[PATCH] drm/msm: Initial add DSI connector support (v2)

This change adds the DSI connector support in msm drm driver.

v1: Initial change v2: Address comments from Archit + minor clean-ups

Signed-off-by: Hai Li hali@codeaurora.org --- drivers/gpu/drm/msm/Kconfig | 11 + drivers/gpu/drm/msm/Makefile | 4 + drivers/gpu/drm/msm/dsi/dsi.c | 214 ++++ drivers/gpu/drm/msm/dsi/dsi.h | 118 ++ drivers/gpu/drm/msm/dsi/dsi_host.c | 1992 +++++++++++++++++++++++++++++++++ drivers/gpu/drm/msm/dsi/dsi_manager.c | 699 ++++++++++++ drivers/gpu/drm/msm/dsi/dsi_phy.c | 352 ++++++ drivers/gpu/drm/msm/msm_drv.h | 20 + 8 files changed, 3410 insertions(+) create mode 100644 drivers/gpu/drm/msm/dsi/dsi.c create mode 100644 drivers/gpu/drm/msm/dsi/dsi.h create mode 100644 drivers/gpu/drm/msm/dsi/dsi_host.c create mode 100644 drivers/gpu/drm/msm/dsi/dsi_manager.c create mode 100644 drivers/gpu/drm/msm/dsi/dsi_phy.c

diff --git a/drivers/gpu/drm/msm/Kconfig b/drivers/gpu/drm/msm/Kconfig index 1e6a907..5ba5631 100644 --- a/drivers/gpu/drm/msm/Kconfig +++ b/drivers/gpu/drm/msm/Kconfig @@ -35,3 +35,14 @@ config DRM_MSM_REGISTER_LOGGING Compile in support for logging register reads/writes in a format that can be parsed by envytools demsm tool. If enabled, register logging can be switched on via msm.reglog=y module param. + +config DRM_MSM_DSI + bool "Enable DSI support in MSM DRM driver" + depends on DRM_MSM + select DRM_PANEL + select DRM_MIPI_DSI + default y + help + Choose this option if you have a need for MIPI DSI connector + support. + diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 674a132..5c144cc 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -50,5 +50,9 @@ msm-y := \

msm-$(CONFIG_DRM_MSM_FBDEV) += msm_fbdev.o msm-$(CONFIG_COMMON_CLK) += mdp/mdp4/mdp4_lvds_pll.o +msm-$(CONFIG_DRM_MSM_DSI) += dsi/dsi.o \ + dsi/dsi_host.o \ + dsi/dsi_manager.o \ + dsi/dsi_phy.o

obj-$(CONFIG_DRM_MSM) += msm.o diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c new file mode 100644 index 0000000..1125264 --- /dev/null +++ b/drivers/gpu/drm/msm/dsi/dsi.c @@ -0,0 +1,214 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include "dsi.h" + +struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi) +{ + if (!msm_dsi || !msm_dsi->panel) + return NULL; + + return (msm_dsi->panel_flags & MIPI_DSI_MODE_VIDEO) ? + msm_dsi->base.encoders[MSM_DSI_VIDEO_ENCODER_ID] : + msm_dsi->base.encoders[MSM_DSI_CMD_ENCODER_ID]; +} + +static int dsi_modeset_init(struct msm_drm_sub_dev *base, + struct drm_device *dev) +{ + struct msm_dsi *msm_dsi = container_of(base, struct msm_dsi, base); + struct msm_drm_private *priv = dev->dev_private; + int ret, i; + + if (WARN_ON((base->num_encoders != MSM_DSI_ENCODER_NUM) || + !base->encoders[MSM_DSI_VIDEO_ENCODER_ID] || + !base->encoders[MSM_DSI_CMD_ENCODER_ID])) + return -EINVAL; + + msm_dsi->dev = dev; + + ret = msm_dsi_host_modeset_init(msm_dsi->host, dev); + if (ret) { + dev_err(dev->dev, "failed to modeset init host: %d\n", ret); + goto fail; + } + + msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id); + if (IS_ERR(msm_dsi->bridge)) { + ret = PTR_ERR(msm_dsi->bridge); + dev_err(dev->dev, "failed to create dsi bridge: %d\n", ret); + msm_dsi->bridge = NULL; + goto fail; + } + + msm_dsi->connector = msm_dsi_manager_connector_init(msm_dsi->id); + if (IS_ERR(msm_dsi->connector)) { + ret = PTR_ERR(msm_dsi->connector); + dev_err(dev->dev, "failed to create dsi connector: %d\n", ret); + msm_dsi->connector = NULL; + goto fail; + } + + for (i = 0; i < base->num_encoders; i++) + base->encoders[i]->bridge = msm_dsi->bridge; + + priv->bridges[priv->num_bridges++] = msm_dsi->bridge; + priv->connectors[priv->num_connectors++] = msm_dsi->connector; + + return 0; +fail: + if (msm_dsi) { + /* bridge/connector are normally destroyed by drm: */ + if (msm_dsi->bridge) { + msm_dsi_manager_bridge_destroy(msm_dsi->bridge); + msm_dsi->bridge = NULL; + } + if (msm_dsi->connector) { + msm_dsi->connector->funcs->destroy(msm_dsi->connector); + msm_dsi->connector = NULL; + } + } + + return ret; +} + +static void dsi_destroy(struct msm_dsi *msm_dsi) +{ + if (!msm_dsi) + return; + + msm_dsi_manager_unregister(msm_dsi); + if (msm_dsi->host) { + msm_dsi_host_destroy(msm_dsi->host); + msm_dsi->host = NULL; + } + + platform_set_drvdata(msm_dsi->pdev, NULL); +} + +static struct msm_dsi *dsi_init(struct platform_device *pdev) +{ + struct msm_dsi *msm_dsi = NULL; + int ret; + + if (!pdev) { + dev_err(&pdev->dev, "no dsi device\n"); + ret = -ENXIO; + goto fail; + } + + msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL); + if (!msm_dsi) { + ret = -ENOMEM; + goto fail; + } + DBG("dsi probed=%p", msm_dsi); + + msm_dsi->pdev = pdev; + platform_set_drvdata(pdev, msm_dsi); + + /* Init dsi host */ + ret = msm_dsi_host_init(msm_dsi); + if (ret) + goto fail; + + /* Register to dsi manager */ + ret = msm_dsi_manager_register(msm_dsi); + if (ret) + goto fail; + + msm_dsi->base.modeset_init = dsi_modeset_init; + + return msm_dsi; + +fail: + if (msm_dsi) + dsi_destroy(msm_dsi); + + return ERR_PTR(ret); +} + +static int dsi_bind(struct device *dev, struct device *master, void *data) +{ + struct drm_device *drm = dev_get_drvdata(master); + struct msm_drm_private *priv = drm->dev_private; + struct platform_device *pdev = to_platform_device(dev); + struct msm_dsi *msm_dsi; + + DBG(""); + msm_dsi = dsi_init(pdev); + if (IS_ERR(msm_dsi)) + return PTR_ERR(msm_dsi); + + priv->dsi[msm_dsi->id] = &msm_dsi->base; + + return 0; +} + +static void dsi_unbind(struct device *dev, struct device *master, + void *data) +{ + struct drm_device *drm = dev_get_drvdata(master); + struct msm_drm_private *priv = drm->dev_private; + struct msm_dsi *msm_dsi = dev_get_drvdata(dev); + int id = msm_dsi->id; + + if (priv->dsi[id]) { + dsi_destroy(msm_dsi); + priv->dsi[id] = NULL; + } +} + +static const struct component_ops dsi_ops = { + .bind = dsi_bind, + .unbind = dsi_unbind, +}; + +static int dsi_dev_probe(struct platform_device *pdev) +{ + return component_add(&pdev->dev, &dsi_ops); +} + +static int dsi_dev_remove(struct platform_device *pdev) +{ + DBG(""); + component_del(&pdev->dev, &dsi_ops); + return 0; +} + +static const struct of_device_id dt_match[] = { + { .compatible = "qcom,mdss-dsi-ctrl" }, + {} +}; + +static struct platform_driver dsi_driver = { + .probe = dsi_dev_probe, + .remove = dsi_dev_remove, + .driver = { + .name = "msm_dsi", + .of_match_table = dt_match, + }, +}; + +void __init msm_dsi_register(void) +{ + DBG(""); + platform_driver_register(&dsi_driver); +} + +void __exit msm_dsi_unregister(void) +{ + DBG(""); + platform_driver_unregister(&dsi_driver); +} + diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h new file mode 100644 index 0000000..f0e232b --- /dev/null +++ b/drivers/gpu/drm/msm/dsi/dsi.h @@ -0,0 +1,118 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __DSI_CONNECTOR_H__ +#define __DSI_CONNECTOR_H__ + +#include <linux/platform_device.h> + +#include "drm_crtc.h" +#include "drm_mipi_dsi.h" +#include "drm_panel.h" + +#include "msm_drv.h" + +#define DSI_0 0 +#define DSI_1 1 +#define DSI_MAX 2 + +#define DSI_CLOCK_MASTER DSI_0 +#define DSI_CLOCK_SLAVE DSI_1 + +#define DSI_LEFT DSI_0 +#define DSI_RIGHT DSI_1 + +/* According to the current drm framework sequence, take the encoder of + * DSI_1 as master encoder + */ +#define DSI_ENCODER_MASTER DSI_1 +#define DSI_ENCODER_SLAVE DSI_0 + +struct msm_dsi { + struct msm_drm_sub_dev base; + struct drm_device *dev; + struct platform_device *pdev; + + struct drm_connector *connector; + struct drm_bridge *bridge; + + struct mipi_dsi_host *host; + struct msm_dsi_phy *phy; + struct drm_panel *panel; + unsigned long panel_flags; + bool phy_enabled; + + /* the encoder we are hooked to (outside of dsi block) */ + struct drm_encoder *encoder; + + int id; +}; + +/* dsi manager */ +struct drm_bridge *msm_dsi_manager_bridge_init(u8 id); +void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge); +struct drm_connector *msm_dsi_manager_connector_init(u8 id); +int msm_dsi_manager_phy_enable(int id, + const unsigned long bit_rate, const unsigned long esc_rate, + u32 *clk_pre, u32 *clk_post); +void msm_dsi_manager_phy_disable(int id); +int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg); +bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 iova, u32 len); +int msm_dsi_manager_register(struct msm_dsi *msm_dsi); +void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi); + +/* msm dsi */ +struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi); + +/* dsi host */ +int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg); +void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg); +int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg); +int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg); +void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, + u32 iova, u32 len); +int msm_dsi_host_enable(struct mipi_dsi_host *host); +int msm_dsi_host_disable(struct mipi_dsi_host *host); +int msm_dsi_host_power_on(struct mipi_dsi_host *host); +int msm_dsi_host_power_off(struct mipi_dsi_host *host); +int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host, + struct drm_display_mode *mode); +struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host, + unsigned long *panel_flags); +int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer); +void msm_dsi_host_unregister(struct mipi_dsi_host *host); +void msm_dsi_host_destroy(struct mipi_dsi_host *host); +int msm_dsi_host_modeset_init(struct mipi_dsi_host *host, + struct drm_device *dev); +int msm_dsi_host_init(struct msm_dsi *msm_dsi); + +/* dsi phy */ +struct msm_dsi_phy; +enum msm_dsi_phy_type { + MSM_DSI_PHY_UNKNOWN, + MSM_DSI_PHY_28NM, + MSM_DSI_PHY_MAX +}; +struct msm_dsi_phy *msm_dsi_phy_init(struct platform_device *pdev, + enum msm_dsi_phy_type type, int id); +int msm_dsi_phy_enable(struct msm_dsi_phy *phy, bool is_dual_panel, + const unsigned long bit_rate, const unsigned long esc_rate); +int msm_dsi_phy_disable(struct msm_dsi_phy *phy); +void msm_dsi_phy_get_clk_pre_post(struct msm_dsi_phy *phy, + u32 *clk_pre, u32 *clk_post); +#endif /* __DSI_CONNECTOR_H__ */ + diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c new file mode 100644 index 0000000..ce2d4f9 --- /dev/null +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -0,0 +1,1992 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/clk.