Commit ab5b0107 authored by Hai Li's avatar Hai Li Committed by Rob Clark

drm/msm: Initial add eDP support in msm drm driver (v5)

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: default avatarHai Li <hali@codeaurora.org>
[robclark: v5: rebase on drm_bridge changes in drm-next]
Signed-off-by: default avatarRob Clark <robdclark@gmail.com>
parent b1b1c74e
...@@ -16,6 +16,12 @@ msm-y := \ ...@@ -16,6 +16,12 @@ msm-y := \
hdmi/hdmi_phy_8960.o \ hdmi/hdmi_phy_8960.o \
hdmi/hdmi_phy_8x60.o \ hdmi/hdmi_phy_8x60.o \
hdmi/hdmi_phy_8x74.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_format.o \
mdp/mdp_kms.o \ mdp/mdp_kms.o \
mdp/mdp4/mdp4_crtc.o \ mdp/mdp4/mdp4_crtc.o \
......
/*
* 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_destroy(edp->bridge);
edp->bridge = NULL;
}
if (edp->connector) {
edp->connector->funcs->destroy(edp->connector);
edp->connector = NULL;
}
return ret;
}
/*
* 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);
void edp_bridge_destroy(struct drm_bridge *bridge);
/* 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__ */
/*
* 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);
}
}
/*
* 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)
void edp_bridge_destroy(struct drm_bridge *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,
};
/* 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 = devm_kzalloc(edp->dev->dev,
sizeof(*edp_bridge), GFP_KERNEL);
if (!edp_bridge) {
ret = -ENOMEM;
goto fail;
}
edp_bridge->edp = edp;
bridge = &edp_bridge->base;
bridge->funcs = &edp_bridge_funcs;
ret = drm_bridge_attach(edp->dev, bridge);
if (ret)
goto fail;
return bridge;
fail:
if (bridge)
edp_bridge_destroy(bridge);
return ERR_PTR(ret);
}
/*
* 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_atomic_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);
}
This diff is collapsed.
/*
* 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;
}
...@@ -76,6 +76,12 @@ struct msm_drm_private { ...@@ -76,6 +76,12 @@ struct msm_drm_private {
*/ */
struct hdmi *hdmi; 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: */ /* when we have more than one 'msm_gpu' these need to be an array: */
struct msm_gpu *gpu; struct msm_gpu *gpu;
struct msm_file_private *lastctx; struct msm_file_private *lastctx;
......
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