[U-Boot] [PATCH v3 3/6] rockchip: video: Add a display driver for rockchip LVDS
Jacob Chen
jacob-chen at iotwrt.com
Mon Mar 14 04:20:16 CET 2016
Some Rockchip SoCs support LVDS output. Add a display driver for this so
that these displays can be used on supported boards.
Signed-off-by: Jacob Chen <jacob-chen at iotwrt.com>
---
Changes in v3:
- Use fdtdec_get_int instead fdtdec_get_uint in rk_lvds_ofdata_to_platdata
Changes in v2:
- Add comments to struct rk_lvds_priv
- Drop useless 0x0 prefix in header
- Include bingding file in source file
arch/arm/include/asm/arch-rockchip/lvds_rk3288.h | 97 +++++++++
drivers/video/rockchip/Makefile | 2 +-
drivers/video/rockchip/rk_lvds.c | 254 +++++++++++++++++++++++
3 files changed, 352 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/include/asm/arch-rockchip/lvds_rk3288.h
create mode 100644 drivers/video/rockchip/rk_lvds.c
diff --git a/arch/arm/include/asm/arch-rockchip/lvds_rk3288.h b/arch/arm/include/asm/arch-rockchip/lvds_rk3288.h
new file mode 100644
index 0000000..121a898
--- /dev/null
+++ b/arch/arm/include/asm/arch-rockchip/lvds_rk3288.h
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2016 Rockchip Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#ifndef _ASM_ARCH_LVDS_RK3288_H
+#define _ASM_ARCH_LVDS_RK3288_H
+
+#define RK3288_LVDS_CH0_REG0 0x00
+#define RK3288_LVDS_CH0_REG0_LVDS_EN BIT(7)
+#define RK3288_LVDS_CH0_REG0_TTL_EN BIT(6)
+#define RK3288_LVDS_CH0_REG0_LANECK_EN BIT(5)
+#define RK3288_LVDS_CH0_REG0_LANE4_EN BIT(4)
+#define RK3288_LVDS_CH0_REG0_LANE3_EN BIT(3)
+#define RK3288_LVDS_CH0_REG0_LANE2_EN BIT(2)
+#define RK3288_LVDS_CH0_REG0_LANE1_EN BIT(1)
+#define RK3288_LVDS_CH0_REG0_LANE0_EN BIT(0)
+
+#define RK3288_LVDS_CH0_REG1 0x04
+#define RK3288_LVDS_CH0_REG1_LANECK_BIAS BIT(5)
+#define RK3288_LVDS_CH0_REG1_LANE4_BIAS BIT(4)
+#define RK3288_LVDS_CH0_REG1_LANE3_BIAS BIT(3)
+#define RK3288_LVDS_CH0_REG1_LANE2_BIAS BIT(2)
+#define RK3288_LVDS_CH0_REG1_LANE1_BIAS BIT(1)
+#define RK3288_LVDS_CH0_REG1_LANE0_BIAS BIT(0)
+
+#define RK3288_LVDS_CH0_REG2 0x08
+#define RK3288_LVDS_CH0_REG2_RESERVE_ON BIT(7)
+#define RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE BIT(6)
+#define RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE BIT(5)
+#define RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE BIT(4)
+#define RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE BIT(3)
+#define RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE BIT(2)
+#define RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE BIT(1)
+#define RK3288_LVDS_CH0_REG2_PLL_FBDIV8 BIT(0)
+
+#define RK3288_LVDS_CH0_REG3 0x0c
+#define RK3288_LVDS_CH0_REG3_PLL_FBDIV_MASK 0xff
+
+#define RK3288_LVDS_CH0_REG4 0x10
+#define RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE BIT(5)
+#define RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE BIT(4)
+#define RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE BIT(3)
+#define RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE BIT(2)
+#define RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE BIT(1)
+#define RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE BIT(0)
