Re: [DPU PATCH 10/11] drm/msm/dpu: use runtime_pm calls in dpu_dbg

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On Thu, May 10, 2018 at 01:59:44PM +0530, Rajesh Yadav wrote:
> Currently, msm_drv was creating dpu_power_handle client
> which was used by dpu_dbg module to enable power resources
> before register debug dumping.
> 
> Now since, the mdss core power resource handling is
> implemented via runtime_pm and same has been removed
> from dpu_power_handle. Remove dpu_power_handle dependency
> from msm_drv and use pm_runtime_get/put_sync calls from
> dpu_dbg module on dpu_mdss top level device for core,
> ahb clock and power resource management (for register access).
> 
> Signed-off-by: Rajesh Yadav <ryadav@xxxxxxxxxxxxxx>

Reviewed-by: Sean Paul <seanpaul@xxxxxxxxxxxx>

> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c |  4 +---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h |  4 ----
>  drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c       |  3 +--
>  drivers/gpu/drm/msm/dpu_dbg.c                 | 18 +++++++-----------
>  drivers/gpu/drm/msm/dpu_dbg.h                 | 13 ++-----------
>  drivers/gpu/drm/msm/msm_drv.c                 | 27 +--------------------------
>  drivers/gpu/drm/msm/msm_drv.h                 |  1 -
>  7 files changed, 12 insertions(+), 58 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
> index d1364fa..e2e7c06 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.c
> @@ -676,10 +676,9 @@ int dpu_core_perf_init(struct dpu_core_perf *perf,
>  		struct drm_device *dev,
>  		struct dpu_mdss_cfg *catalog,
>  		struct dpu_power_handle *phandle,
> -		struct dpu_power_client *pclient,
>  		struct dss_clk *core_clk)
>  {
> -	if (!perf || !dev || !catalog || !phandle || !pclient || !core_clk) {
> +	if (!perf || !dev || !catalog || !phandle || !core_clk) {
>  		DPU_ERROR("invalid parameters\n");
>  		return -EINVAL;
>  	}
> @@ -687,7 +686,6 @@ int dpu_core_perf_init(struct dpu_core_perf *perf,
>  	perf->dev = dev;
>  	perf->catalog = catalog;
>  	perf->phandle = phandle;
> -	perf->pclient = pclient;
>  	perf->core_clk = core_clk;
>  
>  	perf->max_core_clk_rate = core_clk->max_rate;
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h
> index 9c1a719..cde48df 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_core_perf.h
> @@ -53,7 +53,6 @@ struct dpu_core_perf_tune {
>   * @debugfs_root: top level debug folder
>   * @catalog: Pointer to catalog configuration
>   * @phandle: Pointer to power handler
> - * @pclient: Pointer to power client
>   * @core_clk: Pointer to core clock structure
>   * @core_clk_rate: current core clock rate
>   * @max_core_clk_rate: maximum allowable core clock rate
> @@ -68,7 +67,6 @@ struct dpu_core_perf {
>  	struct dentry *debugfs_root;
>  	struct dpu_mdss_cfg *catalog;
>  	struct dpu_power_handle *phandle;
> -	struct dpu_power_client *pclient;
>  	struct dss_clk *core_clk;
>  	u64 core_clk_rate;
>  	u64 max_core_clk_rate;
> @@ -115,14 +113,12 @@ void dpu_core_perf_crtc_update(struct drm_crtc *crtc,
>   * @dev: Pointer to drm device
>   * @catalog: Pointer to catalog
>   * @phandle: Pointer to power handle
> - * @pclient: Pointer to power client
>   * @core_clk: pointer to core clock
>   */
>  int dpu_core_perf_init(struct dpu_core_perf *perf,
>  		struct drm_device *dev,
>  		struct dpu_mdss_cfg *catalog,
