topic About HDMI CLOCK in i.MX Processors

About HDMI CLOCK

yitang — Mon, 13 Aug 2018 02:04:02 GMT

HI,FSL,In my item,we think the hdmi clock output is error,we check the clock is :

clk[IMX6QDL_CLK_HDMI_ISFR] = imx_clk_gate2("hdmi_isfr", "pll3_pfd1_540m", base + 0x70, 4);

is the hdmi clock source "pll3_pfd1_540m"?

Re: About HDMI CLOCK

igorpadykov — Tue, 14 Aug 2018 00:54:50 GMT

Hi yi

yes seems this is correct as from Table 18-3. System Clocks, Gating, and Override
i.MX6DQ Reference Manual isfrclk has clock source as video_27m_clk_root and it has
source as "pll3_pfd1_540m" according to
Figure 18-3. Clock Tree - Part 2, VIDEO_27M_CLK_ROOT,
https://www.nxp.com/docs/en/reference-manual/IMX6DQRM.pdf

Best regards
igor
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Re: About HDMI CLOCK

yitang — Tue, 14 Aug 2018 05:54:38 GMT

in my code, the clock setting is below:

clk[IMX6QDL_CLK_HDMI_ISFR] = imx_clk_gate2("hdmi_isfr", "pll3_pfd1_540m", base + 0x70, 4);

but the hdmi clock is not booting in kernel,why?