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Message-ID: <22c1b098-ae28-5c0d-c1d0-2d09a5a5c1c0@quicinc.com>
Date: Fri, 6 Oct 2023 13:44:23 -0700
From: Kuogee Hsieh <quic_khsieh@...cinc.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
<dri-devel@...ts.freedesktop.org>, <robdclark@...il.com>,
<sean@...rly.run>, <swboyd@...omium.org>, <dianders@...omium.org>,
<vkoul@...nel.org>, <daniel@...ll.ch>, <airlied@...il.com>,
<agross@...nel.org>, <andersson@...nel.org>
CC: <quic_abhinavk@...cinc.com>, <quic_jesszhan@...cinc.com>,
<quic_sbillaka@...cinc.com>, <marijn.suijten@...ainline.org>,
<freedreno@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 5/7] drm/msm/dp: incorporate pm_runtime framework into
DP driver
On 10/6/2023 11:04 AM, Dmitry Baryshkov wrote:
> On 06/10/2023 19:42, Kuogee Hsieh wrote:
>>
>> On 10/6/2023 4:56 AM, Dmitry Baryshkov wrote:
>>> On 04/10/2023 19:26, Kuogee Hsieh wrote:
>>>> Currently DP driver is executed independent of PM runtime framework.
>>>> This leads msm eDP panel can not being detected by edp_panel driver
>>>> during
>>>> generic_edp_panel_probe() due to AUX DPCD read failed at edp panel
>>>> driver.
>>>> Incorporate PM runtime framework into DP driver so that host
>>>> controller's
>>>> power and clocks are enable/disable through PM runtime mechanism.
>>>> Once PM runtime framework is incorporated into DP driver, waking up
>>>> device
>>>> from power up path is not necessary. Hence remove it.
>>>>
>>>> After incorporating pm_runtime framework into eDP/DP driver,
>>>> dp_pm_suspend()
>>>> to handle power off both DP phy and controller during suspend and
>>>> dp_pm_resume() to handle power on both DP phy and controller during
>>>> resume
>>>> are not necessary. Therefore both dp_pm_suspend() and
>>>> dp_pm_resume() are
>>>> dropped and replace with dp_pm_runtime_suspend() and
>>>> dp_pm_runtime_resume()
>>>> respectively.
>>>>
>>>> Changes in v5:
>>>> -- remove pm_runtime_put_autosuspend feature, use
>>>> pm_runtime_put_sync() directly
>>>> -- squash add pm_runtime_force_suspend()/resume() patch into this
>>>> patch
>>>
>>> Ok, this is much better now. Thank you!
>>>
>>>>
>>>> Changes in v4:
>>>> -- reworded commit text to explain why pm_framework is required for
>>>> edp panel
>>>> -- reworded commit text to explain autosuspend is choiced
>>>> -- delete EV_POWER_PM_GET and PM_EV_POWER_PUT from changes #3
>>>> -- delete dp_display_pm_get() and dp_display_pm_Put() from changes #3
>>>> -- return value from pm_runtime_resume_and_get() directly
>>>> -- check return value of devm_pm_runtime_enable()
>>>> -- delete pm_runtime_xxx from dp_display_remove()
>>>> -- drop dp_display_host_init() from EV_HPD_INIT_SETUP
>>>> -- drop both dp_pm_prepare() and dp_pm_compete() from this change
>>>> -- delete ST_SUSPENDED state
>>>> -- rewording commit text to add more details regrading the purpose
>>>> of this change
>>>>
>>>> Changes in v3:
>>>> -- incorporate removing pm_runtime_xx() from dp_pwer.c to this patch
>>>> -- use pm_runtime_resume_and_get() instead of pm_runtime_get()
>>>> -- error checking pm_runtime_resume_and_get() return value
