Den 06.11.2017 09.54, skrev Daniel Vetter:
On Sat, Nov 04, 2017 at 02:03:55PM +0100, Noralf Trønnes wrote:
Make the drm_framebuffer_funcs argument optional for drivers that
don't need to set the dirty callback.
Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx>
Looks like this patch ended up in the wrong patch series? Atm there's not
much users of this (I guess they're still waiting for acks), and somehow
I'd expect that there's some drivers which really want this (but I don't
see any in this patch series). Looks good, but I'm a bit confused.
The purpose of this change is so the driver doesn't have to provide a
fb vtable if it doesn't need to set the dirty calback.
So if I didn't rework the cma helper to get rid of struct drm_fbdev_cma,
I would have followed up with this change:
-static const struct drm_framebuffer_funcs drm_fb_cma_funcs = {
- .destroy = drm_gem_fb_destroy,
- .create_handle = drm_gem_fb_create_handle,
-};
-
/**
* drm_fbdev_cma_init() - Allocate and initializes a drm_fbdev_cma struct
* @dev: DRM device
* @preferred_bpp: Preferred bits per pixel for the device
* @max_conn_count: Maximum number of connectors
*
* Returns a newly allocated drm_fbdev_cma struct or a ERR_PTR.
*/
struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
unsigned int preferred_bpp, unsigned int max_conn_count)
{
return drm_fbdev_cma_init_with_funcs(dev, preferred_bpp,
max_conn_count,
- &drm_fb_cma_funcs);
+ NULL);
}
EXPORT_SYMBOL_GPL(drm_fbdev_cma_init);
Noralf.
-Daniel
---
drivers/gpu/drm/drm_gem_framebuffer_helper.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_gem_framebuffer_helper.c b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
index aa8cb9bfa499..4d682a6e8bcb 100644
--- a/drivers/gpu/drm/drm_gem_framebuffer_helper.c
+++ b/drivers/gpu/drm/drm_gem_framebuffer_helper.c
@@ -272,7 +272,8 @@ EXPORT_SYMBOL_GPL(drm_gem_fb_prepare_fb);
* @sizes: fbdev size description
* @pitch_align: Optional pitch alignment
* @obj: GEM object backing the framebuffer
- * @funcs: vtable to be used for the new framebuffer object
+ * @funcs: Optional vtable to be used for the new framebuffer object when the
+ * dirty callback is needed.
*
* This function creates a framebuffer from a &drm_fb_helper_surface_size
* description for use in the &drm_fb_helper_funcs.fb_probe callback.
@@ -300,6 +301,9 @@ drm_gem_fbdev_fb_create(struct drm_device *dev,
if (obj->size < mode_cmd.pitches[0] * mode_cmd.height)
return ERR_PTR(-EINVAL);
+ if (!funcs)
+ funcs = &drm_gem_fb_funcs;
+
return drm_gem_fb_alloc(dev, &mode_cmd, &obj, 1, funcs);
}
EXPORT_SYMBOL(drm_gem_fbdev_fb_create);
--
2.14.2
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