(crtc->pipe, i));
 		scaler_state->scalers[i].in_use = true;
 		break;
 	}
-	}
 
 	scaler_state->scaler_id = id;
-	if (id >= 0) {
+	if (id >= 0)
 		scaler_state->scaler_users |= (1 << SKL_CRTC_INDEX);
-	} else {
+	else
 		scaler_state->scaler_users &= ~(1 << SKL_CRTC_INDEX);
-	}
 }
 
 static void
@@ -10568,30 +10566,29 @@ skl_get_initial_plane_config(struct intel_crtc *crtc,
 	kfree(intel_fb);
 }
 
-static void ilk_get_pfit_config(struct intel_crtc *crtc,
-				struct intel_crtc_state *pipe_config)
+static void ilk_get_pfit_config(struct intel_crtc_state *crtc_state)
 {
-	struct drm_device *dev = crtc->base.dev;
-	struct drm_i915_private *dev_priv = to_i915(dev);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
 	u32 tmp;
 
 	tmp = intel_de_read(dev_priv, PF_CTL(crtc->pipe));
+	if ((tmp & PF_ENABLE) == 0)
+		return;
 
-	if (tmp & PF_ENABLE) {
-		pipe_config->pch_pfit.enabled = true;
-		pipe_config->pch_pfit.pos = intel_de_read(dev_priv,
-							  PF_WIN_POS(crtc->pipe));
-		pipe_config->pch_pfit.size = intel_de_read(dev_priv,
-							   PF_WIN_SZ(crtc->pipe));
+	crtc_state->pch_pfit.enabled = true;
+	crtc_state->pch_pfit.pos =
+		intel_de_read(dev_priv, PF_WIN_POS(crtc->pipe));
+	crtc_state->pch_pfit.size =
+		intel_de_read(dev_priv, PF_WIN_SZ(crtc->pipe));
 
-		/* We currently do not free assignements of panel fitters on
+	/*
+	 * We currently do not free assignements of panel fitters on
 	 * ivb/hsw (since we don't use the higher upscaling modes which
-		 * differentiates them) so just WARN about this case for now. */
-		if (IS_GEN(dev_priv, 7)) {
-			drm_WARN_ON(dev, (tmp & PF_PIPE_SEL_MASK_IVB) !=
-				    PF_PIPE_SEL_IVB(crtc->pipe));
-		}
-	}
+	 * differentiates them) so just WARN about this case for now.
+	 */
+	drm_WARN_ON(&dev_priv->drm, IS_GEN(dev_priv, 7) &&
+		    (tmp & PF_PIPE_SEL_MASK_IVB) != PF_PIPE_SEL_IVB(crtc->pipe));
 }
 
 static bool ilk_get_pipe_config(struct intel_crtc *crtc,
@@ -10702,7 +10699,7 @@ static bool ilk_get_pipe_config(struct intel_crtc *crtc,
 	intel_get_pipe_timings(crtc, pipe_config);
 	intel_get_pipe_src_size(crtc, pipe_config);
 
-	ilk_get_pfit_config(crtc, pipe_config);
+	ilk_get_pfit_config(pipe_config);
 
 	ret = true;
 
@@ -11176,9 +11173,9 @@ static bool hsw_get_pipe_config(struct intel_crtc *crtc,
 		power_domain_mask |= BIT_ULL(power_domain);
 
 		if (INTEL_GEN(dev_priv) >= 9)
-			skl_get_pfit_config(crtc, pipe_config);
+			skl_get_pfit_config(pipe_config);
 		else
-			ilk_get_pfit_config(crtc, pipe_config);
+			ilk_get_pfit_config(pipe_config);
 	}
 
 	if (hsw_crtc_supports_ips(crtc)) {