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drm/client: Make client support optional

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Only build client code if DRM_CLIENT has been selected. Automatially
do so if one of the default clients has been enabled. If client support
has been disabled, the helpers for client-related events are empty and
the regular client functions are not present.

Amdgpu has an internal DRM client, so it has to select DRM_CLIENT by
itself unconditionally.

v3:
- provide empty drm_client_debugfs_init() if DRM_CLIENT=n (kernel
  test robot)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: Xinhui Pan <Xinhui.Pan@amd.com>
Reviewed-by: Jonathan Cavitt <jonathan.cavitt@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241014085740.582287-12-tzimmermann@suse.de
This commit is contained in:
Thomas Zimmermann 2024-10-14 10:55:25 +02:00
parent 88c79de857
commit 1f828b4dd4
8 changed files with 38 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/Kconfig
View File

@ -210,6 +210,15 @@ config DRM_DEBUG_MODESET_LOCK
If in doubt, say "N".
config DRM_CLIENT
bool
depends on DRM
help
Enables support for DRM clients. DRM drivers that need
struct drm_client_dev and its interfaces should select this
option. Drivers that support the default clients should
select DRM_CLIENT_SELECTION instead.
config DRM_CLIENT_SELECTION
bool
depends on DRM
@ -225,6 +234,7 @@ config DRM_CLIENT_SETUP
config DRM_FBDEV_EMULATION
bool "Enable legacy fbdev support for your modesetting driver"
depends on DRM
select DRM_CLIENT
select FRAMEBUFFER_CONSOLE_DETECT_PRIMARY if FRAMEBUFFER_CONSOLE
default FB
help

7
drivers/gpu/drm/Makefile
View File

@ -40,9 +40,6 @@ drm-y := \
drm_blend.o \
drm_bridge.o \
drm_cache.o \
drm_client.o \
drm_client_event.o \
drm_client_modeset.o \
drm_color_mgmt.o \
drm_connector.o \
drm_crtc.o \
@ -76,6 +73,10 @@ drm-y := \
drm_vblank_work.o \
drm_vma_manager.o \
drm_writeback.o
drm-$(CONFIG_DRM_CLIENT) += \
drm_client.o \
drm_client_event.o \
drm_client_modeset.o
drm-$(CONFIG_DRM_LIB_RANDOM) += lib/drm_random.o
drm-$(CONFIG_COMPAT) += drm_ioc32.o
drm-$(CONFIG_DRM_PANEL) += drm_panel.o

1
drivers/gpu/drm/amd/amdgpu/Kconfig
View File

@ -5,6 +5,7 @@ config DRM_AMDGPU
depends on DRM && PCI && MMU
depends on !UML
select FW_LOADER
select DRM_CLIENT
select DRM_CLIENT_SELECTION
select DRM_DISPLAY_DP_HELPER
select DRM_DISPLAY_DSC_HELPER

2
drivers/gpu/drm/drm_client_event.c
View File

@ -14,6 +14,8 @@
#include <drm/drm_drv.h>
#include <drm/drm_print.h>
#include "drm_internal.h"
/**
* drm_client_dev_unregister - Unregister clients
* @dev: DRM device

1
drivers/gpu/drm/drm_debugfs.c
View File

@ -32,7 +32,6 @@
#include <drm/drm_atomic.h>
#include <drm/drm_auth.h>
#include <drm/drm_bridge.h>
#include <drm/drm_client.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>

8
drivers/gpu/drm/drm_internal.h
View File

@ -48,6 +48,14 @@ struct drm_prime_file_private;
struct drm_printer;
struct drm_vblank_crtc;
/* drm_client_event.c */
#if defined(CONFIG_DRM_CLIENT)
void drm_client_debugfs_init(struct drm_device *dev);
#else
static inline void drm_client_debugfs_init(struct drm_device *dev)
{ }
#endif
/* drm_file.c */
extern struct mutex drm_global_mutex;
bool drm_dev_needs_global_mutex(struct drm_device *dev);

2
include/drm/drm_client.h
View File

@ -236,6 +236,4 @@ int drm_client_modeset_dpms(struct drm_client_dev *client, int mode);
drm_for_each_connector_iter(connector, iter) \
if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK)
void drm_client_debugfs_init(struct drm_device *dev);
#endif

13
include/drm/drm_client_event.h
View File

@ -5,10 +5,23 @@
struct drm_device;
#if defined(CONFIG_DRM_CLIENT)
void drm_client_dev_unregister(struct drm_device *dev);
void drm_client_dev_hotplug(struct drm_device *dev);
void drm_client_dev_restore(struct drm_device *dev);
void drm_client_dev_suspend(struct drm_device *dev, bool holds_console_lock);
void drm_client_dev_resume(struct drm_device *dev, bool holds_console_lock);
#else
static inline void drm_client_dev_unregister(struct drm_device *dev)
{ }
static inline void drm_client_dev_hotplug(struct drm_device *dev)
{ }
static inline void drm_client_dev_restore(struct drm_device *dev)
{ }
static inline void drm_client_dev_suspend(struct drm_device *dev, bool holds_console_lock)
{ }
static inline void drm_client_dev_resume(struct drm_device *dev, bool holds_console_lock)
{ }
#endif
#endif