Add basic driver for mipi display on rockchip soc platform.
Signed-off-by: Eric Gao eric.gao@rock-chips.com Acked-by: Simon Glass sjg@chromium.org
---
Changes in v7: None Changes in v6: None Changes in v5: -Merge Kconfig and Makefile changes into this patch.
Changes in v4: None Changes in v3: -Split mipi dsi driver file and header as a single patch.
Changes in v2: None
.../include/asm/arch-rockchip/rockchip_mipi_dsi.h | 195 ++++++++ drivers/video/rockchip/Kconfig | 9 +- drivers/video/rockchip/Makefile | 1 + drivers/video/rockchip/rk_mipi.c | 491 +++++++++++++++++++++ 4 files changed, 695 insertions(+), 1 deletion(-) create mode 100644 arch/arm/include/asm/arch-rockchip/rockchip_mipi_dsi.h create mode 100644 drivers/video/rockchip/rk_mipi.c
diff --git a/arch/arm/include/asm/arch-rockchip/rockchip_mipi_dsi.h b/arch/arm/include/asm/arch-rockchip/rockchip_mipi_dsi.h new file mode 100644 index 0000000..d7f79c5 --- /dev/null +++ b/arch/arm/include/asm/arch-rockchip/rockchip_mipi_dsi.h @@ -0,0 +1,195 @@ +/* + * Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd + * author: Eric Gao eric.gao@rock-chips.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef ROCKCHIP_MIPI_DSI_H +#define ROCKCHIP_MIPI_DSI_H + +/* + * All these mipi controller register declaration provide reg address offset, + * bits width, bit offset for a specified register bits. With these message, we + * can set or clear every bits individually for a 32bit widthregister. We use + * DSI_HOST_BITS macro definition to combinat these message using the following + * format: val(32bit) = addr(16bit) | width(8bit) | offest(8bit) + * For example: + * #define SHUTDOWNZ DSI_HOST_BITS(0x004, 1, 0) + * means SHUTDOWNZ is a signal reg bit with bit offset qual 0,and it's reg addr + * offset is 0x004.The conbinat result = (0x004 << 16) | (1 << 8) | 0 + */ +#define ADDR_SHIFT 16 +#define BITS_SHIFT 8 +#define OFFSET_SHIFT 0 +#define DSI_HOST_BITS(addr, bits, bit_offset) \ +((addr << ADDR_SHIFT) | (bits << BITS_SHIFT) | (bit_offset << OFFSET_SHIFT)) + +/* DWC_DSI_VERSION_0x3133302A */ +#define VERSION DSI_HOST_BITS(0x000, 32, 0) +#define SHUTDOWNZ DSI_HOST_BITS(0x004, 1, 0) +#define TO_CLK_DIVISION DSI_HOST_BITS(0x008, 8, 8) +#define TX_ESC_CLK_DIVISION DSI_HOST_BITS(0x008, 8, 0) +#define DPI_VCID DSI_HOST_BITS(0x00c, 2, 0) +#define EN18_LOOSELY DSI_HOST_BITS(0x010, 1, 8) +#define DPI_COLOR_CODING DSI_HOST_BITS(0x010, 4, 0) +#define COLORM_ACTIVE_LOW DSI_HOST_BITS(0x014, 1, 4) +#define SHUTD_ACTIVE_LOW DSI_HOST_BITS(0x014, 1, 3) +#define HSYNC_ACTIVE_LOW DSI_HOST_BITS(0x014, 1, 2) +#define VSYNC_ACTIVE_LOW DSI_HOST_BITS(0x014, 1, 1) +#define DATAEN_ACTIVE_LOW DSI_HOST_BITS(0x014, 1, 0) +#define OUTVACT_LPCMD_TIME DSI_HOST_BITS(0x018, 8, 16) +#define INVACT_LPCMD_TIME DSI_HOST_BITS(0x018, 8, 0) +#define CRC_RX_EN DSI_HOST_BITS(0x02c, 1, 4) +#define ECC_RX_EN DSI_HOST_BITS(0x02c, 1, 3) +#define BTA_EN DSI_HOST_BITS(0x02c, 1, 2) +#define EOTP_RX_EN DSI_HOST_BITS(0x02c, 1, 1) +#define EOTP_TX_EN DSI_HOST_BITS(0x02c, 1, 0) +#define GEN_VID_RX DSI_HOST_BITS(0x030, 2, 0) +#define CMD_VIDEO_MODE