drm/meson: Add G12A Support for VPP setup

Amlogic G12A needs a different VPP setup code, handle it here.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Tested-by: Jerome Brunet <jbrunet@baylibre.com>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190325141824.21259-4-narmstrong@baylibre.com

drivers/gpu/drm/meson/meson_vpp.c

@@ -112,13 +112,19 @@ void meson_vpp_init(struct meson_drm *priv)
 		writel_relaxed(0x20000, priv->io_base + _REG(VPP_DOLBY_CTRL));
 		writel_relaxed(0x1020080,
 				priv->io_base + _REG(VPP_DUMMY_DATA1));
-	}
+	} else if (meson_vpu_is_compatible(priv, "amlogic,meson-g12a-vpu"))
+		writel_relaxed(0xf, priv->io_base + _REG(DOLBY_PATH_CTRL));
 
 	/* Initialize vpu fifo control registers */
+	if (meson_vpu_is_compatible(priv, "amlogic,meson-g12a-vpu"))
+		writel_relaxed(0xfff << 20 | 0x1000,
+			       priv->io_base + _REG(VPP_OFIFO_SIZE));
+	else
 		writel_relaxed(readl_relaxed(priv->io_base + _REG(VPP_OFIFO_SIZE)) |
 				0x77f, priv->io_base + _REG(VPP_OFIFO_SIZE));
 	writel_relaxed(0x08080808, priv->io_base + _REG(VPP_HOLD_LINES));
 
+	if (!meson_vpu_is_compatible(priv, "amlogic,meson-g12a-vpu")) {
 		/* Turn off preblend */
 		writel_bits_relaxed(VPP_PREBLEND_ENABLE, 0,
 				    priv->io_base + _REG(VPP_MISC));
@@ -138,6 +144,7 @@ void meson_vpp_init(struct meson_drm *priv)
 				priv->io_base + _REG(VPP_PREBLEND_VD1_H_START_END));
 		writel_relaxed(4096,
 				priv->io_base + _REG(VPP_BLEND_VD2_H_START_END));
+	}
 
 	/* Disable Scalers */
 	writel_relaxed(0, priv->io_base + _REG(VPP_OSD_SC_CTRL0));