Re: [PATCH libdrm] drm: Remove create_handle() drm_framebuffer "virtual".
From: Noralf TrÃnnes
Date: Wed Aug 09 2017 - 15:15:53 EST
Den 09.08.2017 01.42, skrev Joe Kniss:
Because all drivers currently use gem objects for framebuffer planes,
the virtual create_handle() is not required. This change adds a
struct drm_gem_object *gems[4] field to drm_framebuffer and removes
create_handle() function pointer from drm_framebuffer_funcs. The
corresponding *_create_handle() function is removed from each driver.
In many cases this change eliminates a struct *_framebuffer object,
as the only need for the derived struct is the addition of the gem
object pointer.
TESTED: compiled: allyesconfig ARCH=x86,arm platforms:i915, rockchip
Signed-off-by: Joe Kniss <djmk@xxxxxxxxxx>
---
Hi Joe,
I'm also looking into adding gem objs to drm_framebuffer in this patch:
[PATCH v2 01/22] drm: Add GEM backed framebuffer library
https://lists.freedesktop.org/archives/dri-devel/2017-August/149782.html
[...]
diff --git a/drivers/gpu/drm/drm_fb_cma_helper.c b/drivers/gpu/drm/drm_fb_cma_helper.c
index ade319d10e70..f5f011b910b1 100644
--- a/drivers/gpu/drm/drm_fb_cma_helper.c
+++ b/drivers/gpu/drm/drm_fb_cma_helper.c
@@ -31,14 +31,9 @@
#define DEFAULT_FBDEFIO_DELAY_MS 50
-struct drm_fb_cma {
- struct drm_framebuffer fb;
- struct drm_gem_cma_object *obj[4];
-};
-
struct drm_fbdev_cma {
struct drm_fb_helper fb_helper;
- struct drm_fb_cma *fb;
+ struct drm_framebuffer *fb;
This fb pointer isn't necessary, since fb_helper already has one.
Noralf.
const struct drm_framebuffer_funcs *fb_funcs;
};
@@ -72,7 +67,6 @@ struct drm_fbdev_cma {
*
* static struct drm_framebuffer_funcs driver_fb_funcs = {
* .destroy = drm_fb_cma_destroy,
- * .create_handle = drm_fb_cma_create_handle,
* .dirty = driver_fb_dirty,
* };
*
@@ -90,67 +84,50 @@ static inline struct drm_fbdev_cma *to_fbdev_cma(struct drm_fb_helper *helper)
return container_of(helper, struct drm_fbdev_cma, fb_helper);
}
-static inline struct drm_fb_cma *to_fb_cma(struct drm_framebuffer *fb)
-{
- return container_of(fb, struct drm_fb_cma, fb);
-}
-
void drm_fb_cma_destroy(struct drm_framebuffer *fb)
{
- struct drm_fb_cma *fb_cma = to_fb_cma(fb);
int i;
for (i = 0; i < 4; i++) {
- if (fb_cma->obj[i])
- drm_gem_object_put_unlocked(&fb_cma->obj[i]->base);
+ if (fb->gem_objs[i])
+ drm_gem_object_put_unlocked(fb->gem_objs[i]);
}
drm_framebuffer_cleanup(fb);
- kfree(fb_cma);
+ kfree(fb);
}
EXPORT_SYMBOL(drm_fb_cma_destroy);
-int drm_fb_cma_create_handle(struct drm_framebuffer *fb,
- struct drm_file *file_priv, unsigned int *handle)
-{
- struct drm_fb_cma *fb_cma = to_fb_cma(fb);
-
- return drm_gem_handle_create(file_priv,
- &fb_cma->obj[0]->base, handle);
-}
-EXPORT_SYMBOL(drm_fb_cma_create_handle);
-
static struct drm_framebuffer_funcs drm_fb_cma_funcs = {
.destroy = drm_fb_cma_destroy,
- .create_handle = drm_fb_cma_create_handle,
};
-static struct drm_fb_cma *drm_fb_cma_alloc(struct drm_device *dev,
+static struct drm_framebuffer *drm_fb_cma_alloc(struct drm_device *dev,
const struct drm_mode_fb_cmd2 *mode_cmd,
struct drm_gem_cma_object **obj,
unsigned int num_planes, const struct drm_framebuffer_funcs *funcs)
{
- struct drm_fb_cma *fb_cma;
+ struct drm_framebuffer *fb;
int ret;
int i;
- fb_cma = kzalloc(sizeof(*fb_cma), GFP_KERNEL);
- if (!fb_cma)
+ fb = kzalloc(sizeof(*fb), GFP_KERNEL);
+ if (!fb)
return ERR_PTR(-ENOMEM);
- drm_helper_mode_fill_fb_struct(dev, &fb_cma->fb, mode_cmd);
