| /* |
| * Copyright (c) 2016-2017, 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. |
| * |
| */ |
| |
| #define pr_fmt(fmt) "dsi-ctrl:[%s] " fmt, __func__ |
| |
| #include <linux/of_device.h> |
| #include <linux/err.h> |
| #include <linux/regulator/consumer.h> |
| #include <linux/clk.h> |
| #include <linux/msm-bus.h> |
| #include <linux/of_irq.h> |
| #include <video/mipi_display.h> |
| |
| #include "msm_drv.h" |
| #include "msm_kms.h" |
| #include "msm_gpu.h" |
| #include "dsi_ctrl.h" |
| #include "dsi_ctrl_hw.h" |
| #include "dsi_clk.h" |
| #include "dsi_pwr.h" |
| #include "dsi_catalog.h" |
| |
| #define DSI_CTRL_DEFAULT_LABEL "MDSS DSI CTRL" |
| |
| #define DSI_CTRL_TX_TO_MS 200 |
| |
| #define TO_ON_OFF(x) ((x) ? "ON" : "OFF") |
| /** |
| * enum dsi_ctrl_driver_ops - controller driver ops |
| */ |
| enum dsi_ctrl_driver_ops { |
| DSI_CTRL_OP_POWER_STATE_CHANGE, |
| DSI_CTRL_OP_CMD_ENGINE, |
| DSI_CTRL_OP_VID_ENGINE, |
| DSI_CTRL_OP_HOST_ENGINE, |
| DSI_CTRL_OP_CMD_TX, |
| DSI_CTRL_OP_HOST_INIT, |
| DSI_CTRL_OP_TPG, |
| DSI_CTRL_OP_PHY_SW_RESET, |
| DSI_CTRL_OP_ASYNC_TIMING, |
| DSI_CTRL_OP_MAX |
| }; |
| |
| struct dsi_ctrl_list_item { |
| struct dsi_ctrl *ctrl; |
| struct list_head list; |
| }; |
| |
| static LIST_HEAD(dsi_ctrl_list); |
| static DEFINE_MUTEX(dsi_ctrl_list_lock); |
| |
| static const enum dsi_ctrl_version dsi_ctrl_v1_4 = DSI_CTRL_VERSION_1_4; |
| static const enum dsi_ctrl_version dsi_ctrl_v2_0 = DSI_CTRL_VERSION_2_0; |
| |
| static const struct of_device_id msm_dsi_of_match[] = { |
| { |
| .compatible = "qcom,dsi-ctrl-hw-v1.4", |
| .data = &dsi_ctrl_v1_4, |
| }, |
| { |
| .compatible = "qcom,dsi-ctrl-hw-v2.0", |
| .data = &dsi_ctrl_v2_0, |
| }, |
| {} |
| }; |
| |
| static ssize_t debugfs_state_info_read(struct file *file, |
| char __user *buff, |
| size_t count, |
| loff_t *ppos) |
| { |
| struct dsi_ctrl *dsi_ctrl = file->private_data; |
| char *buf; |
| u32 len = 0; |
| |
| if (!dsi_ctrl) |
| return -ENODEV; |
| |
| if (*ppos) |
| return 0; |
| |
| buf = kzalloc(SZ_4K, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| /* Dump current state */ |
| len += snprintf((buf + len), (SZ_4K - len), "Current State:\n"); |
| len += snprintf((buf + len), (SZ_4K - len), |
| "\tCTRL_ENGINE = %s\n", |
| TO_ON_OFF(dsi_ctrl->current_state.controller_state)); |
| len += snprintf((buf + len), (SZ_4K - len), |
| "\tVIDEO_ENGINE = %s\n\tCOMMAND_ENGINE = %s\n", |
| TO_ON_OFF(dsi_ctrl->current_state.vid_engine_state), |
| TO_ON_OFF(dsi_ctrl->current_state.cmd_engine_state)); |
| |
| /* Dump clock information */ |
| len += snprintf((buf + len), (SZ_4K - len), "\nClock Info:\n"); |
| len += snprintf((buf + len), (SZ_4K - len), |
| "\tBYTE_CLK = %u, PIXEL_CLK = %u, ESC_CLK = %u\n", |
| dsi_ctrl->clk_freq.byte_clk_rate, |
| dsi_ctrl->clk_freq.pix_clk_rate, |
| dsi_ctrl->clk_freq.esc_clk_rate); |
| |
| /* TODO: make sure that this does not exceed 4K */ |
| if (copy_to_user(buff, buf, len)) { |
| kfree(buf); |
| return -EFAULT; |
| } |
| |
| *ppos += len; |
| kfree(buf); |
| return len; |
| } |
| |
| static ssize_t debugfs_reg_dump_read(struct file *file, |
| char __user *buff, |
| size_t count, |
| loff_t *ppos) |
| { |
| struct dsi_ctrl *dsi_ctrl = file->private_data; |
| char *buf; |
| u32 len = 0; |
| struct dsi_clk_ctrl_info clk_info; |
| int rc = 0; |
| |
| if (!dsi_ctrl) |
| return -ENODEV; |
| |
| if (*ppos) |
| return 0; |
| |
| buf = kzalloc(SZ_4K, GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| clk_info.client = DSI_CLK_REQ_DSI_CLIENT; |
| clk_info.clk_type = DSI_CORE_CLK; |
| clk_info.clk_state = DSI_CLK_ON; |
| |
| rc = dsi_ctrl->clk_cb.dsi_clk_cb(dsi_ctrl->clk_cb.priv, clk_info); |
| if (rc) { |
| pr_err("failed to enable DSI core clocks\n"); |
| kfree(buf); |
| return rc; |
| } |
| |
| if (dsi_ctrl->hw.ops.reg_dump_to_buffer) |
| len = dsi_ctrl->hw.ops.reg_dump_to_buffer(&dsi_ctrl->hw, |
| buf, SZ_4K); |
| |
| clk_info.clk_state = DSI_CLK_OFF; |
| rc = dsi_ctrl->clk_cb.dsi_clk_cb(dsi_ctrl->clk_cb.priv, clk_info); |
| if (rc) { |
| pr_err("failed to disable DSI core clocks\n"); |
| kfree(buf); |
| return rc; |
| } |
| |
| |
| /* TODO: make sure that this does not exceed 4K */ |
| if (copy_to_user(buff, buf, len)) { |
| kfree(buf); |
| return -EFAULT; |
| } |
| |
| *ppos += len; |
| kfree(buf); |
| return len; |
| } |
| |
| static const struct file_operations state_info_fops = { |
| .open = simple_open, |
| .read = debugfs_state_info_read, |
| }; |
| |
| static const struct file_operations reg_dump_fops = { |
| .open = simple_open, |
| .read = debugfs_reg_dump_read, |
| }; |
| |
| static int dsi_ctrl_debugfs_init(struct dsi_ctrl *dsi_ctrl, |
| struct dentry *parent) |
| { |
| int rc = 0; |
| struct dentry *dir, *state_file, *reg_dump; |
| |
| dir = debugfs_create_dir(dsi_ctrl->name, parent); |
| if (IS_ERR_OR_NULL(dir)) { |
| rc = PTR_ERR(dir); |
| pr_err("[DSI_%d] debugfs create dir failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| state_file = debugfs_create_file("state_info", |
| 0444, |
| dir, |
| dsi_ctrl, |
| &state_info_fops); |
| if (IS_ERR_OR_NULL(state_file)) { |
| rc = PTR_ERR(state_file); |
| pr_err("[DSI_%d] state file failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error_remove_dir; |
| } |
| |
| reg_dump = debugfs_create_file("reg_dump", |
| 0444, |
| dir, |
| dsi_ctrl, |
| ®_dump_fops); |
| if (IS_ERR_OR_NULL(reg_dump)) { |
| rc = PTR_ERR(reg_dump); |
| pr_err("[DSI_%d] reg dump file failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error_remove_dir; |
| } |
| |
| dsi_ctrl->debugfs_root = dir; |
| error_remove_dir: |
| debugfs_remove(dir); |
| error: |
| return rc; |
| } |
| |
| static int dsi_ctrl_debugfs_deinit(struct dsi_ctrl *dsi_ctrl) |
| { |
| debugfs_remove(dsi_ctrl->debugfs_root); |
| return 0; |
| } |
| |
| static int dsi_ctrl_check_state(struct dsi_ctrl *dsi_ctrl, |
| enum dsi_ctrl_driver_ops op, |
| u32 op_state) |
| { |
| int rc = 0; |
| struct dsi_ctrl_state_info *state = &dsi_ctrl->current_state; |
| |
| switch (op) { |
| case DSI_CTRL_OP_POWER_STATE_CHANGE: |
| if (state->power_state == op_state) { |
| pr_debug("[%d] No change in state, pwr_state=%d\n", |
| dsi_ctrl->cell_index, op_state); |
| rc = -EINVAL; |
| } else if (state->power_state == DSI_CTRL_POWER_VREG_ON) { |
| if ((state->cmd_engine_state == DSI_CTRL_ENGINE_ON) || |
| (state->vid_engine_state == DSI_CTRL_ENGINE_ON) || |
| (state->controller_state == DSI_CTRL_ENGINE_ON)) { |
| pr_debug("[%d]State error: op=%d: %d, %d, %d\n", |
| dsi_ctrl->cell_index, |
| op_state, |
| state->cmd_engine_state, |
| state->vid_engine_state, |
| state->controller_state); |
| rc = -EINVAL; |
| } |
| } |
| break; |
| case DSI_CTRL_OP_CMD_ENGINE: |
| if (state->cmd_engine_state == op_state) { |
| pr_debug("[%d] No change in state, cmd_state=%d\n", |
| dsi_ctrl->cell_index, op_state); |
| rc = -EINVAL; |
| } else if ((state->power_state != DSI_CTRL_POWER_VREG_ON) || |
| (state->controller_state != DSI_CTRL_ENGINE_ON)) { |
| pr_debug("[%d]State error: op=%d: %d, %d\n", |
| dsi_ctrl->cell_index, |
| op, |
| state->power_state, |
| state->controller_state); |
| rc = -EINVAL; |
| } |
| break; |
| case DSI_CTRL_OP_VID_ENGINE: |
| if (state->vid_engine_state == op_state) { |
| pr_debug("[%d] No change in state, cmd_state=%d\n", |
