Add rk3288 soc specific driver for mipi dsi.
Signed-off-by: Eric Gao eric.gao@rock-chips.com
---
drivers/video/rockchip/rk3288_mipi.c | 191 +++++++++++++++++++++++++++++++++++ 1 file changed, 191 insertions(+) create mode 100644 drivers/video/rockchip/rk3288_mipi.c
diff --git a/drivers/video/rockchip/rk3288_mipi.c b/drivers/video/rockchip/rk3288_mipi.c new file mode 100644 index 0000000..34f2aef --- /dev/null +++ b/drivers/video/rockchip/rk3288_mipi.c @@ -0,0 +1,191 @@ +/* + * 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 "rk_mipi.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_rk3288.h> +#include <asm/arch/grf_rk3288.h> +#include <asm/arch/rockchip_mipi_dsi.h> + +DECLARE_GLOBAL_DATA_PTR; + +#define MHz 1000000 + +/* Select mipi dsi source, big or little vop */ +static int rk_mipi_dsi_source_select(struct udevice *dev) +{ + struct rk_mipi_priv *priv = dev_get_priv(dev); + struct rk3288_grf *grf = priv->grf; + struct display_plat *disp_uc_plat = dev_get_uclass_platdata(dev); + + /* Select the video source */ + switch (disp_uc_plat->source_id) { + case VOP_B: + rk_clrsetreg(&grf->soc_con6, RK3288_DSI0_LCDC_SEL_MASK, + RK3288_DSI0_LCDC_SEL_BIG + << RK3288_DSI0_LCDC_SEL_SHIFT); + break; + case VOP_L: + rk_clrsetreg(&grf->soc_con6, RK3288_DSI0_LCDC_SEL_MASK, + RK3288_DSI0_LCDC_SEL_LIT + << RK3288_DSI0_LCDC_SEL_SHIFT); + break; + default: + debug("%s: Invalid VOP id\n", __func__); + return -EINVAL; + } + + return 0; +} + +/* Setup mipi dphy working mode */ +static void rk_mipi_dphy_mode_set(struct udevice *dev) +{ + struct rk_mipi_priv *priv = dev_get_priv(dev); + struct rk3288_grf *grf = priv->grf; + int val; + + /* Set Controller as TX mode */ + val = RK3288_DPHY_TX0_RXMODE_DIS << RK3288_DPHY_TX0_RXMODE_SHIFT; + rk_clrsetreg(&grf->soc_con8, RK3288_DPHY_TX0_RXMODE_MASK, val); + + /* Exit tx stop mode */ + val |= RK3288_DPHY_TX0_TXSTOPMODE_EN + << RK3288_DPHY_TX0_TXSTOPMODE_SHIFT; + rk_clrsetreg(&grf->soc_con8, + RK3288_DPHY_TX0_TXSTOPMODE_MASK, val); + + /* Disable turnequest */ + val |= RK3288_DPHY_TX0_TURNREQUEST_EN + << RK3288_DPHY_TX0_TURNREQUEST_SHIFT; + rk_clrsetreg(&grf->soc_con8, + RK3288_DPHY_TX0_TURNREQUEST_MASK, val); +} + +/* + * 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; + + /* Select vop port, big or little */ + rk_mipi_dsi_source_select(dev); + + /* Set mipi dphy work mode */ + rk_mipi_dphy_mode_set(dev); + + /* 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=%p)\n", + __func__, priv->grf); + return -ENXIO; + } + priv->regs = (void *)devfdt_get_addr(dev); + if (priv->regs <= 0) { + debug("%s: Get MIPI dsi address failed (ret=%p)\n", __func__, + 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,rk3288_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), +};