[PATCH] drm/msm: Initial add eDP support in msm drm driver (V4)

This change adds a new eDP connector in msm drm driver. With this change, eDP panel can work with msm platform under drm framework.

V1: Initial change

V2: Address Rob's comments Use generated header file for register definitions Change to devm_* APIs

V3: Address Thierry's comments and rebase on top of atomic changes Remove edp_bridge_mode_fixup Remove backlight control code and rely on pwm-backlight Remove continuous splash screen support for now Change to gpiod_* APIs

V4: Fix kbuild test issue

Signed-off-by: Hai Li hali@codeaurora.org --- drivers/gpu/drm/msm/Makefile | 6 + drivers/gpu/drm/msm/edp/edp.c | 208 +++++ drivers/gpu/drm/msm/edp/edp.h | 84 ++ drivers/gpu/drm/msm/edp/edp_aux.c | 268 ++++++ drivers/gpu/drm/msm/edp/edp_bridge.c | 124 +++ drivers/gpu/drm/msm/edp/edp_connector.c | 161 ++++ drivers/gpu/drm/msm/edp/edp_ctrl.c | 1390 +++++++++++++++++++++++++++++++ drivers/gpu/drm/msm/edp/edp_phy.c | 106 +++ drivers/gpu/drm/msm/msm_drv.h | 6 + 9 files changed, 2353 insertions(+) create mode 100644 drivers/gpu/drm/msm/edp/edp.c create mode 100644 drivers/gpu/drm/msm/edp/edp.h create mode 100644 drivers/gpu/drm/msm/edp/edp_aux.c create mode 100644 drivers/gpu/drm/msm/edp/edp_bridge.c create mode 100644 drivers/gpu/drm/msm/edp/edp_connector.c create mode 100644 drivers/gpu/drm/msm/edp/edp_ctrl.c create mode 100644 drivers/gpu/drm/msm/edp/edp_phy.c

diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 143d988..e5464a0 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -16,6 +16,12 @@ msm-y := \ hdmi/hdmi_phy_8960.o \ hdmi/hdmi_phy_8x60.o \ hdmi/hdmi_phy_8x74.o \ + edp/edp.o \ + edp/edp_aux.o \ + edp/edp_bridge.o \ + edp/edp_connector.o \ + edp/edp_ctrl.o \ + edp/edp_phy.o \ mdp/mdp_format.o \ mdp/mdp_kms.o \ mdp/mdp4/mdp4_crtc.o \ diff --git a/drivers/gpu/drm/msm/edp/edp.c b/drivers/gpu/drm/msm/edp/edp.c new file mode 100644 index 0000000..5ca2d46 --- /dev/null +++ b/drivers/gpu/drm/msm/edp/edp.c @@ -0,0 +1,208 @@ +/* + * Copyright (c) 2014-2015, 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/of_irq.h> +#include "edp.h" + +static irqreturn_t edp_irq(int irq, void *dev_id) +{ + struct msm_edp *edp = dev_id; + + /* Process eDP irq */ + return msm_edp_ctrl_irq(edp->ctrl); +} + +static void edp_destroy(struct platform_device *pdev) +{ + struct msm_edp *edp = platform_get_drvdata(pdev); + + if (!edp) + return; + + if (edp->ctrl) { + msm_edp_ctrl_destroy(edp->ctrl); + edp->ctrl = NULL; + } + + platform_set_drvdata(pdev, NULL); +} + +/* construct eDP at bind/probe time, grab all the resources. */ +static struct msm_edp *edp_init(struct platform_device *pdev) +{ + struct msm_edp *edp = NULL; + int ret; + + if (!pdev) { + pr_err("no eDP device\n"); + ret = -ENXIO; + goto fail; + } + + edp = devm_kzalloc(&pdev->dev, sizeof(*edp), GFP_KERNEL); + if (!edp) { + ret = -ENOMEM; + goto fail; + } + DBG("eDP probed=%p", edp); + + edp->pdev = pdev; + platform_set_drvdata(pdev, edp); + + ret = msm_edp_ctrl_init(edp); + if (ret) + goto fail; + + return edp; + +fail: + if (edp) + edp_destroy(pdev); + + return ERR_PTR(ret); +} + +static int edp_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 msm_edp *edp; + + DBG(""); + edp = edp_init(to_platform_device(dev)); + if (IS_ERR(edp)) + return PTR_ERR(edp); + priv->edp = edp; + + return 0; +} + +static void edp_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; + + DBG(""); + if (priv->edp) { + edp_destroy(to_platform_device(dev)); + priv->edp = NULL; + } +} + +static const struct component_ops edp_ops = { + .bind = edp_bind, + .unbind = edp_unbind, +}; + +static int edp_dev_probe(struct platform_device *pdev) +{ + DBG(""); + return component_add(&pdev->dev, &edp_ops); +} + +static int edp_dev_remove(struct platform_device *pdev) +{ + DBG(""); + component_del(&pdev->dev, &edp_ops); + return 0; +} + +static const struct of_device_id dt_match[] = { + { .compatible = "qcom,mdss-edp" }, + {} +}; + +static struct platform_driver edp_driver = { + .probe = edp_dev_probe, + .remove = edp_dev_remove, + .driver = { + .name = "msm_edp", + .of_match_table = dt_match, + }, +}; + +void __init msm_edp_register(void) +{ + DBG(""); + platform_driver_register(&edp_driver); +} + +void __exit msm_edp_unregister(void) +{ + DBG(""); + platform_driver_unregister(&edp_driver); +} + +/* Second part of initialization, the drm/kms level modeset_init */ +int msm_edp_modeset_init(struct msm_edp *edp, struct drm_device *dev, + struct drm_encoder *encoder) +{ + struct platform_device *pdev = edp->pdev; + struct msm_drm_private *priv = dev->dev_private; + int ret; + + edp->encoder = encoder; + edp->dev = dev; + + edp->bridge = msm_edp_bridge_init(edp); + if (IS_ERR(edp->bridge)) { + ret = PTR_ERR(edp->bridge); + dev_err(dev->dev, "failed to create eDP bridge: %d\n", ret); + edp->bridge = NULL; + goto fail; + } + + edp->connector = msm_edp_connector_init(edp); + if (IS_ERR(edp->connector)) { + ret = PTR_ERR(edp->connector); + dev_err(dev->dev, "failed to create eDP connector: %d\n", ret); + edp->connector = NULL; + goto fail; + } + + edp->irq = irq_of_parse_and_map(pdev->dev.of_node, 0); + if (edp->irq < 0) { + ret = edp->irq; + dev_err(dev->dev, "failed to get IRQ: %d\n", ret); + goto fail; + } + + ret = devm_request_irq(&pdev->dev, edp->irq, + edp_irq, IRQF_TRIGGER_HIGH | IRQF_ONESHOT, + "edp_isr", edp); + if (ret < 0) { + dev_err(dev->dev, "failed to request IRQ%u: %d\n", + edp->irq, ret); + goto fail; + } + + encoder->bridge = edp->bridge; + + priv->bridges[priv->num_bridges++] = edp->bridge; + priv->connectors[priv->num_connectors++] = edp->connector; + + return 0; + +fail: + /* bridge/connector are normally destroyed by drm */ + if (edp->bridge) { + edp->bridge->funcs->destroy(edp->bridge); + edp->bridge = NULL; + } + if (edp->connector) { + edp->connector->funcs->destroy(edp->connector); + edp->connector = NULL; + } + + return ret; +} diff --git a/drivers/gpu/drm/msm/edp/edp.h b/drivers/gpu/drm/msm/edp/edp.h new file mode 100644 index 0000000..3ef1534 --- /dev/null +++ b/drivers/gpu/drm/msm/edp/edp.h @@ -0,0 +1,84 @@ +/* + * Copyright (c) 2014-2015, 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 __EDP_CONNECTOR_H__ +#define __EDP_CONNECTOR_H__ + +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/kernel.h> +#include <linux/platform_device.h> + +#include "drm_crtc.h" +#include "drm_dp_helper.h" +#include "msm_drv.h" + +#define edp_read(offset) msm_readl((offset)) +#define edp_write(offset, data) msm_writel((data), (offset)) + +struct edp_ctrl; +struct edp_aux; +struct edp_phy; + +struct msm_edp { + struct drm_device *dev; + struct platform_device *pdev; + + struct drm_connector *connector; + struct drm_bridge *bridge; + + /* the encoder we are hooked to (outside of eDP block) */ + struct drm_encoder *encoder; + + struct edp_ctrl *ctrl; + + int irq; +}; + +/* eDP bridge */ +struct drm_bridge *msm_edp_bridge_init(struct msm_edp *edp); + +/* eDP connector */ +struct drm_connector *msm_edp_connector_init(struct msm_edp *edp); + +/* AUX */ +void *msm_edp_aux_init(struct device *dev, void __iomem *regbase, + struct drm_dp_aux **drm_aux); +void msm_edp_aux_destroy(struct device *dev, struct edp_aux *aux); +irqreturn_t msm_edp_aux_irq(struct edp_aux *aux, u32 