DSI_HOST_BITS(0x034, 1, 0) +#define VPG_ORIENTATION DSI_HOST_BITS(0x038, 1, 24) +#define VPG_MODE DSI_HOST_BITS(0x038, 1, 20) +#define VPG_EN DSI_HOST_BITS(0x038, 1, 16) +#define LP_CMD_EN DSI_HOST_BITS(0x038, 1, 15) +#define FRAME_BTA_ACK_EN DSI_HOST_BITS(0x038, 1, 14) +#define LP_HFP_EN DSI_HOST_BITS(0x038, 1, 13) +#define LP_HBP_EN DSI_HOST_BITS(0x038, 1, 12) +#define LP_VACT_EN DSI_HOST_BITS(0x038, 1, 11) +#define LP_VFP_EN DSI_HOST_BITS(0x038, 1, 10) +#define LP_VBP_EN DSI_HOST_BITS(0x038, 1, 9) +#define LP_VSA_EN DSI_HOST_BITS(0x038, 1, 8) +#define VID_MODE_TYPE DSI_HOST_BITS(0x038, 2, 0) +#define VID_PKT_SIZE DSI_HOST_BITS(0x03c, 14, 0) +#define NUM_CHUNKS DSI_HOST_BITS(0x040, 13, 0) +#define NULL_PKT_SIZE DSI_HOST_BITS(0x044, 13, 0) +#define VID_HSA_TIME DSI_HOST_BITS(0x048, 12, 0) +#define VID_HBP_TIME DSI_HOST_BITS(0x04c, 12, 0) +#define VID_HLINE_TIME DSI_HOST_BITS(0x050, 15, 0) +#define VID_VSA_LINES DSI_HOST_BITS(0x054, 10, 0) +#define VID_VBP_LINES DSI_HOST_BITS(0x058, 10, 0) +#define VID_VFP_LINES DSI_HOST_BITS(0x05c, 10, 0) +#define VID_ACTIVE_LINES DSI_HOST_BITS(0x060, 14, 0) +#define EDPI_CMD_SIZE DSI_HOST_BITS(0x064, 16, 0) +#define MAX_RD_PKT_SIZE DSI_HOST_BITS(0x068, 1, 24) +#define DCS_LW_TX DSI_HOST_BITS(0x068, 1, 19) +#define DCS_SR_0P_TX DSI_HOST_BITS(0x068, 1, 18) +#define DCS_SW_1P_TX DSI_HOST_BITS(0x068, 1, 17) +#define DCS_SW_0P_TX DSI_HOST_BITS(0x068, 1, 16) +#define GEN_LW_TX DSI_HOST_BITS(0x068, 1, 14) +#define GEN_SR_2P_TX DSI_HOST_BITS(0x068, 1, 13) +#define GEN_SR_1P_TX DSI_HOST_BITS(0x068, 1, 12) +#define GEN_SR_0P_TX DSI_HOST_BITS(0x068, 1, 11) +#define GEN_SW_2P_TX DSI_HOST_BITS(0x068, 1, 10) +#define GEN_SW_1P_TX DSI_HOST_BITS(0x068, 1, 9) +#define GEN_SW_0P_TX DSI_HOST_BITS(0x068, 1, 8) +#define ACK_RQST_EN DSI_HOST_BITS(0x068, 1, 1) +#define TEAR_FX_EN DSI_HOST_BITS(0x068, 1, 0) +#define GEN_WC_MSBYTE DSI_HOST_BITS(0x06c, 14, 16) +#define GEN_WC_LSBYTE DSI_HOST_BITS(0x06c, 8, 8) +#define GEN_VC DSI_HOST_BITS(0x06c, 2, 6) +#define GEN_DT DSI_HOST_BITS(0x06c, 6, 0) +#define GEN_PLD_DATA DSI_HOST_BITS(0x070, 32, 0) +#define GEN_RD_CMD_BUSY DSI_HOST_BITS(0x074, 1, 6) +#define GEN_PLD_R_FULL DSI_HOST_BITS(0x074, 1, 5) +#define GEN_PLD_R_EMPTY DSI_HOST_BITS(0x074, 1, 4) +#define GEN_PLD_W_FULL DSI_HOST_BITS(0x074, 1, 3) +#define GEN_PLD_W_EMPTY DSI_HOST_BITS(0x074, 1, 2) +#define GEN_CMD_FULL DSI_HOST_BITS(0x074, 1, 1) +#define GEN_CMD_EMPTY DSI_HOST_BITS(0x074, 1, 0) +#define HSTX_TO_CNT DSI_HOST_BITS(0x078, 16, 16) +#define LPRX_TO_CNT DSI_HOST_BITS(0x078, 16, 0) +#define HS_RD_TO_CNT DSI_HOST_BITS(0x07c, 16, 0) +#define LP_RD_TO_CNT DSI_HOST_BITS(0x080, 16, 0) +#define PRESP_TO_MODE DSI_HOST_BITS(0x084, 1, 24) +#define HS_WR_TO_CNT DSI_HOST_BITS(0x084, 16, 0) +#define LP_WR_TO_CNT DSI_HOST_BITS(0x088, 16, 0) +#define BTA_TO_CNT DSI_HOST_BITS(0x08c, 16, 0) +#define AUTO_CLKLANE_CTRL DSI_HOST_BITS(0x094, 1, 1) +#define PHY_TXREQUESTCLKHS DSI_HOST_BITS(0x094, 1, 0) +#define PHY_HS2LP_TIME_CLK_LANE DSI_HOST_BITS(0x098, 10, 16) +#define PHY_HS2HS_TIME_CLK_LANE DSI_HOST_BITS(0x098, 10, 0) +#define PHY_HS2LP_TIME