| dsi_ctrl->cell_index, op_state); |
| rc = -EINVAL; |
| } else if ((state->power_state != DSI_CTRL_POWER_VREG_ON) || |
| (state->controller_state != DSI_CTRL_ENGINE_ON)) { |
| pr_debug("[%d]State error: op=%d: %d, %d\n", |
| dsi_ctrl->cell_index, |
| op, |
| state->power_state, |
| state->controller_state); |
| rc = -EINVAL; |
| } |
| break; |
| case DSI_CTRL_OP_HOST_ENGINE: |
| if (state->controller_state == op_state) { |
| pr_debug("[%d] No change in state, ctrl_state=%d\n", |
| dsi_ctrl->cell_index, op_state); |
| rc = -EINVAL; |
| } else if (state->power_state != DSI_CTRL_POWER_VREG_ON) { |
| pr_debug("[%d]State error (link is off): op=%d:, %d\n", |
| dsi_ctrl->cell_index, |
| op_state, |
| state->power_state); |
| rc = -EINVAL; |
| } else if ((op_state == DSI_CTRL_ENGINE_OFF) && |
| ((state->cmd_engine_state != DSI_CTRL_ENGINE_OFF) || |
| (state->vid_engine_state != DSI_CTRL_ENGINE_OFF))) { |
| pr_debug("[%d]State error (eng on): op=%d: %d, %d\n", |
| dsi_ctrl->cell_index, |
| op_state, |
| state->cmd_engine_state, |
| state->vid_engine_state); |
| rc = -EINVAL; |
| } |
| break; |
| case DSI_CTRL_OP_CMD_TX: |
| if ((state->power_state != DSI_CTRL_POWER_VREG_ON) || |
| (state->host_initialized != true) || |
| (state->cmd_engine_state != DSI_CTRL_ENGINE_ON)) { |
| pr_debug("[%d]State error: op=%d: %d, %d, %d\n", |
| dsi_ctrl->cell_index, |
| op, |
| state->power_state, |
| state->host_initialized, |
| state->cmd_engine_state); |
| rc = -EINVAL; |
| } |
| break; |
| case DSI_CTRL_OP_HOST_INIT: |
| if (state->host_initialized == op_state) { |
| pr_debug("[%d] No change in state, host_init=%d\n", |
| dsi_ctrl->cell_index, op_state); |
| rc = -EINVAL; |
| } else if (state->power_state != DSI_CTRL_POWER_VREG_ON) { |
| pr_debug("[%d]State error: op=%d: %d\n", |
| dsi_ctrl->cell_index, op, state->power_state); |
| rc = -EINVAL; |
| } |
| break; |
| case DSI_CTRL_OP_TPG: |
| if (state->tpg_enabled == op_state) { |
| pr_debug("[%d] No change in state, tpg_enabled=%d\n", |
| dsi_ctrl->cell_index, op_state); |
| rc = -EINVAL; |
| } else if ((state->power_state != DSI_CTRL_POWER_VREG_ON) || |
| (state->controller_state != DSI_CTRL_ENGINE_ON)) { |
| pr_debug("[%d]State error: op=%d: %d, %d\n", |
| dsi_ctrl->cell_index, |
| op, |
| state->power_state, |
| state->controller_state); |
| rc = -EINVAL; |
| } |
| break; |
| case DSI_CTRL_OP_PHY_SW_RESET: |
| if (state->power_state != DSI_CTRL_POWER_VREG_ON) { |
| pr_debug("[%d]State error: op=%d: %d\n", |
| dsi_ctrl->cell_index, op, state->power_state); |
| rc = -EINVAL; |
| } |
| break; |
| case DSI_CTRL_OP_ASYNC_TIMING: |
| if (state->vid_engine_state != op_state) { |
| pr_err("[%d] Unexpected engine state vid_state=%d\n", |
| dsi_ctrl->cell_index, op_state); |
| rc = -EINVAL; |
| } |
| break; |
| default: |
| rc = -ENOTSUPP; |
| break; |
| } |
| |
| return rc; |
| } |
| |
| static void dsi_ctrl_update_state(struct dsi_ctrl *dsi_ctrl, |
| enum dsi_ctrl_driver_ops op, |
| u32 op_state) |
| { |
| struct dsi_ctrl_state_info *state = &dsi_ctrl->current_state; |
| |
| switch (op) { |
| case DSI_CTRL_OP_POWER_STATE_CHANGE: |
| state->power_state = op_state; |
| break; |
| case DSI_CTRL_OP_CMD_ENGINE: |
| state->cmd_engine_state = op_state; |
| break; |
| case DSI_CTRL_OP_VID_ENGINE: |
| state->vid_engine_state = op_state; |
| break; |
| case DSI_CTRL_OP_HOST_ENGINE: |
| state->controller_state = op_state; |
| break; |
| case DSI_CTRL_OP_HOST_INIT: |
| state->host_initialized = (op_state == 1) ? true : false; |
| break; |
| case DSI_CTRL_OP_TPG: |
| state->tpg_enabled = (op_state == 1) ? true : false; |
| break; |
| case DSI_CTRL_OP_CMD_TX: |
| case DSI_CTRL_OP_PHY_SW_RESET: |
| default: |
| break; |
| } |
| } |
| |
| static int dsi_ctrl_init_regmap(struct platform_device *pdev, |
| struct dsi_ctrl *ctrl) |
| { |
| int rc = 0; |
| void __iomem *ptr; |
| |
| ptr = msm_ioremap(pdev, "dsi_ctrl", ctrl->name); |
| if (IS_ERR(ptr)) { |
| rc = PTR_ERR(ptr); |
| return rc; |
| } |
| |
| ctrl->hw.base = ptr; |
| pr_debug("[%s] map dsi_ctrl registers to %p\n", ctrl->name, |
| ctrl->hw.base); |
| |
| ptr = msm_ioremap(pdev, "mmss_misc", ctrl->name); |
| if (IS_ERR(ptr)) { |
| rc = PTR_ERR(ptr); |
| return rc; |
| } |
| |
| ctrl->hw.mmss_misc_base = ptr; |
| pr_debug("[%s] map mmss_misc registers to %p\n", ctrl->name, |
| ctrl->hw.mmss_misc_base); |
| return rc; |
| } |
| |
| static int dsi_ctrl_clocks_deinit(struct dsi_ctrl *ctrl) |
| { |
| struct dsi_core_clk_info *core = &ctrl->clk_info.core_clks; |
| struct dsi_link_clk_info *link = &ctrl->clk_info.link_clks; |
| struct dsi_clk_link_set *rcg = &ctrl->clk_info.rcg_clks; |
| |
| if (core->mdp_core_clk) |
| devm_clk_put(&ctrl->pdev->dev, core->mdp_core_clk); |
| if (core->iface_clk) |
| devm_clk_put(&ctrl->pdev->dev, core->iface_clk); |
| if (core->core_mmss_clk) |
| devm_clk_put(&ctrl->pdev->dev, core->core_mmss_clk); |
| if (core->bus_clk) |
| devm_clk_put(&ctrl->pdev->dev, core->bus_clk); |
| if (core->mnoc_clk) |
| devm_clk_put(&ctrl->pdev->dev, core->mnoc_clk); |
| |
| memset(core, 0x0, sizeof(*core)); |
| |
| if (link->byte_clk) |
| devm_clk_put(&ctrl->pdev->dev, link->byte_clk); |
| if (link->pixel_clk) |
| devm_clk_put(&ctrl->pdev->dev, link->pixel_clk); |
| if (link->esc_clk) |
| devm_clk_put(&ctrl->pdev->dev, link->esc_clk); |
| if (link->byte_intf_clk) |
| devm_clk_put(&ctrl->pdev->dev, link->byte_intf_clk); |
| |
| memset(link, 0x0, sizeof(*link)); |
| |
| if (rcg->byte_clk) |
| devm_clk_put(&ctrl->pdev->dev, rcg->byte_clk); |
| if (rcg->pixel_clk) |
| devm_clk_put(&ctrl->pdev->dev, rcg->pixel_clk); |
| |
| memset(rcg, 0x0, sizeof(*rcg)); |
| |
| return 0; |
| } |
| |
| static int dsi_ctrl_clocks_init(struct platform_device *pdev, |
| struct dsi_ctrl *ctrl) |
| { |
| int rc = 0; |
| struct dsi_core_clk_info *core = &ctrl->clk_info.core_clks; |
| struct dsi_link_clk_info *link = &ctrl->clk_info.link_clks; |
| struct dsi_clk_link_set *rcg = &ctrl->clk_info.rcg_clks; |
| |
| core->mdp_core_clk = devm_clk_get(&pdev->dev, "mdp_core_clk"); |
| if (IS_ERR(core->mdp_core_clk)) { |
| core->mdp_core_clk = NULL; |
| pr_debug("failed to get mdp_core_clk, rc=%d\n", rc); |
| } |
| |
| core->iface_clk = devm_clk_get(&pdev->dev, "iface_clk"); |
| if (IS_ERR(core->iface_clk)) { |
| core->iface_clk = NULL; |
| pr_debug("failed to get iface_clk, rc=%d\n", rc); |
| } |
| |
| core->core_mmss_clk = devm_clk_get(&pdev->dev, "core_mmss_clk"); |
| if (IS_ERR(core->core_mmss_clk)) { |
| core->core_mmss_clk = NULL; |
| pr_debug("failed to get core_mmss_clk, rc=%d\n", rc); |
| } |
| |
| core->bus_clk = devm_clk_get(&pdev->dev, "bus_clk"); |
| if (IS_ERR(core->bus_clk)) { |
| core->bus_clk = NULL; |
| pr_debug("failed to get bus_clk, rc=%d\n", rc); |
| } |
| |
| core->mnoc_clk = devm_clk_get(&pdev->dev, "mnoc_clk"); |
| if (IS_ERR(core->mnoc_clk)) { |
| core->mnoc_clk = NULL; |
| pr_debug("can't get mnoc clock, rc=%d\n", rc); |
| } |
| |
| link->byte_clk = devm_clk_get(&pdev->dev, "byte_clk"); |
| if (IS_ERR(link->byte_clk)) { |
| rc = PTR_ERR(link->byte_clk); |
| pr_err("failed to get byte_clk, rc=%d\n", rc); |
| goto fail; |
| } |
| |
| link->pixel_clk = devm_clk_get(&pdev->dev, "pixel_clk"); |
| if (IS_ERR(link->pixel_clk)) { |
| rc = PTR_ERR(link->pixel_clk); |
