blob: 17c1fc6a2d44a8e97699b1ff6c773acf7fa86c4d [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
*/
#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__
#include <linux/clk.h>
#include <linux/clk-provider.h>
#include <linux/regulator/consumer.h>
#include "dp_power.h"
#include "msm_drv.h"
struct dp_power_private {
struct dp_parser *parser;
struct platform_device *pdev;
struct clk *link_clk_src;
struct clk *pixel_provider;
struct clk *link_provider;
struct regulator_bulk_data supplies[DP_DEV_REGULATOR_MAX];
struct dp_power dp_power;
};
static void dp_power_regulator_disable(struct dp_power_private *power)
{
struct regulator_bulk_data *s = power->supplies;
const struct dp_reg_entry *regs = power->parser->regulator_cfg->regs;
int num = power->parser->regulator_cfg->num;
int i;
DBG("");
for (i = num - 1; i >= 0; i--)
if (regs[i].disable_load >= 0)
regulator_set_load(s[i].consumer,
regs[i].disable_load);
regulator_bulk_disable(num, s);
}
static int dp_power_regulator_enable(struct dp_power_private *power)
{
struct regulator_bulk_data *s = power->supplies;
const struct dp_reg_entry *regs = power->parser->regulator_cfg->regs;
int num = power->parser->regulator_cfg->num;
int ret, i;
DBG("");
for (i = 0; i < num; i++) {
if (regs[i].enable_load >= 0) {
ret = regulator_set_load(s[i].consumer,
regs[i].enable_load);
if (ret < 0) {
pr_err("regulator %d set op mode failed, %d\n",
i, ret);
goto fail;
}
}
}
ret = regulator_bulk_enable(num, s);
if (ret < 0) {
pr_err("regulator enable failed, %d\n", ret);
goto fail;
}
return 0;
fail:
for (i--; i >= 0; i--)
regulator_set_load(s[i].consumer, regs[i].disable_load);
return ret;
}
static int dp_power_regulator_init(struct dp_power_private *power)
{
struct regulator_bulk_data *s = power->supplies;
const struct dp_reg_entry *regs = power->parser->regulator_cfg->regs;
struct platform_device *pdev = power->pdev;
int num = power->parser->regulator_cfg->num;
int i, ret;
for (i = 0; i < num; i++)
s[i].supply = regs[i].name;
ret = devm_regulator_bulk_get(&pdev->dev, num, s);
if (ret < 0) {
pr_err("%s: failed to init regulator, ret=%d\n",
__func__, ret);
return ret;
}
return 0;
}
static int dp_power_clk_init(struct dp_power_private *power)
{
int rc = 0;
struct dss_module_power *core, *ctrl, *stream;
struct device *dev = &power->pdev->dev;
core = &power->parser->mp[DP_CORE_PM];
ctrl = &power->parser->mp[DP_CTRL_PM];
stream = &power->parser->mp[DP_STREAM_PM];
rc = msm_dss_get_clk(dev, core->clk_config, core->num_clk);
if (rc) {
DRM_ERROR("failed to get %s clk. err=%d\n",
dp_parser_pm_name(DP_CORE_PM), rc);
return rc;
}
rc = msm_dss_get_clk(dev, ctrl->clk_config, ctrl->num_clk);
if (rc) {
DRM_ERROR("failed to get %s clk. err=%d\n",
dp_parser_pm_name(DP_CTRL_PM), rc);
msm_dss_put_clk(core->clk_config, core->num_clk);
return -ENODEV;
}
rc = msm_dss_get_clk(dev, stream->clk_config, stream->num_clk);
if (rc) {
DRM_ERROR("failed to get %s clk. err=%d\n",
dp_parser_pm_name(DP_CTRL_PM), rc);
msm_dss_put_clk(core->clk_config, core->num_clk);
return -ENODEV;
}
return 0;
}
static int dp_power_clk_deinit(struct dp_power_private *power)
{
struct dss_module_power *core, *ctrl, *stream;
core = &power->parser->mp[DP_CORE_PM];
ctrl = &power->parser->mp[DP_CTRL_PM];
stream = &power->parser->mp[DP_STREAM_PM];
if (!core || !ctrl || !stream) {
DRM_ERROR("invalid power_data\n");
return -EINVAL;
}
msm_dss_put_clk(ctrl->clk_config, ctrl->num_clk);
msm_dss_put_clk(core->clk_config, core->num_clk);
msm_dss_put_clk(stream->clk_config, stream->num_clk);
return 0;
}
static int dp_power_clk_set_rate(struct dp_power_private *power,
enum dp_pm_type module, bool enable)
{
int rc = 0;
struct dss_module_power *mp = &power->parser->mp[module];
if (enable) {
rc = msm_dss_clk_set_rate(mp->clk_config, mp->num_clk);
if (rc) {
DRM_ERROR("failed to set clks rate.\n");
return rc;
}
}
rc = msm_dss_enable_clk(mp->clk_config, mp->num_clk, enable);
if (rc) {
DRM_ERROR("failed to %d clks, err: %d\n", enable, rc);
return rc;
}
return 0;
}
int dp_power_clk_status(struct dp_power *dp_power, enum dp_pm_type pm_type)