+ drm_helper_mode_fill_fb_struct(dev, fb, mode_cmd);
for (i = 0; i < num_planes; i++)
- fb_cma->obj[i] = obj[i];
+ fb->gem_objs[i] = &obj[i]->base;
- ret = drm_framebuffer_init(dev, &fb_cma->fb, funcs);
+ ret = drm_framebuffer_init(dev, fb, funcs);
if (ret) {
dev_err(dev->dev, "Failed to initialize framebuffer: %d\n", ret);
- kfree(fb_cma);
+ kfree(fb);
return ERR_PTR(ret);
}
- return fb_cma;
+ return fb;
}
/**
@@ -171,7 +148,7 @@ struct drm_framebuffer *drm_fb_cma_create_with_funcs(struct drm_device *dev,
const struct drm_framebuffer_funcs *funcs)
{
const struct drm_format_info *info;
- struct drm_fb_cma *fb_cma;
+ struct drm_framebuffer *fb;
struct drm_gem_cma_object *objs[4];
struct drm_gem_object *obj;
int ret;
@@ -205,13 +182,13 @@ struct drm_framebuffer *drm_fb_cma_create_with_funcs(struct drm_device *dev,
objs[i] = to_drm_gem_cma_obj(obj);
}
- fb_cma = drm_fb_cma_alloc(dev, mode_cmd, objs, i, funcs);
- if (IS_ERR(fb_cma)) {
- ret = PTR_ERR(fb_cma);
+ fb = drm_fb_cma_alloc(dev, mode_cmd, objs, i, funcs);
+ if (IS_ERR(fb)) {
+ ret = PTR_ERR(fb);
goto err_gem_object_put;
}
- return &fb_cma->fb;
+ return fb;
err_gem_object_put:
for (i--; i >= 0; i--)
@@ -250,12 +227,10 @@ EXPORT_SYMBOL_GPL(drm_fb_cma_create);
struct drm_gem_cma_object *drm_fb_cma_get_gem_obj(struct drm_framebuffer *fb,
unsigned int plane)
{
- struct drm_fb_cma *fb_cma = to_fb_cma(fb);
-
if (plane >= 4)
return NULL;
- return fb_cma->obj[plane];
+ return to_drm_gem_cma_obj(fb->gem_objs[plane]);
}
EXPORT_SYMBOL_GPL(drm_fb_cma_get_gem_obj);
@@ -272,13 +247,13 @@ dma_addr_t drm_fb_cma_get_gem_addr(struct drm_framebuffer *fb,
struct drm_plane_state *state,
unsigned int plane)
{
- struct drm_fb_cma *fb_cma = to_fb_cma(fb);
+ struct drm_gem_cma_object *cma_bo = drm_fb_cma_get_gem_obj(fb, plane);
dma_addr_t paddr;
- if (plane >= 4)
+ if (!cma_bo)
return 0;
- paddr = fb_cma->obj[plane]->paddr + fb->offsets[plane];
+ paddr = cma_bo->paddr + fb->offsets[plane];
paddr += fb->format->cpp[plane] * (state->src_x >> 16);
paddr += fb->pitches[plane] * (state->src_y >> 16);
@@ -321,7 +296,6 @@ EXPORT_SYMBOL_GPL(drm_fb_cma_prepare_fb);
#ifdef CONFIG_DEBUG_FS
static void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m)
{
- struct drm_fb_cma *fb_cma = to_fb_cma(fb);
int i;
seq_printf(m, "fb: %dx%d@%4.4s\n", fb->width, fb->height,
@@ -330,7 +304,7 @@ static void drm_fb_cma_describe(struct drm_framebuffer *fb, struct seq_file *m)
for (i = 0; i < fb->format->num_planes; i++) {
seq_printf(m, " %d: offset=%d pitch=%d, obj: ",
i, fb->offsets[i], fb->pitches[i]);
- drm_gem_cma_describe(fb_cma->obj[i], m);
+ drm_gem_cma_describe(drm_fb_cma_get_gem_obj(fb, i), m);
}
}
@@ -472,7 +446,7 @@ drm_fbdev_cma_create(struct drm_fb_helper *helper,
goto err_fb_info_destroy;
}
- fb = &fbdev_cma->fb->fb;
+ fb = fbdev_cma->fb;
helper->fb = fb;
fbi->par = helper;
@@ -500,7 +474,7 @@ drm_fbdev_cma_create(struct drm_fb_helper *helper,
return 0;
err_cma_destroy:
- drm_framebuffer_remove(&fbdev_cma->fb->fb);
+ drm_framebuffer_remove(fbdev_cma->fb);
err_fb_info_destroy:
drm_fb_helper_fini(helper);
err_gem_free_object:
@@ -598,7 +572,7 @@ void drm_fbdev_cma_fini(struct drm_fbdev_cma *fbdev_cma)
drm_fbdev_cma_defio_fini(fbdev_cma->fb_helper.fbdev);
if (fbdev_cma->fb)
- drm_framebuffer_remove(&fbdev_cma->fb->fb);
+ drm_framebuffer_remove(fbdev_cma->fb);
drm_fb_helper_fini(&fbdev_cma->fb_helper);
kfree(fbdev_cma);