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/gpio.h> +#include <linux/interrupt.h> +#include <linux/of_device.h> +#include <linux/of_gpio.h> +#include <linux/of_irq.h> +#include <linux/regulator/consumer.h> +#include <linux/spinlock.h> +#include <video/mipi_display.h> + +#include "dsi.h" +#include "dsi.xml.h" + +#define MSM_DSI_VER_MAJOR_V2 0x02 +#define MSM_DSI_VER_MAJOR_6G 0x03 +#define MSM_DSI_6G_VER_MINOR_V1_0 0x10000000 +#define MSM_DSI_6G_VER_MINOR_V1_1 0x10010000 +#define MSM_DSI_6G_VER_MINOR_V1_1_1 0x10010001 +#define MSM_DSI_6G_VER_MINOR_V1_2 0x10020000 +#define MSM_DSI_6G_VER_MINOR_V1_3_1 0x10030001 + +#define DSI_6G_REG_SHIFT 4 + +#define DSI_REGULATOR_MAX 8 +struct dsi_reg_entry { + char name[32]; + int min_voltage; + int max_voltage; + int enable_load; + int disable_load; +}; + +struct dsi_reg_config { + int num; + struct dsi_reg_entry regs[DSI_REGULATOR_MAX]; +}; + +struct dsi_config { + u32 major; + u32 minor; + u32 io_offset; + enum msm_dsi_phy_type phy_type; + struct dsi_reg_config reg_cfg; +}; + +static const struct dsi_config dsi_cfgs[] = { + {MSM_DSI_VER_MAJOR_V2, 0, 0, MSM_DSI_PHY_UNKNOWN}, + { /* 8974 v1 */ + .major = MSM_DSI_VER_MAJOR_6G, + .minor = MSM_DSI_6G_VER_MINOR_V1_0, + .io_offset = DSI_6G_REG_SHIFT, + .phy_type = MSM_DSI_PHY_28NM, + .reg_cfg = { + .num = 4, + .regs = { + {"gdsc", -1, -1, -1, -1}, + {"vdd", 3000000, 3000000, 150000, 100}, + {"vdda", 1200000, 1200000, 100000, 100}, + {"vddio", 1800000, 1800000, 100000, 100}, + }, + }, + }, + { /* 8974 v2 */ + .major = MSM_DSI_VER_MAJOR_6G, + .minor = MSM_DSI_6G_VER_MINOR_V1_1, + .io_offset = DSI_6G_REG_SHIFT, + .phy_type = MSM_DSI_PHY_28NM, + .reg_cfg = { + .num = 4, + .regs = { + {"gdsc", -1, -1, -1, -1}, + {"vdd", 3000000, 3000000, 150000, 100}, + {"vdda", 1200000, 1200000, 100000, 100}, + {"vddio", 1800000, 1800000, 100000, 100}, + }, + }, + }, + { /* 8974 v3 */ + .major = MSM_DSI_VER_MAJOR_6G, + .minor = MSM_DSI_6G_VER_MINOR_V1_1_1, + .io_offset = DSI_6G_REG_SHIFT, + .phy_type = MSM_DSI_PHY_28NM, + .reg_cfg = { + .num = 4, + .regs = { + {"gdsc", -1, -1, -1, -1}, + {"vdd", 3000000, 3000000, 150000, 100}, + {"vdda", 1200000, 1200000, 100000, 100}, + {"vddio", 1800000, 1800000, 100000, 100}, + }, + }, + }, + { /* 8084 */ + .major = MSM_DSI_VER_MAJOR_6G, + .minor = MSM_DSI_6G_VER_MINOR_V1_2, + .io_offset = DSI_6G_REG_SHIFT, + .phy_type = MSM_DSI_PHY_28NM, + .reg_cfg = { + .num = 4, + .regs = { + {"gdsc", -1, -1, -1, -1}, + {"vdd", 3000000, 3000000, 150000, 100}, + {"vdda", 1200000, 1200000, 100000, 100}, + {"vddio", 1800000, 1800000, 100000, 100}, + }, + }, + }, + { /* 8916 */ + .major = MSM_DSI_VER_MAJOR_6G, + .minor = MSM_DSI_6G_VER_MINOR_V1_3_1, + .io_offset = DSI_6G_REG_SHIFT, + .phy_type = MSM_DSI_PHY_28NM, + .reg_cfg = { + .num = 4, + .regs = { + {"gdsc", -1, -1, -1, -1}, + {"vdd", 2850000, 2850000, 100000, 100}, + {"vdda", 1200000, 1200000, 100000, 100}, + {"vddio", 1800000, 1800000, 100000, 100}, + }, + }, + }, +}; + +static int dsi_get_version(const void __iomem *base, u32 *major, u32 *minor) +{ + u32 ver; + u32 ver_6g; + + if (!major || !minor) + return -EINVAL; + + /* From DSI6G(v3), addition of a 6G_HW_VERSION register at offset 0 + * makes all other registers 4-byte shifted down. + */ + ver_6g = msm_readl(base + REG_DSI_6G_HW_VERSION); + if (ver_6g == 0) { + ver = msm_readl(base + REG_DSI_VERSION); + ver = FIELD(ver, DSI_VERSION_MAJOR); + if (ver <= MSM_DSI_VER_MAJOR_V2) { + /* old versions */ + *major = ver; + *minor = 0; + return 0; + } else { + return -EINVAL; + } + } else { + ver = msm_readl(base + DSI_6G_REG_SHIFT + REG_DSI_VERSION); + ver = FIELD(ver, DSI_VERSION_MAJOR); + if (ver == MSM_DSI_VER_MAJOR_6G) { + /* 6G version */ + *major = ver; + *minor = ver_6g; + return 0; + } else { + return -EINVAL; + } + } +} + +#define DSI_ERR_STATE_ACK 0x0000 +#define DSI_ERR_STATE_TIMEOUT 0x0001 +#define DSI_ERR_STATE_DLN0_PHY 0x0002 +#define DSI_ERR_STATE_FIFO 0x0004 +#define DSI_ERR_STATE_MDP_FIFO_UNDERFLOW 0x0008 +#define DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION 0x0010 +#define DSI_ERR_STATE_PLL_UNLOCKED 0x0020 + +#define DSI_CLK_CTRL_ENABLE_CLKS \ + (DSI_CLK_CTRL_AHBS_HCLK_ON | DSI_CLK_CTRL_AHBM_SCLK_ON | \ + DSI_CLK_CTRL_PCLK_ON | DSI_CLK_CTRL_DSICLK_ON | \ + DSI_CLK_CTRL_BYTECLK_ON | DSI_CLK_CTRL_ESCCLK_ON | \ + DSI_CLK_CTRL_FORCE_ON_DYN_AHBM_HCLK) + +struct msm_dsi_host { + struct mipi_dsi_host base; + + struct platform_device *pdev; + struct drm_device *dev; + + int id; + + void __iomem *ctrl_base; + struct regulator_bulk_data supplies[DSI_REGULATOR_MAX]; + struct clk *mdp_core_clk; + struct clk *ahb_clk; + struct clk *axi_clk; + struct clk *mmss_misc_ahb_clk; + struct clk *byte_clk; + struct clk *esc_clk; + struct clk *pixel_clk; + u32 byte_clk_rate; + + struct gpio_desc *disp_en_gpio; + struct gpio_desc *te_gpio; + + const struct dsi_config *cfg; + + struct completion dma_comp; + struct completion video_comp; + struct mutex dev_mutex; + struct mutex cmd_mutex; + struct mutex clk_mutex; + spinlock_t intr_lock; /* Protect interrupt ctrl register */ + + u32 err_work_state; + struct work_struct err_work; + struct workqueue_struct *workqueue; + + struct drm_gem_object *tx_gem_obj; + u8 *rx_buf; + + struct drm_display_mode *mode; + + /* Panel info */ + struct device_node *panel_node; + unsigned int channel; + unsigned int lanes; + enum mipi_dsi_pixel_format format; + unsigned long mode_flags; + + u32 dma_cmd_ctrl_restore; + + bool registered; + bool power_on; + int irq; +}; + +static u32 dsi_get_bpp(const enum mipi_dsi_pixel_format fmt) +{ + switch (fmt) { + case MIPI_DSI_FMT_RGB565: return 16; + case MIPI_DSI_FMT_RGB666_PACKED: return 18; + case MIPI_DSI_FMT_RGB666: + case MIPI_DSI_FMT_RGB888: + default: return 24; + } +} + +static inline u32 dsi_read(struct msm_dsi_host *msm_host, u32 reg) +{ + return msm_readl(msm_host->ctrl_base + msm_host->cfg->io_offset + reg); +} +static inline void dsi_write(struct msm_dsi_host *msm_host, u32 reg, u32 data) +{ + msm_writel(data, msm_host->ctrl_base + msm_host->cfg->io_offset + reg); +} + +static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host); +static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host); + +static const struct dsi_config *dsi_get_config(struct msm_dsi_host *msm_host) +{ + const struct dsi_config *cfg; + struct regulator *gdsc_reg; + int i, ret; + u32 major, minor; + + gdsc_reg = regulator_get(&msm_host->pdev->dev, "gdsc"); + if (IS_ERR_OR_NULL(gdsc_reg)) { + pr_err("%s: cannot get gdsc\n", __func__); + goto fail; + } + ret = regulator_enable(gdsc_reg); + if (ret) { + pr_err("%s: unable to enable gdsc\n", __func__); + regulator_put(gdsc_reg); + goto fail; + } + ret = clk_prepare_enable(msm_host->ahb_clk); + if (ret) { + pr_err("%s: unable to enable ahb_clk\n", __func__); + regulator_disable(gdsc_reg); + regulator_put(gdsc_reg); + goto fail; + } + + ret = dsi_get_version(msm_host->ctrl_base, &major, &minor); + + clk_disable_unprepare(msm_host->ahb_clk); + regulator_disable(gdsc_reg); + regulator_put(gdsc_reg); + if (ret) { + pr_err("%s: Invalid version\n", __func__); + goto fail; + } + + for (i = 0; i < ARRAY_SIZE(dsi_cfgs); i++) { + cfg = dsi_cfgs + i; + if ((cfg->major == major) && (cfg->minor == minor)) + return cfg; + } + pr_err("%s: Version %x:%x not support\n", __func__, major, minor); + +fail: + return NULL; +} + +static inline struct msm_dsi_host *to_msm_dsi_host(struct mipi_dsi_host *host) +{ + return container_of(host, struct msm_dsi_host, base); +} + +static void dsi_host_regulator_disable(struct msm_dsi_host *msm_host) +{ + struct regulator_bulk_data *s = msm_host->supplies; + const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs; + int num = msm_host->cfg->reg_cfg.num; + int i; + + DBG(""); + for (i = num - 1; i >= 0; i--) + if (regs[i].disable_load >= 0) + regulator_set_optimum_mode(s[i].consumer, + regs[i].disable_load); + + regulator_bulk_disable(num, s); +} + +static int dsi_host_regulator_enable(struct msm_dsi_host *msm_host) +{ + struct regulator_bulk_data *s = msm_host->supplies; + const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs; + int num = msm_host->cfg->reg_cfg.num; + int ret, i; + + DBG(""); + for (i = 0; i < num; i++) { + if (regs[i].enable_load >= 0) { + ret = regulator_set_optimum_mode(s[i].consumer, + regs[i].enable_load); + if (ret < 0) { + pr_err("regulator %d set op mode failed, %d\n", + i, ret); + goto fail; + } + } + } + + ret = regulator_bulk_enable(num, s); + if (ret < 0) { + pr_err("regulator enable failed, %d\n", ret); + goto fail; + } + + return 0; + +fail: + for (i--; i >= 0; i--) + regulator_set_optimum_mode(s[i].consumer, regs[i].disable_load); + return ret; +} + +static int dsi_regulator_init(struct msm_dsi_host *msm_host) +{ + struct regulator_bulk_data *s = msm_host->supplies; + const struct dsi_reg_entry *regs = msm_host->cfg->reg_cfg.regs; + int num = msm_host->cfg->reg_cfg.num; + int i, ret; + + for (i = 0; i < num; i++) + s[i].supply = regs[i].name; + + ret = devm_regulator_bulk_get(&msm_host->pdev->dev, num, s); + if (ret < 0) { + pr_err("%s: failed to init regulator, ret=%d\n", + __func__, ret); + return ret; + } + + for (i = 0; i < num; i++) { + if ((regs[i].min_voltage >= 0) && (regs[i].max_voltage >= 0)) { + ret = regulator_set_voltage(s[i].consumer, + regs[i].min_voltage, regs[i].max_voltage); + if (ret < 0) { + pr_err("regulator %d set voltage failed, %d\n", + i, ret); + return ret; + } + } + } + + return 0; +} + +static int dsi_clk_init(struct msm_dsi_host *msm_host) +{ + struct device *dev = &msm_host->pdev->dev; + int ret = 0; + + msm_host->mdp_core_clk = devm_clk_get(dev, "mdp_core_clk"); + if (IS_ERR(msm_host->mdp_core_clk)) { + ret = PTR_ERR(msm_host->mdp_core_clk); + pr_err("%s: Unable to get mdp core clk. ret=%d\n", + __func__, ret); + goto exit; + } + + msm_host->ahb_clk = devm_clk_get(dev, "iface_clk"); + if (IS_ERR(msm_host->ahb_clk)) { + ret = PTR_ERR(msm_host->ahb_clk); + pr_err("%s: Unable to get mdss ahb clk. ret=%d\n", + __func__, ret); + goto exit; + } + + msm_host->axi_clk = devm_clk_get(dev, "bus_clk"); + if (IS_ERR(msm_host->axi_clk)) { + ret = PTR_ERR(msm_host->axi_clk); + pr_err("%s: Unable to get axi bus clk. ret=%d\n", + __func__, ret); + goto exit; + } + + msm_host->mmss_misc_ahb_clk = devm_clk_get(dev, "core_mmss_clk"); + if (IS_ERR(msm_host->mmss_misc_ahb_clk)) { + ret = PTR_ERR(msm_host->mmss_misc_ahb_clk); + pr_err("%s: Unable to get mmss misc ahb clk. ret=%d\n", + __func__, ret); + goto exit; + } + + msm_host->byte_clk = devm_clk_get(dev, "byte_clk"); + if (IS_ERR(msm_host->byte_clk)) { + ret = PTR_ERR(msm_host->byte_clk); + pr_err("%s: can't find dsi_byte_clk. ret=%d\n", + __func__, ret); + msm_host->byte_clk = NULL; + goto exit; + } + + msm_host->pixel_clk = devm_clk_get(dev, "pixel_clk"); + if (IS_ERR(msm_host->pixel_clk)) { + ret = PTR_ERR(msm_host->pixel_clk); + pr_err("%s: can't find dsi_pixel_clk. ret=%d\n", + __func__, ret); + msm_host->pixel_clk = NULL; + goto exit; + } + + msm_host->esc_clk = devm_clk_get(dev, "core_clk"); + if (IS_ERR(msm_host->esc_clk)) { + ret = PTR_ERR(msm_host->esc_clk); + pr_err("%s: can't find dsi_esc_clk. ret=%d\n", + __func__, ret); + msm_host->esc_clk = NULL; + goto exit; + } + +exit: + return ret; +} + +static int dsi_bus_clk_enable(struct msm_dsi_host *msm_host) +{ + int ret; + + DBG("id=%d", msm_host->id); + + ret = clk_prepare_enable(msm_host->mdp_core_clk); + if (ret) { + pr_err("%s: failed to enable mdp_core_clock, %d\n", + __func__, ret); + goto core_clk_err; + } + + ret = clk_prepare_enable(msm_host->ahb_clk); + if (ret) { + pr_err("%s: failed to enable ahb clock, %d\n", __func__, ret); + goto ahb_clk_err; + } + + ret = clk_prepare_enable(msm_host->axi_clk); + if (ret) { + pr_err("%s: failed to enable ahb clock, %d\n", __func__, ret); + goto axi_clk_err; + } + + ret = clk_prepare_enable(msm_host->mmss_misc_ahb_clk); + if (ret) { + pr_err("%s: failed to enable mmss misc ahb clk, %d\n", + __func__, ret); + goto misc_ahb_clk_err; + } + + return 0; + +misc_ahb_clk_err: + clk_disable_unprepare(msm_host->axi_clk); +axi_clk_err: + clk_disable_unprepare(msm_host->ahb_clk); +ahb_clk_err: + clk_disable_unprepare(msm_host->mdp_core_clk); +core_clk_err: + return ret; +} + +static void