| pr_err("failed to get pixel_clk, rc=%d\n", rc); |
| goto fail; |
| } |
| |
| link->esc_clk = devm_clk_get(&pdev->dev, "core_clk"); |
| if (IS_ERR(link->esc_clk)) { |
| rc = PTR_ERR(link->esc_clk); |
| pr_err("failed to get esc_clk, rc=%d\n", rc); |
| goto fail; |
| } |
| |
| link->byte_intf_clk = devm_clk_get(&pdev->dev, "byte_intf_clk"); |
| if (IS_ERR(link->byte_intf_clk)) { |
| link->byte_intf_clk = NULL; |
| pr_debug("can't find byte intf clk, rc=%d\n", rc); |
| } |
| |
| rcg->byte_clk = devm_clk_get(&pdev->dev, "byte_clk_rcg"); |
| if (IS_ERR(rcg->byte_clk)) { |
| rc = PTR_ERR(rcg->byte_clk); |
| pr_err("failed to get byte_clk_rcg, rc=%d\n", rc); |
| goto fail; |
| } |
| |
| rcg->pixel_clk = devm_clk_get(&pdev->dev, "pixel_clk_rcg"); |
| if (IS_ERR(rcg->pixel_clk)) { |
| rc = PTR_ERR(rcg->pixel_clk); |
| pr_err("failed to get pixel_clk_rcg, rc=%d\n", rc); |
| goto fail; |
| } |
| |
| return 0; |
| fail: |
| dsi_ctrl_clocks_deinit(ctrl); |
| return rc; |
| } |
| |
| static int dsi_ctrl_supplies_deinit(struct dsi_ctrl *ctrl) |
| { |
| int i = 0; |
| int rc = 0; |
| struct dsi_regulator_info *regs; |
| |
| regs = &ctrl->pwr_info.digital; |
| for (i = 0; i < regs->count; i++) { |
| if (!regs->vregs[i].vreg) |
| pr_err("vreg is NULL, should not reach here\n"); |
| else |
| devm_regulator_put(regs->vregs[i].vreg); |
| } |
| |
| regs = &ctrl->pwr_info.host_pwr; |
| for (i = 0; i < regs->count; i++) { |
| if (!regs->vregs[i].vreg) |
| pr_err("vreg is NULL, should not reach here\n"); |
| else |
| devm_regulator_put(regs->vregs[i].vreg); |
| } |
| |
| if (!ctrl->pwr_info.host_pwr.vregs) { |
| devm_kfree(&ctrl->pdev->dev, ctrl->pwr_info.host_pwr.vregs); |
| ctrl->pwr_info.host_pwr.vregs = NULL; |
| ctrl->pwr_info.host_pwr.count = 0; |
| } |
| |
| if (!ctrl->pwr_info.digital.vregs) { |
| devm_kfree(&ctrl->pdev->dev, ctrl->pwr_info.digital.vregs); |
| ctrl->pwr_info.digital.vregs = NULL; |
| ctrl->pwr_info.digital.count = 0; |
| } |
| |
| return rc; |
| } |
| |
| static int dsi_ctrl_supplies_init(struct platform_device *pdev, |
| struct dsi_ctrl *ctrl) |
| { |
| int rc = 0; |
| int i = 0; |
| struct dsi_regulator_info *regs; |
| struct regulator *vreg = NULL; |
| |
| rc = dsi_pwr_get_dt_vreg_data(&pdev->dev, |
| &ctrl->pwr_info.digital, |
| "qcom,core-supply-entries"); |
| if (rc) { |
| pr_err("failed to get digital supply, rc = %d\n", rc); |
| goto error; |
| } |
| |
| rc = dsi_pwr_get_dt_vreg_data(&pdev->dev, |
| &ctrl->pwr_info.host_pwr, |
| "qcom,ctrl-supply-entries"); |
| if (rc) { |
| pr_err("failed to get host power supplies, rc = %d\n", rc); |
| goto error_digital; |
| } |
| |
| regs = &ctrl->pwr_info.digital; |
| for (i = 0; i < regs->count; i++) { |
| vreg = devm_regulator_get(&pdev->dev, regs->vregs[i].vreg_name); |
| if (IS_ERR(vreg)) { |
| pr_err("failed to get %s regulator\n", |
| regs->vregs[i].vreg_name); |
| rc = PTR_ERR(vreg); |
| goto error_host_pwr; |
| } |
| regs->vregs[i].vreg = vreg; |
| } |
| |
| regs = &ctrl->pwr_info.host_pwr; |
| for (i = 0; i < regs->count; i++) { |
| vreg = devm_regulator_get(&pdev->dev, regs->vregs[i].vreg_name); |
| if (IS_ERR(vreg)) { |
| pr_err("failed to get %s regulator\n", |
| regs->vregs[i].vreg_name); |
| for (--i; i >= 0; i--) |
| devm_regulator_put(regs->vregs[i].vreg); |
| rc = PTR_ERR(vreg); |
| goto error_digital_put; |
| } |
| regs->vregs[i].vreg = vreg; |
| } |
| |
| return rc; |
| |
| error_digital_put: |
| regs = &ctrl->pwr_info.digital; |
| for (i = 0; i < regs->count; i++) |
| devm_regulator_put(regs->vregs[i].vreg); |
| error_host_pwr: |
| devm_kfree(&pdev->dev, ctrl->pwr_info.host_pwr.vregs); |
| ctrl->pwr_info.host_pwr.vregs = NULL; |
| ctrl->pwr_info.host_pwr.count = 0; |
| error_digital: |
| devm_kfree(&pdev->dev, ctrl->pwr_info.digital.vregs); |
| ctrl->pwr_info.digital.vregs = NULL; |
| ctrl->pwr_info.digital.count = 0; |
| error: |
| return rc; |
| } |
| |
| static int dsi_ctrl_axi_bus_client_init(struct platform_device *pdev, |
| struct dsi_ctrl *ctrl) |
| { |
| int rc = 0; |
| struct dsi_ctrl_bus_scale_info *bus = &ctrl->axi_bus_info; |
| |
| bus->bus_scale_table = msm_bus_cl_get_pdata(pdev); |
| if (IS_ERR_OR_NULL(bus->bus_scale_table)) { |
| rc = PTR_ERR(bus->bus_scale_table); |
| pr_err("msm_bus_cl_get_pdata() failed, rc = %d\n", rc); |
| bus->bus_scale_table = NULL; |
| return rc; |
| } |
| |
| bus->bus_handle = msm_bus_scale_register_client(bus->bus_scale_table); |
| if (!bus->bus_handle) { |
| rc = -EINVAL; |
| pr_err("failed to register axi bus client\n"); |
| } |
| |
| return rc; |
| } |
| |
| static int dsi_ctrl_axi_bus_client_deinit(struct dsi_ctrl *ctrl) |
| { |
| struct dsi_ctrl_bus_scale_info *bus = &ctrl->axi_bus_info; |
| |
| if (bus->bus_handle) { |
| msm_bus_scale_unregister_client(bus->bus_handle); |
| |
| bus->bus_handle = 0; |
| } |
| |
| return 0; |
| } |
| |
| static int dsi_ctrl_validate_panel_info(struct dsi_ctrl *dsi_ctrl, |
| struct dsi_host_config *config) |
| { |
| int rc = 0; |
| struct dsi_host_common_cfg *host_cfg = &config->common_config; |
| |
| if (config->panel_mode >= DSI_OP_MODE_MAX) { |
| pr_err("Invalid dsi operation mode (%d)\n", config->panel_mode); |
| rc = -EINVAL; |
| goto err; |
| } |
| |
| if ((host_cfg->data_lanes & (DSI_CLOCK_LANE - 1)) == 0) { |
| pr_err("No data lanes are enabled\n"); |
| rc = -EINVAL; |
| goto err; |
| } |
| err: |
| return rc; |
| } |
| |
| static int dsi_ctrl_update_link_freqs(struct dsi_ctrl *dsi_ctrl, |
| struct dsi_host_config *config, void *clk_handle) |
| { |
| int rc = 0; |
| u32 num_of_lanes = 0; |
| u32 bpp = 3; |
| u64 h_period, v_period, bit_rate, pclk_rate, bit_rate_per_lane, |
| byte_clk_rate; |
| struct dsi_host_common_cfg *host_cfg = &config->common_config; |
| struct dsi_mode_info *timing = &config->video_timing; |
| |
| if (host_cfg->data_lanes & DSI_DATA_LANE_0) |
| num_of_lanes++; |
| if (host_cfg->data_lanes & DSI_DATA_LANE_1) |
| num_of_lanes++; |
| if (host_cfg->data_lanes & DSI_DATA_LANE_2) |
| num_of_lanes++; |
| if (host_cfg->data_lanes & DSI_DATA_LANE_3) |
| num_of_lanes++; |
| |
| h_period = DSI_H_TOTAL_DSC(timing); |
| v_period = DSI_V_TOTAL(timing); |
| |
| bit_rate = h_period * v_period * timing->refresh_rate * bpp * 8; |
| bit_rate_per_lane = bit_rate; |
| do_div(bit_rate_per_lane, num_of_lanes); |
| pclk_rate = bit_rate; |
| do_div(pclk_rate, (8 * bpp)); |
| byte_clk_rate = bit_rate_per_lane; |
| do_div(byte_clk_rate, 8); |
| pr_debug("bit_clk_rate = %llu, bit_clk_rate_per_lane = %llu\n", |
| bit_rate, bit_rate_per_lane); |
| pr_debug("byte_clk_rate = %llu, pclk_rate = %llu\n", |
| byte_clk_rate, pclk_rate); |
| |
| dsi_ctrl->clk_freq.byte_clk_rate = byte_clk_rate; |
| dsi_ctrl->clk_freq.pix_clk_rate = pclk_rate; |
| dsi_ctrl->clk_freq.esc_clk_rate = config->esc_clk_rate_hz; |
| |
| rc = dsi_clk_set_link_frequencies(clk_handle, dsi_ctrl->clk_freq, |
| dsi_ctrl->cell_index); |
| if (rc) |
| pr_err("Failed to update link frequencies\n"); |
| |
| return rc; |
| } |
| |
| static int dsi_ctrl_enable_supplies(struct dsi_ctrl *dsi_ctrl, bool enable) |
| { |
| int rc = 0; |
| |
| if (enable) { |
| if (!dsi_ctrl->current_state.host_initialized) { |
| rc = dsi_pwr_enable_regulator( |
| &dsi_ctrl->pwr_info.host_pwr, true); |
| if (rc) { |
| pr_err("failed to enable host power regs\n"); |
