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Date: Thu, 23 Feb 2023 19:26:35 +0530
From: Sankeerth Billakanti <quic_sbillaka@...cinc.com>
To: <dri-devel@...ts.freedesktop.org>, <linux-arm-msm@...r.kernel.org>,
<freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
CC: Sankeerth Billakanti <quic_sbillaka@...cinc.com>,
<robdclark@...il.com>, <seanpaul@...omium.org>,
<swboyd@...omium.org>, <quic_kalyant@...cinc.com>,
<quic_abhinavk@...cinc.com>, <dianders@...omium.org>,
<quic_khsieh@...cinc.com>, <quic_bjorande@...cinc.com>,
<sean@...rly.run>, <airlied@...ux.ie>, <daniel@...ll.ch>,
<dmitry.baryshkov@...aro.org>, <quic_vproddut@...cinc.com>
Subject: [RFC PATCH 2/2] drm/msm/dp: enable pm_runtime support for dp driver
The current DP driver directly enables or disables the necessary control
resources based on code flow. This could disable a required resource that
is needed in a different usecase. It can also lead to excessive voting of
a resource and may increase power consumption.
The pm_runtime framework can solve this problem in DP driver by monitoring
the resource enable disable calls. This change will enable support for the
pm_runtime resume and suspend operations for DP driver.
Signed-off-by: Sankeerth Billakanti <quic_sbillaka@...cinc.com>
---
drivers/gpu/drm/msm/dp/dp_aux.c | 6 ++
drivers/gpu/drm/msm/dp/dp_display.c | 121 ++++++++++++++++------------
drivers/gpu/drm/msm/dp/dp_power.c | 7 --
3 files changed, 76 insertions(+), 58 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_aux.c b/drivers/gpu/drm/msm/dp/dp_aux.c
index 5da95dfdeede..45026827bf7a 100644
--- a/drivers/gpu/drm/msm/dp/dp_aux.c
+++ b/drivers/gpu/drm/msm/dp/dp_aux.c
@@ -338,6 +338,7 @@ static ssize_t dp_aux_transfer_init(struct drm_dp_aux *dp_aux,
return -EINVAL;
}
+ pm_runtime_get_sync(dp_aux->dev);
mutex_lock(&aux->mutex);
if (!aux->initted) {
ret = -EIO;
@@ -418,6 +419,8 @@ static ssize_t dp_aux_transfer_init(struct drm_dp_aux *dp_aux,
exit:
mutex_unlock(&aux->mutex);
+ pm_runtime_mark_last_busy(dp_aux->dev);
+ pm_runtime_put_autosuspend(dp_aux->dev);
return ret;
}
@@ -454,6 +457,7 @@ static ssize_t dp_aux_transfer(struct drm_dp_aux *dp_aux,
return -EINVAL;
}
+ pm_runtime_get_sync(dp_aux->dev);
mutex_lock(&aux->mutex);
if (!aux->initted) {
ret = -EIO;
@@ -527,6 +531,8 @@ static ssize_t dp_aux_transfer(struct drm_dp_aux *dp_aux,
exit:
mutex_unlock(&aux->mutex);
+ pm_runtime_mark_last_busy(dp_aux->dev);
+ pm_runtime_put_autosuspend(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 a5dcef040b74..a23e79e43100 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -307,8 +307,10 @@ static void dp_display_unbind(struct device *dev, struct device *master,
struct msm_drm_private *priv = dev_get_drvdata(master);
/* disable all HPD interrupts */
- if (dp->core_initialized)
+ if (dp->core_initialized) {
dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
+ pm_runtime_put_sync(dev);
+ }
kthread_stop(dp->ev_tsk);
@@ -1083,26 +1085,6 @@ void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
mutex_unlock(&dp_display->event_mutex);
}
-static void dp_display_config_hpd(struct dp_display_private *dp)
-{
-
- dp_display_host_init(dp);
- dp_catalog_ctrl_hpd_config(dp->catalog);
-
- /* Enable plug and unplug interrupts only if requested */
- if (dp->dp_display.internal_hpd)
- dp_catalog_hpd_config_intr(dp->catalog,
- DP_DP_HPD_PLUG_INT_MASK |
- DP_DP_HPD_UNPLUG_INT_MASK,
- true);
-
- /* Enable interrupt first time
- * we are leaving dp clocks on during disconnect
- * and never disable interrupt
- */
- enable_irq(dp->irq);
-}
-
static int hpd_event_thread(void *data)
{
struct dp_display_private *dp_priv;
@@ -1163,9 +1145,6 @@ static int hpd_event_thread(void *data)
spin_unlock_irqrestore(&dp_priv->event_lock, flag);
switch (todo->event_id) {
- case EV_HPD_INIT_SETUP:
- dp_display_config_hpd(dp_priv);
- break;
case EV_HPD_PLUG_INT:
dp_hpd_plug_handle(dp_priv, todo->data);
break;
@@ -1337,16 +1316,12 @@ static int dp_display_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, &dp->dp_display);
- if (dp->dp_display.is_edp) {
- dp_display_host_init(dp);
- dp_display_host_phy_init(dp);
- dp_catalog_ctrl_hpd_config(dp->catalog);
+ pm_runtime_enable(&pdev->dev);
+ pm_runtime_set_autosuspend_delay(&pdev->dev, 1000);
+ pm_runtime_use_autosuspend(&pdev->dev);
+ if (dp->dp_display.is_edp) {
rc = devm_of_dp_aux_populate_bus(dp->aux, NULL);
-
- dp_display_host_phy_exit(dp);
- dp_display_host_deinit(dp);
-
if (rc) {
DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
goto error;
@@ -1367,6 +1342,8 @@ static int dp_display_remove(struct platform_device *pdev)
{
struct dp_display_private *dp = dev_get_dp_display_private(&pdev->dev);
