On Mon, Jun 29, 2015 at 01:44:44PM -0700, Rodrigo Vivi wrote:
There are cases we need to mark dirty/damaged areas, specially with operations that touches frontbuffer directly. To cover these cases this patch introduces the optional fb_dirty operation.
Signed-off-by: Rodrigo Vivi rodrigo.vivi@intel.com
The problem is that drm ->dirty() hook must be called from process context, and iirc some of these callbacks can be called from softirq context (for cursor updates).
Since this is a special drm requirement I think it'd be better to implement this in the drm fbdev emulation (by wrapping the various cfb_* functions). We'd also need to do the actual ->dirty() call in an async worker. And that needs to check whether fbdev is still in charge or whether the work item raced with a kms client.
For the async worker you can look into qxl_fb.c. Essentially you could copy all these functions into drm_fb_helper.c, give them suitable prefixes and in qxl_fb_work instead of calling qxl_fb_dirty_flush directly we'd call ->dirty() on the fbdev fb through the generic vfunc hook.
That one is already implement and hooked up as qxl_framebuffer_surface_dirty. We don't even need to grab any locks in the worker since the normal DIRTYFB ioctl is also lockless. -Daniel
drivers/video/fbdev/core/cfbcopyarea.c | 3 +++ drivers/video/fbdev/core/cfbfillrect.c | 3 +++ drivers/video/fbdev/core/cfbimgblt.c | 4 ++++ drivers/video/fbdev/core/syscopyarea.c | 3 +++ drivers/video/fbdev/core/sysfillrect.c | 3 +++ drivers/video/fbdev/core/sysimgblt.c | 4 ++++ include/linux/fb.h | 3 +++ 7 files changed, 23 insertions(+)
diff --git a/drivers/video/fbdev/core/cfbcopyarea.c b/drivers/video/fbdev/core/cfbcopyarea.c index 6d4bfee..2e5b69f 100644 --- a/drivers/video/fbdev/core/cfbcopyarea.c +++ b/drivers/video/fbdev/core/cfbcopyarea.c @@ -427,6 +427,9 @@ void cfb_copyarea(struct fb_info *p, const struct fb_copyarea *area) src_idx += bits_per_line; } }
- if (p->fbops->fb_dirty)
p->fbops->fb_dirty(p, dx, dy, width, height);}
EXPORT_SYMBOL(cfb_copyarea); diff --git a/drivers/video/fbdev/core/cfbfillrect.c b/drivers/video/fbdev/core/cfbfillrect.c index ba9f58b..c8732d5 100644 --- a/drivers/video/fbdev/core/cfbfillrect.c +++ b/drivers/video/fbdev/core/cfbfillrect.c @@ -362,6 +362,9 @@ void cfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect) dst_idx += p->fix.line_length*8; } }
- if (p->fbops->fb_dirty)
p->fbops->fb_dirty(p, rect->dx, rect->dy, width, height);}
EXPORT_SYMBOL(cfb_fillrect); diff --git a/drivers/video/fbdev/core/cfbimgblt.c b/drivers/video/fbdev/core/cfbimgblt.c index a2bb276..09c2dbe 100644 --- a/drivers/video/fbdev/core/cfbimgblt.c +++ b/drivers/video/fbdev/core/cfbimgblt.c @@ -267,6 +267,7 @@ void cfb_imageblit(struct fb_info *p, const struct fb_image *image) u32 fgcolor, bgcolor, start_index, bitstart, pitch_index = 0; u32 bpl = sizeof(u32), bpp = p->var.bits_per_pixel; u32 width = image->width;
- u32 height = image->height; u32 dx = image->dx, dy = image->dy; u8 __iomem *dst1;
@@ -303,6 +304,9 @@ void cfb_imageblit(struct fb_info *p, const struct fb_image *image) start_index, pitch_index); } else color_imageblit(image, p, dst1, start_index, pitch_index);
- if (p->fbops->fb_dirty)
p->fbops->fb_dirty(p, dx, dy, width, height);}
EXPORT_SYMBOL(cfb_imageblit); diff --git a/drivers/video/fbdev/core/syscopyarea.c b/drivers/video/fbdev/core/syscopyarea.c index c1eda31..3f74683 100644 --- a/drivers/video/fbdev/core/syscopyarea.c +++ b/drivers/video/fbdev/core/syscopyarea.c @@ -360,6 +360,9 @@ void sys_copyarea(struct fb_info *p, const struct fb_copyarea *area) src_idx += bits_per_line; } }
- if (p->fbops->fb_dirty)
p->fbops->fb_dirty(p, dx, dy, width, height);}
EXPORT_SYMBOL(sys_copyarea); diff --git a/drivers/video/fbdev/core/sysfillrect.c b/drivers/video/fbdev/core/sysfillrect.c index 33ee3d3..f2c3efa 100644 --- a/drivers/video/fbdev/core/sysfillrect.c +++ b/drivers/video/fbdev/core/sysfillrect.c @@ -326,6 +326,9 @@ void sys_fillrect(struct fb_info *p, const struct fb_fillrect *rect) dst_idx += p->fix.line_length*8; } }
- if (p->fbops->fb_dirty)
p->fbops->fb_dirty(p, rect->dx, rect->dy, width, height);}
EXPORT_SYMBOL(sys_fillrect); diff --git a/drivers/video/fbdev/core/sysimgblt.c b/drivers/video/fbdev/core/sysimgblt.c index a4d05b1..d690fb5 100644 --- a/drivers/video/fbdev/core/sysimgblt.c +++ b/drivers/video/fbdev/core/sysimgblt.c @@ -243,6 +243,7 @@ void sys_imageblit(struct fb_info *p, const struct fb_image *image) u32 bpl = sizeof(u32), bpp = p->var.bits_per_pixel; u32 width = image->width; u32 dx = image->dx, dy = image->dy;
u32 height = image->height; void *dst1;
if (p->state != FBINFO_STATE_RUNNING)
@@ -278,6 +279,9 @@ void sys_imageblit(struct fb_info *p, const struct fb_image *image) start_index, pitch_index); } else color_imageblit(image, p, dst1, start_index, pitch_index);
- if (p->fbops->fb_dirty)
p->fbops->fb_dirty(p, dx, dy, width, height);}
EXPORT_SYMBOL(sys_imageblit); diff --git a/include/linux/fb.h b/include/linux/fb.h index 043f328..e17e4b7 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -284,6 +284,9 @@ struct fb_ops { /* wait for blit idle, optional */ int (*fb_sync)(struct fb_info *info);
- /* Mark rect as dirty (optional) */
- void (*fb_dirty)(struct fb_info *info, u32 x1, u32 y1, u32 x2, u32 y2);
- /* perform fb specific ioctl (optional) */ int (*fb_ioctl)(struct fb_info *info, unsigned int cmd, unsigned long arg);
-- 2.1.0
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