DSI_HOST_BITS(0x09c, 8, 24) +#define PHY_LP2HS_TIME DSI_HOST_BITS(0x09c, 8, 16) +#define MAX_RD_TIME DSI_HOST_BITS(0x09c, 15, 0) +#define PHY_FORCEPLL DSI_HOST_BITS(0x0a0, 1, 3) +#define PHY_ENABLECLK DSI_HOST_BITS(0x0a0, 1, 2) +#define PHY_RSTZ DSI_HOST_BITS(0x0a0, 1, 1) +#define PHY_SHUTDOWNZ DSI_HOST_BITS(0x0a0, 1, 0) +#define PHY_STOP_WAIT_TIME DSI_HOST_BITS(0x0a4, 8, 8) +#define N_LANES DSI_HOST_BITS(0x0a4, 2, 0) +#define PHY_TXEXITULPSLAN DSI_HOST_BITS(0x0a8, 1, 3) +#define PHY_TXREQULPSLAN DSI_HOST_BITS(0x0a8, 1, 2) +#define PHY_TXEXITULPSCLK DSI_HOST_BITS(0x0a8, 1, 1) +#define PHY_TXREQULPSCLK DSI_HOST_BITS(0x0a8, 1, 0) +#define PHY_TX_TRIGGERS DSI_HOST_BITS(0x0ac, 4, 0) +#define PHYSTOPSTATECLKLANE DSI_HOST_BITS(0x0b0, 1, 2) +#define PHYLOCK DSI_HOST_BITS(0x0b0, 1, 0) +#define PHY_TESTCLK DSI_HOST_BITS(0x0b4, 1, 1) +#define PHY_TESTCLR DSI_HOST_BITS(0x0b4, 1, 0) +#define PHY_TESTEN DSI_HOST_BITS(0x0b8, 1, 16) +#define PHY_TESTDOUT DSI_HOST_BITS(0x0b8, 8, 8) +#define PHY_TESTDIN DSI_HOST_BITS(0x0b8, 8, 0) +#define PHY_TEST_CTRL1 DSI_HOST_BITS(0x0b8, 17, 0) +#define PHY_TEST_CTRL0 DSI_HOST_BITS(0x0b4, 2, 0) +#define INT_ST0 DSI_HOST_BITS(0x0bc, 21, 0) +#define INT_ST1 DSI_HOST_BITS(0x0c0, 18, 0) +#define INT_MKS0 DSI_HOST_BITS(0x0c4, 21, 0) +#define INT_MKS1 DSI_HOST_BITS(0x0c8, 18, 0) +#define INT_FORCE0 DSI_HOST_BITS(0x0d8, 21, 0) +#define INT_FORCE1 DSI_HOST_BITS(0x0dc, 18, 0) + +#define CODE_HS_RX_CLOCK 0x34 +#define CODE_HS_RX_LANE0 0x44 +#define CODE_HS_RX_LANE1 0x54 +#define CODE_HS_RX_LANE2 0x84 +#define CODE_HS_RX_LANE3 0x94 + +#define CODE_PLL_VCORANGE_VCOCAP 0x10 +#define CODE_PLL_CPCTRL 0x11 +#define CODE_PLL_LPF_CP 0x12 +#define CODE_PLL_INPUT_DIV_RAT 0x17 +#define CODE_PLL_LOOP_DIV_RAT 0x18 +#define CODE_PLL_INPUT_LOOP_DIV_RAT 0x19 +#define CODE_BANDGAP_BIAS_CTRL 0x20 +#define CODE_TERMINATION_CTRL 0x21 +#define CODE_AFE_BIAS_BANDGAP_ANOLOG 0x22 + +#define CODE_HSTXDATALANEREQUSETSTATETIME 0x70 +#define CODE_HSTXDATALANEPREPARESTATETIME 0x71 +#define CODE_HSTXDATALANEHSZEROSTATETIME 0x72 + +/* Transmission mode between vop and MIPI controller */ +enum vid_mode_type_t { + NON_BURST_SYNC_PLUSE = 0, + NON_BURST_SYNC_EVENT, + BURST_MODE, +}; + +enum cmd_video_mode { + VIDEO_MODE = 0, + CMD_MODE, +}; + +/* Indicate MIPI DSI color mode */ +enum dpi_color_coding { + DPI_16BIT_CFG_1 = 0, + DPI_16BIT_CFG_2, + DPI_16BIT_CFG_3, + DPI_18BIT_CFG_1, + DPI_18BIT_CFG_2, + DPI_24BIT, + DPI_20BIT_YCBCR_422_LP, + DPI_24BIT_YCBCR_422, + DPI_16BIT_YCBCR_422, + DPI_30BIT, + DPI_36BIT, + DPI_12BIT_YCBCR_420, +}; + +/* Indicate which VOP the MIPI DSI use, bit or little one */ +enum vop_id { + VOP_B = 0, + VOP_L, +}; + +#endif /* end of ROCKCHIP_MIPI_DSI_H */ diff --git a/drivers/video/rockchip/Kconfig b/drivers/video/rockchip/Kconfig index d94afbd..9267b28 100644 --- a/drivers/video/rockchip/Kconfig +++ b/drivers/video/rockchip/Kconfig @@ -39,5 +39,12 @@ config DISPLAY_ROCKCHIP_HDMI help This enables High-Definition Multimedia Interface display support.
