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drm/fbdev-dma: Support struct drm_driver.fbdev_probe

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commit 8998eedda2 upstream.

Rework fbdev probing to support fbdev_probe in struct drm_driver
and reimplement the old fb_probe callback on top of it. Provide an
initializer macro for struct drm_driver that sets the callback
according to the kernel configuration.

This change allows the common fbdev client to run on top of DMA-
based DRM drivers.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240924071734.98201-6-tzimmermann@suse.de
Signed-off-by: Fabio Estevam <festevam@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Zimmermann 2025-05-19 13:32:28 -03:00 committed by Greg Kroah-Hartman
parent d22496de50
commit 25998ed87f
2 changed files with 48 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -105,6 +105,40 @@ static const struct fb_ops drm_fbdev_dma_deferred_fb_ops = {
static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper,
struct drm_fb_helper_surface_size *sizes)
{
return drm_fbdev_dma_driver_fbdev_probe(fb_helper, sizes);
}
static int drm_fbdev_dma_helper_fb_dirty(struct drm_fb_helper *helper,
struct drm_clip_rect *clip)
{
struct drm_device *dev = helper->dev;
int ret;
/* Call damage handlers only if necessary */
if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))
return 0;
if (helper->fb->funcs->dirty) {
ret = helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);
if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret))
return ret;
}
return 0;
}
static const struct drm_fb_helper_funcs drm_fbdev_dma_helper_funcs = {
.fb_probe = drm_fbdev_dma_helper_fb_probe,
.fb_dirty = drm_fbdev_dma_helper_fb_dirty,
};
/*
* struct drm_fb_helper
*/
int drm_fbdev_dma_driver_fbdev_probe(struct drm_fb_helper *fb_helper,
struct drm_fb_helper_surface_size *sizes)
{
struct drm_client_dev *client = &fb_helper->client;
struct drm_device *dev = fb_helper->dev;
@ -148,6 +182,7 @@ static int drm_fbdev_dma_helper_fb_probe(struct drm_fb_helper *fb_helper,
goto err_drm_client_buffer_delete;
}
fb_helper->funcs = &drm_fbdev_dma_helper_funcs;
fb_helper->buffer = buffer;
fb_helper->fb = fb;
@ -211,30 +246,7 @@ err_drm_client_buffer_delete:
drm_client_framebuffer_delete(buffer);
return ret;
}
static int drm_fbdev_dma_helper_fb_dirty(struct drm_fb_helper *helper,
struct drm_clip_rect *clip)
{
struct drm_device *dev = helper->dev;
int ret;
/* Call damage handlers only if necessary */
if (!(clip->x1 < clip->x2 && clip->y1 < clip->y2))
return 0;
if (helper->fb->funcs->dirty) {
ret = helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, clip, 1);
if (drm_WARN_ONCE(dev, ret, "Dirty helper failed: ret=%d\n", ret))
return ret;
}
return 0;
}
static const struct drm_fb_helper_funcs drm_fbdev_dma_helper_funcs = {
.fb_probe = drm_fbdev_dma_helper_fb_probe,
.fb_dirty = drm_fbdev_dma_helper_fb_dirty,
};
EXPORT_SYMBOL(drm_fbdev_dma_driver_fbdev_probe);
/*
* struct drm_client_funcs

12
include/drm/drm_fbdev_dma.h
View File

@ -4,12 +4,24 @@
#define DRM_FBDEV_DMA_H
struct drm_device;
struct drm_fb_helper;
struct drm_fb_helper_surface_size;
#ifdef CONFIG_DRM_FBDEV_EMULATION
int drm_fbdev_dma_driver_fbdev_probe(struct drm_fb_helper *fb_helper,
struct drm_fb_helper_surface_size *sizes);
#define DRM_FBDEV_DMA_DRIVER_OPS \
.fbdev_probe = drm_fbdev_dma_driver_fbdev_probe
void drm_fbdev_dma_setup(struct drm_device *dev, unsigned int preferred_bpp);
#else
static inline void drm_fbdev_dma_setup(struct drm_device *dev, unsigned int preferred_bpp)
{ }
#define DRM_FBDEV_DMA_DRIVER_OPS \
.fbdev_probe = NULL
#endif
#endif