{
if (pm_type == DP_CORE_PM)
return dp_power->core_clks_on;
if (pm_type == DP_CTRL_PM)
return dp_power->link_clks_on;
if (pm_type == DP_STREAM_PM)
return dp_power->stream_clks_on;
return 0;
}
int dp_power_clk_enable(struct dp_power *dp_power,
enum dp_pm_type pm_type, bool enable)
{
int rc = 0;
struct dp_power_private *power;
power = container_of(dp_power, struct dp_power_private, dp_power);
if (pm_type != DP_CORE_PM && pm_type != DP_CTRL_PM &&
pm_type != DP_STREAM_PM) {
DRM_ERROR("unsupported power module: %s\n",
dp_parser_pm_name(pm_type));
return -EINVAL;
}
if (enable) {
if (pm_type == DP_CORE_PM && dp_power->core_clks_on) {
DRM_DEBUG_DP("core clks already enabled\n");
return 0;
}
if (pm_type == DP_CTRL_PM && dp_power->link_clks_on) {
DRM_DEBUG_DP("links clks already enabled\n");
return 0;
}
if (pm_type == DP_STREAM_PM && dp_power->stream_clks_on) {
DRM_DEBUG_DP("pixel clks already enabled\n");
return 0;
}
if ((pm_type == DP_CTRL_PM) && (!dp_power->core_clks_on)) {
DRM_DEBUG_DP("Enable core clks before link clks\n");
rc = dp_power_clk_set_rate(power, DP_CORE_PM, enable);
if (rc) {
DRM_ERROR("fail to enable clks: %s. err=%d\n",
dp_parser_pm_name(DP_CORE_PM), rc);
return rc;
}
dp_power->core_clks_on = true;
}
}
rc = dp_power_clk_set_rate(power, pm_type, enable);
if (rc) {
DRM_ERROR("failed to '%s' clks for: %s. err=%d\n",
enable ? "enable" : "disable",
dp_parser_pm_name(pm_type), rc);
return rc;
}
if (pm_type == DP_CORE_PM)
dp_power->core_clks_on = enable;
else if (pm_type == DP_STREAM_PM)
dp_power->stream_clks_on = enable;
else
dp_power->link_clks_on = enable;
DRM_DEBUG_DP("%s clocks for %s\n",
enable ? "enable" : "disable",
dp_parser_pm_name(pm_type));
DRM_DEBUG_DP("strem_clks:%s link_clks:%s core_clks:%s\n",
dp_power->stream_clks_on ? "on" : "off",
dp_power->link_clks_on ? "on" : "off",
dp_power->core_clks_on ? "on" : "off");
return 0;
}
int dp_power_client_init(struct dp_power *dp_power)
{
int rc = 0;
struct dp_power_private *power;
if (!dp_power) {
DRM_ERROR("invalid power data\n");
return -EINVAL;
}
power = container_of(dp_power, struct dp_power_private, dp_power);
pm_runtime_enable(&power->pdev->dev);
rc = dp_power_regulator_init(power);
if (rc) {
DRM_ERROR("failed to init regulators %d\n", rc);
goto error;
}
rc = dp_power_clk_init(power);
if (rc) {
DRM_ERROR("failed to init clocks %d\n", rc);
goto error;
}
return 0;
error:
pm_runtime_disable(&power->pdev->dev);
return rc;
}
void dp_power_client_deinit(struct dp_power *dp_power)
{
struct dp_power_private *power;
if (!dp_power) {
DRM_ERROR("invalid power data\n");
return;
}
power = container_of(dp_power, struct dp_power_private, dp_power);
dp_power_clk_deinit(power);
pm_runtime_disable(&power->pdev->dev);
}
int dp_power_init(struct dp_power *dp_power, bool flip)
{
int rc = 0;
struct dp_power_private *power = NULL;
if (!dp_power) {
DRM_ERROR("invalid power data\n");
return -EINVAL;
}
power = container_of(dp_power, struct dp_power_private, dp_power);
pm_runtime_get_sync(&power->pdev->dev);
rc = dp_power_regulator_enable(power);
if (rc) {
DRM_ERROR("failed to enable regulators, %d\n", rc);
goto exit;
}
rc = dp_power_clk_enable(dp_power, DP_CORE_PM, true);
if (rc) {
DRM_ERROR("failed to enable DP core clocks, %d\n", rc);
goto err_clk;
}
return 0;
err_clk:
dp_power_regulator_disable(power);
exit:
pm_runtime_put_sync(&power->pdev->dev);
return rc;
}
int dp_power_deinit(struct dp_power *dp_power)
{
struct dp_power_private *power;
power = container_of(dp_power, struct dp_power_private, dp_power);
dp_power_clk_enable(dp_power, DP_CORE_PM, false);
dp_power_regulator_disable(power);
pm_runtime_put_sync(&power->pdev->dev);
return 0;
}
struct dp_power *dp_power_get(struct dp_parser *parser)
{
struct dp_power_private *power;
struct dp_power *dp_power;
if (!parser) {
DRM_ERROR("invalid input\n");
return ERR_PTR(-EINVAL);
}
power = devm_kzalloc(&parser->pdev->dev, sizeof(*power), GFP_KERNEL);
if (!power)
return ERR_PTR(-ENOMEM);
power->parser = parser;
power->pdev = parser->pdev;
dp_power = &power->dp_power;
return dp_power;
}