dsi_bus_clk_disable(struct msm_dsi_host *msm_host) +{ + DBG(""); + clk_disable_unprepare(msm_host->mmss_misc_ahb_clk); + clk_disable_unprepare(msm_host->axi_clk); + clk_disable_unprepare(msm_host->ahb_clk); + clk_disable_unprepare(msm_host->mdp_core_clk); +} + +static int dsi_link_clk_enable(struct msm_dsi_host *msm_host) +{ + int ret; + + DBG("Set clk rates: pclk=%d, byteclk=%d", + msm_host->mode->clock, msm_host->byte_clk_rate); + + ret = clk_set_rate(msm_host->byte_clk, msm_host->byte_clk_rate); + if (ret) { + pr_err("%s: Failed to set rate byte clk, %d\n", __func__, ret); + goto error; + } + + ret = clk_set_rate(msm_host->pixel_clk, msm_host->mode->clock * 1000); + if (ret) { + pr_err("%s: Failed to set rate pixel clk, %d\n", __func__, ret); + goto error; + } + + ret = clk_prepare_enable(msm_host->esc_clk); + if (ret) { + pr_err("%s: Failed to enable dsi esc clk\n", __func__); + goto error; + } + + ret = clk_prepare_enable(msm_host->byte_clk); + if (ret) { + pr_err("%s: Failed to enable dsi byte clk\n", __func__); + goto byte_clk_err; + } + + ret = clk_prepare_enable(msm_host->pixel_clk); + if (ret) { + pr_err("%s: Failed to enable dsi pixel clk\n", __func__); + goto pixel_clk_err; + } + + return 0; + +pixel_clk_err: + clk_disable_unprepare(msm_host->byte_clk); +byte_clk_err: + clk_disable_unprepare(msm_host->esc_clk); +error: + return ret; +} + +static void dsi_link_clk_disable(struct msm_dsi_host *msm_host) +{ + clk_disable_unprepare(msm_host->esc_clk); + clk_disable_unprepare(msm_host->pixel_clk); + clk_disable_unprepare(msm_host->byte_clk); +} + +static int dsi_clk_ctrl(struct msm_dsi_host *msm_host, bool enable) +{ + int ret = 0; + + mutex_lock(&msm_host->clk_mutex); + if (enable) { + ret = dsi_bus_clk_enable(msm_host); + if (ret) { + pr_err("%s: Can not enable bus clk, %d\n", + __func__, ret); + goto unlock_ret; + } + ret = dsi_link_clk_enable(msm_host); + if (ret) { + pr_err("%s: Can not enable link clk, %d\n", + __func__, ret); + dsi_bus_clk_disable(msm_host); + goto unlock_ret; + } + } else { + dsi_link_clk_disable(msm_host); + dsi_bus_clk_disable(msm_host); + } + +unlock_ret: + mutex_unlock(&msm_host->clk_mutex); + return ret; +} + +static int dsi_calc_clk_rate(struct msm_dsi_host *msm_host) +{ + struct drm_display_mode *mode = msm_host->mode; + u8 lanes = msm_host->lanes; + u32 bpp = dsi_get_bpp(msm_host->format); + u32 pclk_rate; + + if (!mode) { + pr_err("%s: mode not set\n", __func__); + return -EINVAL; + } + + pclk_rate = mode->clock * 1000; + if (lanes > 0) { + msm_host->byte_clk_rate = (pclk_rate * bpp) / (8 * lanes); + } else { + pr_err("%s: forcing mdss_dsi lanes to 1\n", __func__); + msm_host->byte_clk_rate = (pclk_rate * bpp) / 8; + } + + DBG("pclk=%d, bclk=%d", pclk_rate, msm_host->byte_clk_rate); + + return 0; +} + +static void dsi_phy_sw_reset(struct msm_dsi_host *msm_host) +{ + DBG(""); + dsi_write(msm_host, REG_DSI_PHY_RESET, DSI_PHY_RESET_RESET); + /* Make sure fully reset */ + wmb(); + udelay(1000); + dsi_write(msm_host, REG_DSI_PHY_RESET, 0); + udelay(100); +} + +static void dsi_intr_ctrl(struct msm_dsi_host *msm_host, u32 mask, int enable) +{ + u32 intr; + unsigned long flags; + + spin_lock_irqsave(&msm_host->intr_lock, flags); + intr = dsi_read(msm_host, REG_DSI_INTR_CTRL); + + if (enable) + intr |= mask; + else + intr &= ~mask; + + DBG("intr=%x enable=%d", intr, enable); + + dsi_write(msm_host, REG_DSI_INTR_CTRL, intr); + spin_unlock_irqrestore(&msm_host->intr_lock, flags); +} + +static inline enum dsi_traffic_mode dsi_get_traffic_mode(const u32 mode_flags) +{ + if (mode_flags & MIPI_DSI_MODE_VIDEO_BURST) + return BURST_MODE; + else if (mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) + return NON_BURST_SYNCH_PULSE; + + return NON_BURST_SYNCH_EVENT; +} + +static inline enum dsi_vid_dst_format dsi_get_vid_fmt( + const enum mipi_dsi_pixel_format mipi_fmt) +{ + switch (mipi_fmt) { + case MIPI_DSI_FMT_RGB888: return VID_DST_FORMAT_RGB888; + case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666_LOOSE; + case MIPI_DSI_FMT_RGB666_PACKED: return VID_DST_FORMAT_RGB666; + case MIPI_DSI_FMT_RGB565: return VID_DST_FORMAT_RGB565; + default: return VID_DST_FORMAT_RGB888; + } +} + +static inline enum dsi_cmd_dst_format dsi_get_cmd_fmt( + const enum mipi_dsi_pixel_format mipi_fmt) +{ + switch (mipi_fmt) { + case MIPI_DSI_FMT_RGB888: return CMD_DST_FORMAT_RGB888; + case MIPI_DSI_FMT_RGB666_PACKED: + case MIPI_DSI_FMT_RGB666: return VID_DST_FORMAT_RGB666; + case MIPI_DSI_FMT_RGB565: return CMD_DST_FORMAT_RGB565; + default: return CMD_DST_FORMAT_RGB888; + } +} + +static void dsi_ctrl_config(struct msm_dsi_host *msm_host, bool enable, + u32 clk_pre, u32 clk_post) +{ + u32 flags = msm_host->mode_flags; + enum mipi_dsi_pixel_format mipi_fmt = msm_host->format; + u32 data = 0; + + if (!enable) { + dsi_write(msm_host, REG_DSI_CTRL, 0); + return; + } + + if (flags & MIPI_DSI_MODE_VIDEO) { + if (flags & MIPI_DSI_MODE_VIDEO_HSE) + data |= DSI_VID_CFG0_PULSE_MODE_HSA_HE; + if (flags & MIPI_DSI_MODE_VIDEO_HFP) + data |= DSI_VID_CFG0_HFP_POWER_STOP; + if (flags & MIPI_DSI_MODE_VIDEO_HBP) + data |= DSI_VID_CFG0_HBP_POWER_STOP; + if (flags & MIPI_DSI_MODE_VIDEO_HSA) + data |= DSI_VID_CFG0_HSA_POWER_STOP; + /* Always set low power stop mode for BLLP + * to let command engine send packets + */ + data |= DSI_VID_CFG0_EOF_BLLP_POWER_STOP | + DSI_VID_CFG0_BLLP_POWER_STOP; + data |= DSI_VID_CFG0_TRAFFIC_MODE(dsi_get_traffic_mode(flags)); + data |= DSI_VID_CFG0_DST_FORMAT(dsi_get_vid_fmt(mipi_fmt)); + data |= DSI_VID_CFG0_VIRT_CHANNEL(msm_host->channel); + dsi_write(msm_host, REG_DSI_VID_CFG0, data); + + /* Do not swap RGB colors */ + data = DSI_VID_CFG1_RGB_SWAP(SWAP_RGB); + dsi_write(msm_host, REG_DSI_VID_CFG1, 0); + } else { + /* Do not swap RGB colors */ + data = DSI_CMD_CFG0_RGB_SWAP(SWAP_RGB); + data |= DSI_CMD_CFG0_DST_FORMAT(dsi_get_cmd_fmt(mipi_fmt)); + dsi_write(msm_host, REG_DSI_CMD_CFG0, data); + + data = DSI_CMD_CFG1_WR_MEM_START(MIPI_DCS_WRITE_MEMORY_START) | + DSI_CMD_CFG1_WR_MEM_CONTINUE( + MIPI_DCS_WRITE_MEMORY_CONTINUE); + /* Always insert DCS command */ + data |= DSI_CMD_CFG1_INSERT_DCS_COMMAND; + dsi_write(msm_host, REG_DSI_CMD_CFG1, data); + } + + dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, + DSI_CMD_DMA_CTRL_FROM_FRAME_BUFFER | + DSI_CMD_DMA_CTRL_LOW_POWER); + + data = 0; + /* Always assume dedicated TE pin */ + data |= DSI_TRIG_CTRL_TE; + data |= DSI_TRIG_CTRL_MDP_TRIGGER(TRIGGER_NONE); + data |= DSI_TRIG_CTRL_DMA_TRIGGER(TRIGGER_SW); + data |= DSI_TRIG_CTRL_STREAM(msm_host->channel); + if ((msm_host->cfg->major == MSM_DSI_VER_MAJOR_6G) && + (msm_host->cfg->minor >= MSM_DSI_6G_VER_MINOR_V1_2)) + data |= DSI_TRIG_CTRL_BLOCK_DMA_WITHIN_FRAME; + dsi_write(msm_host, REG_DSI_TRIG_CTRL, data); + + data = DSI_CLKOUT_TIMING_CTRL_T_CLK_POST(clk_post) | + DSI_CLKOUT_TIMING_CTRL_T_CLK_PRE(clk_pre); + dsi_write(msm_host, REG_DSI_CLKOUT_TIMING_CTRL, data); + + data = 0; + if (!(flags & MIPI_DSI_MODE_EOT_PACKET)) + data |= DSI_EOT_PACKET_CTRL_TX_EOT_APPEND; + dsi_write(msm_host, REG_DSI_EOT_PACKET_CTRL, data); + + /* allow only ack-err-status to generate interrupt */ + dsi_write(msm_host, REG_DSI_ERR_INT_MASK0, 0x13ff3fe0); + + dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1); + + dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS); + + data = DSI_CTRL_CLK_EN; + + DBG("lane number=%d", msm_host->lanes); + if (msm_host->lanes == 2) { + data |= DSI_CTRL_LANE1 | DSI_CTRL_LANE2; + /* swap lanes for 2-lane panel for better performance */ + dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL, + DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(LANE_SWAP_1230)); + } else { + /* Take 4 lanes as default */ + data |= DSI_CTRL_LANE0 | DSI_CTRL_LANE1 | DSI_CTRL_LANE2 | + DSI_CTRL_LANE3; + /* Do not swap lanes for 4-lane panel */ + dsi_write(msm_host, REG_DSI_LANE_SWAP_CTRL, + DSI_LANE_SWAP_CTRL_DLN_SWAP_SEL(LANE_SWAP_0123)); + } + data |= DSI_CTRL_ENABLE; + + dsi_write(msm_host, REG_DSI_CTRL, data); +} + +static void dsi_timing_setup(struct msm_dsi_host *msm_host) +{ + struct drm_display_mode *mode = msm_host->mode; + u32 hs_start = 0, vs_start = 0; /* take sync start as 0 */ + u32 h_total = mode->htotal; + u32 v_total = mode->vtotal; + u32 hs_end = mode->hsync_end - mode->hsync_start; + u32 vs_end = mode->vsync_end - mode->vsync_start; + u32 ha_start = h_total - mode->hsync_start; + u32 ha_end = ha_start + mode->hdisplay; + u32 va_start = v_total - mode->vsync_start; + u32 va_end = va_start + mode->vdisplay; + u32 wc; + + DBG(""); + + if (msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) { + dsi_write(msm_host, REG_DSI_ACTIVE_H, + DSI_ACTIVE_H_START(ha_start) | + DSI_ACTIVE_H_END(ha_end)); + dsi_write(msm_host, REG_DSI_ACTIVE_V, + DSI_ACTIVE_V_START(va_start) | + DSI_ACTIVE_V_END(va_end)); + dsi_write(msm_host, REG_DSI_TOTAL, + DSI_TOTAL_H_TOTAL(h_total - 1) | + DSI_TOTAL_V_TOTAL(v_total - 1)); + + dsi_write(msm_host, REG_DSI_ACTIVE_HSYNC, + DSI_ACTIVE_HSYNC_START(hs_start) | + DSI_ACTIVE_HSYNC_END(hs_end)); + dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_HPOS, 0); + dsi_write(msm_host, REG_DSI_ACTIVE_VSYNC_VPOS, + DSI_ACTIVE_VSYNC_VPOS_START(vs_start) | + DSI_ACTIVE_VSYNC_VPOS_END(vs_end)); + } else { /* command mode */ + /* image data and 1 byte write_memory_start cmd */ + wc = mode->hdisplay * dsi_get_bpp(msm_host->format) / 8 + 1; + + dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_CTRL, + DSI_CMD_MDP_STREAM_CTRL_WORD_COUNT(wc) | + DSI_CMD_MDP_STREAM_CTRL_VIRTUAL_CHANNEL( + msm_host->channel) | + DSI_CMD_MDP_STREAM_CTRL_DATA_TYPE( + MIPI_DSI_DCS_LONG_WRITE)); + + dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM_TOTAL, + DSI_CMD_MDP_STREAM_TOTAL_H_TOTAL(mode->hdisplay) | + DSI_CMD_MDP_STREAM_TOTAL_V_TOTAL(mode->vdisplay)); + } +} + +static void dsi_sw_reset(struct msm_dsi_host *msm_host) +{ + dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS); + wmb(); /* clocks need to be enabled before reset */ + + dsi_write(msm_host, REG_DSI_RESET, 1); + wmb(); /* make sure reset happen */ + dsi_write(msm_host, REG_DSI_RESET, 0); +} + +static void dsi_op_mode_config(struct msm_dsi_host *msm_host, + bool video_mode, bool enable) +{ + u32 dsi_ctrl; + + dsi_ctrl = dsi_read(msm_host, REG_DSI_CTRL); + + if (!enable) { + dsi_ctrl &= ~(DSI_CTRL_ENABLE | DSI_CTRL_VID_MODE_EN | + DSI_CTRL_CMD_MODE_EN); + dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE | + DSI_IRQ_MASK_VIDEO_DONE, 0); + } else { + if (video_mode) { + dsi_ctrl |= DSI_CTRL_VID_MODE_EN; + } else { /* command mode */ + dsi_ctrl |= DSI_CTRL_CMD_MODE_EN; + dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_MDP_DONE, 1); + } + dsi_ctrl |= DSI_CTRL_ENABLE; + } + + dsi_write(msm_host, REG_DSI_CTRL, dsi_ctrl); +} + +static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host) +{ + u32 data; + + data = dsi_read(msm_host, REG_DSI_CMD_DMA_CTRL); + + if (mode == 0) + data &= ~DSI_CMD_DMA_CTRL_LOW_POWER; + else + data |= DSI_CMD_DMA_CTRL_LOW_POWER; + + dsi_write(msm_host, REG_DSI_CMD_DMA_CTRL, data); +} + +static void dsi_wait4video_done(struct msm_dsi_host *msm_host) +{ + dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1); + + reinit_completion(&msm_host->video_comp); + + wait_for_completion_timeout(&msm_host->video_comp, + msecs_to_jiffies(70)); + + dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0); +} + +static void dsi_wait4video_eng_busy(struct msm_dsi_host *msm_host) +{ + if (!