For ATI GPU the crtc_base could be the base pointer to the memory buffer:
./drivers/gpu/drm/radeon/rv770.c:
u32 rv770_page_flip(struct radeon_device *rdev, int crtc_id, u64 crtc_base)
./drivers/gpu/drm/radeon/rs600.c:
void rs600_pre_page_flip(struct radeon_device *rdev, int crtc)
void rs600_post_
In general how it worked is explained here:
https://www.kernel.org/doc/htmldocs/drm/drm-kms-init.html
Not sure which is the name of your video card, but I think in general all
the page flip API should have access to the scan buffer (see link above).
For Intel these are possible APIs
:
static vo
Hi,
On Thu, Jan 9, 2014 at 1:17 PM, Mj Embd wrote:
> Hi,
>
> What are atags and are they still used after addition of device tree in linux
> ?
>
Refer [1] for more info on atags, and refer [2] for your second question.
[1] http://www.simtec.co.uk/products/SWLINUX/files/booting_article.html
[2]
Hi,
How can I enable VIDEOBUF2_VMALLOC?
I try 'make menuconfig', but I don't know how can I configure to
enable VIDEOBUF2_VMALLOC:
Symbol: VIDEOBUF2_VMALLOC [=n]
│ Type : tristate
│ Defined at drivers/media/v4l2-core/Kconfig:75
│ Depends on: MEDIA_SUPPORT [=y]
│ Selects: VIDEOBUF2_
Hi,
If my application allocate memory for input and output buffers, and
pass the pointer to a kernel driver (via v4l2 queue buffer operation),
can the kernel driver access it? Do I need to setup DMA before teh
kernel driver can read/write to it?
Thank you.
__