-endif +config DISPLAY_ROCKCHIP_MIPI + bool "MIPI Port" + depends on VIDEO_ROCKCHIP + help + This enables Mobile Industry Processor Interface(MIPI) display + support. The mipi controller and dphy on rk3288& rk3399 support + 16,18, 24 bits per pixel with upto 2k resolution ratio.
+endif diff --git a/drivers/video/rockchip/Makefile b/drivers/video/rockchip/Makefile index 3bb0519..c742902 100644 --- a/drivers/video/rockchip/Makefile +++ b/drivers/video/rockchip/Makefile @@ -10,4 +10,5 @@ obj-y += rk_vop.o obj-$(CONFIG_DISPLAY_ROCKCHIP_EDP) += rk_edp.o obj-$(CONFIG_DISPLAY_ROCKCHIP_LVDS) += rk_lvds.o obj-$(CONFIG_DISPLAY_ROCKCHIP_HDMI) += rk_hdmi.o ../dw_hdmi.o +obj-$(CONFIG_DISPLAY_ROCKCHIP_MIPI) += rk_mipi.o endif diff --git a/drivers/video/rockchip/rk_mipi.c b/drivers/video/rockchip/rk_mipi.c new file mode 100644 index 0000000..4d9d12e --- /dev/null +++ b/drivers/video/rockchip/rk_mipi.c @@ -0,0 +1,491 @@ +/* + * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd + * Author: Eric Gao eric.gao@rock-chips.com + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <clk.h> +#include <display.h> +#include <dm.h> +#include <fdtdec.h> +#include <panel.h> +#include <regmap.h> +#include <syscon.h> +#include <asm/gpio.h> +#include <asm/hardware.h> +#include <asm/io.h> +#include <dm/uclass-internal.h> +#include <linux/kernel.h> +#include <asm/arch/clock.h> +#include <asm/arch/cru_rk3399.h> +#include <asm/arch/grf_rk3399.h> +#include <asm/arch/rockchip_mipi_dsi.h> +#include <dt-bindings/clock/rk3288-cru.h> + +DECLARE_GLOBAL_DATA_PTR; + +/* + * Private information for rk mipi + * + * @regs: mipi controller address + * @grf: GRF register + * @panel: panel assined by device tree + * @ref_clk: reference clock for mipi dsi pll + * @sysclk: config clock for mipi dsi register + * @pix_clk: pixel clock for vop->dsi data transmission + * @phy_clk: mipi dphy output clock + * @txbyte_clk: clock for dsi->dphy high speed data transmission + * @txesc_clk: clock for tx esc mode + */ +struct rk_mipi_priv { + void __iomem *regs; + struct rk3399_grf_regs *grf; + struct udevice *panel; + struct mipi_dsi *dsi; + u32 ref_clk; + u32 sys_clk; + u32 pix_clk; + u32 phy_clk; + u32 txbyte_clk; + u32 txesc_clk; +}; + +static int rk_mipi_read_timing(struct udevice *dev, + struct display_timing *timing) +{ + int ret; + + ret = fdtdec_decode_display_timing(gd->fdt_blob, dev_of_offset(dev), + 0, timing); + if (ret) { + debug("%s: Failed to decode display timing (ret=%d)\n", + __func__, ret); + return -EINVAL; + } + + return 0; +} + +/* + * Register write function used only for mipi dsi controller. + * Parameter: + * @regs: mipi controller address + * @reg: combination of regaddr(16bit)|bitswidth(8bit)|offset(8bit) you can + * use define in rk_mipi.h directly for this parameter + * @val: value that will be write to specified bits of register + */ +static void rk_mipi_dsi_write(u32 regs, u32 reg, u32 val) +{ + u32 dat; + u32 mask; + u32 offset = (reg >> OFFSET_SHIFT) & 0xff; + u32 bits = (reg >> BITS_SHIFT) & 0xff; + u64 addr = (reg >> ADDR_SHIFT) + regs; + + /* Mask for specifiled bits,the corresponding bits will be clear */ + mask = ~((0xffffffff << offset) & (0xffffffff >> (32 - offset - bits))); + + /* Make sure val in the available range */ + val &= ~(0xffffffff << bits); + + /* Get register's original val */ + dat = readl(addr); + + /* Clear specified bits */ + dat &= mask; + + /* Fill specified bits */ + dat |= val << offset; + + writel(dat, addr); +} + +static int rk_mipi_dsi_enable(struct udevice *dev, + const struct display_timing *timing) +{ + int node, timing_node; + int val; + struct rk_mipi_priv *priv = dev_get_priv(dev); + u64 regs = (u64)priv->regs; + struct display_plat *disp_uc_plat = dev_get_uclass_platdata(dev); + u32 txbyte_clk = priv->txbyte_clk; + u32 txesc_clk = priv->txesc_clk; + + txesc_clk = txbyte_clk/(txbyte_clk/txesc_clk + 1); + + /* Select the video source */ + switch (disp_uc_plat->source_id) { + case VOP_B: + rk_clrsetreg(&priv->grf->soc_con20, GRF_DSI0_VOP_SEL_MASK, + GRF_DSI0_VOP_SEL_B << GRF_DSI0_VOP_SEL_SHIFT); + break; + case VOP_L: + rk_clrsetreg(&priv->grf->soc_con20, GRF_DSI0_VOP_SEL_MASK, + GRF_DSI0_VOP_SEL_L << GRF_DSI0_VOP_SEL_SHIFT); + break; + default: + debug("%s: Invalid VOP id\n", __func__); + return -EINVAL; + } + + /* Set Controller as TX mode */ + val = GRF_DPHY_TX0_RXMODE_DIS << GRF_DPHY_TX0_RXMODE_SHIFT; + rk_clrsetreg(&priv->grf->soc_con22, GRF_DPHY_TX0_RXMODE_MASK, val); + + /* Exit tx stop mode */ + val |= GRF_DPHY_TX0_TXSTOPMODE_DIS << GRF_DPHY_TX0_TXSTOPMODE_SHIFT; + rk_clrsetreg(&priv->grf->soc_con22, GRF_DPHY_TX0_TXSTOPMODE_MASK, val); + + /* Disable turnequest */ + val |= GRF_DPHY_TX0_TURNREQUEST_DIS << GRF_DPHY_TX0_TURNREQUEST_SHIFT; + rk_clrsetreg(&priv->grf->soc_con22, GRF_DPHY_TX0_TURNREQUEST_MASK, val); + + /* Set Display timing parameter */ + rk_mipi_dsi_write(regs, VID_HSA_TIME, timing->hsync_len.typ); + rk_mipi_dsi_write(regs, VID_HBP_TIME, timing->hback_porch.typ); + rk_mipi_dsi_write(regs, VID_HLINE_TIME, (timing->hsync_len.typ + + timing->hback_porch.typ + timing->hactive.typ + + timing->hfront_porch.typ)); + rk_mipi_dsi_write(regs, VID_VSA_LINES, timing->vsync_len.typ); + rk_mipi_dsi_write(regs, VID_VBP_LINES, timing->vback_porch.typ); + rk_mipi_dsi_write(regs, VID_VFP_LINES, timing->vfront_porch.typ); + rk_mipi_dsi_write(regs, VID_ACTIVE_LINES, timing->vactive.typ); + + /* Set Signal Polarity */ + val = (timing->flags & DISPLAY_FLAGS_HSYNC_LOW) ? 1 : 0; + rk_mipi_dsi_write(regs, HSYNC_ACTIVE_LOW, val); + + val = (timing->flags & DISPLAY_FLAGS_VSYNC_LOW) ? 1 : 0; + rk_mipi_dsi_write(regs, VSYNC_ACTIVE_LOW, val); + + val = (timing->flags & DISPLAY_FLAGS_DE_LOW) ? 1 : 0; + rk_mipi_dsi_write(regs, DISPLAY_FLAGS_DE_LOW, val); + + val = (timing->flags & DISPLAY_FLAGS_PIXDATA_NEGEDGE) ? 1 : 0; + rk_mipi_dsi_write(regs, COLORM_ACTIVE_LOW, val); + + /* Set video mode */ + rk_mipi_dsi_write(regs, CMD_VIDEO_MODE, VIDEO_MODE); + + /* Set video mode transmission type as burst mode */ + rk_mipi_dsi_write(regs, VID_MODE_TYPE, BURST_MODE); + + /* Set pix num in a video package */ + rk_mipi_dsi_write(regs, VID_PKT_SIZE, 0x4b0); + + /* Set dpi color coding depth 24 bit */ + timing_node = fdt_subnode_offset(gd->fdt_blob, dev_of_offset(dev), + "display-timings"); + node = fdt_first_subnode(gd->fdt_blob, timing_node); + val = fdtdec_get_int(gd->fdt_blob, node, "bits-per-pixel", -1); + switch (val) { + case 16: + rk_mipi_dsi_write(regs, DPI_COLOR_CODING, DPI_16BIT_CFG_1); + break; + case 24: + rk_mipi_dsi_write(regs, DPI_COLOR_CODING, DPI_24BIT); + break; + case 30: + rk_mipi_dsi_write(regs, DPI_COLOR_CODING, DPI_30BIT); + break; + default: + rk_mipi_dsi_write(regs, DPI_COLOR_CODING, DPI_24BIT); + } + /* Enable low power mode */ + rk_mipi_dsi_write(regs, LP_CMD_EN, 1); + rk_mipi_dsi_write(regs, LP_HFP_EN, 1); + rk_mipi_dsi_write(regs, LP_VACT_EN, 1); + rk_mipi_dsi_write(regs, LP_VFP_EN, 1); + rk_mipi_dsi_write(regs, LP_VBP_EN, 1); + rk_mipi_dsi_write(regs, LP_VSA_EN, 1); + + /* Division for timeout counter clk */ + rk_mipi_dsi_write(regs, TO_CLK_DIVISION, 0x0a); + + /* Tx esc clk division from txbyte clk */ + rk_mipi_dsi_write(regs, TX_ESC_CLK_DIVISION, txbyte_clk/txesc_clk); + + /* Timeout count for hs<->lp transation between Line period */ + rk_mipi_dsi_write(regs, HSTX_TO_CNT, 0x3e8); + + /* Phy State transfer timing */ + rk_mipi_dsi_write(regs, PHY_STOP_WAIT_TIME, 32); + rk_mipi_dsi_write(regs, PHY_TXREQUESTCLKHS, 1); + rk_mipi_dsi_write(regs, PHY_HS2LP_TIME, 0x14); + rk_mipi_dsi_write(regs, PHY_LP2HS_TIME, 0x10); + rk_mipi_dsi_write(regs, MAX_RD_TIME, 0x2710); + + /* Power on */ + rk_mipi_dsi_write(regs, SHUTDOWNZ, 1); + + return 0; +} + +/* rk mipi dphy write function. It is used to write test data to dphy */ +static void rk_mipi_phy_write(u32 regs, unsigned char test_code, + unsigned char *test_data, unsigned char size) +{ + int i = 0; + + /* Write Test code */ + rk_mipi_dsi_write(regs, PHY_TESTCLK, 1); + rk_mipi_dsi_write(regs, PHY_TESTDIN, test_code); + rk_mipi_dsi_write(regs, PHY_TESTEN, 1); + rk_mipi_dsi_write(regs, PHY_TESTCLK, 0); + rk_mipi_dsi_write(regs, PHY_TESTEN, 0); + + /* Write Test data */ + for (i = 0; i < size; i++) { + rk_mipi_dsi_write(regs, PHY_TESTCLK, 0); + rk_mipi_dsi_write(regs, PHY_TESTDIN, test_data[i]); + rk_mipi_dsi_write(regs, PHY_TESTCLK, 1); + } +} + +/* + * Mipi dphy config function. Calculate the suitable prediv, feedback div, + * fsfreqrang value ,cap ,lpf and so on according to the given pix clk rate, + * and then enable phy. + */ +static int rk_mipi_phy_enable(struct udevice *dev) +{ + int i; + struct rk_mipi_priv *priv = dev_get_priv(dev); + u64 regs = (u64)priv->regs; + u64 fbdiv; + u64 prediv = 1; + u32 max_fbdiv = 512; + u32 max_prediv, min_prediv; + u64 ddr_clk = priv->phy_clk; + u32 refclk = priv->ref_clk; + u32 remain = refclk; + unsigned char test_data[2] = {0}; + + int freq_rang[][2] = { + {90, 0x01}, {100, 0x10}, {110, 0x20}, {130, 0x01}, + {140, 0x11}, {150, 0x21}, {170, 0x02}, {180, 0x12}, + {200, 0x22}, {220, 0x03}, {240, 0x13}, {250, 0x23}, + {270, 0x04}, {300, 0x14}, {330, 0x05}, {360, 0x15}, + {400, 0x25}, {450, 0x06}, {500, 0x16}, {550, 0x07}, + {600, 0x17}, {650, 0x08}, {700, 0x18}, {750, 0x09}, + {800, 0x19}, {850, 0x29}, {900, 0x39}, {950, 0x0a}, + {1000, 0x1a}, {1050, 0x2a}, {1100, 0x3a}, {1150, 0x0b}, + {1200, 0x1b}, {1250, 0x2b}, {1300, 