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO)) + return; + + if (msm_host->power_on) { + dsi_wait4video_done(msm_host); + /* delay 4 ms to skip BLLP */ + usleep_range(2000, 4000); + } +} + +/* dsi_cmd */ +static int dsi_tx_buf_alloc(struct msm_dsi_host *msm_host, int size) +{ + struct drm_device *dev = msm_host->dev; + int ret; + u32 iova; + + mutex_lock(&dev->struct_mutex); + msm_host->tx_gem_obj = msm_gem_new(dev, size, MSM_BO_UNCACHED); + if (IS_ERR(msm_host->tx_gem_obj)) { + ret = PTR_ERR(msm_host->tx_gem_obj); + pr_err("%s: failed to allocate gem, %d\n", __func__, ret); + msm_host->tx_gem_obj = NULL; + mutex_unlock(&dev->struct_mutex); + return ret; + } + + ret = msm_gem_get_iova_locked(msm_host->tx_gem_obj, 0, &iova); + if (ret) { + pr_err("%s: failed to get iova, %d\n", __func__, ret); + return ret; + } + mutex_unlock(&dev->struct_mutex); + + if (iova & 0x07) { + pr_err("%s: buf NOT 8 bytes aligned\n", __func__); + return -EINVAL; + } + + return 0; +} + +static void dsi_tx_buf_free(struct msm_dsi_host *msm_host) +{ + struct drm_device *dev = msm_host->dev; + + if (msm_host->tx_gem_obj) { + msm_gem_put_iova(msm_host->tx_gem_obj, 0); + mutex_lock(&dev->struct_mutex); + msm_gem_free_object(msm_host->tx_gem_obj); + msm_host->tx_gem_obj = NULL; + mutex_unlock(&dev->struct_mutex); + } +} + +/* + * prepare cmd buffer to be txed + */ +static int dsi_cmd_dma_add(struct drm_gem_object *tx_gem, + const struct mipi_dsi_msg *msg) +{ + struct mipi_dsi_packet packet; + int len; + int ret; + u8 *data; + + ret = mipi_dsi_create_packet(&packet, msg); + if (ret) { + pr_err("%s: create packet failed, %d\n", __func__, ret); + return ret; + } + len = (packet.size + 3) & (~0x3); + + if (len > tx_gem->size) { + pr_err("%s: packet size is too big\n", __func__); + return -EINVAL; + } + + data = msm_gem_vaddr(tx_gem); + + if (IS_ERR(data)) { + ret = PTR_ERR(data); + pr_err("%s: get vaddr failed, %d\n", __func__, ret); + return ret; + } + + /* MSM specific command format in memory */ + data[0] = packet.header[1]; + data[1] = packet.header[2]; + data[2] = packet.header[0]; + data[3] = BIT(7); /* Last packet */ + if (mipi_dsi_packet_format_is_long(msg->type)) + data[3] |= BIT(6); + if (msg->rx_buf && msg->rx_len) + data[3] |= BIT(5); + + /* Long packet */ + if (packet.payload && packet.payload_length) + memcpy(data + 4, packet.payload, packet.payload_length); + + /* Append 0xff to the end */ + if (packet.size < len) + memset(data + packet.size, 0xff, len - packet.size); + + return len; +} + +/* + * dsi_short_read1_resp: 1 parameter + */ +static int dsi_short_read1_resp(u8 *buf, const struct mipi_dsi_msg *msg) +{ + u8 *data = msg->rx_buf; + if (data && (msg->rx_len >= 1)) { + *data = buf[1]; /* strip out dcs type */ + return 1; + } else { + pr_err("%s: read data does not match with rx_buf len %d\n", + __func__, msg->rx_len); + return -EINVAL; + } +} + +/* + * dsi_short_read2_resp: 2 parameter + */ +static int dsi_short_read2_resp(u8 *buf, const struct mipi_dsi_msg *msg) +{ + u8 *data = msg->rx_buf; + if (data && (msg->rx_len >= 2)) { + data[0] = buf[1]; /* strip out dcs type */ + data[1] = buf[2]; + return 2; + } else { + pr_err("%s: read data does not match with rx_buf len %d\n", + __func__, msg->rx_len); + return -EINVAL; + } +} + +static int dsi_long_read_resp(u8 *buf, const struct mipi_dsi_msg *msg) +{ + /* strip out 4 byte dcs header */ + if (msg->rx_buf && msg->rx_len) + memcpy(msg->rx_buf, buf + 4, msg->rx_len); + + return msg->rx_len; +} + + +static int dsi_cmd_dma_tx(struct msm_dsi_host *msm_host, int len) +{ + int ret; + u32 iova; + bool triggered; + + ret = msm_gem_get_iova(msm_host->tx_gem_obj, 0, &iova); + if (ret) { + pr_err("%s: failed to get iova: %d\n", __func__, ret); + return ret; + } + + reinit_completion(&msm_host->dma_comp); + + dsi_wait4video_eng_busy(msm_host); + + triggered = msm_dsi_manager_cmd_xfer_trigger( + msm_host->id, iova, len); + if (triggered) { + ret = wait_for_completion_timeout(&msm_host->dma_comp, + msecs_to_jiffies(200)); + DBG("ret=%d", ret); + if (ret == 0) + ret = -ETIMEDOUT; + else + ret = len; + } else + ret = len; + + return ret; +} + +static int dsi_cmd_dma_rx(struct msm_dsi_host *msm_host, + u8 *buf, int rx_byte, int pkt_size) +{ + u32 *lp, *temp, data; + int i, j = 0, cnt; + bool ack_error = false; + u32 read_cnt; + u8 reg[16]; + int repeated_bytes = 0; + int buf_offset = buf - msm_host->rx_buf; + + lp = (u32 *)buf; + temp = (u32 *)reg; + cnt = (rx_byte + 3) >> 2; + if (cnt > 4) + cnt = 4; /* 4 x 32 bits registers only */ + + /* Calculate real read data count */ + read_cnt = dsi_read(msm_host, 0x1d4) >> 16; + + ack_error = (rx_byte == 4) ? + (read_cnt == 8) : /* short pkt + 4-byte error pkt */ + (read_cnt == (pkt_size + 6 + 4)); /* long pkt+4-byte error pkt*/ + + if (ack_error) + read_cnt -= 4; /* Remove 4 byte error pkt */ + + /* + * In case of multiple reads from the panel, after the first read, there + * is possibility that there are some bytes in the payload repeating in + * the RDBK_DATA registers. Since we read all the parameters from the + * panel right from the first byte for every pass. We need to skip the + * repeating bytes and then append the new parameters to the rx buffer. + */ + if (read_cnt > 16) { + int bytes_shifted; + /* Any data more than 16 bytes will be shifted out. + * The temp read buffer should already contain these bytes. + * The remaining bytes in read buffer are the repeated bytes. + */ + bytes_shifted = read_cnt - 16; + repeated_bytes = buf_offset - bytes_shifted; + } + + for (i = cnt - 1; i >= 0; i--) { + data = dsi_read(msm_host, REG_DSI_RDBK_DATA(i)); + *temp++ = ntohl(data); /* to host byte order */ + DBG("data = 0x%x and ntohl(data) = 0x%x", data, ntohl(data)); + } + + for (i = repeated_bytes; i < 16; i++) + buf[j++] = reg[i]; + + return j; +} + +static int dsi_cmds2buf_tx(struct msm_dsi_host *msm_host, + const struct mipi_dsi_msg *msg) +{ + int len, ret; + int bllp_len = msm_host->mode->hdisplay * + dsi_get_bpp(msm_host->format) / 8; + + len = dsi_cmd_dma_add(msm_host->tx_gem_obj, msg); + if (!len) { + pr_err("%s: failed to add cmd type = 0x%x\n", + __func__, msg->type); + return -EINVAL; + } + + /* for video mode, do not send cmds more than + * one pixel line, since it only transmit it + * during BLLP. + */ + /* TODO: if the command is sent in LP mode, the bit rate is only + * half of esc clk rate. In this case, if the video is already + * actively streaming, we need to check more carefully if the + * command can be fit into one BLLP. + */ + if ((msm_host->mode_flags & MIPI_DSI_MODE_VIDEO) && (len > bllp_len)) { + pr_err("%s: cmd cannot fit into BLLP period, len=%d\n", + __func__, len); + return -EINVAL; + } + + ret = dsi_cmd_dma_tx(msm_host, len); + if (ret < len) { + pr_err("%s: cmd dma tx failed, type=0x%x, data0=0x%x, len=%d\n", + __func__, msg->type, (*(u8 *)(msg->tx_buf)), len); + return -ECOMM; + } + + return len; +} + +static void dsi_sw_reset_restore(struct msm_dsi_host *msm_host) +{ + u32 data0, data1; + + data0 = dsi_read(msm_host, REG_DSI_CTRL); + data1 = data0; + data1 &= ~DSI_CTRL_ENABLE; + dsi_write(msm_host, REG_DSI_CTRL, data1); + /* + * dsi controller need to be disabled before + * clocks turned on + */ + wmb(); + + dsi_write(msm_host, REG_DSI_CLK_CTRL, DSI_CLK_CTRL_ENABLE_CLKS); + wmb(); /* make sure clocks enabled */ + + /* dsi controller can only be reset while clocks are running */ + dsi_write(msm_host, REG_DSI_RESET, 1); + wmb(); /* make sure reset happen */ + dsi_write(msm_host, REG_DSI_RESET, 0); + wmb(); /* controller out of reset */ + dsi_write(msm_host, REG_DSI_CTRL, data0); + wmb(); /* make sure dsi controller enabled again */ +} + +static void dsi_err_worker(struct work_struct *work) +{ + struct msm_dsi_host *msm_host = + container_of(work, struct msm_dsi_host, err_work); + u32 status = msm_host->err_work_state; + + pr_err("%s: status=%x\n", __func__, status); + if (status & DSI_ERR_STATE_MDP_FIFO_UNDERFLOW) + dsi_sw_reset_restore(msm_host); + + /* It is safe to clear here because error irq is disabled. */ + msm_host->err_work_state = 0; + + /* enable dsi error interrupt */ + dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 1); +} + +static void dsi_ack_err_status(struct msm_dsi_host *msm_host) +{ + u32 status; + + status = dsi_read(msm_host, REG_DSI_ACK_ERR_STATUS); + + if (status) { + dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, status); + /* Writing of an extra 0 needed to clear error bits */ + dsi_write(msm_host, REG_DSI_ACK_ERR_STATUS, 0); + msm_host->err_work_state |= DSI_ERR_STATE_ACK; + } +} + +static void dsi_timeout_status(struct msm_dsi_host *msm_host) +{ + u32 status; + + status = dsi_read(msm_host, REG_DSI_TIMEOUT_STATUS); + + if (status) { + dsi_write(msm_host, REG_DSI_TIMEOUT_STATUS, status); + msm_host->err_work_state |= DSI_ERR_STATE_TIMEOUT; + } +} + +static void dsi_dln0_phy_err(struct msm_dsi_host *msm_host) +{ + u32 status; + + status = dsi_read(msm_host, REG_DSI_DLN0_PHY_ERR); + + if (status) { + dsi_write(msm_host, REG_DSI_DLN0_PHY_ERR, status); + msm_host->err_work_state |= DSI_ERR_STATE_DLN0_PHY; + } +} + +static void dsi_fifo_status(struct msm_dsi_host *msm_host) +{ + u32 status; + + status = dsi_read(msm_host, REG_DSI_FIFO_STATUS); + + /* fifo underflow, overflow */ + if (status) { + dsi_write(msm_host, REG_DSI_FIFO_STATUS, status); + msm_host->err_work_state |= DSI_ERR_STATE_FIFO; + if (status & DSI_FIFO_STATUS_CMD_MDP_FIFO_UNDERFLOW) + msm_host->err_work_state |= + DSI_ERR_STATE_MDP_FIFO_UNDERFLOW; + } +} + +static void dsi_status(struct msm_dsi_host *msm_host) +{ + u32 status; + + status = dsi_read(msm_host, REG_DSI_STATUS0); + + if (status & DSI_STATUS0_INTERLEAVE_OP_CONTENTION) { + dsi_write(msm_host, REG_DSI_STATUS0, status); + msm_host->err_work_state |= + DSI_ERR_STATE_INTERLEAVE_OP_CONTENTION; + } +} + +static void dsi_clk_status(struct msm_dsi_host *msm_host) +{ + u32 status; + + status = dsi_read(msm_host, REG_DSI_CLK_STATUS); + + if (status & DSI_CLK_STATUS_PLL_UNLOCKED) { + dsi_write(msm_host, REG_DSI_CLK_STATUS, status); + msm_host->err_work_state |= DSI_ERR_STATE_PLL_UNLOCKED; + } +} + +static void dsi_error(struct msm_dsi_host *msm_host) +{ + /* disable dsi error interrupt */ + dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_ERROR, 0); + + dsi_clk_status(msm_host); + dsi_fifo_status(msm_host); + dsi_ack_err_status(msm_host); + dsi_timeout_status(msm_host); + dsi_status(msm_host); + dsi_dln0_phy_err(msm_host); + + queue_work(msm_host->workqueue, &msm_host->err_work); +} + +static irqreturn_t dsi_host_irq(int irq, void *ptr) +{ + struct msm_dsi_host *msm_host = ptr; + u32 isr; + unsigned long flags; + + if (!msm_host->ctrl_base) + return IRQ_HANDLED; + + spin_lock_irqsave(&msm_host->intr_lock, flags); + isr = dsi_read(msm_host, REG_DSI_INTR_CTRL); + dsi_write(msm_host, REG_DSI_INTR_CTRL, isr); + spin_unlock_irqrestore(&msm_host->intr_lock, flags); + + DBG("isr=0x%x, id=%d", isr, msm_host->id); + + if (isr & DSI_IRQ_ERROR) + dsi_error(msm_host); + + if (isr & DSI_IRQ_VIDEO_DONE) + complete(&msm_host->video_comp); + + if (isr & DSI_IRQ_CMD_DMA_DONE) + complete(&msm_host->dma_comp); + + return