>  		struct dpu_power_handle *phandle,
> -		struct dpu_power_client *pclient,
>  		struct dss_clk *core_clk);
>  
>  /**
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> index f6511c9..67bef32 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
> @@ -1728,8 +1728,7 @@ static int dpu_kms_hw_init(struct msm_kms *kms)
>  #endif
>  
>  	rc = dpu_core_perf_init(&dpu_kms->perf, dev, dpu_kms->catalog,
> -			&priv->phandle, priv->pclient,
> -			_dpu_kms_get_clk(dpu_kms, "core_clk"));
> +			&priv->phandle, _dpu_kms_get_clk(dpu_kms, "core_clk"));
>  	if (rc) {
>  		DPU_ERROR("failed to init perf %d\n", rc);
>  		goto perf_err;
> diff --git a/drivers/gpu/drm/msm/dpu_dbg.c b/drivers/gpu/drm/msm/dpu_dbg.c
> index 4a39b82..27538bc 100644
> --- a/drivers/gpu/drm/msm/dpu_dbg.c
> +++ b/drivers/gpu/drm/msm/dpu_dbg.c
> @@ -20,6 +20,7 @@
>  #include <linux/dma-buf.h>
>  #include <linux/slab.h>
>  #include <linux/list_sort.h>
> +#include <linux/pm_runtime.h>
>  
>  #include "dpu_dbg.h"
>  #include "disp/dpu1/dpu_hw_catalog.h"
> @@ -167,7 +168,6 @@ struct dpu_dbg_vbif_debug_bus {
>   * @evtlog: event log instance
>   * @reg_base_list: list of register dumping regions
>   * @dev: device pointer
> - * @power_ctrl: callback structure for enabling power for reading hw registers
>   * @req_dump_blks: list of blocks requested for dumping
>   * @panic_on_err: whether to kernel panic after triggering dump via debugfs
>   * @dump_work: work struct for deferring register dump work to separate thread
> @@ -182,7 +182,6 @@ struct dpu_dbg_vbif_debug_bus {
>  	struct dpu_dbg_evtlog *evtlog;
>  	struct list_head reg_base_list;
>  	struct device *dev;
> -	struct dpu_dbg_power_ctrl power_ctrl;
>  
>  	struct dpu_dbg_reg_base *req_dump_blks[DPU_DBG_BASE_MAX];
>  
> @@ -2008,12 +2007,10 @@ static void _dpu_debug_bus_ppb1_dump(void __iomem *mem_base,
>   */
>  static inline void _dpu_dbg_enable_power(int enable)
>  {
> -	if (!dpu_dbg_base.power_ctrl.enable_fn)
> -		return;
> -	dpu_dbg_base.power_ctrl.enable_fn(
> -			dpu_dbg_base.power_ctrl.handle,
> -			dpu_dbg_base.power_ctrl.client,
> -			enable);
> +	if (enable)
> +		pm_runtime_get_sync(dpu_dbg_base.dev);
> +	else
> +		pm_runtime_put_sync(dpu_dbg_base.dev);
>  }
>  
>  /**
> @@ -3099,16 +3096,15 @@ void dpu_dbg_init_dbg_buses(u32 hwversion)
>  	}
>  }
>  
> -int dpu_dbg_init(struct device *dev, struct dpu_dbg_power_ctrl *power_ctrl)
> +int dpu_dbg_init(struct device *dev)
>  {
> -	if (!dev || !power_ctrl) {
> +	if (!dev) {
>  		pr_err("invalid params\n");
>  		return -EINVAL;
>  	}
>  
>  	INIT_LIST_HEAD(&dpu_dbg_base.reg_base_list);
>  	dpu_dbg_base.dev = dev;
> -	dpu_dbg_base.power_ctrl = *power_ctrl;
>  
>  	dpu_dbg_base.evtlog = dpu_evtlog_init();
>  	if (IS_ERR_OR_NULL(dpu_dbg_base.evtlog))
> diff --git a/drivers/gpu/drm/msm/dpu_dbg.h b/drivers/gpu/drm/msm/dpu_dbg.h
> index e79b5aa..283dbbc 100644
> --- a/drivers/gpu/drm/msm/dpu_dbg.h
> +++ b/drivers/gpu/drm/msm/dpu_dbg.h
> @@ -71,12 +71,6 @@ enum dpu_dbg_dump_flag {
>  #define DPU_EVTLOG_BUF_MAX 512
>  #define DPU_EVTLOG_BUF_ALIGN 32
>  
> -struct dpu_dbg_power_ctrl {
> -	void *handle;
> -	void *client;
> -	int (*enable_fn)(void *handle, void *client, bool enable);
> -};
> -
>  struct dpu_dbg_evtlog_log {
>  	s64 time;
>  	const char *name;
> @@ -211,11 +205,9 @@ ssize_t dpu_evtlog_dump_to_buffer(struct dpu_dbg_evtlog *evtlog,
>  /**