>>>> -- add EV_POWER_PM_GET and PM_EV_POWER_PUT to handle HPD_GPIO case
>>>> -- replace dp_pm_suspend() with pm_runtime_force_suspend()
>>>> -- replace dp_pm_resume() with pm_runtime_force_resume()
>>>>
>>>> Signed-off-by: Kuogee Hsieh <quic_khsieh@...cinc.com>
>>>> Reported-by: kernel test robot <lkp@...el.com>
>>>> ---
>>>> drivers/gpu/drm/msm/dp/dp_aux.c | 5 ++
>>>> drivers/gpu/drm/msm/dp/dp_display.c | 166
>>>> ++++++++++++------------------------
>>>> drivers/gpu/drm/msm/dp/dp_power.c | 16 ----
>>>> drivers/gpu/drm/msm/dp/dp_power.h | 11 ---
>>>> 4 files changed, 59 insertions(+), 139 deletions(-)
>>>>
>>>> diff --git a/drivers/gpu/drm/msm/dp/dp_aux.c
>>>> b/drivers/gpu/drm/msm/dp/dp_aux.c
>>>> index 8e3b677..10b6eeb 100644
>>>> --- a/drivers/gpu/drm/msm/dp/dp_aux.c
>>>> +++ b/drivers/gpu/drm/msm/dp/dp_aux.c
>>>> @@ -291,6 +291,10 @@ static ssize_t dp_aux_transfer(struct
>>>> drm_dp_aux *dp_aux,
>>>> return -EINVAL;
>>>> }
>>>> + ret = pm_runtime_resume_and_get(dp_aux->dev);
>>>> + if (ret)
>>>> + return ret;
>>>> +
>>>> mutex_lock(&aux->mutex);
>>>> if (!aux->initted) {
>>>> ret = -EIO;
>>>> @@ -364,6 +368,7 @@ static ssize_t dp_aux_transfer(struct
>>>> drm_dp_aux *dp_aux,
>>>> exit:
>>>> mutex_unlock(&aux->mutex);
>>>> + pm_runtime_put_sync(dp_aux->dev);
>>>> return ret;
>>>> }
>>>> diff --git a/drivers/gpu/drm/msm/dp/dp_display.c
>>>> b/drivers/gpu/drm/msm/dp/dp_display.c
>>>> index e4942fc..42efe148b 100644
>>>> --- a/drivers/gpu/drm/msm/dp/dp_display.c
>>>> +++ b/drivers/gpu/drm/msm/dp/dp_display.c
>>>> @@ -49,7 +49,6 @@ enum {
>>>> ST_CONNECTED,
>>>> ST_DISCONNECT_PENDING,
>>>> ST_DISPLAY_OFF,
>>>> - ST_SUSPENDED,
>>>> };
>>>> enum {
>>>> @@ -310,15 +309,10 @@ static void dp_display_unbind(struct device
>>>> *dev, struct device *master,
>>>> struct dp_display_private *dp = dev_get_dp_display_private(dev);
>>>> struct msm_drm_private *priv = dev_get_drvdata(master);
>>>> - /* disable all HPD interrupts */
>>>> - if (dp->core_initialized)
>>>> - dp_catalog_hpd_config_intr(dp->catalog,
>>>> DP_DP_HPD_INT_MASK, false);
>>>> -
>>>> kthread_stop(dp->ev_tsk);
>>>> of_dp_aux_depopulate_bus(dp->aux);
>>>> - dp_power_client_deinit(dp->power);
>>>> dp_unregister_audio_driver(dev, dp->audio);
>>>> dp_aux_unregister(dp->aux);
>>>> dp->drm_dev = NULL;
>>>> @@ -559,7 +553,7 @@ static int dp_hpd_plug_handle(struct
>>>> dp_display_private *dp, u32 data)
>>>> drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
>>>> dp->dp_display.connector_type, state);
>>>> - if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
>>>> + if (state == ST_DISPLAY_OFF) {
>>>> mutex_unlock(&dp->event_mutex);
>>>> return 0;
>>>> }
>>>> @@ -576,6 +570,14 @@ static int dp_hpd_plug_handle(struct
>>>> dp_display_private *dp, u32 data)
>>>> return 0;
>>>> }
>>>> + if (!dp->dp_display.is_edp) {
>>>
>>> Why?
>>
>> This is mainly for hpd_internal == false case (any possible way of
>> delivering an HPD event)
>>
>> for both eDP and "hpd_internal == true" cases,
>> pm_runtime_resume_and_get() had been called already.
>>
>> will it better? if it was removed the condition
>> (dp->dp_display.is_edp) check?
>
> Yes, this codepath seems generic.
