diff options
| author | Thomas Zimmermann <tzimmermann@suse.de> | 2024-04-19 10:29:36 +0200 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2024-05-02 11:33:34 +0200 |
| commit | 18bc074c226bfecd205bf031678f5e35ee55c3da (patch) | |
| tree | 67ff42b3b79367b2fb28eb8eb819994295c0ff53 /drivers | |
| parent | aae4682e5d66c1e1dc181fa341652e037237f144 (diff) | |
drm/fbdev: Clean up fbdev documentation
Rewrite some docs that are not up-to-date any longer. Remove the TODO
item for fbdev-generic conversion, as the helper has been replaced. Make
documentation for DMA, SHMEM and TTM emulation available.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Cc: Jonathan Corbet <corbet@lwn.net>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240419083331.7761-44-tzimmermann@suse.de
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/drm_drv.c | 2 | ||||
| -rw-r--r-- | drivers/gpu/drm/drm_fb_helper.c | 11 |
2 files changed, 3 insertions, 10 deletions
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 535b624d4c9d..b8186cf16230 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -346,7 +346,7 @@ void drm_minor_release(struct drm_minor *minor) * if (ret) * return ret; * - * drm_fbdev_generic_setup(drm, 32); + * drm_fbdev_{...}_setup(drm, 32); * * return 0; * } diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index d612133e2cf7..e2e19f49342e 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -85,12 +85,8 @@ static DEFINE_MUTEX(kernel_fb_helper_lock); * The fb helper functions are useful to provide an fbdev on top of a drm kernel * mode setting driver. They can be used mostly independently from the crtc * helper functions used by many drivers to implement the kernel mode setting - * interfaces. - * - * Drivers that support a dumb buffer with a virtual address and mmap support, - * should try out the generic fbdev emulation using drm_fbdev_generic_setup(). - * It will automatically set up deferred I/O if the driver requires a shadow - * buffer. + * interfaces. Drivers that use one of the shared memory managers, TTM, SHMEM, + * DMA, should instead use the corresponding fbdev emulation. * * Existing fbdev implementations should restore the fbdev console by using * drm_fb_helper_lastclose() as their &drm_driver.lastclose callback. @@ -126,9 +122,6 @@ static DEFINE_MUTEX(kernel_fb_helper_lock); * atomic context. If drm_fb_helper_deferred_io() is used as the deferred_io * callback it will also schedule dirty_work with the damage collected from the * mmap page writes. - * - * Deferred I/O is not compatible with SHMEM. Such drivers should request an - * fbdev shadow buffer and call drm_fbdev_generic_setup() instead. */ static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) |