GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Amlogic Meson Video Processing Unit driver
+ *
+ * Copyright (c) 2018 BayLibre, SAS.
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include "meson_vpu.h"
+
+/* DMC Registers */
+#define DMC_CAV_LUT_DATAL	0x48 /* 0x12 offset in data sheet */
+#define CANVAS_WIDTH_LBIT	29
+#define CANVAS_WIDTH_LWID	3
+#define DMC_CAV_LUT_DATAH	0x4c /* 0x13 offset in data sheet */
+#define CANVAS_WIDTH_HBIT	0
+#define CANVAS_HEIGHT_BIT	9
+#define CANVAS_BLKMODE_BIT	24
+#define DMC_CAV_LUT_ADDR	0x50 /* 0x14 offset in data sheet */
+#define CANVAS_LUT_WR_EN	(0x2 << 8)
+#define CANVAS_LUT_RD_EN	(0x1 << 8)
+
+void meson_canvas_setup(struct meson_vpu_priv *priv,
+			u32 canvas_index, u32 addr,
+			u32 stride, u32 height,
+			unsigned int wrap,
+			unsigned int blkmode)
+{
+	dmc_write(DMC_CAV_LUT_DATAL,
+		  (((addr + 7) >> 3)) |
+		  (((stride + 7) >> 3) << CANVAS_WIDTH_LBIT));
+
+	dmc_write(DMC_CAV_LUT_DATAH,
+		  ((((stride + 7) >> 3) >> CANVAS_WIDTH_LWID) <<
+						CANVAS_WIDTH_HBIT) |
+		  (height << CANVAS_HEIGHT_BIT) |
+		  (wrap << 22) |
+		  (blkmode << CANVAS_BLKMODE_BIT));
+
+	dmc_write(DMC_CAV_LUT_ADDR,
+		  CANVAS_LUT_WR_EN | canvas_index);
+
+	/* Force a read-back to make sure everything is flushed. */
+	dmc_read(DMC_CAV_LUT_DATAH);
+}