>
>>
>>>
>>>> + ret = pm_runtime_resume_and_get(&dp->pdev->dev);
>>>> + if (ret) {
>>>> + DRM_ERROR("failed to pm_runtime_resume\n");
>>>> + return ret;
>>>> + }
>>>> + }
>>>> +
>>>> ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
>>>> if (ret) { /* link train failed */
>>>> dp->hpd_state = ST_DISCONNECTED;
>>>> @@ -658,6 +660,8 @@ static int dp_hpd_unplug_handle(struct
>>>> dp_display_private *dp, u32 data)
>>>> dp->dp_display.connector_type, state);
>>>> /* uevent will complete disconnection part */
>>>> + if (!dp->dp_display.is_edp)
>>>> + pm_runtime_put_sync(&dp->pdev->dev);
>>>> mutex_unlock(&dp->event_mutex);
>>>> return 0;
>>>> }
>>>> @@ -673,7 +677,7 @@ static int dp_irq_hpd_handle(struct
>>>> dp_display_private *dp, u32 data)
>>>> drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
>>>> dp->dp_display.connector_type, state);
>>>> - if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
>>>> + if (state == ST_DISPLAY_OFF) {
>>>> mutex_unlock(&dp->event_mutex);
>>>> return 0;
>>>> }
>>>> @@ -1086,7 +1090,6 @@ static int hpd_event_thread(void *data)
>>>> switch (todo->event_id) {
>>>> case EV_HPD_INIT_SETUP:
>>>> - dp_display_host_init(dp_priv);
>>>> break;
>>>> case EV_HPD_PLUG_INT:
>>>> dp_hpd_plug_handle(dp_priv, todo->data);
>>>> @@ -1264,6 +1267,10 @@ static int dp_display_probe(struct
>>>> platform_device *pdev)
>>>> platform_set_drvdata(pdev, &dp->dp_display);
>>>> + rc = devm_pm_runtime_enable(&pdev->dev);
>>>> + if (rc)
>>>> + goto err;
>>>> +
>>>> rc = dp_display_request_irq(dp);
>>>
>>> Here we have a problem now. The device can be runtime suspended,
>>> ceasing register access. However the IRQ enablement status is no
>>> longer synchronised to the DP's runtime status. Thus, if for some
>>> reason the IRQ handler is triggered, we can get unclocked register
>>> access / sync error.
>>>
>>> Please correct me if I'm wrong, but I think that the request_irq
>>> should also get the IRQF_NO_AUTOEN flag and the suspend / resume
>>> paths should also have enable_irq() / disable_irq() calls.
>>>
>> got it.
>>
>>
>>>> if (rc)
>>>> goto err;
>>>> @@ -1293,109 +1300,36 @@ static int dp_display_remove(struct
>>>> platform_device *pdev)
>>>> return 0;
>>>> }
>>>> -static int dp_pm_resume(struct device *dev)
>>>> +static int dp_pm_runtime_suspend(struct device *dev)
>>>> {
>>>> - struct platform_device *pdev = to_platform_device(dev);
>>>> - struct msm_dp *dp_display = platform_get_drvdata(pdev);
>>>> - struct dp_display_private *dp;
>>>> - int sink_count = 0;
>>>> -
>>>> - dp = container_of(dp_display, struct dp_display_private,
>>>> dp_display);
>>>> -
>>>> - mutex_lock(&dp->event_mutex);
>>>> -
>>>> - drm_dbg_dp(dp->drm_dev,
>>>> - "Before, type=%d core_inited=%d phy_inited=%d power_on=%d\n",
>>>> - dp->dp_display.connector_type, dp->core_initialized,
>>>> - dp->phy_initialized, dp_display->power_on);
>>>> -
>>>> - /* start from disconnected state */
>>>> - dp->hpd_state = ST_DISCONNECTED;
>>>> -
>>>> - /* turn on dp ctrl/phy */
>>>> - dp_display_host_init(dp);
>>>> -
>>>> - if (dp_display->is_edp)
>>>> - dp_catalog_ctrl_hpd_enable(dp->catalog);
>>>> -
>>>> - if (dp_catalog_link_is_connected(dp->catalog)) {
>>>> - /*
>>>> - * set sink to normal operation mode -- D0
>>>> - * before dpcd read
>>>> - */
>>>> - dp_display_host_phy_init(dp);
>>>> - dp_link_psm_config(dp->link, &dp->panel->link_info, false);
>>>> - sink_count = drm_dp_read_sink_count(dp->aux);
>>>> - if (sink_count < 0)
>>>> - sink_count = 0;
>>>> + struct dp_display_private *dp = dev_get_dp_display_private(dev);
>>>> + if (dp->dp_display.is_edp) {
>>>
>>> Why is it only for eDP case?
