drm/i915: Use REG_BIT() & co. for ilk+ pfit registers

Polish the ilk+ pfit registers with REG_BIT() & co., and
also take the opportunity to unify the ivb/hsw vs. not checks
in ilk_pfit_enable() and ilk_get_pfit_config().
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230418175528.13117-8-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

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

@@ -3230,11 +3230,17 @@ static void ilk_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 ctl, pos, size;
+	enum pipe pipe;
 
 	ctl = intel_de_read(dev_priv, PF_CTL(crtc->pipe));
 	if ((ctl & PF_ENABLE) == 0)
 		return;
 
+	if (IS_IVYBRIDGE(dev_priv) || IS_HASWELL(dev_priv))
+		pipe = REG_FIELD_GET(PF_PIPE_SEL_MASK_IVB, ctl);
+	else
+		pipe = crtc->pipe;
+
 	crtc_state->pch_pfit.enabled = true;
 
 	pos = intel_de_read(dev_priv, PF_WIN_POS(crtc->pipe));
@@ -3249,8 +3255,7 @@ static void ilk_get_pfit_config(struct intel_crtc_state *crtc_state)
 	 * ivb/hsw (since we don't use the higher upscaling modes which
 	 * differentiates them) so just WARN about this case for now.
 	 */
-	drm_WARN_ON(&dev_priv->drm, DISPLAY_VER(dev_priv) == 7 &&
-		    (ctl & PF_PIPE_SEL_MASK_IVB) != PF_PIPE_SEL_IVB(crtc->pipe));
+	drm_WARN_ON(&dev_priv->drm, pipe != crtc->pipe);
 }
 
 static bool ilk_get_pipe_config(struct intel_crtc *crtc,

drivers/gpu/drm/i915/i915_reg.h

@@ -3998,16 +3998,16 @@
 
 /* CPU panel fitter */
 /* IVB+ has 3 fitters, 0 is 7x5 capable, the other two only 3x3 */
-#define _PFA_CTL_1               0x68080
-#define _PFB_CTL_1               0x68880
-#define  PF_ENABLE              (1 << 31)
-#define  PF_PIPE_SEL_MASK_IVB	(3 << 29)
-#define  PF_PIPE_SEL_IVB(pipe)	((pipe) << 29)
-#define  PF_FILTER_MASK		(3 << 23)
-#define  PF_FILTER_PROGRAMMED	(0 << 23)
-#define  PF_FILTER_MED_3x3	(1 << 23)
-#define  PF_FILTER_EDGE_ENHANCE	(2 << 23)
-#define  PF_FILTER_EDGE_SOFTEN	(3 << 23)
+#define _PFA_CTL_1		0x68080
+#define _PFB_CTL_1		0x68880
+#define   PF_ENABLE			REG_BIT(31)
+#define   PF_PIPE_SEL_MASK_IVB		REG_GENMASK(30, 29) /* ivb/hsw */
+#define   PF_PIPE_SEL_IVB(pipe)		REG_FIELD_PREP(PF_PIPE_SEL_MASK_IVB, (pipe))
+#define   PF_FILTER_MASK		REG_GENMASK(24, 23)
+#define   PF_FILTER_PROGRAMMED		REG_FIELD_PREP(PF_FILTER_MASK, 0)
+#define   PF_FILTER_MED_3x3		REG_FIELD_PREP(PF_FILTER_MASK, 1)
+#define   PF_FILTER_EDGE_ENHANCE	REG_FIELD_PREP(PF_FILTER_EDGE_MASK, 2)
+#define   PF_FILTER_EDGE_SOFTEN		REG_FIELD_PREP(PF_FILTER_EDGE_MASK, 3)
 #define _PFA_WIN_SZ		0x68074
 #define _PFB_WIN_SZ		0x68874
 #define _PFA_WIN_POS		0x68070