[coreboot-gerrit] Change in coreboot[master]: mediatek/mt8183: Add EMI init for DDR driver init
Tristan Hsieh (Code Review)
gerrit at coreboot.org
Mon Oct 1 06:44:00 CEST 2018
Tristan Hsieh has uploaded this change for review. ( https://review.coreboot.org/28835
Change subject: mediatek/mt8183: Add EMI init for DDR driver init
......................................................................
mediatek/mt8183: Add EMI init for DDR driver init
Add EMI config to initialize memory.
BUG=b:80501386
BRANCH=none
TEST=Boots correctly on Kukui, and inits DRAM successfully with related
patches.
Signed-off-by: Huayang Duan <huayang.duan at mediatek.com>
Change-Id: I945181aa1c901fe78ec1f4478a928c600c1b1dea
---
M src/soc/mediatek/mt8183/Makefile.inc
M src/soc/mediatek/mt8183/emi.c
A src/soc/mediatek/mt8183/include/soc/dramc_common_mt8183.h
A src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
M src/soc/mediatek/mt8183/include/soc/emi.h
A src/soc/mediatek/mt8183/memory.c
6 files changed, 505 insertions(+), 2 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/35/28835/1
diff --git a/src/soc/mediatek/mt8183/Makefile.inc b/src/soc/mediatek/mt8183/Makefile.inc
index 8fece79..3cd845d 100644
--- a/src/soc/mediatek/mt8183/Makefile.inc
+++ b/src/soc/mediatek/mt8183/Makefile.inc
@@ -21,6 +21,7 @@
verstage-y += ../common/wdt.c
romstage-y += ../common/cbmem.c emi.c
+romstage-y += memory.c
romstage-y += ../common/gpio.c gpio.c
romstage-y += ../common/mmu_operations.c mmu_operations.c
romstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
diff --git a/src/soc/mediatek/mt8183/emi.c b/src/soc/mediatek/mt8183/emi.c
index e37fd56..6c36feb 100644
--- a/src/soc/mediatek/mt8183/emi.c
+++ b/src/soc/mediatek/mt8183/emi.c
@@ -13,9 +13,278 @@
* GNU General Public License for more details.
*/
+#include <arch/io.h>
#include <soc/emi.h>
+#include <soc/infracfg.h>
+#include <soc/dramc_pi_api.h>
+#include <soc/dramc_register.h>
+
+struct emi_regs *emi_regs = (void *)EMI_BASE;
+const u8 phy_mapping[CHANNEL_MAX][16] = {
+ [CHANNEL_A] = {
+ 1, 0, 2, 4, 3, 7, 5, 6,
+ 9, 8, 12, 11, 10, 15, 13, 14
+ },
+
+ [CHANNEL_B] = {
+ 0, 1, 5, 6, 3, 7, 4, 2,
+ 9, 8, 12, 15, 11, 14, 13, 10
+ }
+};
+
+void dramc_set_broadcast(u32 bOnOff)
+{
+ write32(&mt8183_infracfg->dramc_wbr, bOnOff);
+}
+
+u32 dramc_get_broadcast(void)
+{
+ return read32(&mt8183_infracfg->dramc_wbr);
+}
+
+static u64 get_ch_rank_size(u8 chn, u8 rank)
+{
+ u32 shift_for_16bit = 1;
+ u32 col_bit, row_bit;