>   * dpu_dbg_init - initialize global dpu debug facilities: evtlog, regdump
>   * @dev:		device handle
> - * @power_ctrl:		power control callback structure for enabling clocks
> - *			during register dumping
>   * Returns:		0 or -ERROR
>   */
> -int dpu_dbg_init(struct device *dev, struct dpu_dbg_power_ctrl *power_ctrl);
> +int dpu_dbg_init(struct device *dev);
>  
>  /**
>   * dpu_dbg_debugfs_register - register entries at the given debugfs dir
> @@ -359,8 +351,7 @@ static inline void dpu_dbg_init_dbg_buses(u32 hwversion)
>  {
>  }
>  
> -static inline int dpu_dbg_init(struct device *dev,
> -		struct dpu_dbg_power_ctrl *power_ctrl)
> +static inline int dpu_dbg_init(struct device *dev)
>  {
>  	return 0;
>  }
> diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
> index 5470529..5c267cd 100644
> --- a/drivers/gpu/drm/msm/msm_drv.c
> +++ b/drivers/gpu/drm/msm/msm_drv.c
> @@ -340,7 +340,6 @@ static int msm_drm_uninit(struct device *dev)
>  	component_unbind_all(dev, ddev);
>  
>  #ifdef CONFIG_DRM_MSM_DPU
> -	dpu_power_client_destroy(&priv->phandle, priv->pclient);
>  	dpu_power_resource_deinit(pdev, &priv->phandle);
>  	dpu_dbg_destroy();
>  #endif
> @@ -464,13 +463,6 @@ static int msm_component_bind_all(struct device *dev,
>  }
>  #endif
>  
> -#ifdef CONFIG_DRM_MSM_DPU
> -static int msm_power_enable_wrapper(void *handle, void *client, bool enable)
> -{
> -	return dpu_power_resource_enable(handle, client, enable);
> -}
> -#endif
> -
>  static int msm_drm_init(struct device *dev, struct drm_driver *drv)
>  {
>  	struct platform_device *pdev = to_platform_device(dev);
> @@ -479,10 +471,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
>  	struct msm_kms *kms;
>  	struct msm_mdss *mdss;
>  
> -#ifdef CONFIG_DRM_MSM_DPU
> -	struct dpu_dbg_power_ctrl dbg_power_ctrl = { 0 };
> -#endif
> -
>  	int ret, i;
>  	struct sched_param param;
>  
> @@ -537,18 +525,7 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
>  		goto power_init_fail;
>  	}
>  
> -	priv->pclient = dpu_power_client_create(&priv->phandle, "dpu");
> -	if (IS_ERR_OR_NULL(priv->pclient)) {
> -		pr_err("dpu power client create failed\n");
> -		ret = -EINVAL;
> -		goto power_client_fail;
> -	}
> -
> -	dbg_power_ctrl.handle = &priv->phandle;
> -	dbg_power_ctrl.client = priv->pclient;
> -	dbg_power_ctrl.enable_fn = msm_power_enable_wrapper;
> -
> -	ret = dpu_dbg_init(&pdev->dev, &dbg_power_ctrl);
> +	ret = dpu_dbg_init(&pdev->dev);
>  	if (ret) {
>  		dev_err(dev, "failed to init dpu dbg: %d\n", ret);
>  		goto dbg_init_fail;
> @@ -756,8 +733,6 @@ static int msm_drm_init(struct device *dev, struct drm_driver *drv)
>  #ifdef CONFIG_DRM_MSM_DPU
>  	dpu_dbg_destroy();
>  dbg_init_fail:
> -	dpu_power_client_destroy(&priv->phandle, priv->pclient);
> -power_client_fail:
>  	dpu_power_resource_deinit(pdev, &priv->phandle);
>  power_init_fail:
>  #endif
> diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
> index 22a3096..f9ae96f 100644
> --- a/drivers/gpu/drm/msm/msm_drv.h
> +++ b/drivers/gpu/drm/msm/msm_drv.h
> @@ -376,7 +376,6 @@ struct msm_drm_private {
>  	struct msm_kms *kms;
>  
>  	struct dpu_power_handle phandle;
> -	struct dpu_power_client *pclient;
>  
>  	/* subordinate devices, if present: */
>  	struct platform_device *gpu_pdev;
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS
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