0x3b}, {1350, 0x0c}, + {1400, 0x1c}, {1450, 0x2c}, {1500, 0x3c} + }; + + /* Shutdown mode */ + rk_mipi_dsi_write(regs, PHY_SHUTDOWNZ, 0); + rk_mipi_dsi_write(regs, PHY_RSTZ, 0); + rk_mipi_dsi_write(regs, PHY_TESTCLR, 1); + + /* Pll locking */ + rk_mipi_dsi_write(regs, PHY_TESTCLR, 0); + + /* config cp and lfp */ + test_data[0] = 0x80 | (ddr_clk / (200 * MHz)) << 3 | 0x3; + rk_mipi_phy_write(regs, CODE_PLL_VCORANGE_VCOCAP, test_data, 1); + + test_data[0] = 0x8; + rk_mipi_phy_write(regs, CODE_PLL_CPCTRL, test_data, 1); + + test_data[0] = 0x80 | 0x40; + rk_mipi_phy_write(regs, CODE_PLL_LPF_CP, test_data, 1); + + /* select the suitable value for fsfreqrang reg */ + for (i = 0; i < ARRAY_SIZE(freq_rang); i++) { + if (ddr_clk / (MHz) >= freq_rang[i][0]) + break; + } + if (i == ARRAY_SIZE(freq_rang)) { + debug("%s: Dphy freq out of range!\n", __func__); + return -EINVAL; + } + test_data[0] = freq_rang[i][1] << 1; + rk_mipi_phy_write(regs, CODE_HS_RX_LANE0, test_data, 1); + + /* + * Calculate the best ddrclk and it's corresponding div value. If the + * given pixelclock is great than 250M, ddrclk will be fix 1500M. + * Otherwise, + * it's equal to ddr_clk= pixclk * 6. 40MHz >= refclk / prediv >= 5MHz + * according to spec. + */ + max_prediv = (refclk / (5 * MHz)); + min_prediv = ((refclk / (40 * MHz)) ? (refclk / (40 * MHz) + 1) : 1); + + debug("%s: DEBUG: max_prediv=%u, min_prediv=%u\n", __func__, max_prediv, + min_prediv); + + if (max_prediv < min_prediv) { + debug("%s: Invalid refclk value\n", __func__); + return -EINVAL; + } + + /* Calculate the best refclk and feedback division value for dphy pll */ + for (i = min_prediv; i < max_prediv; i++) { + if ((ddr_clk * i % refclk < remain) && + (ddr_clk * i / refclk) < max_fbdiv) { + prediv = i; + remain = ddr_clk * i % refclk; + } + } + fbdiv = ddr_clk * prediv / refclk; + ddr_clk = refclk * fbdiv / prediv; + priv->phy_clk = ddr_clk; + + debug("%s: DEBUG: refclk=%u, refclk=%llu, fbdiv=%llu, phyclk=%llu\n", + __func__, refclk, prediv, fbdiv, ddr_clk); + + /* config prediv and feedback reg */ + test_data[0] = prediv - 1; + rk_mipi_phy_write(regs, CODE_PLL_INPUT_DIV_RAT, test_data, 1); + test_data[0] = (fbdiv - 1) & 0x1f; + rk_mipi_phy_write(regs, CODE_PLL_LOOP_DIV_RAT, test_data, 1); + test_data[0] = (fbdiv - 1) >> 5 | 0x80; + rk_mipi_phy_write(regs, CODE_PLL_LOOP_DIV_RAT, test_data, 1); + test_data[0] = 0x30; + rk_mipi_phy_write(regs, CODE_PLL_INPUT_LOOP_DIV_RAT, test_data, 1); + + /* rest config */ + test_data[0] = 0x4d; + rk_mipi_phy_write(regs, CODE_BANDGAP_BIAS_CTRL, test_data, 1); + + test_data[0] = 0x3d; + rk_mipi_phy_write(regs, CODE_TERMINATION_CTRL, test_data, 1); + + test_data[0] = 0xdf; + rk_mipi_phy_write(regs, CODE_TERMINATION_CTRL, test_data, 1); + + test_data[0] = 0x7; + rk_mipi_phy_write(regs, CODE_AFE_BIAS_BANDGAP_ANOLOG, test_data, 1); + + test_data[0] = 0x80 | 0x7; + rk_mipi_phy_write(regs, CODE_AFE_BIAS_BANDGAP_ANOLOG, test_data, 1); + + test_data[0] = 0x80 | 15; + rk_mipi_phy_write(regs, CODE_HSTXDATALANEREQUSETSTATETIME, + test_data, 1); + test_data[0] = 0x80 | 