+ u32 emi_cona = read32(&emi_regs->cona);
+
+ shift_for_16bit = (emi_cona & 0x2) ? 0 : 1;
+
+ col_bit = ((emi_cona >> (chn * 16 + rank * 2 + 4)) & 0x03) + 9;
+ row_bit = ((((emi_cona >> (24 - chn * 20 + rank)) & 0x01) << 2) +
+ ((emi_cona >> (12 + chn*16 + rank * 2)) & 0x03)) + 13;
+
+ /* data width (bytes) * 8 banks */
+ return ((u64)(1 << (row_bit + col_bit))) *
+ ((u64)(4 >> shift_for_16bit) * 8);
+}
+
+void dramc_get_rank_size(u64 *dram_rank_size)
+{
+ u64 ch0_rank0_size, ch0_rank1_size, ch1_rank0_size, ch1_rank1_size;
+ u64 ch_rank0_size = 0, ch_rank1_size = 0;
+ u32 emi_cona = read32(&emi_regs->cona);
+ u32 emi_conh = read32(&emi_regs->conh);
+
+ dram_rank_size[0] = 0;
+ dram_rank_size[1] = 0;
+
+ ch0_rank0_size = (emi_conh >> 16) & 0xf;
+ ch0_rank1_size = (emi_conh >> 20) & 0xf;
+ ch1_rank0_size = (emi_conh >> 24) & 0xf;
+ ch1_rank1_size = (emi_conh >> 28) & 0xf;
+
+ /* CH0 EMI */
+ if (ch0_rank0_size == 0)
+ ch_rank0_size = get_ch_rank_size(CHANNEL_A, RANK_0);
+ else
+ ch_rank0_size = (ch0_rank0_size * 256 << 20);
+
+ /* dual rank enable */
+ if ((emi_cona & (1 << 17)) != 0) {
+ if (ch0_rank1_size == 0)
+ ch_rank1_size = get_ch_rank_size(CHANNEL_A, RANK_1);
+ else
+ ch_rank1_size = (ch0_rank1_size * 256 << 20);
+ }
+
+ dram_rank_size[0] = ch_rank0_size;
+ dram_rank_size[1] = ch_rank1_size;
+
+ if (ch1_rank0_size == 0)
+ ch_rank0_size = get_ch_rank_size(CHANNEL_B, RANK_0);
+ else
+ ch_rank0_size = (ch1_rank0_size * 256 << 20);
+
+ if ((emi_cona & (1 << 16)) != 0) {
+ if (ch1_rank1_size == 0)
+ ch_rank1_size = get_ch_rank_size(CHANNEL_B, RANK_1);
+ else
+ ch_rank1_size = (ch1_rank1_size * 256 << 20);
+ }
+ dram_rank_size[0] += ch_rank0_size;
+ dram_rank_size[1] += ch_rank1_size;
+}
size_t sdram_size(void)
{
- return (size_t)4 * GiB;
+ size_t dram_size = 0;
+ u64 rank_size[RANK_MAX];
+
+ dramc_get_rank_size(&rank_size[0]);
+
+ for (int i = 0; i < RANK_MAX; i++) {
+ dram_size += rank_size[i];
+ dramc_show("rank%d size:0x%llx\n", i, rank_size[i]);
+ }
+
+ return dram_size;
+}
+
+static void set_rank_info_to_conf(const struct sdram_params *params)
+{
+ u8 u4value = 0;
+
+ /* CONA 17th bit 0: Disable dual rank mode
+ * 1: Enable dual rank mode */
+ u4value = ((params->emi_cona_val & (0x1 << 17)) >> 17) ? 0 : 1;
+ clrsetbits_le32(&ch[0].ao.arbctl, 0x1 << 12, u4value << 12);
+}
+
+static void set_MRR_pinmux_mapping(void)
+{
+ for (u8 chn = 0; chn < CHANNEL_MAX; chn++) {
+ const u8 *map = phy_mapping[chn];
+ write32(&ch[chn].ao.mrr_bit_mux1,
