Subject: Re: [PATCH v1 18/26] drm/panel: rocktech-jh057n00900: use drm_panel backlight support

From: Guido Günther <[email-masked]>
Date: Wed, 4 Dec 2019 13:04:16 +0100

Hi,
On Mon, Dec 02, 2019 at 08:32:22PM +0100, Sam Ravnborg wrote:
> Use the backlight support in drm_panel to simplify the driver.
> While touching the include files sort them
> and divide them up in blocks.
> 
> Signed-off-by: Sam Ravnborg <[email-masked]>
> Cc: "Guido Günther" <[email-masked]>
> Cc: Purism Kernel Team <[email-masked]>
> Cc: Thierry Reding <[email-masked]>
> Cc: Sam Ravnborg <[email-masked]>
> ---
>  .../drm/panel/panel-rocktech-jh057n00900.c    | 24 +++++++++----------
>  1 file changed, 12 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c b/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
> index 3a4f1c0fce86..38ff742bc120 100644
> --- a/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
> +++ b/drivers/gpu/drm/panel/panel-rocktech-jh057n00900.c
> @@ -5,20 +5,22 @@
>   * Copyright (C) Purism SPC 2019
>   */
>  
> -#include <drm/drm_mipi_dsi.h>
> -#include <drm/drm_modes.h>
> -#include <drm/drm_panel.h>
> -#include <drm/drm_print.h>
> -#include <linux/backlight.h>
>  #include <linux/debugfs.h>
>  #include <linux/delay.h>
>  #include <linux/gpio/consumer.h>
>  #include <linux/media-bus-format.h>
> +#include <linux/mod_devicetable.h>
>  #include <linux/module.h>
>  #include <linux/regulator/consumer.h>
> +
>  #include <video/display_timing.h>
>  #include <video/mipi_display.h>
>  
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_modes.h>
> +#include <drm/drm_panel.h>
> +#include <drm/drm_print.h>
> +
>  #define DRV_NAME "panel-rocktech-jh057n00900"
>  
>  /* Manufacturer specific Commands send via DSI */
> @@ -47,7 +49,6 @@ struct jh057n {
>  	struct device *dev;
>  	struct drm_panel panel;
>  	struct gpio_desc *reset_gpio;
> -	struct backlight_device *backlight;
>  	struct regulator *vcc;
>  	struct regulator *iovcc;
>  	bool prepared;
> @@ -152,7 +153,7 @@ static int jh057n_enable(struct drm_panel *panel)
>  		return ret;
>  	}
>  
> -	return backlight_enable(ctx->backlight);
> +	return 0;
>  }
>  
>  static int jh057n_disable(struct drm_panel *panel)
> @@ -160,7 +161,6 @@ static int jh057n_disable(struct drm_panel *panel)
>  	struct jh057n *ctx = panel_to_jh057n(panel);
>  	struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
>  
> -	backlight_disable(ctx->backlight);
>  	return mipi_dsi_dcs_set_display_off(dsi);
>  }
>  
> @@ -321,10 +321,6 @@ static int jh057n_probe(struct mipi_dsi_device *dsi)
>  	dsi->mode_flags = MIPI_DSI_MODE_VIDEO |
>  		MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_VIDEO_SYNC_PULSE;
>  
> -	ctx->backlight = devm_of_find_backlight(dev);
> -	if (IS_ERR(ctx->backlight))
> -		return PTR_ERR(ctx->backlight);
> -
>  	ctx->vcc = devm_regulator_get(dev, "vcc");
>  	if (IS_ERR(ctx->vcc)) {
>  		ret = PTR_ERR(ctx->vcc);
> @@ -347,6 +343,10 @@ static int jh057n_probe(struct mipi_dsi_device *dsi)
>  	drm_panel_init(&ctx->panel, dev, &jh057n_drm_funcs,
>  		       DRM_MODE_CONNECTOR_DSI);
>  
> +	ret = drm_panel_of_backlight(&ctx->panel);
> +	if (ret)
> +		return ret;
> +
>  	drm_panel_add(&ctx->panel);
>  
>  	ret = mipi_dsi_attach(dsi);

Reviewed-by: Guido Günther <[email-masked]> 

> -- 
> 2.20.1

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