IRQ_HANDLED; +} + +static int dsi_host_init_panel_gpios(struct msm_dsi_host *msm_host, + struct device *panel_device) +{ + int ret; + + msm_host->disp_en_gpio = devm_gpiod_get(panel_device, + "disp-enable"); + if (IS_ERR(msm_host->disp_en_gpio)) { + DBG("cannot get disp-enable-gpios %ld", + PTR_ERR(msm_host->disp_en_gpio)); + msm_host->disp_en_gpio = NULL; + } + if (msm_host->disp_en_gpio) { + ret = gpiod_direction_output(msm_host->disp_en_gpio, 0); + if (ret) { + pr_err("cannot set dir to disp-en-gpios %d\n", ret); + return ret; + } + } + + msm_host->te_gpio = devm_gpiod_get(panel_device, "disp-te"); + if (IS_ERR(msm_host->te_gpio)) { + DBG("cannot get disp-te-gpios %ld", PTR_ERR(msm_host->te_gpio)); + msm_host->te_gpio = NULL; + } + + if (msm_host->te_gpio) { + ret = gpiod_direction_input(msm_host->te_gpio); + if (ret) { + pr_err("%s: cannot set dir to disp-te-gpios, %d\n", + __func__, ret); + return ret; + } + } + + return 0; +} + +static int dsi_host_attach(struct mipi_dsi_host *host, + struct mipi_dsi_device *dsi) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + int ret; + + msm_host->channel = dsi->channel; + msm_host->lanes = dsi->lanes; + msm_host->format = dsi->format; + msm_host->mode_flags = dsi->mode_flags; + + msm_host->panel_node = dsi->dev.of_node; + + /* Some gpios defined in panel DT need to be controlled by host */ + ret = dsi_host_init_panel_gpios(msm_host, &dsi->dev); + if (ret) + return ret; + + DBG("id=%d", msm_host->id); + if (msm_host->dev) + drm_helper_hpd_irq_event(msm_host->dev); + + return 0; +} + +static int dsi_host_detach(struct mipi_dsi_host *host, + struct mipi_dsi_device *dsi) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + msm_host->panel_node = NULL; + + DBG("id=%d", msm_host->id); + if (msm_host->dev) + drm_helper_hpd_irq_event(msm_host->dev); + + return 0; +} + +static ssize_t dsi_host_transfer(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + int ret; + + if (!msg || !msm_host->power_on) + return -EINVAL; + + mutex_lock(&msm_host->cmd_mutex); + ret = msm_dsi_manager_cmd_xfer(msm_host->id, msg); + mutex_unlock(&msm_host->cmd_mutex); + + return ret; +} + +static struct mipi_dsi_host_ops dsi_host_ops = { + .attach = dsi_host_attach, + .detach = dsi_host_detach, + .transfer = dsi_host_transfer, +}; + +int msm_dsi_host_init(struct msm_dsi *msm_dsi) +{ + struct msm_dsi_host *msm_host = NULL; + struct platform_device *pdev = msm_dsi->pdev; + int ret; + + msm_host = devm_kzalloc(&pdev->dev, sizeof(*msm_host), GFP_KERNEL); + if (!msm_host) { + pr_err("%s: FAILED: cannot alloc dsi host\n", + __func__); + ret = -ENOMEM; + goto fail; + } + + ret = of_property_read_u32(pdev->dev.of_node, + "qcom,dsi-host-index", &msm_host->id); + if (ret) { + dev_err(&pdev->dev, + "%s: host index not specified, ret=%d\n", + __func__, ret); + goto fail; + } + msm_host->pdev = pdev; + + ret = dsi_clk_init(msm_host); + if (ret) { + pr_err("%s: unable to initialize dsi clks\n", __func__); + goto fail; + } + + msm_host->ctrl_base = msm_ioremap(pdev, "dsi_ctrl", "DSI CTRL"); + if (IS_ERR(msm_host->ctrl_base)) { + pr_err("%s: unable to map Dsi ctrl base\n", __func__); + ret = PTR_ERR(msm_host->ctrl_base); + goto fail; + } + + msm_host->cfg = dsi_get_config(msm_host); + if (!msm_host->cfg) { + ret = -EINVAL; + pr_err("%s: get config failed\n", __func__); + goto fail; + } + + ret = dsi_regulator_init(msm_host); + if (ret) { + pr_err("%s: regulator init failed\n", __func__); + goto fail; + } + + msm_host->rx_buf = devm_kzalloc(&pdev->dev, SZ_4K, GFP_KERNEL); + if (!msm_host->rx_buf) { + pr_err("%s: alloc rx temp buf failed\n", __func__); + goto fail; + } + + init_completion(&msm_host->dma_comp); + init_completion(&msm_host->video_comp); + mutex_init(&msm_host->dev_mutex); + mutex_init(&msm_host->cmd_mutex); + mutex_init(&msm_host->clk_mutex); + spin_lock_init(&msm_host->intr_lock); + + /* setup workqueue */ + msm_host->workqueue = alloc_ordered_workqueue("dsi_drm_work", 0); + INIT_WORK(&msm_host->err_work, dsi_err_worker); + + msm_dsi->phy = msm_dsi_phy_init(pdev, msm_host->cfg->phy_type, + msm_host->id); + if (!msm_dsi->phy) { + pr_err("%s: phy init failed\n", __func__); + goto fail; + } + msm_dsi->host = &msm_host->base; + msm_dsi->id = msm_host->id; + + DBG("Dsi Host %d initialized", msm_host->id); + return 0; + +fail: + return ret; +} + +void msm_dsi_host_destroy(struct mipi_dsi_host *host) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + DBG(""); + dsi_tx_buf_free(msm_host); + if (msm_host->workqueue) { + flush_workqueue(msm_host->workqueue); + destroy_workqueue(msm_host->workqueue); + msm_host->workqueue = NULL; + } + + mutex_destroy(&msm_host->clk_mutex); + mutex_destroy(&msm_host->cmd_mutex); + mutex_destroy(&msm_host->dev_mutex); +} + +int msm_dsi_host_modeset_init(struct mipi_dsi_host *host, + struct drm_device *dev) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + struct platform_device *pdev = msm_host->pdev; + int ret; + + msm_host->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); + if (msm_host->irq < 0) { + ret = msm_host->irq; + dev_err(dev->dev, "failed to get irq: %d\n", ret); + return ret; + } + + ret = devm_request_irq(&pdev->dev, msm_host->irq, + dsi_host_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "dsi_isr", msm_host); + if (ret < 0) { + dev_err(&pdev->dev, "failed to request IRQ%u: %d\n", + msm_host->irq, ret); + return ret; + } + + msm_host->dev = dev; + ret = dsi_tx_buf_alloc(msm_host, SZ_4K); + if (ret) { + pr_err("%s: alloc tx gem obj failed, %d\n", __func__, ret); + return ret; + } + + return 0; +} + +int msm_dsi_host_register(struct mipi_dsi_host *host, bool check_defer) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + struct device_node *node; + int ret; + + /* Register mipi dsi host */ + if (!msm_host->registered) { + host->dev = &msm_host->pdev->dev; + host->ops = &dsi_host_ops; + ret = mipi_dsi_host_register(host); + if (ret) + return ret; + + msm_host->registered = true; + + /* If the panel driver has not been probed after host register, + * we should defer the host's probe. + * It makes sure panel is connected when fbcon detects + * connector status and gets the proper display mode to + * create framebuffer. + */ + if (check_defer) { + node = of_get_child_by_name(msm_host->pdev->dev.of_node, + "panel"); + if (node) { + if (!of_drm_find_panel(node)) + return -EPROBE_DEFER; + } + } + } + + return 0; +} + +void msm_dsi_host_unregister(struct mipi_dsi_host *host) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + if (msm_host->registered) { + mipi_dsi_host_unregister(host); + host->dev = NULL; + host->ops = NULL; + msm_host->registered = false; + } +} + +int msm_dsi_host_xfer_prepare(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + /* TODO: make sure dsi_cmd_mdp is idle. + * Since DSI6G v1.2.0, we can set DSI_TRIG_CTRL.BLOCK_DMA_WITHIN_FRAME + * to ask H/W to wait until cmd mdp is idle. S/W wait is not needed. + * How to handle the old versions? Wait for mdp cmd done? + */ + + /* + * mdss interrupt is generated in mdp core clock domain + * mdp clock need to be enabled to receive dsi interrupt + */ + dsi_clk_ctrl(msm_host, 1); + + /* TODO: vote for bus bandwidth */ + + if (!(msg->flags & MIPI_DSI_MSG_USE_LPM)) + dsi_set_tx_power_mode(0, msm_host); + + msm_host->dma_cmd_ctrl_restore = dsi_read(msm_host, REG_DSI_CTRL); + dsi_write(msm_host, REG_DSI_CTRL, + msm_host->dma_cmd_ctrl_restore | + DSI_CTRL_CMD_MODE_EN | + DSI_CTRL_ENABLE); + dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 1); + + return 0; +} + +void msm_dsi_host_xfer_restore(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_CMD_DMA_DONE, 0); + dsi_write(msm_host, REG_DSI_CTRL, msm_host->dma_cmd_ctrl_restore); + + if (!(msg->flags & MIPI_DSI_MSG_USE_LPM)) + dsi_set_tx_power_mode(1, msm_host); + + /* TODO: unvote for bus bandwidth */ + + dsi_clk_ctrl(msm_host, 0); +} + +int msm_dsi_host_cmd_tx(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + return dsi_cmds2buf_tx(msm_host, msg); +} + +int msm_dsi_host_cmd_rx(struct mipi_dsi_host *host, + const struct mipi_dsi_msg *msg) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + int data_byte, rx_byte, dlen, end; + int short_response, diff, pkt_size, ret = 0; + char cmd; + int rlen = msg->rx_len; + u8 *buf; + + if (rlen <= 2) { + short_response = 1; + pkt_size = rlen; + rx_byte = 4; + } else { + short_response = 0; + data_byte = 10; /* first read */ + if (rlen < data_byte) + pkt_size = rlen; + else + pkt_size = data_byte; + rx_byte = data_byte + 6; /* 4 header + 2 crc */ + } + + buf = msm_host->rx_buf; + end = 0; + while (!end) { + u8 tx[2] = {pkt_size & 0xff, pkt_size >> 8}; + struct mipi_dsi_msg max_pkt_size_msg = { + .channel = msg->channel, + .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, + .tx_len = 2, + .tx_buf = tx, + }; + + DBG("rlen=%d pkt_size=%d rx_byte=%d", + rlen, pkt_size, rx_byte); + + ret = dsi_cmds2buf_tx(msm_host, &max_pkt_size_msg); + if (ret < 2) { + pr_err("%s: Set max pkt size failed, %d\n", + __func__, ret); + return -EINVAL; + } + + if ((msm_host->cfg->major == MSM_DSI_VER_MAJOR_6G) && + (msm_host->cfg->minor >= MSM_DSI_6G_VER_MINOR_V1_1)) { + /* Clear the RDBK_DATA registers */ + dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, + DSI_RDBK_DATA_CTRL_CLR); + wmb(); /* make sure the RDBK registers are cleared */ + dsi_write(msm_host, REG_DSI_RDBK_DATA_CTRL, 0); + wmb(); /* release cleared status before transfer */ + } + + ret = dsi_cmds2buf_tx(msm_host, msg); + if (ret < msg->tx_len) { + pr_err("%s: Read cmd Tx failed, %d\n", __func__, ret); + return ret; + } + + /* + * once cmd_dma_done interrupt received, + * return data from client is ready and stored + * at RDBK_DATA register already + * since rx fifo is 16 bytes, dcs header is kept at first loop, + * after that dcs header lost during shift into registers + */ + dlen = dsi_cmd_dma_rx(msm_host, buf, rx_byte, pkt_size); + + if (dlen <= 0) + return 0; + + if (short_response) + break; + + if (rlen <= data_byte) { + diff = data_byte - rlen; + end = 1; + } else { + diff = 0; + rlen -= data_byte; + } + + if (!end) { + dlen -= 2; /* 2 crc */ + dlen -= diff; + buf += dlen; /* next start position */ + data_byte = 14; /* NOT first read */ + if (rlen < data_byte) + pkt_size += rlen; + else + pkt_size += data_byte; + DBG("buf=%p dlen=%d diff=%d", buf, dlen, diff); + } + } + + /* + * For single Long read, if the requested rlen < 10, + * we need to shift the start position of rx + * data buffer to skip the bytes which are not + * updated. + */ + if (pkt_size < 10 && !short_response) + buf = msm_host->rx_buf + (10 - rlen); + else + buf = msm_host->rx_buf; + + cmd = buf[0]; + switch (cmd) { + case MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT: + pr_err("%s: rx ACK_ERR_PACLAGE\n", __func__); + ret = 0; + case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE: + case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE: + ret = dsi_short_read1_resp(buf, msg); + break; + case MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE: + case MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE: + ret = dsi_short_read2_resp(buf, msg); + break; + case MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE: + case MIPI_DSI_RX_DCS_LONG_READ_RESPONSE: + ret = dsi_long_read_resp(buf, msg); + break; + default: + pr_warn("%s:Invalid response cmd\n", __func__); + ret = 0; + } + + return ret; +} + +void msm_dsi_host_cmd_xfer_commit(struct mipi_dsi_host *host, u32 iova, u32 len) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + dsi_write(msm_host, REG_DSI_DMA_BASE, iova); + dsi_write(msm_host, REG_DSI_DMA_LEN, len); + dsi_write(msm_host, REG_DSI_TRIG_DMA, 1); + + /* Make sure trigger happens */ + wmb(); +} + +int msm_dsi_host_enable(struct mipi_dsi_host *host) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + dsi_op_mode_config(msm_host, + !