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/* Copyright (c) 2011-2016, 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/init.h>
#include <linux/ioctl.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/msm_mdp.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/types.h>
#include <linux/version.h>
#include <linux/switch.h>
#include "mdss_panel.h"
#include "mdss_wb.h"
#include "mdss.h"
/**
* mdss_wb_check_params - check new panel info params
* @pdata: current panel information
* @new: updates to panel info
*
* Checks if there are any changes that require panel reconfiguration
* in order to be reflected on writeback buffer.
*
* Return negative errno if invalid input, zero if there is no panel reconfig
* needed and non-zero if reconfiguration is needed.
*/
static int mdss_wb_check_params(struct mdss_panel_data *pdata,
struct mdss_panel_info *new)
{
struct mdss_panel_info *old;
if (!pdata || !new) {
pr_err("%s: Invalid input\n", __func__);
return -EINVAL;
}
if (new->xres >= 4096 || new->yres >= 4096) {
pr_err("%s: Invalid resolutions\n", __func__);
return -EINVAL;
}
old = &pdata->panel_info;
if ((old->xres != new->xres) || (old->yres != new->yres))
return 1;
return 0;
}
static int mdss_wb_event_handler(struct mdss_panel_data *pdata,
int event, void *arg)
{
int rc = 0;
switch (event) {
case MDSS_EVENT_CHECK_PARAMS:
rc = mdss_wb_check_params(pdata, (struct mdss_panel_info *)arg);
break;
default:
pr_debug("%s: panel event (%d) not handled\n", __func__, event);
break;
}
return rc;
}
static int mdss_wb_parse_dt(struct platform_device *pdev,
struct mdss_panel_data *pdata)
{
struct device_node *np = pdev->dev.of_node;
u32 res[2], tmp;
int rc;
rc = of_property_read_u32_array(np, "qcom,mdss_pan_res", res, 2);
pdata->panel_info.xres = (!rc ? res[0] : 1280);
pdata->panel_info.yres = (!rc ? res[1] : 720);
rc = of_property_read_u32(np, "qcom,mdss_pan_bpp", &tmp);
pdata->panel_info.bpp = (!rc ? tmp : 24);
return 0;
}
static int mdss_wb_dev_init(struct mdss_wb_ctrl *wb_ctrl)
{
int rc = 0;
if (!wb_ctrl) {
pr_err("%s: no driver data\n", __func__);
return -ENODEV;
}
wb_ctrl->sdev.name = "wfd";
rc = switch_dev_register(&wb_ctrl->sdev);
if (rc) {
pr_err("Failed to setup switch dev for writeback panel");
return rc;
}
return 0;
}
static int mdss_wb_dev_uninit(struct mdss_wb_ctrl *wb_ctrl)
{
if (!wb_ctrl) {
pr_err("%s: no driver data\n", __func__);
return -ENODEV;
}
switch_dev_unregister(&wb_ctrl->sdev);
return 0;
}
static int mdss_wb_probe(struct platform_device *pdev)
{
struct mdss_panel_data *pdata = NULL;
struct mdss_wb_ctrl *wb_ctrl = NULL;
struct mdss_util_intf *util;
int rc = 0;
if (!pdev->dev.of_node)
return -ENODEV;
util = mdss_get_util_intf();
if (util == NULL) {
pr_err("%s: Failed to get mdss utility functions\n", __func__);
return -ENODEV;
}
if (!util->mdp_probe_done) {
pr_err("%s: MDP not probed yet!\n", __func__);
return -EPROBE_DEFER;
}
wb_ctrl = devm_kzalloc(&pdev->dev, sizeof(*wb_ctrl), GFP_KERNEL);
if (!wb_ctrl)
return -ENOMEM;
pdata = &wb_ctrl->pdata;
wb_ctrl->pdev = pdev;
platform_set_drvdata(pdev, wb_ctrl);
rc = !mdss_wb_parse_dt(pdev, pdata);
if (!rc)
goto error_no_mem;
rc = mdss_wb_dev_init(wb_ctrl);
if (rc) {
dev_err(&pdev->dev, "unable to set up device nodes for writeback panel\n");
goto error_no_mem;
}
pdata->panel_info.type = WRITEBACK_PANEL;
pdata->panel_info.clk_rate = 74250000;
pdata->panel_info.pdest = DISPLAY_4;
pdata->panel_info.out_format = MDP_Y_CBCR_H2V2_VENUS;
pdata->event_handler = mdss_wb_event_handler;
pdev->dev.platform_data = pdata;
rc = mdss_register_panel(pdev, pdata);
if (rc) {
dev_err(&pdev->dev, "unable to register writeback panel\n");
goto error_init;
}
return rc;
error_init:
mdss_wb_dev_uninit(wb_ctrl);
error_no_mem:
devm_kfree(&pdev->dev, wb_ctrl);
return rc;
}
static int mdss_wb_remove(struct platform_device *pdev)
{
struct mdss_wb_ctrl *wb_ctrl = platform_get_drvdata(pdev);
if (!wb_ctrl) {
pr_err("%s: no driver data\n", __func__);
return -ENODEV;
}
mdss_wb_dev_uninit(wb_ctrl);
devm_kfree(&wb_ctrl->pdev->dev, wb_ctrl);
return 0;
}
static const struct of_device_id mdss_wb_match[] = {
{ .compatible = "qcom,mdss_wb", },
{ { 0 } }
};
static struct platform_driver mdss_wb_driver = {
.probe = mdss_wb_probe,
.remove = mdss_wb_remove,
.driver = {
.name = "mdss_wb",
.of_match_table = mdss_wb_match,
},
};
static int __init mdss_wb_driver_init(void)
{
int rc = 0;
rc = platform_driver_register(&mdss_wb_driver);
return rc;
}
module_init(mdss_wb_driver_init);
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