isr); +void msm_edp_aux_ctrl(struct edp_aux *aux, int enable); + +/* Phy */ +bool msm_edp_phy_ready(struct edp_phy *phy); +void msm_edp_phy_ctrl(struct edp_phy *phy, int enable); +void msm_edp_phy_vm_pe_init(struct edp_phy *phy); +void msm_edp_phy_vm_pe_cfg(struct edp_phy *phy, u32 v0, u32 v1); +void msm_edp_phy_lane_power_ctrl(struct edp_phy *phy, bool up, u32 max_lane); +void *msm_edp_phy_init(struct device *dev, void __iomem *regbase); + +/* Ctrl */ +irqreturn_t msm_edp_ctrl_irq(struct edp_ctrl *ctrl); +void msm_edp_ctrl_power(struct edp_ctrl *ctrl, bool on); +int msm_edp_ctrl_init(struct msm_edp *edp); +void msm_edp_ctrl_destroy(struct edp_ctrl *ctrl); +bool msm_edp_ctrl_panel_connected(struct edp_ctrl *ctrl); +int msm_edp_ctrl_get_panel_info(struct edp_ctrl *ctrl, + struct drm_connector *connector, struct edid **edid); +int msm_edp_ctrl_timing_cfg(struct edp_ctrl *ctrl, + const struct drm_display_mode *mode, + const struct drm_display_info *info); +/* @pixel_rate is in kHz */ +bool msm_edp_ctrl_pixel_clock_valid(struct edp_ctrl *ctrl, + u32 pixel_rate, u32 *pm, u32 *pn); + +#endif /* __EDP_CONNECTOR_H__ */ diff --git a/drivers/gpu/drm/msm/edp/edp_aux.c b/drivers/gpu/drm/msm/edp/edp_aux.c new file mode 100644 index 0000000..5f5a84f --- /dev/null +++ b/drivers/gpu/drm/msm/edp/edp_aux.c @@ -0,0 +1,268 @@ +/* + * Copyright (c) 2014-2015, 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 "edp.h" +#include "edp.xml.h" + +#define AUX_CMD_FIFO_LEN 144 +#define AUX_CMD_NATIVE_MAX 16 +#define AUX_CMD_I2C_MAX 128 + +#define EDP_INTR_AUX_I2C_ERR \ + (EDP_INTERRUPT_REG_1_WRONG_ADDR | EDP_INTERRUPT_REG_1_TIMEOUT | \ + EDP_INTERRUPT_REG_1_NACK_DEFER | EDP_INTERRUPT_REG_1_WRONG_DATA_CNT | \ + EDP_INTERRUPT_REG_1_I2C_NACK | EDP_INTERRUPT_REG_1_I2C_DEFER) +#define EDP_INTR_TRANS_STATUS \ + (EDP_INTERRUPT_REG_1_AUX_I2C_DONE | EDP_INTR_AUX_I2C_ERR) + +struct edp_aux { + void __iomem *base; + bool msg_err; + + struct completion msg_comp; + + /* To prevent the message transaction routine from reentry. */ + struct mutex msg_mutex; + + struct drm_dp_aux drm_aux; +}; +#define to_edp_aux(x) container_of(x, struct edp_aux, drm_aux) + +static int edp_msg_fifo_tx(struct edp_aux *aux, struct drm_dp_aux_msg *msg) +{ + u32 data[4]; + u32 reg, len; + bool native = msg->request & (DP_AUX_NATIVE_WRITE & DP_AUX_NATIVE_READ); + bool read = msg->request & (DP_AUX_I2C_READ & DP_AUX_NATIVE_READ); + u8 *msgdata = msg->buffer; + int i; + + if (read) + len = 4; + else + len = msg->size + 4; + + /* + * cmd fifo only has depth of 144 bytes + */ + if (len > AUX_CMD_FIFO_LEN) + return -EINVAL; + + /* Pack cmd and write to HW */ + data[0] = (msg->address >> 16) & 0xf; /* addr[19:16] */ + if (read) + data[0] |= BIT(4); /* R/W */ + + data[1] = (msg->address >> 8) & 0xff; /* addr[15:8] */ + data[2] = msg->address & 0xff; /* addr[7:0] */ + data[3] = (msg->size - 1) & 0xff; /* len[7:0] */ + + for (i = 0; i < len; i++) { + reg = (i < 4) ? data[i] : msgdata[i - 4]; + reg = EDP_AUX_DATA_DATA(reg); /* index = 0, write */ + if (i == 0) + reg |= EDP_AUX_DATA_INDEX_WRITE; + edp_write(aux->base + REG_EDP_AUX_DATA, reg); + } + + reg = 0; /* Transaction number is always 1 */ + if (!native) /* i2c */ + reg |= EDP_AUX_TRANS_CTRL_I2C; + + reg |= EDP_AUX_TRANS_CTRL_GO; + edp_write(aux->base + REG_EDP_AUX_TRANS_CTRL, reg); + + return 0; +} + +static int edp_msg_fifo_rx(struct edp_aux *aux, struct drm_dp_aux_msg *msg) +{ + u32 data; + u8 *dp; + int i; + u32 len = msg->size; + + edp_write(aux->base + REG_EDP_AUX_DATA, + EDP_AUX_DATA_INDEX_WRITE | EDP_AUX_DATA_READ); /* index = 0 */ + + dp = msg->buffer; + + /* discard first byte */ + data = edp_read(aux->base + REG_EDP_AUX_DATA); + for (i = 0; i < len; i++) { + data = edp_read(aux->base + REG_EDP_AUX_DATA); + dp[i] = (u8)((data >> 8) & 0xff); + } + + return 0; +} + +/* + * This function does the real job to process an AUX transaction. + * It will call msm_edp_aux_ctrl() function to reset the AUX channel, + * if the waiting is timeout. + * The caller who triggers the transaction should avoid the + * msm_edp_aux_ctrl() running concurrently in other threads, i.e. + * start transaction only when AUX channel is fully enabled. + */ +ssize_t edp_aux_transfer(struct drm_dp_aux *drm_aux, struct drm_dp_aux_msg *msg) +{ + struct edp_aux *aux = to_edp_aux(drm_aux); + ssize_t ret; + bool native = msg->request & (DP_AUX_NATIVE_WRITE & DP_AUX_NATIVE_READ); + bool read = msg->request & (DP_AUX_I2C_READ & DP_AUX_NATIVE_READ); + + /* Ignore address only message */ + if ((msg->size == 0) || (msg->buffer == NULL)) { + msg->reply = native ? + DP_AUX_NATIVE_REPLY_ACK : DP_AUX_I2C_REPLY_ACK; + return msg->size; + } + + /* msg sanity check */ + if ((native && (msg->size > AUX_CMD_NATIVE_MAX)) || + (msg->size > AUX_CMD_I2C_MAX)) { + pr_err("%s: invalid msg: size(%d), request(%x)\n", + __func__, msg->size, msg->request); + return -EINVAL; + } + + mutex_lock(&aux->msg_mutex); + + aux->msg_err = false; + reinit_completion(&aux->msg_comp); + + ret = edp_msg_fifo_tx(aux, msg); + if (ret < 0) + goto unlock_exit; + + DBG("wait_for_completion"); + ret = wait_for_completion_timeout(&aux->msg_comp, 300); + if (ret <= 0) { + /* + * Clear GO and reset AUX channel + * to cancel the current transaction. + */ + edp_write(aux->base + REG_EDP_AUX_TRANS_CTRL, 0); + msm_edp_aux_ctrl(aux, 1); + pr_err("%s: aux timeout, %d\n", __func__, ret); + goto unlock_exit; + } + DBG("completion"); + + if (!aux->msg_err) { + if (read) { + ret = edp_msg_fifo_rx(aux, msg); + if (ret < 0) + goto unlock_exit; + } + + msg->reply = native ? + DP_AUX_NATIVE_REPLY_ACK : DP_AUX_I2C_REPLY_ACK; + } else { + /* Reply defer to retry */ + msg->reply = native ? + DP_AUX_NATIVE_REPLY_DEFER : DP_AUX_I2C_REPLY_DEFER; + /* + * The sleep time in caller is not long enough to make sure + * our H/W completes transactions. Add more defer time here. + */ + msleep(100); + } + + /* Return requested size for success or retry */ + ret = msg->size; + +unlock_exit: + mutex_unlock(&aux->msg_mutex); + return ret; +} + +void *msm_edp_aux_init(struct device *dev, void __iomem *regbase, + struct drm_dp_aux **drm_aux) +{ + struct edp_aux *aux = NULL; + int ret; + + DBG(""); + aux = devm_kzalloc(dev, sizeof(*aux), GFP_KERNEL); + if (!aux) + return NULL; + + aux->base = regbase; + mutex_init(&aux->msg_mutex); + init_completion(&aux->msg_comp); + + aux->drm_aux.name = "msm_edp_aux"; + aux->drm_aux.dev = dev; + aux->drm_aux.transfer = edp_aux_transfer; + ret = drm_dp_aux_register(&aux->drm_aux); + if (ret) { + pr_err("%s: failed to register drm aux: %d\n", __func__, ret); + mutex_destroy(&aux->msg_mutex); + } + + if (drm_aux && aux) + *drm_aux = &aux->drm_aux; + + return aux; +} + +void msm_edp_aux_destroy(struct device *dev, struct edp_aux *aux) +{ + if (aux) { + drm_dp_aux_unregister(&aux->drm_aux); + mutex_destroy(&aux->msg_mutex); + } +} + +irqreturn_t msm_edp_aux_irq(struct edp_aux *aux, u32 isr) +{ + if (isr & EDP_INTR_TRANS_STATUS) { + DBG("isr=%x", isr); + edp_write(aux->base + REG_EDP_AUX_TRANS_CTRL, 0); + + if (isr & EDP_INTR_AUX_I2C_ERR) + aux->msg_err = true; + else + aux->msg_err = false; + + complete(&aux->msg_comp); + } + + return IRQ_HANDLED; +} + +void msm_edp_aux_ctrl(struct edp_aux *aux, int enable) +{ + u32 data; + + DBG("enable=%d", enable); + data = edp_read(aux->base + REG_EDP_AUX_CTRL); + + if (enable) { + data |= EDP_AUX_CTRL_RESET; + edp_write(aux->base + REG_EDP_AUX_CTRL, data); + /* Make sure full reset */ + wmb(); + usleep_range(500, 1000); + + data &= ~EDP_AUX_CTRL_RESET; + data |= EDP_AUX_CTRL_ENABLE; + edp_write(aux->base + REG_EDP_AUX_CTRL, data); + } else { + data &= ~EDP_AUX_CTRL_ENABLE; + edp_write(aux->base + REG_EDP_AUX_CTRL, data); + } +} + diff --git a/drivers/gpu/drm/msm/edp/edp_bridge.c b/drivers/gpu/drm/msm/edp/edp_bridge.c new file mode 100644 index 0000000..07f02b0 --- /dev/null +++ b/drivers/gpu/drm/msm/edp/edp_bridge.c @@ -0,0 +1,124 @@ +/* + * Copyright (c) 2014-2015, 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 "edp.h" + +struct edp_bridge { + struct drm_bridge base; + struct msm_edp *edp; +}; +#define to_edp_bridge(x) container_of(x, struct edp_bridge, base) + +static void edp_bridge_destroy(struct drm_bridge *bridge) +{ + struct edp_bridge *edp_bridge = to_edp_bridge(bridge); + + DBG(""); + drm_bridge_cleanup(bridge); + kfree(edp_bridge); +} + +static void edp_bridge_pre_enable(struct drm_bridge *bridge) +{ + struct edp_bridge *edp_bridge = to_edp_bridge(bridge); + struct msm_edp *edp = edp_bridge->edp; + + DBG(""); + msm_edp_ctrl_power(edp->ctrl, true); +} + +static void edp_bridge_enable(struct drm_bridge *bridge) +{ + DBG(""); +} + +static void edp_bridge_disable(struct drm_bridge *bridge) +{ + DBG(""); +} + +static void edp_bridge_post_disable(struct drm_bridge *bridge) +{ + struct edp_bridge *edp_bridge = to_edp_bridge(bridge); + struct msm_edp *edp = edp_bridge->edp; + + DBG(""); + msm_edp_ctrl_power(edp->ctrl, false); +} + +static void edp_bridge_mode_set(struct drm_bridge *bridge, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + struct drm_device *dev = bridge->dev; + struct drm_connector *connector; + struct edp_bridge *edp_bridge = to_edp_bridge(bridge); + struct msm_edp *edp = edp_bridge->edp; + + 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); + + list_for_each_entry(connector, &dev->mode_config.connector_list, head) { + if ((connector->encoder != NULL) && + (connector->encoder->bridge == bridge)) { + msm_edp_ctrl_timing_cfg(edp->ctrl, + adjusted_mode, &connector->display_info); + break; + } + } +} + +static const struct drm_bridge_funcs edp_bridge_funcs = { + .pre_enable = edp_bridge_pre_enable, + .enable = edp_bridge_enable, + .disable = edp_bridge_disable, + .post_disable = edp_bridge_post_disable, + .mode_set = edp_bridge_mode_set, + .destroy = edp_bridge_destroy, +}; + +/* initialize bridge */ +struct drm_bridge *msm_edp_bridge_init(struct msm_edp *edp) +{ + struct drm_bridge *bridge = NULL; + struct edp_bridge *edp_bridge; + int ret; + + edp_bridge = kzalloc(sizeof(*edp_bridge), GFP_KERNEL); + if (!edp_bridge) { + ret = -ENOMEM; + goto fail; + } + + edp_bridge->edp = edp; + + bridge = &edp_bridge->base; + + ret = drm_bridge_init(edp->dev, bridge, &edp_bridge_funcs); + if (ret) + goto fail; + + return bridge; + +fail: + if (bridge) + edp_bridge_destroy(bridge); + + return ERR_PTR(ret); +} diff --git a/drivers/gpu/drm/msm/edp/edp_connector.c b/drivers/gpu/drm/msm/edp/edp_connector.c new file mode 100644 index 0000000..dd403c9 --- /dev/null +++ b/drivers/gpu/drm/msm/edp/edp_connector.c @@ -0,0 +1,161 @@ +/* + * Copyright (c) 2014-2015, 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 "drm/drm_edid.h" +#include "msm_kms.h" +#include "edp.h" + +struct edp_connector { + struct drm_connector base; + struct msm_edp *edp; +}; +#define to_edp_connector(x) container_of(x, struct edp_connector, base) + +static enum drm_connector_status edp_connector_detect( + struct drm_connector *connector, bool force) +{ + struct edp_connector *edp_connector = to_edp_connector(connector); + struct msm_edp *edp = edp_connector->edp; + + DBG(""); + return msm_edp_ctrl_panel_connected(edp->ctrl) ? + connector_status_connected : connector_status_disconnected; +} + +static void edp_connector_destroy(struct drm_connector *connector) +{ + struct edp_connector *edp_connector = to_edp_connector(connector); + + DBG(""); + drm_connector_unregister(connector); + drm_connector_cleanup(connector); + + kfree(edp_connector); +} + +static int edp_connector_get_modes(struct drm_connector *connector) +{ + struct edp_connector *edp_connector = to_edp_connector(connector); + struct msm_edp *edp = edp_connector->edp; + + struct edid *drm_edid = NULL; + int ret = 0; + + DBG(""); + ret = msm_edp_ctrl_get_panel_info(edp->ctrl, connector, &drm_edid); + if (ret) + return ret; + + drm_mode_connector_update_edid_property(connector, drm_edid); + if (drm_edid) + ret = drm_add_edid_modes(connector, drm_edid); + + return ret; +} + +static int edp_connector_mode_valid(struct drm_connector *connector, + struct drm_display_mode *mode) +{ + struct edp_connector *edp_connector = to_edp_connector(connector); + struct msm_edp *edp = edp_connector->edp; + struct msm_drm_private *priv = connector->dev->dev_private; + struct msm_kms *kms = priv->kms; + long actual, requested; + + requested = 1000 * mode->clock; + actual = kms->funcs->round_pixclk(kms, + requested, edp_connector->edp->encoder); + + DBG("requested=%ld, actual=%ld", requested, actual); + if (actual != requested) + return MODE_CLOCK_RANGE; + + if (!msm_edp_ctrl_pixel_clock_valid( + edp->ctrl, mode->clock, NULL, NULL)) + return MODE_CLOCK_RANGE; + + /* Invalidate all modes if color format is not supported */ + if (connector->display_info.bpc > 8) + return MODE_BAD; + + return MODE_OK; +} + +static struct drm_encoder * +edp_connector_best_encoder(struct drm_connector *connector) +{ + struct edp_connector *edp_connector = to_edp_connector(connector); + + DBG(""); + return edp_connector->edp->encoder; +} + +static const struct drm_connector_funcs edp_connector_funcs = { + .dpms = drm_helper_connector_dpms, + .detect = edp_connector_detect, + .fill_modes = drm_helper_probe_single_connector_modes, + .destroy = edp_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 edp_connector_helper_funcs = { + .get_modes = edp_connector_get_modes, + .mode_valid = edp_connector_mode_valid, + .best_encoder = edp_connector_best_encoder, +}; + +/* initialize connector */ +struct drm_connector *msm_edp_connector_init(struct msm_edp *edp) +{ + struct drm_connector *connector = NULL; + struct edp_connector *edp_connector; + int ret; + + edp_connector = kzalloc(sizeof(*edp_connector), GFP_KERNEL); + if (!edp_connector) { + ret = -ENOMEM; + goto fail; + } + + edp_connector->edp = edp; + + connector = &edp_connector->base; + + ret = drm_connector_init(edp->dev, connector, &edp_connector_funcs, + DRM_MODE_CONNECTOR_eDP); + if (ret) + goto fail; + + drm_connector_helper_add(connector, &edp_connector_helper_funcs); + + /* We don't support HPD, so only poll status until connected. */ + connector->polled = DRM_CONNECTOR_POLL_CONNECT; + + /* Display driver doesn't support interlace now. */ + connector->interlace_allowed = false; + connector->doublescan_allowed = false; + + ret = drm_connector_register(connector); + if (ret) + goto fail; + + return connector; + +fail: + if (connector) + edp_connector_destroy(connector); + + return ERR_PTR(ret); +} diff --git a/drivers/gpu/drm/msm/edp/edp_ctrl.c b/drivers/gpu/drm/msm/edp/edp_ctrl.c new