linux-kernel - Re: [PATCH 3/9] drm/arm/hdlcd: use new debugfs device-centered functions

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Date:   Tue, 3 Jan 2023 13:48:54 +0000
From:   Liviu Dudau <liviu.dudau@....com>
To:     Maíra Canal <mcanal@...lia.com>
Cc:     David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        André Almeida <andrealmeid@...lia.com>,
        Tomi Valkeinen <tomba@...nel.org>,
        Emma Anholt <emma@...olt.net>,
        Alexey Brodkin <abrodkin@...opsys.com>,
        etnaviv@...ts.freedesktop.org,
        Gurchetan Singh <gurchetansingh@...omium.org>,
        Melissa Wen <mwen@...lia.com>, noralf@...nnes.org,
        Gerd Hoffmann <kraxel@...hat.com>,
        Russell King <linux+etnaviv@...linux.org.uk>,
        David Airlie <airlied@...hat.com>
Subject: Re: [PATCH 3/9] drm/arm/hdlcd: use new debugfs device-centered
 functions

On Mon, Dec 26, 2022 at 12:50:23PM -0300, Maíra Canal wrote:
> Replace the use of drm_debugfs_create_files() with the new
> drm_debugfs_add_files() function, which center the debugfs files
> management on the drm_device instead of drm_minor. Moreover, remove the
> debugfs_init hook and add the debugfs files directly on hdlcd_drm_bind(),
> before drm_dev_register().
> 
> Signed-off-by: Maíra Canal <mcanal@...lia.com>

Acked-by: Liviu Dudau <liviu.dudau@....com>

Best regards,
Liviu

> ---
>  drivers/gpu/drm/arm/hdlcd_drv.c | 24 +++++++++---------------
>  1 file changed, 9 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/gpu/drm/arm/hdlcd_drv.c b/drivers/gpu/drm/arm/hdlcd_drv.c
> index 7043d1c9ed8f..e3507dd6f82a 100644
> --- a/drivers/gpu/drm/arm/hdlcd_drv.c
> +++ b/drivers/gpu/drm/arm/hdlcd_drv.c
> @@ -195,8 +195,8 @@ static int hdlcd_setup_mode_config(struct drm_device *drm)
>  #ifdef CONFIG_DEBUG_FS
>  static int hdlcd_show_underrun_count(struct seq_file *m, void *arg)
>  {
> -	struct drm_info_node *node = (struct drm_info_node *)m->private;
> -	struct drm_device *drm = node->minor->dev;
> +	struct drm_debugfs_entry *entry = m->private;
> +	struct drm_device *drm = entry->dev;
>  	struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
>  
>  	seq_printf(m, "underrun : %d\n", atomic_read(&hdlcd->buffer_underrun_count));
> @@ -208,8 +208,8 @@ static int hdlcd_show_underrun_count(struct seq_file *m, void *arg)
>  
>  static int hdlcd_show_pxlclock(struct seq_file *m, void *arg)
>  {
> -	struct drm_info_node *node = (struct drm_info_node *)m->private;
> -	struct drm_device *drm = node->minor->dev;
> +	struct drm_debugfs_entry *entry = m->private;
> +	struct drm_device *drm = entry->dev;
>  	struct hdlcd_drm_private *hdlcd = drm_to_hdlcd_priv(drm);
>  	unsigned long clkrate = clk_get_rate(hdlcd->clk);
>  	unsigned long mode_clock = hdlcd->crtc.mode.crtc_clock * 1000;
> @@ -219,17 +219,10 @@ static int hdlcd_show_pxlclock(struct seq_file *m, void *arg)
>  	return 0;
>  }
>  
> -static struct drm_info_list hdlcd_debugfs_list[] = {
> +static struct drm_debugfs_info hdlcd_debugfs_list[] = {
>  	{ "interrupt_count", hdlcd_show_underrun_count, 0 },
>  	{ "clocks", hdlcd_show_pxlclock, 0 },
>  };
> -
> -static void hdlcd_debugfs_init(struct drm_minor *minor)
> -{
> -	drm_debugfs_create_files(hdlcd_debugfs_list,
> -				 ARRAY_SIZE(hdlcd_debugfs_list),
> -				 minor->debugfs_root, minor);
> -}
>  #endif
>  
>  DEFINE_DRM_GEM_DMA_FOPS(fops);
> @@ -237,9 +230,6 @@ DEFINE_DRM_GEM_DMA_FOPS(fops);
>  static const struct drm_driver hdlcd_driver = {
>  	.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
>  	DRM_GEM_DMA_DRIVER_OPS,
> -#ifdef CONFIG_DEBUG_FS
> -	.debugfs_init = hdlcd_debugfs_init,
> -#endif
>  	.fops = &fops,
>  	.name = "hdlcd",
>  	.desc = "ARM HDLCD Controller DRM",
> @@ -303,6 +293,10 @@ static int hdlcd_drm_bind(struct device *dev)
>  	drm_mode_config_reset(drm);
>  	drm_kms_helper_poll_init(drm);
>  
> +#ifdef CONFIG_DEBUG_FS
> +	drm_debugfs_add_files(drm, hdlcd_debugfs_list, ARRAY_SIZE(hdlcd_debugfs_list));
> +#endif
> +
>  	ret = drm_dev_register(drm, 0);
>  	if (ret)
>  		goto err_register;
> -- 
> 2.38.1
> 

-- 
====================
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| but they're not |
| giving me the   |
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