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), true); + + /* TODO: clock should be turned off for command mode, + * and only turned on before MDP START. + * This part of code should be enabled once mdp driver support it. + */ + /* if (msm_panel->mode == MSM_DSI_CMD_MODE) + dsi_clk_ctrl(msm_host, 0); */ + + return 0; +} + +int msm_dsi_host_disable(struct mipi_dsi_host *host) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + dsi_op_mode_config(msm_host, + !!(msm_host->mode_flags & MIPI_DSI_MODE_VIDEO), false); + + /* Since we have disabled INTF, the video engine won't stop so that + * the cmd engine will be blocked. + * Reset to disable video engine so that we can send off cmd. + */ + dsi_sw_reset(msm_host); + + return 0; +} + +int msm_dsi_host_power_on(struct mipi_dsi_host *host) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + u32 clk_pre = 0, clk_post = 0; + int ret = 0; + + mutex_lock(&msm_host->dev_mutex); + if (msm_host->power_on) { + DBG("dsi host already on"); + goto unlock_ret; + } + + ret = dsi_calc_clk_rate(msm_host); + if (ret) { + pr_err("%s: unable to calc clk rate, %d\n", __func__, ret); + goto unlock_ret; + } + + ret = dsi_host_regulator_enable(msm_host); + if (ret) { + pr_err("%s:Failed to enable vregs.ret=%d\n", + __func__, ret); + goto unlock_ret; + } + + ret = dsi_bus_clk_enable(msm_host); + if (ret) { + pr_err("%s: failed to enable bus clocks, %d\n", __func__, ret); + goto fail_disable_reg; + } + + dsi_phy_sw_reset(msm_host); + ret = msm_dsi_manager_phy_enable(msm_host->id, + msm_host->byte_clk_rate * 8, + clk_get_rate(msm_host->esc_clk), + &clk_pre, &clk_post); + dsi_bus_clk_disable(msm_host); + if (ret) { + pr_err("%s: failed to enable phy, %d\n", __func__, ret); + goto fail_disable_reg; + } + + ret = dsi_clk_ctrl(msm_host, 1); + if (ret) { + pr_err("%s: failed to enable clocks. ret=%d\n", __func__, ret); + goto fail_disable_reg; + } + + dsi_timing_setup(msm_host); + dsi_sw_reset(msm_host); + dsi_ctrl_config(msm_host, true, clk_pre, clk_post); + + if (msm_host->disp_en_gpio) + gpiod_set_value(msm_host->disp_en_gpio, 1); + + msm_host->power_on = true; + mutex_unlock(&msm_host->dev_mutex); + + return 0; + +fail_disable_reg: + dsi_host_regulator_disable(msm_host); +unlock_ret: + mutex_unlock(&msm_host->dev_mutex); + return ret; +} + +int msm_dsi_host_power_off(struct mipi_dsi_host *host) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + mutex_lock(&msm_host->dev_mutex); + if (!msm_host->power_on) { + DBG("dsi host already off"); + goto unlock_ret; + } + + dsi_ctrl_config(msm_host, false, 0, 0); + + if (msm_host->disp_en_gpio) + gpiod_set_value(msm_host->disp_en_gpio, 0); + + msm_dsi_manager_phy_disable(msm_host->id); + + dsi_clk_ctrl(msm_host, 0); + + dsi_host_regulator_disable(msm_host); + + DBG("-"); + + msm_host->power_on = false; + +unlock_ret: + mutex_unlock(&msm_host->dev_mutex); + return 0; +} + +int msm_dsi_host_set_display_mode(struct mipi_dsi_host *host, + struct drm_display_mode *mode) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + + if (msm_host->mode) { + drm_mode_destroy(msm_host->dev, msm_host->mode); + msm_host->mode = NULL; + } + + msm_host->mode = drm_mode_duplicate(msm_host->dev, mode); + if (IS_ERR(msm_host->mode)) { + pr_err("%s: cannot duplicate mode\n", __func__); + return PTR_ERR(msm_host->mode); + } + + return 0; +} + +struct drm_panel *msm_dsi_host_get_panel(struct mipi_dsi_host *host, + unsigned long *panel_flags) +{ + struct msm_dsi_host *msm_host = to_msm_dsi_host(host); + struct drm_panel *panel; + + panel = of_drm_find_panel(msm_host->panel_node); + if (panel_flags) + *panel_flags = msm_host->mode_flags; + + return panel; +} + diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c new file mode 100644 index 0000000..766d56c --- /dev/null +++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c @@ -0,0 +1,699 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include "msm_kms.h" +#include "dsi.h" + +struct msm_dsi_manager { + struct msm_dsi *dsi[DSI_MAX]; + + bool is_dual_panel; + bool is_sync_needed; + int master_panel_id; +}; + +static struct msm_dsi_manager msm_dsim_glb; + +#define IS_DUAL_PANEL() (msm_dsim_glb.is_dual_panel) +#define IS_SYNC_NEEDED() (msm_dsim_glb.is_sync_needed) +#define IS_MASTER_PANEL(id) (msm_dsim_glb.master_panel_id == id) + +static inline struct msm_dsi *dsi_mgr_get_dsi(int id) +{ + return msm_dsim_glb.dsi[id]; +} + +static inline struct msm_dsi *dsi_mgr_get_other_dsi(int id) +{ + return msm_dsim_glb.dsi[(id + 1) % DSI_MAX]; +} + +static int dsi_mgr_parse_dual_panel(struct device_node *np, int id) +{ + struct msm_dsi_manager *msm_dsim = &msm_dsim_glb; + + /* We assume 2 dsi nodes have the same information of dual-panel and + * sync-mode, and only one node specifies master in case of dual mode. + */ + if (!msm_dsim->is_dual_panel) + msm_dsim->is_dual_panel = of_property_read_bool( + np, "qcom,dual-panel-mode"); + + if (msm_dsim->is_dual_panel) { + if (of_property_read_bool(np, "qcom,master-panel")) + msm_dsim->master_panel_id = id; + if (!msm_dsim->is_sync_needed) + msm_dsim->is_sync_needed = of_property_read_bool( + np, "qcom,sync-dual-panel"); + } + + return 0; +} + +struct dsi_connector { + struct drm_connector base; + int id; +}; + +struct dsi_bridge { + struct drm_bridge base; + int id; +}; + +#define to_dsi_connector(x) container_of(x, struct dsi_connector, base) +#define to_dsi_bridge(x) container_of(x, struct dsi_bridge, base) + +static inline int dsi_mgr_connector_get_id(struct drm_connector *connector) +{ + struct dsi_connector *dsi_connector = to_dsi_connector(connector); + return dsi_connector->id; +} + +static int dsi_mgr_bridge_get_id(struct drm_bridge *bridge) +{ + struct dsi_bridge *dsi_bridge = to_dsi_bridge(bridge); + return dsi_bridge->id; +} + +static enum drm_connector_status dsi_mgr_connector_detect( + struct drm_connector *connector, bool force) +{ + int id = dsi_mgr_connector_get_id(connector); + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id); + struct msm_drm_private *priv = connector->dev->dev_private; + struct msm_kms *kms = priv->kms; + + DBG("id=%d", id); + if (!msm_dsi->panel) { + msm_dsi->panel = msm_dsi_host_get_panel(msm_dsi->host, + &msm_dsi->panel_flags); + + /* There is only 1 panel in the global panel list + * for dual panel mode. Therefore slave dsi should get + * the drm_panel instance from master dsi, and + * keep using the panel flags got from the current DSI link. + */ + if (!msm_dsi->panel && IS_DUAL_PANEL() && + !IS_MASTER_PANEL(id) && other_dsi) + msm_dsi->panel = msm_dsi_host_get_panel( + other_dsi->host, NULL); + + if (msm_dsi->panel && IS_DUAL_PANEL()) + drm_object_attach_property(&connector->base, + connector->dev->mode_config.tile_property, 0); + + /* Set split display info to kms once dual panel is connected + * to both hosts + */ + if (msm_dsi->panel && IS_DUAL_PANEL() && + other_dsi && other_dsi->panel) { + bool cmd_mode = !(msm_dsi->panel_flags & + MIPI_DSI_MODE_VIDEO); + struct drm_encoder *encoder = msm_dsi_get_encoder( + dsi_mgr_get_dsi(DSI_ENCODER_MASTER)); + struct drm_encoder *slave_enc = msm_dsi_get_encoder( + dsi_mgr_get_dsi(DSI_ENCODER_SLAVE)); + + if (kms->funcs->set_split_display) + kms->funcs->set_split_display(kms, encoder, + slave_enc, cmd_mode); + else + pr_err("mdp does not support dual panel\n"); + } + } + + return msm_dsi->panel ? connector_status_connected : + connector_status_disconnected; +} + +static void dsi_mgr_connector_destroy(struct drm_connector *connector) +{ + DBG(""); + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static void dsi_dual_connector_fix_modes(struct drm_connector *connector) +{ + struct drm_display_mode *mode, *m; + + /* Only support left-right mode */ + list_for_each_entry_safe(mode, m, &connector->probed_modes, head) { + mode->clock >>= 1; + mode->hdisplay >>= 1; + mode->hsync_start >>= 1; + mode->hsync_end >>= 1; + mode->htotal >>= 1; + drm_mode_set_name(mode); + } +} + +static int dsi_dual_connector_tile_init( + struct drm_connector *connector, int id) +{ + struct drm_display_mode *mode; + /* Fake topology id */ + char topo_id[8] = {'M', 'S', 'M', 'D', 'U', 'D', 'S', 'I'}; + + /* Use the first mode only for now */ + mode = list_first_entry(&connector->probed_modes, + struct drm_display_mode, + head); + if (!mode) + return -EINVAL; + + connector->has_tile = true; + connector->tile_group = drm_mode_get_tile_group( + connector->dev, topo_id); + if (!connector->tile_group) + connector->tile_group = drm_mode_create_tile_group( + connector->dev, topo_id); + if (!connector->tile_group) { + pr_err("%s: failed to create tile group\n", __func__); + return -ENOMEM; + } + + connector->tile_is_single_monitor = true; + + /* mode has been fixed */ + connector->tile_h_size = mode->hdisplay; + connector->tile_v_size = mode->vdisplay; + + /* Only support left-right mode */ + connector->num_h_tile = 2; + connector->num_v_tile = 1; + + connector->tile_v_loc = 0; + connector->tile_h_loc = (id == DSI_RIGHT) ? 1 : 0; + + return 0; +} + +static int dsi_mgr_connector_get_modes(struct drm_connector *connector) +{ + int id = dsi_mgr_connector_get_id(connector); + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct drm_panel *panel = msm_dsi->panel; + int ret, num; + + if (!panel) + return 0; + + /* Since we have 2 connectors, but only 1 drm_panel in dual DSI mode, + * panel should not attach to any connector. + * Only temporarily attach panel to the current connector here, + * to let panel set mode to this connector. + */ + drm_panel_attach(panel, connector); + num = drm_panel_get_modes(panel); + drm_panel_detach(panel); + if (!num) + return 0; + + if (IS_DUAL_PANEL()) { + /* report half resolution to user */ + dsi_dual_connector_fix_modes(connector); + ret = dsi_dual_connector_tile_init(connector, id); + if (ret) + return ret; + ret = drm_mode_connector_set_tile_property(connector); + if (ret) { + pr_err("%s: set tile property failed, %d\n", + __func__, ret); + return ret; + } + } + + return num; +} + +static int dsi_mgr_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + int id = dsi_mgr_connector_get_id(connector); + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi); + struct msm_drm_private *priv = connector->dev->dev_private; + struct msm_kms *kms = priv->kms; + long actual, requested; + + DBG(""); + requested = 1000 * mode->clock; + actual = kms->funcs->round_pixclk(kms, requested, encoder); + + DBG("requested=%ld, actual=%ld", requested, actual); + if (actual != requested) + return MODE_CLOCK_RANGE; + + return MODE_OK; +} + +static struct drm_encoder * +dsi_mgr_connector_best_encoder(struct drm_connector *connector) +{ + int id = dsi_mgr_connector_get_id(connector); + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + + DBG(""); + return