+ (map[0] << 0) | (map[1] << 8) |
+ (map[2] << 16) | (map[3] << 24));
+
+ write32(&ch[chn].ao.mrr_bit_mux2,
+ (map[4] << 0) | (map[5] << 8) |
+ (map[6] << 16) | (map[7] << 24));
+
+ write32(&ch[chn].ao.mrr_bit_mux3,
+ (map[8] << 0) | (map[9] << 8) |
+ (map[10] << 16) | (map[11] << 24));
+
+ write32(&ch[chn].ao.mrr_bit_mux4,
+ (map[12] << 0) | (map[13] << 8) |
+ (map[14] << 16) | (map[15] << 24));
+ }
+}
+
+static void global_option_init(const struct sdram_params *params)
+{
+ set_rank_info_to_conf(params);
+ set_MRR_pinmux_mapping();
+}
+
+static void emi_esl_setting1(void)
+{
+ dramc_set_broadcast(DRAMC_BROADCAST_ON);
+
+ write32(&emi_regs->cona, 0xa053a154);
+ write32(&emi_regs->conb, 0x17283544);
+ write32(&emi_regs->conc, 0x0a1a0b1a);
+ write32(&emi_regs->cond, 0x3657587a);
+ write32(&emi_regs->cone, 0x80400148);
+ write32(&emi_regs->conf, 0x00000000);
+ write32(&emi_regs->cong, 0x2b2b2a38);
+ write32(&emi_regs->conh, 0x00000000);
+ write32(&emi_regs->coni, 0x00008803);
+ write32(&emi_regs->conm, 0x000001ff);
+ write32(&emi_regs->conn, 0x00000000);
+ write32(&emi_regs->mdct, 0x11338c17);
+ write32(&emi_regs->mdct_2nd, 0x00001112);
+ write32(&emi_regs->iocl, 0xa8a8a8a8);
+ write32(&emi_regs->iocl_2nd, 0x25252525);
+ write32(&emi_regs->iocm, 0xa8a8a8a8);
+ write32(&emi_regs->iocm_2nd, 0x25252525);
+ write32(&emi_regs->testb, 0x00060037);
+ write32(&emi_regs->testc, 0x38460000);
+ write32(&emi_regs->testd, 0x00000000);
+ write32(&emi_regs->arba, 0x4020524f);
+ write32(&emi_regs->arbb, 0x4020504f);
+ write32(&emi_regs->arbc, 0xa0a050c6);
+ write32(&emi_regs->arbd, 0x000070cc);
+ write32(&emi_regs->arbe, 0x40406045);
+ write32(&emi_regs->arbf, 0xa0a070d5);
+ write32(&emi_regs->arbg, 0xa0a0504f);
+ write32(&emi_regs->arbh, 0xa0a0504f);
+ write32(&emi_regs->arbi, 0x00007108);
+ write32(&emi_regs->arbi_2nd, 0x00007108);
+ write32(&emi_regs->slct, 0x0001ff00);
+
+ write32(&ch[0].emi.chn_cona, 0x0400a051);
+ write32(&ch[0].emi.chn_conb, 0x00ff2048);
+ write32(&ch[0].emi.chn_conc, 0x00000000);
+ write32(&ch[0].emi.chn_mdct, 0x88008817);
+ write32(&ch[0].emi.chn_testb, 0x00030027);
+ write32(&ch[0].emi.chn_testc, 0x38460002);
+ write32(&ch[0].emi.chn_testd, 0x00000000);
+ write32(&ch[0].emi.chn_md_pre_mask, 0x00000f00);
+ write32(&ch[0].emi.chn_md_pre_mask_shf, 0x00000b00);
+ write32(&ch[0].emi.chn_arbi, 0x20406188);
+ write32(&ch[0].emi.chn_arbi_2nd, 0x20406188);
+ write32(&ch[0].emi.chn_arbj, 0x3719595e);
+ write32(&ch[0].emi.chn_arbj_2nd, 0x3719595e);