file mode 100644 index 0000000..5e0f89e --- /dev/null +++ b/drivers/gpu/drm/msm/edp/edp_ctrl.c @@ -0,0 +1,1390 @@ +/* + * Copyright (c) 2014-2015, 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/gpio/consumer.h> +#include <linux/regulator/consumer.h> + +#include "drm_crtc.h" +#include "drm_dp_helper.h" +#include "drm_edid.h" +#include "edp.h" +#include "edp.xml.h" + +#define VDDA_MIN_UV 1800000 /* uV units */ +#define VDDA_MAX_UV 1800000 /* uV units */ +#define VDDA_UA_ON_LOAD 100000 /* uA units */ +#define VDDA_UA_OFF_LOAD 100 /* uA units */ + +#define DPCD_LINK_VOLTAGE_MAX 4 +#define DPCD_LINK_PRE_EMPHASIS_MAX 4 + +#define EDP_LINK_BW_MAX DP_LINK_BW_2_7 + +/* Link training return value */ +#define EDP_TRAIN_FAIL -1 +#define EDP_TRAIN_SUCCESS 0 +#define EDP_TRAIN_RECONFIG 1 + +#define EDP_CLK_MASK_AHB BIT(0) +#define EDP_CLK_MASK_AUX BIT(1) +#define EDP_CLK_MASK_LINK BIT(2) +#define EDP_CLK_MASK_PIXEL BIT(3) +#define EDP_CLK_MASK_MDP_CORE BIT(4) +#define EDP_CLK_MASK_LINK_CHAN (EDP_CLK_MASK_LINK | EDP_CLK_MASK_PIXEL) +#define EDP_CLK_MASK_AUX_CHAN \ + (EDP_CLK_MASK_AHB | EDP_CLK_MASK_AUX | EDP_CLK_MASK_MDP_CORE) +#define EDP_CLK_MASK_ALL (EDP_CLK_MASK_AUX_CHAN | EDP_CLK_MASK_LINK_CHAN) + +#define EDP_BACKLIGHT_MAX 255 + +#define EDP_INTR_STATUS1 \ + (EDP_INTERRUPT_REG_1_HPD | EDP_INTERRUPT_REG_1_AUX_I2C_DONE | \ + EDP_INTERRUPT_REG_1_WRONG_ADDR | EDP_INTERRUPT_REG_1_TIMEOUT | \ + EDP_INTERRUPT_REG_1_NACK_DEFER | EDP_INTERRUPT_REG_1_WRONG_DATA_CNT | \ + EDP_INTERRUPT_REG_1_I2C_NACK | EDP_INTERRUPT_REG_1_I2C_DEFER | \ + EDP_INTERRUPT_REG_1_PLL_UNLOCK | EDP_INTERRUPT_REG_1_AUX_ERROR) +#define EDP_INTR_MASK1 (EDP_INTR_STATUS1 << 2) +#define EDP_INTR_STATUS2 \ + (EDP_INTERRUPT_REG_2_READY_FOR_VIDEO | \ + EDP_INTERRUPT_REG_2_IDLE_PATTERNs_SENT | \ + EDP_INTERRUPT_REG_2_FRAME_END | EDP_INTERRUPT_REG_2_CRC_UPDATED) +#define EDP_INTR_MASK2 (EDP_INTR_STATUS2 << 2) + +struct edp_ctrl { + struct platform_device *pdev; + + void __iomem *base; + + /* regulators */ + struct regulator *vdda_vreg; + struct regulator *lvl_vreg; + + /* clocks */ + struct clk *aux_clk; + struct clk *pixel_clk; + struct clk *ahb_clk; + struct clk *link_clk; + struct clk *mdp_core_clk; + + /* gpios */ + struct gpio_desc *panel_en_gpio; + struct gpio_desc *panel_hpd_gpio; + + /* completion and mutex */ + struct completion idle_comp; + struct mutex dev_mutex; /* To protect device power status */ + + /* work queue */ + struct work_struct on_work; + struct work_struct off_work; + struct workqueue_struct *workqueue; + + /* Interrupt register lock */ + spinlock_t irq_lock; + + bool edp_connected; + bool power_on; + + /* edid raw data */ + struct edid *edid; + + struct drm_dp_link dp_link; + struct drm_dp_aux *drm_aux; + + /* dpcd raw data */ + u8 dpcd[DP_RECEIVER_CAP_SIZE]; + + /* Link status */ + u8 link_rate; + u8 lane_cnt; + u8 v_level; + u8 p_level; + + /* Timing status */ + u8 interlaced; + u32 pixel_rate; /* in kHz */ + u32 color_depth; + + struct edp_aux *aux; + struct edp_phy *phy; +}; + +struct edp_pixel_clk_div { + u32 rate; /* in kHz */ + u32 m; + u32 n; +}; + +#define EDP_PIXEL_CLK_NUM 8 +static const struct edp_pixel_clk_div clk_divs[2][EDP_PIXEL_CLK_NUM] = { + { /* Link clock = 162MHz, source clock = 810MHz */ + {119000, 31, 211}, /* WSXGA+ 1680x1050@60Hz CVT */ + {130250, 32, 199}, /* UXGA 1600x1200@60Hz CVT */ + {148500, 11, 60}, /* FHD 1920x1080@60Hz */ + {154000, 50, 263}, /* WUXGA 1920x1200@60Hz CVT */ + {209250, 31, 120}, /* QXGA 2048x1536@60Hz CVT */ + {268500, 119, 359}, /* WQXGA 2560x1600@60Hz CVT */ + {138530, 33, 193}, /* AUO B116HAN03.0 Panel */ + {141400, 48, 275}, /* AUO B133HTN01.2 Panel */ + }, + { /* Link clock = 270MHz, source clock = 675MHz */ + {119000, 52, 295}, /* WSXGA+ 1680x1050@60Hz CVT */ + {130250, 11, 57}, /* UXGA 1600x1200@60Hz CVT */ + {148500, 11, 50}, /* FHD 1920x1080@60Hz */ + {154000, 47, 206}, /* WUXGA 1920x1200@60Hz CVT */ + {209250, 31, 100}, /* QXGA 2048x1536@60Hz CVT */ + {268500, 107, 269}, /* WQXGA 2560x1600@60Hz CVT */ + {138530, 63, 307}, /* AUO B116HAN03.0 Panel */ + {141400, 53, 253}, /* AUO B133HTN01.2 Panel */ + }, +}; + +static int edp_clk_init(struct edp_ctrl *ctrl) +{ + struct device *dev = &ctrl->pdev->dev; + int ret; + + ctrl->aux_clk = devm_clk_get(dev, "core_clk"); + if (IS_ERR(ctrl->aux_clk)) { + ret = PTR_ERR(ctrl->aux_clk); + pr_err("%s: Can't find aux_clk, %d\n", __func__, ret); + ctrl->aux_clk = NULL; + return ret; + } + + ctrl->pixel_clk = devm_clk_get(dev, "pixel_clk"); + if (IS_ERR(ctrl->pixel_clk)) { + ret = PTR_ERR(ctrl->pixel_clk); + pr_err("%s: Can't find pixel_clk, %d\n", __func__, ret); + ctrl->pixel_clk = NULL; + return ret; + } + + ctrl->ahb_clk = devm_clk_get(dev, "iface_clk"); + if (IS_ERR(ctrl->ahb_clk)) { + ret = PTR_ERR(ctrl->ahb_clk); + pr_err("%s: Can't find ahb_clk, %d\n", __func__, ret); + ctrl->ahb_clk = NULL; + return ret; + } + + ctrl->link_clk = devm_clk_get(dev, "link_clk"); + if (IS_ERR(ctrl->link_clk)) { + ret = PTR_ERR(ctrl->link_clk); + pr_err("%s: Can't find link_clk, %d\n", __func__, ret); + ctrl->link_clk = NULL; + return ret; + } + + /* need mdp core clock to receive irq */ + ctrl->mdp_core_clk = devm_clk_get(dev, "mdp_core_clk"); + if (IS_ERR(ctrl->mdp_core_clk)) { + ret = PTR_ERR(ctrl->mdp_core_clk); + pr_err("%s: Can't find mdp_core_clk, %d\n", __func__, ret); + ctrl->mdp_core_clk = NULL; + return ret; + } + + return 0; +} + +static int edp_clk_enable(struct edp_ctrl *ctrl, u32 clk_mask) +{ + int ret; + + DBG("mask=%x", clk_mask); + /* ahb_clk should be enabled first */ + if (clk_mask & EDP_CLK_MASK_AHB) { + ret = clk_prepare_enable(ctrl->ahb_clk); + if (ret) { + pr_err("%s: Failed to enable ahb clk\n", __func__); + goto f0; + } + } + if (clk_mask & EDP_CLK_MASK_AUX) { + ret = clk_set_rate(ctrl->aux_clk, 19200000); + if (ret) { + pr_err("%s: Failed to set rate aux clk\n", __func__); + goto f1; + } + ret = clk_prepare_enable(ctrl->aux_clk); + if (ret) { + pr_err("%s: Failed to enable aux clk\n", __func__); + goto f1; + } + } + /* Need to set rate and enable link_clk prior to pixel_clk */ + if (clk_mask & EDP_CLK_MASK_LINK) { + DBG("edp->link_clk, set_rate %ld", + (unsigned long)ctrl->link_rate * 27000000); + ret = clk_set_rate(ctrl->link_clk, + (unsigned long)ctrl->link_rate * 27000000); + if (ret) { + pr_err("%s: Failed to set rate to link clk\n", + __func__); + goto f2; + } + + ret = clk_prepare_enable(ctrl->link_clk); + if (ret) { + pr_err("%s: Failed to enable link clk\n", __func__); + goto f2; + } + } + if (clk_mask & EDP_CLK_MASK_PIXEL) { + DBG("edp->pixel_clk, set_rate %ld", + (unsigned long)ctrl->pixel_rate * 1000); + ret = clk_set_rate(ctrl->pixel_clk, + (unsigned long)ctrl->pixel_rate * 1000); + if (ret) { + pr_err("%s: Failed to set rate to pixel clk\n", + __func__); + goto f3; + } + + ret = clk_prepare_enable(ctrl->pixel_clk); + if (ret) { + pr_err("%s: Failed to enable pixel clk\n", __func__); + goto f3; + } + } + if (clk_mask & EDP_CLK_MASK_MDP_CORE) { + ret = clk_prepare_enable(ctrl->mdp_core_clk); + if (ret) { + pr_err("%s: Failed to enable mdp core clk\n", __func__); + goto f4; + } + } + + return 0; + +f4: + if (clk_mask & EDP_CLK_MASK_PIXEL) + clk_disable_unprepare(ctrl->pixel_clk); +f3: + if (clk_mask & EDP_CLK_MASK_LINK) + clk_disable_unprepare(ctrl->link_clk); +f2: + if (clk_mask & EDP_CLK_MASK_AUX) + clk_disable_unprepare(ctrl->aux_clk); +f1: + if (clk_mask & EDP_CLK_MASK_AHB) + clk_disable_unprepare(ctrl->ahb_clk); +f0: + return ret; +} + +static void edp_clk_disable(struct edp_ctrl *ctrl, u32 clk_mask) +{ + if (clk_mask & EDP_CLK_MASK_MDP_CORE) + clk_disable_unprepare(ctrl->mdp_core_clk); + if (clk_mask & EDP_CLK_MASK_PIXEL) + clk_disable_unprepare(ctrl->pixel_clk); + if (clk_mask & EDP_CLK_MASK_LINK) + clk_disable_unprepare(ctrl->link_clk); + if (clk_mask & EDP_CLK_MASK_AUX) + clk_disable_unprepare(ctrl->aux_clk); + if (clk_mask & EDP_CLK_MASK_AHB) + clk_disable_unprepare(ctrl->ahb_clk); +} + +static int edp_regulator_init(struct edp_ctrl *ctrl) +{ + struct device *dev = &ctrl->pdev->dev; + + DBG(""); + ctrl->vdda_vreg = devm_regulator_get(dev, "vdda"); + if (IS_ERR(ctrl->vdda_vreg)) { + pr_err("%s: Could not get vdda reg, ret = %ld\n", __func__, + PTR_ERR(ctrl->vdda_vreg)); + ctrl->vdda_vreg = NULL; + return PTR_ERR(ctrl->vdda_vreg); + } + ctrl->lvl_vreg = devm_regulator_get(dev, "lvl-vdd"); + if (IS_ERR(ctrl->lvl_vreg)) { + pr_err("Could not get lvl-vdd reg, %ld", + PTR_ERR(ctrl->lvl_vreg)); + ctrl->lvl_vreg = NULL; + return PTR_ERR(ctrl->lvl_vreg); + } + + return 0; +} + +static int edp_regulator_enable(struct edp_ctrl *ctrl) +{ + int ret; + + ret = regulator_set_voltage(ctrl->vdda_vreg, VDDA_MIN_UV, VDDA_MAX_UV); + if (ret) { + pr_err("%s:vdda_vreg set_voltage failed, %d\n", __func__, ret); + goto vdda_set_fail; + } + + ret = regulator_set_optimum_mode(ctrl->vdda_vreg, VDDA_UA_ON_LOAD); + if (ret < 0) { + pr_err("%s: vdda_vreg set regulator mode failed.\n", __func__); + goto vdda_set_fail; + } + + ret = regulator_enable(ctrl->vdda_vreg); + if (ret) { + pr_err("%s: Failed to enable vdda_vreg regulator.\n", __func__); + goto vdda_enable_fail; + } + + ret = regulator_enable(ctrl->lvl_vreg); + if (ret) { + pr_err("Failed to enable lvl-vdd reg regulator, %d", ret); + goto lvl_enable_fail; + } + + DBG("exit"); + return 0; + +lvl_enable_fail: + regulator_disable(ctrl->vdda_vreg); +vdda_enable_fail: + regulator_set_optimum_mode(ctrl->vdda_vreg, VDDA_UA_OFF_LOAD); +vdda_set_fail: + return ret; +} + +static void edp_regulator_disable(struct edp_ctrl *ctrl) +{ + regulator_disable(ctrl->lvl_vreg); + regulator_disable(ctrl->vdda_vreg); + regulator_set_optimum_mode(ctrl->vdda_vreg, VDDA_UA_OFF_LOAD); +} + +static int edp_gpio_config(struct edp_ctrl *ctrl) +{ + struct device *dev = &ctrl->pdev->dev; + int ret; + + ctrl->panel_hpd_gpio = devm_gpiod_get(dev, "panel-hpd"); + if (IS_ERR(ctrl->panel_hpd_gpio)) { + ret = PTR_ERR(ctrl->panel_hpd_gpio); + ctrl->panel_hpd_gpio = NULL; + pr_err("%s: cannot get panel-hpd-gpios, %d\n", __func__, ret); + return ret; + } + + ret = gpiod_direction_input(ctrl->panel_hpd_gpio); + if (ret) { + pr_err("%s: Set direction for hpd failed, %d\n", __func__, ret); + return ret; + } + + ctrl->panel_en_gpio = devm_gpiod_get(dev, "panel-en"); + if (IS_ERR(ctrl->panel_en_gpio)) { + ret = PTR_ERR(ctrl->panel_en_gpio); + ctrl->panel_en_gpio = NULL; + pr_err("%s: cannot get panel-en-gpios, %d\n", __func__, ret); + return ret; + } + + ret = gpiod_direction_output(ctrl->panel_en_gpio, 0); + if (ret) { + pr_err("%s: Set direction for panel_en failed, %d\n", + __func__, ret); + return ret; + } + + DBG("gpio on"); + + return 0; +} + +static void edp_ctrl_irq_enable(struct edp_ctrl *ctrl, int enable) +{ + unsigned long flags; + + DBG("%d", enable); + spin_lock_irqsave(&ctrl->irq_lock, flags); + if (enable) { + edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_1, EDP_INTR_MASK1); + edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_2, EDP_INTR_MASK2); + } else { + edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_1, 0x0); + edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_2, 0x0); + } + spin_unlock_irqrestore(&ctrl->irq_lock, flags); + DBG("exit"); +} + +static void edp_fill_link_cfg(struct edp_ctrl *ctrl) +{ + u32 prate; + u32 lrate; + u32 bpp; + u8 max_lane = ctrl->dp_link.num_lanes; + u8 lane; + + prate = ctrl->pixel_rate; + bpp = ctrl->color_depth * 3; + + /* + * By default, use the maximum link rate and minimum lane count, + * so that we can do rate down shift during link training. + */ + ctrl->link_rate = drm_dp_link_rate_to_bw_code(ctrl->dp_link.rate); + + prate *= bpp; + prate /= 8; /* in kByte */ + + lrate = 270000; /* in kHz */ + lrate *= ctrl->link_rate; + lrate /= 10; /* in kByte, 10 bits --> 8 bits */ + + for (lane = 1; lane <= max_lane; lane <<= 1) { + if (lrate >= prate) + break; + lrate <<= 1; + } + + ctrl->lane_cnt = lane; + DBG("rate=%d lane=%d", ctrl->link_rate, ctrl->lane_cnt); +} + +static int edp_sink_power_state(struct edp_ctrl *ctrl, u8 state) +{ + u8 s = state; + + DBG("%d", s); + + if (ctrl->dp_link.revision < 0x11) + return 0; + + if (drm_dp_dpcd_write(ctrl->drm_aux, DP_SET_POWER, &s, 1) < 1) { + pr_err("%s: Set power state to panel failed\n", __func__); + return -ENOLINK; + } + + return 0; +} + +static void edp_config_ctrl(struct edp_ctrl *ctrl) +{ + u32 data; + enum edp_color_depth depth; + + data = EDP_CONFIGURATION_CTRL_LANES(ctrl->lane_cnt - 1); + + if (ctrl->dp_link.capabilities & DP_LINK_CAP_ENHANCED_FRAMING) + data |= EDP_CONFIGURATION_CTRL_ENHANCED_FRAMING; + + depth = EDP_6BIT; + if (ctrl->color_depth == 8) + depth = EDP_8BIT; + + data |= EDP_CONFIGURATION_CTRL_COLOR(depth); + + if (!ctrl->interlaced) /* progressive */ + data |= EDP_CONFIGURATION_CTRL_PROGRESSIVE; + + data |= (EDP_CONFIGURATION_CTRL_SYNC_CLK | + EDP_CONFIGURATION_CTRL_STATIC_MVID); + + edp_write(ctrl->base + REG_EDP_CONFIGURATION_CTRL, data); +} + +static void edp_state_ctrl(struct edp_ctrl *ctrl, u32 state) +{ + edp_write(ctrl->base + REG_EDP_STATE_CTRL, state); + /* Make sure H/W status is set */ + wmb(); +} + +static int edp_lane_set_write(struct edp_ctrl *ctrl, + u8 voltage_level, u8 pre_emphasis_level) +{ + int i; + u8 buf[4]; + + if (voltage_level >= DPCD_LINK_VOLTAGE_MAX) + voltage_level |= 0x04; + + if (pre_emphasis_level >= DPCD_LINK_PRE_EMPHASIS_MAX) + pre_emphasis_level |= 0x04; + + pre_emphasis_level <<= 3; + + for (i = 0; i < 4; i++) + buf[i] = voltage_level | pre_emphasis_level; + + DBG("%s: p|v=0x%x", __func__, voltage_level | pre_emphasis_level); + if (drm_dp_dpcd_write(ctrl->drm_aux, 0x103, buf, 4) < 4) { + pr_err("%s: Set sw/pe to panel failed\n", __func__); + return -ENOLINK; + } + + return 0; +} + +static int edp_train_pattern_set_write(struct edp_ctrl *ctrl, u8 pattern) +{ + u8 p = pattern; + + DBG("pattern=%x", p); + if (drm_dp_dpcd_write(ctrl->drm_aux, + DP_TRAINING_PATTERN_SET, &p, 1) < 1) { + pr_err("%s: Set training pattern to panel failed\n", __func__); + return -ENOLINK; + } + + return 0; +} + +static void edp_sink_train_set_adjust(struct edp_ctrl *ctrl, + const u8 *link_status) +{ + int i; + u8 max = 0; + u8 data; + + /* use the max level across lanes */ + for (i = 0; i < ctrl->lane_cnt; i++) { + data = drm_dp_get_adjust_request_voltage(link_status, i); + DBG("lane=%d req_voltage_swing=0x%x", i, data); + if (max < data) + max = data; + } + + ctrl->v_level = max >> DP_TRAIN_VOLTAGE_SWING_SHIFT; + + /* use the max level across lanes */ + max = 0; + for (i = 0; i < ctrl->lane_cnt; i++) { + data = drm_dp_get_adjust_request_pre_emphasis(link_status, i); + DBG("lane=%d