| goto error; |
| } |
| } |
| |
| rc = dsi_pwr_enable_regulator(&dsi_ctrl->pwr_info.digital, |
| true); |
| if (rc) { |
| pr_err("failed to enable gdsc, rc=%d\n", rc); |
| (void)dsi_pwr_enable_regulator( |
| &dsi_ctrl->pwr_info.host_pwr, |
| false |
| ); |
| goto error; |
| } |
| } else { |
| rc = dsi_pwr_enable_regulator(&dsi_ctrl->pwr_info.digital, |
| false); |
| if (rc) { |
| pr_err("failed to disable gdsc, rc=%d\n", rc); |
| goto error; |
| } |
| |
| if (!dsi_ctrl->current_state.host_initialized) { |
| rc = dsi_pwr_enable_regulator( |
| &dsi_ctrl->pwr_info.host_pwr, false); |
| if (rc) { |
| pr_err("failed to disable host power regs\n"); |
| goto error; |
| } |
| } |
| } |
| error: |
| return rc; |
| } |
| |
| static int dsi_ctrl_copy_and_pad_cmd(struct dsi_ctrl *dsi_ctrl, |
| const struct mipi_dsi_packet *packet, |
| u8 **buffer, |
| u32 *size) |
| { |
| int rc = 0; |
| u8 *buf = NULL; |
| u32 len, i; |
| |
| len = packet->size; |
| len += 0x3; len &= ~0x03; /* Align to 32 bits */ |
| |
| buf = devm_kzalloc(&dsi_ctrl->pdev->dev, len * sizeof(u8), GFP_KERNEL); |
| if (!buf) |
| return -ENOMEM; |
| |
| for (i = 0; i < len; i++) { |
| if (i >= packet->size) |
| buf[i] = 0xFF; |
| else if (i < sizeof(packet->header)) |
| buf[i] = packet->header[i]; |
| else |
| buf[i] = packet->payload[i - sizeof(packet->header)]; |
| } |
| |
| if (packet->payload_length > 0) |
| buf[3] |= BIT(6); |
| |
| buf[3] |= BIT(7); |
| *buffer = buf; |
| *size = len; |
| |
| return rc; |
| } |
| |
| static int dsi_message_tx(struct dsi_ctrl *dsi_ctrl, |
| const struct mipi_dsi_msg *msg, |
| u32 flags) |
| { |
| int rc = 0; |
| struct mipi_dsi_packet packet; |
| struct dsi_ctrl_cmd_dma_fifo_info cmd; |
| u32 hw_flags = 0; |
| u32 length = 0; |
| u8 *buffer = NULL; |
| |
| if (!(flags & DSI_CTRL_CMD_FIFO_STORE)) { |
| pr_err("Memory DMA is not supported, use FIFO\n"); |
| goto error; |
| } |
| |
| rc = mipi_dsi_create_packet(&packet, msg); |
| if (rc) { |
| pr_err("Failed to create message packet, rc=%d\n", rc); |
| goto error; |
| } |
| |
| if (flags & DSI_CTRL_CMD_FIFO_STORE) { |
| rc = dsi_ctrl_copy_and_pad_cmd(dsi_ctrl, |
| &packet, |
| &buffer, |
| &length); |
| if (rc) { |
| pr_err("[%s] failed to copy message, rc=%d\n", |
| dsi_ctrl->name, rc); |
| goto error; |
| } |
| cmd.command = (u32 *)buffer; |
| cmd.size = length; |
| cmd.en_broadcast = (flags & DSI_CTRL_CMD_BROADCAST) ? |
| true : false; |
| cmd.is_master = (flags & DSI_CTRL_CMD_BROADCAST_MASTER) ? |
| true : false; |
| cmd.use_lpm = (msg->flags & MIPI_DSI_MSG_USE_LPM) ? |
| true : false; |
| } |
| |
| hw_flags |= (flags & DSI_CTRL_CMD_DEFER_TRIGGER) ? |
| DSI_CTRL_HW_CMD_WAIT_FOR_TRIGGER : 0; |
| |
| if (!(flags & DSI_CTRL_CMD_DEFER_TRIGGER)) |
| reinit_completion(&dsi_ctrl->int_info.cmd_dma_done); |
| |
| if (flags & DSI_CTRL_CMD_FIFO_STORE) |
| dsi_ctrl->hw.ops.kickoff_fifo_command(&dsi_ctrl->hw, |
| &cmd, |
| hw_flags); |
| |
| if (!(flags & DSI_CTRL_CMD_DEFER_TRIGGER)) { |
| u32 retry = 10; |
| u32 status = 0; |
| u64 error = 0; |
| u32 mask = (DSI_CMD_MODE_DMA_DONE); |
| |
| while ((status == 0) && (retry > 0)) { |
| udelay(1000); |
| status = dsi_ctrl->hw.ops.get_interrupt_status( |
| &dsi_ctrl->hw); |
| error = dsi_ctrl->hw.ops.get_error_status( |
| &dsi_ctrl->hw); |
| status &= mask; |
| retry--; |
| dsi_ctrl->hw.ops.clear_interrupt_status(&dsi_ctrl->hw, |
| status); |
| dsi_ctrl->hw.ops.clear_error_status(&dsi_ctrl->hw, |
| error); |
| } |
| pr_debug("INT STATUS = %x, retry = %d\n", status, retry); |
| if (retry == 0) |
| pr_err("[DSI_%d]Command transfer failed\n", |
| dsi_ctrl->cell_index); |
| |
| dsi_ctrl->hw.ops.reset_cmd_fifo(&dsi_ctrl->hw); |
| } |
| error: |
| if (buffer) |
| devm_kfree(&dsi_ctrl->pdev->dev, buffer); |
| return rc; |
| } |
| |
| static int dsi_set_max_return_size(struct dsi_ctrl *dsi_ctrl, |
| const struct mipi_dsi_msg *rx_msg, |
| u32 size) |
| { |
| int rc = 0; |
| u8 tx[2] = { (u8)(size & 0xFF), (u8)(size >> 8) }; |
| struct mipi_dsi_msg msg = { |
| .channel = rx_msg->channel, |
| .type = MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE, |
| .tx_len = 2, |
| .tx_buf = tx, |
| }; |
| |
| rc = dsi_message_tx(dsi_ctrl, &msg, 0x0); |
| if (rc) |
| pr_err("failed to send max return size packet, rc=%d\n", rc); |
| |
| return rc; |
| } |
| |
| static int dsi_message_rx(struct dsi_ctrl *dsi_ctrl, |
| const struct mipi_dsi_msg *msg, |
| u32 flags) |
| { |
| int rc = 0; |
| u32 rd_pkt_size; |
| u32 total_read_len; |
| u32 bytes_read = 0, tot_bytes_read = 0; |
| u32 current_read_len; |
| bool short_resp = false; |
| bool read_done = false; |
| |
| if (msg->rx_len <= 2) { |
| short_resp = true; |
| rd_pkt_size = msg->rx_len; |
| total_read_len = 4; |
| } else { |
| short_resp = false; |
| current_read_len = 10; |
| if (msg->rx_len < current_read_len) |
| rd_pkt_size = msg->rx_len; |
| else |
| rd_pkt_size = current_read_len; |
| |
| total_read_len = current_read_len + 6; |
| } |
| |
| while (!read_done) { |
| rc = dsi_set_max_return_size(dsi_ctrl, msg, rd_pkt_size); |
| if (rc) { |
| pr_err("Failed to set max return packet size, rc=%d\n", |
| rc); |
| goto error; |
| } |
| |
| rc = dsi_message_tx(dsi_ctrl, msg, flags); |
| if (rc) { |
| pr_err("Message transmission failed, rc=%d\n", rc); |
| goto error; |
| } |
| |
| |
| tot_bytes_read += bytes_read; |
| if (short_resp) |
| read_done = true; |
| else if (msg->rx_len <= tot_bytes_read) |
| read_done = true; |
| } |
| error: |
| return rc; |
| } |
| |
| |
| static int dsi_enable_ulps(struct dsi_ctrl *dsi_ctrl) |
| { |
| int rc = 0; |
| u32 lanes = 0; |
| u32 ulps_lanes; |
| |
| if (dsi_ctrl->host_config.panel_mode == DSI_OP_CMD_MODE) |
| lanes = dsi_ctrl->host_config.common_config.data_lanes; |
| |
| rc = dsi_ctrl->hw.ops.wait_for_lane_idle(&dsi_ctrl->hw, lanes); |
| if (rc) { |
| pr_err("lanes not entering idle, skip ULPS\n"); |
| return rc; |
| } |
| |
| if (!dsi_ctrl->hw.ops.ulps_ops.ulps_request || |
| !dsi_ctrl->hw.ops.ulps_ops.ulps_exit) { |
| pr_debug("DSI controller ULPS ops not present\n"); |
| return 0; |
| } |
| |
| lanes |= DSI_CLOCK_LANE; |
| dsi_ctrl->hw.ops.ulps_ops.ulps_request(&dsi_ctrl->hw, lanes); |
| |
| ulps_lanes = dsi_ctrl->hw.ops.ulps_ops.get_lanes_in_ulps(&dsi_ctrl->hw); |
| |
| if ((lanes & ulps_lanes) != lanes) { |
| pr_err("Failed to enter ULPS, request=0x%x, actual=0x%x\n", |
| lanes, ulps_lanes); |
| rc = -EIO; |
| } |
| |
| return rc; |
| } |
| |
| static int dsi_disable_ulps(struct dsi_ctrl *dsi_ctrl) |
| { |
| int rc = 0; |
| u32 ulps_lanes, lanes = 0; |
| |
| dsi_ctrl->hw.ops.clear_phy0_ln_err(&dsi_ctrl->hw); |
| |
| if (!dsi_ctrl->hw.ops.ulps_ops.ulps_request || |
| !dsi_ctrl->hw.ops.ulps_ops.ulps_exit) { |
| pr_debug("DSI controller ULPS ops not present\n"); |
| return 0; |
| } |
| |
| if (dsi_ctrl->host_config.panel_mode == DSI_OP_CMD_MODE) |
| lanes = dsi_ctrl->host_config.common_config.data_lanes; |
| |
| lanes |= DSI_CLOCK_LANE; |
| |
| ulps_lanes = dsi_ctrl->hw.ops.ulps_ops.get_lanes_in_ulps(&dsi_ctrl->hw); |
| |
| if ((lanes & ulps_lanes) != lanes) |
| pr_err("Mismatch between lanes in ULPS\n"); |
| |
| lanes &= ulps_lanes; |
| |
| dsi_ctrl->hw.ops.ulps_ops.ulps_exit(&dsi_ctrl->hw, lanes); |
| |
| ulps_lanes = dsi_ctrl->hw.ops.ulps_ops.get_lanes_in_ulps(&dsi_ctrl->hw); |
