Hi Ran,
On Thu, Feb 4, 2016 at 10:22 AM, Ran Shalit <ranshalit@xxxxxxxxx> wrote:
> On Thu, Feb 4, 2016 at 10:16 AM, Geert Uytterhoeven
> <geert@xxxxxxxxxxxxxx> wrote:
>> On Wed, Feb 3, 2016 at 9:54 PM, Ran Shalit <ranshalit@xxxxxxxxx> wrote:
>>> Is there any reason why fb_write is missing in skeletonfb.c ?
>>> Isn't it required ?
>>
>> No, it's not required, cfr. the comments in include/linux/fb.h:
>>
>> /* For framebuffers with strange non linear layouts or that do not
>> * work with normal memory mapped access
>> */
>> ssize_t (*fb_read)(struct fb_info *info, char __user *buf,
>> size_t count, loff_t *ppos);
>> ssize_t (*fb_write)(struct fb_info *info, const char __user *buf,
>> size_t count, loff_t *ppos);
>>
>> If not implemented, drivers/video/fbdev/core/fbmem.c:fb_write() will use
>> normal memory mapped access.
> But When we do:
> > cp mybitmap > /dev/fb0
> Which method is called (isn't fb_write is called) ?
drivers/video/fbdev/core/fbmem.c:fb_write()
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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