linux-kernel - Re: [PATCH v16 02/10] drm/tinydrm: Convert tinydrm_enable/disable_backlight to backlight

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Date:   Tue, 16 Jan 2018 17:51:33 +0100
From:   Noralf Trønnes <noralf@...nnes.org>
To:     Meghana Madhyastha <meghana.madhyastha@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Daniel Thompson <daniel.thompson@...aro.org>,
        Jingoo Han <jingoohan1@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        Daniel Vetter <daniel.vetter@...el.com>,
        Sean Paul <seanpaul@...omium.org>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v16 02/10] drm/tinydrm: Convert
 tinydrm_enable/disable_backlight to backlight_enable/disable


Den 16.01.2018 11.32, skrev Meghana Madhyastha:
> Remove tinydrm_enable/disable_backlight and let the callers call the
> more generic backlight_enable/disable helpers
>
> Signed-off-by: Meghana Madhyastha <meghana.madhyastha@...il.com>

This patch needs to be rebased on some recent changes to mipi-dbi.

Reviewed-by: Noralf Trønnes <noralf@...nnes.org>

> ---
>   drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c | 55 --------------------------
>   drivers/gpu/drm/tinydrm/mipi-dbi.c             |  4 +-
>   include/drm/tinydrm/tinydrm-helpers.h          |  2 -
>   3 files changed, 2 insertions(+), 59 deletions(-)
>
> diff --git a/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c b/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c
> index bf96072d1..7326e1758 100644
> --- a/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c
> +++ b/drivers/gpu/drm/tinydrm/core/tinydrm-helpers.c
> @@ -276,61 +276,6 @@ struct backlight_device *tinydrm_of_find_backlight(struct device *dev)
>   }
>   EXPORT_SYMBOL(tinydrm_of_find_backlight);
>   
> -/**
> - * tinydrm_enable_backlight - Enable backlight helper
> - * @backlight: Backlight device
> - *
> - * Returns:
> - * Zero on success, negative error code on failure.
> - */
> -int tinydrm_enable_backlight(struct backlight_device *backlight)
> -{
> -	unsigned int old_state;
> -	int ret;
> -
> -	if (!backlight)
> -		return 0;
> -
> -	old_state = backlight->props.state;
> -	backlight->props.state &= ~BL_CORE_FBBLANK;
> -	DRM_DEBUG_KMS("Backlight state: 0x%x -> 0x%x\n", old_state,
> -		      backlight->props.state);
> -
> -	ret = backlight_update_status(backlight);
> -	if (ret)
> -		DRM_ERROR("Failed to enable backlight %d\n", ret);
> -
> -	return ret;
> -}
> -EXPORT_SYMBOL(tinydrm_enable_backlight);
> -
> -/**
> - * tinydrm_disable_backlight - Disable backlight helper
> - * @backlight: Backlight device
> - *
> - * Returns:
> - * Zero on success, negative error code on failure.
> - */
> -int tinydrm_disable_backlight(struct backlight_device *backlight)
> -{
> -	unsigned int old_state;
> -	int ret;
> -
> -	if (!backlight)
> -		return 0;
> -
> -	old_state = backlight->props.state;
> -	backlight->props.state |= BL_CORE_FBBLANK;
> -	DRM_DEBUG_KMS("Backlight state: 0x%x -> 0x%x\n", old_state,
> -		      backlight->props.state);
> -	ret = backlight_update_status(backlight);
> -	if (ret)
> -		DRM_ERROR("Failed to disable backlight %d\n", ret);
> -
> -	return ret;
> -}
> -EXPORT_SYMBOL(tinydrm_disable_backlight);
> -
>   #if IS_ENABLED(CONFIG_SPI)
>   
>   /**
> diff --git a/drivers/gpu/drm/tinydrm/mipi-dbi.c b/drivers/gpu/drm/tinydrm/mipi-dbi.c
> index aa6b6ce56..8c2cb1cf2 100644
> --- a/drivers/gpu/drm/tinydrm/mipi-dbi.c
> +++ b/drivers/gpu/drm/tinydrm/mipi-dbi.c
> @@ -291,7 +291,7 @@ void mipi_dbi_pipe_enable(struct drm_simple_display_pipe *pipe,
>   	if (fb)
>   		fb->funcs->dirty(fb, NULL, 0, 0, NULL, 0);
>   
> -	tinydrm_enable_backlight(mipi->backlight);
> +	backlight_enable(mipi->backlight);
>   }
>   EXPORT_SYMBOL(mipi_dbi_pipe_enable);
>   
> @@ -330,7 +330,7 @@ void mipi_dbi_pipe_disable(struct drm_simple_display_pipe *pipe)
>   	mipi->enabled = false;
>   
>   	if (mipi->backlight)
> -		tinydrm_disable_backlight(mipi->backlight);
> +		backlight_disable(mipi->backlight);
>   	else
>   		mipi_dbi_blank(mipi);
>   }
> diff --git a/include/drm/tinydrm/tinydrm-helpers.h b/include/drm/tinydrm/tinydrm-helpers.h
> index d554ded60..f54fae03e 100644
> --- a/include/drm/tinydrm/tinydrm-helpers.h
> +++ b/include/drm/tinydrm/tinydrm-helpers.h
> @@ -47,8 +47,6 @@ void tinydrm_xrgb8888_to_gray8(u8 *dst, void *vaddr, struct drm_framebuffer *fb,
>   			       struct drm_clip_rect *clip);
>   
>   struct backlight_device *tinydrm_of_find_backlight(struct device *dev);
> -int tinydrm_enable_backlight(struct backlight_device *backlight);
> -int tinydrm_disable_backlight(struct backlight_device *backlight);
>   
>   size_t tinydrm_spi_max_transfer_size(struct spi_device *spi, size_t max_len);
>   bool tinydrm_spi_bpw_supported(struct spi_device *spi, u8 bpw);