>>>
>>> My expectation is that if the DP device is suspended, then the PHY
>>> and the host parts are disabled. The driver, panel-edp / DP_AUX and
>>> the DRM framework should take care of resuming the DP device at the
>>> right time.
>>>
>> eDP and DP are implemented differently.
>>
>> for external DP case,
>>
>> 1) dp_pm_runtime_resume() only enable dp host.
>>
>> 2) at dp_bridge_hpd_enable(), enable hdp block only and have hpd irq
>> enabled and start waiting for plugin interrupt. but leave phy is not
>> initialized.
>>
>> 3) DP phy is initialized at plugin interrupt handle at the time right
>> before link training.
>>
>> for eDP case, hpd irq is always disable (no hpd irq required for eDP).
>>
>> 1) DP host, HDP block and phy are enabled (initialized) at same time
>> at dp_pm_runtime_resume()
>
> Ack. thanks. If you can add this to the comment somewhere in the file,
> that will be great. Also just for my understanding: The function
> dp_catalog_ctrl_hpd_enable() only enables handling of the HPD pin, it
> has no other side effects? So for the DP case if we have external HPD
> events, we don't need to call it, correct?
yes, this is correct. dp_catalog_ctrl_hpd_enable() and
dp_catalog_hpd_config_intr() are only for the case depend on hpd interrupts.
>
> Also, could you please add a followup patch that drop
> dp_display->internal_hpd and always uses the same codepath for both
> cases? Would that be a logical change after this series?
ok, i will submit a patch to remove hpd_internal.
>
>
>> dp_display_host_phy_exit(dp);
>>>> + dp_catalog_ctrl_hpd_disable(dp->catalog);
>>>> }
>>>> -
>>>> - dp->link->sink_count = sink_count;
>>>> - /*
>>>> - * can not declared display is connected unless
>>>> - * HDMI cable is plugged in and sink_count of
>>>> - * dongle become 1
>>>> - * also only signal audio when disconnected
>>>> - */
>>>> - if (dp->link->sink_count) {
>>>> - dp->dp_display.link_ready = true;
>>>> - } else {
>>>> - dp->dp_display.link_ready = false;
>>>> - dp_display_handle_plugged_change(dp_display, false);
>>>> - }
>>>> -
>>>> - drm_dbg_dp(dp->drm_dev,
>>>> - "After, type=%d sink=%d conn=%d core_init=%d phy_init=%d
>>>> power=%d\n",
>>>> - dp->dp_display.connector_type, dp->link->sink_count,
>>>> - dp->dp_display.link_ready, dp->core_initialized,
>>>> - dp->phy_initialized, dp_display->power_on);
>>>> -
>>>> - mutex_unlock(&dp->event_mutex);
>>>> + dp_display_host_deinit(dp);
>>>> return 0;
>>>> }
>>>> -static int dp_pm_suspend(struct device *dev)
>>>> +static int dp_pm_runtime_resume(struct device *dev)
>>>> {
>>>> - struct platform_device *pdev = to_platform_device(dev);
>>>> - struct msm_dp *dp_display = platform_get_drvdata(pdev);
>>>> - struct dp_display_private *dp;
>>>> -
>>>> - dp = container_of(dp_display, struct dp_display_private,
>>>> dp_display);
>>>> -
>>>> - mutex_lock(&dp->event_mutex);
>>>> -
>>>> - drm_dbg_dp(dp->drm_dev,
>>>> - "Before, type=%d core_inited=%d phy_inited=%d
>>>> power_on=%d\n",
>>>> - dp->dp_display.connector_type, dp->core_initialized,
>>>> - dp->phy_initialized, dp_display->power_on);
>>>> -
>>>> - /* mainlink enabled */
>>>> - if (dp_power_clk_status(dp->power, DP_CTRL_PM))
>>>> - dp_ctrl_off_link_stream(dp->ctrl);
>>>> -
>>>> - dp_display_host_phy_exit(dp);
>>>> -
>>>> - /* host_init will be called at pm_resume */
>>>> - dp_display_host_deinit(dp);
>>>> -
>>>> - dp->hpd_state = ST_SUSPENDED;
>>>> -
>>>> - drm_dbg_dp(dp->drm_dev,
>>>> - "After, type=%d core_inited=%d phy_inited=%d power_on=%d\n",
>>>> - dp->dp_display.connector_type, dp->core_initialized,
>>>> - dp->phy_initialized, dp_display->power_on);
>>>> + struct dp_display_private *dp = dev_get_dp_display_private(dev);
>>>> - mutex_unlock(&dp->event_mutex);
>>>> + dp_display_host_init(dp);
>>>> + if (dp->dp_display.is_edp) {
>>>
>>> Why?
