Merge v6.17.2linux-rolling-stable

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/include/linux/soc/qcom/ubwc.h b/include/linux/soc/qcom/ubwc.h
new file mode 100644
index 000000000000..1ed8b1b16bc9
--- /dev/null
+++ b/include/linux/soc/qcom/ubwc.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2018, The Linux Foundation
+ * Copyright (c) Qualcomm Technologies, Inc. and/or its subsidiaries.
+ */
+
+#ifndef __QCOM_UBWC_H__
+#define __QCOM_UBWC_H__
+
+#include <linux/bits.h>
+#include <linux/types.h>
+
+struct qcom_ubwc_cfg_data {
+	u32 ubwc_enc_version;
+	/* Can be read from MDSS_BASE + 0x58 */
+	u32 ubwc_dec_version;
+
+	/**
+	 * @ubwc_swizzle: Whether to enable level 1, 2 & 3 bank swizzling.
+	 *
+	 * UBWC 1.0 always enables all three levels.
+	 * UBWC 2.0 removes level 1 bank swizzling, leaving levels 2 & 3.
+	 * UBWC 4.0 adds the optional ability to disable levels 2 & 3.
+	 */
+	u32 ubwc_swizzle;
+#define UBWC_SWIZZLE_ENABLE_LVL1	BIT(0)
+#define UBWC_SWIZZLE_ENABLE_LVL2	BIT(1)
+#define UBWC_SWIZZLE_ENABLE_LVL3	BIT(2)
+
+	/**
+	 * @highest_bank_bit: Highest Bank Bit
+	 *
+	 * The Highest Bank Bit value represents the bit of the highest
+	 * DDR bank.  This should ideally use DRAM type detection.
+	 */
+	int highest_bank_bit;
+	bool ubwc_bank_spread;
+
+	/**
+	 * @macrotile_mode: Macrotile Mode
+	 *
+	 * Whether to use 4-channel macrotiling mode or the newer
+	 * 8-channel macrotiling mode introduced in UBWC 3.1. 0 is
+	 * 4-channel and 1 is 8-channel.
+	 */
+	bool macrotile_mode;
+};
+
+#define UBWC_1_0 0x10000000
+#define UBWC_2_0 0x20000000
+#define UBWC_3_0 0x30000000
+#define UBWC_4_0 0x40000000
+#define UBWC_4_3 0x40030000
+#define UBWC_5_0 0x50000000
+
+#if IS_ENABLED(CONFIG_QCOM_UBWC_CONFIG)
+const struct qcom_ubwc_cfg_data *qcom_ubwc_config_get_data(void);
+#else
+static inline const struct qcom_ubwc_cfg_data *qcom_ubwc_config_get_data(void)
+{
+	return ERR_PTR(-EOPNOTSUPP);
+}
+#endif
+
+static inline bool qcom_ubwc_get_ubwc_mode(const struct qcom_ubwc_cfg_data *cfg)
+{
+	bool ret = cfg->ubwc_enc_version == UBWC_1_0;
+
+	if (ret && !(cfg->ubwc_swizzle & UBWC_SWIZZLE_ENABLE_LVL1))
+		pr_err("UBWC config discrepancy - level 1 swizzling disabled on UBWC 1.0\n");
+
+	return ret;
+}
+
+#endif /* __QCOM_UBWC_H__ */