kernel/include/drm/drm_fb_helper.h, branch linux-6.18.y

drm/fb-helper: Remove struct drm_fb_helper.fb_probe

2025-03-05T20:48:50Z

The callback fb_probe in struct drm_fb_helper is unused. Remove it. New drivers should set struct drm_driver.fbdev_probe instead and call drm_client_setup() to instantiate in-kernel DRM clients. Signed-off-by: Thomas Zimmermann Reviewed-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20241212170913.185939-13-tzimmermann@suse.de Signed-off-by: Maarten Lankhorst

drm/i915/display: fbdev: Move custom suspend code to new callback

2025-03-05T20:48:49Z

If the fbdev buffer is backed by stolen memory, it has to be cleared upon resume from hibernation. Move the code into the new callback fb_set_suspend, so that it can run from DRM's generic fbdev client. No functional change. Other drivers are not affected. Signed-off-by: Thomas Zimmermann Reviewed-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20241212170913.185939-7-tzimmermann@suse.de Signed-off-by: Maarten Lankhorst

drm/i915/display: fbdev: Move custom restore code to new callback

2025-03-05T20:48:49Z

i915's fbdev contains code for restoring the client's framebuffer. It is specific to i195 and cannot be ported to the common fbdev client. Introduce the callback struct drm_fb_helper.fb_restore and implement it for i915. The fbdev helpers invoke the callback after restoring the fbdev client. Signed-off-by: Thomas Zimmermann Reviewed-by: Maarten Lankhorst Link: https://patchwork.freedesktop.org/patch/msgid/20241212170913.185939-6-tzimmermann@suse.de Signed-off-by: Maarten Lankhorst

drm/fbdev: fix drm_fb_helper_deferred_io() build failure

2024-10-22T08:46:28Z

The drm_fb_helper_deferred_io() uses struct fb_deferred_io_pageref, which isn't available without CONFIG_FB_DEFERRED_IO. Put the function under corresponding #ifdef to fix build failure if deferred I/O isn't enabled. Fixes: 8058944f5226 ("drm/fbdev: Select fbdev I/O helpers from modules that require them") Signed-off-by: Dmitry Baryshkov Reviewed-by: Thomas Zimmermann Signed-off-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20241021-fix-drm-deferred-v2-1-db1de4c6b042@linaro.org

drm/fbdev-helper: Remove drm_fb_helper_output_poll_changed()

2024-08-13T14:21:11Z

The function is unused. Remove it. Signed-off-by: Thomas Zimmermann Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20240812083000.337744-8-tzimmermann@suse.de

drm/fb-helper: Remove unused inline function drm_fb_helper_defio_init()

2023-07-25T18:38:37Z

Since commit 8e86dee02253 ("drm/fb-helper: Remove drm_fb_helper_defio_init() and update docs") this inline helper not used anymore. Fixes: 8e86dee02253 ("drm/fb-helper: Remove drm_fb_helper_defio_init() and update docs") Signed-off-by: YueHaibing Reviewed-by: Thomas Zimmermann Signed-off-by: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20230725021317.8080-1-yuehaibing@huawei.com

drm/i915: Implement dedicated fbdev I/O helpers

2023-06-01T10:41:40Z

Implement dedicated fbdev helpers for framebuffer I/O instead of using DRM's helpers. Use an fbdev generator macro for deferred I/O to create the fbdev callbacks. i915 was the only caller of the DRM helpers, so remove them from the helper module. i915's fbdev emulation is still incomplete as it doesn't implement deferred I/O and damage handling for mmaped pages. v4: * generate deferred-I/O helpers * use initializer macros for fb_ops v2: * use FB_IO_HELPERS options Signed-off-by: Thomas Zimmermann Reviewed-by: Sam Ravnborg Cc: Jani Nikula Cc: Joonas Lahtinen Cc: Rodrigo Vivi Cc: Tvrtko Ursulin Cc: "Ville Syrjälä" Link: https://patchwork.freedesktop.org/patch/msgid/20230530151228.22979-14-tzimmermann@suse.de

drm/fbdev-generic: Implement dedicated fbdev I/O helpers

2023-06-01T10:41:40Z

Implement dedicated fbdev helpers for framebuffer I/O instead of using DRM's helpers. Use an fbdev generator macro for deferred I/O to create the callbacks. Fbdev-generic was the only caller of the DRM helpers, so remove them from the helper module. v4: * generate deferred-I/O helpers * use initializer macros for fb_ops v2: * use FB_SYS_HELPERS_DEFERRED option Signed-off-by: Thomas Zimmermann Tested-by: Sui Jingfeng Reviewed-by: Sui Jingfeng Link: https://patchwork.freedesktop.org/patch/msgid/20230530151228.22979-13-tzimmermann@suse.de

drm/fb-helper: Export helpers for marking damage areas

2023-06-01T10:41:40Z

Export drm_fb_helper_damage() and drm_fb_helper_damage_range(), which handle damage areas for fbdev emulation. This is a temporary export that allows to move the DRM I/O helpers for fbdev into drivers. Only fbdev-generic and i915 need them. Both will be updated to implement damage handling by themselves and the exported functions will be removed. v4: * update interfaces Signed-off-by: Thomas Zimmermann Acked-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20230530151228.22979-11-tzimmermann@suse.de

drm/fb-helper: Consolidate CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM

2023-03-22T12:32:52Z

Consolidate all handling of CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM by making the module parameter optional in drm_fb_helper.c. Without the config option, modules can set smem_start in struct fb_info for internal usage, but not export if to userspace. The address can only be exported by enabling the option and setting the module parameter. Also update the comment. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas Acked-by: Zack Rusin Tested-by: Sui Jingfeng Link: https://patchwork.freedesktop.org/patch/msgid/20230320150751.20399-8-tzimmermann@suse.de