+ write32(&ch[0].emi.chn_arbk, 0x64f3fc79);
+ write32(&ch[0].emi.chn_arbk_2nd, 0x64f3fc79);
+ write32(&ch[0].emi.chn_slct, 0x00080888);
+ write32(&ch[0].emi.chn_arb_ref, 0x82410222);
+ write32(&ch[0].emi.chn_emi_shf0, 0x8a228c17);
+ write32(&ch[0].emi.chn_rkarb0, 0x0006002f);
+ write32(&ch[0].emi.chn_rkarb1, 0x01010101);
+ write32(&ch[0].emi.chn_rkarb2, 0x10100820);
+ write32(&ch[0].emi.chn_eco3, 0x00000000);
+
+ dramc_set_broadcast(DRAMC_BROADCAST_OFF);
+}
+
+static void emi_esl_setting2(void)
+{
+ dramc_set_broadcast(DRAMC_BROADCAST_ON);
+
+ write32(&ch[0].emi.chn_conc, 0x01);
+ write32(&emi_regs->conm, 0x05ff);
+
+ dramc_set_broadcast(DRAMC_BROADCAST_OFF);
+}
+
+static void emi_init(const struct sdram_params *params)
+{
+ emi_esl_setting1();
+
+ write32(&emi_regs->cona, params->emi_cona_val);
+ write32(&emi_regs->conf, params->emi_conf_val);
+ write32(&emi_regs->conh, params->emi_conh_val);
+
+ for (size_t chn = CHANNEL_A; chn < CHANNEL_MAX; chn++) {
+ write32(&ch[chn].emi.chn_cona, params->chn_emi_cona_val[chn]);
+ write32(&ch[chn].emi.chn_conc, 0);
+ }
+}
+
+static void emi_init2(const struct sdram_params *params)
+{
+ emi_esl_setting2();
+
+ setbits_le32(&emi_mpu->mpu_ctrl_d0 + 0x4 * 1, 0x1 << 4);
+ setbits_le32(&emi_mpu->mpu_ctrl_d0 + 0x4 * 7, 0x1 << 4);
+
+ write32(&emi_regs->bwct0, 0x0A000705);
+ write32(&emi_regs->bwct0_3rd, 0x0);
+
+ /* EMI QoS 0.5 */
+ write32(&emi_regs->bwct0_2nd, 0x00030023);
+ write32(&emi_regs->bwct0_4th, 0x00c00023);
+ write32(&emi_regs->bwct0_5th, 0x00240023);
+}
+
+static void dramc_init_pre_settings(void)
+{
+ clrsetbits_le32(&ch[0].phy.ca_cmd[8],
+ (0x1 << 21) | (0x1 << 20) | (0x1 << 19) | (0x1 << 18) |
+ (0x1F << 8) | (0x1f << 0),
+ (0x1 << 19) | (0xa << 8) | (0xa << 0));
+
+ setbits_le32(&ch[0].phy.misc_ctrl1, (0x1 << 12));
+ clrbits_le32(&ch[0].phy.misc_ctrl1, (0x1 << 13));
+ setbits_le32(&ch[0].phy.misc_ctrl1, (0x1 << 31));
+}
+
+static void init_dram(const struct sdram_params *params)
+{
+ global_option_init(params);
+ emi_init(params);
+
+ dramc_set_broadcast(DRAMC_BROADCAST_ON);
+ dramc_init_pre_settings();
+
+ emi_init2(params);
+}
+
+void mt_set_emi(const struct sdram_params *params)
+{
+ init_dram(params);
}
diff --git a/src/soc/mediatek/mt8183/include/soc/dramc_common_mt8183.h b/src/soc/mediatek/mt8183/include/soc/dramc_common_mt8183.h
new file mode 100644
index 0000000..e699e80
--- /dev/null
+++ b/src/soc/mediatek/mt8183/include/soc/dramc_common_mt8183.h
