kernel/linux.git/drivers/gpu/drm/drm_fbdev_shmem.c, branch v6.18.22

drm/client: Include

2025-06-16T07:02:29+00:00

Fixes the compile-time warnings drivers/gpu/drm/clients/drm_client_setup.c: warning: EXPORT_SYMBOL() is used, but #include is missing drivers/gpu/drm/drm_client.c: warning: EXPORT_SYMBOL() is used, but #include is missing drivers/gpu/drm/drm_client_event.c: warning: EXPORT_SYMBOL() is used, but #include is missing drivers/gpu/drm/drm_client_modeset.c: warning: EXPORT_SYMBOL() is used, but #include is missing drivers/gpu/drm/drm_fb_helper.c: warning: EXPORT_SYMBOL() is used, but #include is missing drivers/gpu/drm/drm_fbdev_dma.c: warning: EXPORT_SYMBOL() is used, but #include is missing drivers/gpu/drm/drm_fbdev_shmem.c: warning: EXPORT_SYMBOL() is used, but #include is missing drivers/gpu/drm/drm_fbdev_ttm.c: warning: EXPORT_SYMBOL() is used, but #include is missing Signed-off-by: Thomas Zimmermann Fixes: a934a57a42f6 ("scripts/misc-check: check missing #include when W=1") Reviewed-by: André Almeida Cc: Masahiro Yamada Cc: Nathan Chancellor Link: https://lore.kernel.org/r/20250612121633.229222-5-tzimmermann@suse.de

drm/fbdev-shmem: Remove obsolete setup function

2024-09-26T07:31:28+00:00

The old setup function drm_fbdev_shmem_setup() is unused. Remove it and its internal callbacks. New drivers should call drm_client_setup() instead. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-64-tzimmermann@suse.de

drm/fbdev-shmem: Support struct drm_driver.fbdev_probe

2024-09-26T07:31:27+00:00

Rework fbdev probing to support fbdev_probe in struct drm_driver and reimplement the old fb_probe callback on top of it. Provide an initializer macro for struct drm_driver that sets the callback according to the kernel configuration. This change allows the common fbdev client to run on top of SHMEM- based DRM drivers. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-50-tzimmermann@suse.de

drm/fbdev-shmem: Clean up deferred I/O

2024-05-15T12:50:46+00:00

Call fb_deferred_io_cleanup() upon destroying the framebuffer device. Releases the internal memory. Signed-off-by: Thomas Zimmermann Fixes: 150f431a0831 ("drm/fbdev: Add fbdev-shmem") Cc: Thomas Zimmermann Cc: Javier Martinez Canillas Cc: Maarten Lankhorst Cc: Maxime Ripard Cc: David Airlie Cc: Daniel Vetter Cc: dri-devel@lists.freedesktop.org Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20240507152329.3085-1-tzimmermann@suse.de

drm/fbdev: Add fbdev-shmem

2024-05-02T09:33:15+00:00

Add an fbdev emulation for SHMEM-based memory managers. The code is similar to fbdev-generic, but does not require an additional shadow buffer for mmap(). Fbdev-shmem operates directly on the buffer object's SHMEM pages. Fbdev's deferred-I/O mechanism updates the hardware state on write operations. The memory pages of GEM SHMEM cannot be detected by fbdefio. Therefore fbdev-shmem implements the .get_page() hook in struct fb_deferred_io. The fbdefio helpers call this hook to retrieve the page directly from fbdev-shmem instead of trying to detect it internally. v3: - clarify on get_page mechanism in commit description (Javier) v2: - use drm_driver_legacy_fb_format() (Geert) Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-9-tzimmermann@suse.de