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drm/cma-helper: simplify setup for drivers with ->dirty callbacks

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If we store the fb funcs pointer, we can remove a bit of boilerplate.
Also remove the _fbdev_ in the example code, since the fb_funcs->dirty
callback has nothing to do with fbdev. It's a KMS feature, only
used by the fbdev deferred_io support to implement flushing/upload.

Cc: Noralf Trønnes <noralf@tronnes.org>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
[danvet: Move the misplaced kerneldoc change from a later patch to
this one here.]
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1483044517-5770-11-git-send-email-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2016-12-29 21:48:31 +01:00
parent 7357f89954
commit b112481bb3
2 changed files with 22 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
drivers/gpu/drm/drm_fb_cma_helper.c
View File

@ -39,6 +39,7 @@ struct drm_fb_cma {
struct drm_fbdev_cma {
struct drm_fb_helper fb_helper;
struct drm_fb_cma *fb;
const struct drm_framebuffer_funcs *fb_funcs;
};
/**
@ -58,39 +59,29 @@ struct drm_fbdev_cma {
*
* Example fbdev deferred io code::
*
* static int driver_fbdev_fb_dirty(struct drm_framebuffer *fb,
* struct drm_file *file_priv,
* unsigned flags, unsigned color,
* struct drm_clip_rect *clips,
* unsigned num_clips)
* static int driver_fb_dirty(struct drm_framebuffer *fb,
* struct drm_file *file_priv,
* unsigned flags, unsigned color,
* struct drm_clip_rect *clips,
* unsigned num_clips)
* {
* struct drm_gem_cma_object *cma = drm_fb_cma_get_gem_obj(fb, 0);
* ... push changes ...
* return 0;
* }
*
* static struct drm_framebuffer_funcs driver_fbdev_fb_funcs = {
* static struct drm_framebuffer_funcs driver_fb_funcs = {
* .destroy = drm_fb_cma_destroy,
* .create_handle = drm_fb_cma_create_handle,
* .dirty = driver_fbdev_fb_dirty,
* .dirty = driver_fb_dirty,
* };
*
* static int driver_fbdev_create(struct drm_fb_helper *helper,
* struct drm_fb_helper_surface_size *sizes)
* {
* return drm_fbdev_cma_create_with_funcs(helper, sizes,
* &driver_fbdev_fb_funcs);
* }
* Initialize::
*
* static const struct drm_fb_helper_funcs driver_fb_helper_funcs = {
* .fb_probe = driver_fbdev_create,
* };
*
* Initialize:
* fbdev = drm_fbdev_cma_init_with_funcs(dev, 16,
* dev->mode_config.num_crtc,
* dev->mode_config.num_connector,
* &driver_fb_helper_funcs);
* &driver_fb_funcs);
*
*/
@ -408,13 +399,9 @@ static void drm_fbdev_cma_defio_fini(struct fb_info *fbi)
kfree(fbi->fbops);
}
/*
* For use in a (struct drm_fb_helper_funcs *)->fb_probe callback function that
* needs custom struct drm_framebuffer_funcs, like dirty() for deferred_io use.
*/
int drm_fbdev_cma_create_with_funcs(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes,
const struct drm_framebuffer_funcs *funcs)
static int
drm_fbdev_cma_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct drm_fbdev_cma *fbdev_cma = to_fbdev_cma(helper);
struct drm_mode_fb_cmd2 mode_cmd = { 0 };
@ -450,7 +437,8 @@ int drm_fbdev_cma_create_with_funcs(struct drm_fb_helper *helper,
goto err_gem_free_object;
}
fbdev_cma->fb = drm_fb_cma_alloc(dev, &mode_cmd, &obj, 1, funcs);
fbdev_cma->fb = drm_fb_cma_alloc(dev, &mode_cmd, &obj, 1,
fbdev_cma->fb_funcs);
if (IS_ERR(fbdev_cma->fb)) {