req_pre_emphasis=0x%x", i, data); + if (max < data) + max = data; + } + + ctrl->p_level = max >> DP_TRAIN_PRE_EMPHASIS_SHIFT; + DBG("v_level=%d, p_level=%d", ctrl->v_level, ctrl->p_level); +} + +static void edp_host_train_set(struct edp_ctrl *ctrl, u32 train) +{ + int cnt = 10; + u32 data; + u32 shift = train - 1; + + DBG("train=%d", train); + + edp_state_ctrl(ctrl, EDP_STATE_CTRL_TRAIN_PATTERN_1 << shift); + while (--cnt) { + data = edp_read(ctrl->base + REG_EDP_MAINLINK_READY); + if (data & (EDP_MAINLINK_READY_TRAIN_PATTERN_1_READY << shift)) + break; + } + + if (cnt == 0) + pr_err("%s: set link_train=%d failed\n", __func__, train); +} + +static const u8 vm_pre_emphasis[4][4] = { + {0x03, 0x06, 0x09, 0x0C}, /* pe0, 0 db */ + {0x03, 0x06, 0x09, 0xFF}, /* pe1, 3.5 db */ + {0x03, 0x06, 0xFF, 0xFF}, /* pe2, 6.0 db */ + {0x03, 0xFF, 0xFF, 0xFF} /* pe3, 9.5 db */ +}; + +/* voltage swing, 0.2v and 1.0v are not support */ +static const u8 vm_voltage_swing[4][4] = { + {0x14, 0x18, 0x1A, 0x1E}, /* sw0, 0.4v */ + {0x18, 0x1A, 0x1E, 0xFF}, /* sw1, 0.6 v */ + {0x1A, 0x1E, 0xFF, 0xFF}, /* sw1, 0.8 v */ + {0x1E, 0xFF, 0xFF, 0xFF} /* sw1, 1.2 v, optional */ +}; + +static int edp_voltage_pre_emphasise_set(struct edp_ctrl *ctrl) +{ + u32 value0; + u32 value1; + + DBG("v=%d p=%d", ctrl->v_level, ctrl->p_level); + + value0 = vm_pre_emphasis[(int)(ctrl->v_level)][(int)(ctrl->p_level)]; + value1 = vm_voltage_swing[(int)(ctrl->v_level)][(int)(ctrl->p_level)]; + + /* Configure host and panel only if both values are allowed */ + if (value0 != 0xFF && value1 != 0xFF) { + msm_edp_phy_vm_pe_cfg(ctrl->phy, value0, value1); + return edp_lane_set_write(ctrl, ctrl->v_level, ctrl->p_level); + } + + return -EINVAL; +} + +static int edp_start_link_train_1(struct edp_ctrl *ctrl) +{ + u8 link_status[DP_LINK_STATUS_SIZE]; + u8 old_v_level; + int tries; + int ret; + int rlen; + + DBG(""); + + edp_host_train_set(ctrl, DP_TRAINING_PATTERN_1); + ret = edp_voltage_pre_emphasise_set(ctrl); + if (ret) + return ret; + ret = edp_train_pattern_set_write(ctrl, + DP_TRAINING_PATTERN_1 | DP_RECOVERED_CLOCK_OUT_EN); + if (ret) + return ret; + + tries = 0; + old_v_level = ctrl->v_level; + while (1) { + drm_dp_link_train_clock_recovery_delay(ctrl->dpcd); + + rlen = drm_dp_dpcd_read_link_status(ctrl->drm_aux, link_status); + if (rlen < DP_LINK_STATUS_SIZE) { + pr_err("%s: read link status failed\n", __func__); + return -ENOLINK; + } + if (drm_dp_clock_recovery_ok(link_status, ctrl->lane_cnt)) { + ret = 0; + break; + } + + if (ctrl->v_level == DPCD_LINK_VOLTAGE_MAX) { + ret = -1; + break; + } + + if (old_v_level == ctrl->v_level) { + tries++; + if (tries >= 5) { + ret = -1; + break; + } + } else { + tries = 0; + old_v_level = ctrl->v_level; + } + + edp_sink_train_set_adjust(ctrl, link_status); + ret = edp_voltage_pre_emphasise_set(ctrl); + if (ret) + return ret; + } + + return ret; +} + +static int edp_start_link_train_2(struct edp_ctrl *ctrl) +{ + u8 link_status[DP_LINK_STATUS_SIZE]; + int tries = 0; + int ret; + int rlen; + + DBG(""); + + edp_host_train_set(ctrl, DP_TRAINING_PATTERN_2); + ret = edp_voltage_pre_emphasise_set(ctrl); + if (ret) + return ret; + + ret = edp_train_pattern_set_write(ctrl, + DP_TRAINING_PATTERN_2 | DP_RECOVERED_CLOCK_OUT_EN); + if (ret) + return ret; + + while (1) { + drm_dp_link_train_channel_eq_delay(ctrl->dpcd); + + rlen = drm_dp_dpcd_read_link_status(ctrl->drm_aux, link_status); + if (rlen < DP_LINK_STATUS_SIZE) { + pr_err("%s: read link status failed\n", __func__); + return -ENOLINK; + } + if (drm_dp_channel_eq_ok(link_status, ctrl->lane_cnt)) { + ret = 0; + break; + } + + tries++; + if (tries > 10) { + ret = -1; + break; + } + + edp_sink_train_set_adjust(ctrl, link_status); + ret = edp_voltage_pre_emphasise_set(ctrl); + if (ret) + return ret; + } + + return ret; +} + +static int edp_link_rate_down_shift(struct edp_ctrl *ctrl) +{ + u32 prate, lrate, bpp; + u8 rate, lane, max_lane; + int changed = 0; + + rate = ctrl->link_rate; + lane = ctrl->lane_cnt; + max_lane = ctrl->dp_link.num_lanes; + + bpp = ctrl->color_depth * 3; + prate = ctrl->pixel_rate; + prate *= bpp; + prate /= 8; /* in kByte */ + + if (rate > DP_LINK_BW_1_62 && rate <= EDP_LINK_BW_MAX) { + rate -= 4; /* reduce rate */ + changed++; + } + + if (changed) { + if (lane >= 1 && lane < max_lane) + lane <<= 1; /* increase lane */ + + lrate = 270000; /* in kHz */ + lrate *= rate; + lrate /= 10; /* kByte, 10 bits --> 8 bits */ + lrate *= lane; + + DBG("new lrate=%u prate=%u(kHz) rate=%d lane=%d p=%u b=%d", + lrate, prate, rate, lane, + ctrl->pixel_rate, + bpp); + + if (lrate > prate) { + ctrl->link_rate = rate; + ctrl->lane_cnt = lane; + DBG("new rate=%d %d", rate, lane); + return 0; + } + } + + return -EINVAL; +} + +static int edp_clear_training_pattern(struct edp_ctrl *ctrl) +{ + int ret; + + ret = edp_train_pattern_set_write(ctrl, 0); + + drm_dp_link_train_channel_eq_delay(ctrl->dpcd); + + return ret; +} + +static int edp_do_link_train(struct edp_ctrl *ctrl) +{ + int ret; + struct drm_dp_link dp_link; + + DBG(""); + /* + * Set the current link rate and lane cnt to panel. They may have been + * adjusted and the values are different from them in DPCD CAP + */ + dp_link.num_lanes = ctrl->lane_cnt; + dp_link.rate = drm_dp_bw_code_to_link_rate(ctrl->link_rate); + dp_link.capabilities = ctrl->dp_link.capabilities; + if (drm_dp_link_configure(ctrl->drm_aux, &dp_link) < 0) + return EDP_TRAIN_FAIL; + + ctrl->v_level = 0; /* start from default level */ + ctrl->p_level = 0; + + edp_state_ctrl(ctrl, 0); + if (edp_clear_training_pattern(ctrl)) + return EDP_TRAIN_FAIL; + + ret = edp_start_link_train_1(ctrl); + if (ret < 0) { + if (edp_link_rate_down_shift(ctrl) == 0) { + DBG("link reconfig"); + ret = EDP_TRAIN_RECONFIG; + goto clear; + } else { + pr_err("%s: Training 1 failed", __func__); + ret = EDP_TRAIN_FAIL; + goto clear; + } + } + DBG("Training 1 completed successfully"); + + edp_state_ctrl(ctrl, 0); + if (edp_clear_training_pattern(ctrl)) + return EDP_TRAIN_FAIL; + + ret = edp_start_link_train_2(ctrl); + if (ret < 0) { + if (edp_link_rate_down_shift(ctrl) == 0) { + DBG("link reconfig"); + ret = EDP_TRAIN_RECONFIG; + goto clear; + } else { + pr_err("%s: Training 2 failed", __func__); + ret = EDP_TRAIN_FAIL; + goto clear; + } + } + DBG("Training 2 completed successfully"); + + edp_state_ctrl(ctrl, EDP_STATE_CTRL_SEND_VIDEO); +clear: + edp_clear_training_pattern(ctrl); + + return ret; +} + +static void edp_clock_synchrous(struct edp_ctrl *ctrl, int sync) +{ + u32 data; + enum edp_color_depth depth; + + data = edp_read(ctrl->base + REG_EDP_MISC1_MISC0); + + if (sync) + data |= EDP_MISC1_MISC0_SYNC; + else + data &= ~EDP_MISC1_MISC0_SYNC; + + /* only legacy rgb mode supported */ + depth = EDP_6BIT; /* Default */ + if (ctrl->color_depth == 8) + depth = EDP_8BIT; + else if (ctrl->color_depth == 10) + depth = EDP_10BIT; + else if (ctrl->color_depth == 12) + depth = EDP_12BIT; + else if (ctrl->color_depth == 16) + depth = EDP_16BIT; + + data |= EDP_MISC1_MISC0_COLOR(depth); + + edp_write(ctrl->base + REG_EDP_MISC1_MISC0, data); +} + +static int edp_sw_mvid_nvid(struct edp_ctrl *ctrl, u32 m, u32 n) +{ + u32 n_multi, m_multi = 5; + + if (ctrl->link_rate == DP_LINK_BW_1_62) { + n_multi = 1; + } else