@@ -0,0 +1,56 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _DRAMC_COMMON_MT8183_H_
+#define _DRAMC_COMMON_MT8183_H_
+
+#define DRAM_DFS_SHUFFLE_MAX 3
+
+enum {
+ CHANNEL_A = 0,
+ CHANNEL_B,
+ CHANNEL_MAX
+};
+
+enum {
+ RANK_0 = 0,
+ RANK_1,
+ RANK_MAX
+};
+
+enum dram_odt_type {
+ ODT_OFF = 0,
+ ODT_ON
+};
+
+enum {
+ DQ_DATA_WIDTH = 16,
+ DQS_BIT_NUMBER = 8,
+ DQS_NUMBER = (DQ_DATA_WIDTH / DQS_BIT_NUMBER)
+};
+
+/*
+ * Internal CBT mode enum
+ * 1. Calibration flow uses vGet_Dram_CBT_Mode to
+ * differentiate between mixed vs non-mixed LP4
+ * 2. Declared as dram_cbt_mode[RANK_MAX] internally to
+ * store each rank's CBT mode type
+ */
+enum {
+ CBT_NORMAL_MODE = 0,
+ CBT_BYTE_MODE1
+};
+
+#endif /* _DRAMC_COMMON_MT8183_H_ */
diff --git a/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h b/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
new file mode 100644
index 0000000..e24bd6c
--- /dev/null
+++ b/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
@@ -0,0 +1,135 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _DRAMC_PI_API_MT8183_H
+#define _DRAMC_PI_API_MT8183_H
+
+#include <types.h>
+#include <soc/emi.h>
+#include <console/console.h>
+
+#define dramc_show(_x_...) printk(BIOS_INFO, _x_)
+#if IS_ENABLED(CONFIG_DEBUG_DRAM)
+#define dramc_dbg(_x_...) printk(BIOS_DEBUG, _x_)
+#else
+#define dramc_dbg(_x_...)
+#endif
+
+#define ENABLE 1
+#define DISABLE 0
+
+#define DATLAT_TAP_NUMBER 32
+
+#define MAX_CMP_CPT_WAIT_LOOP 10000
+#define TIME_OUT_CNT 100
+
+#define DRAMC_BROADCAST_ON 0x1f
+#define DRAMC_BROADCAST_OFF 0x0
+#define MAX_BACKUP_REG_CNT 32
+
+enum dram_te_op {
+ TE_OP_WRITE_READ_CHECK = 0,
+ TE_OP_READ_CHECK
+};
+
+enum {
+ DBI_OFF = 0,
+ DBI_ON
+};
+
+enum {
+ FSP_0 = 0,
+ FSP_1,
+ FSP_MAX
+};
+
+enum {
+ TX_DQ_DQS_MOVE_DQ_ONLY = 0,
+ TX_DQ_DQS_MOVE_DQM_ONLY,
+ TX_DQ_DQS_MOVE_DQ_DQM
+};
+
+enum {
+ MAX_CA_FINE_TUNE_DELAY = 63,
+ MAX_CS_FINE_TUNE_DELAY = 63,
+ MAX_CLK_FINE_TUNE_DELAY = 31,
+ CATRAINING_NUM = 6,
+ PASS_RANGE_NA = 0x7fff
+};
+
+enum {
+ GATING_OFF = 0,
+ GATING_ON = 1
+};
+
+enum {
+ CKE_FIXOFF = 0,
+ CKE_FIXON,
+ CKE_DYNAMIC
+};
+
+enum {
+ GATING_PATTERN_NUM = 0x23,
+ GATING_GOLDEND_DQSCNT = 0x4646
+};
+
+enum {
+ IMPCAL_STAGE_DRVP = 0x1,
+ IMPCAL_STAGE_DRVN,
+ IMPCAL_STAGE_TRACKING
+};
+
+enum {
+ DQS_GW_COARSE_STEP = 1,
+ DQS_GW_FINE_START = 0,
+ DQS_GW_FINE_END = 32,
+ DQS_GW_FINE_STEP = 4,
+ DQS_GW_FREQ_DIV = 4,
+ RX_DQS_CTL_LOOP = 8,
+ RX_DLY_DQSIENSTB_LOOP = 32
+};
+
+enum {
+ SAVE_VALUE,