+ pm_runtime_dont_use_autosuspend(&pdev->dev);
+ pm_runtime_disable(&pdev->dev);
dp_display_deinit_sub_modules(dp);
component_del(&pdev->dev, &dp_display_comp_ops);
@@ -1375,6 +1352,42 @@ static int dp_display_remove(struct platform_device *pdev)
return 0;
}
+static int dp_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;
+
+ dp = container_of(dp_display, struct dp_display_private, dp_display);
+ dp_display_host_phy_exit(dp);
+ dp_display_host_deinit(dp);
+
+ return 0;
+}
+
+static int dp_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);
+ dp_display_host_init(dp);
+
+ if (dp->dp_display.is_edp) {
+ dp_display_host_phy_init(dp);
+ } else {
+ dp_catalog_hpd_config_intr(dp->catalog,
+ DP_DP_HPD_PLUG_INT_MASK |
+ DP_DP_HPD_UNPLUG_INT_MASK,
+ true);
+ }
+
+ dp_catalog_ctrl_hpd_config(dp->catalog);
+
+ return 0;
+}
+
static int dp_pm_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
@@ -1384,6 +1397,9 @@ static int dp_pm_resume(struct device *dev)
dp = container_of(dp_display, struct dp_display_private, dp_display);
+ if (pm_runtime_suspended(dev))
+ return 0;
+
mutex_lock(&dp->event_mutex);
drm_dbg_dp(dp->drm_dev,
@@ -1394,16 +1410,7 @@ static int dp_pm_resume(struct device *dev)
/* start from disconnected state */
dp->hpd_state = ST_DISCONNECTED;
- /* turn on dp ctrl/phy */
- dp_display_host_init(dp);
-
- dp_catalog_ctrl_hpd_config(dp->catalog);
-
- if (dp->dp_display.internal_hpd)
- dp_catalog_hpd_config_intr(dp->catalog,
- DP_DP_HPD_PLUG_INT_MASK |
- DP_DP_HPD_UNPLUG_INT_MASK,
- true);
+ dp_runtime_resume(dev);
if (dp_catalog_link_is_connected(dp->catalog)) {
/*
@@ -1452,27 +1459,29 @@ static int dp_pm_suspend(struct device *dev)
dp = container_of(dp_display, struct dp_display_private, dp_display);
+ if (pm_runtime_suspended(dev))
+ return 0;
+
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,
+ "Before, type=%d sink=%d conn=%d core_inited=%d phy_inited=%d power_on=%d\n",
+ dp->dp_display.connector_type, dp->link->sink_count,
+ dp->dp_display.is_connected, 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_runtime_suspend(dev);
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,
+ "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.is_connected, dp->core_initialized,
dp->phy_initialized, dp_display->power_on);
mutex_unlock(&dp->event_mutex);
@@ -1481,6 +1490,11 @@ static int dp_pm_suspend(struct device *dev)
}
static const struct dev_pm_ops dp_pm_ops = {
+
+ SET_RUNTIME_PM_OPS(dp_runtime_suspend, dp_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+
.suspend = dp_pm_suspend,
.resume = dp_pm_resume,
};
@@ -1521,8 +1535,11 @@ void msm_dp_irq_postinstall(struct msm_dp *dp_display)
dp = container_of(dp_display, struct dp_display_private, dp_display);
+ /* enable host_init for HPD intr for DP */
if (!dp_display->is_edp)
- dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 0);
+ pm_runtime_get_sync(&dp->pdev->dev);
+
+ enable_irq(dp->irq);
}
bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
@@ -1645,6 +1662,7 @@ void dp_bridge_enable(struct drm_bridge *drm_bridge)
return;
}
+ pm_runtime_get_sync(&dp_display->pdev->dev);
if (dp->is_edp)
dp_hpd_plug_handle(dp_display, 0);
@@ -1728,6 +1746,7 @@ void dp_bridge_post_disable(struct drm_bridge *drm_bridge)
drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
mutex_unlock(&dp_display->event_mutex);
+ pm_runtime_put_sync(&dp_display->pdev->dev);
}
void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
diff --git a/drivers/gpu/drm/msm/dp/dp_power.c b/drivers/gpu/drm/msm/dp/dp_power.c
index c0aaabb03389..a736d1b0f02f 100644
--- a/drivers/gpu/drm/msm/dp/dp_power.c
+++ b/drivers/gpu/drm/msm/dp/dp_power.c
@@ -172,8 +172,6 @@ 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->pdev->dev);
-
rc = dp_power_clk_init(power);
if (rc)
DRM_ERROR("failed to init clocks %d\n", rc);
@@ -192,7 +190,6 @@ void dp_power_client_deinit(struct dp_power *dp_power)
power = container_of(dp_power, struct dp_power_private, dp_power);
- pm_runtime_disable(&power->pdev->dev);
}
int dp_power_init(struct dp_power *dp_power, bool flip)
@@ -207,8 +204,6 @@ int dp_power_init(struct dp_power *dp_power, bool flip)
power = container_of(dp_power, struct dp_power_private, dp_power);
- pm_runtime_get_sync(&power->pdev->dev);
-
rc = dp_power_clk_enable(dp_power, DP_CORE_PM, true);
if (rc) {
DRM_ERROR("failed to enable DP core clocks, %d\n", rc);
@@ -218,7 +213,6 @@ int dp_power_init(struct dp_power *dp_power, bool flip)
return 0;
exit:
- pm_runtime_put_sync(&power->pdev->dev);
return rc;
}
@@ -229,7 +223,6 @@ 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->pdev->dev);
return 0;
}
--
2.39.0
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