| if (ulps_lanes & lanes) { |
| pr_err("Lanes (0x%x) stuck in ULPS\n", ulps_lanes); |
| rc = -EIO; |
| } |
| |
| return rc; |
| } |
| |
| static int dsi_ctrl_drv_state_init(struct dsi_ctrl *dsi_ctrl) |
| { |
| int rc = 0; |
| bool splash_enabled = false; |
| struct dsi_ctrl_state_info *state = &dsi_ctrl->current_state; |
| |
| if (!splash_enabled) { |
| state->power_state = DSI_CTRL_POWER_VREG_OFF; |
| state->cmd_engine_state = DSI_CTRL_ENGINE_OFF; |
| state->vid_engine_state = DSI_CTRL_ENGINE_OFF; |
| } |
| |
| return rc; |
| } |
| |
| int dsi_ctrl_intr_deinit(struct dsi_ctrl *dsi_ctrl) |
| { |
| struct dsi_ctrl_interrupts *ints = &dsi_ctrl->int_info; |
| |
| devm_free_irq(&dsi_ctrl->pdev->dev, ints->irq, dsi_ctrl); |
| |
| return 0; |
| } |
| |
| static int dsi_ctrl_buffer_deinit(struct dsi_ctrl *dsi_ctrl) |
| { |
| if (dsi_ctrl->tx_cmd_buf) { |
| msm_gem_put_iova(dsi_ctrl->tx_cmd_buf, 0); |
| |
| msm_gem_free_object(dsi_ctrl->tx_cmd_buf); |
| dsi_ctrl->tx_cmd_buf = NULL; |
| } |
| |
| return 0; |
| } |
| |
| int dsi_ctrl_buffer_init(struct dsi_ctrl *dsi_ctrl) |
| { |
| int rc = 0; |
| u32 iova = 0; |
| |
| dsi_ctrl->tx_cmd_buf = msm_gem_new(dsi_ctrl->drm_dev, |
| SZ_4K, |
| MSM_BO_UNCACHED); |
| |
| if (IS_ERR(dsi_ctrl->tx_cmd_buf)) { |
| rc = PTR_ERR(dsi_ctrl->tx_cmd_buf); |
| pr_err("failed to allocate gem, rc=%d\n", rc); |
| dsi_ctrl->tx_cmd_buf = NULL; |
| goto error; |
| } |
| |
| dsi_ctrl->cmd_buffer_size = SZ_4K; |
| |
| rc = msm_gem_get_iova(dsi_ctrl->tx_cmd_buf, 0, &iova); |
| if (rc) { |
| pr_err("failed to get iova, rc=%d\n", rc); |
| (void)dsi_ctrl_buffer_deinit(dsi_ctrl); |
| goto error; |
| } |
| |
| if (iova & 0x07) { |
| pr_err("Tx command buffer is not 8 byte aligned\n"); |
| rc = -ENOTSUPP; |
| (void)dsi_ctrl_buffer_deinit(dsi_ctrl); |
| goto error; |
| } |
| error: |
| return rc; |
| } |
| |
| static int dsi_enable_io_clamp(struct dsi_ctrl *dsi_ctrl, |
| bool enable, bool ulps_enabled) |
| { |
| u32 lanes = 0; |
| |
| if (dsi_ctrl->host_config.panel_mode == DSI_OP_CMD_MODE) |
| lanes = dsi_ctrl->host_config.common_config.data_lanes; |
| |
| lanes |= DSI_CLOCK_LANE; |
| |
| if (enable) |
| dsi_ctrl->hw.ops.clamp_enable(&dsi_ctrl->hw, |
| lanes, ulps_enabled); |
| else |
| dsi_ctrl->hw.ops.clamp_disable(&dsi_ctrl->hw, |
| lanes, ulps_enabled); |
| |
| return 0; |
| } |
| |
| static int dsi_ctrl_dev_probe(struct platform_device *pdev) |
| { |
| struct dsi_ctrl *dsi_ctrl; |
| struct dsi_ctrl_list_item *item; |
| const struct of_device_id *id; |
| enum dsi_ctrl_version version; |
| u32 index = 0; |
| int rc = 0; |
| |
| id = of_match_node(msm_dsi_of_match, pdev->dev.of_node); |
| if (!id) |
| return -ENODEV; |
| |
| version = *(enum dsi_ctrl_version *)id->data; |
| |
| item = devm_kzalloc(&pdev->dev, sizeof(*item), GFP_KERNEL); |
| if (!item) |
| return -ENOMEM; |
| |
| dsi_ctrl = devm_kzalloc(&pdev->dev, sizeof(*dsi_ctrl), GFP_KERNEL); |
| if (!dsi_ctrl) |
| return -ENOMEM; |
| |
| rc = of_property_read_u32(pdev->dev.of_node, "cell-index", &index); |
| if (rc) { |
| pr_debug("cell index not set, default to 0\n"); |
| index = 0; |
| } |
| |
| dsi_ctrl->cell_index = index; |
| |
| dsi_ctrl->name = of_get_property(pdev->dev.of_node, "label", NULL); |
| if (!dsi_ctrl->name) |
| dsi_ctrl->name = DSI_CTRL_DEFAULT_LABEL; |
| |
| rc = dsi_ctrl_init_regmap(pdev, dsi_ctrl); |
| if (rc) { |
| pr_err("Failed to parse register information, rc = %d\n", rc); |
| goto fail; |
| } |
| |
| rc = dsi_ctrl_clocks_init(pdev, dsi_ctrl); |
| if (rc) { |
| pr_err("Failed to parse clock information, rc = %d\n", rc); |
| goto fail; |
| } |
| |
| rc = dsi_ctrl_supplies_init(pdev, dsi_ctrl); |
| if (rc) { |
| pr_err("Failed to parse voltage supplies, rc = %d\n", rc); |
| goto fail_clks; |
| } |
| |
| dsi_ctrl->version = version; |
| rc = dsi_catalog_ctrl_setup(&dsi_ctrl->hw, dsi_ctrl->version, |
| dsi_ctrl->cell_index); |
| if (rc) { |
| pr_err("Catalog does not support version (%d)\n", |
| dsi_ctrl->version); |
| goto fail_supplies; |
| } |
| |
| rc = dsi_ctrl_axi_bus_client_init(pdev, dsi_ctrl); |
| if (rc) |
| pr_err("failed to init axi bus client, rc = %d\n", rc); |
| |
| item->ctrl = dsi_ctrl; |
| |
| mutex_lock(&dsi_ctrl_list_lock); |
| list_add(&item->list, &dsi_ctrl_list); |
| mutex_unlock(&dsi_ctrl_list_lock); |
| |
| mutex_init(&dsi_ctrl->ctrl_lock); |
| |
| dsi_ctrl->pdev = pdev; |
| platform_set_drvdata(pdev, dsi_ctrl); |
| |
| pr_debug("Probe successful for %s\n", dsi_ctrl->name); |
| |
| return 0; |
| |
| fail_supplies: |
| (void)dsi_ctrl_supplies_deinit(dsi_ctrl); |
| fail_clks: |
| (void)dsi_ctrl_clocks_deinit(dsi_ctrl); |
| fail: |
| return rc; |
| } |
| |
| static int dsi_ctrl_dev_remove(struct platform_device *pdev) |
| { |
| int rc = 0; |
| struct dsi_ctrl *dsi_ctrl; |
| struct list_head *pos, *tmp; |
| |
| dsi_ctrl = platform_get_drvdata(pdev); |
| |
| mutex_lock(&dsi_ctrl_list_lock); |
| list_for_each_safe(pos, tmp, &dsi_ctrl_list) { |
| struct dsi_ctrl_list_item *n = list_entry(pos, |
| struct dsi_ctrl_list_item, |
| list); |
| if (n->ctrl == dsi_ctrl) { |
| list_del(&n->list); |
| break; |
| } |
| } |
| mutex_unlock(&dsi_ctrl_list_lock); |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| rc = dsi_ctrl_axi_bus_client_deinit(dsi_ctrl); |
| if (rc) |
| pr_err("failed to deinitialize axi bus client, rc = %d\n", rc); |
| |
| rc = dsi_ctrl_supplies_deinit(dsi_ctrl); |
| if (rc) |
| pr_err("failed to deinitialize voltage supplies, rc=%d\n", rc); |
| |
| rc = dsi_ctrl_clocks_deinit(dsi_ctrl); |
| if (rc) |
| pr_err("failed to deinitialize clocks, rc=%d\n", rc); |
| |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| |
| mutex_destroy(&dsi_ctrl->ctrl_lock); |
| devm_kfree(&pdev->dev, dsi_ctrl); |
| |
| platform_set_drvdata(pdev, NULL); |
| return 0; |
| } |
| |
| static struct platform_driver dsi_ctrl_driver = { |
| .probe = dsi_ctrl_dev_probe, |
| .remove = dsi_ctrl_dev_remove, |
| .driver = { |
| .name = "drm_dsi_ctrl", |
| .of_match_table = msm_dsi_of_match, |
| }, |
| }; |
| |
| /** |
| * dsi_ctrl_get() - get a dsi_ctrl handle from an of_node |
| * @of_node: of_node of the DSI controller. |
| * |
| * Gets the DSI controller handle for the corresponding of_node. The ref count |
| * is incremented to one and all subsequent gets will fail until the original |
| * clients calls a put. |
| * |
| * Return: DSI Controller handle. |
| */ |
| struct dsi_ctrl *dsi_ctrl_get(struct device_node *of_node) |
| { |
| struct list_head *pos, *tmp; |
| struct dsi_ctrl *ctrl = NULL; |
| |
| mutex_lock(&dsi_ctrl_list_lock); |
| list_for_each_safe(pos, tmp, &dsi_ctrl_list) { |
| struct dsi_ctrl_list_item *n; |
| |
| n = list_entry(pos, struct dsi_ctrl_list_item, list); |
| if (n->ctrl->pdev->dev.of_node == of_node) { |
| ctrl = n->ctrl; |
| break; |
| } |
| } |
| mutex_unlock(&dsi_ctrl_list_lock); |
| |
| if (!ctrl) { |
| pr_err("Device with of node not found\n"); |
| ctrl = ERR_PTR(-EPROBE_DEFER); |
| return ctrl; |
| } |
| |
| mutex_lock(&ctrl->ctrl_lock); |
| if (ctrl->refcount == 1) { |
| pr_err("[%s] Device in use\n", ctrl->name); |
| ctrl = ERR_PTR(-EBUSY); |
| } else { |
| ctrl->refcount++; |
| } |
| mutex_unlock(&ctrl->ctrl_lock); |
| return ctrl; |
| } |
| |
| /** |
| * dsi_ctrl_put() - releases a dsi controller handle. |
| * @dsi_ctrl: DSI controller handle. |