if (ctrl->link_rate == DP_LINK_BW_2_7) { + n_multi = 2; + } else { + pr_err("%s: Invalid link rate, %d\n", __func__, + ctrl->link_rate); + return -EINVAL; + } + + edp_write(ctrl->base + REG_EDP_SOFTWARE_MVID, m * m_multi); + edp_write(ctrl->base + REG_EDP_SOFTWARE_NVID, n * n_multi); + + return 0; +} + +static void edp_mainlink_ctrl(struct edp_ctrl *ctrl, int enable) +{ + u32 data = 0; + + edp_write(ctrl->base + REG_EDP_MAINLINK_CTRL, EDP_MAINLINK_CTRL_RESET); + /* Make sure fully reset */ + wmb(); + usleep_range(500, 1000); + + if (enable) + data |= EDP_MAINLINK_CTRL_ENABLE; + + edp_write(ctrl->base + REG_EDP_MAINLINK_CTRL, data); +} + +static void edp_ctrl_phy_aux_enable(struct edp_ctrl *ctrl, int enable) +{ + if (enable) { + edp_regulator_enable(ctrl); + edp_clk_enable(ctrl, EDP_CLK_MASK_AUX_CHAN); + msm_edp_phy_ctrl(ctrl->phy, 1); + msm_edp_aux_ctrl(ctrl->aux, 1); + gpiod_set_value(ctrl->panel_en_gpio, 1); + } else { + gpiod_set_value(ctrl->panel_en_gpio, 0); + msm_edp_aux_ctrl(ctrl->aux, 0); + msm_edp_phy_ctrl(ctrl->phy, 0); + edp_clk_disable(ctrl, EDP_CLK_MASK_AUX_CHAN); + edp_regulator_disable(ctrl); + } +} + +static void edp_ctrl_link_enable(struct edp_ctrl *ctrl, int enable) +{ + u32 m, n; + + if (enable) { + /* Enable link channel clocks */ + edp_clk_enable(ctrl, EDP_CLK_MASK_LINK_CHAN); + + msm_edp_phy_lane_power_ctrl(ctrl->phy, true, ctrl->lane_cnt); + + msm_edp_phy_vm_pe_init(ctrl->phy); + + /* Make sure phy is programed */ + wmb(); + msm_edp_phy_ready(ctrl->phy); + + edp_config_ctrl(ctrl); + msm_edp_ctrl_pixel_clock_valid(ctrl, ctrl->pixel_rate, &m, &n); + edp_sw_mvid_nvid(ctrl, m, n); + edp_mainlink_ctrl(ctrl, 1); + } else { + edp_mainlink_ctrl(ctrl, 0); + + msm_edp_phy_lane_power_ctrl(ctrl->phy, false, 0); + edp_clk_disable(ctrl, EDP_CLK_MASK_LINK_CHAN); + } +} + +static int edp_ctrl_training(struct edp_ctrl *ctrl) +{ + int ret; + + /* Do link training only when power is on */ + if (!ctrl->power_on) + return -EINVAL; + +train_start: + ret = edp_do_link_train(ctrl); + if (ret == EDP_TRAIN_RECONFIG) { + /* Re-configure main link */ + edp_ctrl_irq_enable(ctrl, 0); + edp_ctrl_link_enable(ctrl, 0); + msm_edp_phy_ctrl(ctrl->phy, 0); + + /* Make sure link is fully disabled */ + wmb(); + usleep_range(500, 1000); + + msm_edp_phy_ctrl(ctrl->phy, 1); + edp_ctrl_link_enable(ctrl, 1); + edp_ctrl_irq_enable(ctrl, 1); + goto train_start; + } + + return ret; +} + +static void edp_ctrl_on_worker(struct work_struct *work) +{ + struct edp_ctrl *ctrl = container_of( + work, struct edp_ctrl, on_work); + int ret; + + mutex_lock(&ctrl->dev_mutex); + + if (ctrl->power_on) { + DBG("already on"); + goto unlock_ret; + } + + edp_ctrl_phy_aux_enable(ctrl, 1); + edp_ctrl_link_enable(ctrl, 1); + + edp_ctrl_irq_enable(ctrl, 1); + ret = edp_sink_power_state(ctrl, DP_SET_POWER_D0); + if (ret) + goto fail; + + ctrl->power_on = true; + + /* Start link training */ + ret = edp_ctrl_training(ctrl); + if (ret != EDP_TRAIN_SUCCESS) + goto fail; + + DBG("DONE"); + goto unlock_ret; + +fail: + edp_ctrl_irq_enable(ctrl, 0); + edp_ctrl_link_enable(ctrl, 0); + edp_ctrl_phy_aux_enable(ctrl, 0); + ctrl->power_on = false; +unlock_ret: + mutex_unlock(&ctrl->dev_mutex); +} + +static void edp_ctrl_off_worker(struct work_struct *work) +{ + struct edp_ctrl *ctrl = container_of( + work, struct edp_ctrl, off_work); + int ret; + + mutex_lock(&ctrl->dev_mutex); + + if (!ctrl->power_on) { + DBG("already off"); + goto unlock_ret; + } + + reinit_completion(&ctrl->idle_comp); + edp_state_ctrl(ctrl, EDP_STATE_CTRL_PUSH_IDLE); + + ret = wait_for_completion_timeout(&ctrl->idle_comp, + msecs_to_jiffies(500)); + if (ret <= 0) + DBG("%s: idle pattern timedout, %d\n", + __func__, ret); + + edp_state_ctrl(ctrl, 0); + + edp_sink_power_state(ctrl, DP_SET_POWER_D3); + + edp_ctrl_irq_enable(ctrl, 0); + + edp_ctrl_link_enable(ctrl, 0); + + edp_ctrl_phy_aux_enable(ctrl, 0); + + ctrl->power_on = false; + +unlock_ret: + mutex_unlock(&ctrl->dev_mutex); +} + +irqreturn_t msm_edp_ctrl_irq(struct edp_ctrl *ctrl) +{ + u32 isr1, isr2, mask1, mask2; + u32 ack; + + DBG(""); + spin_lock(&ctrl->irq_lock); + isr1 = edp_read(ctrl->base + REG_EDP_INTERRUPT_REG_1); + isr2 = edp_read(ctrl->base + REG_EDP_INTERRUPT_REG_2); + + mask1 = isr1 & EDP_INTR_MASK1; + mask2 = isr2 & EDP_INTR_MASK2; + + isr1 &= ~mask1; /* remove masks bit */ + isr2 &= ~mask2; + + DBG("isr=%x mask=%x isr2=%x mask2=%x", + isr1, mask1, isr2, mask2); + + ack = isr1 & EDP_INTR_STATUS1; + ack <<= 1; /* ack bits */ + ack |= mask1; + edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_1, ack); + + ack = isr2 & EDP_INTR_STATUS2; + ack <<= 1; /* ack bits */ + ack |= mask2; + edp_write(ctrl->base + REG_EDP_INTERRUPT_REG_2, ack); + spin_unlock(&ctrl->irq_lock); + + if (isr1 & EDP_INTERRUPT_REG_1_HPD) + DBG("edp_hpd"); + + if (isr2 & EDP_INTERRUPT_REG_2_READY_FOR_VIDEO) + DBG("edp_video_ready"); + + if (isr2 & EDP_INTERRUPT_REG_2_IDLE_PATTERNs_SENT) { + DBG("idle_patterns_sent"); + complete(&ctrl->idle_comp); + } + + msm_edp_aux_irq(ctrl->aux, isr1); + + return IRQ_HANDLED; +} + +void msm_edp_ctrl_power(struct edp_ctrl *ctrl, bool on) +{ + if (on) + queue_work(ctrl->workqueue, &ctrl->on_work); + else + queue_work(ctrl->workqueue, &ctrl->off_work); +} + +int msm_edp_ctrl_init(struct msm_edp *edp) +{ + struct edp_ctrl *ctrl = NULL; + struct device *dev = &edp->pdev->dev; + int ret; + + if (!edp) { + pr_err("%s: edp is NULL!\n", __func__); + return -EINVAL; + } + + ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL); + if (!ctrl) + return -ENOMEM; + + edp->ctrl = ctrl; + ctrl->pdev = edp->pdev; + + ctrl->base = msm_ioremap(ctrl->pdev, "edp", "eDP"); + if (IS_ERR(ctrl->base)) + return PTR_ERR(ctrl->base); + + /* Get regulator, clock, gpio, pwm */ + ret = edp_regulator_init(ctrl); + if (ret) { + pr_err("%s:regulator init fail\n", __func__); + return ret; + } + ret = edp_clk_init(ctrl); + if (ret) { + pr_err("%s:clk init fail\n", __func__); + return ret; + } + ret = edp_gpio_config(ctrl); + if (ret) { + pr_err("%s:failed to configure GPIOs: %d", __func__, ret); + return ret; + } + + /* Init aux and phy */ + ctrl->aux = msm_edp_aux_init(dev, ctrl->base, &ctrl->drm_aux); + if (!ctrl->aux || !ctrl->drm_aux) { + pr_err("%s:failed to init aux\n", __func__); + return ret; + } + + ctrl->phy = msm_edp_phy_init(dev, ctrl->base); + if (!ctrl->phy) { + pr_err("%s:failed to init phy\n", __func__); + goto err_destory_aux; + } + + spin_lock_init(&ctrl->irq_lock); + mutex_init(&ctrl->dev_mutex); + init_completion(&ctrl->idle_comp); + + /* setup workqueue */ + ctrl->workqueue = alloc_ordered_workqueue("edp_drm_work", 0); + INIT_WORK(&ctrl->on_work, edp_ctrl_on_worker); + INIT_WORK(&ctrl->off_work, edp_ctrl_off_worker); + + return 0; + +err_destory_aux: + msm_edp_aux_destroy(dev, ctrl->aux); + ctrl->aux = NULL; + return ret; +} + +void msm_edp_ctrl_destroy(struct edp_ctrl *ctrl) +{ + if (!ctrl) + return; + + if (ctrl->workqueue) { + flush_workqueue(ctrl->workqueue); + destroy_workqueue(ctrl->workqueue); + ctrl->workqueue = NULL; + } + + if (ctrl->aux) { + msm_edp_aux_destroy(&ctrl->pdev->dev, ctrl->aux); + ctrl->aux = NULL; + } + + kfree(ctrl->edid); + ctrl->edid = NULL; + + mutex_destroy(&ctrl->dev_mutex); +} + +bool msm_edp_ctrl_panel_connected(struct edp_ctrl *ctrl) +{ + mutex_lock(&ctrl->dev_mutex); + DBG("connect status = %d", ctrl->edp_connected); + if (ctrl->edp_connected) { + mutex_unlock(&ctrl->dev_mutex); + return true; + } + + if (!ctrl->power_on) { + edp_ctrl_phy_aux_enable(ctrl, 1); + edp_ctrl_irq_enable(ctrl, 1); + } + + if (drm_dp_dpcd_read(ctrl->drm_aux, DP_DPCD_REV, ctrl->dpcd, + DP_RECEIVER_CAP_SIZE) < DP_RECEIVER_CAP_SIZE) { + pr_err("%s: AUX channel is NOT ready\n", __func__); + memset(ctrl->dpcd, 0, DP_RECEIVER_CAP_SIZE); + } else { + ctrl->edp_connected = true; + } + + if (!ctrl->power_on) { + edp_ctrl_irq_enable(ctrl, 0); + edp_ctrl_phy_aux_enable(ctrl, 0); + } + + DBG("exit: connect status=%d", ctrl->edp_connected); + + mutex_unlock(&ctrl->dev_mutex); + + return ctrl->edp_connected; +} + +int msm_edp_ctrl_get_panel_info(struct edp_ctrl *ctrl, + struct drm_connector *connector, struct edid **edid) +{ + int ret = 0; + + mutex_lock(&ctrl->dev_mutex); + + if (ctrl->edid) { + if (edid) { + DBG("Just return edid buffer"); + *edid = ctrl->edid; + } + goto unlock_ret; + } + + if (!ctrl->power_on) { + edp_ctrl_phy_aux_enable(ctrl, 1); + edp_ctrl_irq_enable(ctrl, 1); + } + + ret = drm_dp_link_probe(ctrl->drm_aux, &ctrl->dp_link); + if (ret) { + pr_err("%s: read dpcd cap failed, %d\n", __func__, ret); + goto disable_ret; + } + + /* Initialize link rate as panel max link rate */ + ctrl->link_rate = drm_dp_link_rate_to_bw_code(ctrl->dp_link.rate); + + ctrl->edid = drm_get_edid(connector, &ctrl->drm_aux->ddc); + if (!ctrl->edid) { + pr_err("%s: edid read fail\n", __func__); + goto disable_ret; + } + + if (edid) + *edid = ctrl->edid; + +disable_ret: + if (!ctrl->power_on) { + edp_ctrl_irq_enable(ctrl, 0); + edp_ctrl_phy_aux_enable(ctrl, 0); + } +unlock_ret: + mutex_unlock(&ctrl->dev_mutex); + return ret; +} + +int msm_edp_ctrl_timing_cfg(struct edp_ctrl *ctrl, + const struct drm_display_mode *mode, + const struct drm_display_info *info) +{ + u32 hstart_from_sync, vstart_from_sync; + u32 data; + int ret = 0; + + mutex_lock(&ctrl->dev_mutex); + /* + * Need to keep color depth, pixel rate and + * interlaced information in ctrl context + */ + ctrl->color_depth = info->bpc; + ctrl->pixel_rate = mode->clock; + ctrl->interlaced = !!(mode->flags & DRM_MODE_FLAG_INTERLACE); + + /* Fill initial link config based on passed in timing */ + edp_fill_link_cfg(ctrl); + + if (edp_clk_enable(ctrl, EDP_CLK_MASK_AHB)) { + pr_err("%s, fail to prepare enable ahb clk\n", __func__); + ret = -EINVAL; + goto unlock_ret; + } + edp_clock_synchrous(ctrl, 1); + + /* Configure eDP timing to HW */ + edp_write(ctrl->base + REG_EDP_TOTAL_HOR_VER, + EDP_TOTAL_HOR_VER_HORIZ(mode->htotal) | + EDP_TOTAL_HOR_VER_VERT(mode->vtotal)); + + vstart_from_sync = mode->vtotal - mode->vsync_start; + hstart_from_sync = mode->htotal - mode->hsync_start; + edp_write(ctrl->base + REG_EDP_START_HOR_VER_FROM_SYNC, + EDP_START_HOR_VER_FROM_SYNC_HORIZ(hstart_from_sync) | + EDP_START_HOR_VER_FROM_SYNC_VERT(vstart_from_sync)); + + data = EDP_HSYNC_VSYNC_WIDTH_POLARITY_VERT( + mode->vsync_end - mode->vsync_start); + data |= EDP_HSYNC_VSYNC_WIDTH_POLARITY_HORIZ( + mode->hsync_end - mode->hsync_start); + if (mode->flags & DRM_MODE_FLAG_NVSYNC) + data |= EDP_HSYNC_VSYNC_WIDTH_POLARITY_NVSYNC; + if (mode->flags & DRM_MODE_FLAG_NHSYNC) + data |= EDP_HSYNC_VSYNC_WIDTH_POLARITY_NHSYNC; + edp_write(ctrl->base + REG_EDP_HSYNC_VSYNC_WIDTH_POLARITY, data); + + edp_write(ctrl->base + REG_EDP_ACTIVE_HOR_VER, + EDP_ACTIVE_HOR_VER_HORIZ(mode->hdisplay) | + EDP_ACTIVE_HOR_VER_VERT(mode->vdisplay)); + + edp_clk_disable(ctrl, EDP_CLK_MASK_AHB); + +unlock_ret: + mutex_unlock(&ctrl->dev_mutex); + return ret; +} + +bool msm_edp_ctrl_pixel_clock_valid(struct edp_ctrl *ctrl, + u32 pixel_rate, u32 *pm, u32 *pn) +{ + const struct edp_pixel_clk_div *divs; + u32 err = 1; /* 1% error tolerance */ + u32 clk_err; + int i; + + if (ctrl->link_rate == DP_LINK_BW_1_62) { + divs = clk_divs[0]; + } else if (ctrl->link_rate == DP_LINK_BW_2_7) { + divs = clk_divs[1]; + } else { + pr_err("%s: Invalid link rate,%d\n", __func__, ctrl->link_rate); + return false; + } + + for (i = 0; i < EDP_PIXEL_CLK_NUM; i++) { + clk_err = abs(divs[i].rate - pixel_rate); + if ((divs[i].rate * err / 100) >= clk_err) { + if (pm) + *pm = divs[i].m; + if (pn) + *pn = divs[i].n; + return true; + } + } + + DBG("pixel clock %d(kHz) not supported", pixel_rate); + + return false; +} + diff --git a/drivers/gpu/drm/msm/edp/edp_phy.c b/drivers/gpu/drm/msm/edp/edp_phy.c new file mode 100644 index 0000000..36bb893 --- /dev/null +++ b/drivers/gpu/drm/msm/edp/edp_phy.c @@ -0,0 +1,106 @@ +/* + * Copyright (c) 2014-2015, 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 "edp.h" +#include "edp.xml.h" + +#define EDP_MAX_LANE 4 + +struct edp_phy { + void __iomem *base; +}; + +bool msm_edp_phy_ready(struct edp_phy *phy) +{ + u32 status; + int cnt = 100; + + while (--cnt) { + status = edp_read(phy->base + + REG_EDP_PHY_GLB_PHY_STATUS); + if (status & 0x01) + break; + usleep_range(500, 1000); + } + + if (cnt == 0) { + pr_err("%s: PHY NOT ready\n", __func__); + return false; + } else { + return true; + } +} + +void msm_edp_phy_ctrl(struct edp_phy *phy, int enable) +{ + DBG("enable=%d", enable); + if (enable) { + /* Reset */ + edp_write(phy->base + REG_EDP_PHY_CTRL, + EDP_PHY_CTRL_SW_RESET | EDP_PHY_CTRL_SW_RESET_PLL); + /* Make sure fully reset */ + wmb(); + usleep_range(500, 1000); + edp_write(phy->base + REG_EDP_PHY_CTRL, 0x000); + edp_write(phy->base + REG_EDP_PHY_GLB_PD_CTL, 0x3f); + edp_write(phy->base + REG_EDP_PHY_GLB_CFG, 0x1); + } else { + edp_write(phy->base + REG_EDP_PHY_GLB_PD_CTL, 0xc0); + } +} + +/* voltage mode and pre emphasis cfg */ +void msm_edp_phy_vm_pe_init(struct edp_phy *phy) +{ + edp_write(phy->base + REG_EDP_PHY_GLB_VM_CFG0, 0x3); + edp_write(phy->base + REG_EDP_PHY_GLB_VM_CFG1, 0x64); + edp_write(phy->base + REG_EDP_PHY_GLB_MISC9, 0x6c); +} + +void msm_edp_phy_vm_pe_cfg(struct edp_phy *phy, u32 v0, u32 v1) +{ + edp_write(phy->base + REG_EDP_PHY_GLB_VM_CFG0, v0); + edp_write(phy->base + REG_EDP_PHY_GLB_VM_CFG1, v1); +} + +void msm_edp_phy_lane_power_ctrl(struct edp_phy *phy, bool up, u32 max_lane) +{ + u32 i; + u32 data; + + if (up) + data = 0; /* power up */ + else + data = 0x7; /* power down */ + + for (i = 0; i < max_lane; i++) + edp_write(phy->base + REG_EDP_PHY_LN_PD_CTL(i) , data); + + /* power down unused lane */ + data = 0x7; /* power down */ + for (i = max_lane; i < EDP_MAX_LANE; i++) + edp_write(phy->base + REG_EDP_PHY_LN_PD_CTL(i) , data); +} + +void *msm_edp_phy_init(struct device *dev, void __iomem *regbase) +{ + struct edp_phy *phy = NULL; + + phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL); + if (!phy) + return NULL; + + phy->base = regbase; + return phy; +} + diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h index 1363038..3b25dd8 100644 --- a/drivers/gpu/drm/msm/msm_drv.h +++ b/drivers/gpu/drm/msm/msm_drv.h @@ -76,6 +76,12 @@ struct msm_drm_private { */ struct hdmi *hdmi;

+ /* eDP is for mdp5 only, but kms has not been created + * when edp_bind() and edp_init() are called. Here is the only + * place to keep the edp instance. + */ + struct msm_edp *edp; + /* when we have more than one 'msm_gpu' these need to be an array: */ struct msm_gpu *gpu; struct msm_file_private *lastctx;