Re: [RFC PATCH 3/5] video: exynos_dsi: Use generic PHY driver

On Wednesday 19 of June 2013 19:10:52 Sylwester Nawrocki wrote:

On 06/16/2013 11:15 PM, Tomasz Figa wrote:

quoted

On Friday 14 of June 2013 19:45:49 Sylwester Nawrocki wrote:

quoted

quoted

Use the generic PHY API instead of the platform callback to control
the MIPI DSIM DPHY.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---

 drivers/video/display/source-exynos_dsi.c |   36

+++++++++-------------------- include/video/exynos_dsi.h

|    5 ----
 
 2 files changed, 11 insertions(+), 30 deletions(-)

Yes, this is what I was really missing a lot while developing this
driver.

Definitely looks good! It's a shame we don't have this driver in
mainline yet ;)

Yes, I should have mentioned in the cover letter this patch depends
on modified version of this [1] patch set of yours. I'll drop this
patch and will update the driver staying in mainline now, but I won't
be able to test it, on a non-dt platform.

I guess even some pre-eliminary display (panel) API would be helpful.
The CDF development seems to have been stalled for some time. I wonder
if we could first have something that works for limited set of devices
and be extending it gradually, rather than living with zero support
for displays on DT based ARM platforms.

Well, the problem is that once we define a binding for displays, we will 
have to keep support for this binding even if we decide to change 
something.

But as I discussed with Laurent and Alexandre at LinuxCon Japan, we should 
be able to reuse V4L2 bindings for our purposes, so someone just needs to 
code a proof of concept implementation that doesn't necessarily provide 
full functionality yet, but allows to make something work. Probably based 
on already posted RFC versions of CDF.

CCed Laurent and Alexandre, as they might be able to shed even more light 
on this.

Best regards,
Tomasz

[1] http://www.spinics.net/lists/linux-fbdev/msg09689.html

Regards,
Sylwester