msm_dsi_get_encoder(msm_dsi); +} + +static void dsi_mgr_bridge_pre_enable(struct drm_bridge *bridge) +{ + int id = dsi_mgr_bridge_get_id(bridge); + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1); + struct mipi_dsi_host *host = msm_dsi->host; + struct drm_panel *panel = msm_dsi->panel; + bool is_dual_panel = IS_DUAL_PANEL(); + int ret; + + DBG("id=%d", id); + if (!panel || (is_dual_panel && (DSI_1 == id))) + return; + + ret = msm_dsi_host_power_on(host); + if (ret) { + pr_err("%s: power on host %d failed, %d\n", __func__, id, ret); + goto host_on_fail; + } + + if (is_dual_panel && msm_dsi1) { + ret = msm_dsi_host_power_on(msm_dsi1->host); + if (ret) { + pr_err("%s: power on host1 failed, %d\n", + __func__, ret); + goto host1_on_fail; + } + } + + /* Always call panel functions once, because even for dual panels, + * there is only one drm_panel instance. + */ + ret = drm_panel_prepare(panel); + if (ret) { + pr_err("%s: prepare panel %d failed, %d\n", __func__, id, ret); + goto panel_prep_fail; + } + + ret = msm_dsi_host_enable(host); + if (ret) { + pr_err("%s: enable host %d failed, %d\n", __func__, id, ret); + goto host_en_fail; + } + + if (is_dual_panel && msm_dsi1) { + ret = msm_dsi_host_enable(msm_dsi1->host); + if (ret) { + pr_err("%s: enable host1 failed, %d\n", __func__, ret); + goto host1_en_fail; + } + } + + ret = drm_panel_enable(panel); + if (ret) { + pr_err("%s: enable panel %d failed, %d\n", __func__, id, ret); + goto panel_en_fail; + } + + return; + +panel_en_fail: + if (is_dual_panel && msm_dsi1) + msm_dsi_host_disable(msm_dsi1->host); +host1_en_fail: + msm_dsi_host_disable(host); +host_en_fail: + drm_panel_unprepare(panel); +panel_prep_fail: + if (is_dual_panel && msm_dsi1) + msm_dsi_host_power_off(msm_dsi1->host); +host1_on_fail: + msm_dsi_host_power_off(host); +host_on_fail: + return; +} + +static void dsi_mgr_bridge_enable(struct drm_bridge *bridge) +{ + DBG(""); +} + +static void dsi_mgr_bridge_disable(struct drm_bridge *bridge) +{ + DBG(""); +} + +static void dsi_mgr_bridge_post_disable(struct drm_bridge *bridge) +{ + int id = dsi_mgr_bridge_get_id(bridge); + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct msm_dsi *msm_dsi1 = dsi_mgr_get_dsi(DSI_1); + struct mipi_dsi_host *host = msm_dsi->host; + struct drm_panel *panel = msm_dsi->panel; + bool is_dual_panel = IS_DUAL_PANEL(); + int ret; + + DBG("id=%d", id); + + if (!panel || (is_dual_panel && (DSI_1 == id))) + return; + + ret = drm_panel_disable(panel); + if (ret) + pr_err("%s: Panel %d OFF failed, %d\n", __func__, id, ret); + + ret = msm_dsi_host_disable(host); + if (ret) + pr_err("%s: host %d disable failed, %d\n", __func__, id, ret); + + if (is_dual_panel && msm_dsi1) { + ret = msm_dsi_host_disable(msm_dsi1->host); + if (ret) + pr_err("%s: host1 disable failed, %d\n", __func__, ret); + } + + ret = drm_panel_unprepare(panel); + if (ret) + pr_err("%s: Panel %d unprepare failed,%d\n", __func__, id, ret); + + ret = msm_dsi_host_power_off(host); + if (ret) + pr_err("%s: host %d power off failed,%d\n", __func__, id, ret); + + if (is_dual_panel && msm_dsi1) { + ret = msm_dsi_host_power_off(msm_dsi1->host); + if (ret) + pr_err("%s: host1 power off failed, %d\n", + __func__, ret); + } +} + +static void dsi_mgr_bridge_mode_set(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + int id = dsi_mgr_bridge_get_id(bridge); + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id); + struct mipi_dsi_host *host = msm_dsi->host; + bool is_dual_panel = IS_DUAL_PANEL(); + + DBG("set mode: %d:"%s" %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x", + mode->base.id, mode->name, + mode->vrefresh, mode->clock, + mode->hdisplay, mode->hsync_start, + mode->hsync_end, mode->htotal, + mode->vdisplay, mode->vsync_start, + mode->vsync_end, mode->vtotal, + mode->type, mode->flags); + + if (is_dual_panel && (DSI_1 == id)) + return; + + msm_dsi_host_set_display_mode(host, adjusted_mode); + if (is_dual_panel && other_dsi) + msm_dsi_host_set_display_mode(other_dsi->host, adjusted_mode); +} + +static const struct drm_connector_funcs dsi_mgr_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .detect = dsi_mgr_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = dsi_mgr_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = { + .get_modes = dsi_mgr_connector_get_modes, + .mode_valid = dsi_mgr_connector_mode_valid, + .best_encoder = dsi_mgr_connector_best_encoder, +}; + +static const struct drm_bridge_funcs dsi_mgr_bridge_funcs = { + .pre_enable = dsi_mgr_bridge_pre_enable, + .enable = dsi_mgr_bridge_enable, + .disable = dsi_mgr_bridge_disable, + .post_disable = dsi_mgr_bridge_post_disable, + .mode_set = dsi_mgr_bridge_mode_set, +}; + +/* initialize connector */ +struct drm_connector *msm_dsi_manager_connector_init(u8 id) +{ + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct drm_connector *connector = NULL; + struct dsi_connector *dsi_connector; + int ret; + + dsi_connector = devm_kzalloc(msm_dsi->dev->dev, + sizeof(*dsi_connector), GFP_KERNEL); + if (!dsi_connector) { + ret = -ENOMEM; + goto fail; + } + + dsi_connector->id = id; + + connector = &dsi_connector->base; + + ret = drm_connector_init(msm_dsi->dev, connector, + &dsi_mgr_connector_funcs, DRM_MODE_CONNECTOR_DSI); + if (ret) + goto fail; + + drm_connector_helper_add(connector, &dsi_mgr_conn_helper_funcs); + + /* Enable HPD to let hpd event is handled + * when panel is attached to the host. + */ + connector->polled = DRM_CONNECTOR_POLL_HPD; + + /* Display driver doesn't support interlace now. */ + connector->interlace_allowed = 0; + connector->doublescan_allowed = 0; + + ret = drm_connector_register(connector); + if (ret) + goto fail; + + return connector; + +fail: + if (connector) + dsi_mgr_connector_destroy(connector); + + return ERR_PTR(ret); +} + +/* initialize bridge */ +struct drm_bridge *msm_dsi_manager_bridge_init(u8 id) +{ + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct drm_bridge *bridge = NULL; + struct dsi_bridge *dsi_bridge; + int ret; + + dsi_bridge = devm_kzalloc(msm_dsi->dev->dev, + sizeof(*dsi_bridge), GFP_KERNEL); + if (!dsi_bridge) { + ret = -ENOMEM; + goto fail; + } + + dsi_bridge->id = id; + + bridge = &dsi_bridge->base; + bridge->funcs = &dsi_mgr_bridge_funcs; + + ret = drm_bridge_attach(msm_dsi->dev, bridge); + if (ret) + goto fail; + + return bridge; + +fail: + if (bridge) + msm_dsi_manager_bridge_destroy(bridge); + + return ERR_PTR(ret); +} + +void msm_dsi_manager_bridge_destroy(struct drm_bridge *bridge) +{ +} + +int msm_dsi_manager_phy_enable(int id, + const unsigned long bit_rate, const unsigned long esc_rate, + u32 *clk_pre, u32 *clk_post) +{ + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct msm_dsi_phy *phy = msm_dsi->phy; + int ret; + + ret = msm_dsi_phy_enable(phy, IS_DUAL_PANEL(), bit_rate, esc_rate); + if (ret) + return ret; + + msm_dsi->phy_enabled = true; + msm_dsi_phy_get_clk_pre_post(phy, clk_pre, clk_post); + + return 0; +} + +void msm_dsi_manager_phy_disable(int id) +{ + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct msm_dsi *mdsi = dsi_mgr_get_dsi(DSI_CLOCK_MASTER); + struct msm_dsi *sdsi = dsi_mgr_get_dsi(DSI_CLOCK_SLAVE); + struct msm_dsi_phy *phy = msm_dsi->phy; + + /* disable DSI phy + * In dual-dsi configuration, the phy should be disabled for the + * first controller only when the second controller is disabled. + */ + msm_dsi->phy_enabled = false; + if (IS_DUAL_PANEL() && mdsi && sdsi) { + if (!mdsi->phy_enabled && !sdsi->phy_enabled) { + msm_dsi_phy_disable(sdsi->phy); + msm_dsi_phy_disable(mdsi->phy); + } + } else { + msm_dsi_phy_disable(phy); + } +} + +int msm_dsi_manager_cmd_xfer(int id, const struct mipi_dsi_msg *msg) +{ + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0); + struct mipi_dsi_host *host = msm_dsi->host; + bool is_read = (msg->rx_buf && msg->rx_len); + bool need_sync = (IS_SYNC_NEEDED() && !is_read); + int ret; + + if (!msg->tx_buf || !msg->tx_len) + return 0; + + /* In dual master case, panel requires the same commands sent to + * both DSI links. Host issues the command trigger to both links + * when DSI_1 calls the cmd transfer function, no matter it happens + * before or after DSI_0 cmd transfer. + */ + if (need_sync && (id == DSI_0)) + return is_read ? msg->rx_len : msg->tx_len; + + if (need_sync && msm_dsi0) { + ret = msm_dsi_host_xfer_prepare(msm_dsi0->host, msg); + if (ret) { + pr_err("%s: failed to prepare non-trigger host, %d\n", + __func__, ret); + return ret; + } + } + ret = msm_dsi_host_xfer_prepare(host, msg); + if (ret) { + pr_err("%s: failed to prepare host, %d\n", __func__, ret); + goto restore_host0; + } + + ret = is_read ? msm_dsi_host_cmd_rx(host, msg) : + msm_dsi_host_cmd_tx(host, msg); + + msm_dsi_host_xfer_restore(host, msg); + +restore_host0: + if (need_sync && msm_dsi0) + msm_dsi_host_xfer_restore(msm_dsi0->host, msg); + + return ret; +} + +bool msm_dsi_manager_cmd_xfer_trigger(int id, u32 iova, u32 len) +{ + struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id); + struct msm_dsi *msm_dsi0 = dsi_mgr_get_dsi(DSI_0); + struct mipi_dsi_host *host = msm_dsi->host; + + if (IS_SYNC_NEEDED() && (id == DSI_0)) + return false; + + if (IS_SYNC_NEEDED() && msm_dsi0) + msm_dsi_host_cmd_xfer_commit(msm_dsi0->host, iova, len); + + msm_dsi_host_cmd_xfer_commit(host, iova, len); + + return true; +} + +int msm_dsi_manager_register(struct msm_dsi *msm_dsi) +{ + struct msm_dsi_manager *msm_dsim = &msm_dsim_glb; + int id = msm_dsi->id; + struct msm_dsi *other_dsi = dsi_mgr_get_other_dsi(id); + int ret; + + if (id > DSI_MAX) { + pr_err("%s: invalid id %d\n", __func__, id); + return -EINVAL; + } + + if (msm_dsim->dsi[id]) { + pr_err("%s: dsi%d already registered\n", __func__, id); + return -EBUSY; + } + + msm_dsim->dsi[id] = msm_dsi; + + ret = dsi_mgr_parse_dual_panel(msm_dsi->pdev->dev.of_node, id); + if (ret) { + pr_err("%s: failed to parse dual panel info\n", __func__); + return ret; + } + + if (!IS_DUAL_PANEL()) { + ret = msm_dsi_host_register(msm_dsi->host, true); + } else if (!other_dsi) { + return 0; + } else { + struct msm_dsi *mdsi = IS_MASTER_PANEL(id) ? + msm_dsi : other_dsi; + struct msm_dsi *sdsi = IS_MASTER_PANEL(id) ? + other_dsi : msm_dsi; + /* Register slave host first, so that slave DSI device + * has a chance to probe, and do not block the master + * DSI device's probe. + * Also, do not check defer for the slave host, + * because only master DSI device adds the panel to global + * panel list. The panel's device is the master DSI device. + */ + ret = msm_dsi_host_register(sdsi->host, false); + if (ret) + return ret; + ret = msm_dsi_host_register(mdsi->host, true); + } + + return ret; +} + +void msm_dsi_manager_unregister(struct msm_dsi *msm_dsi) +{ + struct msm_dsi_manager *msm_dsim = &msm_dsim_glb; + + msm_dsi_host_unregister(msm_dsi->host); + msm_dsim->dsi[msm_dsi->id] = NULL; +} + diff --git a/drivers/gpu/drm/msm/dsi/dsi_phy.c b/drivers/gpu/drm/msm/dsi/dsi_phy.c new file mode 100644 index 0000000..f0cea89 --- /dev/null +++ b/drivers/gpu/drm/msm/dsi/dsi_phy.c @@ -0,0 +1,352 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include "dsi.h" +#include "dsi.xml.h" + +#define dsi_phy_read(offset) msm_readl((offset)) +#define dsi_phy_write(offset, data) msm_writel((data), (offset)) + +struct dsi_dphy_timing { + u32 clk_pre; + u32 clk_post; + u32 clk_zero; + u32 clk_trail; + u32 clk_prepare; + u32 hs_exit; + u32 hs_zero; + u32 hs_prepare; + u32 hs_trail; + u32 hs_rqst; + u32 ta_go; + u32 ta_sure; + u32 ta_get; +}; + +struct msm_dsi_phy { + void __iomem *base; + void __iomem *reg_base; + int id; + struct dsi_dphy_timing timing; + int (*enable)(struct msm_dsi_phy *phy, bool is_dual_panel, + const unsigned long bit_rate, const unsigned long esc_rate); + int (*disable)(struct msm_dsi_phy *phy); +}; + +#define S_DIV_ROUND_UP(n, d) \ + (((n) >= 0) ? (((n) + (d) - 1) / (d)) : (((n) - (d) + 1) / (d))) + +static inline s32 linear_inter(s32 tmax, s32 tmin, s32 percent, + s32 min_result, bool even) +{ + s32 v; + v = (tmax - tmin) * percent; + v = S_DIV_ROUND_UP(v, 100) + tmin; + if (even && (v & 0x1)) + return max_t(s32, min_result, v - 1); + else + return max_t(s32, min_result, v); +} + +static void dsi_dphy_timing_calc_clk_zero(struct dsi_dphy_timing *timing, + s32 ui, s32 coeff, s32 pcnt) +{ + s32 tmax, tmin, clk_z; + s32 temp; + + /* reset */ + temp = 300 * coeff - ((timing->clk_prepare >> 1) + 1) * 2 * ui; + tmin = S_DIV_ROUND_UP(temp, ui) - 2; + if (tmin > 255) { + tmax = 511; + clk_z = linear_inter(2 * tmin, tmin, pcnt, 0, true); + } else { + tmax = 255; + clk_z = linear_inter(tmax, tmin, pcnt, 0, true); + } + + /* adjust */ + temp = (timing->hs_rqst + timing->clk_prepare + clk_z) & 0x7; + timing->clk_zero = clk_z + 8 - temp; +} + +static int dsi_dphy_timing_calc(struct dsi_dphy_timing *timing, + const unsigned long bit_rate, const unsigned long esc_rate) +{ + s32 ui, lpx; + s32 tmax, tmin; + s32 pcnt0 = 10; + s32 pcnt1 = (bit_rate > 1200000000) ? 