Hi Tomasz,

On 10 May 2013 08:25, Vikas Sajjan vikas.sajjan@linaro.org wrote:

Hi Tomasz,

On 10 May 2013 05:35, Tomasz Figa tomasz.figa@gmail.com wrote:

...

Hi Vikas,

On Wednesday 08 of May 2013 11:31:34 Vikas Sajjan wrote:

...

Adds display timing node for a DP panel to Arndale Board DTS file

Signed-off-by: Vikas Sajjan vikas.sajjan@linaro.org

arch/arm/boot/dts/exynos5250-arndale.dts | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/exynos5250-arndale.dts b/arch/arm/boot/dts/exynos5250-arndale.dts index f68b820..c831a5c 100644 --- a/arch/arm/boot/dts/exynos5250-arndale.dts +++ b/arch/arm/boot/dts/exynos5250-arndale.dts @@ -459,4 +459,20 @@ samsung,lane-count = <4>; };

• display-timings {
  

•         native-mode = <&timing0>;
  

•         timing0: timing@0 {
  

•                 /* 2560x1600 DP panel */
  

•                 clock-frequency = <50000>;
  

•                 hactive = <2560>;
  

•                 vactive = <1600>;
  

•                 hfront-porch = <48>;
  

•                 hback-porch = <80>;
  

•                 hsync-len = <32>;
  

•                 vback-porch = <16>;
  

•                 vfront-porch = <8>;
  

•                 vsync-len = <6>;
  

•         };
  

• };
  

What display are those timings used for? Shouldn't they be placed inside node of that display?

This timing information will be used parsed by the FIMD probe with the

help of "Video Helper function" as done in this link

https://git.kernel.org/cgit/linux/kernel/git/daeinki/drm-exynos.git/commit/?...

Please refer to this patch which is used for exynos4412-origen and exynos5250-smdk5250 respectively in similar way

https://git.kernel.org/cgit/linux/kernel/git/kgene/linux-samsung.git/commit/...

https://git.kernel.org/cgit/linux/kernel/git/kgene/linux-samsung.git/commit/...

And also you can refer to Documentation/devicetree/bindings/video/display-timing.txt

Best regards,

...

Tomasz

-- Thanks and Regards Vikas Sajjan