+ RESTORE_VALUE
+};
+
+enum {
+ DQ_DIV_SHIFT = 3,
+ DQ_DIV_MASK = BIT(DQ_DIV_SHIFT) - 1,
+ OEN_SHIFT = 16,
+
+ DQS_DELAY_2T = 3,
+ DQS_DELAY_0P5T = 4,
+ DQS_DELAY = ((DQS_DELAY_2T << DQ_DIV_SHIFT) + DQS_DELAY_0P5T) << 5,
+
+ DQS_OEN_DELAY_2T = 3,
+ DQS_OEN_DELAY_0P5T = 1,
+
+ SELPH_DQS0 = (DQS_DELAY_2T << 0) | (DQS_DELAY_2T << 4) |
+ (DQS_DELAY_2T << 8) | (DQS_DELAY_2T << 12) |
+ (DQS_OEN_DELAY_2T << 16) | (DQS_OEN_DELAY_2T << 20) |
+ (DQS_OEN_DELAY_2T << 24) | (DQS_OEN_DELAY_2T << 28),
+
+ SELPH_DQS1 = (DQS_DELAY_0P5T << 0) | (DQS_DELAY_0P5T << 4) |
+ (DQS_DELAY_0P5T << 8) | (DQS_DELAY_0P5T << 12) |
+ (DQS_OEN_DELAY_0P5T << 16) | (DQS_OEN_DELAY_0P5T << 20) |
+ (DQS_OEN_DELAY_0P5T << 24) | (DQS_OEN_DELAY_0P5T << 28)
+};
+
+void dramc_get_rank_size(u64 *dram_rank_size);
+void dramc_set_broadcast(u32 onoff);
+u32 dramc_get_broadcast(void);
+#endif /* _DRAMC_PI_API_MT8183_H */
diff --git a/src/soc/mediatek/mt8183/include/soc/emi.h b/src/soc/mediatek/mt8183/include/soc/emi.h
index edc27a8..c3c8e81 100644
--- a/src/soc/mediatek/mt8183/include/soc/emi.h
+++ b/src/soc/mediatek/mt8183/include/soc/emi.h
@@ -18,7 +18,27 @@
#include <stdint.h>
#include <types.h>
+#include <soc/dramc_common_mt8183.h>
+struct sdram_params {
+ u32 impedance[2][4];
+ u8 wr_level[CHANNEL_MAX][RANK_MAX][DQS_NUMBER];
+ u8 cbt_cs[CHANNEL_MAX][RANK_MAX];
+ u8 cbt_mr12[CHANNEL_MAX][RANK_MAX];
+ s8 clk_delay;
+ s8 dqs_delay[CHANNEL_MAX];
+ u32 emi_cona_val;
+ u32 emi_conh_val;
+ u32 emi_conf_val;
+ u32 chn_emi_cona_val[CHANNEL_MAX];
+ u32 cbt_mode_extern;
+ u16 delay_cell_unit;
+};
+
+int complex_mem_test(u8 *start, unsigned int len);
size_t sdram_size(void);
+const struct sdram_params *get_sdram_config(void);
+void mt_set_emi(const struct sdram_params *params);
+void mt_mem_init(const struct sdram_params *params);
-#endif
+#endif /* SOC_MEDIATEK_MT8183_EMI_H */
diff --git a/src/soc/mediatek/mt8183/memory.c b/src/soc/mediatek/mt8183/memory.c
new file mode 100644
index 0000000..643ca6b
--- /dev/null
+++ b/src/soc/mediatek/mt8183/memory.c
@@ -0,0 +1,22 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <soc/emi.h>
+
+void mt_mem_init(const struct sdram_params *params)
+{
+ /* memory calibration */
+ mt_set_emi(params);
+}
--
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: I945181aa1c901fe78ec1f4478a928c600c1b1dea
Gerrit-Change-Number: 28835
Gerrit-PatchSet: 1
Gerrit-Owner: Tristan Hsieh <tristan.shieh at mediatek.com>
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