+
+#define RK3288_LVDS_CH0_REG5 0x14
+#define RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA BIT(5)
+#define RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA BIT(4)
+#define RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA BIT(3)
+#define RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA BIT(2)
+#define RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA BIT(1)
+#define RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA BIT(0)
+
+#define RK3288_LVDS_CFG_REGC 0x30
+#define RK3288_LVDS_CFG_REGC_PLL_ENABLE 0x00
+#define RK3288_LVDS_CFG_REGC_PLL_DISABLE 0xff
+
+#define RK3288_LVDS_CH0_REGD 0x34
+#define RK3288_LVDS_CH0_REGD_PLL_PREDIV_MASK 0x1f
+
+#define RK3288_LVDS_CH0_REG20 0x80
+#define RK3288_LVDS_CH0_REG20_MSB 0x45
+#define RK3288_LVDS_CH0_REG20_LSB 0x44
+
+#define RK3288_LVDS_CFG_REG21 0x84
+#define RK3288_LVDS_CFG_REG21_TX_ENABLE 0x92
+#define RK3288_LVDS_CFG_REG21_TX_DISABLE 0x00
+
+/* fbdiv value is split over 2 registers, with bit8 in reg2 */
+#define RK3288_LVDS_PLL_FBDIV_REG2(_fbd) \
+ (_fbd & BIT(8) ? RK3288_LVDS_CH0_REG2_PLL_FBDIV8 : 0)
+#define RK3288_LVDS_PLL_FBDIV_REG3(_fbd) \
+ (_fbd & RK3288_LVDS_CH0_REG3_PLL_FBDIV_MASK)
+#define RK3288_LVDS_PLL_PREDIV_REGD(_pd) \
+ (_pd & RK3288_LVDS_CH0_REGD_PLL_PREDIV_MASK)
+
+#define RK3288_LVDS_SOC_CON6_SEL_VOP_LIT BIT(3)
+
+#define LVDS_FMT_MASK (7 << 16)
+#define LVDS_MSB (1 << 3)
+#define LVDS_DUAL (1 << 4)
+#define LVDS_FMT_1 (1 << 5)
+#define LVDS_TTL_EN (1 << 6)
+#define LVDS_START_PHASE_RST_1 (1 << 7)
+#define LVDS_DCLK_INV (1 << 8)
+#define LVDS_CH0_EN (1 << 11)
+#define LVDS_CH1_EN (1 << 12)
+#define LVDS_PWRDN (1 << 15)
+
+#define LVDS_24BIT (0 << 1)
+#define LVDS_18BIT (1 << 1)
+
+
+#endif
diff --git a/drivers/video/rockchip/Makefile b/drivers/video/rockchip/Makefile
index 0e9a8ac..7962f86 100644
--- a/drivers/video/rockchip/Makefile
+++ b/drivers/video/rockchip/Makefile
@@ -5,4 +5,4 @@
# SPDX-License-Identifier: GPL-2.0+
#
-obj-y += rk_edp.o rk_hdmi.o rk_vop.o
+obj-y += rk_edp.o rk_hdmi.o rk_vop.o rk_lvds.o
diff --git a/drivers/video/rockchip/rk_lvds.c b/drivers/video/rockchip/rk_lvds.c
new file mode 100644
index 0000000..dc10b86
--- /dev/null
+++ b/drivers/video/rockchip/rk_lvds.c
@@ -0,0 +1,254 @@
+/*
+ * Copyright 2016 Rockchip Inc.
+ *
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+#include <common.h>
+#include <clk.h>
+#include <display.h>
+#include <dm.h>
+#include <edid.h>
+#include <panel.h>
+#include <regmap.h>
+#include <syscon.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/lvds_rk3288.h>
+#include <asm/arch/grf_rk3288.h>
+#include <dt-bindings/clock/rk3288-cru.h>
+#include <dt-bindings/video/rk3288.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/**
+ * struct rk_lvds_priv - private rockchip lvds display driver info
+ *
+ * @reg: LVDS register address
+ * @grf: GRF register
+ * @panel: Panel device that is used in driver
+ *
+ * @output: Output mode, decided single or double channel,
+ * LVDS or LVTLL
+ * @format: Data format that RGB data will packing as
+ */
+struct rk_lvds_priv {
+ void __iomem *regs;
+ struct rk3288_grf *grf;
