Re: [PATCH] drm/exynos: Get HDMI version from device tree

On Tue, Jan 8, 2013 at 11:45 AM, Lucas Stach [off-list ref] wrote:

Am Montag, den 07.01.2013, 16:12 -0500 schrieb Sean Paul:

quoted

On Mon, Jan 7, 2013 at 3:54 PM, Mitch Bradley [off-list ref] wrote:

quoted

On 1/7/2013 10:43 AM, Sean Paul wrote:

quoted

Add a property to the hdmi node so we can specify the HDMI version in
the device tree instead of just defaulting to v1.4 with the existence of
the dt node.

Signed-off-by: Sean Paul <redacted>
---
 .../devicetree/bindings/drm/exynos/hdmi.txt        |    3 +++
 drivers/gpu/drm/exynos/exynos_hdmi.c               |   19 ++++++++++---------
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/drm/exynos/hdmi.txt b/Documentation/devicetree/bindings/drm/exynos/hdmi.txt
index 589edee..d1c7d91 100644
--- a/Documentation/devicetree/bindings/drm/exynos/hdmi.txt
+++ b/Documentation/devicetree/bindings/drm/exynos/hdmi.txt

@@ -11,6 +11,8 @@ Required properties:
      c) pin function mode.
      d) optional flags and pull up/down.
      e) drive strength.
+- samsung,supports-hdmi-1.4: Define if device supports HDMI v1.4
+- samsung,supports-hdmi-1.3: Define if device supports HDMI v1.3

a) This seems pretty generic, not at all samsung-specific, as the HDMI
version numbering space is well-defined by the HDMI spec.

b) It would be better to make it an integer property whose value
encodes the version number, thus eliminating the need to add new
properties as new HDMI versions appear.

Thanks for the quick review, Mitch.

How about:

- hdmi-version: 0=v1.3, 1=v1.4

Why bother obfuscating the real version number? Why not just 13=v1.3,
14=v1.4?

Sure, that sounds good to me.

Sean

Regards,
Lucas