85; + rk_mipi_phy_write(regs, CODE_HSTXDATALANEPREPARESTATETIME, + test_data, 1); + test_data[0] = 0x40 | 10; + rk_mipi_phy_write(regs, CODE_HSTXDATALANEHSZEROSTATETIME, + test_data, 1); + + /* enter into stop mode */ + rk_mipi_dsi_write(regs, N_LANES, 0x03); + rk_mipi_dsi_write(regs, PHY_ENABLECLK, 1); + rk_mipi_dsi_write(regs, PHY_FORCEPLL, 1); + rk_mipi_dsi_write(regs, PHY_SHUTDOWNZ, 1); + rk_mipi_dsi_write(regs, PHY_RSTZ, 1); + + return 0; +} + +/* + * This function is called by rk_display_init() using rk_mipi_dsi_enable() and + * rk_mipi_phy_enable() to initialize mipi controller and dphy. If success, + * enable backlight. + */ +static int rk_display_enable(struct udevice *dev, int panel_bpp, + const struct display_timing *timing) +{ + int ret; + struct rk_mipi_priv *priv = dev_get_priv(dev); + + /* Fill the mipi controller parameter */ + priv->ref_clk = 24 * MHz; + priv->sys_clk = priv->ref_clk; + priv->pix_clk = timing->pixelclock.typ; + priv->phy_clk = priv->pix_clk * 6; + priv->txbyte_clk = priv->phy_clk / 8; + priv->txesc_clk = 20 * MHz; + + /* Config and enable mipi dsi according to timing */ + ret = rk_mipi_dsi_enable(dev, timing); + if (ret) { + debug("%s: rk_mipi_dsi_enable() failed (err=%d)\n", + __func__, ret); + return ret; + } + + /* Config and enable mipi phy */ + ret = rk_mipi_phy_enable(dev); + if (ret) { + debug("%s: rk_mipi_phy_enable() failed (err=%d)\n", + __func__, ret); + return ret; + } + + /* Enable backlight */ + ret = panel_enable_backlight(priv->panel); + if (ret) { + debug("%s: panel_enable_backlight() failed (err=%d)\n", + __func__, ret); + return ret; + } + + return 0; +} + +static int rk_mipi_ofdata_to_platdata(struct udevice *dev) +{ + struct rk_mipi_priv *priv = dev_get_priv(dev); + + priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF); + if (priv->grf <= 0) { + debug("%s: Get syscon grf failed (ret=%llu)\n", + __func__, (u64)priv->grf); + return -ENXIO; + } + priv->regs = (void *)dev_get_addr(dev); + if (priv->regs <= 0) { + debug("%s: Get MIPI dsi address failed (ret=%llu)\n", __func__, + (u64)priv->regs); + return -ENXIO; + } + + return 0; +} + +/* + * Probe function: check panel existence and readingit's timing. Then config + * mipi dsi controller and enable it according to the timing parameter. + */ +static int rk_mipi_probe(struct udevice *dev) +{ + int ret; + struct rk_mipi_priv *priv = dev_get_priv(dev); + + ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel", + &priv->panel); + if (ret) { + debug("%s: Can not find panel (err=%d)\n", __func__, ret); + return ret; + } + + return 0; +} + +static const struct dm_display_ops rk_mipi_dsi_ops = { + .read_timing = rk_mipi_read_timing, + .enable = rk_display_enable, +}; + +static const struct udevice_id rk_mipi_dsi_ids[] = { + { .compatible = "rockchip,rk3399_mipi_dsi" }, + { } +}; + +U_BOOT_DRIVER(rk_mipi_dsi) = { + .name = "rk_mipi_dsi", + .id = UCLASS_DISPLAY, + .of_match = rk_mipi_dsi_ids, + .ofdata_to_platdata = rk_mipi_ofdata_to_platdata, + .probe = rk_mipi_probe, + .ops = &rk_mipi_dsi_ops, + .priv_auto_alloc_size = sizeof(struct rk_mipi_priv), +};