Hi,
On 11/25/2016 12:07 AM, Fabio Estevam wrote:
Hi Laurent,
On Thu, Nov 24, 2016 at 7:16 PM, Laurent Pinchart
<laurent.pinchart@xxxxxxxxxxxxxxxx> wrote:
Hi Andy,
As the author of the DW-HDMI DT bindings this question is addressed to you,
but information from anyone is more than welcome.
The DT bindings specify two clocks named "iahb" and "isfr" but don't describe
them. While I assume that the "isfr" clock corresponds to the "isfrclk" input
signal of the DW HDMI, there is no "iahb" clock described in the IP core
datasheet.
i.MX6Q has a DW-HDMI IP block.
The names in the devicetree binding matches the ones listed at the
i.MX6Q Reference Manual - Table 33-1. HDMI Clocks
correct, for your convenience the table is copied below:
Clock name | Clock Root | Description
-----------+--------------------+---------------------------------------
iahbclk | ahb_clk_root | Bus clock
icecclk | ckil_sync_clk_root | CEC low-frequency clock (32kHZ)
ihclk | ahb_clk_root | Module clock
isfrclk | video_27m_clk_root | Internal SFR clock (video clock 27MHz)
Here AHB stands for ARM Advanced High-performance Bus.
By the way while we're discussing DW HDMI bindings specific to iMX,
I would recommend to remove utterly hackish and iMX only "gpr"
property from the example in bindings/display/bridge/dw_hdmi.txt
--
With best wishes,
Vladimir
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