From cd79272696ef21fb03d8b140c4530ac6b049e417 Mon Sep 17 00:00:00 2001 From: Archit Taneja Date: Wed, 15 Jun 2016 18:04:31 +0530 Subject: [PATCH] drm/msm: Call pm_runtime_enable/disable for newly created devices With the new device hierarchy for MDP5, we need to enable runtime PM for both the toplevel MDSS device and the MDP5 device itself. Enable runtime PM for the new devices. Since MDP4 and MDP5 now have different places where runtime PM is enabled, remove the previous pm_runtime_enable/disable calls, and squash them in the respective kms drivers. The new device hierarchy (as expressed in the DT bindings) has the GDSC tied only to the MDSS wrapper device. This GDSC needs to be enabled for accessing any register in the MDSS sub-blocks. Once every driver is runtime adapted, the GDSC will be enabled when any sub-block device calls runtime_get because of the parent-child relationship with MDSS. Until then, we call pm_runtime_get_sync() once for the MDSS device to ensure the GDSC is never disabled. This will be removed once all the drivers are runtime PM adapted. The error handling paths become a bit tricky when we call these runtime PM funcs. There doesn't seem to be any helper that checks if runtime PM is enabled already. Add bool variables in mdp4_kms/mdp5_kms structs to check if the driver had managed to call pm_runtime_enable before bailing out. Signed-off-by: Archit Taneja Signed-off-by: Rob Clark --- drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c | 8 ++++++++ drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h | 2 ++ drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c | 6 ++++++ drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h | 2 ++ drivers/gpu/drm/msm/mdp/mdp5/mdp5_mdss.c | 12 ++++++++++++ drivers/gpu/drm/msm/msm_drv.c | 5 +---- 6 files changed, 31 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c index b6920917c4a9..ba8df15605d7 100644 --- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c +++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c @@ -158,6 +158,7 @@ static const char * const iommu_ports[] = { static void mdp4_destroy(struct msm_kms *kms) { struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); + struct device *dev = mdp4_kms->dev->dev; struct msm_mmu *mmu = mdp4_kms->mmu; if (mmu) { @@ -169,6 +170,10 @@ static void mdp4_destroy(struct msm_kms *kms) msm_gem_put_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id); if (mdp4_kms->blank_cursor_bo) drm_gem_object_unreference_unlocked(mdp4_kms->blank_cursor_bo); + + if (mdp4_kms->rpm_enabled) + pm_runtime_disable(dev); + kfree(mdp4_kms); } @@ -511,6 +516,9 @@ struct msm_kms *mdp4_kms_init(struct drm_device *dev) clk_set_rate(mdp4_kms->clk, config->max_clk); clk_set_rate(mdp4_kms->lut_clk, config->max_clk); + pm_runtime_enable(dev->dev); + mdp4_kms->rpm_enabled = true; + /* make sure things are off before attaching iommu (bootloader could * have left things on, in which case we'll start getting faults if * we don't disable): diff --git a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h index c5d045d5680d..25fb83997119 100644 --- a/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h +++ b/drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.h @@ -47,6 +47,8 @@ struct mdp4_kms { struct mdp_irq error_handler; + bool rpm_enabled; + /* empty/blank cursor bo to use when cursor is "disabled" */ struct drm_gem_object *blank_cursor_bo; uint32_t blank_cursor_iova; diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c index a0b974772cf6..5d6d9e146aaa 100644 --- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c +++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.c @@ -668,6 +668,9 @@ static void mdp5_destroy(struct platform_device *pdev) mdp5_smp_destroy(mdp5_kms->smp); if (mdp5_kms->cfg) mdp5_cfg_destroy(mdp5_kms->cfg); + + if (mdp5_kms->rpm_enabled) + pm_runtime_disable(&pdev->dev); } static int mdp5_init(struct platform_device *pdev, struct drm_device *dev) @@ -720,6 +723,9 @@ static int mdp5_init(struct platform_device *pdev, struct drm_device *dev) */ clk_set_rate(mdp5_kms->core_clk, 200000000); + pm_runtime_enable(&pdev->dev); + mdp5_kms->rpm_enabled = true; + read_mdp_hw_revision(mdp5_kms, &major, &minor); mdp5_kms->cfg = mdp5_cfg_init(mdp5_kms, major, minor); diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h index d214d50bbd46..03738927be10 100644 --- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h +++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_kms.h @@ -59,6 +59,8 @@ struct mdp5_kms { */ spinlock_t resource_lock; + bool rpm_enabled; + struct mdp_irq error_handler; }; #define to_mdp5_kms(x) container_of(x, struct mdp5_kms, base) diff --git a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_mdss.c b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_mdss.c index 871c4424a820..d444a6901fff 100644 --- a/drivers/gpu/drm/msm/mdp/mdp5/mdp5_mdss.c +++ b/drivers/gpu/drm/msm/mdp/mdp5/mdp5_mdss.c @@ -152,6 +152,10 @@ void msm_mdss_destroy(struct drm_device *dev) mdss->irqcontroller.domain = NULL; regulator_disable(mdss->vdd); + + pm_runtime_put_sync(dev->dev); + + pm_runtime_disable(dev->dev); } int msm_mdss_init(struct drm_device *dev) @@ -215,6 +219,14 @@ int msm_mdss_init(struct drm_device *dev) priv->mdss = mdss; + pm_runtime_enable(dev->dev); + + /* + * TODO: This is needed as the MDSS GDSC is only tied to MDSS's power + * domain. Remove this once runtime PM is adapted for all the devices. + */ + pm_runtime_get_sync(dev->dev); + return 0; fail_irq: regulator_disable(mdss->vdd); diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c index d650aaca60f8..1c1869011092 100644 --- a/drivers/gpu/drm/msm/msm_drv.c +++ b/drivers/gpu/drm/msm/msm_drv.c @@ -215,10 +215,8 @@ static int msm_drm_uninit(struct device *dev) flush_workqueue(priv->atomic_wq); destroy_workqueue(priv->atomic_wq); - if (kms) { - pm_runtime_disable(dev); + if (kms) kms->funcs->destroy(kms); - } if (gpu) { mutex_lock(&ddev->struct_mutex); @@ -410,7 +408,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv) } if (kms) { - pm_runtime_enable(dev); ret = kms->funcs->hw_init(kms); if (ret) { dev_err(dev, "kms hw init failed: %d\n", ret); -- 2.20.1