[PATCH V3 2/2] video: drm: exynos: Add device tree support
Sascha Hauer
s.hauer at pengutronix.de
Mon Aug 27 18:04:51 EST 2012
On Thu, Aug 16, 2012 at 03:38:09PM +0530, Leela Krishna Amudala wrote:
> Add device tree based discovery support for DRM-FIMD driver.
>
> Signed-off-by: Leela Krishna Amudala <l.krishna at samsung.com>
> ---
> Documentation/devicetree/bindings/fb/drm-fimd.txt | 80 +++++++++++++++++
> drivers/gpu/drm/exynos/exynos_drm_fimd.c | 95 ++++++++++++++++++++-
> 2 files changed, 173 insertions(+), 2 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/fb/drm-fimd.txt
>
> diff --git a/Documentation/devicetree/bindings/fb/drm-fimd.txt b/Documentation/devicetree/bindings/fb/drm-fimd.txt
> new file mode 100644
> index 0000000..8ad8814
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/fb/drm-fimd.txt
> @@ -0,0 +1,80 @@
> +* Samsung Display Controller using DRM frame work
> +
> +The display controller is used to transfer image data from memory to an
> +external LCD driver interface. It supports various color formats such as
> +rgb and yuv.
> +
> +Required properties:
> + - compatible: Should be "samsung,exynos5-drm" for fimd using DRM frame work.
> + - reg: physical base address of the controller and length of memory
> + mapped region.
> + - interrupts: Three interrupts should be specified. The interrupts should be
> + specified in the following order.
> + - VSYNC interrupt
> + - FIFO level interrupt
> + - FIMD System Interrupt
> +
> + - samsung,fimd-display: This property should specify the phandle of the
> + display device node which holds the video interface timing with the
> + below mentioned properties.
> +
> + - lcd-htiming: Specifies the horizontal timing for the overlay. The
> + horizontal timing includes four parameters in the following order.
> +
> + - horizontal back porch (in number of lcd clocks)
> + - horizontal front porch (in number of lcd clocks)
> + - hsync pulse width (in number of lcd clocks)
> + - Display panels X resolution.
> +
> + - lcd-vtiming: Specifies the vertical timing for the overlay. The
> + vertical timing includes four parameters in the following order.
> +
> + - vertical back porch (in number of lcd lines)
> + - vertical front porch (in number of lcd lines)
> + - vsync pulse width (in number of lcd clocks)
> + - Display panels Y resolution.
I started an approach to add a common description for displays:
https://patchwork.kernel.org/patch/1154751/https://patchwork.kernel.org/patch/1154751/
There are still comments to this approach, but I think rather than
inventing SoC specific bindings we should use a common binding.
Sascha
--
Pengutronix e.K. | |
Industrial Linux Solutions | http://www.pengutronix.de/ |
Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 |
Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
More information about the devicetree-discuss
mailing list