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Fri, 01 Dec 2023 15:20:48 -0800 (PST) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1784123597566438691 X-GMAIL-MSGID: 1784123597566438691 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 v9: -- silent compiler warning message at dp_power_init() and dp_power_deinit() with W1 flag Changes in v7: -- add comments to dp_pm_runtime_resume() -- add comments to dp_bridge_hpd_enable() -- delete dp->hpd_state = ST_DISCONNECTED from dp_bridge_hpd_notify() Changes in v6: -- delete dp_power_client_deinit(dp->power); -- remove if (!dp->dp_display.is_edp) condition checkout at plug_handle() -- remove if (!dp->dp_display.is_edp) condition checkout at unplug_handle() -- add IRQF_NO_AUTOEN to devm_request_irq() -- add enable_irq() and disable_irq() to pm_runtime_resume()/suspend() -- del dp->hpd_state = ST_DISCONNECTED from dp_bridge_hpd_disable() Changes in v5: -- remove pm_runtime_put_autosuspend feature, use pm_runtime_put_sync() -- squash add pm_runtime_force_suspend()/resume() patch into this patch 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 Reviewed-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/dp/dp_aux.c | 5 + drivers/gpu/drm/msm/dp/dp_display.c | 181 ++++++++++++++---------------------- drivers/gpu/drm/msm/dp/dp_power.c | 32 +------ drivers/gpu/drm/msm/dp/dp_power.h | 11 --- 4 files changed, 77 insertions(+), 152 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 a99a786..9520d83 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 { @@ -309,10 +308,6 @@ 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); @@ -542,6 +537,7 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) { u32 state; int ret; + struct platform_device *pdev = dp->dp_display.pdev; mutex_lock(&dp->event_mutex); @@ -549,7 +545,7 @@ 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; } @@ -566,7 +562,13 @@ static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data) return 0; } - ret = dp_display_usbpd_configure_cb(&dp->dp_display.pdev->dev); + ret = pm_runtime_resume_and_get(&pdev->dev); + if (ret) { + DRM_ERROR("failed to pm_runtime_resume\n"); + return ret; + } + + ret = dp_display_usbpd_configure_cb(&pdev->dev); if (ret) { /* link train failed */ dp->hpd_state = ST_DISCONNECTED; } else { @@ -598,6 +600,7 @@ static void dp_display_handle_plugged_change(struct msm_dp *dp_display, static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) { u32 state; + struct platform_device *pdev = dp->dp_display.pdev; mutex_lock(&dp->event_mutex); @@ -648,6 +651,7 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data) dp->dp_display.connector_type, state); /* uevent will complete disconnection part */ + pm_runtime_put_sync(&pdev->dev); mutex_unlock(&dp->event_mutex); return 0; } @@ -663,7 +667,7 @@ 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; } @@ -1076,7 +1080,6 @@ 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); @@ -1168,7 +1171,9 @@ static int dp_display_request_irq(struct dp_display_private *dp) } rc = devm_request_irq(&pdev->dev, dp->irq, dp_display_irq_handler, - IRQF_TRIGGER_HIGH, "dp_display_isr", dp); + IRQF_TRIGGER_HIGH|IRQF_NO_AUTOEN, + "dp_display_isr", dp); + if (rc < 0) { DRM_ERROR("failed to request IRQ%u: %d\n", dp->irq, rc); @@ -1254,6 +1259,10 @@ 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); if (rc) goto err; @@ -1276,115 +1285,52 @@ static void dp_display_remove(struct platform_device *pdev) struct dp_display_private *dp = dev_get_dp_display_private(&pdev->dev); component_del(&pdev->dev, &dp_display_comp_ops); - dp_power_client_deinit(dp->power); dp_display_deinit_sub_modules(dp); platform_set_drvdata(pdev, NULL); } -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); + struct dp_display_private *dp = dev_get_dp_display_private(dev); - 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; + disable_irq(dp->irq); + if (dp->dp_display.is_edp) { 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); + /* + * for eDP, host cotroller, HPD block and PHY are enabled here + * but with HPD irq disabled + * + * for DP, only host controller is enabled here. + * HPD block is enabled at dp_bridge_hpd_enable() + * PHY will be enabled at plugin handler later + */ + dp_display_host_init(dp); + if (dp->dp_display.is_edp) { + dp_catalog_ctrl_hpd_enable(dp->catalog); + dp_display_host_phy_init(dp); + } + enable_irq(dp->irq); 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 = { @@ -1467,10 +1413,6 @@ 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. @@ -1567,6 +1509,11 @@ 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->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) { @@ -1631,10 +1578,9 @@ 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); @@ -1647,6 +1593,8 @@ 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->pdev->dev); mutex_unlock(&dp_display->event_mutex); } @@ -1685,7 +1633,21 @@ void dp_bridge_hpd_enable(struct drm_bridge *bridge) struct msm_dp *dp_display = dp_bridge->dp_display; struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display); + /* + * this is for external DP with hpd irq enabled case, + * step-1: dp_pm_runtime_resume() enable dp host only + * step-2: enable hdp block and have hpd irq enabled here + * step-3: waiting for plugin irq while phy is not initialized + * step-4: DP PHY is initialized at plugin handler before link training + * + */ mutex_lock(&dp->event_mutex); + if (pm_runtime_resume_and_get(&dp_display->pdev->dev)) { + DRM_ERROR("failed to resume power\n"); + mutex_unlock(&dp->event_mutex); + return; + } + dp_catalog_ctrl_hpd_enable(dp->catalog); /* enable HDP interrupts */ @@ -1707,6 +1669,8 @@ void dp_bridge_hpd_disable(struct drm_bridge *bridge) dp_catalog_ctrl_hpd_disable(dp->catalog); dp_display->internal_hpd = false; + + pm_runtime_put_sync(&dp_display->pdev->dev); mutex_unlock(&dp->event_mutex); } @@ -1721,11 +1685,6 @@ 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) dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0); else if (dp_display->link_ready && status == connector_status_disconnected) diff --git a/drivers/gpu/drm/msm/dp/dp_power.c b/drivers/gpu/drm/msm/dp/dp_power.c index 5cb84ca..c4843dd 100644 --- a/drivers/gpu/drm/msm/dp/dp_power.c +++ b/drivers/gpu/drm/msm/dp/dp_power.c @@ -152,45 +152,17 @@ 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; - struct dp_power_private *power = NULL; - - 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; + return dp_power_clk_enable(dp_power, DP_CORE_PM, true); } 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); - pm_runtime_put_sync(power->dev); - return 0; + return dp_power_clk_enable(dp_power, DP_CORE_PM, false); } struct dp_power *dp_power_get(struct device *dev, struct dp_parser *parser) 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