dev_err(dev->dev, "Failed to allocate DRM framebuffer.\n");
ret = PTR_ERR(fbdev_cma->fb);
@ -476,7 +464,7 @@ int drm_fbdev_cma_create_with_funcs(struct drm_fb_helper *helper,
fbi->screen_size = size;
fbi->fix.smem_len = size;
if (funcs->dirty) {
if (fbdev_cma->fb_funcs->dirty) {
ret = drm_fbdev_cma_defio_init(fbi, obj);
if (ret)
goto err_cma_destroy;
@ -493,13 +481,6 @@ err_gem_free_object:
drm_gem_object_unreference_unlocked(&obj->base);
return ret;
}
EXPORT_SYMBOL(drm_fbdev_cma_create_with_funcs);
static int drm_fbdev_cma_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
return drm_fbdev_cma_create_with_funcs(helper, sizes, &drm_fb_cma_funcs);
}
static const struct drm_fb_helper_funcs drm_fb_cma_helper_funcs = {
.fb_probe = drm_fbdev_cma_create,
@ -511,13 +492,13 @@ static const struct drm_fb_helper_funcs drm_fb_cma_helper_funcs = {
* @preferred_bpp: Preferred bits per pixel for the device
* @num_crtc: Number of CRTCs
* @max_conn_count: Maximum number of connectors
* @funcs: fb helper functions, in particular fb_probe()
* @funcs: fb helper functions, in particular a custom dirty() callback
*
* Returns a newly allocated drm_fbdev_cma struct or a ERR_PTR.
*/
struct drm_fbdev_cma *drm_fbdev_cma_init_with_funcs(struct drm_device *dev,
unsigned int preferred_bpp, unsigned int num_crtc,
unsigned int max_conn_count, const struct drm_fb_helper_funcs *funcs)
unsigned int max_conn_count, const struct drm_framebuffer_funcs *funcs)
{
struct drm_fbdev_cma *fbdev_cma;
struct drm_fb_helper *helper;
@ -528,10 +509,11 @@ struct drm_fbdev_cma *drm_fbdev_cma_init_with_funcs(struct drm_device *dev,
dev_err(dev->dev, "Failed to allocate drm fbdev.\n");
return ERR_PTR(-ENOMEM);
}
fbdev_cma->fb_funcs = funcs;
helper = &fbdev_cma->fb_helper;
drm_fb_helper_prepare(dev, helper, funcs);
drm_fb_helper_prepare(dev, helper, &drm_fb_cma_helper_funcs);
ret = drm_fb_helper_init(dev, helper, num_crtc, max_conn_count);
if (ret < 0) {
@ -577,7 +559,7 @@ struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
unsigned int max_conn_count)
{
return drm_fbdev_cma_init_with_funcs(dev, preferred_bpp, num_crtc,
max_conn_count, &drm_fb_cma_helper_funcs);
max_conn_count, &drm_fb_cma_funcs);
}
EXPORT_SYMBOL_GPL(drm_fbdev_cma_init);

5
include/drm/drm_fb_cma_helper.h
View File

@ -17,7 +17,7 @@ struct drm_plane_state;
struct drm_fbdev_cma *drm_fbdev_cma_init_with_funcs(struct drm_device *dev,
unsigned int preferred_bpp, unsigned int num_crtc,
unsigned int max_conn_count, const struct drm_fb_helper_funcs *funcs);
unsigned int max_conn_count, const struct drm_framebuffer_funcs *funcs);
struct drm_fbdev_cma *drm_fbdev_cma_init(struct drm_device *dev,
unsigned int preferred_bpp, unsigned int num_crtc,
unsigned int max_conn_count);
@ -26,9 +26,6 @@ void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma);
void drm_fbdev_cma_restore_mode(struct drm_fbdev_cma *fbdev_cma);
void drm_fbdev_cma_hotplug_event(struct drm_fbdev_cma *fbdev_cma);
void drm_fbdev_cma_set_suspend(struct drm_fbdev_cma *fbdev_cma, int state);
int drm_fbdev_cma_create_with_funcs(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes,
const struct drm_framebuffer_funcs *funcs);
void drm_fb_cma_destroy(struct drm_framebuffer *fb);
int drm_fb_cma_create_handle(struct drm_framebuffer *fb,