15 : 10; + s32 pcnt2 = 10; + s32 pcnt3 = (bit_rate > 180000000) ? 10 : 40; + s32 coeff = 1000; /* Precision, should avoid overflow */ + s32 temp; + + if (!bit_rate || !esc_rate) + return -EINVAL; + + ui = mult_frac(NSEC_PER_MSEC, coeff, bit_rate / 1000); + lpx = mult_frac(NSEC_PER_MSEC, coeff, esc_rate / 1000); + + tmax = S_DIV_ROUND_UP(95 * coeff, ui) - 2; + tmin = S_DIV_ROUND_UP(38 * coeff, ui) - 2; + timing->clk_prepare = linear_inter(tmax, tmin, pcnt0, 0, true); + + temp = lpx / ui; + if (temp & 0x1) + timing->hs_rqst = temp; + else + timing->hs_rqst = max_t(s32, 0, temp - 2); + + /* Calculate clk_zero after clk_prepare and hs_rqst */ + dsi_dphy_timing_calc_clk_zero(timing, ui, coeff, pcnt2); + + temp = 105 * coeff + 12 * ui - 20 * coeff; + tmax = S_DIV_ROUND_UP(temp, ui) - 2; + tmin = S_DIV_ROUND_UP(60 * coeff, ui) - 2; + timing->clk_trail = linear_inter(tmax, tmin, pcnt3, 0, true); + + temp = 85 * coeff + 6 * ui; + tmax = S_DIV_ROUND_UP(temp, ui) - 2; + temp = 40 * coeff + 4 * ui; + tmin = S_DIV_ROUND_UP(temp, ui) - 2; + timing->hs_prepare = linear_inter(tmax, tmin, pcnt1, 0, true); + + tmax = 255; + temp = ((timing->hs_prepare >> 1) + 1) * 2 * ui + 2 * ui; + temp = 145 * coeff + 10 * ui - temp; + tmin = S_DIV_ROUND_UP(temp, ui) - 2; + timing->hs_zero = linear_inter(tmax, tmin, pcnt2, 24, true); + + temp = 105 * coeff + 12 * ui - 20 * coeff; + tmax = S_DIV_ROUND_UP(temp, ui) - 2; + temp = 60 * coeff + 4 * ui; + tmin = DIV_ROUND_UP(temp, ui) - 2; + timing->hs_trail = linear_inter(tmax, tmin, pcnt3, 0, true); + + tmax = 255; + tmin = S_DIV_ROUND_UP(100 * coeff, ui) - 2; + timing->hs_exit = linear_inter(tmax, tmin, pcnt2, 0, true); + + tmax = 63; + temp = ((timing->hs_exit >> 1) + 1) * 2 * ui; + temp = 60 * coeff + 52 * ui - 24 * ui - temp; + tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1; + timing->clk_post = linear_inter(tmax, tmin, pcnt2, 0, false); + + tmax = 63; + temp = ((timing->clk_prepare >> 1) + 1) * 2 * ui; + temp += ((timing->clk_zero >> 1) + 1) * 2 * ui; + temp += 8 * ui + lpx; + tmin = S_DIV_ROUND_UP(temp, 8 * ui) - 1; + if (tmin > tmax) { + temp = linear_inter(2 * tmax, tmin, pcnt2, 0, false) >> 1; + timing->clk_pre = temp >> 1; + temp = (2 * tmax - tmin) * pcnt2; + } else { + timing->clk_pre = linear_inter(tmax, tmin, pcnt2, 0, false); + } + + timing->ta_go = 3; + timing->ta_sure = 0; + timing->ta_get = 4; + + DBG("PHY timings: %d, %d, %d, %d, %d, %d, %d, %d, %d, %d", + timing->clk_pre, timing->clk_post, timing->clk_zero, + timing->clk_trail, timing->clk_prepare, timing->hs_exit, + timing->hs_zero, timing->hs_prepare, timing->hs_trail, + timing->hs_rqst); + + return 0; +} + +static void dsi_28nm_phy_regulator_ctrl(struct msm_dsi_phy *phy, bool enable) +{ + void __iomem *base = phy->reg_base; + + if (!enable) { + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CAL_PWR_CFG, 0); + return; + } + + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_0, 0x0); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CAL_PWR_CFG, 1); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_5, 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_3, 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_2, 0x3); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_1, 0x9); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_0, 0x7); + dsi_phy_write(base + REG_DSI_28nm_PHY_REGULATOR_CTRL_4, 0x20); +} + +static int dsi_28nm_phy_enable(struct msm_dsi_phy *phy, bool is_dual_panel, + const unsigned long bit_rate, const unsigned long esc_rate) +{ + struct dsi_dphy_timing *timing = &phy->timing; + int i; + void __iomem *base = phy->base; + + DBG(""); + + if (dsi_dphy_timing_calc(timing, bit_rate, esc_rate)) { + pr_err("%s: D-PHY timing calculation failed\n", __func__); + return -EINVAL; + } + + dsi_phy_write(base + REG_DSI_28nm_PHY_STRENGTH_0, 0xff); + + dsi_28nm_phy_regulator_ctrl(phy, true); + + dsi_phy_write(base + REG_DSI_28nm_PHY_LDO_CNTRL, 0x00); + + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_0, + DSI_28nm_PHY_TIMING_CTRL_0_CLK_ZERO(timing->clk_zero)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_1, + DSI_28nm_PHY_TIMING_CTRL_1_CLK_TRAIL(timing->clk_trail)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_2, + DSI_28nm_PHY_TIMING_CTRL_2_CLK_PREPARE(timing->clk_prepare)); + if (timing->clk_zero & BIT(8)) + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_3, + DSI_28nm_PHY_TIMING_CTRL_3_CLK_ZERO_8); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_4, + DSI_28nm_PHY_TIMING_CTRL_4_HS_EXIT(timing->hs_exit)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_5, + DSI_28nm_PHY_TIMING_CTRL_5_HS_ZERO(timing->hs_zero)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_6, + DSI_28nm_PHY_TIMING_CTRL_6_HS_PREPARE(timing->hs_prepare)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_7, + DSI_28nm_PHY_TIMING_CTRL_7_HS_TRAIL(timing->hs_trail)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_8, + DSI_28nm_PHY_TIMING_CTRL_8_HS_RQST(timing->hs_rqst)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_9, + DSI_28nm_PHY_TIMING_CTRL_9_TA_GO(timing->ta_go) | + DSI_28nm_PHY_TIMING_CTRL_9_TA_SURE(timing->ta_sure)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_10, + DSI_28nm_PHY_TIMING_CTRL_10_TA_GET(timing->ta_get)); + dsi_phy_write(base + REG_DSI_28nm_PHY_TIMING_CTRL_11, + DSI_28nm_PHY_TIMING_CTRL_11_TRIG3_CMD(0)); + + dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_1, 0x00); + dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f); + + dsi_phy_write(base + REG_DSI_28nm_PHY_STRENGTH_1, 0x6); + + for (i = 0; i < 4; i++) { + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_0(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_1(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_2(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_3(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_DATAPATH(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_DEBUG_SEL(i), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_STR_0(i), 0x1); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_TEST_STR_1(i), 0x97); + } + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(0), 0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(1), 0x5); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(2), 0xa); + dsi_phy_write(base + REG_DSI_28nm_PHY_LN_CFG_4(3), 0xf); + + dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_CFG_1, 0xc0); + dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_TEST_STR0, 0x1); + dsi_phy_write(base + REG_DSI_28nm_PHY_LNCK_TEST_STR1, 0xbb); + + dsi_phy_write(base + REG_DSI_28nm_PHY_CTRL_0, 0x5f); + + if (is_dual_panel && (phy->id != DSI_CLOCK_MASTER)) + dsi_phy_write(base + REG_DSI_28nm_PHY_GLBL_TEST_CTRL, 0x00); + else + dsi_phy_write(base + REG_DSI_28nm_PHY_GLBL_TEST_CTRL, 0x01); + + return 0; +} + +static int dsi_28nm_phy_disable(struct msm_dsi_phy *phy) +{ + dsi_phy_write(phy->base + REG_DSI_28nm_PHY_CTRL_0, 0); + dsi_28nm_phy_regulator_ctrl(phy, false); + + /* + * Wait for the registers writes to complete in order to + * ensure that the phy is completely disabled + */ + wmb(); + + return 0; +} + +#define dsi_phy_func_init(name) \ + do { \ + phy->enable = dsi_##name##_phy_enable; \ + phy->disable = dsi_##name##_phy_disable; \ + } while (0) + +struct msm_dsi_phy *msm_dsi_phy_init(struct platform_device *pdev, + enum msm_dsi_phy_type type, int id) +{ + struct msm_dsi_phy *phy; + + phy = devm_kzalloc(&pdev->dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return NULL; + + phy->base = msm_ioremap(pdev, "dsi_phy", "DSI_PHY"); + if (IS_ERR_OR_NULL(phy->base)) { + pr_err("%s: failed to map phy base\n", __func__); + return NULL; + } + phy->reg_base = msm_ioremap(pdev, "dsi_phy_regulator", "DSI_PHY_REG"); + if (IS_ERR_OR_NULL(phy->reg_base)) { + pr_err("%s: failed to map phy regulator base\n", __func__); + return NULL; + } + + switch (type) { + case MSM_DSI_PHY_28NM: + dsi_phy_func_init(28nm); + break; + default: + pr_err("%s: unsupported type, %d\n", __func__, type); + return NULL; + } + + phy->id = id; + + return phy; +} + +int msm_dsi_phy_enable(struct msm_dsi_phy *phy, bool is_dual_panel, + const unsigned long bit_rate, const unsigned long esc_rate) +{ + if (!phy || !phy->enable) + return -EINVAL; + return phy->enable(phy, is_dual_panel, bit_rate, esc_rate); +} + +int msm_dsi_phy_disable(struct msm_dsi_phy *phy) +{ + if (!phy || !phy->disable) + return -EINVAL; + return phy->disable(phy); +} + +void msm_dsi_phy_get_clk_pre_post(struct msm_dsi_phy *phy, + u32 *clk_pre, u32 *clk_post) +{ + if (!phy) + return; + if (clk_pre) + *clk_pre = phy->timing.clk_pre; + if (clk_post) + *clk_post = phy->timing.clk_post; +} + diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 7b464db..a18683f 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -95,6 +95,9 @@ struct msm_drm_private { */ struct msm_drm_sub_dev *edp;

+ /* DSI is shared by mdp4 and mdp5 */ + struct msm_drm_sub_dev *dsi[2]; + /* when we have more than one 'msm_gpu' these need to be an array: */ struct msm_gpu *gpu; struct msm_file_private *lastctx; @@ -243,6 +246,23 @@ void __exit hdmi_unregister(void); void __init msm_edp_register(void); void __exit msm_edp_unregister(void);

+enum msm_dsi_encoder_id { + MSM_DSI_VIDEO_ENCODER_ID = 0, + MSM_DSI_CMD_ENCODER_ID = 1, + MSM_DSI_ENCODER_NUM = 2 +}; +#ifdef CONFIG_DRM_MSM_DSI +void __init msm_dsi_register(void); +void __exit msm_dsi_unregister(void); +#else +static inline void __init msm_dsi_register(void) +{ +} +static inline void __exit msm_dsi_unregister(void) +{ +} +#endif + #ifdef CONFIG_DEBUG_FS void msm_gem_describe(struct drm_gem_object *obj, struct seq_file *m); void msm_gem_describe_objects(struct list_head *list, struct seq_file *m);