| * |
| * Releases the DSI controller. Driver will clean up all resources and puts back |
| * the DSI controller into reset state. |
| */ |
| void dsi_ctrl_put(struct dsi_ctrl *dsi_ctrl) |
| { |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| if (dsi_ctrl->refcount == 0) |
| pr_err("Unbalanced dsi_ctrl_put call\n"); |
| else |
| dsi_ctrl->refcount--; |
| |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| } |
| |
| /** |
| * dsi_ctrl_drv_init() - initialize dsi controller driver. |
| * @dsi_ctrl: DSI controller handle. |
| * @parent: Parent directory for debug fs. |
| * |
| * Initializes DSI controller driver. Driver should be initialized after |
| * dsi_ctrl_get() succeeds. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_drv_init(struct dsi_ctrl *dsi_ctrl, struct dentry *parent) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl || !parent) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| rc = dsi_ctrl_drv_state_init(dsi_ctrl); |
| if (rc) { |
| pr_err("Failed to initialize driver state, rc=%d\n", rc); |
| goto error; |
| } |
| |
| rc = dsi_ctrl_debugfs_init(dsi_ctrl, parent); |
| if (rc) { |
| pr_err("[DSI_%d] failed to init debug fs, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_drv_deinit() - de-initializes dsi controller driver |
| * @dsi_ctrl: DSI controller handle. |
| * |
| * Releases all resources acquired by dsi_ctrl_drv_init(). |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_drv_deinit(struct dsi_ctrl *dsi_ctrl) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_debugfs_deinit(dsi_ctrl); |
| if (rc) |
| pr_err("failed to release debugfs root, rc=%d\n", rc); |
| |
| rc = dsi_ctrl_buffer_deinit(dsi_ctrl); |
| if (rc) |
| pr_err("Failed to free cmd buffers, rc=%d\n", rc); |
| |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| int dsi_ctrl_clk_cb_register(struct dsi_ctrl *dsi_ctrl, |
| struct clk_ctrl_cb *clk_cb) |
| { |
| if (!dsi_ctrl || !clk_cb) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| dsi_ctrl->clk_cb.priv = clk_cb->priv; |
| dsi_ctrl->clk_cb.dsi_clk_cb = clk_cb->dsi_clk_cb; |
| return 0; |
| } |
| |
| /** |
| * dsi_ctrl_phy_sw_reset() - perform a PHY software reset |
| * @dsi_ctrl: DSI controller handle. |
| * |
| * Performs a PHY software reset on the DSI controller. Reset should be done |
| * when the controller power state is DSI_CTRL_POWER_CORE_CLK_ON and the PHY is |
| * not enabled. |
| * |
| * This function will fail if driver is in any other state. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_phy_sw_reset(struct dsi_ctrl *dsi_ctrl) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_PHY_SW_RESET, 0x0); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| dsi_ctrl->hw.ops.phy_sw_reset(&dsi_ctrl->hw); |
| |
| pr_debug("[DSI_%d] PHY soft reset done\n", dsi_ctrl->cell_index); |
| dsi_ctrl_update_state(dsi_ctrl, DSI_CTRL_OP_PHY_SW_RESET, 0x0); |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_seamless_timing_update() - update only controller timing |
| * @dsi_ctrl: DSI controller handle. |
| * @timing: New DSI timing info |
| * |
| * Updates host timing values to conduct a seamless transition to new timing |
| * For example, to update the porch values in a dynamic fps switch. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_async_timing_update(struct dsi_ctrl *dsi_ctrl, |
| struct dsi_mode_info *timing) |
| { |
| struct dsi_mode_info *host_mode; |
| int rc = 0; |
| |
| if (!dsi_ctrl || !timing) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_ASYNC_TIMING, |
| DSI_CTRL_ENGINE_ON); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto exit; |
| } |
| |
| host_mode = &dsi_ctrl->host_config.video_timing; |
| memcpy(host_mode, timing, sizeof(*host_mode)); |
| |
| dsi_ctrl->hw.ops.set_video_timing(&dsi_ctrl->hw, host_mode); |
| |
| exit: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_setup() - Setup DSI host hardware while coming out of idle screen. |
| * @dsi_ctrl: DSI controller handle. |
| * |
| * Initializes DSI controller hardware with host configuration provided by |
| * dsi_ctrl_update_host_config(). Initialization can be performed only during |
| * DSI_CTRL_POWER_CORE_CLK_ON state and after the PHY SW reset has been |
| * performed. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_setup(struct dsi_ctrl *dsi_ctrl) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| dsi_ctrl->hw.ops.setup_lane_map(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.lane_map); |
| |
| dsi_ctrl->hw.ops.host_setup(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.common_config); |
| |
| if (dsi_ctrl->host_config.panel_mode == DSI_OP_CMD_MODE) { |
| dsi_ctrl->hw.ops.cmd_engine_setup(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.common_config, |
| &dsi_ctrl->host_config.u.cmd_engine); |
| |
| dsi_ctrl->hw.ops.setup_cmd_stream(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.video_timing, |
| dsi_ctrl->host_config.video_timing.h_active * 3, |
| 0x0); |
| dsi_ctrl->hw.ops.cmd_engine_en(&dsi_ctrl->hw, true); |
| } else { |
| dsi_ctrl->hw.ops.video_engine_setup(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.common_config, |
| &dsi_ctrl->host_config.u.video_engine); |
| dsi_ctrl->hw.ops.set_video_timing(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.video_timing); |
| dsi_ctrl->hw.ops.video_engine_en(&dsi_ctrl->hw, true); |
| } |
| |
| dsi_ctrl->hw.ops.enable_status_interrupts(&dsi_ctrl->hw, 0x0); |
| dsi_ctrl->hw.ops.enable_error_interrupts(&dsi_ctrl->hw, 0x0); |
| dsi_ctrl->hw.ops.ctrl_en(&dsi_ctrl->hw, true); |
| |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_phy_reset_config() - Mask/unmask propagation of ahb reset signal |
| * to DSI PHY hardware. |
| * @dsi_ctrl: DSI controller handle. |
| * @enable: Mask/unmask the PHY reset signal. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_phy_reset_config(struct dsi_ctrl *dsi_ctrl, bool enable) |
| { |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| if (dsi_ctrl->hw.ops.phy_reset_config) |
| dsi_ctrl->hw.ops.phy_reset_config(&dsi_ctrl->hw, enable); |
| |
| return 0; |
| } |
| |
| /** |
| * dsi_ctrl_host_init() - Initialize DSI host hardware. |
| * @dsi_ctrl: DSI controller handle. |
| * |
| * Initializes DSI controller hardware with host configuration provided by |
| * dsi_ctrl_update_host_config(). Initialization can be performed only during |
| * DSI_CTRL_POWER_CORE_CLK_ON state and after the PHY SW reset has been |
| * performed. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_host_init(struct dsi_ctrl *dsi_ctrl) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_HOST_INIT, 0x1); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| dsi_ctrl->hw.ops.setup_lane_map(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.lane_map); |
| |
| dsi_ctrl->hw.ops.host_setup(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.common_config); |
| |
| if (dsi_ctrl->host_config.panel_mode == DSI_OP_CMD_MODE) { |
| dsi_ctrl->hw.ops.cmd_engine_setup(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.common_config, |
| &dsi_ctrl->host_config.u.cmd_engine); |
| |
| dsi_ctrl->hw.ops.setup_cmd_stream(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.video_timing, |
| dsi_ctrl->host_config.video_timing.h_active * 3, |
| 0x0); |
| } else { |