+ struct udevice *panel;
+
+ int output;
+ int format;
+};
+
+static inline void lvds_writel(struct rk_lvds_priv *lvds, u32 offset, u32 val)
+{
+ writel(val, lvds->regs + offset);
+
+ writel(val, lvds->regs + offset + 0x100);
+}
+
+int rk_lvds_enable(struct udevice *dev, int panel_bpp,
+ const struct display_timing *edid)
+{
+ struct rk_lvds_priv *priv = dev_get_priv(dev);
+ struct display_plat *uc_plat = dev_get_uclass_platdata(dev);
+ int ret = 0;
+ unsigned int val = 0;
+
+ ret = panel_enable_backlight(priv->panel);
+ if (ret) {
+ debug("%s: backlight error: %d\n", __func__, ret);
+ return ret;
+ }
+
+ /* Select the video source */
+ if (uc_plat->source_id)
+ val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT |
+ (RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16);
+ else
+ val = RK3288_LVDS_SOC_CON6_SEL_VOP_LIT << 16;
+ rk_setreg(&priv->grf->soc_con6, val);
+
+ /* Select data transfer format */
+ val = priv->format;
+ if (priv->output == LVDS_OUTPUT_DUAL)
+ val |= LVDS_DUAL | LVDS_CH0_EN | LVDS_CH1_EN;
+ else if (priv->output == LVDS_OUTPUT_SINGLE)
+ val |= LVDS_CH0_EN;
+ else if (priv->output == LVDS_OUTPUT_RGB)
+ val |= LVDS_TTL_EN | LVDS_CH0_EN | LVDS_CH1_EN;
+ val |= (0xffff << 16);
+ rk_setreg(&priv->grf->soc_con7, val);
+
+ /* Enable LVDS PHY */
+ if (priv->output == LVDS_OUTPUT_RGB) {
+ lvds_writel(priv, RK3288_LVDS_CH0_REG0,
+ RK3288_LVDS_CH0_REG0_TTL_EN |
+ RK3288_LVDS_CH0_REG0_LANECK_EN |
+ RK3288_LVDS_CH0_REG0_LANE4_EN |
+ RK3288_LVDS_CH0_REG0_LANE3_EN |
+ RK3288_LVDS_CH0_REG0_LANE2_EN |
+ RK3288_LVDS_CH0_REG0_LANE1_EN |
+ RK3288_LVDS_CH0_REG0_LANE0_EN);
+ lvds_writel(priv, RK3288_LVDS_CH0_REG2,
+ RK3288_LVDS_PLL_FBDIV_REG2(0x46));
+
+ lvds_writel(priv, RK3288_LVDS_CH0_REG3,
+ RK3288_LVDS_PLL_FBDIV_REG3(0x46));
+ lvds_writel(priv, RK3288_LVDS_CH0_REG4,
+ RK3288_LVDS_CH0_REG4_LANECK_TTL_MODE |
+ RK3288_LVDS_CH0_REG4_LANE4_TTL_MODE |
+ RK3288_LVDS_CH0_REG4_LANE3_TTL_MODE |
+ RK3288_LVDS_CH0_REG4_LANE2_TTL_MODE |
+ RK3288_LVDS_CH0_REG4_LANE1_TTL_MODE |
+ RK3288_LVDS_CH0_REG4_LANE0_TTL_MODE);
+ lvds_writel(priv, RK3288_LVDS_CH0_REG5,
+ RK3288_LVDS_CH0_REG5_LANECK_TTL_DATA |
+ RK3288_LVDS_CH0_REG5_LANE4_TTL_DATA |
+ RK3288_LVDS_CH0_REG5_LANE3_TTL_DATA |
+ RK3288_LVDS_CH0_REG5_LANE2_TTL_DATA |
+ RK3288_LVDS_CH0_REG5_LANE1_TTL_DATA |
+ RK3288_LVDS_CH0_REG5_LANE0_TTL_DATA);
+ lvds_writel(priv, RK3288_LVDS_CH0_REGD,
+ RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
+ lvds_writel(priv, RK3288_LVDS_CH0_REG20,
+ RK3288_LVDS_CH0_REG20_LSB);
+ } else {
+ lvds_writel(priv, RK3288_LVDS_CH0_REG0,
+ RK3288_LVDS_CH0_REG0_LVDS_EN |
+ RK3288_LVDS_CH0_REG0_LANECK_EN |
+ RK3288_LVDS_CH0_REG0_LANE4_EN |
+ RK3288_LVDS_CH0_REG0_LANE3_EN |
+ RK3288_LVDS_CH0_REG0_LANE2_EN |
+ RK3288_LVDS_CH0_REG0_LANE1_EN |
+ RK3288_LVDS_CH0_REG0_LANE0_EN);
+ lvds_writel(priv, RK3288_LVDS_CH0_REG1,
+ RK3288_LVDS_CH0_REG1_LANECK_BIAS |
+ RK3288_LVDS_CH0_REG1_LANE4_BIAS |
+ RK3288_LVDS_CH0_REG1_LANE3_BIAS |
+ RK3288_LVDS_CH0_REG1_LANE2_BIAS |
+ RK3288_LVDS_CH0_REG1_LANE1_BIAS |
+ RK3288_LVDS_CH0_REG1_LANE0_BIAS);
+ lvds_writel(priv, RK3288_LVDS_CH0_REG2,
+ RK3288_LVDS_CH0_REG2_RESERVE_ON |