>> Same as above comments.
>
> Ack
>
>>>
>>>> + dp_catalog_ctrl_hpd_enable(dp->catalog);
>>>> + dp_display_host_phy_init(dp);
>>>> + }
>>>> return 0;
>>>> }
>>>> static const struct dev_pm_ops dp_pm_ops = {
>>>> - .suspend = dp_pm_suspend,
>>>> - .resume = dp_pm_resume,
>>>> + SET_RUNTIME_PM_OPS(dp_pm_runtime_suspend,
>>>> dp_pm_runtime_resume, NULL)
>>>> + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
>>>> + pm_runtime_force_resume)
>>>> };
>>>> static struct platform_driver dp_display_driver = {
>>>> @@ -1478,10 +1412,6 @@ static int dp_display_get_next_bridge(struct
>>>> msm_dp *dp)
>>>> aux_bus = of_get_child_by_name(dev->of_node, "aux-bus");
>>>> if (aux_bus && dp->is_edp) {
>>>> - dp_display_host_init(dp_priv);
>>>> - dp_catalog_ctrl_hpd_enable(dp_priv->catalog);
>>>> - dp_display_host_phy_init(dp_priv);
>>>> -
>>>> /*
>>>> * The code below assumes that the panel will finish probing
>>>> * by the time devm_of_dp_aux_populate_ep_devices() returns.
>>>> @@ -1583,6 +1513,11 @@ void dp_bridge_atomic_enable(struct
>>>> drm_bridge *drm_bridge,
>>>> dp_hpd_plug_handle(dp_display, 0);
>>>> mutex_lock(&dp_display->event_mutex);
>>>> + if (pm_runtime_resume_and_get(&dp_display->pdev->dev)) {
>>>> + DRM_ERROR("failed to pm_runtime_resume\n");
>>>> + mutex_unlock(&dp_display->event_mutex);
>>>> + return;
>>>> + }
>>>> state = dp_display->hpd_state;
>>>> if (state != ST_DISPLAY_OFF && state != ST_MAINLINK_READY) {
>>>> @@ -1647,10 +1582,9 @@ void dp_bridge_atomic_post_disable(struct
>>>> drm_bridge *drm_bridge,
>>>> mutex_lock(&dp_display->event_mutex);
>>>> state = dp_display->hpd_state;
>>>> - if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED) {
>>>> - mutex_unlock(&dp_display->event_mutex);
>>>> - return;
>>>> - }
>>>> + if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED)
>>>> + drm_dbg_dp(dp->drm_dev, "type=%d wrong hpd_state=%d\n",
>>>> + dp->connector_type, state);
>>>> dp_display_disable(dp_display);
>>>> @@ -1663,6 +1597,8 @@ void dp_bridge_atomic_post_disable(struct
>>>> drm_bridge *drm_bridge,
>>>> }
>>>> drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
>>>> +
>>>> + pm_runtime_put_sync(&dp_display->pdev->dev);
>>>> mutex_unlock(&dp_display->event_mutex);
>>>> }
>>>> @@ -1702,6 +1638,12 @@ void dp_bridge_hpd_enable(struct
>>>> drm_bridge *bridge)
>>>> struct dp_display_private *dp = container_of(dp_display,
>>>> struct dp_display_private, dp_display);
>>>> mutex_lock(&dp->event_mutex);
>>>> + if (pm_runtime_resume_and_get(&dp->pdev->dev)) {
>>>> + DRM_ERROR("failed to start power\n");
>>>> + mutex_unlock(&dp->event_mutex);
>>>> + return;
>>>> + }
>>>> +
>>>> dp_catalog_ctrl_hpd_enable(dp->catalog);
>>>> /* enable HDP interrupts */
>>>> @@ -1723,6 +1665,9 @@ void dp_bridge_hpd_disable(struct drm_bridge
>>>> *bridge)
>>>> dp_catalog_ctrl_hpd_disable(dp->catalog);
>>>> dp_display->internal_hpd = false;
>>>> + dp->hpd_state = ST_DISCONNECTED;
>>>
>>> As I wrote in the comment to the previous series, this is incorrect.
