Re: [PATCH] video: s3c-fb: Add device tree support

Dear Mr. Han,

On 11 January 2012 14:46, Jingoo Han [off-list ref] wrote:

Hi, Thomas.

quoted

-----Original Message-----
From: Thomas Abraham [mailto:thomas.abraham@linaro.org]
Sent: Tuesday, January 10, 2012 5:02 AM
To: linux-fbdev@vger.kernel.org; devicetree-discuss@lists.ozlabs.org
Cc: FlorianSchandinat@gmx.de; grant.likely@secretlab.ca; rob.herring@calxeda.com; linux-arm-
kernel@lists.infradead.org; linux-samsung-soc@vger.kernel.org; kgene.kim@samsung.com;
jg1.han@samsung.com; patches@linaro.org
Subject: [PATCH] video: s3c-fb: Add device tree support

Add device tree based discovery support for Samsung's display controller.

Cc: Grant Likely <redacted>
Cc: Rob Herring <redacted>
Signed-off-by: Thomas Abraham <redacted>
---
 .../devicetree/bindings/fb/samsung-fb.txt          |  103 ++++++++++
 drivers/video/s3c-fb.c                             |  209 +++++++++++++++++++-
 2 files changed, 304 insertions(+), 8 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/fb/samsung-fb.txt

[...]

+- samsung,fimd-bpp: Specifies the bits per pixel. Two values should be
+  specified in the following order.
+    - max-bpp: maximum required bpp for the overlay.
+    - default-bpp: bpp supported by the overlay.
[...]
+             fimd-overlay0 {
+                     samsung,fimd-htiming = <64 16 48 1024>;
+                     samsung,fimd-vtiming = <64 16 3 600>;
+                     samsung,fimd-bpp = <24 32>;
+             };
+
+             fimd-overlay1 {
+                     samsung,fimd-htiming = <64 16 48 200>;
+                     samsung,fimd-vtiming = <64 16 3 100>;
+                     samsung,fimd-bpp = <16 32>;
+             };
+     };

In the above 'samsung-fb.txt', the order is defined as max-bpp and default-bpp.
However, <24 32> and <16 32> seems to be wrong.
It should be <32 24> and <32 16>, respectively.
Max bpp would be 32bpp in s3c-fb.

You are right. I will change the order in the documentation as
default-bpp and then max-bpp. Thanks for correction.

Regards,
Thomas.

Best regards,
Jingoo Han


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