[PATCH] drm: Rationalize DRM_MIPI_DSI inclusion in Kconfig

[Andrzej Hajda]

On 16.08.2018 20:54, Sean Paul wrote:
> From: Sean Paul <seanpaul at chromium.org>
>
> DRM_MIPI_DSI is included via both "select" and "depends on", this is
> trouble waiting to happen since this will result in different behavior
> depending on which is used.

As Thierry said 'select' is for DSI controllers, 'depends on' for DSI
devices, why is it problematic?
What kind of troubles do you expect?

>
> This patch resolves the problem by:
> - Converting all inclusion to "select" since DRM_MIPI_DSI is not a menu
>   item.
> - Remove "depends on DRM" since "select"ing DRM_MIPI_DSI won't include
>   DRM anyways, so this is misleading.

I suppose "depends on DRM" should mean the code enabled by symbol DRM_MIPI_DSI uses code enabled by symbol DRM, ie maybe removal of this symbol is OK (if dsi framework does not depends on DRM), but the reason is incorrect IMHO.

Regards
Andrzej


>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Thierry Reding <thierry.reding at gmail.com>
> Suggested-by: Daniel Vetter <daniel at ffwll.ch>
> Signed-off-by: Sean Paul <seanpaul at chromium.org>
> ---
>  drivers/gpu/drm/Kconfig       |  1 -
>  drivers/gpu/drm/panel/Kconfig | 22 +++++++++++-----------
>  2 files changed, 11 insertions(+), 12 deletions(-)
>
> diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig
> index cb88528e7b10..197691b10c6b 100644
> --- a/drivers/gpu/drm/Kconfig
> +++ b/drivers/gpu/drm/Kconfig
> @@ -25,7 +25,6 @@ menuconfig DRM
>  
>  config DRM_MIPI_DSI
>  	bool
> -	depends on DRM
>  
>  config DRM_DP_AUX_CHARDEV
>  	bool "DRM DP AUX Interface"
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index 6020c30a33b3..a1e00e9fa566 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -49,7 +49,7 @@ config DRM_PANEL_ILITEK_IL9322
>  config DRM_PANEL_ILITEK_ILI9881C
>  	tristate "Ilitek ILI9881C-based panels"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	help
>  	  Say Y if you want to enable support for panels based on the
> @@ -58,7 +58,7 @@ config DRM_PANEL_ILITEK_ILI9881C
>  config DRM_PANEL_INNOLUX_P079ZCA
>  	tristate "Innolux P079ZCA panel"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	help
>  	  Say Y here if you want to enable support for Innolux P079ZCA
> @@ -69,7 +69,7 @@ config DRM_PANEL_INNOLUX_P079ZCA
>  config DRM_PANEL_JDI_LT070ME05000
>  	tristate "JDI LT070ME05000 WUXGA DSI panel"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	help
>  	  Say Y here if you want to enable support for JDI DSI video mode
> @@ -93,7 +93,7 @@ config DRM_PANEL_LG_LG4573
>  config DRM_PANEL_ORISETECH_OTM8009A
>  	tristate "Orise Technology otm8009a 480x800 dsi 2dl panel"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	help
>  	  Say Y here if you want to enable support for Orise Technology
> @@ -102,7 +102,7 @@ config DRM_PANEL_ORISETECH_OTM8009A
>  config DRM_PANEL_PANASONIC_VVX10F034N00
>  	tristate "Panasonic VVX10F034N00 1920x1200 video mode panel"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	help
>  	  Say Y here if you want to enable support for Panasonic VVX10F034N00
> @@ -111,7 +111,7 @@ config DRM_PANEL_PANASONIC_VVX10F034N00
>  
>  config DRM_PANEL_RASPBERRYPI_TOUCHSCREEN
>  	tristate "Raspberry Pi 7-inch touchscreen panel"
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	help
>  	  Say Y here if you want to enable support for the Raspberry
>  	  Pi 7" Touchscreen.  To compile this driver as a module,
> @@ -120,7 +120,7 @@ config DRM_PANEL_RASPBERRYPI_TOUCHSCREEN
>  config DRM_PANEL_RAYDIUM_RM68200
>  	tristate "Raydium RM68200 720x1280 DSI video mode panel"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	help
>  	  Say Y here if you want to enable support for Raydium RM68200
> @@ -129,14 +129,14 @@ config DRM_PANEL_RAYDIUM_RM68200
>  config DRM_PANEL_SAMSUNG_S6E3HA2
>  	tristate "Samsung S6E3HA2 DSI video mode panel"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	select VIDEOMODE_HELPERS
>  
>  config DRM_PANEL_SAMSUNG_S6E63J0X03
>  	tristate "Samsung S6E63J0X03 DSI command mode panel"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	select VIDEOMODE_HELPERS
>  
> @@ -158,7 +158,7 @@ config DRM_PANEL_SEIKO_43WVF1G
>  config DRM_PANEL_SHARP_LQ101R1SX01
>  	tristate "Sharp LQ101R1SX01 panel"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	help
>  	  Say Y here if you want to enable support for Sharp LQ101R1SX01
> @@ -172,7 +172,7 @@ config DRM_PANEL_SHARP_LQ101R1SX01
>  config DRM_PANEL_SHARP_LS043T1LE01
>  	tristate "Sharp LS043T1LE01 qHD video mode panel"
>  	depends on OF
> -	depends on DRM_MIPI_DSI
> +	select DRM_MIPI_DSI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	help
>  	  Say Y here if you want to enable support for Sharp LS043T1LE01 qHD