soc/mediatek/mt8183: Pass impedance data as a function argument

To make data flow more explicit, global variable 'impedance' is replaced
with a local variable, which is passed as a function argument.

BUG=none
BRANCH=kukui
TEST=Krane boots correctly

Change-Id: I0f6dacc33fda013a3476a10d9899821b7297e770
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35766
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>

3 files changed, 13 insertions, 5 deletions

diff --git a/src/soc/mediatek/mt8183/include/soc/dramc_common_mt8183.h b/src/soc/mediatek/mt8183/include/soc/dramc_common_mt8183.h
index ef6eaf162c..5ea9a52423 100644
--- a/src/soc/mediatek/mt8183/include/soc/dramc_common_mt8183.h
+++ b/src/soc/mediatek/mt8183/include/soc/dramc_common_mt8183.h
@@ -37,7 +37,8 @@ enum {
 
 enum dram_odt_type {
 	ODT_OFF = 0,
-	ODT_ON
+	ODT_ON,
+	ODT_MAX
 };
 
 enum {
diff --git a/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h b/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
index afd6718424..65ec075f71 100644
--- a/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
+++ b/src/soc/mediatek/mt8183/include/soc/dramc_pi_api.h
@@ -105,13 +105,16 @@ void dramc_runtime_config(void);
 void dramc_set_broadcast(u32 onoff);
 u32 dramc_get_broadcast(void);
 u8 get_freq_fsq(u8 freq_group);
-void dramc_init(const struct sdram_params *params, u8 freq_group);
-void dramc_sw_impedance_save_reg(u8 freq_group);
-void dramc_sw_impedance_cal(const struct sdram_params *params, u8 term_option);
+void dramc_init(const struct sdram_params *params, u8 freq_group,
+		const struct dram_impedance *impedance);
+void dramc_sw_impedance_save_reg(u8 freq_group,
+				 const struct dram_impedance *impedance);
+void dramc_sw_impedance_cal(const struct sdram_params *params, u8 term_option,
+			    struct dram_impedance *impedance);
 void dramc_apply_config_before_calibration(u8 freq_group);
 void dramc_apply_config_after_calibration(void);
 int dramc_calibrate_all_channels(const struct sdram_params *pams,
-	u8 freq_group);
+				 u8 freq_group);
 void dramc_hw_gating_onoff(u8 chn, bool onoff);
 void dramc_enable_phy_dcm(bool bEn);
 void dramc_mode_reg_write(u8 chn, u8 mr_idx, u8 value);
diff --git a/src/soc/mediatek/mt8183/include/soc/emi.h b/src/soc/mediatek/mt8183/include/soc/emi.h
index 1a364fb7a6..1b894803bd 100644
--- a/src/soc/mediatek/mt8183/include/soc/emi.h
+++ b/src/soc/mediatek/mt8183/include/soc/emi.h
@@ -82,6 +82,10 @@ enum {
 	LP4X_DDRFREQ_MAX,
 };
 
+struct dram_impedance {
+	u32 data[ODT_MAX][4];
+};
+
 extern const u8 phy_mapping[CHANNEL_MAX][16];
 
 int complex_mem_test(u8 *start, unsigned int len);