Re: [Nouveau] [Intel-gfx] [PATCH 2/3] drm/dp: Move DP declarations into separate header file

From: Jani Nikula <jani.nikula@linux.intel.com>
To: Thomas Zimmermann <tzimmermann@suse.de>,
	mripard@kernel.org, maarten.lankhorst@linux.intel.com,
	airlied@linux.ie, daniel@ffwll.ch
Cc: nouveau@lists.freedesktop.org, intel-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org,
	linux-rockchip@lists.infradead.org,
	linux-arm-msm@vger.kernel.org, linux-tegra@vger.kernel.org,
	freedreno@lists.freedesktop.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [Nouveau] [Intel-gfx] [PATCH 2/3] drm/dp: Move DP declarations into separate header file
Date: Mon, 13 Dec 2021 11:59:18 +0200	[thread overview]
Message-ID: <87v8zs7rm1.fsf@intel.com> (raw)
In-Reply-To: <20211213093650.19598-3-tzimmermann@suse.de>

On Mon, 13 Dec 2021, Thomas Zimmermann <tzimmermann@suse.de> wrote:
> Split the DP declarations from other helpers before moving the
> DP functions into a separate module.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> ---
>  drivers/gpu/drm/drm_crtc_helper_internal.h | 27 ---------------------
>  drivers/gpu/drm/drm_dp_aux_dev.c           |  2 +-
>  drivers/gpu/drm/drm_dp_helper.c            |  2 +-
>  drivers/gpu/drm/drm_dp_helper_internal.h   | 28 ++++++++++++++++++++++
>  drivers/gpu/drm/drm_dp_mst_topology.c      |  2 +-
>  drivers/gpu/drm/drm_kms_helper_common.c    |  1 +
>  6 files changed, 32 insertions(+), 30 deletions(-)
>  create mode 100644 drivers/gpu/drm/drm_dp_helper_internal.h
>
> diff --git a/drivers/gpu/drm/drm_crtc_helper_internal.h b/drivers/gpu/drm/drm_crtc_helper_internal.h
> index 61e09f8a8d0f..28e04e750130 100644
> --- a/drivers/gpu/drm/drm_crtc_helper_internal.h
> +++ b/drivers/gpu/drm/drm_crtc_helper_internal.h
> @@ -28,36 +28,9 @@
>  
>  #include <drm/drm_connector.h>
>  #include <drm/drm_crtc.h>
> -#include <drm/drm_dp_helper.h>
>  #include <drm/drm_encoder.h>
>  #include <drm/drm_modes.h>
>  
> -/* drm_dp_aux_dev.c */
> -#ifdef CONFIG_DRM_DP_AUX_CHARDEV
> -int drm_dp_aux_dev_init(void);
> -void drm_dp_aux_dev_exit(void);
> -int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
> -void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
> -#else
> -static inline int drm_dp_aux_dev_init(void)
> -{
> -	return 0;
> -}
> -
> -static inline void drm_dp_aux_dev_exit(void)
> -{
> -}
> -
> -static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
> -{
> -	return 0;
> -}
> -
> -static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
> -{
> -}
> -#endif
> -
>  /* drm_probe_helper.c */
>  enum drm_mode_status drm_crtc_mode_valid(struct drm_crtc *crtc,
>  					 const struct drm_display_mode *mode);
> diff --git a/drivers/gpu/drm/drm_dp_aux_dev.c b/drivers/gpu/drm/drm_dp_aux_dev.c
> index 06b374cae956..0618dfe16660 100644
> --- a/drivers/gpu/drm/drm_dp_aux_dev.c
> +++ b/drivers/gpu/drm/drm_dp_aux_dev.c
> @@ -40,7 +40,7 @@
>  #include <drm/drm_dp_mst_helper.h>
>  #include <drm/drm_print.h>
>  
> -#include "drm_crtc_helper_internal.h"
> +#include "drm_dp_helper_internal.h"
>  
>  struct drm_dp_aux_dev {
>  	unsigned index;
> diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
> index 23f9073bc473..e995a0262ed7 100644
> --- a/drivers/gpu/drm/drm_dp_helper.c
> +++ b/drivers/gpu/drm/drm_dp_helper.c
> @@ -35,7 +35,7 @@
>  #include <drm/drm_dp_mst_helper.h>
>  #include <drm/drm_panel.h>
>  
> -#include "drm_crtc_helper_internal.h"
> +#include "drm_dp_helper_internal.h"
>  
>  struct dp_aux_backlight {
>  	struct backlight_device *base;
> diff --git a/drivers/gpu/drm/drm_dp_helper_internal.h b/drivers/gpu/drm/drm_dp_helper_internal.h
> new file mode 100644
> index 000000000000..5c9f8bb0c99a
> --- /dev/null
> +++ b/drivers/gpu/drm/drm_dp_helper_internal.h
> @@ -0,0 +1,28 @@
> +/* SPDX-License-Identifier: MIT */
> +
> +#include <drm/drm_dp_helper.h>

Please don't include other headers if you can avoid them by using
forward declarations.

BR,
Jani.

> +
> +#ifdef CONFIG_DRM_DP_AUX_CHARDEV
> +int drm_dp_aux_dev_init(void);
> +void drm_dp_aux_dev_exit(void);
> +int drm_dp_aux_register_devnode(struct drm_dp_aux *aux);
> +void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux);
> +#else
> +static inline int drm_dp_aux_dev_init(void)
> +{
> +	return 0;
> +}
> +
> +static inline void drm_dp_aux_dev_exit(void)
> +{
> +}
> +
> +static inline int drm_dp_aux_register_devnode(struct drm_dp_aux *aux)
> +{
> +	return 0;
> +}
> +
> +static inline void drm_dp_aux_unregister_devnode(struct drm_dp_aux *aux)
> +{
> +}
> +#endif
> diff --git a/drivers/gpu/drm/drm_dp_mst_topology.c b/drivers/gpu/drm/drm_dp_mst_topology.c
> index 7f0ff96261cf..9f7b0b606924 100644
> --- a/drivers/gpu/drm/drm_dp_mst_topology.c
> +++ b/drivers/gpu/drm/drm_dp_mst_topology.c
> @@ -45,7 +45,7 @@
>  #include <drm/drm_print.h>
>  #include <drm/drm_probe_helper.h>
>  
> -#include "drm_crtc_helper_internal.h"
> +#include "drm_dp_helper_internal.h"
>  #include "drm_dp_mst_topology_internal.h"
>  
>  /**
> diff --git a/drivers/gpu/drm/drm_kms_helper_common.c b/drivers/gpu/drm/drm_kms_helper_common.c
> index 47e92400548d..88260d26409c 100644
> --- a/drivers/gpu/drm/drm_kms_helper_common.c
> +++ b/drivers/gpu/drm/drm_kms_helper_common.c
> @@ -29,6 +29,7 @@
>  
>  #include <drm/drm_print.h>
>  
> +#include "drm_dp_helper_internal.h"
>  #include "drm_crtc_helper_internal.h"
>  
>  MODULE_AUTHOR("David Airlie, Jesse Barnes");

-- 
Jani Nikula, Intel Open Source Graphics Center