On 2022-06-14 11:57, Randy Dunlap wrote:
> Fix build error when CONFIG_DEBUG_FS is not enabled by adding a
> stub function for crtc_debugfs_init().
>
> Eliminates this build error:
>
> ../drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c: In function
> ‘amdgpu_dm_crtc_late_register’:
> ../drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:6599:2: error:
> implicit declaration of function ‘crtc_debugfs_init’; did you mean
> ‘amdgpu_debugfs_init’? [-Werror=implicit-function-declaration]
> crtc_debugfs_init(crtc);
> ^~~~~~~~~~~~~~~~~
> amdgpu_debugfs_init
>
> Fixes: 86bc22191892 ("drm/amd/display: Support crc on specific region")
That whole patch and the whole secure display feature depend on debugfs.
It should never try building without CONFIG_DEBUG_FS.
See drivers/gpu/drm/amd/display/Kconfig:
> config DRM_AMD_SECURE_DISPLAY
> bool "Enable secure display support"
> default n
> depends on DEBUG_FS
> depends on DRM_AMD_DC_DCN
> help
> Choose this option if you want to
> support secure display
>
> This option enables the calculation
> of crc of specific region via debugfs.
> Cooperate with specific DMCU FW.
amdgpu_dm_crtc_late_register is guarded by CONIG_DRM_AMD_SECURE_DISPLAY.
Harry
> Signed-off-by: Randy Dunlap <rdun...@infradead.org>
> Cc: Wayne Lin <wayne....@amd.com>
> Cc: Alex Deucher <alexander.deuc...@amd.com>
> Cc: Christian König <christian.koe...@amd.com>
> Cc: "Pan, Xinhui" <xinhui....@amd.com>
> Cc: amd-...@lists.freedesktop.org
> Cc: dri-devel@lists.freedesktop.org
> ---
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 --
> drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.h | 6 ++++++
> 2 files changed, 6 insertions(+), 2 deletions(-)
>
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
> @@ -57,9 +57,7 @@
> #include "amdgpu_dm_irq.h"
> #include "dm_helpers.h"
> #include "amdgpu_dm_mst_types.h"
> -#if defined(CONFIG_DEBUG_FS)
> #include "amdgpu_dm_debugfs.h"
> -#endif
> #include "amdgpu_dm_psr.h"
>
> #include "ivsrcid/ivsrcid_vislands30.h"
> --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.h
> +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.h
> @@ -31,6 +31,12 @@
>
> void connector_debugfs_init(struct amdgpu_dm_connector *connector);
> void dtn_debugfs_init(struct amdgpu_device *adev);
> +
> +#ifdef CONFIG_DEBUG_FS
> void crtc_debugfs_init(struct drm_crtc *crtc);
> +#else
> +static inline void crtc_debugfs_init(struct drm_crtc *crtc)
> +{}
> +#endif
>
> #endif
