soc/mediatek/mt8183: Move dsi driver to common/

The mt8183 dsi driver can be shared with mt819x SoC.
Move dsi.c to common/ folder and rename it to dis_v2.c to
differentiate it from mt8173's dsi driver.

TEST=emerge-kukuki coreboot

Change-Id: I722d3e67f230ab8eb729900cdf15b922eb91a072
Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/48530
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>

src/soc/mediatek/common/mtk_mipi_dphy.c

@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <assert.h>
+#include <device/mmio.h>
+#include <delay.h>
+#include <soc/dsi.h>
+#include <soc/pll.h>
+#include <types.h>
+
+void mtk_dsi_configure_mipi_tx(u32 data_rate, u32 lanes)
+{
+	unsigned int txdiv0, txdiv1;
+	u64 pcw;
+
+	if (data_rate >= 2000 * MHz) {
+		txdiv0 = 0;
+		txdiv1 = 0;
+	} else if (data_rate >= 1000 * MHz) {
+		txdiv0 = 1;
+		txdiv1 = 0;
+	} else if (data_rate >= 500 * MHz) {
+		txdiv0 = 2;
+		txdiv1 = 0;
+	} else if (data_rate > 250 * MHz) {
+		/* (data_rate == 250MHz) is a special case that should go to the
+		   else-block below (txdiv0 = 4) */
+		txdiv0 = 3;
+		txdiv1 = 0;
+	} else {
+		/* MIN = 125 */
+		assert(data_rate >= MTK_DSI_DATA_RATE_MIN_MHZ * MHz);
+		txdiv0 = 4;
+		txdiv1 = 0;
+	}
+
+	clrbits32(&mipi_tx->pll_con4, BIT(11) | BIT(10));
+	setbits32(&mipi_tx->pll_pwr, AD_DSI_PLL_SDM_PWR_ON);
+	udelay(30);
+	clrbits32(&mipi_tx->pll_pwr, AD_DSI_PLL_SDM_ISO_EN);
+
+	pcw = (u64)data_rate * (1 << txdiv0) * (1 << txdiv1);
+	pcw <<= 24;
+	pcw /= CLK26M_HZ;
+
+	write32(&mipi_tx->pll_con0, pcw);
+	clrsetbits32(&mipi_tx->pll_con1, RG_DSI_PLL_POSDIV, txdiv0 << 8);
+	udelay(30);
+	setbits32(&mipi_tx->pll_con1, RG_DSI_PLL_EN);
+
+	/* BG_LPF_EN / BG_CORE_EN */
+	write32(&mipi_tx->lane_con, 0x3fff0180);
+	udelay(40);
+	write32(&mipi_tx->lane_con, 0x3fff00c0);
+
+	/* Switch OFF each Lane */
+	clrbits32(&mipi_tx->d0_sw_ctl_en, DSI_SW_CTL_EN);
+	clrbits32(&mipi_tx->d1_sw_ctl_en, DSI_SW_CTL_EN);
+	clrbits32(&mipi_tx->d2_sw_ctl_en, DSI_SW_CTL_EN);
+	clrbits32(&mipi_tx->d3_sw_ctl_en, DSI_SW_CTL_EN);
+	clrbits32(&mipi_tx->ck_sw_ctl_en, DSI_SW_CTL_EN);
+
+	setbits32(&mipi_tx->ck_ckmode_en, DSI_CK_CKMODE_EN);
+}
+
+void mtk_dsi_reset(void)
+{
+	write32(&dsi0->dsi_force_commit,
+		DSI_FORCE_COMMIT_USE_MMSYS | DSI_FORCE_COMMIT_ALWAYS);
+	write32(&dsi0->dsi_con_ctrl, 1);
+	write32(&dsi0->dsi_con_ctrl, 0);
+}