+ RK3288_LVDS_CH0_REG2_LANECK_LVDS_MODE |
+ RK3288_LVDS_CH0_REG2_LANE4_LVDS_MODE |
+ RK3288_LVDS_CH0_REG2_LANE3_LVDS_MODE |
+ RK3288_LVDS_CH0_REG2_LANE2_LVDS_MODE |
+ RK3288_LVDS_CH0_REG2_LANE1_LVDS_MODE |
+ RK3288_LVDS_CH0_REG2_LANE0_LVDS_MODE |
+ RK3288_LVDS_PLL_FBDIV_REG2(0x46));
+ lvds_writel(priv, RK3288_LVDS_CH0_REG3,
+ RK3288_LVDS_PLL_FBDIV_REG3(0x46));
+ lvds_writel(priv, RK3288_LVDS_CH0_REG4, 0x00);
+ lvds_writel(priv, RK3288_LVDS_CH0_REG5, 0x00);
+ lvds_writel(priv, RK3288_LVDS_CH0_REGD,
+ RK3288_LVDS_PLL_PREDIV_REGD(0x0a));
+ lvds_writel(priv, RK3288_LVDS_CH0_REG20,
+ RK3288_LVDS_CH0_REG20_LSB);
+ }
+
+ /* Power on */
+ writel(RK3288_LVDS_CFG_REGC_PLL_ENABLE,
+ priv->regs + RK3288_LVDS_CFG_REGC);
+
+ writel(RK3288_LVDS_CFG_REG21_TX_ENABLE,
+ priv->regs + RK3288_LVDS_CFG_REG21);
+
+ return 0;
+}
+
+int rk_lvds_read_timing(struct udevice *dev, struct display_timing *timing)
+{
+ if (fdtdec_decode_display_timing
+ (gd->fdt_blob, dev->of_offset, 0, timing)) {
+ debug("%s: Failed to decode display timing\n", __func__);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int rk_lvds_ofdata_to_platdata(struct udevice *dev)
+{
+ struct rk_lvds_priv *priv = dev_get_priv(dev);
+ const void *blob = gd->fdt_blob;
+ int node = dev->of_offset;
+ int ret;
+ priv->regs = (void *)dev_get_addr(dev);
+ priv->grf = syscon_get_first_range(ROCKCHIP_SYSCON_GRF);
+
+ ret = fdtdec_get_int(blob, node, "rockchip,output", -1);
+ if (ret != -1) {
+ priv->output = ret;
+ debug("LVDS output : %d\n", ret);
+ } else {
+ /* default set it as output rgb */
+ priv->output = LVDS_OUTPUT_RGB;
+ }
+
+ ret = fdtdec_get_int(blob, node, "rockchip,data-mapping", -1);
+ if (ret != -1) {
+ priv->format = ret;
+ debug("LVDS data-mapping : %d\n", ret);
+ } else {
+ /* default set it as format jeida */
+ priv->format = LVDS_FORMAT_JEIDA;
+ }
+
+ ret = fdtdec_get_int(blob, node, "rockchip,data-width", -1);
+ if (ret != -1) {
+ debug("LVDS data-width : %d\n", ret);
+ if (ret == 24) {
+ priv->format |= LVDS_24BIT;
+ } else if (ret == 18) {
+ priv->format |= LVDS_18BIT;
+ } else {
+ debug("rockchip-lvds unsupport data-width[%d]\n", ret);
+ ret = -EINVAL;
+ return ret;
+ }
+ } else {
+ priv->format |= LVDS_24BIT;
+ }
+
+ return 0;
+}
+
+int rk_lvds_probe(struct udevice *dev)
+{
+ struct rk_lvds_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev, "rockchip,panel",
+ &priv->panel);
+ if (ret) {
+ debug("%s: Cannot find panel for '%s' (ret=%d)\n", __func__,
+ dev->name, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static const struct dm_display_ops lvds_rockchip_ops = {
+ .read_timing = rk_lvds_read_timing,
+ .enable = rk_lvds_enable,
+};
+
+static const struct udevice_id rockchip_lvds_ids[] = {
+ {.compatible = "rockchip,rk3288-lvds"},
+ {}
+};
+
+U_BOOT_DRIVER(lvds_rockchip) = {
+ .name = "lvds_rockchip",
+ .id = UCLASS_DISPLAY,
+ .of_match = rockchip_lvds_ids,
+ .ops = &lvds_rockchip_ops,
+ .ofdata_to_platdata = rk_lvds_ofdata_to_platdata,
+ .probe = rk_lvds_probe,
+ .priv_auto_alloc_size = sizeof(struct rk_lvds_priv),
+};
--
1.9.1
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