| dsi_ctrl->hw.ops.video_engine_setup(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.common_config, |
| &dsi_ctrl->host_config.u.video_engine); |
| dsi_ctrl->hw.ops.set_video_timing(&dsi_ctrl->hw, |
| &dsi_ctrl->host_config.video_timing); |
| } |
| |
| |
| |
| dsi_ctrl->hw.ops.enable_status_interrupts(&dsi_ctrl->hw, 0x0); |
| dsi_ctrl->hw.ops.enable_error_interrupts(&dsi_ctrl->hw, 0x0); |
| |
| /* Perform a soft reset before enabling dsi controller */ |
| dsi_ctrl->hw.ops.soft_reset(&dsi_ctrl->hw); |
| pr_debug("[DSI_%d]Host initialization complete\n", |
| dsi_ctrl->cell_index); |
| dsi_ctrl_update_state(dsi_ctrl, DSI_CTRL_OP_HOST_INIT, 0x1); |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| int dsi_ctrl_soft_reset(struct dsi_ctrl *dsi_ctrl) |
| { |
| if (!dsi_ctrl) |
| return -EINVAL; |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| dsi_ctrl->hw.ops.soft_reset(&dsi_ctrl->hw); |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| |
| pr_debug("[DSI_%d]Soft reset complete\n", dsi_ctrl->cell_index); |
| return 0; |
| } |
| |
| /** |
| * dsi_ctrl_host_deinit() - De-Initialize DSI host hardware. |
| * @dsi_ctrl: DSI controller handle. |
| * |
| * De-initializes DSI controller hardware. It can be performed only during |
| * DSI_CTRL_POWER_CORE_CLK_ON state after LINK clocks have been turned off. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_host_deinit(struct dsi_ctrl *dsi_ctrl) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_HOST_INIT, 0x0); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| pr_err("driver state check failed, rc=%d\n", rc); |
| goto error; |
| } |
| |
| pr_debug("[DSI_%d] Host deinitization complete\n", |
| dsi_ctrl->cell_index); |
| dsi_ctrl_update_state(dsi_ctrl, DSI_CTRL_OP_HOST_INIT, 0x0); |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_update_host_config() - update dsi host configuration |
| * @dsi_ctrl: DSI controller handle. |
| * @config: DSI host configuration. |
| * @flags: dsi_mode_flags modifying the behavior |
| * |
| * Updates driver with new Host configuration to use for host initialization. |
| * This function call will only update the software context. The stored |
| * configuration information will be used when the host is initialized. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_update_host_config(struct dsi_ctrl *ctrl, |
| struct dsi_host_config *config, |
| int flags, void *clk_handle) |
| { |
| int rc = 0; |
| |
| if (!ctrl || !config) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_validate_panel_info(ctrl, config); |
| if (rc) { |
| pr_err("panel validation failed, rc=%d\n", rc); |
| goto error; |
| } |
| |
| if (!(flags & DSI_MODE_FLAG_SEAMLESS)) { |
| rc = dsi_ctrl_update_link_freqs(ctrl, config, clk_handle); |
| if (rc) { |
| pr_err("[%s] failed to update link frequencies, rc=%d\n", |
| ctrl->name, rc); |
| goto error; |
| } |
| } |
| |
| pr_debug("[DSI_%d]Host config updated\n", ctrl->cell_index); |
| memcpy(&ctrl->host_config, config, sizeof(ctrl->host_config)); |
| error: |
| mutex_unlock(&ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_validate_timing() - validate a video timing configuration |
| * @dsi_ctrl: DSI controller handle. |
| * @timing: Pointer to timing data. |
| * |
| * Driver will validate if the timing configuration is supported on the |
| * controller hardware. |
| * |
| * Return: error code if timing is not supported. |
| */ |
| int dsi_ctrl_validate_timing(struct dsi_ctrl *dsi_ctrl, |
| struct dsi_mode_info *mode) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl || !mode) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_cmd_transfer() - Transfer commands on DSI link |
| * @dsi_ctrl: DSI controller handle. |
| * @msg: Message to transfer on DSI link. |
| * @flags: Modifiers for message transfer. |
| * |
| * Command transfer can be done only when command engine is enabled. The |
| * transfer API will block until either the command transfer finishes or |
| * the timeout value is reached. If the trigger is deferred, it will return |
| * without triggering the transfer. Command parameters are programmed to |
| * hardware. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_cmd_transfer(struct dsi_ctrl *dsi_ctrl, |
| const struct mipi_dsi_msg *msg, |
| u32 flags) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl || !msg) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_CMD_TX, 0x0); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| if (flags & DSI_CTRL_CMD_READ) { |
| rc = dsi_message_rx(dsi_ctrl, msg, flags); |
| if (rc) |
| pr_err("read message failed, rc=%d\n", rc); |
| } else { |
| rc = dsi_message_tx(dsi_ctrl, msg, flags); |
| if (rc) |
| pr_err("command msg transfer failed, rc = %d\n", rc); |
| } |
| |
| dsi_ctrl_update_state(dsi_ctrl, DSI_CTRL_OP_CMD_TX, 0x0); |
| |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_cmd_tx_trigger() - Trigger a deferred command. |
| * @dsi_ctrl: DSI controller handle. |
| * @flags: Modifiers. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_cmd_tx_trigger(struct dsi_ctrl *dsi_ctrl, u32 flags) |
| { |
| int rc = 0; |
| u32 status = 0; |
| u32 mask = (DSI_CMD_MODE_DMA_DONE); |
| |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| reinit_completion(&dsi_ctrl->int_info.cmd_dma_done); |
| |
| dsi_ctrl->hw.ops.trigger_command_dma(&dsi_ctrl->hw); |
| |
| if ((flags & DSI_CTRL_CMD_BROADCAST) && |
| (flags & DSI_CTRL_CMD_BROADCAST_MASTER)) { |
| u32 retry = 10; |
| |
| while ((status == 0) && (retry > 0)) { |
| udelay(1000); |
| status = dsi_ctrl->hw.ops.get_interrupt_status( |
| &dsi_ctrl->hw); |
| status &= mask; |
| retry--; |
| dsi_ctrl->hw.ops.clear_interrupt_status(&dsi_ctrl->hw, |
| status); |
| } |
| pr_debug("INT STATUS = %x, retry = %d\n", status, retry); |
| if (retry == 0) |
| pr_err("[DSI_%d]Command transfer failed\n", |
| dsi_ctrl->cell_index); |
| } |
| |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_set_power_state() - set power state for dsi controller |
| * @dsi_ctrl: DSI controller handle. |
| * @state: Power state. |
| * |
| * Set power state for DSI controller. Power state can be changed only when |
| * Controller, Video and Command engines are turned off. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_set_power_state(struct dsi_ctrl *dsi_ctrl, |
| enum dsi_power_state state) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl || (state >= DSI_CTRL_POWER_MAX)) { |
| pr_err("Invalid Params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_POWER_STATE_CHANGE, |
| state); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| if (state == DSI_CTRL_POWER_VREG_ON) { |
| rc = dsi_ctrl_enable_supplies(dsi_ctrl, true); |
| if (rc) { |
| pr_err("[%d]failed to enable voltage supplies, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| } else if (state == DSI_CTRL_POWER_VREG_OFF) { |
| rc = dsi_ctrl_enable_supplies(dsi_ctrl, false); |
| if (rc) { |
| pr_err("[%d]failed to disable vreg supplies, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| } |
| |
| pr_debug("[DSI_%d] Power state updated to %d\n", dsi_ctrl->cell_index, |
| state); |
| dsi_ctrl_update_state(dsi_ctrl, DSI_CTRL_OP_POWER_STATE_CHANGE, state); |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_set_tpg_state() - enable/disable test pattern on the controller |