>>> The .hpd_disable() doesn't mean that the display gets disconnected.
>>> Neither does .hpd_enable().
>> ok,
>>>
>>>> +
>>>> + pm_runtime_put_sync(&dp->pdev->dev);
>>>> mutex_unlock(&dp->event_mutex);
>>>> }
>>>> @@ -1737,13 +1682,10 @@ void dp_bridge_hpd_notify(struct
>>>> drm_bridge *bridge,
>>>> if (dp_display->internal_hpd)
>>>> return;
>>>> - if (!dp->core_initialized) {
>>>> - drm_dbg_dp(dp->drm_dev, "not initialized\n");
>>>> - return;
>>>> - }
>>>> -
>>>> - if (!dp_display->link_ready && status ==
>>>> connector_status_connected)
>>>> + if (!dp_display->link_ready && status ==
>>>> connector_status_connected) {
>>>> + dp->hpd_state = ST_DISCONNECTED;
>>>> dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
>>>> - else if (dp_display->link_ready && status ==
>>>> connector_status_disconnected)
>>>> + } else if (dp_display->link_ready && status ==
>>>> connector_status_disconnected) {
>>>> dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
>>>> + }
>>>> }
>>>> diff --git a/drivers/gpu/drm/msm/dp/dp_power.c
>>>> b/drivers/gpu/drm/msm/dp/dp_power.c
>>>> index 5cb84ca..863c766 100644
>>>> --- a/drivers/gpu/drm/msm/dp/dp_power.c
>>>> +++ b/drivers/gpu/drm/msm/dp/dp_power.c
>>>> @@ -152,20 +152,9 @@ int dp_power_client_init(struct dp_power
>>>> *dp_power)
>>>> power = container_of(dp_power, struct dp_power_private,
>>>> dp_power);
>>>> - pm_runtime_enable(power->dev);
>>>> -
>>>> return dp_power_clk_init(power);
>>>> }
>>>> -void dp_power_client_deinit(struct dp_power *dp_power)
>>>> -{
>>>> - struct dp_power_private *power;
>>>> -
>>>> - power = container_of(dp_power, struct dp_power_private,
>>>> dp_power);
>>>> -
>>>> - pm_runtime_disable(power->dev);
>>>> -}
>>>> -
>>>> int dp_power_init(struct dp_power *dp_power)
>>>> {
>>>> int rc = 0;
>>>> @@ -173,11 +162,7 @@ int dp_power_init(struct dp_power *dp_power)
>>>> power = container_of(dp_power, struct dp_power_private,
>>>> dp_power);
>>>> - pm_runtime_get_sync(power->dev);
>>>> -
>>>> rc = dp_power_clk_enable(dp_power, DP_CORE_PM, true);
>>>> - if (rc)
>>>> - pm_runtime_put_sync(power->dev);
>>>> return rc;
>>>> }
>>>> @@ -189,7 +174,6 @@ int dp_power_deinit(struct dp_power *dp_power)
>>>> power = container_of(dp_power, struct dp_power_private,
>>>> dp_power);
>>>> dp_power_clk_enable(dp_power, DP_CORE_PM, false);
>>>> - pm_runtime_put_sync(power->dev);
>>>> return 0;
>>>> }
>>>> diff --git a/drivers/gpu/drm/msm/dp/dp_power.h
>>>> b/drivers/gpu/drm/msm/dp/dp_power.h
>>>> index a3dec20..55ada51 100644
>>>> --- a/drivers/gpu/drm/msm/dp/dp_power.h
>>>> +++ b/drivers/gpu/drm/msm/dp/dp_power.h
>>>> @@ -81,17 +81,6 @@ int dp_power_clk_enable(struct dp_power *power,
>>>> enum dp_pm_type pm_type,
>>>> int dp_power_client_init(struct dp_power *power);
>>>> /**
>>>> - * dp_power_clinet_deinit() - de-initialize clock and regulator
>>>> modules
>>>> - *
>>>> - * @power: instance of power module
>>>> - * return: 0 for success, error for failure.
>>>> - *
>>>> - * This API will de-initialize the DisplayPort's clocks and regulator
>>>> - * modules.
>>>> - */
>>>> -void dp_power_client_deinit(struct dp_power *power);
>>>> -
>>>> -/**
>>>> * dp_power_get() - configure and get the DisplayPort power
>>>> module data
>>>> *
>>>> * @parser: instance of parser module
>>>
>
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