Re: [PATCH v2 01/10] drm: Include <linux/backlight.h> where needed

[Sam Ravnborg <sam@ravnborg.org>]

Hi Thomas,
On Wed, Jan 11, 2023 at 02:01:57PM +0100, Thomas Zimmermann wrote:
> Include <linux/backlight.h> in source files that need it. Some of
> DRM's source code gets the backlight header via drm_crtc_helper.h
> and <linux/fb.h>, which can leed to unnecessary recompilation. If
> possible, do not include drm_crtc_helper.h any longer.
Are you planning a clean-up of drm_crtc_helper.h later?
With a handful of forward it could losse all includes.

> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
> Acked-by: Christian König <christian.koenig@amd.com> # amd
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
> ---
>  drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c          | 2 +-
>  drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 1 +
>  drivers/gpu/drm/gma500/backlight.c                | 2 ++
>  drivers/gpu/drm/radeon/radeon_acpi.c              | 2 +-
>  4 files changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
> index 57b5e11446c6..f29c1d0ad4c1 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
> @@ -24,6 +24,7 @@
>  
>  #include <linux/pci.h>
>  #include <linux/acpi.h>
> +#include <linux/backlight.h>
>  #include <linux/slab.h>
>  #include <linux/power_supply.h>
>  #include <linux/pm_runtime.h>
> @@ -31,7 +32,6 @@
>  #include <acpi/video.h>
>  #include <acpi/actbl.h>
>  
> -#include <drm/drm_crtc_helper.h>
>  #include "amdgpu.h"
>  #include "amdgpu_pm.h"
>  #include "amdgpu_display.h"
> diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> index 1b7f20a9d4ae..55a845eb0c6d 100644
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -67,6 +67,7 @@
>  #include "ivsrcid/ivsrcid_vislands30.h"
>  
>  #include "i2caux_interface.h"
> +#include <linux/backlight.h>
>  #include <linux/module.h>
>  #include <linux/moduleparam.h>
>  #include <linux/types.h>
> diff --git a/drivers/gpu/drm/gma500/backlight.c b/drivers/gpu/drm/gma500/backlight.c
> index 577a4987b193..8711a7a5b8da 100644
> --- a/drivers/gpu/drm/gma500/backlight.c
> +++ b/drivers/gpu/drm/gma500/backlight.c
> @@ -7,6 +7,8 @@
>   * Authors: Eric Knopp
>   */
>  
> +#include <linux/backlight.h>
> +
>  #include <acpi/video.h>
>  
>  #include "psb_drv.h"
> diff --git a/drivers/gpu/drm/radeon/radeon_acpi.c b/drivers/gpu/drm/radeon/radeon_acpi.c
> index b603c0b77075..5771d1fcb073 100644
> --- a/drivers/gpu/drm/radeon/radeon_acpi.c
> +++ b/drivers/gpu/drm/radeon/radeon_acpi.c
> @@ -22,6 +22,7 @@
>   */
>  
>  #include <linux/acpi.h>
> +#include <linux/backlight.h>
>  #include <linux/pci.h>
>  #include <linux/pm_runtime.h>
>  #include <linux/power_supply.h>
> @@ -30,7 +31,6 @@
>  #include <acpi/acpi_bus.h>
>  #include <acpi/video.h>
>  
> -#include <drm/drm_crtc_helper.h>
>  #include <drm/drm_probe_helper.h>
>  
>  #include "atom.h"
> -- 
> 2.39.0