| * @dsi_ctrl: DSI controller handle. |
| * @on: enable/disable test pattern. |
| * |
| * Test pattern can be enabled only after Video engine (for video mode panels) |
| * or command engine (for cmd mode panels) is enabled. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_set_tpg_state(struct dsi_ctrl *dsi_ctrl, bool on) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_TPG, on); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| if (on) { |
| if (dsi_ctrl->host_config.panel_mode == DSI_OP_VIDEO_MODE) { |
| dsi_ctrl->hw.ops.video_test_pattern_setup(&dsi_ctrl->hw, |
| DSI_TEST_PATTERN_INC, |
| 0xFFFF); |
| } else { |
| dsi_ctrl->hw.ops.cmd_test_pattern_setup( |
| &dsi_ctrl->hw, |
| DSI_TEST_PATTERN_INC, |
| 0xFFFF, |
| 0x0); |
| } |
| } |
| dsi_ctrl->hw.ops.test_pattern_enable(&dsi_ctrl->hw, on); |
| |
| pr_debug("[DSI_%d]Set test pattern state=%d\n", |
| dsi_ctrl->cell_index, on); |
| dsi_ctrl_update_state(dsi_ctrl, DSI_CTRL_OP_TPG, on); |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_set_host_engine_state() - set host engine state |
| * @dsi_ctrl: DSI Controller handle. |
| * @state: Engine state. |
| * |
| * Host engine state can be modified only when DSI controller power state is |
| * set to DSI_CTRL_POWER_LINK_CLK_ON and cmd, video engines are disabled. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_set_host_engine_state(struct dsi_ctrl *dsi_ctrl, |
| enum dsi_engine_state state) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl || (state >= DSI_CTRL_ENGINE_MAX)) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_HOST_ENGINE, state); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| if (state == DSI_CTRL_ENGINE_ON) |
| dsi_ctrl->hw.ops.ctrl_en(&dsi_ctrl->hw, true); |
| else |
| dsi_ctrl->hw.ops.ctrl_en(&dsi_ctrl->hw, false); |
| |
| pr_debug("[DSI_%d] Set host engine state = %d\n", dsi_ctrl->cell_index, |
| state); |
| dsi_ctrl_update_state(dsi_ctrl, DSI_CTRL_OP_HOST_ENGINE, state); |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_set_cmd_engine_state() - set command engine state |
| * @dsi_ctrl: DSI Controller handle. |
| * @state: Engine state. |
| * |
| * Command engine state can be modified only when DSI controller power state is |
| * set to DSI_CTRL_POWER_LINK_CLK_ON. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_set_cmd_engine_state(struct dsi_ctrl *dsi_ctrl, |
| enum dsi_engine_state state) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl || (state >= DSI_CTRL_ENGINE_MAX)) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_CMD_ENGINE, state); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| if (state == DSI_CTRL_ENGINE_ON) |
| dsi_ctrl->hw.ops.cmd_engine_en(&dsi_ctrl->hw, true); |
| else |
| dsi_ctrl->hw.ops.cmd_engine_en(&dsi_ctrl->hw, false); |
| |
| pr_debug("[DSI_%d] Set cmd engine state = %d\n", dsi_ctrl->cell_index, |
| state); |
| dsi_ctrl_update_state(dsi_ctrl, DSI_CTRL_OP_CMD_ENGINE, state); |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_set_vid_engine_state() - set video engine state |
| * @dsi_ctrl: DSI Controller handle. |
| * @state: Engine state. |
| * |
| * Video engine state can be modified only when DSI controller power state is |
| * set to DSI_CTRL_POWER_LINK_CLK_ON. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_set_vid_engine_state(struct dsi_ctrl *dsi_ctrl, |
| enum dsi_engine_state state) |
| { |
| int rc = 0; |
| bool on; |
| |
| if (!dsi_ctrl || (state >= DSI_CTRL_ENGINE_MAX)) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_ctrl_check_state(dsi_ctrl, DSI_CTRL_OP_VID_ENGINE, state); |
| if (rc) { |
| pr_err("[DSI_%d] Controller state check failed, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| goto error; |
| } |
| |
| on = (state == DSI_CTRL_ENGINE_ON) ? true : false; |
| dsi_ctrl->hw.ops.video_engine_en(&dsi_ctrl->hw, on); |
| |
| /* perform a reset when turning off video engine */ |
| if (!on) |
| dsi_ctrl->hw.ops.soft_reset(&dsi_ctrl->hw); |
| |
| pr_debug("[DSI_%d] Set video engine state = %d\n", dsi_ctrl->cell_index, |
| state); |
| dsi_ctrl_update_state(dsi_ctrl, DSI_CTRL_OP_VID_ENGINE, state); |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_set_ulps() - set ULPS state for DSI lanes. |
| * @dsi_ctrl: DSI controller handle. |
| * @enable: enable/disable ULPS. |
| * |
| * ULPS can be enabled/disabled after DSI host engine is turned on. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_set_ulps(struct dsi_ctrl *dsi_ctrl, bool enable) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| if (enable) |
| rc = dsi_enable_ulps(dsi_ctrl); |
| else |
| rc = dsi_disable_ulps(dsi_ctrl); |
| |
| if (rc) { |
| pr_err("[DSI_%d] Ulps state change(%d) failed, rc=%d\n", |
| dsi_ctrl->cell_index, enable, rc); |
| goto error; |
| } |
| pr_debug("[DSI_%d] ULPS state = %d\n", dsi_ctrl->cell_index, enable); |
| |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_set_clamp_state() - set clamp state for DSI phy |
| * @dsi_ctrl: DSI controller handle. |
| * @enable: enable/disable clamping. |
| * |
| * Clamps can be enabled/disabled while DSI contoller is still turned on. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_set_clamp_state(struct dsi_ctrl *dsi_ctrl, |
| bool enable, bool ulps_enabled) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| if (!dsi_ctrl->hw.ops.clamp_enable || |
| !dsi_ctrl->hw.ops.clamp_disable) { |
| pr_debug("No clamp control for DSI controller\n"); |
| return 0; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_enable_io_clamp(dsi_ctrl, enable, ulps_enabled); |
| if (rc) { |
| pr_err("[DSI_%d] Failed to enable IO clamp\n", |
| dsi_ctrl->cell_index); |
| goto error; |
| } |
| |
| pr_debug("[DSI_%d] Clamp state = %d\n", dsi_ctrl->cell_index, enable); |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_set_clock_source() - set clock source fpr dsi link clocks |
| * @dsi_ctrl: DSI controller handle. |
| * @source_clks: Source clocks for DSI link clocks. |
| * |
| * Clock source should be changed while link clocks are disabled. |
| * |
| * Return: error code. |
| */ |
| int dsi_ctrl_set_clock_source(struct dsi_ctrl *dsi_ctrl, |
| struct dsi_clk_link_set *source_clks) |
| { |
| int rc = 0; |
| |
| if (!dsi_ctrl || !source_clks) { |
| pr_err("Invalid params\n"); |
| return -EINVAL; |
| } |
| |
| mutex_lock(&dsi_ctrl->ctrl_lock); |
| |
| rc = dsi_clk_update_parent(source_clks, &dsi_ctrl->clk_info.rcg_clks); |
| if (rc) { |
| pr_err("[DSI_%d]Failed to update link clk parent, rc=%d\n", |
| dsi_ctrl->cell_index, rc); |
| (void)dsi_clk_update_parent(&dsi_ctrl->clk_info.pll_op_clks, |
| &dsi_ctrl->clk_info.rcg_clks); |
| goto error; |
| } |
| |
| dsi_ctrl->clk_info.pll_op_clks.byte_clk = source_clks->byte_clk; |
| dsi_ctrl->clk_info.pll_op_clks.pixel_clk = source_clks->pixel_clk; |
| |
| pr_debug("[DSI_%d] Source clocks are updated\n", dsi_ctrl->cell_index); |
| |
| error: |
| mutex_unlock(&dsi_ctrl->ctrl_lock); |
| return rc; |
| } |
| |
| /** |
| * dsi_ctrl_drv_register() - register platform driver for dsi controller |
| */ |
| void dsi_ctrl_drv_register(void) |
| { |
| platform_driver_register(&dsi_ctrl_driver); |
| } |
| |
| /** |
| * dsi_ctrl_drv_unregister() - unregister platform driver |
| */ |
| void dsi_ctrl_drv_unregister(void) |
| { |
| platform_driver_unregister(&dsi_ctrl_driver); |
| } |